CN102611287A - Method for realizing full-bridge ZVS (Zero Voltage Switch) and ZCS (Zero Current Switch) drive and circuit thereof - Google Patents
Method for realizing full-bridge ZVS (Zero Voltage Switch) and ZCS (Zero Current Switch) drive and circuit thereof Download PDFInfo
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- CN102611287A CN102611287A CN2012100634436A CN201210063443A CN102611287A CN 102611287 A CN102611287 A CN 102611287A CN 2012100634436 A CN2012100634436 A CN 2012100634436A CN 201210063443 A CN201210063443 A CN 201210063443A CN 102611287 A CN102611287 A CN 102611287A
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- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention discloses a method for realizing full-bridge ZVS (Zero Voltage Switch) and ZCS (Zero Current Switch) drive and a circuit thereof. The circuit comprises a full-bridge conversion circuit, an output rectification filtering circuit, a PID (Proportion Integration Differentiation) regulating circuit and a PWM (Pulse Width Modulation) control circuit, wherein the full-bridge conversion circuit comprises power tubes Q8, Q9, Q10 and Q11; the PWM control circuit comprises a bidirectional input square wave generator, a dead area time regulating circuit, a triangular wave generator triggering circuit, a ZCS and PWM regulating circuit, a full-bridge driver and a triangular wave generator, the square wave generator is respectively connected with the dead area time regulating circuit, the triangular wave generator triggering circuit, the ZCS and PWM regulating circuit and the full-bridge driver, the ZCS and PWM regulating circuit is connected with the input end of the full-bridge driver, and the output end of the full-bridge driver respectively drives the power tubes Q8 and Q10 upper half-bridges and Q9 and Q11 lower half-bridges. The method for realizing the full-bridge ZVS and ZCS drive and the circuit thereof, disclosed by the invention, a larger-power power supply design can be realized, the whole machine of the power supply has the advantages of higher efficiency, larger power and lower cost.
Description
Technical field
The present invention relates to the full bridge driving circuit field, relate in particular to and a kind ofly can realize full-bridge zero-voltage switch (ZVS:Zero Voltage Switch), Zero Current Switch (ZCS:Zero Current Switch) method of driving and circuit thereof.
Background technology
Along with the develop rapidly of Computers and Communication technology, also obtained significant progress as the Switching Power Supply of corollary equipment.For high power switching power supply, existing full-bridge Driving technique adopts the phase-shifting full-bridge method usually, and it is through adopting application-specific integrated circuit (ASIC) and joining phase shifting transformer and resonant network is realized outward.But, because the adjustment of parameter in use of phase-shifting full-bridge technology is comparatively complicated, have relatively high expectations, can only realize the ZVS of half-bridge usually, this is a difficult point at the power supply design field.In addition,, can make its loss increase, thereby the efficient of power supply complete machine is reduced, in the design of high density large power supply, receive certain restriction owing to increased phase shifting transformer.Moreover the existing producer of phase-shifting full-bridge drive IC that can provide is very few, so user's alternative is narrower, and cost is higher.
Summary of the invention
A purpose of the present invention is, a kind of realization full-bridge zero-voltage switch, Zero Current Switch method of driving are provided, and its power supply design simplification need not external resonant network, debugs easy to be reliably, and technical difficulty is lower;
Another object of the present invention is to, a kind of circuit of realizing that full-bridge zero-voltage switch, Zero Current Switch drive is provided, it can realize more powerful power supply design, and the power supply overall efficiency is higher, and power is bigger, and cost is lower.
For realizing above-mentioned purpose, the present invention provides a kind of realization full-bridge zero-voltage switch, Zero Current Switch method of driving, and it comprises the steps:
Utilize digital circuit to constitute the square-wave generator of a dual output, 180 ° of its phase phasic differences, two waveforms of 3B, the 4B that this square-wave generator produces are gone up half- bridge drive waveforms 3Y, 4Y through full bridge driver output, drive through a transformer isolation and go up half-bridge;
Utilize integrating circuit to constitute Dead Time adjustment circuit, two waveforms of 3B, 4B that square-wave generator produces are sent into this dead band time adjusting circuit, and adjustment obtains a fixedly Dead Time, and control is opened in conduct simultaneously half-bridge down;
Utilize logic gates to constitute triangular-wave generator circuits for triggering; Two waveforms of 3B, 4B that square-wave generator produces generate output waveform C after sending into these triangular-wave generator circuits for triggering; Its negative sense trigger characteristic makes approximate triangular wave D of triangular-wave generator output, through obtaining a square wave behind the inverter;
Utilize logic gates and integrating circuit to constitute a ZCS and PWM adjustment circuit; From the square wave of inverter in this ZCS and PWM adjustment circuit with 3B, two waveforms of 4B synthetic after; Obtain output waveform E, F, then through full bridge driver output 1Y, 2Y waveform, to drive down half-bridge;
When load variations; The corresponding generation height of the DC reference voltage of triangular-wave generator changes; The pulsewidth of inverter output square wave takes place change; The Y1 of full bridge driver output, the pulsewidth of Y2 waveform be respective change also, and therefore the ON time of following half-bridge obtains changing, thereby plays the PWM control action.
Wherein, The frequency of the square-wave generator of said dual output is 150KHz; Two waveforms of 3B, 4B that this square-wave generator produces are delivered to the 6th, 10 pin inputs of full bridge driver; Half- bridge drive waveforms 3Y, 4Y are gone up in Y3, the output of Y4 pin through full bridge driver, then through the last half-bridge of power tube Q8, Q10 in the transformer T3 isolation drive full-bridge circuit.
Among the present invention; Be connected with a capacitor C 76 between said Dead Time adjustment circuit and the triangular-wave generator flip-flop circuit respectively, reach C77; After two waveforms of 3B, 4B that square-wave generator produces are sent into Dead Time adjustment circuit; Obtain a fixedly Dead Time through the size of adjusting this capacitor C 76 and C77, to prevent half-bridge common-mode conducting up and down.
The present invention from the square wave of inverter in ZCS and PWM adjustment circuit with 3B, two waveforms of 4B synthetic after; Obtain output waveform E, F respectively at its 10th and 11 pin; This waveform E, F are delivered to the 2nd, 4 pin inputs of full bridge driver; After full bridge driver output 1Y, 2Y waveform, to drive half-bridge under power tube Q9 in the full-bridge circuit, the Q10.
In addition; The output of said triangular-wave generator is connected with the emitter of an optocoupler triode, when load variations, detected output end current and voltage variety is sent into a PID regulating circuit; After the PID conciliation; The optocoupler triode obtains and the corresponding to electric current of output end voltage and current change quantity changes, and makes the CE voltage generation corresponding linear change of optocoupler triode, thereby makes corresponding the generations height of the DC reference voltage variation of triangular-wave generator.
Further; The present invention also provides a kind of circuit of realizing that full-bridge zero-voltage switch, Zero Current Switch drive; Comprise full-bridge circuit, output rectifier and filter, reach the PID regulating circuit; It also comprises pwm control circuit, includes power tube Q8, Q9, Q10 in the said full-bridge circuit, reaches Q11; The square-wave generator, Dead Time adjustment circuit, triangular-wave generator circuits for triggering, ZCS and the PWM that comprise the two-way input of 180 ° of phase phasic differences in the said pwm control circuit adjust circuit, full bridge driver, reach triangular-wave generator; This square-wave generator respectively with Dead Time adjustment circuit, triangular-wave generator circuits for triggering, ZCS and PWM adjustment circuit, and full bridge driver be connected; The triangular-wave generator circuits for triggering are connected with triangular-wave generator; ZCS and PWM adjustment circuit are connected with the input of full bridge driver, and the output of this full bridge driver is distinguished driving power pipe Q8, the last half-bridge of Q10, reached half-bridge under Q9, the Q11.
Concrete; The frequency of the square-wave generator of said dual output is 150KHz; This square-wave generator adopts digital circuit to constitute; Dead Time adjustment circuit adopts integrating circuit to constitute, and the triangular-wave generator circuits for triggering adopt logic gates to constitute, and ZCS and PWM adjustment circuit adopt logic gates and integrating circuit to constitute.
Further; Be provided with a transformer T3 between said full bridge driver and the full-bridge circuit; Two waveforms of 3B, 4B that said square-wave generator produces are delivered to the 6th, 10 pin inputs of full bridge driver; Half- bridge drive waveforms 3Y, 4Y are gone up in Y3, the output of Y4 pin through full bridge driver, then through the last half-bridge of power tube Q8, Q10 in the transformer T3 isolation drive full-bridge circuit.
In addition; Be connected with a capacitor C 76 between said Dead Time adjustment circuit and the triangular-wave generator flip-flop circuit respectively, reach C77; Be connected with an inverter ic 2E between triangular-wave generator and ZCS and the PWM adjustment circuit, obtain a fixedly Dead Time conduct half-bridge unlatching control down through the size of adjusting this capacitor C 76, C77; Deliver to from two waveforms of 3B, 4B of square-wave generator and to generate output waveform C behind the triangular-wave generator circuits for triggering, approximate triangular wave D of triangular-wave generator output is through obtaining a square wave behind the inverter ic 2E.
Moreover, being provided with an optocoupler triode between said PID regulating circuit and the triangular-wave generator, the emitter of this optocoupler triode is connected to the output of triangular-wave generator; The square wave that inverter ic 2E produces in ZCS and PWM adjustment circuit with 3B, two waveforms of 4B synthetic after; Obtain output waveform E, F respectively at its 10th and 11 pin; This waveform E, F are delivered to the 2nd, 4 pin inputs of full bridge driver; After full bridge driver output 1Y, 2Y waveform, to drive half-bridge under power tube Q9 in the full-bridge circuit, the Q10.
Realization full-bridge zero-voltage switch of the present invention, Zero Current Switch method of driving and circuit thereof, do not need external resonant network at its power supply design simplification, debug easy to be reliably, and technical difficulty is lower; It adopts general Digital Logical Circuits, and cost is lower, and operating frequency can reach 500KHz, can reduce power volume greatly; In addition, its power supply overall efficiency is higher, and average efficiency is not less than 92%, and the design of high density large power supply is brought great convenience; Moreover, owing to adopt universal component, can realize the integrated circuit words under certain condition, final drive circuit just can just become monolithic integrated circuit by present module, and it is comparatively convenient to install and use.
Description of drawings
Fig. 1 realizes the schematic flow sheet of full-bridge zero-voltage switch, a kind of specific embodiment of Zero Current Switch method of driving for the present invention;
Fig. 2 realizes the module diagram of a kind of specific embodiment of circuit that full-bridge zero-voltage switch, Zero Current Switch drive for the present invention;
Fig. 3 is that the circuit between each module connects sketch map among Fig. 2;
Fig. 4 realizes the sequential chart of drive waveforms in the circuit working process that full-bridge zero-voltage switch, Zero Current Switch drive for the present invention.
Embodiment
As shown in Figure 1, the present invention provides a kind of realization full-bridge zero-voltage switch, Zero Current Switch method of driving, and it comprises the steps:
Step 2 utilizes integrating circuit to constitute Dead Time adjustment circuit, and two waveforms of 3B, 4B that square-wave generator produces are sent into this dead band time adjusting circuit, and adjustment obtains a fixedly Dead Time, and control is opened in conduct simultaneously half-bridge down.Among the present invention; Be connected with a capacitor C 76 between said Dead Time adjustment circuit and the triangular-wave generator flip-flop circuit respectively, reach C77; After two waveforms one tunnel of 3B, 4B that square-wave generator produces are sent into Dead Time adjustment circuit; Obtain a fixedly Dead Time through the size of adjusting this capacitor C 76 and C77, in order to prevent half-bridge common-mode conducting up and down, simultaneously as half-bridge unlatching control down.
Further; Like Fig. 2, shown in 3; The present invention also provides a kind of circuit of realizing that full-bridge zero-voltage switch, Zero Current Switch drive; Comprise full-bridge circuit 10, output rectifier and filter 20, reach PID (PID:Proportion Integration Differentiation) regulating circuit 30; It also comprises pulse width modulation (PWM:Pulse Width Modulation) control circuit 40, includes power tube Q8, Q9, Q10 in the said full-bridge circuit 10, reaches Q11; The square-wave generator 41, Dead Time adjustment circuit 42, triangular-wave generator circuits for triggering 43, ZCS and the PWM that comprise the two-way input of 180 ° of phase phasic differences in the said pwm control circuit 40 adjust circuit 44, full bridge driver 45, reach triangular-wave generator 46; This square-wave generator 41 respectively with Dead Time adjustment circuit 42, triangular-wave generator circuits for triggering 43, ZCS and PWM adjustment circuit 44, and full bridge driver 45 be connected; Triangular-wave generator circuits for triggering 43 are connected with triangular-wave generator 46; ZCS and PWM adjustment circuit 44 are connected with the input of full bridge driver 45, and the output of this full bridge driver 45 is distinguished driving power pipe Q8, the last half-bridge of Q10, reached half-bridge under Q9, the Q11.
As a kind of specific embodiment of the present invention, the frequency of the square-wave generator 41 of said dual output is 150KHz, and this square-wave generator 41 adopts digital circuit to constitute.As a kind of selectivity embodiment of the present invention, this full bridge driver 45 can adopt a chip IC 5 to realize its function.Between this full bridge driver 45 and full-bridge circuit 10, also be provided with a transformer T3; Two waveforms of 3B, 4B that square-wave generator 41 produces are delivered to the 6th, 10 pin inputs of full bridge driver 45; Half- bridge drive waveforms 3Y, 4Y are gone up in Y3, the output of Y4 pin through full bridge driver 45, then through the last half-bridge of power tube Q8, Q10 in the transformer T3 isolation drive full-bridge circuit 10.
Among the present invention, said Dead Time adjustment circuit 42 can adopt integrating circuit to constitute, and is connected with a capacitor C 76 between this dead band time adjusting circuit 42 and the triangular-wave generator flip-flop circuit 43 respectively, reaches C77.Two waveforms one tunnel of 3B, 4B that square-wave generator 41 produces obtain a fixedly Dead Time through the size of adjusting this capacitor C 76 and C77 after sending into Dead Time adjustment circuit 42, and in order to prevent half-bridge common-mode conducting up and down, control is opened in conduct simultaneously half-bridge down.
Triangular-wave generator circuits for triggering 43 of the present invention can adopt logic gates to constitute, and between triangular-wave generator 46 and ZCS and PWM adjustment circuit 44, are connected with an inverter ic 2E.Two waveforms of 3B, 4B that square-wave generator 41 produces are sent into these triangular-wave generator circuits for triggering 43 backs and are generated output waveform C, and its negative sense trigger characteristic makes approximate triangular wave D of triangular-wave generator 46 outputs, obtain a square wave after delivering to inverter ic 2E.
In the specific embodiment of the invention, ZCS and PWM adjustment circuit 44 can adopt logic gates and integrating circuit to constitute.From the square wave of inverter ic 2E in ZCS and PWM adjustment circuit 44 with 3B, two waveforms of 4B synthetic after; Obtain output waveform E, F respectively at its 10th and 11 pin; This waveform E, F are delivered to the 2nd, 4 pin inputs of full bridge driver 45; After full bridge driver 45 output 1Y, 2Y waveform, to drive half-bridge under power tube Q9 in the full-bridge circuit 10, the Q10.
Further, being provided with an optocoupler triode IC10 between PID regulating circuit 30 of the present invention and the triangular-wave generator 46, the emitter of this optocoupler triode IC10 is connected to the output OUT1 place of triangular-wave generator 46.When load variations; Detected output end current and voltage variety are sent into PID regulating circuit 30, and after PID regulated, the transmitting tube of optocoupler triode IC10 obtained changing with output voltage, the corresponding to electric current of current change quantity; Thereby make the CE voltage generation corresponding linear change of optocoupler triode IC10; Because the emitter of optocoupler triode IC10 is connected to the output OUT1 of triangular-wave generator 46, this just makes also just corresponding the generation just of DC reference voltage of triangular-wave generator 46 change, and causes the pulsewidth of inverter ic 2E output square wave to take place change at last; So; The Y1 of full bridge driver 45 outputs, the pulsewidth of Y2 square wave be respective change also, and the ON time of following half-bridge also just obtains changing, and this has just played the PWM control action.
As shown in Figure 4, Y3, the Y4 pin of 3Y, the corresponding full bridge driver 45 of 4Y difference drive power tube Q8, the Q10 that goes up half-bridge respectively among the figure, corresponding respectively Y1, the Y2 pin of answering full bridge driver 45 of 1Y, 2Y, power tube Q11, the Q9 of half-bridge under driving respectively.By visible among the figure, when power tube Q8 conducting, power tube Q11 is not conducting also, time-delay t1 conducting again after the time.In like manner, power tube Q9 also delay time t1 with respect to power tube Q10 after conducting, last half-bridge is in advance in half-bridge conducting down, this moment, the no current path was realized zero current turning-on.Simultaneously, last half-bridge postpones in half-bridge shutoff down, and this moment, same no current path was realized zero-current switching, and visible upward half-bridge has been realized ZCS.This process drives the sequential completion through digital circuit is set, and through control capacittance C78, C79, half-bridge driven is lagged behind go up half-bridge 50～150nS.Following half-bridge postpones in last half-bridge conducting, and following brachium pontis VDS voltage is by high step-down, the LC series resonance effect of loop, the former limit of switch transformer, and electric current is leading, and voltage delay, VDS drop to the complete conducting of brachium pontis at present below 1/2, make that loss reduces when opening; When following half-bridge turn-offed, VDS voltage was uprised by low, because VDS is under the LC resonance effect, climbing speed postpones, and realizes that ZVS turn-offs.This shows down that the half-bridge switch loss exists only in when opening below 1/2 voltage, has effectively reduced switching loss.
In sum, realization full-bridge zero-voltage switch of the present invention, Zero Current Switch method of driving and circuit thereof, do not need external resonant network at its power supply design simplification, debug easy to be reliably, and technical difficulty is lower; It adopts general Digital Logical Circuits, and cost is lower, and operating frequency can reach 500KHz, can reduce power volume greatly; In addition, its power supply overall efficiency is higher, and average efficiency is not less than 92%, and the design of high density large power supply is brought great convenience; Moreover, owing to adopt universal component, can realize the integrated circuit words under certain condition, final drive circuit just can just become monolithic integrated circuit by present module, and it is comparatively convenient to install and use.
The above; For the person of ordinary skill of the art; Can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection range of accompanying Claim of the present invention.
Claims (10)
1. realize full-bridge zero-voltage switch, Zero Current Switch method of driving for one kind, it is characterized in that, comprise the steps:
Utilize digital circuit to constitute the square-wave generator of a dual output, 180 ° of its phase phasic differences, two waveforms of 3B, the 4B that this square-wave generator produces are gone up half-bridge drive waveforms 3Y, 4Y through full bridge driver output, drive through a transformer isolation and go up half-bridge;
Utilize integrating circuit to constitute Dead Time adjustment circuit, two waveforms of 3B, 4B that square-wave generator produces are sent into this dead band time adjusting circuit, and adjustment obtains a fixedly Dead Time, and control is opened in conduct simultaneously half-bridge down;
Utilize logic gates to constitute triangular-wave generator circuits for triggering; Two waveforms of 3B, 4B that square-wave generator produces generate output waveform C after sending into these triangular-wave generator circuits for triggering; Its negative sense trigger characteristic makes approximate triangular wave D of triangular-wave generator output, through obtaining a square wave behind the inverter;
Utilize logic gates and integrating circuit to constitute a ZCS and PWM adjustment circuit; From the square wave of inverter in this ZCS and PWM adjustment circuit with 3B, two waveforms of 4B synthetic after; Obtain output waveform E, F, then through full bridge driver output 1Y, 2Y waveform, to drive down half-bridge;
When load variations; The corresponding generation height of the DC reference voltage of triangular-wave generator changes; The pulsewidth of inverter output square wave takes place change; The Y1 of full bridge driver output, the pulsewidth of Y2 waveform be respective change also, and therefore the ON time of following half-bridge obtains changing, thereby plays the PWM control action.
2. realization full-bridge zero-voltage switch as claimed in claim 1, Zero Current Switch method of driving; It is characterized in that; The frequency of the square-wave generator of said dual output is 150KHz; Two waveforms of 3B, 4B that this square-wave generator produces are delivered to the 6th, 10 pin inputs of full bridge driver, go up half-bridge drive waveforms 3Y, 4Y through Y3, the output of Y4 pin of full bridge driver, then through the last half-bridge of power tube Q8, Q10 in the transformer T3 isolation drive full-bridge circuit.
3. realization full-bridge zero-voltage switch as claimed in claim 2, Zero Current Switch method of driving; It is characterized in that; Be connected with a capacitor C 76 between said Dead Time adjustment circuit and the triangular-wave generator flip-flop circuit respectively, reach C77; Two waveforms of 3B, 4B that square-wave generator produces obtain a fixedly Dead Time through the size of adjusting this capacitor C 76 and C77 after sending into Dead Time adjustment circuit, to prevent half-bridge common-mode conducting up and down.
4. realization full-bridge zero-voltage switch as claimed in claim 1, Zero Current Switch method of driving; It is characterized in that; Said square wave from inverter in ZCS and PWM adjustment circuit with 3B, two waveforms of 4B synthetic after, obtain output waveform E, F respectively at its 10th and 11 pin, this waveform E, F are delivered to the 2nd, 4 pin inputs of full bridge driver; After full bridge driver output 1Y, 2Y waveform, to drive half-bridge under power tube Q9 in the full-bridge circuit, the Q10.
5. realization full-bridge zero-voltage switch as claimed in claim 1, Zero Current Switch method of driving; It is characterized in that; The output of said triangular-wave generator is connected with the emitter of an optocoupler triode, when load variations, detected output end current and voltage variety is sent into a PID regulating circuit; After the PID conciliation; The optocoupler triode obtains and the corresponding to electric current of output end voltage and current change quantity changes, and makes the CE voltage generation corresponding linear change of optocoupler triode, thereby makes corresponding the generations height of the DC reference voltage variation of triangular-wave generator.
6. circuit of realizing that full-bridge zero-voltage switch, Zero Current Switch drive; Comprise full-bridge circuit, output rectifier and filter, reach the PID regulating circuit; It is characterized in that, also comprise pwm control circuit, include power tube Q8, Q9, Q10 in the said full-bridge circuit, reach Q11; The square-wave generator, Dead Time adjustment circuit, triangular-wave generator circuits for triggering, ZCS and the PWM that comprise the two-way input of 180 ° of phase phasic differences in the said pwm control circuit adjust circuit, full bridge driver, reach triangular-wave generator; This square-wave generator respectively with Dead Time adjustment circuit, triangular-wave generator circuits for triggering, ZCS and PWM adjustment circuit, and full bridge driver be connected; The triangular-wave generator circuits for triggering are connected with triangular-wave generator; ZCS and PWM adjustment circuit are connected with the input of full bridge driver, and the output of this full bridge driver is distinguished driving power pipe Q8, the last half-bridge of Q10, reached half-bridge under Q9, the Q11.
7. the circuit that realization full-bridge zero-voltage switch as claimed in claim 6, Zero Current Switch drive; It is characterized in that; The frequency of the square-wave generator of said dual output is 150KHz, and this square-wave generator adopts digital circuit to constitute, and Dead Time adjustment circuit adopts integrating circuit to constitute; The triangular-wave generator circuits for triggering adopt logic gates to constitute, and ZCS and PWM adjustment circuit adopt logic gates and integrating circuit to constitute.
8. the circuit that realization full-bridge zero-voltage switch as claimed in claim 6, Zero Current Switch drive; It is characterized in that; Be provided with a transformer T3 between said full bridge driver and the full-bridge circuit; Two waveforms of 3B, 4B that said square-wave generator produces are delivered to the 6th, 10 pin inputs of full bridge driver, go up half-bridge drive waveforms 3Y, 4Y through Y3, the output of Y4 pin of full bridge driver, then through the last half-bridge of power tube Q8, Q10 in the transformer T3 isolation drive full-bridge circuit.
9. the circuit that realization full-bridge zero-voltage switch as claimed in claim 8, Zero Current Switch drive; It is characterized in that; Be connected with a capacitor C 76 between said Dead Time adjustment circuit and the triangular-wave generator flip-flop circuit respectively, reach C77; Be connected with an inverter ic 2E between triangular-wave generator and ZCS and the PWM adjustment circuit, obtain a fixedly Dead Time conduct half-bridge unlatching control down through the size of adjusting this capacitor C 76, C77; Deliver to from two waveforms of 3B, 4B of square-wave generator and to generate output waveform C behind the triangular-wave generator circuits for triggering, approximate triangular wave D of triangular-wave generator output is through obtaining a square wave behind the inverter ic 2E.
10. the circuit that realization full-bridge zero-voltage switch as claimed in claim 9, Zero Current Switch drive; It is characterized in that; Be provided with an optocoupler triode between said PID regulating circuit and the triangular-wave generator, the emitter of this optocoupler triode is connected to the output of triangular-wave generator; The square wave that inverter ic 2E produces in ZCS and PWM adjustment circuit with 3B, two waveforms of 4B synthetic after; Obtain output waveform E, F respectively at its 10th and 11 pin; This waveform E, F are delivered to the 2nd, 4 pin inputs of full bridge driver; After full bridge driver output 1Y, 2Y waveform, to drive half-bridge under power tube Q9 in the full-bridge circuit, the Q10.
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| CN104022643A (en) * | 2014-03-07 | 2014-09-03 | 深圳市伟创电气有限公司 | Simple pulse switch power supply PWM generation circuit and method |
| CN104076714A (en) * | 2014-07-04 | 2014-10-01 | 东莞市华宜新能源科技有限公司 | MCU anti-logic control circuit and half-bridge control circuit provided with MCU anti-logic control circuit |
| CN104199289A (en) * | 2014-08-04 | 2014-12-10 | 江苏科技大学 | Identification-free single neuron self-adaption PID (Proportion Integration Differentiation) control method for magnet power source rectification system |
| CN106208783A (en) * | 2016-07-20 | 2016-12-07 | 广东双核电气有限公司 | Novel Soft Switching commutation system |
| CN106571733A (en) * | 2016-10-18 | 2017-04-19 | 常州工学院 | Multifunctional magnetic support multiplying device |
| CN108539965A (en) * | 2018-04-28 | 2018-09-14 | 安徽省航嘉智源科技有限公司 | A kind of pwm pulse control method, storage medium and terminal based on full-bridge circuit |
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