CN111431395B - Switch ringing suppression circuit based on gate driver and control method thereof - Google Patents
Switch ringing suppression circuit based on gate driver and control method thereof Download PDFInfo
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- CN111431395B CN111431395B CN202010172966.9A CN202010172966A CN111431395B CN 111431395 B CN111431395 B CN 111431395B CN 202010172966 A CN202010172966 A CN 202010172966A CN 111431395 B CN111431395 B CN 111431395B
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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
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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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
- H02M1/088—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
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
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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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
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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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- Physics & Mathematics (AREA)
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- Analogue/Digital Conversion (AREA)
- Electronic Switches (AREA)
Abstract
A switch ringing suppression circuit based on a gate driver and a control method thereof belong to the field of power electronic devices and control. The device comprises a driving circuit, an ADC sampling circuit and a main control unit, wherein the driving circuit comprises a programmable digital voltage source and a current spreading circuit, and the main control unit comprises a data detector, a driving waveform generator and a power switch controller. The output signal of the driving waveform generator in the main control unit is transmitted to the programmable digital voltage source, the output signal of the power switch controller is transmitted to the current spreading circuit, and the data detector receives and processes the data sent by the sampling circuit. The sampling circuit measures the current flowing through the switch tube of the measured power and is connected with the collector electrode/drain electrode of the switch tube. The ringing phenomenon of the power switch tube is restrained by adjusting the driving waveform, and for power switch tubes of different types or different load conditions, only the voltage value restrained by ringing is adjusted by a program; the invention suppresses ringing without changing the structure of the converter and improves the reliability of the converter.
Description
Technical Field
The invention relates to a switch ringing suppression circuit based on a gate driver and a control method thereof, belonging to the field of power electronic devices and control.
Background
The dominant among the power electronic converters is the voltage type converter, which is characterized by constant polarity of the voltage at the direct current side and bidirectional conduction of the current. The voltage type converter usually adopts an asymmetric turn-off power device and a diode with the same capacity to form a switch valve of the converter in anti-parallel, the reverse recovery characteristic of the diode and parasitic parameters in a converter circuit can cause ringing phenomenon when the switch valve is conducted, the problem of electromagnetic interference is generated, high-speed signals in equipment are affected, and the reliability of the power device and the converter is seriously reduced.
Ringing is essentially a ringing, although many techniques have been developed at the hardware level to reduce this ringing, such as parallel RLC snubber circuits, bus parasitic inductance reduction, series connection of large resistors in the drive loop, etc. However, the RLC absorption circuit has an excessively large capacitance, which causes heating of the power device, thermal breakdown occurs, and the absorption capability of the RLC absorption circuit for ringing is insufficient. The compact wiring layout reduces the parasitic inductance of the bus bar but also results in heat build up of the converter during long term operation. The rising time of the signal is slowed down by adding the resistor in the driving loop, so that the dead time of the half-bridge circuit is increased, extra loss is added, and the efficiency of the converter is reduced. In addition, the three methods are used for carrying out customized design on each different power transistor, so that development cost and design time are increased.
Disclosure of Invention
The invention provides a ringing suppression circuit based on a gate driver and a control method thereof, which can suppress ringing phenomenon without changing the structure of a converter, so as to improve the reliability of the converter.
The technical scheme adopted by the invention is as follows:
a gate driver based switching ringing suppression circuit, the main circuit comprising: the device comprises a driving circuit 1, a sampling circuit 2 and a main control unit 3, wherein the driving circuit 1 comprises a programmable digital voltage source 4, a current spreading circuit 5, and the main control unit 3 comprises a data detector 6, a driving waveform generator 7 and a power switch controller 8. The output signal of the driving waveform generator 7 in the main control unit 3 is transmitted to the programmable digital voltage source 4 in the driving circuit 1, the output signal of the power switch controller 8 is transmitted to the flow expansion circuit 5 in the driving circuit 1, and the data detector 6 receives and processes the data sent by the sampling circuit 2. The programmable digital voltage source 4 and the negative power supply V in the driving circuit 1 EE The connection current-expanding circuit 5 supplies power to the circuit, and the driving waveform output by the driving circuit 1 passes through the driving resistor R g And then, controlling the switch tube of the measured power. The sampling circuit 2 measures the current i flowing through the power switch tube to be measured C Connected to its collector/drain.
The programmable digital voltage source 4 is mainly composed of a positive power supply U i Negative power supply V EE Energy storage capacitor C, resistor R and triode Q 0 Switch tube Q 1 And Q 2 Controllable precision voltage stabilizing source D 1 And D 2 The structure is mainly used for adjusting the driving voltage and inhibiting ringing in the turn-on process of the power switch tube. The positive power supply U i With negative power supply V EE A positive power supply U for supplying power to the driving circuit 1 i Positive electrode connected with triode Q 0 Positive power supply U i The negative electrode is connected with the ground wire, and the energy storage capacitor C and the positive power supply U i The upper end of the energy storage capacitor C is connected with the positive electrode of the power supply in parallel, and the lower end of the energy storage capacitor C is connected with the negative electrode of the power supply. The switch tube Q 1 And Q is equal to 2 Emitter of (D) is respectively connected with controllable precision voltage stabilizing source D 1 And D 2 Is connected with a cathode of a controllable precise voltage stabilizing source D 1 And D 2 Anode of (B) is grounded, switch tube Q 1 And Q is equal to 2 Is connected with triode Q 0 Is provided. The left end of the resistor R is connected with a triode Q 0 Collector, right end is connected with triode Q 0 And a gate electrode. The triode Q 0 The voltage between the emitter and the ground is the output voltage U O . The circuit of the programmable digital voltage source 4 is to connect a triode Q in series between the input DC voltage and the load 0 When the positive power supply U is input i Or the load resistance value changes to cause the output voltage U O U when changing O Will be reflected to transistor Q 0 To cause the change of the conduction voltage of the triode at the voltage of the emitter junction, thereby adjusting U O To maintain a substantially stable output voltage. Any switch tube Q 1 Or Q 2 The circuit is opened, and the output voltages of the circuit are the voltage values of corresponding controllable precise voltage stabilizing sources. The voltage at two ends of the resistor R is equal to the input positive power supply U i And output voltage U O And (3) a difference. The voltage stabilizing value of the controllable precise voltage stabilizing source is smaller than that of the input positive power supply U i I.e. output voltage U O Less than positive power supply U i A voltage.
The current-spreading circuit 5 comprises a schmitt trigger T 1 NPN triode and PNP triode. The function of the current spreading circuit 5 is to convert a digital signal (low level 0V, high level 3.3V) into an alternating square wave (negative voltage-15V, positive voltage +15v) and amplify the driving capability. Said applicationThe response speed of the mitt trigger, the NPN triode and the PNP triode to the input signal is larger than the switching speed of the controlled power switch tube. The base electrodes of the NPN triode and the PNP triode are connected with the output end of the Schmitt trigger T1; collector of NPN triode is connected with triode Q 0 The collector of PNP triode is connected with negative power supply V EE The method comprises the steps of carrying out a first treatment on the surface of the Driving resistor R connected with emitter of NPN triode and PNP triode g Is the left end of (c). Drive resistor R g The right end of the power switch tube is connected with the base electrode/gate electrode of the power switch tube to be tested. The main control unit 3 outputs multiple paths of control signals to control Q respectively 1 、Q 2 NPN and PNP on and off and controllable precise voltage stabilizing source D 1 And D 2 And the circuit implementation or programming implementation is performed as needed.
The sampling circuit 2 uses a sampling chip to measure the current i of the power switch tube C Sampling in real time, completing analog-to-digital conversion, converting into digital signals acceptable by a control chip, and communicating with the main control unit 3 through parallel port data communication. The sampling interval of the sampling chip cannot be higher than half the current rise time (from 10% of the load current to 90% of the load current).
The data detector 6 is configured to start operating when the output signal of the power switch controller 8 jumps from low level to high level, communicate with the sampling circuit 2 and collect the current i flowing through the power switch tube C 。
The driving waveform generator 7 is configured to trigger after the current data acquired by the data detector 6 reach a set value, and output a serial signal to control the programmable digital voltage source 4.
The power switch controller 8 generates a PWM driving waveform, and provides driving signals for power switch tubes in the converter after the PWM driving waveform is amplified by the current spreading circuit 5 of the driving circuit 1.
A control method of a switch ringing suppression circuit based on a gate driver comprises the following steps:
step one: setting an initial controllable precise voltage stabilizing source D 1 And D 2 Voltage value.
Step two: the power switch controller 8 outputs low powerThe flat driving waveform generator 7 outputs two paths of serial signals to control the controllable precise voltage stabilizing source D 1 And D 2 Clamping the set voltage values respectively.
Step three: the power switch controller 8 outputs high level to start the tested power switch tube and the data detector 6, and meanwhile the switch tube Q of the programmable digital voltage source 4 1 Conduction, Q 2 And (5) switching off.
Step four: when the data detector 6 detects that the current value acquired by the ADC sampling circuit 2 reaches the load current, the switch tube Q of the programmable digital voltage source 4 2 Conduction, Q 1 And (5) switching off.
Step five: when the data detector 6 detects that the current value acquired by the ADC sampling circuit 2 reaches the first peak value, the switch tube Q of the programmable digital voltage source 4 1 Conduction, Q 2 And (5) switching off.
Step six: judging the current i flowing through the power switch tube by the data detector 6 C Whether ringing is present. If present, reducing the controllable precision regulated source D 2 Is set with a set voltage value; if not, the controllable precise voltage stabilizing source D is maintained 2 Is set, the set voltage value of (a).
Step seven: and repeating the second to sixth steps for the next switching period of the tested switching tube.
The beneficial effects of the invention are as follows: the ringing phenomenon of the power switch tube is restrained by adjusting the driving waveform. For power switch tubes of different types or different load conditions, only the voltage value of ringing suppression needs to be adjusted through a program. The invention reduces the cost of the converter, does not need the converter circuit layout and the absorption circuit which are reasonably designed according to different equipment, and simultaneously avoids the extra power loss generated by the parallel absorption circuit.
Drawings
Fig. 1 is a block diagram of a switching ringing suppression circuit of the present invention;
FIG. 2 is a schematic diagram of a driving circuit of the present invention;
FIG. 3 is a schematic diagram of an output drive waveform derived based on a current signal in accordance with the present invention; FIG. 3 (a) shows a waveform i of a current flowing through a power switch tube to be tested C Schematic diagram, figure3 (b) is the output driving voltage v of the switch ringing suppression circuit g A timing diagram;
fig. 4 is a flowchart of a method for controlling the suppression of the ringing of a switch according to the present invention;
fig. 5 is a waveform diagram of current before and after ringing suppression in an embodiment of the present invention;
in the figure: 1 a driving circuit; 2 a sampling circuit; 3, a main control unit; a programmable digital voltage source; 5a current spreading circuit; 6 a data detector; 7, driving a waveform generator; 8 a power switch controller.
Detailed description of the preferred embodiments
The following describes the implementation method of the present invention in detail with reference to the accompanying drawings.
Fig. 1 is a block diagram of a switching ringing suppression circuit of the present invention. Fig. 2 is a schematic diagram of a driving circuit of the present invention. Fig. 3 is a schematic diagram of an output driving waveform obtained based on a current signal according to the present invention. Fig. 4 is a flowchart of a switching ringing suppression control method of the present invention. Fig. 5 is a diagram showing current waveforms before and after ringing suppression in the embodiment of the present invention.
The switch ringing suppression circuit block diagram of fig. 1 includes a driving circuit 1, an adc sampling circuit 2 and a main control unit 3, wherein the driving circuit 1 includes a programmable digital voltage source 4 and a current spreading circuit 5, and the main control unit 3 includes a data detector 6, a driving waveform generator 7 and a power switch controller 8.
The driving waveform generator 7 in the main control unit 3 outputs signals to the programmable digital voltage source 4 in the driving circuit 1, the power switch controller 8 outputs signals to the spreading circuit 5 in the driving circuit 1, and the data detector 6 receives and processes the data sent by the sampling circuit 2. Programmable digital voltage source 4 and negative power supply V in driving circuit 1 EE The connection current-expanding circuit 5 supplies power to the circuit, and the driving waveform output by the driving circuit 1 passes through the driving resistor R g And then, controlling the switch tube of the measured power. The sampling circuit 2 measures the current i flowing through the power switch tube to be measured C Connected to its collector/drain.
In the driving circuit diagram of FIG. 2, a positive power supply U i With negative power supply V EE A positive power supply U for supplying power to the driving circuit 1 i Positive electrode connected with triode Q 0 Positive power supply U i The negative electrode is connected with the ground wire, the energy storage capacitor C and the input power supply U i The upper end of the energy storage capacitor C is connected with the positive electrode of the power supply in parallel, and the lower end of the energy storage capacitor C is connected with the negative electrode of the power supply. Switch tube Q 1 And Q is equal to 2 Emitter of (D) is respectively connected with controllable precision voltage stabilizing source D 1 And D 2 Is connected with a cathode of a controllable precise voltage stabilizing source D 1 And D 2 Anode of (B) is grounded, switch tube Q 1 And Q is equal to 2 Is connected with triode Q 0 Is provided. The left end of the resistor R is connected with the triode Q 0 Collector, resistor right end connect triode Q 0 And a gate electrode. Triode Q 0 The voltage between the emitter and the ground is the output voltage U O . The base electrodes of the NPN triode and the PNP triode are connected with the output end of the Schmidt trigger T1; collector of NPN triode is connected with triode Q 0 The collector of PNP triode is connected with negative power supply V EE The method comprises the steps of carrying out a first treatment on the surface of the Driving resistor R connected with emitter of NPN triode and PNP triode g Is the left end of (c). Drive resistor R g The right end of the power switch tube is connected with the base electrode/gate electrode of the power switch tube to be tested. The main control unit 3 outputs multiple paths of control signals to control Q respectively 1 、Q 2 NPN and PNP on and off and controllable precise voltage stabilizing source D 1 And D 2 Can be implemented as a circuit or as a program, as desired.
Fig. 3 is a schematic diagram showing waveforms of the output of the switching ringing suppression circuit according to the present invention, at t 0 At the moment, the switching ringing suppression circuit outputs a voltage v g From V EE Converting to positive voltage; at t 1 Time of day, i.e. the current i flowing through the power switching tube C Reaching the load current I L When the voltage value output by the circuit is changed; at t 2 Time of day, i.e. the current i flowing through the power switching tube C Reaching the maximum current I P When the voltage value output by the circuit is restored to t 0 To t 1 Voltage of the same.
Fig. 4 is a control method of the present invention, comprising the steps of:
step one: setting an initial controllable precise voltage stabilizing source D 1 And D 2 The voltage values were 15V.
Step two: the power switch controller 8 outputs a low level, and the driving circuit 1 outputs V EE The driving waveform generator 7 outputs two paths of serial signals to control the controllable precise voltage stabilizing source D 1 And D 2 Clamping the set voltage values respectively.
Step three: the power switch controller 8 is at t 0 The time output high level starts the tested power switching tube and the data detector 6, and meanwhile, the switching tube Q of the programmable digital voltage source 4 1 Conduction, Q 2 And (5) switching off. It is necessary to provide a large voltage to the gate of the power switch at this stage so that the input capacitance charges quickly.
Step four: at t 1 The time data detector 6 detects that the current value acquired by the sampling circuit 2 reaches the load current I L Switching tube Q of programmable digital voltage source 4 2 Conduction, Q 1 And (5) switching off. At this stage it is necessary to reduce the charging speed of the gate current.
Step five: at t 2 When the time data detector 6 detects that the current value acquired by the sampling circuit 2 reaches the first peak value, the switch tube Q of the programmable digital voltage source 4 1 Conduction, Q 2 And (5) switching off. The gate electrode of the power switch tube recovers the large voltage at the stage, and the input capacitor is continuously charged rapidly.
Step six: judging the current i flowing through the power switch tube by the data detector 6 C Whether ringing is present. Controllable precision regulated source D, if present 2 Is reduced by 1V; if not, the controllable precise voltage stabilizing source D is maintained 2 Is set, the set voltage value of (a).
Step seven: and repeating the second to sixth steps for the next switching period of the tested switching tube.
FIG. 5 shows the current i in the first switching cycle and the tenth switching cycle C As can be seen, in the first switching cycle (shown in dashed lines in fig. 5), the maximum amplitude of ringing is 22.5A; after ten switching cycles of control (shown by the dashed line in fig. 5), the ringing phenomenon disappears.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (4)
1. The switching ringing suppression circuit based on the gate driver is characterized in that a main circuit of the switching ringing suppression circuit comprises a driving circuit (1), a sampling circuit (2) and a main control unit (3), wherein the driving circuit (1) comprises a programmable digital voltage source (4) and a current spreading circuit (5), and the main control unit (3) comprises a data detector (6), a driving waveform generator (7) and a power switch controller (8); the output signal of the driving waveform generator (7) is transmitted to the programmable digital voltage source (4), the output signal of the power switch controller (8) is transmitted to the current spreading circuit (5), and the data detector (6) receives and processes the data sent by the sampling circuit (2); the programmable digital voltage source (4) and the negative power supply V EE The connection current-expanding circuit (5) supplies power to the current-expanding circuit; the sampling circuit (2) measures the current flowing through the detected power switching tube and is connected with the collector electrode/drain electrode of the detected power switching tube;
the programmable digital voltage source (4) mainly consists of a positive power supply U i Negative power supply V EE Energy storage capacitor C, resistor R and triode Q 0 Switch tube Q 1 And Q 2 Controllable precision voltage stabilizing source D 1 And D 2 The power switch tube is used for adjusting the driving voltage in the opening process of the power switch tube to be tested and inhibiting ringing; the positive power supply U i With negative power supply V EE Is a power supply and a positive power supply U of the driving circuit (1) i Positive electrode connected with triode Q 0 Is a positive power supply U i The negative electrode is connected with the ground wire, and the energy storage capacitor C and the positive power supply U i The upper end of the energy storage capacitor C is connected with the positive electrode of the positive power supply, and the lower end of the energy storage capacitor C is connected with the negative electrode of the positive power supply; the switch tube Q 1 And Q is equal to 2 The collector electrode of (C) is respectively connected with a controllable precise voltage stabilizing source D 1 And D 2 Is connected with the anode of the controllable precise voltage stabilizing source D 1 And D 2 Cathode of (C) is connected with triode Q 0 Base of (2), switch tube Q 1 And Q is equal to 2 The emitter of (2) is grounded; the left end of the resistor R is connected with a triode Q 0 Collector, right end is connected with triode Q 0 A base; the triode Q 0 The voltage between the emitter and the ground is the output voltage U O The method comprises the steps of carrying out a first treatment on the surface of the The circuit of the programmable digital voltage source (4) is connected in series with a triode Q between the input direct-current voltage and a load 0 When the power supply U is positive i Or the load resistance value changes to cause the output voltage U O U when changing O Will be reflected to transistor Q 0 To cause the change of the conduction voltage of the triode at the voltage of the emitter junction, thereby adjusting U O To maintain a substantially stable output voltage; any switch tube Q 1 Or Q 2 Turn on, output voltage U thereof O Are all corresponding controllable precise voltage stabilizing sources D 1 And D 2 Voltage value of (2); the voltage at two ends of the resistor R is equal to the positive power supply U i And output voltage U O A difference between; controllable precise voltage stabilizing source D 1 And D 2 Yu Zhengdian source U with smaller regulated voltage value i I.e. output voltage U O Less than positive power supply U i A voltage;
the current-spreading circuit (5) comprises a Schmitt trigger T 1 An NPN triode and a PNP triode; the current-spreading circuit (5) is used for converting the digital signal into an alternating square wave and amplifying the driving capability; the base electrodes of the NPN triode and the PNP triode are connected with the output end of the Schmitt trigger T1; collector of NPN triode is connected with triode Q 0 The collector of PNP triode is connected with negative power supply V EE The method comprises the steps of carrying out a first treatment on the surface of the Driving resistor R connected with emitter of NPN triode and PNP triode g Is arranged at the left end of the frame; drive resistor R g The right end of the power switch tube is connected with the base electrode/gate electrode of the power switch tube to be tested; the main control unit (3) outputs multipath control signals to respectively control Q 1 、Q 2 The NPN triode and the PNP triode are switched on and off, and the controllable precise voltage stabilizing source D 1 And D 2 According to the requirement, implementing a circuit or programming;
the sampling circuit (2) uses a sampling chip to sample the current i of the power switch tube to be tested C Sampling in real time and completing analog-to-digital conversion to control chipThe receivable digital signals are communicated with the main control unit (3) through parallel port data communication;
the data detector (6) is configured to start working when the output signal of the power switch controller (8) jumps from low level to high level, and is communicated with the sampling circuit (2) and collects the current i flowing through the detected power switch tube C ；
The driving waveform generator (7) is configured to trigger after the current data acquired by the data detector (6) reach a set value, and output a serial signal to control the programmable digital voltage source (4);
the power switch controller (8) generates PWM driving waveforms, and the PWM driving waveforms are amplified by the current amplifying circuit (5) of the driving circuit (1) to provide driving signals for the tested power switch tube in the converter.
2. The switching ringing suppression circuit based on a gate driver of claim 1, wherein the schmitt trigger, NPN transistor and PNP transistor have a response speed to an input signal greater than a switching speed of a power switch under test.
3. A gate driver based switching ringing suppression circuit according to claim 1 or 2, characterized in that the sampling interval of the sampling chip of the sampling circuit (2) cannot be higher than half the current rise time, which is the time from 10% of the load current to 90% of the load current.
4. A control method of a switching ringing suppression circuit based on a gate driver according to any one of claims 1 to 3, comprising the steps of:
step one: setting an initial controllable precise voltage stabilizing source D 1 And D 2 Voltage value of (2);
step two: the power switch controller (8) outputs low level, and the driving waveform generator (7) outputs two paths of serial signals to control the controllable precise voltage stabilizing source D 1 And D 2 Clamping the set voltage values respectively;
step three:the power switch controller (8) outputs high level to start the tested power switch tube and the data detector (6), and meanwhile, the switch tube Q of the digital voltage source (4) can be programmed 1 Conduction, Q 2 Turning off;
step four: when the data detector (6) detects that the current value acquired by the sampling circuit (2) reaches the load current, the switch tube Q of the programmable digital voltage source (4) 2 Conduction, Q 1 Turning off;
step five: when the data detector (6) detects that the current value acquired by the sampling circuit (2) reaches a first peak value, the switch tube Q of the programmable digital voltage source (4) 1 Conduction, Q 2 Turning off;
step six: judging the current i flowing through the switch tube of the tested power by a data detector (6) C Whether ringing exists; if present, reducing the controllable precision regulated source D 2 Is set with a set voltage value; if not, the controllable precise voltage stabilizing source D is maintained 2 Is set with a set voltage value;
step seven: and repeating the second to sixth steps for the next switching period of the detected power switching tube.
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| CN202010172966.9A CN111431395B (en) | 2020-03-13 | 2020-03-13 | Switch ringing suppression circuit based on gate driver and control method thereof |
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| CN202010172966.9A CN111431395B (en) | 2020-03-13 | 2020-03-13 | Switch ringing suppression circuit based on gate driver and control method thereof |
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| CN112684238B (en) * | 2021-01-08 | 2024-05-24 | 四川湖山电器股份有限公司 | Switch power tube load current real-time monitoring circuit and monitoring system |
| CN113067991A (en) * | 2021-03-30 | 2021-07-02 | 中国科学院长春光学精密机械与物理研究所 | Self-defined waveform driving circuit |
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| CN101645993A (en) * | 2009-06-26 | 2010-02-10 | 蒋菊生 | Switch for controlling ringing of telephone |
| CN102790735A (en) * | 2011-05-16 | 2012-11-21 | 株式会社电装 | Ringing suppression circuit |
| CN106130524A (en) * | 2016-06-14 | 2016-11-16 | 圣邦微电子（北京）股份有限公司 | Self adaptation ring cancellation gate driver circuit and driver |
| CN108982998A (en) * | 2018-07-12 | 2018-12-11 | 浙江大学 | A kind of detection circuit and detection method of on-line checking binding line ageing process |
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| JP6819256B2 (en) * | 2016-12-07 | 2021-01-27 | 富士電機株式会社 | A drive circuit and a semiconductor module including the circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645993A (en) * | 2009-06-26 | 2010-02-10 | 蒋菊生 | Switch for controlling ringing of telephone |
| CN102790735A (en) * | 2011-05-16 | 2012-11-21 | 株式会社电装 | Ringing suppression circuit |
| CN106130524A (en) * | 2016-06-14 | 2016-11-16 | 圣邦微电子（北京）股份有限公司 | Self adaptation ring cancellation gate driver circuit and driver |
| CN108982998A (en) * | 2018-07-12 | 2018-12-11 | 浙江大学 | A kind of detection circuit and detection method of on-line checking binding line ageing process |
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