CN206041784U - Trigger pulse modulation circuit of thyristor - Google Patents
Trigger pulse modulation circuit of thyristor Download PDFInfo
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- CN206041784U CN206041784U CN201621060721.2U CN201621060721U CN206041784U CN 206041784 U CN206041784 U CN 206041784U CN 201621060721 U CN201621060721 U CN 201621060721U CN 206041784 U CN206041784 U CN 206041784U
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Abstract
The utility model provides a trigger pulse modulation circuit of thyristor, includes: impulse waveform produces the circuit, modulating signal produces circuit and AND circuit, and the AND circuit produces the circuit with impulse waveform respectively and modulating signal produces circuit connection. Above -mentioned trigger pulse modulation circuit of thyristor, impulse waveform produces the circuit and produces the pulse width modulation wave form, modulating signal produces the circuit and produces duration of pulse modulating signal, the AND circuit carries out the logic AND operation in order to generate drive signal with pulse width modulation wave form and pulse width modulation signal, and to thyristor outlet driving signal, thereby trigger the thyristor, the drive signal that can know logic AND operation back formation is strong pulse trigger, it fully switches on to enable the thyristor, improve trigger circuit's reliability, can greatly reduce the gate pole loss of driver chip's thyristor when guaranteeing accurate triggering the angle and trigger the energy to be pulse operating time, the qualities of the pulse modulation circuit are improved, the simple reliable and easily realization of this circuit.
Description
Technical field
This utility model is related to triggers circuit technical field, more particularly to a kind of impulse modulation electricity of triggering IGCT
Road.
Background technology
High voltage that IGCT can be born due to which, high current and it is reliable and stable the characteristics of and be widely used in electric power electricity
The fields such as son, motor control, high-power frequency conversion.In conventional application, typically by microcontroller such as DSP (at digital signal
Reason device, Digital Signal Processing), MCU (micro-control unit, Microcontroller Unit), FPGA it is (existing
Field programmable gate array, Field-Programmable Gate Array) etc. generation PWM (pulse width modulation, Pulse
Width Modulation) ripple directly drives IGCT after one-level power amplification, so that turn on thyristors.
However, above-mentioned type of drive has higher requirement to the performance of itself with thyristor driver chip, due to driving
The full duty triggering within a triggering cycle of dynamic chip, when flowing through big driving chip electric current, long-play there is heating in circuit
The problem even damaged, and then produce motor out of control, bridge circuit Shang Qiao and lower bridge and many adverse consequencess such as simultaneously turn on, no
The driving demand of circuit can be met.
Utility model content
Based on this, it is necessary to for how to improve the technical problem of circuit quality, there is provided a kind of pulse of triggering IGCT
Modulation circuit.
A kind of pulse modulated circuit of triggering IGCT, including：Impulse waveform produce circuit, modulated signal producing circuit with
And and gate circuit, it is described to produce circuit and modulated signal producing circuit company respectively with the impulse waveform with gate circuit
Connect；The impulse waveform produces circuit to be used for producing pulse width modulated waveform, and exports the pulse to described with gate circuit
Wide modulation waveform；The modulated signal producing circuit is used for producing pulse width modulating signal, and to described defeated with gate circuit
Go out the pulse width modulating signal；It is described with gate circuit for the pulse width modulated waveform and the pulse width are adjusted
Signal processed carries out logic and operation to generate drive signal, and described to trigger for the drive signal is exported to IGCT
IGCT.
Wherein in one embodiment, the modulated signal producing circuit includes：First self-oscillation circuit, the first frequency-selecting
Circuit and the first filtering shaping circuit, the first self-oscillation circuit are connected and institute with first frequency selection circuit respectively
The connection of the first filtering shaping circuit is stated, first frequency selection circuit is connected with first filtering shaping circuit, first filter
Wave shaping circuit is connected with gate circuit with described；
The first self-oscillation circuit is used for respectively to first frequency selection circuit and first filter shape electricity
Road exports the first modulated pulse signal, and first frequency selection circuit is used for adjusting the dutycycle of first modulated pulse signal,
The second modulated pulse signal is generated and exports, first filtering shaping circuit is for the first self-oscillation circuit output
First modulated pulse signal and first frequency selection circuit output second modulated pulse signal carry out shaping
Process to generate the pulse width modulating signal, and the pulse width modulating signal is exported to described and gate circuit.
Wherein in one embodiment, the first self-oscillation circuit includes resistance R11, electric capacity C11, phase inverter
U11B, first frequency selection circuit include electric capacity C12, resistance R12, first filtering shaping circuit include phase inverter U12B,
Phase inverter U13B and door U14A；One end ground connection of electric capacity C11, the other end are connected with the input of phase inverter U11B；Resistance R11
It is connected with the input and outfan of phase inverter U11B respectively；One end of electric capacity C12 is connected with the outfan of phase inverter U11B, separately
One end is connected with the input of phase inverter U12B；One end of resistance R12 is connected with the input of phase inverter U12B, another termination
Ground；The input of phase inverter U13B is connected with the outfan of phase inverter U12B, the outfan of phase inverter U13B with door U14A's
Input connects；The outfan of phase inverter U11B also be connected with the input of door U14A；With the outfan of door U14A with it is described
It is connected with the input of gate circuit.
Wherein in one embodiment, phase inverter U12B and phase inverter U13B is schmitt inverter.
Wherein in one embodiment, the modulated signal producing circuit includes：Second self-oscillation circuit, the second frequency-selecting
Circuit and the second filtering shaping circuit, the second self-oscillation circuit are connected with second frequency selection circuit, and described second
Frequency selection circuit is connected with second filtering shaping circuit, and second filtering shaping circuit is connected with gate circuit with described；
The second self-oscillation circuit exports the second modulated pulse signal, second choosing to second frequency selection circuit
Frequency circuit is used for adjusting the dutycycle of second modulated pulse signal, generates and export the second modulated pulse signal, and described the
Two filtering shaping circuits for Shape correction is carried out to second modulated pulse signal that second frequency selection circuit is exported with
The pulse width modulating signal is generated, and the pulse width modulating signal is exported to described with gate circuit.
Wherein in one embodiment, the second self-oscillation circuit includes resistance R21, electric capacity C21, phase inverter
U21B, second frequency selection circuit include electric capacity C22, resistance R22, second filtering shaping circuit include phase inverter U22B,
Phase inverter U23B；One end ground connection of electric capacity C21, the other end are connected with the input of phase inverter U21B；Resistance R21 respectively with it is anti-phase
The input of device U21B and outfan connection；One end of electric capacity C22 is connected with the outfan of phase inverter U21B, the other end with it is anti-phase
The input connection of device U22B；One end of resistance R22 is connected with the input of phase inverter U22B, other end ground connection；Phase inverter
The input of U23B is connected with the outfan of phase inverter U22B, the outfan of phase inverter U23B and described with gate circuit input
Connection.
Wherein in one embodiment, phase inverter U22B and phase inverter U23B is schmitt inverter.
Wherein in one embodiment, the impulse waveform produces circuit includes digital signal processor, micro-control unit
Or field programmable gate array.
The pulse modulated circuit of above-mentioned triggering IGCT, impulse waveform produce circuit and produce pulse width modulated waveform, adjust
Signal generating circuit processed produces pulse width modulating signal, believes pulse width modulated waveform and pulse width modulation with gate circuit
Number logic and operation is carried out to generate drive signal, and to SCR-output drive signal, so as to trigger IGCT, it is known that logic
Trigger for high power pulse with the drive signal generated after computing, IGCT can be made sufficiently conductive, improve the reliability of triggers circuit,
Ensure accurate Trigger Angle and trigger energy i.e. pulse operating time while can greatly reduce the IGCT of driving chip
Gate pole is lost, and improves the quality of pulse modulated circuit, and the circuit is simple and reliable and is easily achieved.
Description of the drawings
Fig. 1 is the module diagram of the pulse modulated circuit of triggering IGCT in one embodiment；
Fig. 1-2 is the module diagram of the pulse modulated circuit of triggering IGCT in another embodiment；
Fig. 2 is the module diagram of modulated signal producing circuit in one embodiment；
Fig. 3 is the principle schematic of modulated signal producing circuit in one embodiment；
Fig. 4 is the module diagram of modulated signal producing circuit in another embodiment；
Fig. 5 is the principle schematic of modulated signal producing circuit in another embodiment；
The step of Fig. 6 is the method for triggering IGCT in one embodiment schematic diagram.
Specific embodiment
It is understandable for enabling above-mentioned purpose of the present utility model, feature and advantage to become apparent from, below in conjunction with the accompanying drawings to this
The specific embodiment of utility model is described in detail.Elaborate many details in order to abundant in the following description
Understand this utility model.But this utility model can be implemented with being much different from alternate manner described here, this area
Technical staff can do similar improvement in the case of without prejudice to this utility model intension, therefore this utility model does not receive following public affairs
The restriction of the specific embodiment opened.
Fig. 1 is referred to, which is the module diagram of the pulse modulated circuit 10 of triggering IGCT in one embodiment, a kind of
The pulse modulated circuit 10 of triggering IGCT includes：Impulse waveform produce circuit 101, modulated signal producing circuit 102 and with
Gate circuit 103, produces circuit 101 with impulse waveform respectively with gate circuit 103 and modulated signal producing circuit 102 is connected.
Impulse waveform produces circuit 101 to be used for producing pulse width modulated waveform, and exports pulse width to gate circuit 103
Degree modulation waveform.For example, pulse width modulated waveform is PWM ripples.
Modulated signal producing circuit 102 is used for producing pulse width modulating signal, and exports pulse width to gate circuit 103
Degree modulated signal.For example, pulse width modulating signal is PWM modulation signal.
With gate circuit 103 for pulse width modulated waveform and pulse width modulating signal are carried out logic and operation with life
Into drive signal, and to 104 output drive signal of IGCT triggering IGCT 104.
The pulse modulated circuit 10 of above-mentioned triggering IGCT, impulse waveform produce circuit 101 and produce pulse width modulation wave
Shape, modulated signal producing circuit 102 produce pulse width modulating signal, with gate circuit 103 by pulse width modulated waveform and arteries and veins
Rushing bandwidth modulation signals carries out logic and operation to generate drive signal, and to SCR-output drive signal, so as to trigger crystalline substance
Brake tube, it is known that the drive signal generated after logic and operation is triggered for high power pulse, and IGCT can be made sufficiently conductive, improves triggering electricity
The reliability on road, can greatly reduce driving core in the accurate Trigger Angle of guarantee and trigger energy while being pulse operating time
The gate pole loss of the IGCT of piece, improves the quality of pulse modulated circuit, and the circuit is simple and reliable and is easily achieved.
For produce and output pulse width modulation waveform, for example, impulse waveform produce circuit include digital signal processor,
Micro-control unit or field programmable gate array.Understand, digital signal processor, micro-control unit and field programmable gate
Array can produce PWM ripples.For example, impulse waveform produces circuit includes digital signal processor DSP, to produce PWM by DSP
Ripple；And for example, impulse waveform produces circuit includes micro-control unit MCU, to produce PWM ripples by MCU；And for example, impulse waveform is produced
Raw circuit includes on-site programmable gate array FPGA, to produce PWM ripples by FPGA.
For improving the on-state rate of IGCT, in an embodiment, the pulse width modulation letter that modulated signal producing circuit is produced
Number have predetermined width so that IGCT can be reached within the action time of the pulse holds up column current, make IGCT abundant
Conducting.It is pointed out that the predetermined width of pulse width modulating signal can be determined according to the practical situation of circuit.
Further, the pulse modulated circuit for triggering IGCT also includes power amplification circuit.Power amplification circuit with
The outfan connection of gate circuit, for carrying out power amplification by the drive signal exported with gate circuit.In the present embodiment, power
Amplifying circuit can adopt existing circuit module, it is also possible to existing circuit module be repaiied according to being actually needed for circuit
Change.So understand that drive signal enters its power increase after overpower amplifying circuit, carrying load ability is higher, further increasing
The on-state rate of IGCT.
Fig. 1-2 is referred to, which is the module diagram of the pulse modulated circuit of triggering IGCT in another embodiment, this
In embodiment, as a example by impulse waveform generation circuit 101 includes digital signal processor DSP, i.e. DSP sends three road PWM waveforms, i.e.,
PWM1 waveforms, PWM2 waveforms and PWM3 waveforms.Modulated signal producing circuit 102 includes modulated signal producing circuit 1, modulation letter
Number produce circuit 2 and modulated signal producing circuit 3.With gate circuit 103 include with gate circuit 1, and gate circuit 2 and with door electricity
Road 3.Drive circuit 105 includes IGCT 1, IGCT 2 and IGCT 3.It should be noted that drive circuit 105 is this reality
Apply the pulse modulated circuit of the triggering IGCT of example circuit module to be driven.
In the present embodiment, the pulse width modulation letter that the waveform PWM1 and modulated signal producing circuit 1 that DSP sends is produced
Number together input and gate circuit 1, export to drive circuit 105 after with the logic and operation of gate circuit 1, to trigger IGCT 1.
In the same manner, the pulse width modulating signal that the waveform PWM2 and modulated signal producing circuit 2 that DSP sends is produced together is input into and door
Circuit 2, exports to drive circuit 105 after with the logic and operation of gate circuit 2, to trigger IGCT 2.In the same manner, DSP sends
The pulse width modulating signal that waveform PWM3 and modulated signal producing circuit 3 are produced together is input into and gate circuit 3, electric with door
Export after the logic and operation on road 3 to drive circuit 305, to trigger IGCT 3.In the present embodiment, DSP is simultaneously emitted by PWM1 ripples
Shape, PWM2 waveforms and PWM3 waveforms, to trigger IGCT 1, IGCT 2 and IGCT 3 simultaneously, it is ensured that accurate Trigger Angle
With trigger energy driving the drive circuit 105.
Fig. 2 is referred to, which is the module diagram of modulated signal producing circuit 102 in one embodiment, for example, modulation letter
Number produce circuit 102 include：First self-oscillation circuit 201, the first frequency selection circuit 202 and the first filtering shaping circuit 203,
First self-oscillation circuit 201 is connected with the first frequency selection circuit 202 respectively and the first filtering shaping circuit 203 connects, and first
Frequency selection circuit 202 is connected with the first filtering shaping circuit 203, and the first filtering shaping circuit 203 be connected with gate circuit 103 with being somebody's turn to do.
First self-oscillation circuit 201 is used for defeated to the first frequency selection circuit 202 and the first filtering shaping circuit 203 respectively
Go out the first modulated pulse signal, the first frequency selection circuit 202 is used for adjusting the dutycycle of the first modulated pulse signal, generates and export
Second modulated pulse signal, the first filtering shaping circuit 203 for the first self-oscillation circuit 201 is exported first modulation arteries and veins
The second modulated pulse signal for rushing signal and the output of the first frequency selection circuit 202 carries out Shape correction to generate pulse width modulation
Signal, and to 103 output pulse width modulated signal of gate circuit.
Fig. 3 is referred to, which is the principle schematic of modulated signal producing circuit in one embodiment, for example, the first self-excitation
Oscillating circuit includes resistance R11, electric capacity C11, phase inverter U11B.For example, the first frequency selection circuit 202 includes electric capacity C12, resistance
R12.For example, the first filtering shaping circuit 203 includes phase inverter U12B, phase inverter U13B and door U14A.In the present embodiment, electricity
The resistance of resistance R11 and resistance R12 is 10nF, phase inverter U11B, phase inverter for the capacitance of 10K, electric capacity C11 and electric capacity C12
U12B and phase inverter U13B adopts six tunnel schmidt trigger reverser 74LS14N, with door U14A using model 7408J and door
Circuit.It is appreciated that phase inverter U11B, phase inverter U12B and phase inverter U13B are schmitt inverter, can be with intensifier circuit
Capacity of resisting disturbance, it is to avoid false triggering.
For example, one end ground connection of electric capacity C11, the other end are connected with the input of phase inverter U11B.Resistance R11 respectively with instead
The input of phase device U11B and outfan connection.One end of electric capacity C12 is connected with the outfan of phase inverter U11B, the other end with it is anti-
The input connection of phase device U12B.One end of resistance R12 is connected with the input of phase inverter U12B, other end ground connection.Phase inverter
The input of U13B is connected with the outfan of phase inverter U12B, and the outfan of phase inverter U13B is connected with the input with door U14A
Connect.The outfan of phase inverter U11B be connected with the input of door U14A with being somebody's turn to do.With the outfan and this and gate circuit 103 of door U14A
Input connection.
It is appreciated that the first self-oscillation circuit 201 being made up of resistance R11, electric capacity C11, phase inverter U11B, by electric capacity
First frequency selection circuit 202 of C12, resistance R12 composition and be made up of phase inverter U12B, phase inverter U13B and door U14A the
One filtering shaping circuit 203, circuit is simple and reliable, it is easy to accomplish.First filtering shaping circuit is to the electric current exported with gate circuit
That is rear class driving current can at most be reduced to original 10%, and the modulation pulse and trigger for high power pulse, than common PWM level
Triggering can make IGCT sufficiently conductive, improve the reliability of triggers circuit.It should be noted that high power pulse refers to each modulation
Current amplitude in pulse period can reach very high, be the several times of normal drive current, quickly effectively to drive IGCT.Afterwards
The characteristic of the specific effect components and parts related to IGCT etc. of the reduction degree of level driving current is relevant, also can under normal circumstances
It is reduced to original 1/3rd.
As shown in figure 3, in the present embodiment, in self-oscillation circuit, U11B is phase inverter, and R11 and C11 are respectively charge and discharge
Resistance and electric capacity, the voltage at initial time C11 two ends is 0, and phase inverter U11B exports high level and gives electric capacity C11 by R11
Charge, the voltage at electric capacity C11 two ends is slowly raised, after the high level voltage of phase inverter U11B is more than, phase inverter U11B outputs
0, electric capacity C11 start electric discharge over the ground by R11, and the voltage at electric capacity C11 two ends is slowly reduced, when the low electricity less than phase inverter U11B
When ordinary telegram is pressed, phase inverter U11B outputs 1 are so circulated, just export a series of modulated pulse signals.The frequency of modulated signal depends on
In the size of R, C.In specific application, precision and the driving chip of the Trigger Angle of actual thyristor gating circuit is considered as
Power consumption.Frequency is higher, and triggering angular accuracy is higher, and the loss of driving chip gate pole is bigger.Accordingly, it would be desirable to according to Practical Project need
Will, the seeking balance point between Trigger Angle and power consumption.Guarantee the sufficiently conductive gate pole loss that will also reduce triggers circuit of IGCT,
And then improve the performance of thyristor gating circuit.
In frequency-selective network, the capacitance of electric capacity C12 determines the dutycycle of the signal of final output, and capacitance is bigger,
Dutycycle is bigger, needs to be considered according to driving power consumption and turn on thyristors angle triggering requirement during design.
In the filtering shaping circuit being made up of U12B, U13B, U14A, U12B, U13B are schmitt inverter, by two
Level is anti-phase can to carry out shaping to the pwm signal of frequency-selective network output, obtain ideal PWM waveform.By inciting somebody to action with door U14A
Output after phase inverter is exported and the reliability that can improve this circuit output with self-maintained circuit.
Fig. 4 is referred to, which is the module diagram of modulated signal producing circuit in another embodiment, for example, modulation letter
Number produce circuit include：Second self-oscillation circuit 401, the second frequency selection circuit 402 and the second filtering shaping circuit 403.Example
Such as, the second self-oscillation circuit 401 is connected with the second frequency selection circuit 402, the second frequency selection circuit 402 and the second filtering shaping circuit
403 connections, the second filtering shaping circuit 403 were connected with gate circuit 103 with being somebody's turn to do.
For example, the second self-oscillation circuit 401 is for the second modulated pulse signal of output of the second frequency selection circuit 402.The
Two frequency selection circuits 402 are used for adjusting the dutycycle of the second modulated pulse signal, generate and export the second modulated pulse signal.Second
Filtering shaping circuit 403 is for carrying out Shape correction to generate to the second modulated pulse signal that the second frequency selection circuit 402 is exported
Pulse width modulating signal, and to 103 output pulse width modulated signal of gate circuit.
Fig. 5 is referred to, which is the principle schematic of modulated signal producing circuit in another embodiment, for example, second certainly
Sharp oscillating circuit 401 includes resistance R21, electric capacity C21, phase inverter U21B, and the second frequency selection circuit 402 includes electric capacity C22, resistance
R22, the second filtering shaping circuit 403 include phase inverter U22B, phase inverter U23B.In the present embodiment, resistance R21 and resistance R22
Resistance be 10nF, phase inverter U21B, phase inverter U22B and phase inverter for the capacitance of 10K, electric capacity C21 and electric capacity C22
U23B adopts six tunnel schmidt trigger reverser 74LS14N.It is appreciated that phase inverter U21B, phase inverter U22B and phase inverter
U23B is schmitt inverter, can be with the capacity of resisting disturbance of intensifier circuit, it is to avoid false triggering.
For example, one end ground connection of electric capacity C21, the other end are connected with the input of phase inverter U21B.Resistance R21 respectively with instead
The input of phase device U21B and outfan connection.One end of electric capacity C22 is connected with the outfan of phase inverter U21B, the other end with it is anti-
The input connection of phase device U22B.One end of resistance R22 is connected with the input of phase inverter U22B, other end ground connection.Phase inverter
The input of U23B is connected with the outfan of phase inverter U22B, the outfan of phase inverter U23B with should input with gate circuit 103
End connection.
It is appreciated that the second self-oscillation circuit 401 being made up of resistance R21, electric capacity C21, phase inverter U21B, by electric capacity
Second frequency selection circuit 402 of C22, resistance R22 composition and be made up of phase inverter U22B, phase inverter U23B and door U24A the
Two filtering shaping circuits 403, circuit is simple and reliable, it is easy to accomplish.Second filtering shaping circuit is to the electric current exported with gate circuit
That is rear class driving current can at most be reduced to original 10%, and the modulation pulse and trigger for high power pulse, than common PWM level
Triggering can make IGCT sufficiently conductive, improve the reliability of triggers circuit.It should be noted that high power pulse refers to each modulation
Current amplitude in pulse period can reach very high, be the several times of normal drive current, quickly effectively to drive IGCT.Afterwards
The characteristic of the specific effect components and parts related to IGCT etc. of the reduction degree of level driving current is relevant, also can under normal circumstances
It is reduced to original 1/3rd.
As shown in figure 5, in the present embodiment, in self-oscillation circuit, U21B is phase inverter, and R21 and C21 are respectively charge and discharge
Resistance and electric capacity.The voltage at initial time C21 two ends is 0, and phase inverter U21B exports high level and gives electric capacity C21 by R21
Charge, the voltage at electric capacity C21 two ends is slowly raised, after the high level voltage of phase inverter U21B is more than, phase inverter output 0, electricity
Hold C21 and electric discharge is started over the ground by R21, the voltage at its two ends is slowly reduced, when the low level voltage less than phase inverter U21B,
Phase inverter output 1, so circulates, just exports a series of modulated pulse signals.Size of the frequency of modulated signal depending on R, C.
In specific application, the precision of the Trigger Angle of actual thyristor gating circuit and the power consumption of driving chip is considered as.Frequency
Higher, triggering angular accuracy is higher, and the loss of driving chip gate pole is bigger.Accordingly, it would be desirable to according to actual requirement of engineering, in Trigger Angle and
Seeking balance point between power consumption.Guarantee the sufficiently conductive gate pole loss that will also reduce triggers circuit of IGCT, and then improve brilliant lock
The performance of pipe triggers circuit.
In frequency-selective network, the capacitance of C5 determines the dutycycle of the signal of final output, and capacitance is bigger, dutycycle
It is bigger, need to be considered according to driving power consumption and turn on thyristors angle triggering requirement during design.
In the filtering shaping circuit being made up of U22B, U23B, U12B, U13B are schmitt inverter, anti-by two-stage
Shaping can be carried out to the pwm signal of frequency-selective network output mutually, obtain ideal PWM waveform.Two will be constituted by U22B, U23B
Output of the output of level negative circuit directly as circuit, to drive thyristor gating circuit.
Fig. 6 is referred to, which is the step of triggering method 20 of IGCT in one embodiment schematic diagram, the triggering IGCT
Method be applied to the various embodiments described above triggering IGCT pulse modulated circuit.For example, a kind of method of triggering IGCT
20 include：
Step S601：Set up impulse waveform and produce circuit and modulated signal producing circuit.
Specifically, impulse waveform generation circuit and modulated signal producing circuit are the circuit as shown in Fig. 3 or Fig. 5.Pulse
Waveform generating circuit includes digital signal processor, micro-control unit or field programmable gate array.Modulated signal produces electricity
The pulse width modulating signal that road produces has predetermined width, so that IGCT can be reached within the action time of the pulse
Column current is held up, makes IGCT sufficiently conductive.
Step S602：Circuit evolving pulse width modulated waveform is produced by impulse waveform, and, produced by modulated signal
Raw circuit evolving pulse width modulating signal.
Specifically, impulse waveform produces circuit and is used for producing pulse width modulated waveform, and exports pulse to gate circuit
Wide modulation waveform.For example, pulse width modulated waveform is PWM ripples.Modulated signal producing circuit is used for producing pulse width tune
Signal processed, and to gate circuit output pulse width modulated signal.For example, pulse width modulating signal is PWM modulation signal.
Step S603：Pulse width modulated waveform and pulse width modulating signal are carried out into logic and operation, generation is obtained
Drive signal.
Specifically, set up and gate circuit.For example, with gate circuit it is circuit as shown in Fig. 3 or Fig. 5.It is used for gate circuit
Pulse width modulated waveform and pulse width modulating signal are carried out into logic and operation to generate drive signal and defeated to IGCT
Go out drive signal to trigger IGCT.
Step S604：Output drive signal is to IGCT triggering IGCT.
Specifically, impulse waveform produces circuit and simultaneously produces three tunnel pulse width modulated waveforms, and to exporting with gate circuit
The three tunnels pulse width modulated waveform.For example, pulse width modulated waveform is PWM ripples.For example, three modulated signals are set up to produce
Circuit, per producing pulse width modulating signal all the way, and respectively to gate circuit output pulse width modulated signal.
The method 20 of above-mentioned triggering IGCT, impulse waveform produce circuit and produce pulse width modulated waveform, modulated signal
Produce circuit and produce pulse width modulating signal, pulse width modulated waveform and pulse width modulating signal are carried out with gate circuit
Logic and operation to generate drive signal, and to SCR-output drive signal, so as to trigger IGCT, it is known that logic and operation
The drive signal for generating afterwards is triggered for high power pulse, and IGCT can be made sufficiently conductive, improves the reliability of triggers circuit, is ensureing essence
True Trigger Angle and trigger energy can greatly reduce the gate pole of the IGCT of driving chip and damage while being pulse operating time
Consumption, improves the quality of pulse modulated circuit, and the circuit is simple and reliable and is easily achieved.
In one embodiment, include the step of output drive signal to IGCT is to trigger IGCT：Amplify drive signal
Power；To the drive signal after SCR-output power amplification with triggering and conducting IGCT.
Specifically：The pulse modulated circuit of triggering IGCT also includes power amplification circuit.Power amplification circuit with should be with
The outfan connection of gate circuit, to amplify the power with the drive signal of gate circuit output.Understand that drive signal enters overpower and puts
After big circuit, its power increases, and carrying load ability is higher, further increasing the on-state rate of IGCT.Thus, in IGCT
In triggers circuit, the PWM ripples that microcontroller is sent are with PWM modulation signal phase with being then re-fed into driving chip carries out power
Amplify and drive turn on thyristors.The pulse that modulated signal producing circuit is produced has certain width so that IGCT is at this
Can reach in pulse operating time and hold up column current, make IGCT sufficiently conductive.
The present embodiment has the beneficial effect that：
(1) driving power consumption, i.e. the method are reduced and is ensureing that accurate Trigger Angle and trigger energy are pulse operating time
The gate pole loss of driving chip can be greatly reduced simultaneously.
(2) circuit is simply effectively easily achieved, and rear class driving current can be at most reduced to original 10%, needs to refer to
Go out, the characteristic of the specific effect of the reduction components and parts related to IGCT etc. of rear class driving current is relevant, under normal circumstances
Original 1/3rd can be also reduced to.Modulation pulse is triggered using high power pulse, fills can IGCT than common PWM level triggers
Divide conducting, improve the reliability of triggers circuit.
Each technical characteristic of embodiment described above arbitrarily can be combined, for making description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more concrete and detailed,
But therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, some deformations and improvement can also be made, these belong to
Protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be defined by claims.
Claims (8)
1. one kind triggers the pulse modulated circuit of IGCT (104), it is characterised in that include：Impulse waveform produces circuit
(101), modulated signal producing circuit (102) and with gate circuit (103), it is described with gate circuit (103) respectively with the pulse
Waveform generating circuit (101) and the modulated signal producing circuit (102) connection；
The impulse waveform produces circuit (101) is used for producing pulse width modulated waveform, and to described defeated with gate circuit (103)
Go out the pulse width modulated waveform；
Described modulated signal producing circuit (102) are used for producing pulse width modulating signal, and to described defeated with gate circuit (103)
Go out the pulse width modulating signal；
It is described with gate circuit (103) for the pulse width modulated waveform and the pulse width modulating signal are carried out logic
With computing to generate drive signal, and for exporting IGCT (104) to trigger the IGCT drive signal
(104)。
2. the pulse modulated circuit of triggering IGCT (104) according to claim 1, it is characterised in that modulation letter
Number produce circuit (102) include：First self-oscillation circuit (201), the first frequency selection circuit (202) and the first filter shape electricity
Road (203), the first self-oscillation circuit (201) are connected with the first frequency selection circuit (202) and described first respectively
Filtering shaping circuit (203) connects, and the first frequency selection circuit (202) are connected with the first filtering shaping circuit (203), institute
State the first filtering shaping circuit (203) to be connected with gate circuit (103) with described；
Described first self-oscillation circuit (201) are used for respectively to the first frequency selection circuit (202) and first filtering
Shaping circuit (203) exports the first modulated pulse signal, and described first frequency selection circuit (202) are used for adjusting the first modulation arteries and veins
The dutycycle of signal is rushed, the second modulated pulse signal is generated and export, the first filtering shaping circuit (203) are for described
First modulated pulse signal and first frequency selection circuit (202) output that first self-oscillation circuit (201) is exported
Second modulated pulse signal carry out Shape correction to generate the pulse width modulating signal, and export the pulse width
Degree modulated signal is to described and gate circuit (103).
3. it is according to claim 2 triggering IGCT (104) pulse modulated circuit, it is characterised in that described first from
Sharp oscillating circuit (201) include resistance R11, electric capacity C11, phase inverter U11B, and described first frequency selection circuit (202) include electric capacity
C12, resistance R12, described first filtering shaping circuit (203) include phase inverter U12B, phase inverter U13B and door U14A；
One end ground connection of electric capacity C11, the other end are connected with the input of phase inverter U11B；
Resistance R11 is connected with the input and outfan of phase inverter U11B respectively；
One end of electric capacity C12 is connected with the outfan of phase inverter U11B, and the other end is connected with the input of phase inverter U12B；
One end of resistance R12 is connected with the input of phase inverter U12B, other end ground connection；
The input of phase inverter U13B is connected with the outfan of phase inverter U12B, the outfan of phase inverter U13B with door U14A's
Input connects；
The outfan of phase inverter U11B also be connected with the input of door U14A；
It is connected with the outfan of door U14A with the input with gate circuit (103).
4. it is according to claim 3 triggering IGCT (104) pulse modulated circuit, it is characterised in that phase inverter U12B
It is schmitt inverter with phase inverter U13B.
5. the pulse modulated circuit of triggering IGCT (104) according to claim 1, it is characterised in that modulation letter
Number produce circuit (102) include：Second self-oscillation circuit (401), the second frequency selection circuit (402) and the second filter shape electricity
Road (403), the second self-oscillation circuit (401) are connected with the second frequency selection circuit (402), second frequency selection circuit
(402) it is connected with the second filtering shaping circuit (403), the second filtering shaping circuit (403) and described and gate circuit
(103) connect；
Second self-oscillation circuit (401) to described second frequency selection circuit (402) export the second modulated pulse signal, described
Second frequency selection circuit (402) is used for adjusting the dutycycle of second modulated pulse signal, generates and export the second modulation pulse
Signal, the second filtering shaping circuit (403) for the second frequency selection circuit (402) are exported it is described second modulation arteries and veins
Rushing signal carries out Shape correction to generate the pulse width modulating signal, and exports the arteries and veins to described with gate circuit (103)
Rush bandwidth modulation signals.
6. it is according to claim 5 triggering IGCT (104) pulse modulated circuit, it is characterised in that described second from
Sharp oscillating circuit (401) include resistance R21, electric capacity C21, phase inverter U21B, and described second frequency selection circuit (402) include electric capacity
C22, resistance R22, described second filtering shaping circuit (403) include phase inverter U22B, phase inverter U23B；
One end ground connection of electric capacity C21, the other end are connected with the input of phase inverter U21B；
Resistance R21 is connected with the input and outfan of phase inverter U21B respectively；
One end of electric capacity C22 is connected with the outfan of phase inverter U21B, and the other end is connected with the input of phase inverter U22B；
One end of resistance R22 is connected with the input of phase inverter U22B, other end ground connection；
The input of phase inverter U23B is connected with the outfan of phase inverter U22B, and the outfan of phase inverter U23B is electric with door with described
The input connection on road (103).
7. it is according to claim 6 triggering IGCT (104) pulse modulated circuit, it is characterised in that phase inverter U22B
It is schmitt inverter with phase inverter U23B.
8. it is according to any one of claim 1 to 7 triggering IGCT (104) pulse modulated circuit, it is characterised in that
The impulse waveform produces circuit (101) includes digital signal processor, micro-control unit or field programmable gate array.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621060721.2U CN206041784U (en) | 2016-09-18 | 2016-09-18 | Trigger pulse modulation circuit of thyristor |
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| CN201621060721.2U CN206041784U (en) | 2016-09-18 | 2016-09-18 | Trigger pulse modulation circuit of thyristor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329891A (en) * | 2016-09-18 | 2017-01-11 | 珠海格力节能环保制冷技术研究中心有限公司 | Pulse modulation circuit and method for triggering thyristor |
| CN107171171A (en) * | 2017-04-28 | 2017-09-15 | 大族激光科技产业集团股份有限公司 | The modulator approach and device of laser power signal |
| CN109861588A (en) * | 2019-04-04 | 2019-06-07 | 浙江正泰电器股份有限公司 | Soft activator trigger circuit |
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2016
- 2016-09-18 CN CN201621060721.2U patent/CN206041784U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329891A (en) * | 2016-09-18 | 2017-01-11 | 珠海格力节能环保制冷技术研究中心有限公司 | Pulse modulation circuit and method for triggering thyristor |
| CN106329891B (en) * | 2016-09-18 | 2019-08-30 | 珠海格力电器股份有限公司 | Pulse modulation circuit and method for triggering thyristor |
| CN110474520A (en) * | 2016-09-18 | 2019-11-19 | 珠海格力电器股份有限公司 | Trigger the pulse modulated circuit and method of thyristor |
| CN110474520B (en) * | 2016-09-18 | 2021-03-23 | 珠海格力电器股份有限公司 | Pulse modulation circuit and method for triggering thyristor |
| CN107171171A (en) * | 2017-04-28 | 2017-09-15 | 大族激光科技产业集团股份有限公司 | The modulator approach and device of laser power signal |
| CN109861588A (en) * | 2019-04-04 | 2019-06-07 | 浙江正泰电器股份有限公司 | Soft activator trigger circuit |
| CN109861588B (en) * | 2019-04-04 | 2024-05-14 | 浙江正泰电器股份有限公司 | Soft starter trigger circuit |
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