CN104022638A - Electromagnetic interference suppression device, switching power supply and illuminating lamp - Google Patents
Electromagnetic interference suppression device, switching power supply and illuminating lamp Download PDFInfo
- Publication number
- CN104022638A CN104022638A CN201310066592.2A CN201310066592A CN104022638A CN 104022638 A CN104022638 A CN 104022638A CN 201310066592 A CN201310066592 A CN 201310066592A CN 104022638 A CN104022638 A CN 104022638A
- Authority
- CN
- China
- Prior art keywords
- electric capacity
- connects
- electromagnetic interference
- output
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention provides an electromagnetic interference suppression device. The electromagnetic interference suppression device includes a first input end, a second input end, a first output end and a second output end, and also includes a common-mode signal suppression module and a different-mode signal suppression module, wherein the common-mode signal suppression module includes a common-mode choking coil, a first safety capacitor, a second safety capacitor and a third safety capacitor, a first input end and a second input end of the common-mode choking coil are connected with the first input end and the second input end of the electromagnetic interference suppression device respectively, the different-mode signal suppression module includes a first different-mode choking coil, a second different-mode chocking coil, a fourth safety capacitor, a fifth safety capacitor and a sixth safety capacitor, an output end of the first different-mode choking coil is connected with the first output end of the electromagnetic interference suppression device, and an output end of the second different-mode choking coil is connected with the second output end of the electromagnetic interference suppression device. The invention also provides a switching power supply and an illuminating lamp. The electromagnetic interference suppression device, the switching power supply and the illuminating lamp in the invention effectively suppress electromagnetic interference under circumstances of low cost and small size.
Description
Technical field
The present invention relates to electronic circuit field, relate in particular to a kind of device for restraining electromagnetic interference, Switching Power Supply and lighting.
Background technology
Along with the development of modern electronic technology and power device, Switching Power Supply is little with its volume, lightweight, high-performance, the features such as high reliability are widely used in the fields such as computer and ancillary equipment communication, control automatically, household electrical appliance, for people's productive life and social construction provide very large help.But, along with the fast development of modern electronic technology, the extensive use of electronic electric equipment, the various electronics in same operational environment, the distance of electric equipment are more and more nearer, and the external environment condition of electronic circuit work further worsens.
Because Switching Power Supply is operated in HF switch state, inner meeting produces very high electric current, voltage change ratio, causes Switching Power Supply to produce stronger electromagnetic interference.Similarly, lighting also exists electromagnetic interference.
Electromagnetic interference signal not only pollutes electrical network, also directly has influence on the even normal work of power supply of other power consumption equipments itself, and swarms into space as radiated interference, causes electromagnetic pollution, is restricting people's production and life.
The method that on market, electromagnetic interference suppresses is a lot, and conventional method shields whole circuit, so just has the shortcomings such as the material cost of screened circuit is expensive, and volume is large.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiency that above-mentioned prior art exists, and proposes a kind of device for restraining electromagnetic interference, Switching Power Supply and lighting, can solve and suppress high, the bulky problem of material cost that electromagnetic interference is used.
For solving the problems of the technologies described above, the present invention proposes a kind of device for restraining electromagnetic interference, it comprises first input end, the second input, the first output and the second output, the first input end of device for restraining electromagnetic interference is connected power supply with the second input, it also comprises: common-mode signal suppresses module, it comprises: common mode choke coil, it comprises first input end, the second input, the first output and the second output, the first input end of common mode choke coil connects the first input end of device for restraining electromagnetic interference, the second input of common mode choke coil connects the second input of device for restraining electromagnetic interference, the first safety electric capacity, the first safety electric capacity is connected between the first input end and the second input of common mode choke coil, the second safety electric capacity, the second safety electric capacity is connected between first output and ground of common mode choke coil, and the 3rd safety electric capacity, the 3rd safety electric capacity is connected between second output and ground of common mode choke coil, and difference mode signal inhibition module, it comprises: the first differential mode choking-winding, and the input of the first differential mode choking-winding connects the first output of common mode choke coil, and the output of the first differential mode choking-winding connects the first output of device for restraining electromagnetic interference, and the second differential mode choking-winding, the input of the second differential mode choking-winding connects the second output of common mode choke coil, and the output of the second differential mode choking-winding connects the second output of device for restraining electromagnetic interference, the 4th safety electric capacity, the 4th safety electric capacity is connected between the input of the first differential mode choking-winding and the input of the second differential mode choking-winding, the 5th safety electric capacity, the 5th safety electric capacity is connected between first output and ground of device for restraining electromagnetic interference, and the 6th safety electric capacity, the 6th safety electric capacity is connected between second output and ground of device for restraining electromagnetic interference.
Preferably, the first safety electric capacity and the 4th safety electric capacity are μ F levels, and the second safety electric capacity, the 3rd safety electric capacity, the 5th safety electric capacity and the 6th safety electric capacity are nF levels.
The present invention also proposes a kind of Switching Power Supply, comprises device for restraining electromagnetic interference as above.
The present invention also proposes a kind of lighting, comprising: fluorescent tube, startup module, driver module and device for restraining electromagnetic interference as above, device for restraining electromagnetic interference connects startup module, starts module and connects driver module, driver module connecting tube.
Preferably, driver module comprises the first switching tube, the first inductance, the first resistance, the second resistance, second switch pipe, the 3rd resistance, the 4th resistance, the second inductance, common mode inductance, the 3rd inductance, the first electric capacity, the second electric capacity and the 3rd electric capacity, and fluorescent tube comprises first end, the second end, the 3rd end and the 4th end; The input of the first switching tube connects the first output of device for restraining electromagnetic interference, the control end of the first switching tube connects the one end that connects the first inductance after the first resistance, the output of the first switching tube connects the other end that connects the first inductance after the second resistance, the input of the first switching tube connects ground connection after the first electric capacity and the second electric capacity successively, the 4th end of the junction connecting tube of the first electric capacity and the second electric capacity, the second end of the 3rd electric capacity connecting tube and the 3rd end; The input of second switch pipe connects the other end of the first inductance, the input of second switch pipe connects the first end of connecting tube after the 3rd inductance and common mode inductance successively, the control end of second switch pipe connects ground connection after the 3rd resistance and the second inductance successively, and the output of second switch pipe connects ground connection after the 4th resistance.
Preferably, the first switching tube and second switch pipe are triode.
Preferably, the first switching tube and second switch pipe are metal-oxide-semiconductor.
Preferably, start module and comprise the 5th resistance, bidirectional triode thyristor and the 4th electric capacity, the 5th resistance and the 4th capacitances in series are between first output and the second output of device for restraining electromagnetic interference, one end of bidirectional triode thyristor connects the junction of the 5th resistance and the 4th electric capacity, and the other end of bidirectional triode thyristor connects driver module.
Compared with prior art, device for restraining electromagnetic interference of the present invention, Switching Power Supply and lighting, by the cooperation of safety electric capacity, common mode choke coil and differential mode choking-winding, can effectively suppress electromagnetic interference, reduced cost low, and volume is little, uses more convenient.
Brief description of the drawings
Fig. 1 is the circuit diagram of lighting of the present invention.
Description of reference numerals is as follows: device for restraining electromagnetic interference 1 common-mode signal suppresses module 11 common mode choke coil L3 first safety capacitor C X1 the second safety capacitor C X2 the 3rd safety capacitor C X3 difference mode signals and suppresses module 12 first differential mode choking-winding L1 the second differential mode choking-winding L2 the 4th safety capacitor C X4 the 5th safety capacitor C X5 the 6th safety capacitor C X6; Start module 2 first diode D1 the second diode D2 the 3rd diode D3 the 5th resistance R 5 the 6th resistance R 6 bidirectional triode thyristor DB the 4th capacitor C 4 the 5th capacitor C 5; Driver module 3 first switching tube Q1 first inductance N1 first resistance R 1 second resistance R 2 second switch pipe Q2 the 3rd resistance R 3 the 4th resistance R 4 second inductance N2 common mode inductance L the 3rd inductance N3 the first capacitor C 1 second capacitor C 2 the 3rd capacitor C 3 fluorescent tubes 4.
Embodiment
In order to further illustrate principle of the present invention and structure, existing by reference to the accompanying drawings to a preferred embodiment of the present invention will be described in detail.
Refer to Fig. 1, device for restraining electromagnetic interference 1 of the present invention comprises first input end, the second input, the first output and the second output.The first input end of device for restraining electromagnetic interference 1 is connected power supply with the second input.
Device for restraining electromagnetic interference 1 comprises: common-mode signal suppresses module 11 and difference mode signal suppresses module 12.
Common-mode signal suppresses module 11 and comprises: common mode choke coil L3, the first safety capacitor C X1, the second safety capacitor C X2 and the 3rd safety capacitor C X3.Common mode choke coil L3 comprises first input end, the second input, the first output and the second output, the first input end of common mode choke coil L3 connects the first input end of device for restraining electromagnetic interference 1, and the second input of common mode choke coil L3 connects the second input of device for restraining electromagnetic interference 1.The first safety capacitor C X1 is connected between the first input end and the second input of common mode choke coil L3.The second safety capacitor C X2 is connected between the first output and ground of common mode choke coil L3.The 3rd safety capacitor C X3 is connected between the second output and ground of common mode choke coil L3.
Difference mode signal suppresses module 12 and comprises: the first differential mode choking-winding L1, the second differential mode choking-winding L2, the 4th safety capacitor C X4, the 5th safety capacitor C X5 and the 6th safety capacitor C X6.The input of the first differential mode choking-winding L1 connects the first output of common mode choke coil L3, and the output of the first differential mode choking-winding L1 connects the first output of device for restraining electromagnetic interference 1.The input of the second differential mode choking-winding L2 connects the second output of common mode choke coil L3, and the output of the second differential mode choking-winding L2 connects the second output of device for restraining electromagnetic interference 1.The 4th safety capacitor C X4 is connected between the input of the first differential mode choking-winding L1 and the input of the second differential mode choking-winding L2.The 5th safety capacitor C X5 is connected between first output and ground of device for restraining electromagnetic interference 1.The 6th safety capacitor C X6 is connected between second output and ground of device for restraining electromagnetic interference 1.
In the present embodiment, the first safety capacitor C X1 and the 4th safety capacitor C X4 are μ F levels, and the second safety capacitor C X2, the 3rd safety capacitor C X3, the 5th safety capacitor C X5 and the 6th safety capacitor C X6 are nF levels.
The thin and thick of the material silicon steel sheet of common mode choke coil L3, the first differential mode choking-winding L1 and the second differential mode choking-winding L2 is all to have certain requirement, and the silicon steel sheet eddy current that more small property is given birth to is less, and loss is just less.
The present invention also proposes a kind of Switching Power Supply, comprises above-mentioned device for restraining electromagnetic interference 1.
Please continue to refer to Fig. 1, the present invention also provides a kind of lighting, comprising: above-mentioned device for restraining electromagnetic interference 1, startup module 2, driver module 3 and fluorescent tube 4.Device for restraining electromagnetic interference 1 connects startup module 2, starts module 2 and connects driver module 3, driver module 3 connecting tubes 4.
Start module 2 and comprise the 5th resistance R 5, the 6th resistance R 6, bidirectional triode thyristor DB, the 4th capacitor C 4, the 5th capacitor C 5, the first diode D1, the second diode D2 and the 3rd diode D3.The 5th resistance R 5 and the 4th capacitor C 4 are connected between first output and the second output of device for restraining electromagnetic interference 1, one end of bidirectional triode thyristor DB connects the junction of the 5th resistance R 5 and the 4th capacitor C 4, and the other end of bidirectional triode thyristor DB connects second switch pipe Q2.The junction of the anodic bonding of the first diode D1 the 5th resistance R 5 and the 4th capacitor C 4.Between the first output of device for restraining electromagnetic interference 1 and the negative electrode of the first diode D1, be parallel with the 6th resistance R 6, the 5th capacitor C 5 and the second diode D2, between the second output of device for restraining electromagnetic interference 1 and the negative electrode of the first diode D1, be connected with the 3rd diode D3.By this startup module 2, can make second switch pipe Q2 conducting, thus start-up circuit.
Driver module 3 comprises the first switching tube Q1, the first inductance N1, the first resistance R 1, the second resistance R 2, second switch pipe Q2, the 3rd resistance R 3, the 4th resistance R 4, the second inductance N2, common mode inductance L, the 3rd inductance N3, the first capacitor C 1, the second capacitor C 2 and the 3rd capacitor C 3.Fluorescent tube 4 comprises first end, the second end, the 3rd end and the 4th end.
The input of the first switching tube Q1 connects the first output of device for restraining electromagnetic interference 1, the control end of the first switching tube Q1 connects one end of rear connection the first inductance N1 of the first resistance R 1, the output of the first switching tube Q1 connects the other end of rear connection the first inductance N1 of the second resistance R 2, the input of the first switching tube Q1 connects the first capacitor C 1 and the rear ground connection of the second capacitor C 2, the 4th end of the junction connecting tube 4 of the first capacitor C 1 and the second capacitor C 2 successively.The second end of the 3rd capacitor C 3 connecting tubes 4 and the 3rd end.The input of second switch pipe Q2 connects the other end of the first inductance N1, the input of second switch pipe Q2 connects the first end of connecting tube 4 after the 3rd inductance N3 and common mode inductance L successively, the control end of second switch pipe Q2 connects ground connection after the 3rd resistance R 3 and the second inductance N2 successively, and the output of second switch pipe Q2 connects the 4th resistance R 4.The second end of the 3rd capacitor C 3 connecting tubes 4 and the 3rd end.The 4th end of fluorescent tube 4 connects the junction of described the first capacitor C 1 and the second capacitor C 2.In the present embodiment, the pin 0 of fluorescent tube 4 is the second end, and the pin one of fluorescent tube 4 is first end, and the pin 3 of fluorescent tube 4 is the 3rd end, and the pin 4 of fluorescent tube 4 is the 4th end.By this driver module 3, can produce sine wave and light fluorescent tube 4.
In the present embodiment, the first switching tube Q1 and second switch pipe Q2 are triode.In other embodiments, the first switching tube Q1 and second switch pipe Q2 can be metal-oxide-semiconductor.
Describe the operation principle of device for restraining electromagnetic interference of the present invention in detail below in conjunction with Fig. 1.
The first safety capacitor C X1 and the 4th safety capacitor C X4 can effectively reduce the impact of high-frequency impulse on subsequent conditioning circuit, for suppressing the difference mode signal of circuit.The second safety capacitor C X2, the 3rd safety capacitor C X3, the 5th safety capacitor C X5 and the 6th safety capacitor C X6 can provide return passage the most efficiently for high-frequency signal, reduce the impact that high-frequency signal brings to circuit, can suppress the common-mode signal in circuit.
The operation principle of common mode choke coil L3 is opposite direction while utilizing its signal code or source current to flow through in two windings, the magnetic flux producing is cancelled out each other, choke presents Low ESR, when common mode noise current (comprises the harassing and wrecking electric current that ground loop causes, also locate to be called longitudinal current) direction is identical while flowing through two windings, the magnetic flux producing is added in the same way, and choke presents high impedance, so just effectively suppresses common-mode signal.
The first differential mode choking-winding L1 and the second differential mode choking-winding L2 are low pass inductance components, high frequency is presented to high-impedance state, low frequency passes through, and can reduce the differential mode interference signal of Switching Power Supply inside, and the electromagnetic interference signal producing when relaxation equipment itself is worked greatly is again transmitted to electrical network.
Describe again the operation principle of lighting of the present invention below in detail in conjunction with Fig. 1.
First, start-up circuit.This lighting connects AC power, after device for restraining electromagnetic interference 1 filtering interference signals, the integrating circuit consisting of the 5th resistance R 5, the 4th capacitor C 4 again charges to the 4th capacitor C 4, in the time that the voltage in the 4th capacitor C 4 reaches the conducting voltage of bidirectional triode thyristor DB, bidirectional triode thyristor DB conducting.After bidirectional triode thyristor DB conducting, because the switching frequency of the first switching tube Q1 and second switch pipe Q2 is high, the 4th capacitor C 4 is charged insufficient, superincumbent voltage is the sawtooth waveforms that some amplitudes are very little, do not reach the conducting voltage of bidirectional triode thyristor DB, once therefore circuit starts, just no longer conducting of bidirectional triode thyristor DB.
Then, circuit starting of oscillation.The base stage that bidirectional triode thyristor DB On current directly enters second switch pipe Q2, drive second switch pipe Q2 conducting, after second switch pipe Q2 conducting, as we can see from the figure, the path of flowing through of electric current is: collector electrode → four resistance R 4 → ground of VC positive pole → the first capacitor C 1 → filament → three capacitor C 3 → filament → common mode inductance L → three inductance N3 → second switch pipe Q2.
After circuit starting of oscillation, driver module 3 is through 4 states below:
(1) second switch pipe Q2 conducting, the first switching tube Q1 cut-off, the electric current that flows through the 3rd inductance N3 makes the 3rd inductance N3 produce an induced electromotive force that stops this electric current to increase, and the polarity of the 3rd inductance N3 is Same Name of Ends for just.The 3rd inductance N3 is coupled to the first inductance N1, the second inductance N2, therefore, and the first inductance N1, the Same Name of Ends induced electromotive force of the second inductance N2 is for just.Induced electromotive force on the first inductance N1 reduces the base voltage of the first switching tube Q1, makes the first switching tube Q1 remain off.Induced electromotive force on the second inductance N2 increases the base voltage of second switch pipe Q2, the base current of second switch pipe Q2 increases, the collector current of second switch pipe Q2 increases, induced electromotive force on the 3rd inductance N3 is strengthened, the first inductance N1, induced electromotive force on the second inductance N2 is strengthened, and forms positive feedback and makes second switch pipe Q2 saturated gradually.
The collector current of second switch pipe Q2 constantly increases, and makes magnetic core magnetic permeability reach maximum, and magnetic permeability starts to decline, and the collector current of second switch pipe Q2 continues to increase sharply declines magnetic permeability.The first inductance N1, the second inductance N2, the induced electromotive force on the 3rd inductance N3 sharply declines.The decline of the second inductance N2 induced electromotive force declines the base voltage of second switch pipe Q2, collector current starts to decline, the 3rd inductance N3 produces induced electromotive force and stops this electric current to reduce, polarity is that Same Name of Ends is negative, the induced electromotive force of the 3rd inductance N3 is coupled to the first inductance N1, the second inductance N2, and Same Name of Ends is for negative, the base voltage of second switch pipe Q2 declines, and the voltage of the first switching tube Q1 rises.Second switch pipe Q2 is sharply tending towards cut-off, and the first switching tube Q1 is tending towards conducting.
(2) when the first switching tube Q1 will conducting, when second switch pipe Q2 has ended, (flowing through the electric current of the 3rd inductance N3) heater current can not be by second switch pipe Q2, now afterflow electric capacity the 5th capacitor C 5 plays a role, this electric current, to the 5th capacitor C 5 reverse chargings, keeps the continuous flow of heater current.
(3) first switching tube Q1 conductings, second switch pipe Q2 cut-off, now current path is: VC positive pole → the first switching tube Q1 → the second resistance R the 2 → three inductance N3 → common mode inductance L → filament → three capacitor C 3 → filament → the second capacitor C 2 → ground.
Because positive feedback effect makes the first switching tube Q1 saturated, the emitter current of the first switching tube Q1 increases, and the electric current that flows through the 3rd inductance N3 increases, and makes magnetic core magnetic permeability reach maximum.And the first switching tube Q1 emitter current continues to increase, magnetic permeability is sharply declined, the first inductance N1, the second inductance N2, induced electromotive force on the 3rd inductance N3 declines, and the base voltage of the first switching tube Q1 declines, and the first switching tube Q1 emitter current declines, the 3rd inductance N3 produces induced electromotive force and stops this electric current to decline, and the induced electromotive force direction of the 3rd inductance N3 becomes again Same Name of Ends for just.By the induced electromotive force increase on positive feedback the first inductance N1, the base voltage of the first switching tube Q1 is sharply declined, the induced electromotive force increase on the second inductance N2 sharply increases the base voltage of second switch pipe Q2.The first switching tube Q1 is tending towards cut-off, and second switch pipe Q2 is tending towards conducting.
(4) when the first switching tube Q1 cut-off, when second switch pipe Q2 will conducting, heater current can not flow through the first switching tube Q1, and now heater current, still by the 5th capacitor C 5 afterflows, keeps heater current continuous.
The first switching tube Q1 cut-off, second switch pipe Q2 conducting, circuit repeats again through (1) (2) (3) (4) state, so circulation, circuit enters oscillatory regime.
Circuit enters after oscillatory regime, between the emitter of the first switching tube Q1 and the collector electrode of second switch pipe Q2, produce square wave, the first switching tube Q1 is when saturated, when second switch pipe Q2 cut-off, form edge on square wave, amplitude is: [pressure drop in saturated tube voltage drop+the second resistance R 2 of VC-(the first switching tube Q1)]; The first switching tube Q1 cut-off, when second switch pipe Q2 is saturated, forms edge under square wave, and amplitude is: [pressure drop in saturated tube voltage drop+four resistance R 4 of second switch pipe Q2].To form the voltage of passive half-bridge mid point be VC/2 for the first capacitor C 1, the second capacitor C 2 again.So this square wave can be regarded as to alternation square wave, on square wave, edge is: [pressure drop in saturated tube voltage drop+the second resistance R 2 of VC/2-(the first switching tube Q1), under square wave, edge is: [(pressure drop in saturated tube voltage drop+four resistance R 4 of second switch pipe Q2)-VC/2], this square-wave voltage is through common mode inductance L, the series connection effect filtering of the 3rd capacitor C 3, its waveform approaches sinusoidal wave, because frequency approaches series resonance frequency, in the 3rd capacitor C 3, produce very high starting resistor, lamp is lighted.Lighting rear fluorescent tube 4 can considered equivalents resistance.Fluorescent tube 4 equivalent resistances are determined by fluorescent tube 4 voltages and fluorescent tube 4 electric currents.
Compared with prior art, the method for designing of device for restraining electromagnetic interference of the present invention, lighting and device for restraining electromagnetic interference, by the cooperation of safety electric capacity, common mode choke coil and differential mode choking-winding, can effectively suppress electromagnetic interference, reduce cost low, and volume is little, use more convenient.
The foregoing is only better possible embodiments of the present invention, not limit the scope of the invention.The equivalent structure that all utilizations specification of the present invention and accompanying drawing content have been done changes, and is all included in protection scope of the present invention.
Claims (8)
1. a device for restraining electromagnetic interference, is characterized in that, it comprises first input end, the second input, the first output and the second output, and the first input end of described device for restraining electromagnetic interference is connected power supply with the second input, and it also comprises:
Common-mode signal suppresses module, and it comprises:
Common mode choke coil, it comprises first input end, the second input, the first output and the second output, the first input end of described common mode choke coil connects the first input end of described device for restraining electromagnetic interference, and the second input of described common mode choke coil connects the second input of described device for restraining electromagnetic interference;
The first safety electric capacity, described the first safety electric capacity is connected between the first input end and the second input of described common mode choke coil;
The second safety electric capacity, described the second safety electric capacity is connected between first output and ground of described common mode choke coil; And
The 3rd safety electric capacity, described the 3rd safety electric capacity is connected between second output and ground of described common mode choke coil; And
Difference mode signal suppresses module, and it comprises:
The first differential mode choking-winding, the input of described the first differential mode choking-winding connects the first output of described common mode choke coil, and the output of described the first differential mode choking-winding connects the first output of described device for restraining electromagnetic interference;
The second differential mode choking-winding, the input of described the second differential mode choking-winding connects the second output of described common mode choke coil, and the output of described the second differential mode choking-winding connects the second output of described device for restraining electromagnetic interference;
The 4th safety electric capacity, described the 4th safety electric capacity is connected between the input of described the first differential mode choking-winding and the input of the second differential mode choking-winding;
The 5th safety electric capacity, described the 5th safety electric capacity is connected between first output and ground of described device for restraining electromagnetic interference; And
The 6th safety electric capacity, described the 6th safety electric capacity is connected between second output and ground of described device for restraining electromagnetic interference.
2. device for restraining electromagnetic interference as claimed in claim 1, is characterized in that, described the first safety electric capacity and the 4th safety electric capacity are μ F levels, and described the second safety electric capacity, the 3rd safety electric capacity, the 5th safety electric capacity and the 6th safety electric capacity are nF levels.
3. a Switching Power Supply, is characterized in that, comprises device for restraining electromagnetic interference as described in claim 1 to 2 any one.
4. a lighting, it is characterized in that, comprise: fluorescent tube, startup module, driver module and the device for restraining electromagnetic interference as described in claim 1 to 2 any one, described device for restraining electromagnetic interference connects described startup module, described startup module connects described driver module, and described driver module connects described fluorescent tube.
5. lighting as claimed in claim 4, it is characterized in that, described driver module comprises the first switching tube, the first inductance, the first resistance, the second resistance, second switch pipe, the 3rd resistance, the 4th resistance, the second inductance, common mode inductance, the 3rd inductance, the first electric capacity, the second electric capacity and the 3rd electric capacity, and described fluorescent tube comprises first end, the second end, the 3rd end and the 4th end;
The input of described the first switching tube connects the first output of described device for restraining electromagnetic interference, the control end of described the first switching tube connects the one end that connects described the first inductance after described the first resistance, the output of described the first switching tube connects the other end that connects described the first inductance after described the second resistance, the input of described the first switching tube connects ground connection after described the first electric capacity and the second electric capacity successively, the junction of described the first electric capacity and the second electric capacity connects the 4th end of described fluorescent tube, and described the 3rd electric capacity connects the second end and the 3rd end of described fluorescent tube;
The input of described second switch pipe connects the other end of described the first inductance, the input of described second switch pipe connects the first end that connects described fluorescent tube after described the 3rd inductance and common mode inductance successively, the control end of described second switch pipe connects ground connection after described the 3rd resistance and the second inductance successively, and the output of described second switch pipe connects ground connection after described the 4th resistance.
6. lighting as claimed in claim 5, is characterized in that, described the first switching tube and second switch pipe are triode.
7. lighting as claimed in claim 5, is characterized in that, described the first switching tube and second switch pipe are metal-oxide-semiconductor.
8. lighting as claimed in claim 4, it is characterized in that, described startup module comprises the 5th resistance, bidirectional triode thyristor and the 4th electric capacity, described the 5th resistance and the 4th capacitances in series are between first output and the second output of described device for restraining electromagnetic interference, one end of described bidirectional triode thyristor connects the junction of described the 5th resistance and described the 4th electric capacity, and the other end of described bidirectional triode thyristor connects described driver module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310066592.2A CN104022638A (en) | 2013-03-01 | 2013-03-01 | Electromagnetic interference suppression device, switching power supply and illuminating lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310066592.2A CN104022638A (en) | 2013-03-01 | 2013-03-01 | Electromagnetic interference suppression device, switching power supply and illuminating lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104022638A true CN104022638A (en) | 2014-09-03 |
Family
ID=51439253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310066592.2A Pending CN104022638A (en) | 2013-03-01 | 2013-03-01 | Electromagnetic interference suppression device, switching power supply and illuminating lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104022638A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4523131A (en) * | 1982-12-10 | 1985-06-11 | Honeywell Inc. | Dimmable electronic gas discharge lamp ballast |
| CN202005052U (en) * | 2011-02-18 | 2011-10-05 | 佛山市新信德节能环保投资管理有限公司 | Novel efficient electrical ballast |
| CN202135387U (en) * | 2011-06-23 | 2012-02-01 | 常州绿脉电器有限公司 | Novel environment-friendly and efficient electronic ballast |
-
2013
- 2013-03-01 CN CN201310066592.2A patent/CN104022638A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4523131A (en) * | 1982-12-10 | 1985-06-11 | Honeywell Inc. | Dimmable electronic gas discharge lamp ballast |
| CN202005052U (en) * | 2011-02-18 | 2011-10-05 | 佛山市新信德节能环保投资管理有限公司 | Novel efficient electrical ballast |
| CN202135387U (en) * | 2011-06-23 | 2012-02-01 | 常州绿脉电器有限公司 | Novel environment-friendly and efficient electronic ballast |
Non-Patent Citations (1)
| Title |
|---|
| 郭银景，吕文红，唐富华，杨阳: "《电磁兼容原理及应用教程》", 30 April 2004, article "电磁兼容原理及应用教程", pages: 158-160 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102082526B (en) | Self-exited push-pull converter | |
| CN105592598B (en) | High Power Factor, the LED drive circuit without stroboscopic | |
| CN104684155B (en) | LED drive power light adjusting circuit and lamps and lanterns | |
| CN104135794A (en) | Driving circuit of LED (Light Emitting Diode), and display device | |
| CN102548095A (en) | Lamp and driving circuit thereof | |
| CN104300794A (en) | Improved circuit of high-frequency switching power source | |
| CN205546073U (en) | There is not stroboscopic LED drive circuit | |
| CN203734894U (en) | LED drive circuit | |
| CN103151000B (en) | Backlight driving circuit and driving method thereof and liquid crystal display device | |
| CN105743331A (en) | Switching tube driving circuit for dual-tube flyback topological switch power supply | |
| CN210014402U (en) | Control circuit of electromagnetic heating appliance and electromagnetic heating appliance | |
| CN103200725B (en) | Piezo-electric resonance type LED driving circuit | |
| CN204243917U (en) | Based on the device of the magnetic coupling resonance wireless energy transfer of repeat circuit | |
| CN104022638A (en) | Electromagnetic interference suppression device, switching power supply and illuminating lamp | |
| CN103066850B (en) | Isolated booster circuit, backlight module and liquid crystal indicator | |
| CN102484932A (en) | Circuit for converting DC into AC pulsed voltage | |
| CN104467442A (en) | Double-input isolation power circuit | |
| CN203606422U (en) | Zero-crossing detection circuit | |
| CN206294081U (en) | A kind of BMS insulating power supplies circuit | |
| CN103236601B (en) | Wiring terminal with indicator | |
| CN204721677U (en) | A kind of LED drive power circuit | |
| CN106160025B (en) | A kind of wireless power transmitter | |
| CN104022649A (en) | 110V/220V dual-purpose power supply device and illuminating lamp | |
| CN206743594U (en) | Led drive circuit | |
| CN204616174U (en) | A kind of π type filter circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140903 |