CN107342692A - A kind of AC chopping PWM dead-zone generating circuits - Google Patents
A kind of AC chopping PWM dead-zone generating circuits Download PDFInfo
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- CN107342692A CN107342692A CN201611178960.2A CN201611178960A CN107342692A CN 107342692 A CN107342692 A CN 107342692A CN 201611178960 A CN201611178960 A CN 201611178960A CN 107342692 A CN107342692 A CN 107342692A
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The AC chopping PWM dead-zone generating circuits of the present invention, including 220V AC signals process circuit and pwm signal process circuit, 220V AC signal process circuits input connects the phase line and zero line of 220V AC signals, the output end of the signal input part connection 220V AC signal process circuits of pwm signal process circuit, pwm signal process circuit another input connection pwm signal PWM_IN, the 3rd signal input part connection input protection signal PRO_IN of pwm signal process circuit, the output end of pwm signal process circuit exports four road drive signal PWM_OUT1, PWM_OUT2, PWM_OUT3, PWM_OUT4.The PWM dead times of this circuit copped wave and afterflow are directly triggered to obtain by hardware, can turn off PWM drivings during zero cross signal exception rapidly.
Description
Technical field
The present invention relates to a kind of pwm control circuit, specifically a kind of AC chopping PWM dead-zone generating circuits.
Background technology
The PWM copped waves of voltage regulation circuit of chopping and afterflow dead band are all to set dead time by MCU at present, and such a mode needs
4 road pwm signals drive the copped wave of positive-negative half-cycle and afterflow signal, once there are PWM program or the output to be all the way disturbed just
IGBT driving tubes can be burnt out, and such a PWM dead zone functions can not change with the change of external voltage, it is fast on defencive function
Degree is slow.
The content of the invention
In order to solve the above problems, the invention provides a kind of AC chopping PWM dead-zone generating circuits, this circuit copped wave and
The PWM dead times of afterflow are directly triggered to obtain by hardware, PWM drivings can be turned off during zero cross signal exception rapidly, for MCU
Only need all the way pwm signal export, coordinate logic gates can be to drive the chopping signal of positive-negative half-cycle and afterflow signal.
The present invention uses following technical scheme：A kind of AC chopping PWM dead-zone generating circuits, it is characterised in that including
220V AC signals process circuit and pwm signal process circuit, the connection 220V exchanges of 220V AC signal process circuits input
The phase line and zero line of signal, a signal input part of pwm signal process circuit connect the defeated of 220V AC signal process circuits
Go out end, pwm signal process circuit another input connection pwm signal PWM_IN, the 3rd signal of pwm signal process circuit
Input connection input protection signal PRO_IN, the four road drive signal PWM_OUT1 of output end output of pwm signal process circuit,
PWM_OUT2、PWM_OUT3、PWM_OUT4。
Further, described 220V AC signals process circuit includes optocoupler U2, optocoupler U3, optocoupler U4, optocoupler U5, light
The pins of coupling U2 first meet electric capacity C1 one end, AC_N signal ends, electric capacity C1 other ends difference connecting resistance R1 one end, electric capacity C2 mono- respectively
End, optocoupler U2 second pins, the pins of optocoupler U3 first, another termination AC_L signal ends of resistance R1, the electric capacity C2 other ends connect respectively
AC_N signal ends, optocoupler U3 second pins, the pins of optocoupler U2 the 4th meet VCC voltages, the pins of optocoupler U2 the 3rd difference connecting resistance R3
One end, electric capacity C5 one end, pwm signal process circuit signal input part, the resistance R3 other ends, the electric capacity C5 other ends are grounded, light
The pins of coupling U3 the 4th connect VCC voltages, the pins of optocoupler U3 the 3rd difference connecting resistance R4 one end, electric capacity C6 one end, pwm signal processing electricity
Road signal input part, the resistance R4 other ends, the electric capacity C6 other ends are grounded；
The pins of optocoupler U4 first meet electric capacity C3 one end, AC_N signal ends, electric capacity C3 other ends difference connecting resistance R2 mono- respectively
End, electric capacity C4 one end, optocoupler U4 second pins, the pins of optocoupler U5 first, another termination AC_L signal ends of resistance R2, electric capacity C4 are another
One end connects AC_N signal ends, optocoupler U5 second pins respectively, and the pins of optocoupler U4 the 4th connect VCC voltages, the pins point of optocoupler U4 the 3rd
Other connecting resistance R5 one end, electric capacity C7 one end, pwm signal process circuit signal input part, the resistance R5 other ends, the electric capacity C7 other ends
It is grounded, the pins of optocoupler U5 the 4th meet VCC voltages, the pins of optocoupler U5 the 3rd difference connecting resistance R6 one end, electric capacity C8 one end, PWM
Signal processing circuit signal input part, the resistance R6 other ends, the electric capacity C8 other ends are grounded.
Further, optocoupler U2, optocoupler U3, optocoupler U4, optocoupler U5 are PS2501 photoelectrical couplers.
Further, described pwm signal process circuit include phase inverter U1, with door chip U6, OR gate chip U7, it is anti-phase
The pins of device U1 first meet signal end PWM_IN, and phase inverter U1 second pins connect and the first pins of door chip U6 and door chip respectively
The pins of U6 the 4th, the pins of phase inverter U1 the 3rd connect the pins of optocoupler U2 the 3rd, and the pins of phase inverter U1 the 4th meet OR gate chip U7 the tenth
Pin, the pins of phase inverter U1 the 5th connect the pins of optocoupler U3 the 3rd, and the pins of phase inverter U1 the 6th connect the pins of OR gate chip U7 the 13rd；
The pins of optocoupler U4 the 3rd are connect with door chip U6 second pins, meeting optocoupler U5 the 3rd with the pins of door chip U6 the 5th draws
Pin, OR gate chip U7 second pins are connect with the pins of door chip U6 the 3rd, and OR gate chip U7 the 5th is met with the pins of door chip U6 the 6th
Pin；
The first pins of OR gate chip U7, the 4th pin, the 9th pin, the 12nd pin are all connected with protection signal input
PRO_IN, OR gate chip U7 the 3rd pin connect output end PWM_OUT1, the pins of OR gate chip U7 the 6th connection output end PWM_
OUT2, OR gate chip U7 the 8th pin connect output end PWM_OUT3, the pins of OR gate chip U7 the 11st connection output end PWM_
OUT4。
Further, phase inverter U1 model hex inverter 74F04.
Further, 74F08 chips are used with door chip U6.
Further, OR gate chip U7 uses 74F32 chips.
The beneficial effects of the invention are as follows：The PWM dead times of this circuit copped wave and afterflow are directly triggered to obtain by hardware, mistake
PWM drivings can be turned off during zero-signal exception rapidly, pwm signal output all the way is only needed for MCU, coordinates logic gates just
The chopping signal and afterflow signal of positive-negative half-cycle can be driven.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the present invention.
Embodiment
A kind of AC chopping PWM dead-zone generating circuits as shown in Figure 1, including 220V AC signals process circuit and PWM
Signal processing circuit.
220V AC signals process circuit includes optocoupler U2, optocoupler U3, optocoupler U4, optocoupler U5, the pins point of optocoupler U2 first
Electric capacity C1 one end, AC_N signal ends, electric capacity C1 other ends difference connecting resistance R1 one end, electric capacity C2 one end, optocoupler U2 second are not met
Pin, the pins of optocoupler U3 first, another termination AC_L signal ends of resistance R1, the electric capacity C2 other ends connect AC_N signal ends, light respectively
Coupling U3 second pins, the pins of optocoupler U2 the 4th meet VCC voltages, the pins of optocoupler U2 the 3rd difference connecting resistance R3 one end, electric capacity C5 mono-
End, pwm signal process circuit signal input part, the resistance R3 other ends, the electric capacity C5 other ends are grounded, and the pins of optocoupler U3 the 4th connect
VCC voltages, the pins of optocoupler U3 the 3rd difference connecting resistance R4 one end, electric capacity C6 one end, pwm signal process circuit signal input part,
The resistance R4 other ends, the electric capacity C6 other ends are grounded；The pins of optocoupler U4 first connect electric capacity C3 one end, AC_N signal ends respectively, electricity
Hold C3 other ends difference connecting resistance R2 one end, electric capacity C4 one end, optocoupler U4 second pins, the pins of optocoupler U5 first, resistance R2 is another
One termination AC_L signal ends, the electric capacity C4 other ends connect AC_N signal ends, optocoupler U5 second pins respectively, and the pins of optocoupler U4 the 4th connect
VCC voltages, the pins of optocoupler U4 the 3rd difference connecting resistance R5 one end, electric capacity C7 one end, pwm signal process circuit signal input part,
The resistance R5 other ends, the electric capacity C7 other ends are grounded, and the pins of optocoupler U5 the 4th connect VCC voltages, and the pins of optocoupler U5 the 3rd connect respectively
Resistance R6 one end, electric capacity C8 one end, pwm signal process circuit signal input part, the resistance R6 other ends, the electric capacity C8 other ends connect
Ground.Wherein, optocoupler U2, optocoupler U3, optocoupler U4, optocoupler U5 are PS2501 photoelectrical couplers.
Pwm signal process circuit includes phase inverter U1, connect with door chip U6, OR gate chip U7, phase inverter U1 first pin
Signal end PWM_IN, phase inverter U1 second pin connect respectively with the first pins of door chip U6, with the pins of door chip U6 the 4th, it is anti-phase
The pins of device U1 the 3rd connect the pins of optocoupler U2 the 3rd, and the pins of phase inverter U1 the 4th meet the pins of OR gate chip U7 the tenth, phase inverter U1
Five pins connect the pins of optocoupler U3 the 3rd, and the pins of phase inverter U1 the 6th connect the pins of OR gate chip U7 the 13rd；With door chip U6 second
Pin connects the pins of optocoupler U4 the 3rd, connects the pins of optocoupler U5 the 3rd with the pins of door chip U6 the 5th, is connect with the pins of door chip U6 the 3rd
OR gate chip U7 second pins, the pins of OR gate chip U7 the 5th are connect with the pins of door chip U6 the 6th；The first pins of OR gate chip U7,
4th pin, the 9th pin, the 12nd pin are all connected with protection signal input PRO_IN, the connection of the pins of OR gate chip U7 the 3rd
Output end PWM_OUT1, OR gate chip U7 the 6th pin connect output end PWM_OUT2, and the connection of the pins of OR gate chip U7 the 8th is defeated
Go out and hold PWM_OUT3, the pins of OR gate chip U7 the 11st connection output end PWM_OUT4.Wherein, phase inverter U1 model six is anti-
Phase device 74F04,74F08 chips are used with door chip U6, OR gate chip U7 uses 74F32 chips.
Entirely the operation principle of circuit is：
PRO_IN is input protection signal, and high level is effective；PWM_N is the adjustable pwm signal of dutycycle, and high level touches
Hair；AC_L be 220V ac input signals phase line, AC_N be 220V ac input signals zero line, PWM_OUT1, PWM_
OUT2, PWM_OUT3, PWM_OUT4 are to export the pwm signal for being used for driving AC chopping IGBT circuits by the modulation of this circuit,
It is effective when wherein PWM_OUT1, PWM_OUT2, PWM_OUT3, PWM_OUT4 output are low level, it can trigger IGBT drive circuit
Work.
When protection signal PRO_IN is high level, PWM_OUT1, PWM_OUT2, PWM_OUT3, PWM_OUT4 output are high,
IGBT drive circuit is turned off, when protection signal PRO_IN is low level, releases the protection to IGBT.
Pwm signal passes through phase inverter U1A, is changed into low level triggering, enters with the zero passage dead zone signals of U2, U3, U4, U5 output
Exported after row modulation to PWM_OUT1, PWM_OUT2, PWM_OUT3, PWM_OUT4 can trigger IGBT drive circuit.
In positive half cycle, optocoupler U3 and U5 can be opened AC_L, export high level, and wherein U3 provides afterflow letter for chopper circuit
Number, U3 is after U1C and protection signal provides positive half cycle afterflow triggering letter by U7D generation signal PWM_OUT3 for chopper circuit
Number, U5 and PWM_IN signals provide just half by U7B generation signal PWM_OUT2 with protection signal after U6B for chopper circuit
All copped wave trigger signals, because R1 and R2 resistance value is different, the time that U3 is opened is greater than U5, and U3 can turn on leading in U5
It is logical, it can be turned off after U5 is closed, it is ensured that freewheeling circuit first works before chopper circuit work, in freewheeling circuit not
Turned off after work, so ensure that and provide effective afterflow for chopper circuit.
In negative half period, optocoupler U2 and U4 can be opened AC_L, export high level, and wherein U2 provides afterflow letter for chopper circuit
Number, U2 is after U1B and protection signal provides negative half period afterflow triggering letter by U7C generation signal PWM_OUT4 for chopper circuit
Number, U4 and PWM_IN signals provide negative half by U7A generation signal PWM_OUT1 with protection signal after U6A for chopper circuit
All copped wave trigger signals, because R1 and R2 resistance value is different, the time that U2 is opened is greater than U4, and U2 can turn on leading in U4
It is logical, it can be turned off after U4 is closed, it is ensured that freewheeling circuit first works before chopper circuit work, in freewheeling circuit not
Turned off after work, so ensure that and provide effective afterflow for chopper circuit.
It should be pointed out that embodiment described above can make those skilled in the art that the present invention be more fully understood
Concrete structure, but do not limit the invention in any way create.Therefore, although specification and drawings and examples are to the present invention
Creation has been carried out being described in detail, it will be understood by those skilled in the art, however, that still can be repaiied to the invention
Change or equivalent substitution；And technical scheme and its improvement of all spirit and scope for not departing from the invention, it is covered
Among the protection domain of the invention patent.
Claims (7)
1. a kind of AC chopping PWM dead-zone generating circuits, it is characterised in that believe including 220V AC signals process circuit and PWM
Number process circuit, 220V AC signal process circuits input connect the phase line and zero line of 220V AC signals, pwm signal processing
The output end of the signal input part connection 220V AC signal process circuits of circuit, another is defeated for pwm signal process circuit
Enter end connection pwm signal PWM_IN, the 3rd signal input part connection input protection signal PRO_ of pwm signal process circuit
IN, the output end of pwm signal process circuit export four road drive signal PWM_OUT1, PWM_OUT2, PWM_OUT3, PWM_
OUT4。
2. a kind of AC chopping PWM dead-zone generating circuits according to claim 1, it is characterised in that described 220V is handed over
Flow signal processing circuit include optocoupler U2, optocoupler U3, optocoupler U4, optocoupler U5, the pins of optocoupler U2 first connect respectively electric capacity C1 one end,
AC_N signal ends, electric capacity C1 other ends difference connecting resistance R1 one end, electric capacity C2 one end, optocoupler U2 second pins, optocoupler U3 first
Pin, another termination AC_L signal ends of resistance R1, the electric capacity C2 other ends connect AC_N signal ends, optocoupler U3 second pins, light respectively
The pins of coupling U2 the 4th connect VCC voltages, the pins of optocoupler U2 the 3rd difference connecting resistance R3 one end, electric capacity C5 one end, pwm signal processing electricity
Road signal input part, the resistance R3 other ends, the electric capacity C5 other ends are grounded, and the pins of optocoupler U3 the 4th meet VCC voltages, optocoupler U3
Three pins difference connecting resistance R4 one end, electric capacity C6 one end, pwm signal process circuit signal input part, the resistance R4 other ends, electric capacity
The C6 other ends are grounded；
The pins of optocoupler U4 first connect electric capacity C3 one end, AC_N signal ends, electric capacity C3 other ends difference connecting resistance R2 one end, electricity respectively
Hold C4 one end, optocoupler U4 second pins, the pins of optocoupler U5 first, another termination AC_L signal ends of resistance R2, the electric capacity C4 other ends
AC_N signal ends, optocoupler U5 second pins are connect respectively, and the pins of optocoupler U4 the 4th connect VCC voltages, and the pins of optocoupler U4 the 3rd connect respectively
Resistance R5 one end, electric capacity C7 one end, pwm signal process circuit signal input part, the resistance R5 other ends, the electric capacity C7 other ends connect
Ground, the pins of optocoupler U5 the 4th connect VCC voltages, the pins of optocoupler U5 the 3rd difference connecting resistance R6 one end, electric capacity C8 one end, pwm signal
Process circuit signal input part, the resistance R6 other ends, the electric capacity C8 other ends are grounded.
3. a kind of AC chopping PWM dead-zone generating circuits according to claim 2, it is characterised in that optocoupler U2, optocoupler
U3, optocoupler U4, optocoupler U5 are PS2501 photoelectrical couplers.
A kind of 4. AC chopping PWM dead-zone generating circuits according to claim 2, it is characterised in that described pwm signal
Process circuit includes phase inverter U1, meets signal end PWM_IN with door chip U6, OR gate chip U7, phase inverter U1 first pin, instead
Phase device U1 second pins connect with the first pins of door chip U6, connect with the pins of door chip U6 the 4th, the pins of phase inverter U1 the 3rd respectively
The pins of optocoupler U2 the 3rd, the pins of phase inverter U1 the 4th connect the pins of OR gate chip U7 the tenth, and the pins of phase inverter U1 the 5th meet optocoupler U3
3rd pin, the pins of phase inverter U1 the 6th connect the pins of OR gate chip U7 the 13rd；
The pins of optocoupler U4 the 3rd are connect with door chip U6 second pins, the pins of optocoupler U5 the 3rd are connect with the pins of door chip U6 the 5th, with
The pins of door chip U6 the 3rd connect OR gate chip U7 second pins, and the pins of OR gate chip U7 the 5th are connect with the pins of door chip U6 the 6th；
The first pins of OR gate chip U7, the 4th pin, the 9th pin, the 12nd pin are all connected with protection signal input PRO_
IN, OR gate chip U7 the 3rd pin connect output end PWM_OUT1, the pins of OR gate chip U7 the 6th connection output end PWM_OUT2,
The pins of OR gate chip U7 the 8th connect output end PWM_OUT3, the pins of OR gate chip U7 the 11st connection output end PWM_OUT4.
A kind of 5. AC chopping PWM dead-zone generating circuits according to claim 4, it is characterised in that phase inverter U1 type
Number it is hex inverter 74F04.
6. a kind of AC chopping PWM dead-zone generating circuits according to claim 4, it is characterised in that adopted with door chip U6
With 74F08 chips.
7. a kind of AC chopping PWM dead-zone generating circuits according to claim 4, it is characterised in that OR gate chip U7 is adopted
With 74F32 chips.
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|---|---|---|---|
| CN201611178960.2A CN107342692B (en) | 2016-12-19 | 2016-12-19 | Alternating current chopping PWM dead zone generating circuit |
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|---|---|---|---|
| CN201611178960.2A CN107342692B (en) | 2016-12-19 | 2016-12-19 | Alternating current chopping PWM dead zone generating circuit |
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| CN107342692B CN107342692B (en) | 2023-05-02 |
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| Publication number | Publication date |
|---|---|
| CN107342692B (en) | 2023-05-02 |
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