CN102497705B - Lamp energy conservation control method and energy-conservation circuit thereof - Google Patents
Lamp energy conservation control method and energy-conservation circuit thereof Download PDFInfo
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- CN102497705B CN102497705B CN201110420888.0A CN201110420888A CN102497705B CN 102497705 B CN102497705 B CN 102497705B CN 201110420888 A CN201110420888 A CN 201110420888A CN 102497705 B CN102497705 B CN 102497705B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention relates to a lamp energy conservation control method and an energy-conservation circuit thereof. The lamp energy conservation control method includes the following steps: 1) inputting variable external voltage; 2) converting the external voltages acquired in the step 1) into constant-frequency signals F1; 3) converting the constant-frequency signals into circuit load frequency signals F2; and 4) adjusting load power P according to the circuit load frequency signal F2. By the aid of the lamp energy conservation control method and the energy-conservation circuit thereof, lamps are controllable in working process, high in intelligent degree, evident in energy-conservation effect and long in service lives.
Description
Technical field
The invention belongs to electricity and control field, relate to a kind of energy-saving circuit, relate in particular to a kind of energy-saving control method and energy-saving circuit thereof of lighting.
Background technology
In actual applications, for the various situations that occur in road lighting, such as pedestrian on road after midnight and vehicle flowrate, reduce when not needing to carry out whole step illumination or occurring the weather condition of the low visibility such as sleet dense fog, all need road lighting to adjust accordingly, carry out additional illumination or suppress illumination, these control methods to lighting even circuit have very high requirement.At present seen various lightings on the market, are all to implement unified brightness, can not realize as required and regulating, and intelligent degree is low, and uncontrollability is strong, can not realize energy-conservation object.Under unified brightness, make can not reach the time limit of regulation and scrap the useful life of lighting, waste rate is high.
Summary of the invention
In order to solve the above-mentioned technical problem existing in background technology, the invention provides that a kind of course of work is controlled, degree of intelligence is high, energy-saving effect is obvious and lighting energy-saving control method and the energy-saving circuit thereof of long service life.
Technical solution of the present invention is: the invention provides a kind of lighting energy-saving control method, its special character is: described lighting energy-saving control method comprises the following steps:
1) external voltage that input changes;
2) by step 1) resulting external voltage is converted into frequency fixed signal F1;
3) frequency fixed signal F1 is converted into circuit load frequency signal F2;
4) according to circuit load frequency signal F2 regulating load power P.
Upper step 2) specific implementation is:
2.1) external voltage of variation is converted to internal voltage references amount, described internal voltage references amount is stationary value;
2.2) by load circuit, produced the sawtooth waveforms of certain frequency;
2.3) by step 2.2) sawtooth waveforms and the step 2.1 that produce) resulting internal voltage references amount compares; If step 2.2) sawtooth waveforms producing is higher than step 2.1) during resulting internal voltage references amount, output HIGH voltage amount; If step 2.2) sawtooth waveforms producing is lower than step 2.1) during resulting internal voltage references amount, output LOW voltage amount;
2.4) by step 2.3) in the high voltage amount that produces and low-voltage amount alternately change and produce frequency fixed signal F1.
Above-mentioned steps 3) specific implementation is:
3.1) frequency fixed signal F1 is transformed to sampled voltage signal U by integrating circuit;
3.2) by step 3.1) resulting sampled voltage signal U is converted into circuit load frequency signal F2.
Above-mentioned steps 3.1) specific implementation is:
3.1.1) obtain the duty ratio D of frequency fixed signal;
3.1.2) by step 3.1.1) the duty ratio D of resulting frequency fixed signal is by integrating circuit calculating sampling voltage signal U; Described integrating circuit comprises formula U=5 * (D
0.5).
Above-mentioned steps 3.2) specific implementation is: by step 3.1) resulting sampled voltage signal U calculates and is output as the circuit load frequency signal F2 of certain frequency waveform by voltage controlled oscillator; Described account form is:
F2＝k×U+F1
Wherein:
K is voltage-controlled coefficient;
U is step 3.1) resulting sampled voltage signal;
F1 is the minimum output frequency that voltage controlled oscillator and peripheral circuit arrange.
Above-mentioned steps 4) specific implementation is:
Circuit load frequency signal F2 flows inductance dividing potential drop regulating load power P by strategic point; Its computing formula is:
P＝[RL×V
BUS/(RL+2π×F2×L)]
2/RL
Wherein:
V
bUSit is the DC bus voltage that load circuit provides;
RL is the resistance of load;
L is the inductance value of choke induction;
F2 is circuit load frequency signal.
An energy-saving circuit based on lighting energy-saving control method, its special character is: described energy-saving circuit comprises voltage input end, light adjusting circuit signal input unit, signal conversion unit, control signal output unit and bearing power regulon; Described voltage input end is successively by light adjusting circuit signal input unit, signal conversion unit and control signal output unit access bearing power regulon.
Above-mentioned voltage input end comprises that the voltage range of input is the outside DC voltage input end of 0-10V and the frequency voltage signal input being produced by light adjusting circuit; Described light adjusting circuit signal input unit comprises voltage comparator; Described external voltage input and frequency voltage signal input access respectively voltage comparator.
Above-mentioned signal conversion unit comprises first integral circuit and the first microcontroller; Described light adjusting circuit signal input unit accesses the first microcontroller by first integral circuit; Described first integral circuit comprises the first electric capacity and the first resistance; One end ground connection of described the first electric capacity, the other end afterwards jointly access first microcontroller in parallel with the first resistance and light adjusting circuit signal input unit; Described the first microcontroller is the single-chip microcomputer of PIC16 series; The preferred PIC16F886 single-chip microcomputer of described the first microcontroller.
Above-mentioned control signal output unit comprises second integral circuit and the second microcontroller; Described the second microcontroller comprises voltage controlled oscillator; Described signal conversion unit accesses the second microcontroller by second integral circuit; Described second integral circuit comprises the second electric capacity and the second resistance; Described signal conversion unit is connected with the second microcontroller by the second resistance; One end ground connection of described the second electric capacity, accesses the second microcontroller after the other end is in parallel with the second resistance; Described the second microcontroller is MC14046B chip; Described bearing power regulon comprises choke induction; Described voltage controlled oscillator access choke induction.
Advantage of the present invention is:
The invention provides a kind of lighting energy-saving control method and energy-saving circuit thereof, due to the control of microcontroller internal processes, can make the power of lamp change within the scope of 50%～100% rated power.The digital dimming function of 0～10V, the illumination that can realize in flat-out 50%～100% scope of lamp is controlled.On the one hand, lamp can change according to external circumstances by devices such as external day optical inductors, automatically realizes light modulation, regulates illumination.On the other hand, also can networking, realize unified control, by central integrated control system, allotment integral illumination or adjust the parameter of every lamp.This dimmer design that can freely configure, makes in road lighting application, in illumination, can realize low illuminance and control especially in the second half of the night, has both met actual illumination demand, has saved again electric energy.Be suitable for the illumination in the places such as supermarket, market, parking lot, road.This specification electronic ballast system is embedded in software, has improved efficiency, reliability, has reduced volume, has saved cost.The light modulation of gamut analog or digital.Obvious energy conservation.External sensing assembling, every lamp can be realized light modulation automatically.For the intellectuality of road lighting, control possibility is provided.Also for intelligent building provides reference.
Accompanying drawing explanation
Fig. 1 is that external voltage amount U of the present invention is to the circuit diagram of internal frequency amount F conversion;
Fig. 2 is adjustment load power output signaling conversion circuit of the present invention and microcontroller receiving circuit figure;
Fig. 3 is second integral circuit diagram of the present invention.
Embodiment
The invention provides a kind of lighting energy-saving control method, the method comprises the following steps:
1) external voltage that input changes, the input range of this voltage is 0-10V;
2) by step 1) resulting external voltage is converted into frequency fixed signal F1;
2.1) external voltage of variation is converted to internal voltage references amount, internal voltage references amount is stationary value; When external input voltage is constant, the internal voltage references amount converting to is only constant;
2.2) by light adjusting circuit, produced the sawtooth waveforms of certain frequency;
2.3) by step 2.2) sawtooth waveforms and the step 2.1 that produce) resulting internal voltage references amount compares; If step 2.2) sawtooth waveforms producing is higher than step 2.1) during resulting internal voltage references amount, output HIGH voltage amount; If step 2.2) sawtooth waveforms producing is lower than step 2.1) during resulting internal voltage references amount, output LOW voltage amount;
2.4) by step 2.3) in the high voltage amount that produces and low-voltage amount alternately change and produce frequency fixed signal F1.
3) frequency fixed signal F1 is converted into circuit load frequency signal F2;
3.1) frequency fixed signal F1 is transformed to sampled voltage signal U by integrating circuit;
3.1.1) obtain the duty ratio D of frequency fixed signal;
3.1.2) by step 3.1.1) the duty ratio D of resulting frequency fixed signal is by integrating circuit calculating sampling voltage signal U; Integrating circuit comprises formula U=5 * (D
0.5).
3.2) by step 3.1) resulting sampled voltage signal U is converted into circuit load frequency signal F2.
By step 3.1) resulting sampled voltage signal U calculates and is output as the circuit load frequency signal F2 of certain frequency waveform by voltage controlled oscillator; Described account form is:
F2＝k×U+F1
Wherein:
K is voltage-controlled coefficient;
U is step 3.1) resulting sampled voltage signal;
F1 is the minimum output frequency that voltage controlled oscillator and peripheral circuit arrange.
4) according to circuit load frequency signal F2 regulating load power P.
Circuit load frequency signal F2 flows inductance dividing potential drop regulating load power P by strategic point; Its computing formula is:
P＝[RL×V
BUS/(RL+2π×F2×L)]
2/RL
Wherein:
V
bUSit is the DC bus voltage that load circuit provides;
RL is the resistance of load;
L is the inductance value of choke induction;
F2 is circuit load frequency signal.
The present invention is when proposing above-mentioned power-economizing method, a kind of energy-saving circuit based on lighting energy-saving control method is also provided, and on this, energy-saving circuit comprises voltage input end, light adjusting circuit signal input unit, signal conversion unit, control signal output unit and bearing power regulon; Voltage input end is successively by light adjusting circuit signal input unit, signal conversion unit and control signal output unit access bearing power regulon.
Voltage input end comprises that the voltage range of input is the outside DC voltage input end of 0-10V and the frequency voltage signal input being produced by light adjusting circuit; Light adjusting circuit signal input unit comprises voltage comparator; External voltage input and frequency voltage signal input access respectively voltage comparator.
Signal conversion unit comprises first integral circuit and the first microcontroller; Light adjusting circuit signal input unit accesses the first microcontroller by first integral circuit; First integral circuit comprises the first electric capacity and the first resistance; One end ground connection of the first electric capacity, the other end afterwards jointly access first microcontroller in parallel with the first resistance and light adjusting circuit signal input unit; Described the first microcontroller is the single-chip microcomputer of PIC16 series; The preferred PIC16F886 single-chip microcomputer of the first microcontroller.
Control signal output unit comprises second integral circuit and the second microcontroller; Described the second microcontroller comprises that output signal is the voltage controlled oscillator of oscillator signal; Signal conversion unit accesses the second microcontroller by second integral circuit and accesses; Second integral circuit comprises the second electric capacity and the second resistance; Signal conversion unit is connected with the second microcontroller by the second resistance; One end ground connection of the second electric capacity, accesses the second microcontroller after the other end is in parallel with the second resistance; The second microcontroller is MC14046B chip; Bearing power regulon comprises choke induction; Output frequency, i.e. loaded work piece frequency access choke induction.
The present invention, in flat-out 50%～100% scope of illumination, can realize FR 0～10V digital dimming.Further improved energy-saving effect.For realizing the light adjusting circuit of energy-saving effect, it is mainly to discharge and recharge the cycle by changing RC, after sampling, adjusts the power output of lamp by microprocessor controller.
The present invention adopts following specific embodiment, and the present invention will be described in detail:
With reference to circuit diagram 1, be that the present invention is converted into resulting external voltage the circuit diagram of frequency fixed signal; Its circuit working process can be described as:
1,, after circuit powers on, the voltage at Bin-end place is owing to being comprised of resistance series connection dividing potential drop, so the voltage constant of locating.The voltage at Bin+ end place is comprised of R3, R12, R7, C5, the voltage at sampling R7 end place.Due to the charging process of electric capacity, the voltage that Bin+ place gathers is a rising process.
When 2, the voltage at Bin+ place is not also greater than the voltage at Bin-place, after being processed by voltage comparator U2, BOUT place output low level.Now Q2, Q3 triode are in off state, and the voltage at Ain+ place is unaffected.When the voltage at Bin+ place rises to the voltage that is greater than Bin-place, BOUT exports high level.Now Q2 conducting, and then make Q3 conducting, after Q3 conducting, the voltage at A+ place is pulled down to ground.Meanwhile, the voltage at B+ place is also dragged down.
3, when the voltage at B+ place is pulled down to the voltage that is less than B-place, after voltage comparator U2 processes, BOUT output LOW voltage, now Q2, Q3 turn-off, the voltage recovery at Bin+ place, the voltage recovery at Ain+ place.
4, the output B of comparator B
oUT, the change in voltage at Bin+ place, repeats above-mentioned 2,3 processes.
5, the voltage at Ain-place is controlled by external dimmer voltage.
6, the change in voltage at the voltage at Ain+ place and Bin+ place is almost synchronous, changes the same Bin+ of waveform.When the voltage at Ain+ place is greater than Ain-, AOUT exports high level, and light coupling device turn-offs; When Ain+ is subject to the impact of comparator B, voltage drop, while being less than A-place voltage, AOUT output low level, light coupling device is open-minded.
7, light coupling device is opened and the time of turn-offing, and the cycle control signal that forms light adjusting circuit feeds back to the dim signal of microcontroller.After processing by sampled signal, by microprocessor identification, processing, control load power changes.
By external voltage amount U, to the operation principle of internal frequency amount F, be: from
outsidevoltage U is to the transformation of internal frequency amount F.By outside voltage signal amount, conversion can be the frequency signal amount that internal circuit is used.Outside input 0～10V voltage; The frequency voltage signal that circuit produces; Voltage comparator compares; Output frequency signal.
By external voltage, be converted to the inner frequency signal amount F2 using (is the output signal of external voltage converting unit herein, frequency signal during final load work not, was called F2 for the serrated signal frequency of discrimination circuit self arranges with output signal frequency at that time in the drawings) between the available following table of relation represent:
Light adjusting circuit and micro-as follows by the control model between device processed:
External 0～10V digital voltage module; Light adjusting circuit; Signal input; Signaling conversion circuit; Microcontroller; Control signal output.The periodic signal of light adjusting circuit, is transferred to after signaling conversion circuit, and it becomes voltage signal, finally by after microcontroller sampling processing, adjusts load power output signaling conversion circuit and microcontroller receiving circuit as Fig. 2:
The output signal of light adjusting circuit is added to capacitor C 47 places.Supply power voltage is by resistance R 52, C47 ground connection.Due to the signal at light adjusting circuit place, when opening, electric current is to flow to light adjusting circuit from 14 pins of microcontroller; When turn-offing, electric current is provided by power supply, through capacitor C 47, flows to ground.
By the integrating circuit being formed by R52 and C47, can obtain at 14 pin of PIC16F886 single-chip microcomputer an effective value voltage.The effective value computing formula of this voltage is as follows:
U=5 * (D
0.5) ... ... formula 1
Herein, D is the duty ratio of frequency fixed signal F2 signal.
The output signal of light adjusting circuit is the signal that one-period is opened, turn-offed, and this signal causes current direction generating period in capacitor C 47.Finally 14 pin at microcontroller obtain a metastable voltage effective value signal.This signal is output after microcontroller is processed, and the power of regulating load changes.The voltage that the cycle of this periodic signal is exported by outside determines.
Referring to Fig. 3, in frequency-sweeping igniting circuit, the MC14046B using is trivial phase ring core sheet.In this circuit, use its voltage controlled oscillator function, realization is from the F (fixed frequency signal) of PIC16 series monolithic output, after the integrating circuit forming by resistance R 68 and capacitor C 12, by MC14046B output, be used for the F in the F ' (service frequency signal step 3) of circuit working) wherein, 13 pin of the PIC16F886 single-chip microcomputer of applying in this circuit, export a pwm signal that amplitude is 5V.Its frequency is fixed, but duty ratio is by maximum 1 linear change to 0 in ignition process.Final frequency of 4 pin outputs by MC14046B chip is the change frequency to 61KHZ by 355KHZ.In this frequency range, lead the resonance point of looking for circuit, to reach the object that a most suitable ignition voltage is provided.
Its operation principle can be reduced to: PIC16F series monolithic output pwm signal (fixed frequency signal); RC integrating circuit changes into voltage signal (sampled voltage amount) by pwm signal; Voltage controlled oscillator output certain frequency waveform in MC14046B.
The control voltage input that pwm signal is converted to; Voltage controlled oscillator; Output frequency signal F2, oscillator source frequency signal f1;
Its linear relation is: F2=k * U+F1.... ... ... ... formula 2
K is voltage-controlled coefficient, and F1 is the minimum output frequency (having introduction in chip data) that MC14046B and peripheral circuit arrange.
In this circuit, its pwm signal by chip to the linear relation of output services frequency signal is:
F2=45 * V * (D
0.5)+61 final result is KHZ ... ... ... formula 3
Wherein 45 is voltage-controlled coefficient.V is the amplitude of PIC16F family chip output pwm signal, and D is the duty ratio of pwm signal (drawing corresponding value after by sequential operation by PIC control chip inside) for this reason.61KHZ is the minimum output frequency that in this circuit, peripheral circuit and MC14046B chip form.
PIC16F series monolithic output pwm signal Duty ratio control:
In PIC16F series monolithic, be all provided with special pin position for output pwm signal.And single-chip microcomputer inside is provided with A/D (mould, number conversion) conversion pin, has reached the resolution of 10.For the level of digital circuit 5V, its minimum differntial pressure that can identify is: 5/ (2
10)=0.004828125, almost can realize by analog quantity completely after digital quantity, and reduction is without distortion gone back.
In this circuit, the voltage signal that PIC single-chip microcomputer samples 14 pin, to the duty ratio of regulation output pwm signal, is, after calculating accordingly by the program of inside circuit, to control processing.
In this circuit, its computing formula of controlling pwm signal duty ratio D is:
D=[(2+0.22V)/5]
2... ... ... ... formula 4
In formula, V is the sampled voltage signal of PIC16F886 single-chip microcomputer 14 pin in circuit.It is that the frequency signal exported by light adjusting circuit plate is by being undertaken drawing after integration by R52 and C47.Computational process is shown in " formula 1 " in detail
The regulative mode of the last regulating load power of operating frequency is:
Its interactively formula is: P (load)=U2^2/RL ... ... ... formula 5
U2=U1 * RL/ (RL+2 π * F2 * L) wherein ... ... ... ... formula 6
RL is the resistance of load, the inductance value that L is choke induction, and U1 is the DC bus voltage that load circuit provides.
Whole by light adjusting circuit, will after external voltage signal conversion, process to PIC16F series monolithic, then result is converted to loaded work piece frequency, the process that end reaction is bearing power.Complete external voltage signal conversion; RC integrating circuit; PIC16 series monolithic signal is processed rear output pwm signal; RC integrating circuit; Frequency control signal output; Regulating load voltage, changes power.
Claims (8)
1. a lighting energy-saving control method, is characterized in that: described lighting energy-saving control method comprises the following steps:
1) external voltage that input changes;
2) the resulting external voltage of step 1) is converted into frequency fixed signal F1;
3) frequency fixed signal F1 is converted into circuit load frequency signal F2;
3.1) frequency fixed signal F1 is transformed to sampled voltage signal U by integrating circuit:
3.1.1) obtain the duty ratio D of frequency fixed signal;
3.1.2) by step 3.1.1) the duty ratio D of resulting frequency fixed signal is by integrating circuit calculating sampling voltage signal U; Described integrating circuit comprises formula U=5 * (D
0.5);
3.2) by step 3.1) resulting sampled voltage signal U is converted into circuit load frequency signal F2;
4) according to circuit load frequency signal F2 regulating load power P.
2. lighting energy-saving control method according to claim 1, is characterized in that: specific implementation described step 2) is:
2.1) external voltage of variation is converted to internal voltage references amount, described internal voltage references amount is stationary value;
2.2) by load circuit, produced the sawtooth waveforms of certain frequency;
2.3) by step 2.2) sawtooth waveforms and the step 2.1 that produce) resulting internal voltage references amount compares; If step 2.2) sawtooth waveforms producing is higher than step 2.1) during resulting internal voltage references amount, output HIGH voltage amount; If step 2.2) sawtooth waveforms producing is lower than step 2.1) during resulting internal voltage references amount, output LOW voltage amount;
2.4) by step 2.3) in the high voltage amount that produces and low-voltage amount alternately change and produce frequency fixed signal F1.
3. lighting energy-saving control method according to claim 1 and 2, is characterized in that: specific implementation described step 3.2) is: by step 3.1) resulting sampled voltage signal U calculates and is output as the circuit load frequency signal F2 of certain frequency waveform by voltage controlled oscillator; Described account form is:
F2=k×U+F1
Wherein:
K is voltage-controlled coefficient;
U is step 3.1) resulting sampled voltage signal;
F1 is the minimum output frequency that voltage controlled oscillator and peripheral circuit arrange.
4. lighting energy-saving control method according to claim 3, is characterized in that: the specific implementation of described step 4) is:
Circuit load frequency signal F2 is by choke induction dividing potential drop regulating load power P; Its computing formula is:
P=[RL×V
BUS/(RL+2π×F2×L)]
2/RL
Wherein:
V
bUSit is the DC bus voltage that load circuit provides;
RL is the resistance of load;
L is the inductance value of choke induction;
F2 is circuit load frequency signal.
5. an energy-saving circuit for the lighting energy-saving control method based on described in the arbitrary claim of claim 1-4, is characterized in that: described energy-saving circuit comprises voltage input end, light adjusting circuit signal input unit, signal conversion unit, control signal output unit and bearing power regulon; Described voltage input end is successively by light adjusting circuit signal input unit, signal conversion unit and control signal output unit access bearing power regulon; Described signal conversion unit comprises first integral circuit and the first microcontroller; Described light adjusting circuit signal input unit accesses the first microcontroller by first integral circuit; Described first integral circuit comprises the first electric capacity and the first resistance; One end ground connection of described the first electric capacity, the other end afterwards jointly access first microcontroller in parallel with the first resistance and light adjusting circuit signal input unit; Described the first microcontroller is the single-chip microcomputer of PIC16 series.
6. energy-saving circuit according to claim 5, is characterized in that: described the first microcontroller is PIC16F886 single-chip microcomputer.
7. energy-saving circuit according to claim 6, is characterized in that: described voltage input end comprises that the voltage range of input is the outside DC voltage input end of 0-10V and the frequency voltage signal input being produced by load circuit; Described light adjusting circuit signal input unit comprises voltage comparator; Described external voltage input and frequency voltage signal input access respectively voltage comparator.
8. energy-saving circuit according to claim 7, is characterized in that: described control signal output unit comprises second integral circuit and the second microcontroller; Described the second microcontroller comprises voltage controlled oscillator; Described signal conversion unit accesses the second microcontroller by second integral circuit; Described second integral circuit comprises the second electric capacity and the second resistance; Described signal conversion unit is connected with the second microcontroller by the second resistance; One end ground connection of described the second electric capacity, accesses the second microcontroller after the other end is in parallel with the second resistance; Described the second microcontroller is MC14046B chip; Described bearing power regulon comprises choke induction; Described voltage controlled oscillator access choke induction.
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| US20100164406A1 (en) * | 2008-07-25 | 2010-07-01 | Kost Michael A | Switching power converter control with triac-based leading edge dimmer compatibility |
| CN101848588A (en) * | 2010-06-12 | 2010-09-29 | 浙江大学 | Control method of full digital high-power metal halide lamp electronic ballast |
| CN102036458A (en) * | 2009-09-30 | 2011-04-27 | 塞瑞斯逻辑公司 | Phase control dimming compatible lighting systems |
-
2011
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1340285A (en) * | 1999-12-14 | 2002-03-13 | 皇家菲利浦电子有限公司 | Digital lamp ballast |
| US20070120497A1 (en) * | 2005-11-30 | 2007-05-31 | Princeton Technology Corporation | Dimmer control system and controlling method thereof |
| US20080224636A1 (en) * | 2007-03-12 | 2008-09-18 | Melanson John L | Power control system for current regulated light sources |
| US20080272744A1 (en) * | 2007-05-02 | 2008-11-06 | Cirrus Logic, Inc. | Power control system using a nonlinear delta-sigma modulator with nonlinear power conversion process modeling |
| CN201153343Y (en) * | 2007-08-22 | 2008-11-19 | 北京市中盛飞朗科技发展有限公司 | HID electronic ballast constant power control system controlled by microcontroller |
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| CN101848588A (en) * | 2010-06-12 | 2010-09-29 | 浙江大学 | Control method of full digital high-power metal halide lamp electronic ballast |
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