CN104470160A - Self-adaption efficient LED driving power supply - Google Patents
Self-adaption efficient LED driving power supply Download PDFInfo
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- CN104470160A CN104470160A CN201510005160.XA CN201510005160A CN104470160A CN 104470160 A CN104470160 A CN 104470160A CN 201510005160 A CN201510005160 A CN 201510005160A CN 104470160 A CN104470160 A CN 104470160A
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Abstract
The invention discloses a self-adaption efficient LED driving power supply. An independent circulating control unit is arranged so that voltage precision can be controlled within an ultra-small range, and voltage distortion can be effectively suppressed; due to the arrangement of a current stabilizing control unit, current can be maintained to be linearly continuous; the anti-interference capacity of a whole circuit is high, output is stable, and the electric energy utilization rate is high.
Description
Technical field
The present invention relates to field of LED drive, particularly relate to a kind of self-adapted high-efficient LED drive power.
Background technology
Along with the development of human civilization, lighting apparatus enters in daily life already, traditional lighting source mainly contains incandescent lamp, fluorescent lamp, electricity-saving lamp etc., this type of lighting source technology comparative maturity all, but this type of lighting source exists, and the life-span is short, energy consumption is high, luminous efficiency is low, even some also can bring pollution, sending out a novel illumination light source is future trend.
LED is as new type light source, its main advantage compared with conventional light source has: volume is little, power consumption is little, it is little to generate heat, life-span length, fast response time, safety, environmental protection, current LED has not only been successfully applied to some general occasion illumination, and the demand that its special advantage is as high in luminous intensity, long service life, environmental protection can meet special occasions, along with the exhaustion day by day of resource, LED illumination will replace the lighting source that traditional lighting becomes main flow.
Current LED mainly adopts Alternating Current Power Supply, obtains constant electric current and voltage power to LED through converter, however this mode not only power factor (PF) is lower, and the distortion that can not effectively suppress input to bring; And light modulation is mainly by changing the electric current flowing through LED, and under different current conditions, luminous wavelength is different, and affect luminous efficiency, therefore such circuit exists the shortcomings such as antijamming capability is weak, output stability is poor, output accuracy is on the low side, power factor (PF) is low.
Summary of the invention
The object of the invention is to be achieved through the following technical solutions.
According to the embodiment of the present invention, propose a kind of self-adapted high-efficient LED drive power, described LED drive power comprises: EMI filter unit, DC converting unit, switch transition unit, driving switch power subsystem, independent loops control unit, analog photoelectricity isolated location, stabilized current power supply output unit, current stabilization control unit, pulse-width modulation light regulon; Wherein,
Described EMI filter unit, DC converting unit, switch transition unit connect successively, and be connected to stabilized current power supply output unit, the output of switch transition unit connects driving switch power subsystem, the output of driving switch power subsystem connects independent loops control unit, analog photoelectricity isolated location, current stabilization control unit, pulse-width modulation light regulon respectively, the output of analog photoelectricity isolated location is by independent loops control unit connecting valve converting unit, and pulse-width modulation light regulon is connected to stabilized current power supply output unit by current stabilization control unit, alternating current outputs to switch transition unit after EMI filter unit and DC converting unit, the output voltage detected is passed through analog photoelectricity Isolation input to independent loops control unit by analog photoelectricity isolated location, driving switch power subsystem gives independent loops control unit respectively, analog photoelectricity isolated location, current stabilization control unit, pulse-width modulation light regulon is powered, independent loops control unit control switch converting unit exports expects voltage, current stabilization control unit controls stabilized current power supply output unit and exports expectation electric current, pulse-width modulation light regulon carries out Dimming operation by current stabilization control unit to described LED.
According to the embodiment of the present invention, input AC 220V voltage is by accessing described DC converting unit after EMI filtering, described DC converting unit is by DC converting bridge D2, diode D3, inductance L 2, electric capacity C4, C5 forms, DC converting bridge D2 output is connected to diode D3 and is connected to absorbing circuit by inductance L 2, electric capacity C4, C5 one end receives the left and right end of inductance L 2 respectively, other end ground connection GND1, absorbing circuit is by resistance R3, electric capacity C6, diode D6 forms, resistance R3 connects with diode D6 with after electric capacity C6 parallel connection again, absorbing circuit is parallel to the two ends of transformer T1 voltage input side again, the positive pole of diode D6 is connected with break-make triode Q1 again, the other end connecting resistance R10 of break-make triode Q1, resistance R10 other end ground connection GND1.
According to the embodiment of the present invention, described driving switch power subsystem can be divided into 3 subelements, be respectively the first driving switch power supply VCC1, the second driving switch power supply VCC2, the 3rd driving switch power supply VCC3, the positive pole of diode D9 is connected with the negative pole of diode D3, the negative pole series resistance R8 of diode D9, be in series with resistance R8 after Zener diode D12 and electric capacity C9 is in parallel, the negative pole of Zener diode D12 is the first driving switch power supply VCC1 again; The positive pole of diode D8 is connected with the negative pole of diode D1, and its negative pole is connected to resistance R7, and be in series with resistance R7 after Zener diode D11 and electric capacity C8 is in parallel, the negative pole of Zener diode D11 is VCC2 again; The negative pole of diode D7 is connected with another voltage outlet side of transformer T1, its positive pole and resistance R6 are in series, be in series with resistance R6 after Zener diode D10 and electric capacity C7 is in parallel, the negative pole of Zener diode D10 is the 3rd driving switch power supply VCC3 again.
According to the embodiment of the present invention, described first driving switch power supply VCC1 is connected to the voltage of independent loops control unit with reference to end Vref after resistance R9 and R11 dividing potential drop, in independent loops control unit, the Q end of reset-set flip-flop is connected with the grid of break-make triode Q1, the IS-1 end of independent loops control unit is connected with the source electrode of break-make triode Q1, and the VC1 end of independent loops control unit is held with the VC1 of analog photoelectricity isolated location and is connected.Resistance R1 is in parallel with diode D1 again after connecting with electric capacity C1, the positive pole of diode D1 receives the voltage outlet side of transformer T1, its negative pole series inductance L1, electric capacity C2 is connected with diode D1 negative pole, its other end receives ground GND2, resistance R2, after R4 series connection is in parallel with electric capacity C3 again, one end is connected to right-hand member and the load LED+ of inductance L 1, its other end ground connection GND2, the tie point of resistance R2 and R4 is connected to the Vin end of analog photoelectricity isolated location, the negative pole of diode D5 meets load LED+, its positive pole connects the disconnected drain electrode of triode Q2 and one end of inductance L 3, the other end of inductance L 3 is connected with load LED-, the source ground GND2 of break-make triode Q2, the electric current in load is flow through in Hall current-sensing circuit CHB-1 measurement, its two ends parallel resistance R5, one end ground connection GND3 of resistance R5, the other end receives the IS-O end of current stabilization control unit, 3rd driving switch power supply VCC3 is through resistance R12, the IS-O* end of current stabilization control unit is received after R13 series connection dividing potential drop, the pulse-width modulation end of pulse-width modulation light regulon is connected with the pulse-width modulation end of current stabilization control unit, in current stabilization control unit, the collector electrode of U6 is connected to the grid of break-make triode Q2.
Self-adapted high-efficient LED drive power of the present invention, is provided with independent loops control unit, voltage accuracy can be controlled, in minimum scope, effectively can suppress voltage distortion; By arranging current stabilization control unit, electric current can be made to maintain linear continuum; Whole circuit anti-interference ability is strong, and stable output, has higher utilization rate of electrical.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Figure 1 show the self-adapted high-efficient LED drive power structural representation according to embodiment of the present invention;
Figure 2 illustrate the self-adapted high-efficient LED drive power circuit schematic diagram according to embodiment of the present invention;
Figure 3 show the independent loops control unit circuit theory diagrams according to embodiment of the present invention;
Fig. 4 illustrate the current stabilization control unit circuit theory diagrams according to embodiment of the present invention;
Fig. 5 illustrate the EMI filter unit circuit theory diagrams according to embodiment of the present invention;
Figure 6 show the pulse-width modulation light regulon circuit theory diagrams according to embodiment of the present invention
Figure 7 show the analog photoelectricity isolated location circuit theory diagrams according to embodiment of the present invention.
Embodiment
Below with reference to accompanying drawings illustrative embodiments of the present disclosure is described in more detail.Although show illustrative embodiments of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the execution mode of setting forth here.On the contrary, provide these execution modes to be in order to more thoroughly the disclosure can be understood, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
According to the embodiment of the present invention, a kind of self-adapted high-efficient LED drive power is proposed, as shown in Figure 1, described LED drive power comprises: EMI filter unit, DC converting unit, switch transition unit, driving switch power subsystem, independent loops control unit, analog photoelectricity isolated location, stabilized current power supply output unit, current stabilization control unit, pulse-width modulation light regulon; Wherein,
Described EMI filter unit, DC converting unit, switch transition unit connect successively and are connected to stabilized current power supply output unit, the output of switch transition unit connects driving switch power subsystem, the output of driving switch power subsystem connects independent loops control unit, analog photoelectricity isolated location, current stabilization control unit, pulse-width modulation light regulon respectively, the output of analog photoelectricity isolated location is by independent loops control unit connecting valve converting unit, and pulse-width modulation light regulon is connected to stabilized current power supply output unit by current stabilization control unit, alternating current outputs to switch transition unit after EMI filter unit and DC converting unit, the output voltage detected is passed through analog photoelectricity Isolation input to independent loops control unit by analog photoelectricity isolated location, driving switch power subsystem gives independent loops control unit respectively, analog photoelectricity isolated location, current stabilization control unit, pulse-width modulation light regulon is powered, independent loops control unit control switch converting unit exports expects voltage, current stabilization control unit controls stabilized current power supply output unit and exports expectation electric current, pulse-width modulation light regulon carries out Dimming operation by current stabilization control unit to described LED.
As shown in Figure 2, main circuit input AC 220V voltage is by accessing described DC converting unit after EMI filtering, described DC converting unit is by DC converting bridge D2, diode D3, inductance L 2, electric capacity C4, C5 forms, DC converting unit connection is as follows, DC converting bridge D2 output is connected to diode D3 and is connected to absorbing circuit by inductance L 2, electric capacity C4, C5 one end receives the left and right end of inductance L 2 respectively, other end ground connection GND1, absorbing circuit is by resistance R3, electric capacity C6, diode D6 forms, resistance R3 connects with diode D6 with after electric capacity C6 parallel connection again, absorbing circuit is parallel to the two ends of transformer T1 voltage input side again.The positive pole of diode D6 is connected with break-make triode Q1 again, the other end connecting resistance R10 of break-make triode Q1, resistance R10 other end ground connection GND1.
Described driving switch power subsystem can be divided into 3 subelements, be respectively the first driving switch power supply VCC1, the second driving switch power supply VCC2, the 3rd driving switch power supply VCC3, the positive pole of diode D9 is connected with the negative pole of diode D3, the negative pole series resistance R8 of diode D9, be in series with resistance R8 after Zener diode D12 and electric capacity C9 is in parallel, the negative pole of Zener diode D12 is the first driving switch power supply VCC1 again; The positive pole of diode D8 is connected with the negative pole of diode D1, and its negative pole is connected to resistance R7, and be in series with resistance R7 after Zener diode D11 and electric capacity C8 is in parallel, the negative pole of Zener diode D11 is VCC2 again; The negative pole of diode D7 is connected with another voltage outlet side of transformer T1, its positive pole and resistance R6 are in series, be in series with resistance R6 after Zener diode D10 and electric capacity C7 is in parallel, the negative pole of Zener diode D10 is the 3rd driving switch power supply VCC3 again.
Described first driving switch power supply VCC1 is connected to the voltage of independent loops control unit with reference to end Vref after resistance R9 and R11 dividing potential drop, in independent loops control unit, the Q end of reset-set flip-flop is connected with the grid of break-make triode Q1, the IS-1 end of independent loops control unit is connected with the source electrode of break-make triode Q1, and the VC1 end of independent loops control unit is held with the VC1 of analog photoelectricity isolated location and is connected.Resistance R1 is in parallel with diode D1 again after connecting with electric capacity C1, the positive pole of diode D1 receives the voltage outlet side of transformer T1, its negative pole series inductance L1, electric capacity C2 is connected with diode D1 negative pole, its other end receives ground GND2, resistance R2, after R4 series connection is in parallel with electric capacity C3 again, one end is connected to right-hand member and the load LED+ of inductance L 1, its other end ground connection GND2, the tie point of resistance R2 and R4 is connected to the Vin end of analog photoelectricity isolated location, the negative pole of diode D5 meets load LED+, its positive pole connects the disconnected drain electrode of triode Q2 and one end of inductance L 3, the other end of inductance L 3 is connected with load LED-, the source ground GND2 of break-make triode Q2, the electric current in load is flow through in Hall current-sensing circuit CHB-1 measurement, its two ends parallel resistance R5, one end ground connection GND3 of resistance R5, the other end receives the IS-O end of current stabilization control unit, 3rd driving switch power supply VCC3 is through resistance R12, the IS-O* end of current stabilization control unit is received after R13 series connection dividing potential drop, the pulse-width modulation end of pulse-width modulation light regulon is connected with the pulse-width modulation end of current stabilization control unit, in current stabilization control unit, the collector electrode of U6 is connected to the grid of break-make triode Q2.
Described stabilized current power supply output unit comprises Hall current-sensing circuit CHB-25NP/SP5, break-make triode Q1, load D4, energy storage inductor L3, Schottky diode D5 form, and inductance L 3 and Schottky diode D5 are the effects playing afterflow at break-make triode Q1 blocking interval.Hall current-sensing circuit CHB-25NP/SP5 detects current precision within 0.8%, and the size accurately can measuring output current feeds back in current stabilization control unit, realizes output current and control circuit isolation simultaneously.
Described independent loops control unit comprises linear scale integral adjustment circuit, N1/N2 times amplifying circuit (N1/N2 is transformer voltage input side voltage outlet side turn ratio), adder circuit, initializing circuit, comparison circuit, RS circuits for triggering, wherein linear scale integral adjustment circuit, N1/N2 times amplifying circuit, adder circuit are by amplifier and peripheral circuit composition thereof, initializing circuit is by amplifier, reset switch and peripheral circuit and form, comparison circuit is made up of comparator, and RS circuits for triggering are made up of reset-set flip-flop and clock pulse generator.Independent loops control unit obtains reference voltage signal by electric resistance partial pressure from driving switch power subsystem.As shown in Figure 3, the voltage of independent loops control unit is connected with resistance R16 with 3 pins of amplifier U1A respectively with reference to after end Vref series resistor R18, ground connection GND1 after the other end series capacitance C10 of resistance R16, 2 pins of amplifier U1A are received after feedback voltage V C1 series resistor R19, 2 pin contact resistance R23 of amplifier, 1 pin of amplifier U1A is received after resistance R23 series capacitance C12, 1 pin of amplifier U1A is connected with 5 pins of amplifier U1B, 6 pins of amplifier U1B are connected with one end of resistance R24 and pass through resistance R30 ground connection GND1, 7 pins of another termination amplifier U1B of resistance R24, 7 pins of amplifier U1B are connected to 10 pins of amplifier U1C by resistance R15, 10 pins of amplifier U1C are by resistance R14 ground connection GND1, input electric cur-rent measure end IS-1 receives 10 pins of amplifier U1C by resistance R20, 9 pins of amplifier U1C are by resistance R29 ground connection GND1, the two ends of resistance R28 connect 8 of amplifier U1C respectively, 9 pins, 8 pins of amplifier U1C receive 12 pins of amplifier U1D by resistance R21, 12 pin ground connection GND1, 12 of amplifier U1D is connected to after resistance R17 series capacitance C11 is in parallel with reset switch S1 again, 14 pins, resistance R26, 14 pins of a termination amplifier U1D after R27 series connection, other end ground connection GND1, resistance R26, the link of R27 is connected to 13 ends of amplifier U1D, 14 pins of amplifier U1D are connected to 3 pins of comparator U2A by resistance R22, 7 pins of amplifier U1B are connected to 2 pins of comparator U2A by resistance R25, 1 pin of comparator U2A connects the RN end of reset-set flip-flop, the SN terminated clock pulse signal of reset-set flip-flop, the QN end of reset-set flip-flop receives the reset terminal of reset switch S1, the Q end of reset-set flip-flop is connected to the grid of break-make triode Q1.Independent loops control unit is connected with the current sampling resistor of switch transition unit, samples to the input current of switch converting unit, and according to sampled signal adjustment control signal.Independent loops control unit is sampled to output voltage by analog photoelectricity isolated location, and according to sampled signal adjustment control signal.Independent loops control unit control switch converting unit, effectively can suppress input skew, improve precision and the response speed of output voltage, by sampling input current signal and output voltage signal, according to expecting that voltage signal obtains controlling the signal of break-make triode Q1 break-make, when input voltage exists distortion, can the mean value of output voltage be made to equal reference value in a switch periods, suppress input skew.
Described independent loops control unit controls output voltage, voltage accuracy can be controlled within 1%, when distortion appears in input terminal voltage, can output voltage be made to equal voltage reference value in a switch periods, effectively suppress input voltage to distort the impact brought.
Described current stabilization control unit comprises subtraction circuit, linear scale integral adjustment circuit, proportion adjustment circuit, comparison circuit, a NAND gate and a photoelectric isolating circuit.Wherein subtraction circuit, linear scale integral adjustment electricity routing amplifier and peripheral circuit composition thereof, proportion adjustment electricity routing amplifier, amplitude limiter and peripheral circuit composition, comparison circuit is made up of comparator, triangular-wave generator and peripheral circuit.Described current stabilization control unit obtains from driving switch power subsystem the size exporting reference current by electric resistance partial pressure.Current stabilization control unit is sampled to output current by the Hall current-sensing circuit of stabilized current power supply output unit, and according to sampled signal adjustment control signal.As shown in Figure 4, the expectation load current end IS-O* of current stabilization control unit is connected to 3 pins of amplifier U4A by resistance R33,3 pins of amplifier U4A are by resistance R39 ground connection GND3,2 pins of amplifier U4A are connected to 8 pins of amplifier U4C by resistance R37,1,2 pins being connected in parallel on amplifier U4A of resistance R41.1 pin of amplifier U4A receives 5 pins of amplifier U4B by resistance R35, one end ground connection GND3 after resistance R32 series capacitance C13, the other end receives 5 pins of amplifier U4B, load current IS-O connects 6 pins of amplifier U4B by resistance R38, 6 of amplifier U4B is parallel to after electric capacity C14 series resistance R46, 7 pins, 7 pins of amplifier U4B are by resistance R31 ground connection GND3, 10 pins of amplifier U4C are received by resistance R34, receive the input of integration amplitude limiter JF1 simultaneously, the output of integration amplitude limiter JF1 receives 9 pins of amplifier U4C by resistance R40, 8 pins of amplifier U4C are received by resistance R45, 3 pins of comparator U7A are received by resistance R36, 2 pins of a termination comparator U7A after resistance R42 connects with triangular-wave generator SJ1, other end ground connection GND3, 1 pin of comparator U7A receives the B end of NAND gate U5, pulse-width modulation input receives the A end of NAND gate U5, the output Y of NAND gate U5 receives the light-emitting diode negative pole end of photoelectric isolating circuit U6 by resistance R44, the positive terminal ground connection GND3 of light-emitting diode, second driving switch power supply VCC2 connects the collector electrode of triode by resistance R43, collector electrode exports the grid being connected to break-make triode Q2, grounded emitter GND2.
Current stabilization control unit adopts anti-saturation controller, and anti-saturation can effectively prevent from occurring saturation integral phenomenon in control procedure, makes controller maintain linear continuum, reaches constant output current, improve the object of control precision.Current stabilization control unit adopts conditioning technology anti-saturation algorithm, makes the electric current of stabilized current power supply output unit maintain linear continuum, reduces overshoot, improve control precision, make system have good dynamic quality and stable state accuracy, improve the precision of output current.
As shown in Figure 5, the ac input end ACI+ of EMI filter unit receives the left upper end of common mode choke T2 after shock resistance resistance RT1, ac input end ACI-receives the lower-left end of common mode choke T1 through fuse-link F1, is parallel to left upper end and the lower-left end of common mode choke T2 after piezo-resistance R47 safe electric capacity C15 in parallel again.Ac output end ACO+ and ac output end ACO-is connected respectively to after the upper right side of common mode choke T2 and bottom righthand side safe electric capacity C16 in parallel.
Described pulse-width modulation light regulon comprises 555 timers, resistance R51, R53, variable resistor R52, diode D13, D14, electric capacity C17, C18, by the duty ratio regulating the size of variable resistor R52 to get final product regulation output pulse, reaches the object of light modulation.As shown in Figure 6, 3rd driving switch power supply VCC3 receives 4 of 555 timer U11 respectively, one end of 8 pins and resistance R51, the other end of resistance R51 receives one end of variable resistance R52, the other end of variable resistance R52 receives the negative pole of diode D14, the intermediate ends of variable resistance R52 receives 7 pins of 555 timers and the positive pole of diode D13, the negative pole of diode D13 and the positive pole of diode D14 receive 6 of 555 timers, one end of 2 pins and electric capacity C18, the other end ground connection GND3 of electric capacity C18, 5 pins of the one termination 555 timer U11 of electric capacity C17, other end ground connection GND3, the 1 pin ground connection GND3 of 555 timer U11, 3 pins connect pulse-width modulation output.
Described analog photoelectricity isolated location comprises linear photoelectric isolation circuit HCNR201, input resistance R50, feedback resistance R48, voltage stabilizing adjusting resistance R49, is held by the output voltage detected through the VC1 of analog photoelectricity Isolation input to independent loops control unit.As shown in Figure 7, detect voltage Vin and receive 2 pins of amplifier U8A and 3 pins of photoelectric isolating circuit U9 by resistance R50, the 3 pin ground connection GND2 of amplifier U8A, 1 pin receives 1 pin of photoelectric isolating circuit U9 by resistance R49,4, the 5 pin ground connection GND2 of photoelectric isolating circuit U9,2 pins meet VCC2,7,8 pins are unsettled, 6 pins receive 2 pins of amplifier U10A, 2 pins of amplifier U10A receive the 1 pin output feedack voltage VC1 of amplifier U10A, the 3 pin ground connection GND1 of amplifier U10A by resistance R48.
Detect voltage Vin and feed back to independent loops control unit after photoelectric isolating circuit U9 isolates, main circuit and control circuit are effectively isolated.In practical operation, photoelectric isolating circuit can simultaneously make R50 and R48 resistance equal in design process, can realize the size isolation such as input and output.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.
Claims (5)
1. a self-adapted high-efficient LED drive power, described LED drive power comprises: EMI filter unit, DC converting unit, switch transition unit, driving switch power subsystem, independent loops control unit, analog photoelectricity isolated location, stabilized current power supply output unit, current stabilization control unit, pulse-width modulation light regulon; Wherein,
Described EMI filter unit, DC converting unit, switch transition unit connect successively, and be connected to stabilized current power supply output unit, the output of switch transition unit connects driving switch power subsystem, the output of driving switch power subsystem connects independent loops control unit, analog photoelectricity isolated location, current stabilization control unit, pulse-width modulation light regulon respectively, the output of analog photoelectricity isolated location is by independent loops control unit connecting valve converting unit, and pulse-width modulation light regulon is connected to stabilized current power supply output unit by current stabilization control unit, alternating current outputs to switch transition unit after EMI filter unit and DC converting unit, the output voltage detected is passed through analog photoelectricity Isolation input to independent loops control unit by analog photoelectricity isolated location, driving switch power subsystem gives independent loops control unit respectively, analog photoelectricity isolated location, current stabilization control unit, pulse-width modulation light regulon is powered, independent loops control unit control switch converting unit exports expects voltage, current stabilization control unit controls stabilized current power supply output unit and exports expectation electric current, pulse-width modulation light regulon carries out Dimming operation by current stabilization control unit to described LED.
2. a driving power as claimed in claim 1, input AC 220V voltage is by accessing described DC converting unit after EMI filtering, described DC converting unit is made up of DC converting bridge D2, diode D3, inductance L 2, electric capacity C4, C5.
3. a driving power as claimed in claim 2, described DC converting bridge D2 output is connected to diode D3 and is connected to absorbing circuit by inductance L 2, electric capacity C4, C5 one end receives the left and right end of inductance L 2 respectively, other end ground connection GND1, absorbing circuit is by resistance R3, electric capacity C6, diode D6 forms, resistance R3 connects with diode D6 with after electric capacity C6 parallel connection again, absorbing circuit is parallel to the two ends of transformer T1 voltage input side again, the positive pole of diode D6 is connected with break-make triode Q1 again, the other end connecting resistance R10 of break-make triode Q1, resistance R10 other end ground connection GND1.
4. a driving power as claimed in claim 3, described driving switch power subsystem is divided into 3 subelements, be respectively the first driving switch power supply VCC1, the second driving switch power supply VCC2, the 3rd driving switch power supply VCC3, the positive pole of diode D9 is connected with the negative pole of diode D3, the negative pole series resistance R8 of diode D9, be in series with resistance R8 after Zener diode D12 and electric capacity C9 is in parallel, the negative pole of Zener diode D12 is the first driving switch power supply VCC1 again; The positive pole of diode D8 is connected with the negative pole of diode D1, and its negative pole is connected to resistance R7, and be in series with resistance R7 after Zener diode D11 and electric capacity C8 is in parallel, the negative pole of Zener diode D11 is VCC2 again; The negative pole of diode D7 is connected with another voltage outlet side of transformer T1, its positive pole and resistance R6 are in series, be in series with resistance R6 after Zener diode D10 and electric capacity C7 is in parallel, the negative pole of Zener diode D10 is the 3rd driving switch power supply VCC3 again.
5. a driving power as claimed in claim 4, described first driving switch power supply VCC1 is connected to the voltage of independent loops control unit with reference to end after resistance R9 and R11 dividing potential drop, in independent loops control unit, the Q end of reset-set flip-flop is connected with the grid of break-make triode Q1, the IS-1 end of independent loops control unit is connected with the source electrode of break-make triode Q1, and the VC1 end of independent loops control unit is held with the VC1 of analog photoelectricity isolated location and is connected, resistance R1 is in parallel with diode D1 again after connecting with electric capacity C1, the positive pole of diode D1 receives the voltage outlet side of transformer T1, its negative pole series inductance L1, electric capacity C2 is connected with diode D1 negative pole, its other end receives ground GND2, resistance R2, after R4 series connection is in parallel with electric capacity C3 again, one end is connected to right-hand member and the load LED+ of inductance L 1, its other end ground connection GND2, the tie point of resistance R2 and R4 is connected to the Vin end of analog photoelectricity isolated location, the negative pole of diode D5 meets load LED+, its positive pole connects the disconnected drain electrode of triode Q2 and one end of inductance L 3, the other end of inductance L 3 is connected with load LED-, the source ground GND2 of break-make triode Q2, the electric current in load is flow through in Hall current-sensing circuit CHB-1 measurement, its two ends parallel resistance R5, one end ground connection GND3 of resistance R5, the other end receives the IS-O end of current stabilization control unit, 3rd driving switch power supply VCC3 is through resistance R12, the IS-O* end of current stabilization control unit is received after R13 series connection dividing potential drop, the pulse-width modulation end of pulse-width modulation light regulon is connected with the pulse-width modulation end of current stabilization control unit, in current stabilization control unit, the collector electrode of U6 is connected to the grid of break-make triode Q2.
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| CN105764184A (en) * | 2016-03-17 | 2016-07-13 | 宁波市江东精诚自动化设备有限公司 | Wireless intelligent dimming switch |
| CN107807585A (en) * | 2017-11-20 | 2018-03-16 | 宁德师范学院 | A kind of power equipment monitoring system |
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