CN110417244A - A kind of high frequency chopping Sofe Switch regulating circuit - Google Patents
A kind of high frequency chopping Sofe Switch regulating circuit Download PDFInfo
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- CN110417244A CN110417244A CN201910793716.4A CN201910793716A CN110417244A CN 110417244 A CN110417244 A CN 110417244A CN 201910793716 A CN201910793716 A CN 201910793716A CN 110417244 A CN110417244 A CN 110417244A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/083—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the ignition at the zero crossing of the voltage or the current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- 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
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- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of high frequency chopping Sofe Switch regulating circuits, the circuit includes auxiliary voltage regulation circuit of chopping, main voltage regulation circuit of chopping, PWM drive control circuit and output circuit, auxiliary voltage regulation circuit of chopping is connect with main voltage regulation circuit of chopping, output circuit is connect with main voltage regulation circuit of chopping, main voltage regulation circuit of chopping and auxiliary voltage regulation circuit of chopping are also connect with PWM drive control circuit, by the on-off of the main voltage regulation circuit of chopping of PWM drive control circuit and auxiliary voltage regulation circuit of chopping, external input high voltage direct current inputs the parallel-connection structure of auxiliary voltage regulation circuit of chopping and main voltage regulation circuit of chopping, copped wave output after output circuit by being connected on loop load.Under the control of PWM drive control circuit, adjustable DC voltage and electric current are obtained on output circuit, and realizes the Sofe Switch process of switching device under the control of PWM drive control circuit, are reduced the loss of switching device, are promoted the safety of circuit.
Description
Technical field
The invention belongs to high-frequency conversion circuit technical field, in particular to a kind of PWM regulating circuit.
Background technique
Chopper circuit is applied in specific power circuit, for specific direct current to be become another fixed voltage or adjustable
The direct current of voltage provides Switching Power Supply for circuit.
Copped wave is realized as electronic switch usually using high power semi-conductor electronic device in power circuit, in high frequency environment
Under, high power semi-conductor electronic device is often open-minded under big voltage, the lower shutdown under high current, that is to say, that under high frequency environment
Switching device be often in hard switching state.
Hard switching state has the following problems when specific power circuit is run: firstly, the high frequency on-off of switching device
Very big instantaneous power consumption can be generated in perception and capacitive load, and total power consumption by with the increase of the switching frequency of switching device and
Increase, excessive instantaneous power consumption will be so that switching device junction temperature increases, and the stability of switching device is on the hazard；Secondly, switch
Peak voltage or peak current that device high frequency on-off generates will cause the second breakdown of switching device；Finally, switching device exists
The amplitude voltage jump and current break generated when high frequency on-off will also cause serious electromagnetic interference to circuit, influence entire
The normal operation of circuit.
To overcome the problems, such as that hard switching exists, there are a variety of zero voltage switch (ZVS) and zero electricity successively both at home and abroad in this year
Stream switch (ZCS).
Ideal Zero-current soft turn off process is that electric current first drops to zero, and voltage interrupts state value in slow rise, therefore this
Switching loss in turn off process is theoretically close to zero.And Zero-voltage soft opening process ideally first drops to for voltage
Zero, electric current is raised slowly to on-state value again, therefore the switching loss of opening process is theoretically also approximately at zero.
However, how above-mentioned Sofe Switch thinking to be applied in physical circuit, switching device is soft in realization chopper circuit
Soft pass is opened, does not suggest that mature and suitable technical solution in the prior art.
Summary of the invention
To solve the above problems, the purpose of the present invention is to provide a kind of turn on process of switching device and turn off process are equal
Realize the high frequency chopping soft switch circuit of Sofe Switch process.
To achieve the above object, technical scheme is as follows:
The present invention provides a kind of high frequency chopping Sofe Switch regulating circuit, which includes PWM drive control circuit, leads and cut
Wave regulating circuit, auxiliary voltage regulation circuit of chopping and output circuit.
Under high-frequency alternating circuit, setting chopper circuit can by high-voltage dc voltage that network pressure rectifying and wave-filtering exports or electric current at
For the DC voltage and electric current for specifying adjustable amplitude, conversion process under conditions of specifically control pulse width signal input by
Control is completed.
PWM drive control circuit in this circuit includes the first pwm unit, the second pwm unit and zero
Detector is pressed, zero-pressure logic detection unit includes zero-pressure detector and NOT gate, and zero-pressure detector is for detecting its input terminal electricity
Pressure, if the input terminal voltage of zero-pressure detector is 0V, then its output end exports low level, such as the input terminal voltage of zero-pressure detector
It is not 0V, then its output end exports high level；The collector of input terminal the first IGBT pipe of connection of the zero-pressure detector, first
At the collector of IGBT pipe voltage be 0V when cause zero-pressure detector output end export logical zero, zero-pressure detector it is defeated
Outlet connects the input terminal of NOT gate, and the output end of zero-pressure detector is also connected to the first pwm unit simultaneously, NOT gate
Output end connects the second pwm unit,；External PWM signal also accesses the first pwm unit and the second pulsewidth tune simultaneously
Unit processed.Zero-pressure detector is set for detecting the collector voltage of the first IGBT pipe, as the voltage is down to error permission
When in 0V, zero-pressure detector exports logical zero, further controls the first pwm unit and the second pulsewidth modulation by NOT gate
Unit switching output.
At the time of external PWM signal input high level, the second pwm unit, which will issue, controls signal, control second
IGBT pipe is connected in limited time, when the second pwm unit terminates to export, after the 2nd IGBT manages controlled section, and the first pwm unit
Start output control signal, the conducting of the first IGBT pipe of control is until external PWM signal stops input.PWM drive control circuit is used
The first pwm unit and the second pwm unit are driven in timesharing, is guaranteed when external PWM signal has high level input,
A conducting is selected in first IGBT pipe and the 2nd IGBT pipe.
Further, the first pwm unit includes the first nor gate and the first pulse driver, the first nor gate
Input terminal connection NOT gate output end and external PWM signal, the output end of the first nor gate connects the first pulse driver
Input terminal, the first pulse driver generate the first pulse signal, the on-off of the first IGBT pipe of drive control in output end；
Second pwm unit includes that the second nor gate, the second pulse-width detector, transmission optocoupler and the second pulse are driven
Dynamic device, the output end and external PWM signal of the input terminal connection zero-pressure detector of the second nor gate, the output end of the second nor gate
The input terminal of the second pulse-width detector is connected, the output end of the output end connection transmission optocoupler of the second pulse-width detector transmits light
The output end of coupling connects the second pulse driver, and the second pulse driver generates the second pulse signal, the 2nd IGBT of drive control
The on-off of pipe；
The output end of first nor gate is also connect with the input terminal of the second nor gate；It thereby guarantees that in synchronization, first
Only signal gating all the way in pwm unit and the second pwm unit.
Second pulse-width detector is used to detect the signal width of its input terminal, such as signal of the second pulse-width detector input terminal
Width is narrower than setting width, then the signal is allowed to export by its output end, does not otherwise allow to export.Further, PWM drives
Control circuit further includes having the first photo-coupler, and the input terminal of first photo-coupler is connect with external PWM signal, and described
The output end of one photo-coupler accesses the first pwm unit and the second pwm unit simultaneously.For by external PWM signal
Keep apart with high frequency environment, prevent the pwm signal being input in circuit contaminated, therefore is set in PWM drive control circuit
The first photo-coupler is set, obtains more pure PWM input from source.Certainly, after being provided with the first photo-coupler, external PWM
Signal passes through reverse phase after the first photo-coupler.
Further, PWM drive control circuit further includes having over-current detector and the second photo-coupler, over-current detector
Test side connects the collector of the first IGBT pipe, and the output end of over-current detector is connect with the input terminal of the second photo-coupler, the
The output end of two photo-couplers connects external control centre；It is excessively high that over-current detector detects that the first IGBT pipe collector end occurs
This is then crossed stream information and reports and submits external control centre by electric current.Big voltage is usually associated with high current, in the current collection of the first IGBT pipe
The test side of extremely upper connection over-current detector is then represented if test side detects that high current occurs in the collector of the first IGBT pipe
, there is the possibility being damaged in the first IGBT pipe operation irregularity, control outside the logic judgment signal of over-current detector output at this time
Center facilitates external control centre to shut down circuit in time, prevents circuit to be further damaged and is convenient for changing.
Further, PWM drive control circuit delay switch, the input terminal and external PWM signal of delay switch are external
Postpone switching delay when pwm signal high level and opens the overcurrent logic inspection that over-current detector carries out the first IGBT pipe collector end
It surveys.It is such as direct in the moment of the first pwm unit output Continuity signal since the conducting and shutdown of IGBT pipe need the time
The collector current of the first IGBT pipe is measured, then will obtain the first IGBT pipe in high current state, such test result
It will be beyond all doubt.Delay switch is set in the application, after external high level signal input high level, when delay switch delay is appropriate
Between, movement should be completed in the first IGBT pipe in the event, and the first IGBT pipe collector electric current, such as at this time first are measured after delay
IGBT pipe collector is still in high current state, then it is assumed that the first IGBT pipe certainly exists failure, which will feed back to outside
Control centre facilitates external control centre to do accident analysis to system and further shut down control.
Main voltage regulation circuit of chopping in this circuit includes first diode and the first IGBT pipe, the cathode of first diode
The anode of connection input high voltage direct current, the anode of first diode connect the collector of the first IGBT pipe, the first IGBT pipe
Grid connects PWM drive control circuit, the cathode of the emitter connection external input high voltage direct current of the first IGBT pipe.
Further, main voltage regulation circuit of chopping further includes having first capacitor, and one end of first capacitor is connected to the first IGBT
The collector of pipe and the common end of first diode, the emitter of the other end the first IGBT pipe of connection of first capacitor and outside are defeated
Enter the common end of the cathode of high pressure.
Auxiliary voltage regulation circuit of chopping in this circuit includes the 2nd IGBT pipe, the second diode, third diode, second
Capacitor and the first inductance；The anode of the cathode connection external input high voltage direct current of third diode, the anode of third diode
The cathode of the second diode is connected, the anode of the second diode connects the 2nd IGBT pipe collector, the transmitting of the 2nd IGBT pipe
Pole connects the cathode of external input high voltage direct current, and one end of the first inductance connects collector and the two or two pole of the 2nd IGBT pipe
The common end of the anode of pipe, the public affairs of the collector of the anode and the first IGBT pipe of the other end connection first diode of the first inductance
Altogether end, the second capacitor one end connection third diode and the second diode common end common end, the second capacitor it is another
The common end of the first inductance of end connection, first diode and the first IGBT pipe.
Output circuit in this circuit includes the second inductance, third capacitor and loop load, one end of the second inductance
The anode of external input high voltage direct current, the anode of the other end connection first diode of the second inductance and the collection of the first IGBT pipe
The common end of electrode connects, and loop load is in parallel with third capacitor.
Present invention has an advantage that can be made above-mentioned using high frequency chopping Sofe Switch regulating circuit provided by the invention
Circuit obtains the straight-adjustable galvanic electricity of specified amplitude range under the control of PWM drive control circuit on output circuit, and
The Sofe Switch process that switching device is realized when pulse changes in PWM drive control circuit, reduces the loss of switching device, mentions
Rise the safety of circuit.
Detailed description of the invention
Fig. 1 is the regulating circuit realized in the specific embodiment of the invention in conjunction with leading portion rectification circuit and filter circuit
Integrated circuit architecture diagram.
Fig. 2 is the partial enlarged view of part A in Fig. 1.
Fig. 3 is the partial enlarged view of part B in Fig. 1.
Fig. 4 is the waveform diagram for the circuit realized in the specific embodiment of the invention.Wherein, a is PWM drive control circuit
Input waveform figure, b be PWM drive control circuit in the second pulse driver output waveform figure, c be PWM drive control electricity
The output waveform figure of first pulse driver in road, d are the change curve of voltage and electric current on the first IGBT pipe, e second
The change curve of voltage and electric current on IGBT pipe.
Fig. 5 is the circuit theory of high frequency chopping regulating circuit under a kind of realized small-power environment of specific embodiment
Figure.
Fig. 6 is the circuit theory of high frequency chopping regulating circuit under two kinds of the specific embodiment high-power environment realized
Figure.
Fig. 7 is the circuit theory of high frequency chopping regulating circuit under three kinds of the specific embodiment super high power environment realized
Figure.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
To achieve the above object, technical scheme is as follows:
For this circuit in specific works, circuit framework is as shown in Figs. 1-3.
The present invention provides a kind of high frequency chopping Sofe Switch regulating circuit, the circuit include auxiliary voltage regulation circuit of chopping,
Main voltage regulation circuit of chopping and output circuit.
Further, the first pwm unit includes the first nor gate and the first pulse driver, the first nor gate
Input terminal connection zero-pressure detector output end and external PWM signal, the output end of the first nor gate connects the first pulse and drives
Dynamic device, the first pulse driver generate the first pulse signal, the on-off of the first IGBT pipe of drive control；
And the second pwm unit includes the second nor gate, the second pulse-width detector, transmission optocoupler and the second pulse
Driver, the output end and external PWM signal of the input terminal connection zero-pressure detector of second nor gate, described second or non-
The output end of door connects the input terminal of the second pulse-width detector, the output end connection transmission optocoupler of second pulse-width detector
The output end of output end, the transmission optocoupler connects the second pulse driver, and second pulse driver generates the second pulse
Signal, the on-off of the 2nd IGBT pipe IGBT2 of drive control.
PWM drive control circuit further includes having the first photo-coupler, the input terminal and external PWM signal of the first photo-coupler
The output end of connection, the first photo-coupler accesses the first pwm unit and the second pwm unit simultaneously.For will be external
Pwm signal is kept apart with high frequency environment, prevents the pwm signal being input in circuit contaminated, therefore in PWM drive control electricity
First photo-coupler is set in road, obtains more pure PWM input from source.
PWM drive control circuit further includes having over-current detector and the second photo-coupler, and the test side of over-current detector connects
The collector of the first IGBT pipe IGBT1 is connect, the output end of over-current detector is connect with the input terminal of the second photo-coupler, the second light
The output end of coupler connects external control centre；Over-current detector detects the first IGBT pipe IGBT1 collector terminal and transmitting
There is excessive current between extreme this then crossed stream information reporting and submitting external control centre.Big voltage is usually associated with high current, In
The test side that over-current detector is connected on the collector of first IGBT pipe IGBT1, as test side detects the first IGBT pipe IGBT1
Collector there is high current, then represent the first IGBT pipe IGBT1 operation irregularity, there are impaired possibility, over-current detection at this time
Device exports logic judgment signal and directly stops external PWM signal input immediately, and is transported to external control centre, facilitates external control
Circuit or further operating are shut down in center processed in time, and circuit is prevented further to be damaged.
PWM drive control circuit delay switch, the input terminal and external PWM signal of delay switch, the high electricity of external PWM signal
The overcurrent logic detection that over-current detector carries out the first IGBT pipe IGBT1 collector terminal is opened in usually delay switch delay, setting
The purpose of delay switch is, after external PWM signal appearance, the first IGBT pipe IGBT1 and the 2nd IGBT pipe IGBT2's itself
There is delay in on-off, circuit just detects its overcurrent after should waiting the first IGBT pipe IGBT1 and the 2nd complete on-off of IGBT pipe IGBT2
Logic.
Main voltage regulation circuit of chopping includes first diode D1 and the first IGBT pipe IGBT1, the cathode of first diode D1
The anode of connection external high pressure direct current, the collector of the first IGBT pipe IGBT1 of cathode connection of first diode D1, first
The grid of IGBT pipe IGBT1 connects PWM drive control circuit, the external specified high pressure of the emitter connection of the first IGBT pipe IGBT1
The cathode of direct current.
Main voltage regulation circuit of chopping further includes having first capacitor C3, and one end of first capacitor C3 is connected to the first IGBT pipe
The common end of IGBT1 and first diode D1, the other end of first capacitor C3 connect the first IGBT pipe IGBT1 and external specified width
It is worth the common end of the cathode of high voltage direct current.
Assisting voltage regulation circuit of chopping includes the 2nd IGBT pipe IGBT2, the second diode D2, third diode D3, second
Capacitor C2 and the first inductance L2；The anode of the external specified amplitude high voltage direct current of cathode connection connection of third diode D3, the
The anode of three diode D3 connects the cathode of the second diode D2, and the anode of the second diode D2 connects the 2nd IGBT pipe
IGBT2 collector, the cathode of the external specified amplitude high voltage direct current of the emitter connection of the 2nd IGBT pipe IGBT2, the first inductance
One end of L2 connects the common end of the first IGBT pipe IGBT1 and first diode D1, the other end connection second of the first inductance L2
The common end of diode D2 and the 2nd IGBT pipe IGBT2, one end connection third diode D3 of the second capacitor C2 and the two or two pole
The common end of pipe D2, the other end of the second capacitor C2 connect the common end of the first inductance L2 and first diode D1.
Output circuit includes one end connection of loop load RL, the second inductance L1 and third capacitor C1, the second inductance L1
The anode of external high pressure direct current, the public affairs of the other end connection first diode D1 and the first IGBT pipe IGBT1 of the second inductance L1
End connection altogether, one end of third capacitor C1 connect the common end of the anode of the second inductance L1 and external high pressure direct current, third electricity
Hold the common end of other end connection the second inductance L1 and the first IGBT pipe IGBT1 of C1, loop load RL and third inductance C1 are simultaneously
Connection.
After external 380V three-phase alternation electricity input, it is non-adjustable to become about 530V for the arrangement of rectified circuit and filter capacitor
DC voltage, after the nonadjustable DC voltage of the 530V is input in this circuit, will generate 0~530V on output circuit can
The DC voltage of amplitude modulation value supplies load.
After external PWM signal inputs PWM drive control circuit, P1 will be exported from the first arteries and veins driver, or from second
P2 is exported in pulse driver, the waveform diagram of external PWM signal, P1 and P2 is as shown in Figure 4.
External PWM signal starts to input circuit, within 0~T1 time, external PWM signal input low level, at this
Between in section the first pulse driver and the second pulse driver exported without pulse width signal, the first IGBT pipe IGBT1 and second
The electric current flowed through on IGBT pipe IGBT2 is 0.The energy formerly stored on the second inductance at this time flows through loop load and the one or two
It is formed into a loop after pole pipe D1, therefore in 0~T1 time, is provided as the electric current on the loop load of loop load by inductance.And
At the same time, since the first IGBT pipe IGBT1 and the 2nd IGBT pipe IGBT2 are in off state at this time, in the time
It keeps stablizing high voltage at the collector of interior first IGBT pipe IGBT1 and the collector of the 2nd IGBT pipe IGBT2.
At the T1 moment, external PWM signal overturning, to circuit input high level, PWM drive control circuit will keep the at this time
One pulse driver is motionless and high level is exported from the second pulse driver, the 2nd controlled conducting of IGBT pipe IGBT2 at this time, this
When the first inductance L2 on flow through electric current, since inductance itself hinders the characteristic of curent change, then the current collection of the 2nd IGBT pipe IGBT2
Electric current at pole is slowly soaring since the T1 moment.In the moment of the 2nd controlled conducting of IGBT pipe IGBT2 of T1 moment, collector
Voltage between emitter is rapidly decreased to 0V under the control of driving pulse, therefore at the T1 moment, the 2nd IGBT pipe is realized
Intimate zero current passing (ZCS).
During T1~T2, P2 keeps output, and the 2nd IGBT pipe IGBT2 is held on, within the time, due to first
Inductance L2 to the inhibition of electric current so that at the collector of the 2nd IGBT pipe IGBT2 electric current (i.e. the 2nd IGBT pipe IGBT2's
Electric current) slowly rise, then current potential declines at the first IGBT pipe IGBT1 collector, thus causes first within T1~T2 time
Voltage slowly declines at the collector of IGBT pipe IGBT1, and is reduced to 0V at the T2 moment.
At the T2 moment, the first pulse driver of PWM drive control circuit stops output, the first IGBT pipe at this time
Voltage is 0V, and zero-pressure detector detects that it is 0V that voltage is held between the first IGBT pipe IGBT1 collector and emitter, at this time logic
Level is 0, inputs the input terminal of the second NOT gate, and the second pulse driver is forced to become 0V.Pulse driver starts to export P1, the
One IGBT pipe IGBT1 conducting, therefore at the T2 moment, the first IGBT pipe IGBT1 realizes intimate no-voltage (ZVS) conducting.And by
Stop exporting in the second pulse driver at this time, the 2nd IGBT pipe IGBT2 is begun to turn off, and flows through the electric current on the first inductance at this time
Reduction trend to occur, thus the first inductance L2 by for inductance to the inhibition of curent change to the second capacitor C2 and second
Diode D2 discharges, and the electric current on the 2nd IGBT pipe IGBT2 reduces rapidly, and is down to 0A at the T3 moment, and in the second inductance L1
Electric current gradually decrease during, since the first inductance L2 discharges to the second capacitor C2, voltage on the second capacitor C2 occurs
Variation, the inhibition that the second capacitor C2 convert for capacitance versus voltage, will slowly be promoted the 2nd IGBT pipe IGBT2 collector and
Voltage between emitter, but the clamping action due to existing simultaneously third diode D3, the voltage of the 2nd IGBT pipe IGBT2 is not
Can infinitely it rise, the voltage at the second both ends capacitor C2 is also clamped to the DC voltage value with input, is the first IGBT pipe IGBT1
Zero-pressure shutdown is prepared, only when reaching identical as outside 530V DC voltage amplitude, the collector of the 2nd IGBT pipe IGBT2
Voltage keeps stablizing, therefore within T2~T3 time, the 2nd IGBT pipe IGBT2 also achieves intimate zero voltage turn-off (ZVS), this
In the process, the second capacitor C2 is gradually filled with electricity.
During T2~T4, P1 keeps output, and the first IGBT pipe IGBT1 is held on, the second electricity in output circuit
Feel the LC filter circuit of L1 and third capacitor C1 composition, input dc power pressure is directly output to the input terminal of LC filter circuit, from
And give the energy to load.
At the T4 moment, external PWM signal overturning, to circuit input low level, the first pulse driver and the second arteries and veins at this time
Driver is rushed to export without pulse width signal, the first IGBT pipe IGBT1 in the controlled cut-off of T4 moment, flow through the first IGBT pipe
The electric current of IGBT1 declines rapidly and is down to 0A, and the current potential at the collector of the first IGBT pipe IGBT1, which exists, steeply rises trend,
To hinder the trend, the electricity in the second capacitor starts to release, and first capacitor C2 is started to charge, and hinders the first IGBT pipe IGBT1
Voltage rises between collector and emitter, prevents the voltage of the first IGBT pipe IGBT1 from increasing suddenly, realizes the first IGBT pipe IGBT1
Intimate zero voltage turn-off (ZVS) is realized at the T4 moment.
More than, external PWM signal is to inputting a complete cycle in circuit, the first IGBT pipe IGBT1 and the in the period
Two IGBT pipe IGBT2 realize respectively it is soft open with soft pass, reduce the switching loss of switching device to the full extent, protecting
Protection circuit, improve circuit safety and stability while, reduce circuit loss to the full extent.
To realize that foregoing circuit principle is applied in different capacity level circuitry, the present invention will provide three kinds of different embodiment party
Formula is as follows, is laundering period corresponding power application environment below in three kinds of different embodiments, will be mainly for its respective master
Voltage regulation circuit of chopping and auxiliary voltage regulation circuit of chopping are adjusted, and output circuit is remained unchanged with PWM drive control circuit, because
This, will be mainly for main voltage regulation circuit of chopping and auxiliary chopper control when illustrating the specific embodiment under different capacity environment
Circuit is illustrated, other circuits repeat no more.
Specific embodiment 1:
Referring to Fig. 5, the copped wave that the regulating circuit that present embodiment is realized is suitable under middle low power environment is soft
Switch pressure regulation.
Include in the circuit that present embodiment is realized main voltage regulation circuit of chopping, auxiliary voltage regulation circuit of chopping,
Output circuit and PWM drive control circuit.Auxiliary voltage regulation circuit of chopping is connect with main voltage regulation circuit of chopping, and output circuit is cut with master
The connection of wave regulating circuit, main voltage regulation circuit of chopping and auxiliary voltage regulation circuit of chopping are also connect with PWM drive control circuit, by
The on-off of the main voltage regulation circuit of chopping of PWM drive control circuit and auxiliary voltage regulation circuit of chopping；The specified high straightening of amplitude in outside
Galvanic electricity inputs the parallel-connection structure of auxiliary voltage regulation circuit of chopping and main voltage regulation circuit of chopping, and external loading is connected to output circuit
On.
Wherein, in the chopper circuit that present embodiment is realized, Auxiliary chopper circuit includes clamp diode
D13, auxiliary capacitor C12, auxiliary induction L12, auxiliary the first IGBT pipe IGBT121 of copped wave and auxiliary the 2nd IGBT of copped wave pipe
The anode of the cathode connection external power supply of IGBT122, clamp diode D13, the anode connection auxiliary copped wave of clamp diode D13
The collector of first IGBT pipe IGBT121, grid connection auxiliary the first IGBT of copped wave of auxiliary the first IGBT pipe IGBT121 of copped wave
The emitter of pipe IGBT121 assists the emitter of the first IGBT pipe IGBT121 of copped wave also to manage with auxiliary the 2nd IGBT of copped wave
The collector of IGBT122 connects, and the grid of auxiliary the 2nd IGBT pipe IGBT122 of copped wave is connect with PWM drive control circuit, assists
The cathode of the emitter connection external power supply of the 2nd IGBT pipe IGBT122 of copped wave.
Main chopper circuit includes main the first IGBT pipe IGBT111 of copped wave and the 2nd IGBT pipe IGBT112 of main copped wave and master
The anode of the collector connection external power supply of copped wave capacitor C13, main the first IGBT pipe IGBT111 of copped wave, grid emit with it
Extremely short to connect, emitter is also connect with the collector of main the 2nd IGBT pipe IGBT112 of copped wave, main the 2nd IGBT of copped wave pipe
IGBT112 grid is connect with PWM drive control circuit, and emitter connects the cathode of external power supply.The one of main copped wave capacitor C13
End connects the collector of main the 2nd IGBT pipe IGBT112 of copped wave, and the other end connects the hair of main the 2nd IGBT pipe IGBT112 of copped wave
Emitter-base bandgap grading.
One end of auxiliary induction L12 connects the collector of main the 2nd IGBT pipe IGBT112 of copped wave, other end connection auxiliary
The collector of the 2nd IGBT pipe IGBT122 of copped wave, one end connection auxiliary induction L12 of auxiliary capacitor C12 and main copped wave second
The common end of IGBT pipe IGBT112, the other end connect clamp diode D13 and assist the public affairs of the first IGBT pipe IGBT121 of copped wave
End altogether.
Under small-power environment, main the first IGBT pipe IGBT111 of copped wave and auxiliary the first IGBT pipe IGBT121 of copped wave are using half
Bridge architecture.Wherein, the first IGBT pipe IGBT121 of copped wave will be assisted and assist bridge arm on the 2nd IGBT pipe IGBT122 of copped wave
The short circuit respectively of grid and collector, only in original circuit of diode in place of its inside first diode and the two or two pole
Pipe facilitates main chopper circuit and Auxiliary chopper circuit to arrange and forms, and reduces the molding volume of circuit to the full extent.
Specific embodiment 2:
Referring to Fig. 6, the chopper circuit realized in present embodiment is suitable for powerful high frequency chopping pressure regulation
Circuit.
It include main voltage regulation circuit of chopping, auxiliary chopper control electricity in the chopper circuit that present embodiment is realized
Road, output circuit and PWM drive control circuit.Auxiliary voltage regulation circuit of chopping connect with main voltage regulation circuit of chopping, output circuit and
Main voltage regulation circuit of chopping connection, main voltage regulation circuit of chopping and auxiliary voltage regulation circuit of chopping are also connect with PWM drive control circuit,
By the on-off of the main voltage regulation circuit of chopping of PWM drive control circuit and auxiliary voltage regulation circuit of chopping；The specified amplitude high pressure in outside
Direct current inputs the parallel-connection structure of auxiliary voltage regulation circuit of chopping and main voltage regulation circuit of chopping, and external loading is connected to output circuit
On.
Wherein, in this embodiment, Auxiliary chopper circuit includes auxiliary copped wave IGBT pipe IGBT22, auxiliary two
The cathode of pole pipe D22, clamp diode D23, auxiliary capacitor C22 and auxiliary induction L22, clamp diode D23 connect external electrical
The anode in source, the cathode of the anode connection booster diode D22 of clamp diode D23, the cathode connection of booster diode D22 are auxiliary
The collector of copped wave IGBT pipe IGBT22 is helped, the grid of auxiliary copped wave IGBT pipe IGBT22 connects PWM drive control circuit, auxiliary
The cathode of the emitter connection external power supply of copped wave IGBT pipe IGBT22.
Main voltage regulation circuit of chopping includes that there are two main copped wave modules, and each main copped wave module includes main copped wave first
IGBT pipe IGBT211, main copped wave the 2nd IGBT pipe IGBT212 and main copped wave capacitor C23, wherein the first IGBT of main copped wave is managed
The collector of IGBT211 is connect with the anode of external power supply, and grid is shorted with its emitter, and emitter is cut with master
The collector of the 2nd IGBT pipe IGBT212 of wave connects, the grid of main the 2nd IGBT pipe IGBT212 of copped wave with PWM drive control
Module connection, emitter are connect with the cathode of external power supply.
The emitter of the first IGBT pipe IGBT211 in two main copped wave modules is also connected, and draws auxiliary copped wave connecting pin.
One end connection auxiliary copped wave connecting pin of auxiliary induction C22, other end connection auxiliary copped wave IGBT pipe IGBT22
Collector, auxiliary capacitor C22 one end connection auxiliary induction and assist copped wave connecting pin common point, the other end connection auxiliary
The common end of diode D22 and auxiliary copped wave IGBT pipe IGBT22.
Under high-power environment, two main copped wave modules are set, powerful copped wave demand is suitable for, and at the same time, it will
The grid of main the first IGBT pipe IGBT211 of copped wave and emitter are shorted in main copped wave module, which can be used as to diode, convenient
Circuit molding.
Specific embodiment 3:
Referring to Fig. 7, present embodiment is suitable for the high frequency chopping regulating circuit of super high power.
Include in the circuit that present embodiment is realized main voltage regulation circuit of chopping, auxiliary voltage regulation circuit of chopping,
Output circuit and PWM drive control circuit.Auxiliary voltage regulation circuit of chopping is connect with main voltage regulation circuit of chopping, and output circuit is cut with master
The connection of wave regulating circuit, main voltage regulation circuit of chopping and auxiliary voltage regulation circuit of chopping are also connect with PWM drive control circuit, by
The on-off of the main voltage regulation circuit of chopping of PWM drive control circuit and auxiliary voltage regulation circuit of chopping；The specified high straightening of amplitude in outside
Galvanic electricity inputs the parallel-connection structure of auxiliary voltage regulation circuit of chopping and main voltage regulation circuit of chopping, and external loading is connected to output circuit
On.
In the circuit that present embodiment is realized, Auxiliary chopper circuit includes several auxiliary copped wave modules,
Each auxiliary copped wave module include clamp diode D33, booster diode D32, auxiliary induction L32, auxiliary capacitor C32 and
Assist copped wave IGBT pipe IGBT32, the anode of the cathode connection external power supply of each clamp diode D33, clamp diode D32
Anode connection booster diode D32 cathode, booster diode D32 cathode connection auxiliary copped wave IGBT pipe IGBT32 collection
The grid of electrode, auxiliary copped wave IGBT pipe IGBT32 connects PWM drive control circuit, assists the transmitting of copped wave IGBT pipe IGBT32
The cathode of pole connection external power supply.
One end of each auxiliary capacitor C32 is all connected with corresponding auxiliary copped wave IGBT pipe IGBT32's and booster diode D32
The collector of common end, the other end are all connected with one end of auxiliary induction C32, and the other end of auxiliary induction C32 is all connected with auxiliary
The collector of copped wave IGBT pipe IGBT32, the common end of auxiliary capacitor C32 and auxiliary induction L32 are also sequentially connected with and draw master and cut
Wave connecting pin.
Main chopper circuit includes several main copped wave modules, and each main copped wave module includes main the first IGBT of copped wave
The 2nd IGBT pipe IGBT312 of pipe IGBT311 and main copped wave, wherein the collector of the first IGBT pipe IGBT311 of main copped wave is and outside
The anode connection of portion's power supply, grid are shorted with its emitter, and emitter is with main the 2nd IGBT pipe IGBT312's of copped wave
Collector connection, the grid of main the 2nd IGBT pipe IGBT312 of copped wave connect with PWM drive control module, emitter with
The cathode of external power supply connects.
The emitter of the first IGBT pipe IGBT311 in each main copped wave module is also sequentially connected, and is drawn auxiliary copped wave and is connected
Connect end.
Main copped wave connecting pin is connect with auxiliary copped wave connecting pin.
Under super high power environment, multiple main copped wave modules and multiple auxiliary copped wave modules are set, powerful cut is suitable for
Wave demand, and at the same time, the grid of the first IGBT pipe IGBT311 of copped wave main in main copped wave module and emitter are shorted, it can
The pipe is used as diode, circuit is facilitated to form.Technical staff can be auxiliary according to the main copped wave module pair of power demand additions and deletions of circuit
Help the quantity of copped wave module.
Present invention has an advantage that can be made above-mentioned using high frequency chopping Sofe Switch regulating circuit provided by the invention
Circuit obtains the straight-adjustable galvanic electricity of specified amplitude range under the control of PWM drive control circuit on output circuit, and
The Sofe Switch process that switching device is realized when pulse changes in PWM drive control circuit, reduces the loss of switching device, mentions
Rise the safety of circuit.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (10)
1. a kind of high frequency chopping Sofe Switch regulating circuit, which is characterized in that the circuit includes that voltage regulation circuit of chopping, master is assisted to cut
Wave regulating circuit, PWM drive control circuit and output circuit, the auxiliary voltage regulation circuit of chopping and main voltage regulation circuit of chopping connect
It connects, the output circuit is connect with main voltage regulation circuit of chopping, and the main voltage regulation circuit of chopping and auxiliary voltage regulation circuit of chopping are also equal
It is connect with PWM drive control circuit, by the main voltage regulation circuit of chopping of PWM drive control circuit and assists voltage regulation circuit of chopping
On-off；External input high voltage direct current inputs the parallel-connection structure of auxiliary voltage regulation circuit of chopping and main voltage regulation circuit of chopping, copped wave
Output obtains adjustable output voltage by being connected in circuit load after output circuit in circuit load.
2. high frequency chopping Sofe Switch regulating circuit as described in claim 1, which is characterized in that the main voltage regulation circuit of chopping packet
First diode and the first IGBT pipe have been included, the cathode of the first diode connects the anode of external input high voltage direct current,
The anode of the first diode connects the collector of the first IGBT pipe, the grid connection PWM driving control of the first IGBT pipe
Circuit processed, the cathode of the emitter connection input high voltage direct current of the first IGBT pipe.
3. high frequency chopping Sofe Switch regulating circuit as claimed in claim 2, which is characterized in that the main voltage regulation circuit of chopping is also
It include first capacitor, one end of the first capacitor is connected to the first IGBT pipe and the common end of first diode, and described the
The other end of one capacitor connects the emitter of the first IGBT pipe and the common end of external input high voltage direct current cathode.
4. high frequency chopping Sofe Switch regulating circuit as claimed in claim 3, which is characterized in that the auxiliary voltage regulation circuit of chopping
It include the 2nd IGBT pipe, the second diode, third diode, the second capacitor and the first inductance；The yin of the third diode
Pole connects the anode of external input high voltage direct current, and the anode of the third diode connects the cathode of the second diode, institute
The anode for stating the second diode connects the 2nd IGBT pipe collector, and the emitter of the 2nd IGBT pipe connects external input high pressure
The grid of the cathode of direct current, the 2nd IGBT pipe connects PWM drive control circuit；One end connection the of first inductance
The other end of the common end of the anode of the collector and the second diode of two IGBT pipes, first inductance connects first diode
Anode and the first IGBT pipe collector common end, one end connection third diode and the two or two pole of second capacitor
The other end of the common end of the common end of pipe, second capacitor connects the first inductance, first diode and the first IGBT pipe
Common end.
5. high frequency chopping Sofe Switch regulating circuit as claimed in claim 4, which is characterized in that the output circuit includes
Two inductance, third capacitor and loop load, the anode of one end connection external input high voltage direct current of second inductance, institute
State one end of the other end connection third capacitor of the second inductance, the anode of the other end connection first diode of the third capacitor
With the common end of the collector of the first IGBT pipe, the loop load is in parallel with third capacitor.
6. high frequency chopping Sofe Switch regulating circuit as claimed in claim 5, which is characterized in that the PWM drive control circuit packet
The first pwm unit, the second pwm unit and zero-pressure detector are included, the zero-pressure logic detection unit includes
Zero-pressure detector and NOT gate, the zero-pressure detector is for detecting its input terminal voltage, such as the input terminal voltage of zero-pressure detector
For 0V, then its output end exports low level, and if the input terminal voltage of zero-pressure detector is not 0V, then the output of its output end is high electric
It is flat；The input terminal of the zero-pressure detector connects the collector of the first IGBT pipe, electricity at the collector of the first IGBT pipe
Pressure causes the output end of zero-pressure detector to export logical zero when being 0V, the output end of the zero-pressure detector connects the defeated of NOT gate
Enter end, the output end of the zero-pressure detector is also connected to the first pwm unit simultaneously, the output end connection of NOT gate the
Two pwm units；External PWM signal also accesses the first pwm unit and the second pwm unit simultaneously.
7. high frequency chopping Sofe Switch regulating circuit as claimed in claim 6, which is characterized in that the first pwm unit packet
The first nor gate and the first pulse driver, the output end of the input terminal connection NOT gate of first nor gate and outside are included
Pwm signal, the output end of first nor gate connect the input terminal of the first pulse driver, and first pulse driver exists
Output end generates the first pulse signal, the on-off of the first IGBT pipe of drive control；
Second pwm unit includes that the second nor gate, the second pulse-width detector, transmission optocoupler and the second pulse are driven
Dynamic device, the output end and external PWM signal of the input terminal connection zero-pressure detector of second nor gate, second nor gate
Output end connect the second pulse-width detector input terminal, second pulse-width detector output end connection transmission optocoupler it is defeated
Outlet, the output end of the transmission optocoupler connect the second pulse driver, and second pulse driver generates the second pulse letter
Number, the on-off of the 2nd IGBT pipe of drive control；
The output end of first nor gate is also connect with the input terminal of the second nor gate；
Second pulse-width detector is used to detect the signal width of its input terminal, such as signal of the second pulse-width detector input terminal
Width is narrower than setting width, then the signal is allowed to export by its output end, does not otherwise allow to export.
8. high frequency chopping Sofe Switch regulating circuit as claimed in claim 7, which is characterized in that the PWM drive control circuit
It further include having the first photo-coupler, the input terminal of first photo-coupler is connect with external PWM signal, first optical coupling
The output end of device accesses the first pwm unit and the second pwm unit simultaneously.
9. high frequency chopping Sofe Switch regulating circuit as claimed in claim 8, which is characterized in that the PWM drive control circuit
It further include having over-current detector and the second photo-coupler, the test side of the over-current detector connects the current collection of the first IGBT pipe
Pole, the output end of the over-current detector are connect with the input terminal of the second photo-coupler, the output end of second photo-coupler
Connect external control centre；
The over-current detector is used to detect the current amplitude of its input terminal, as the current amplitude of over-current detector input terminal is higher than
Its setting electric current amplitude, then its output end exports alarm signal, and otherwise over-current detector does not export；
Second pulse-width detector is also connected with over-current detector, and the signal width of such as input terminal of the second pulse-width detector is wider than
Width is set, then the output end for triggering over-current detector issues alarm signal.
10. high frequency chopping Sofe Switch regulating circuit as claimed in claim 9, which is characterized in that the PWM drive control circuit
Delay switch, the input terminal and external PWM signal of the delay switch, delay switching delay is opened when external PWM signal high level
Open over-current detector.
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| CN201910793716.4A CN110417244A (en) | 2019-08-27 | 2019-08-27 | A kind of high frequency chopping Sofe Switch regulating circuit |
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| CN201910793716.4A CN110417244A (en) | 2019-08-27 | 2019-08-27 | A kind of high frequency chopping Sofe Switch regulating circuit |
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- 2019-08-27 CN CN201910793716.4A patent/CN110417244A/en active Pending
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| CN201181902Y (en) * | 2008-03-12 | 2009-01-14 | 北方工业大学 | Soft switch BUCK converter |
| CN101303796A (en) * | 2008-06-26 | 2008-11-12 | 镇江华东电力设备制造厂 | System for transmitting control signal of high voltage frequency converter power unit |
| US20110133554A1 (en) * | 2008-09-12 | 2011-06-09 | Mge Ups Systems | Converter device and uninterruptible power supply equipped wtih such a device |
| CN210431215U (en) * | 2019-08-27 | 2020-04-28 | 深圳市双平电源技术有限公司 | High-frequency chopping soft-switching voltage regulating circuit |
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