CN107040245A - Kiloampere heavy current pulse signal generation device and DIDT test equipments - Google Patents
Kiloampere heavy current pulse signal generation device and DIDT test equipments Download PDFInfo
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/53—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
- H03K3/57—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a semiconductor device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/08116—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit in composite switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
- H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/02—Shaping pulses by amplifying
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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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Abstract
The present invention discloses a kind of kiloampere heavy current pulse signal generation device and DIDT test equipments, kiloampere heavy current pulse signal generation device includes high voltage power supply, high-voltage capacitance group module, square-wave signal and occurs module, drive module and IGBT, the input of high voltage power supply is used for incoming transport power supply, the cathode power supply end of high voltage power supply is connected with the electrode input end of high-voltage capacitance group module, the negative electricity source of high voltage power supply is connected with the negative input of high-voltage capacitance group module, and the cathode output end of high-voltage capacitance group module and IGBT colelctor electrode are connected；The cathode output end of high-voltage capacitance group module and IGBT emitter stage are connected；The output end of module occurs for square-wave signal and the input of drive module is connected；The output end of drive module and IGBT gate pole are connected.The present invention realizes the standard block output of pulse signal of highest kilo-ampere level, to match the rated current of test product, truly reflects test product dynamic response data.
Description
Technical Field
The invention relates to the technical field of test equipment, in particular to a kiloampere large-current pulse signal generating device and DIDT test equipment.
Background
A high-current rapid dynamic response testing device from hundreds of amperes to kiloamperes is still blank at present, and particularly in the field of Hall sensors, the testing device is almost free from the application in the aspect.
For example: the di/di test of the Hall current sensor is an important technical index in the Hall current sensor, the rated current of the conventional Hall current sensor is mostly different from 50A to 2000A, the conventional power pulse signal power generator is only about 1A, and the method for measuring the response time of the conventional Hall current sensor is generally to use a method of winding a plurality of turns at the primary measuring end of the conventional Hall current sensor to test the di/dt characteristic of the Hall current sensor.
However, the pulse current provided by the test mode is small in amplitude, the test line is too long, the accumulated inductance is large, the rising and falling waveforms of the sensor cannot be truly and accurately reflected, and the errors of the measured waveform and data are large. The actual requirements of the product cannot be met. Greatly influencing the performance of the tested product.
Disclosure of Invention
The invention mainly aims to provide a kiloamp high-current pulse signal generating device and DIDT testing equipment, and aims to realize the output of a high-current standard square wave pulse signal from a hundred-ampere level to a kiloamp level so as to match the rated current of a tested product and truly reflect the dynamic response data of the tested product.
In order to achieve the above object, the kiloampere high-current pulse signal generating device provided by the present invention is applied to a dynamic product test and a DIDT test, and comprises a high-voltage power supply, a high-voltage capacitor bank module, a square wave signal generating module, a driving module, and an IGBT, wherein an input end of the high-voltage power supply is used for accessing an ac power supply, a positive power end of the high-voltage power supply is connected with a positive input end of the high-voltage capacitor bank module, a negative power end of the high-voltage power supply is connected with a negative input end of the high-voltage capacitor bank module, and a positive output end of the high-voltage capacitor bank module is connected with a collector of the IGBT; the negative electrode output end of the high-voltage capacitor bank module is connected with the emitting electrode of the IGBT; the output end of the square wave signal generating module is connected with the input end of the driving module; the output end of the driving module is connected with the gate pole of the IGBT; wherein,
the high-voltage capacitor bank module is used for storing the electric energy provided by the high-voltage power supply and outputting high-power constant current;
the square wave signal generating module is used for generating square wave signals;
the driving module is used for generating a driving signal when receiving the square wave signal;
and the IGBT is used for carrying out high-power switch driving according to the driving signal so as to convert the high-power electric quantity stored energy in the high-voltage capacitor bank module into rapid high-power constant current output.
Preferably, the kiloamp large-current pulse signal generating device further comprises a capacitive load resistance module, and the capacitive load resistance module is connected in series between the high-voltage capacitor bank module and the collector of the IGBT.
Preferably, the kiloamp large-current pulse signal generating device further comprises a testing tool, and the testing tool is arranged between the capacitive load resistance module and the collector of the IGBT in series.
Preferably, the kiloamp large-current pulse signal generating device further comprises a control module for controlling the square wave signal generating module to work, and an output end of the control module is connected with a controlled end of the square wave signal generating module.
Preferably, the square wave signal generating module includes a first triode, a first switch, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a first trigger, a second trigger, a third trigger, a fourth trigger, a fifth trigger, a sixth trigger, a first capacitor, a second capacitor, a first diode, a second diode, a third diode, a first potentiometer, a second potentiometer, a third potentiometer and a photoelectric converter, and the photoelectric converter includes a transmitting unit and a receiving unit; the first end of the first switch is connected with the first end of the first resistor, and the second end of the first switch is interconnected with the first end of the first capacitor, the first fixed contact of the first potentiometer, the moving contact and the anode of the first diode and is grounded; the second end of the first resistor is interconnected with the first end of the second resistor, the input end of the first trigger and the second end of the first capacitor; the second end of the second resistor is connected with a first direct current power supply end; the output end of the first trigger is interconnected with the first end of the third resistor, the second stationary contact of the first potentiometer and the input end of the second trigger through the second capacitor, and the second end of the third resistor is connected with the cathode of the first diode; the output end of the second trigger is interconnected with the base electrode of the first triode and the first end of the fifth resistor through the fourth resistor; a second end of the fifth resistor is grounded, a collector of the first triode is interconnected with an input end of the third trigger, a first end of the seventh resistor and a first end of the eighth resistor through the sixth resistor, and an emitter of the first triode is grounded; the output end of the third trigger is interconnected with the input ends of the fourth trigger, the fifth trigger and the sixth trigger, the anode of the second diode and the cathode of the third diode; a second end of the seventh resistor is connected with a first fixed contact of the second potentiometer; a second end of the eighth resistor is connected with a first fixed contact of the third potentiometer; a second fixed contact of the second potentiometer is interconnected with the movable contact and a cathode of the second diode; a second fixed contact of the third potentiometer is interconnected with the movable contact and an anode of the third diode; the output ends of the fourth trigger, the fifth trigger and the sixth trigger are respectively connected with the anode of the sending unit through the ninth resistor, the tenth resistor and the eleventh resistor; the cathode of the sending unit is grounded, the collector of the receiving unit is the output end of the square wave signal generating module and is connected with the first direct current power supply end, and the emitter of the receiving unit is grounded.
Preferably, the pulse signal amplification module includes an IGBT driving optocoupler, a second triode, a third triode, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a fourth diode, a fifth diode, a third capacitor, and a fourth capacitor, the IGBT driving optocoupler includes an inverted signal trigger pin, a common pin, and a driving signal output pin, the signal trigger pin is connected to the output end of the square wave signal generation module via the twelfth resistor, the driving signal output pin is interconnected with the first end of the thirteenth resistor and the first end of the fourteenth resistor, and the second end of the thirteenth resistor is interconnected with the first end of the third capacitor, the base of the second triode, and the base of the third triode; a second end of the fourteenth resistor and a second end of the third capacitor are both connected with a second direct current power supply end; a collector of the second triode is connected with a third direct current power supply end, an emitter of the second triode and an emitter of the third triode are respectively interconnected with a gate electrode of the IGBT, a first end of the fourth capacitor and a first end of the seventeenth resistor through the fifteenth resistor and the sixteenth resistor, and a collector of the third triode is connected with the second direct current power supply end; a second end of the fourth capacitor and a second end of the seventeenth resistor are respectively connected with an emitter of the IGBT; the common end is connected with the anode of the fourth diode, and the cathode of the fourth diode is connected with the anode of the fifth diode through the eighteenth resistor; the cathode of the fifth diode is connected with the anode of the sixth diode, and the cathode of the sixth diode is connected with the emitter of the IGBT.
Preferably, the kiloamp large-current pulse signal generating device further comprises an IGBT protection module, the driver IC further comprises a voltage detection pin and a fault signal output pin, the IGBT protection module comprises an optocoupler, a fourth triode, a fifth triode, a relay, a double diode, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a fifth capacitor and a sixth capacitor, the voltage detection pin is connected with the eighteenth resistor, and the fault signal output pin is interconnected with a first end of the twentieth resistor, a first end of the fifth capacitor and a base of the fourth triode through the nineteenth resistor; a second end of the twentieth resistor is interconnected with a second end of the fifth capacitor, an emitter of the fourth triode and the first direct-current power supply end; a collector of the fourth triode is interconnected with a first end of the twenty-first resistor and a first end of the twenty-second resistor; a second end of the twenty-first resistor is connected with an anode of the sending unit; a second end of the twenty-second resistor is interconnected with an anode of the optocoupler, a first end of the twenty-third resistor and a first end of the sixth capacitor, and a cathode of the optocoupler, a second end of the twenty-third resistor and a second end of the sixth capacitor are all grounded; a collector of the optocoupler is interconnected with an anode of the double diode, the first end of the relay coil, a collector of the fifth triode and the second direct current power supply end, and an emitter of the optocoupler is interconnected with a first end of the twenty-fourth resistor and an emitter of the fifth triode; and the cathode of the double diode and the second end of the relay coil are respectively connected with the third direct current power supply end.
Preferably, the kiloampere large-current pulse signal generating device further comprises a direct-current power supply module, the signal generating module comprises the direct-current power supply module which comprises a first power supply conversion module and a second direct-current power supply conversion module, the input ends of the first direct-current power supply conversion module and the second direct-current power supply conversion module are used for being connected with an alternating-current power supply, and the output ends of the first direct-current power supply conversion module and the second direct-current power supply conversion module are respectively connected with the power end of the square-wave signal generating module.
Preferably, the first power conversion module includes a power input terminal, a rectifier diode, a filter module, a first buck chip, a first filter capacitor, and a second filter capacitor, the power input terminal is configured to be connected to a power supply, an anode of the rectifier diode is connected to the power input terminal, and a cathode of the rectifier diode is connected to an input terminal of the filter module; a first output end of the filtering module is connected with a positive input end of the first voltage reduction chip, and a second output end of the filtering module is connected with a negative input end of the first voltage reduction chip; the positive output end of the first voltage reduction chip is the first direct current power supply end and is connected with the first ends of the first filter capacitor and the second filter capacitor, and the negative output end of the first voltage reduction chip is grounded with the second ends of the first filter capacitor and the second filter capacitor.
Preferably, the second power conversion circuit includes a second buck chip, a third filter capacitor, a fourth filter capacitor, a fifth filter capacitor, a twenty-fifth resistor, and a zener diode, an anode input end of the second buck chip is connected to the first output end of the filter module, and a cathode input end of the second buck chip is connected to the second output end of the filter module; the positive output end of the second buck chip is the third direct-current power supply end and is connected with the third filter capacitor, the fourth filter capacitor and the first end of the twenty-fifth resistor, and the negative output end of the second buck chip is the second direct-current power supply end and is interconnected with the third filter capacitor, the second end of the third filter capacitor, the first end of the fifth filter capacitor and the anode of the voltage stabilizing diode; and the cathode of the voltage stabilizing diode and the second end of the fifth filter capacitor are grounded, and the second end of the twenty-fifth resistor is grounded.
The invention also provides DIDT testing equipment, which comprises the kiloamp high-current pulse signal generating device; the kiloampere large-current pulse signal generating device comprises a high-voltage power supply, a high-voltage capacitor bank module, a square wave signal generating module, a driving module and an IGBT, wherein a positive power supply end of the high-voltage power supply is connected with a positive input end of the high-voltage capacitor bank module, a negative power supply end of the high-voltage power supply is connected with a negative input end of the high-voltage capacitor bank module, and a positive output end of the high-voltage capacitor bank module is connected with a collector electrode of the IGBT; the negative electrode output end of the high-voltage capacitor module is connected with the emitting electrode of the IGBT; the output end of the square wave signal generating module is connected with the input end of the driving module; the output end of the driving module is connected with the gate pole of the IGBT; the high-voltage capacitor bank module is used for receiving the high-voltage power supply and storing energy; the square wave signal generating module is used for generating square wave signals; the driving module is used for generating a driving signal when receiving the square wave signal; and the IGBT is used for switching on/off according to the driving signal so as to convert the energy storage signal of the high-voltage capacitor bank module into a pulse signal and output the pulse signal.
The kiloampere high-current pulse signal generating device generates a square wave signal by arranging a square wave signal generating module, outputs the square wave signal to a driving module so as to enable the driving module to drive an IGBT (insulated gate bipolar translator) to work, performs switch driving according to the driving signal, outputs an energy storage signal of a high-voltage capacitor bank module to a current loop when the IGBT is switched on, and stops outputting a superposed signal of a power signal output by a high-voltage power supply and the energy storage signal of the high-voltage capacitor bank module to the current loop when the IGBT is switched off, so that high-power electric quantity energy storage in the high-voltage capacitor bank module is converted into rapid high-power constant current output, and high-current standard square wave pulse signal output from a Baian ampere level to a kiloampere level is realized. The kiloamp high-current pulse signal generating device solves the problems that the pulse current amplitude is small, a test line is too long, the accumulated inductance is large, the rising and falling waveforms of a sensor cannot be truly and accurately reflected, the errors of the measured waveform and data are large, the actual needs of products cannot be met, and the performance of the measured products is greatly influenced in the conventional pulse signal generator.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a functional block diagram of a first embodiment of a kiloamp high current pulse signal generating device applied to DIDT testing equipment according to the present invention;
fig. 2 is a schematic circuit structure diagram of a square wave signal generating module in the square wave signal generating module shown in fig. 1;
fig. 3 is a schematic circuit structure diagram of a square wave signal amplifying module in the square wave signal generating module shown in fig. 1;
fig. 4 is a schematic circuit structure diagram of an IGBT protection module in the square wave signal generation module shown in fig. 1;
fig. 5 is a schematic circuit structure diagram of a reset circuit in the square wave signal generation module shown in fig. 1;
fig. 6 is a schematic structural diagram of the first and second power conversion circuits and the kiloamp high-current pulse signal generation apparatus shown in fig. 1.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a kiloampere large-current pulse signal generating device which is applied to DIDT testing equipment.
Referring to fig. 1, in an embodiment of the present invention, the kiloamp large-current pulse signal generating device includes a high-voltage power supply 10, a high-voltage capacitor bank module 20, an IGBT, a square-wave signal generating module 30, and a driving module 40, an input end of the high-voltage power supply is used for accessing an AC power supply, an anode power end of the high-voltage power supply 10 is connected to an anode input end of the high-voltage capacitor bank module 20, a cathode power end of the high-voltage power supply 10 is connected to a cathode input end of the high-voltage capacitor bank module 20, and an anode output end of the high-voltage capacitor bank module 20 is connected to a collector of the IGBT; the negative electrode output end of the high-voltage capacitor bank module 20 is connected with the emitting electrode of the IGBT; the output end of the square wave signal generating module 30 is connected with the input end of the driving module 40; the output end of the driving module 40 is connected with the gate pole of the IGBT; wherein,
the high-voltage capacitor bank module 20 is used for storing the electric energy provided by the high-voltage power supply 10 and providing high-power constant current;
the square wave signal generating module 30 is configured to generate a square wave signal;
the driving module 40 is configured to generate a driving signal when receiving the square wave signal;
and the IGBT is used for performing high-power switch driving according to the driving signal so as to convert the high-power electric quantity stored energy in the high-voltage capacitor bank module 20 into rapid high-power constant current output.
The high-voltage power supply 10 is a high-voltage direct-current power supply, is adjustable between 0 and 500V, and is used for converting an input alternating-current power supply AC into a high-voltage direct-current power supply and then outputting the high-voltage direct-current power supply. The high-voltage capacitor bank module 20 stores electric energy of an input high-voltage direct-current power supply and releases constant current when the IGBT is turned on so as to generate a large-current pulse signal, wherein the high-voltage capacitor bank module 20 is composed of high-voltage and large-capacity capacitors such as a large-capacity electrolytic capacitor and a large-capacity nonpolar non-inductive capacitor, and the high-voltage capacitor bank module 20 is used for storing electric energy and ensuring continuous constant current output during the turn-on period of the IGBT. The square wave signal generating module 30 is configured to generate a square wave signal and output the square wave signal to the IGBT to control the IGBT to turn on/off. The IGBT consists of an upper bridge arm IGBT and a lower bridge arm IGBT, the fast turn-off of the lower bridge arm IGBT is realized through a fast reaction diode of the upper bridge arm IGBT, the lower bridge arm IGBT is used for performing switch driving according to the square wave signal, so as to convert the high-power electric quantity stored in the high-voltage capacitor bank module 20 into a rapid high-power constant current output, specifically, when the IGBT is turned on, the current loop outputs the energy storage signal of the high-voltage capacitor bank module 20, which is equivalent to outputting a high-level, large-current constant current signal, when the IGBT is closed, the current loop is turned off, which corresponds to a low-level signal being output, and thus, the square wave signal generated by the square wave signal generating module 30 is output to the driving module 40 to control the on/off of the IGBT under the driving of the driving module 40, therefore, when the IGBT is instantly switched on, the current loop obtains a square wave pulse signal with high power and constant current.
The kiloamp large-current pulse signal generating device generates a square wave signal by arranging the square wave signal generating module 30 and outputs the square wave signal to the driving module 40, so that the driving module 40 drives the IGBT to perform high-power switch driving according to the square wave signal. Specifically, when the IGBT is turned on, the energy storage signal of the high-voltage capacitor bank module 20 is output to a current loop to provide a sufficiently large constant current, so that the IGBT can quickly establish a gate control electric field to be turned on; when the IGBT is closed, the high-voltage power supply 10 stops outputting the energy storage signal of the high-voltage capacitor bank module 20 to a current loop, so that the high-power electric quantity energy storage in the high-voltage capacitor bank module is converted into rapid high-power constant current output, the output of a high-current standard square wave pulse signal from a hundred-ampere level to a kilo-ampere level is realized, the rated current of a tested product is matched, and the dynamic response data of the tested product is truly reflected. The kiloamp high-current pulse signal generating device solves the problems that the pulse current amplitude is small, a test line is too long, the accumulated inductance is large, the rising and falling waveforms of a sensor cannot be truly and accurately reflected, the errors of the measured waveform and data are large, the actual needs of products cannot be met, and the performance of the measured products is greatly influenced in the conventional pulse signal generator.
Referring to fig. 1, in a preferred embodiment, the kiloamp high-current pulse signal generating device further includes a capacitive load resistance module 50, and the capacitive load resistance module 50 is connected in series between the high-voltage capacitor bank module and the collector of the IGBT.
In this embodiment, the capacitive load resistance module 50 is configured to adjust a voltage output by the high-voltage power supply, so as to control a current of the current loop, and further obtain a pulse square wave matched with a rated current amplitude of the hall sensor to be measured. The invention realizes the adjustability of the current amplitude of the pulse signal.
Referring to fig. 1, in a preferred embodiment, the large current pulse generating circuit further includes a testing tool 60, and the testing tool is serially connected to the positive power end of the high voltage power supply 10 and the input end of the IGBT.
In this embodiment, the test fixture 60 is detachably and electrically connected to the switching power supply 10 and the IGBT, and may be a metal column made of metal materials such as copper, and the test fixture 60 is equivalent to a test board, for example: when the dynamic response time of the Hall sensor is tested, the single-turn conduction 50 penetrates through the circle center position of the through hole of the Hall sensor to be tested, and a pulse signal of a large current is output to the primary measuring end of the Hall sensor to be tested, so that the test precision of the dynamic response time is improved. In addition, because the mode of testing the tool is adopted for measuring the Hall sensor, the manual winding is not needed, the testing workload is reduced, and the testing efficiency is improved.
Referring to fig. 1 to 6, in a preferred embodiment, the square wave signal generating module 30 includes a first triode Q1, a first switch S1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R8, a tenth resistor R8, an eleventh resistor R8, a twelfth resistor R8, a first flip-flop U1 8, a second flip-flop U1 8, a third flip-flop U1 8, a fourth flip-flop U1 8, a fifth flip-flop U1 8, a sixth flip-flop U1 8, a first capacitor C8, a second capacitor C8, a first diode D8, a second diode D8, a third diode D8, a first potentiometer W252w 25272, a first potentiometer R8, a photoelectric converter unit 36411, and a photoelectric converter unit 36411; a first terminal of the first switch S1 is connected to a first terminal of the first resistor R1, and a second terminal of the first switch S1 is interconnected to the first terminal of the first capacitor C1, the first fixed contact and the movable contact of the first potentiometer W1 and the anode of the first diode D1, and is grounded; a second terminal of the first resistor R1 is interconnected with a first terminal of the second resistor R2, an input terminal of the first flip-flop U1A, and a second terminal of the first capacitor C1; a second end of the second resistor R2 is connected to a second dc power supply terminal VCC 2; the output end of the first flip-flop U1A is interconnected with the first end of the third resistor R3, the second stationary contact of the first potentiometer W1 and the input end of the second flip-flop U1B through the second capacitor C2, and the second end of the third resistor R3 is connected with the cathode of the first diode D1; the output terminal of the second flip-flop U1B is interconnected with the base of the first transistor Q1 and the first terminal of the fifth resistor R5 through the fourth resistor R4; the second end of the fifth resistor R5 is grounded, the collector of the first transistor Q1 is interconnected with the input terminal of the third flip-flop U1C, the first end of the seventh resistor R7 and the first end of the eighth resistor R8 via the sixth resistor R6, and the emitter of the first transistor Q1 is grounded; the output of the third flip-flop is interconnected with the input of the fourth flip-flop U1D, the fifth flip-flop U1E, the sixth flip-flop U1F, the anode of the second diode D2 and the cathode of the third diode D3; a second end of the seventh resistor R7 is connected with a first fixed contact of the second potentiometer W2; a second end of the eighth resistor R8 is connected with a first stationary contact of the third potentiometer W3; a second stationary contact of the second potentiometer W2 is interconnected with the movable contact and the cathode of the second diode D2; a second stationary contact of the third potentiometer W3 is interconnected with the movable contact and the anode of the third diode D3; the output ends of the fourth flip-flop U1D, the fifth flip-flop U1E and the sixth flip-flop U1F are connected to the anode of the transmitting unit T2521Z via the ninth resistor R9, the tenth resistor R10 and the eleventh resistor R11, respectively; the cathode of the transmitting unit T2521Z is grounded, the collector of the receiving unit R2521Z is the output terminal of the square-wave signal generating module 30 and is connected to the second dc power source terminal VCC2, and the emitter of the receiving unit R2521Z is grounded.
In this embodiment, the first capacitor C1 is used for filtering noise in the power supply, and the second capacitor C2 is used for coupling the square wave signal generated by the first flip-flop U1A to the second flip-flop U1B. The flip-flops U1A, U1B, U1C, U1D, U1E and U1F are used for performing high-low level conversion to generate square wave signals and improve the driving capability of the IGBT, and the flip-flops U1A, U1B, U1C, U1D, U1E and U1F are integrated in the same integrated chip, such as a 74HC14 Schmitt trigger, so that the size of a PCB (printed Circuit Board) of the square wave signal generation module is reduced, and the power consumption and the production cost of the circuit are reduced. The first potentiometer W1 is used for correcting the square wave signal, the fourth resistor R4 and the fifth resistor R5 are connected in series to divide the voltage to adjust the conduction degree of the first transistor Q1, so as to adjust the amplitude of the square wave signal, and the second potentiometer W2 and the third potentiometer W3 are used for adjusting the duty ratio of the square wave signal. When the first switch S1 is closed, the flip-flops U1A, U1B, U1C, U1D, U1E and U1F generate a square wave signal with a momentary low voltage, so that the transmitting unit T2521Z in the photoelectric converter 411 is turned on, and the receiving unit R2521Z in the photoelectric converter 411 is triggered to be turned on by the photoelectric conversion effect, thereby outputting the square wave signal.
Further, the square wave signal generating module 30 further includes a toggle switch J3 and a capacitor C41, the toggle switch J3 is disposed in parallel at two ends of the fifth resistor R5 and is used for controlling to output a continuous pulse/monopulse square wave signal, and the capacitor C41 is disposed in series between the input end of the third flip-flop U1C and the ground and is used for filtering noise in the square wave signal.
Referring to fig. 1 to 6, in a preferred embodiment, the driving module 40 includes an IGBT driving optocoupler IC1, a second transistor Q2, a third transistor Q3, a twelfth resistor R12A, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a fourth diode D4, a fifth diode D5, a third capacitor C3, and a fourth capacitor C4, the IGBT driving optocoupler IC1 comprises an inverse signal trigger pin, a common pin and a driving signal output pin, the signal trigger pin is connected with the output end of the square wave signal generating module 30 through the twelfth resistor R12A, the driving signal output pin is interconnected with a first terminal of the thirteenth resistor R13 and a first terminal of the fourteenth resistor R14, a second terminal of the thirteenth resistor R13 is interconnected with a first terminal of a third capacitor C3, a base of the second transistor Q2, and a base of the third transistor Q3; a second end of the fourteenth resistor R14 and a second end of the third capacitor C3 are both connected to a second dc power supply terminal VCC 2; a collector of the second transistor Q2 is connected to a third dc power supply terminal VCC3, an emitter of the second transistor Q2 and an emitter of the third transistor Q3 are respectively interconnected to a gate of the IGBT, a first end of the fourth capacitor C4, and a first end of the seventeenth resistor R17 through the fifteenth resistor R15 and the sixteenth resistor R16, and a collector of the third transistor Q3 is connected to the second dc power supply terminal VCC 2; a second end of the fourth capacitor C4 and a second end of a seventeenth resistor R17 are respectively connected with the emitter of the IGBT; the common terminal is connected with the anode of the fourth diode D4, and the cathode of the fourth diode D4 is connected with the anode of the fifth diode D5 through the eighteenth resistor R18; the cathode of the fifth diode D5 is connected to the anode of the sixth diode D6, and the cathode of the sixth diode D6 is connected to the collector of the IGBT.
In this embodiment, the diodes D4, D5, and D6 are used to increase the reverse withstand voltage of the IGBT driving optocoupler IC 1. The IGBT driving optocoupler IC1 preferably employs an a316J type optocoupler, and the IGBT driving optocoupler IC1 further includes a phase-free signal trigger pin, which is connected to the first dc power source VCC1 via a resistor R12C to pull up the voltage of the phase-free signal trigger pin, so that the input is at a high level. The square wave signal amplifying module 42 further includes a resistor 12B, the resistor 12B is serially connected between the first dc power source VCC1 and the inverse phase signal trigger pin, when the receiving unit R2521Z is turned on and outputs a low level square wave signal, the square wave signal is serially divided by the resistors R12A and R12B and then output to the inverse phase signal trigger pin, and then is isolated by an optical coupler signal and then output to the bases of the second triode Q2 and the third triode Q3 through the driving signal output pin, so as to drive the second triode Q2 and the third triode Q3 to be turned on in turn, when the square wave signal is at a high level, the second triode Q2 is turned on, the third triode Q3 is in a cut-off state, and then the IGBT is driven to be turned on, and at this time, a high level high current pulse is output by the IGBT. When the square wave signal is at a low level, the third triode Q3 is turned on, the second triode Q2 is in a cut-off state, and the IGBT is driven to be cut off, and at this time, the IGBT outputs a high-current pulse square wave at a low level, and further outputs a high-current pulse square wave converted from a high level to a low level.
Referring to fig. 1 to 6, further, in the above embodiment, the kiloamp large current pulse signal generating device further includes an IGBT protection module 41, the IGBT driving optocoupler IC1 further includes a voltage detection pin and a fault signal output pin, the IGBT protection module 41 includes an optocoupler U1, a fourth triode Q4, a fifth triode Q5, a relay JZ, a double diode 431, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a fifth capacitor C5 and a sixth capacitor C6, the voltage detection pin is connected to the eighteenth resistor R18, and the fault signal output pin is connected to a first end of the twentieth resistor R20, a first end of the fifth capacitor C5 and a base of the fourth triode Q4 through the nineteenth resistor R19; a second terminal of the twentieth resistor R20 is interconnected with a second terminal of the fifth capacitor C5, an emitter of the fourth transistor Q4, and the first dc power source VCC 1; a collector of the fourth transistor Q4 is interconnected with a first end of the twenty-first resistor R21 and a first end of the twenty-second resistor R22; a second end of the twenty-first resistor R21 is connected to an anode of the transmitting unit T2521Z; a second end of the twenty-second resistor R22 is interconnected with an anode of the optocoupler U1, a first end of the twenty-third resistor R23 and a first end of the sixth capacitor C6, and a cathode of the optocoupler U1, a second end of the twenty-third resistor R23 and a second end of the sixth capacitor C6 are all grounded; a collector of the optocoupler U1 is interconnected with an anode of the double diode 431, a first end of the coil of the relay JZ, a collector of the fifth triode Q5 and the second direct current power supply terminal VCC2, and an emitter of the optocoupler U1 is interconnected with a first end of the twenty-fourth resistor R24 and an emitter of the fifth triode Q5; the cathode of the double diode 431 and the second end of the coil of the relay JZ are respectively connected to the third dc power supply terminal VCC 3.
When the voltage detection pin DESAT detects that the voltage between the collector and the emitter of the IGBT is larger than a preset value, the preset value is generally 7V, a signal output by the fault signal output pin jumps from a high level to a low level, so that a nineteenth resistor R19 and a twentieth resistor R20 are connected in series and divided, then a fourth triode Q4 is triggered to be switched on, a trigger optocoupler U1 is triggered to be switched on, a fifth triode Q5 is triggered to be switched on, after the fifth triode Q5 is switched on, a relay JZ is powered on to attract, after the second direct current power supply end VCC2 is short-circuited with a third direct current power supply end VCC3, the second triode Q2 and a third triode Q3 are triggered to be switched off, and the IGBT is controlled to stop working so as to avoid damage to the IGBT. Meanwhile, after the fourth triode Q4 is turned on, the transmitting unit T2521Z in the photoelectric converter is triggered to be turned off, so that the output of the square wave signal IGBT is stopped to drive the optocoupler IC1, and the IGBT can be controlled to stop working, thereby preventing the IGBT from being damaged.
In this embodiment, the driving module 40 further includes a reset circuit 42, the reset circuit 42 includes a reset switch S2, a resistor R41, R42, a diode D41, a capacitor C41, and C42, the IGBT driving optocoupler IC1 further includes a reset pin, a first end of the reset switch S2 is connected to the reset pin of the IGBT driving optocoupler IC1 through a resistor R41, a second end of the reset switch is grounded, one end of the resistor R42 is connected to the second dc power source terminal VCC2, and another end is connected to the reset pin of the IGBT driving optocoupler IC1, the capacitor C41 and the capacitor C42 are respectively and serially connected between the reset pin and the ground, when the reset switch is turned off, the resistors R41 and the R42 are serially connected to divide voltage to output a reset signal to the reset pin, so as to reset the chip of the IGBT driving optocoupler IC 1.
Referring to fig. 1 to 6, based on the above embodiment, the kiloamp large current pulse signal generating apparatus further includes a dc power module 70, the signal generating module includes that the dc power module 70 includes a first dc power conversion module 71 and a second dc power conversion module 72, the input ends of the first dc power conversion module 71 and the second dc power conversion module 72 are used for accessing an ac power, and the output ends of the first dc power conversion module 71 and the second dc power conversion module 72 are respectively connected to the power ends of the square wave signal generating module 30.
In this embodiment, the dc power module 70 is configured to convert the input ac power into a suitable dc power and output the dc power to the square wave signal generating module 30, so that the square wave signal generating module 30 can work.
The first power conversion circuit 71 includes a power input terminal Vin, a rectifier diode D61, a filter module 61, a first buck chip U61, a first filter capacitor C61, and a second filter capacitor C62, where the power input terminal is used to connect to a power supply, an anode of the rectifier diode D61 is connected to the power input terminal Vin, and a cathode of the rectifier diode D61 is connected to an input terminal of the filter module 61; a first output end of the filtering module 711 is connected to a positive input end of the first buck chip U61, and a second output end of the filtering module 711 is connected to a negative input end of the first buck chip U61; the positive output end of the first buck chip U61 is the second dc power supply terminal VCC2, and is connected to the first ends of the first filter capacitor C61 and the second filter capacitor C62, and the negative output end of the first buck chip U61 is grounded to the second ends of the first filter capacitor C61 and the second filter capacitor C62.
In this embodiment, the power supply preferably adopts a 24V dc power supply, and the filtering module 61 is configured to filter noise in the dc power supply, so as to improve the electromagnetic anti-interference capability of the kiloamp large-current pulse signal generating device itself, and prevent the kiloamp large-current pulse signal generating device from interfering with the hall sensor. The power supply voltage output by the power supply is rectified and filtered by the rectifying diode D61 and the first filter capacitor C61, and then output to the first buck chip U61, so as to convert the power supply voltage into a suitable first dc power supply, for example, convert 24V into 5V, output to the second dc power supply terminal VCC2, and output through the second dc power supply terminal VCC 2.
Referring to fig. 1 to 6, further, the kiloamp large current pulse signal generating device further includes a second power conversion circuit 72, where the second power conversion circuit 72 includes a second voltage-reducing chip U71, a third filter capacitor C63, a fourth filter capacitor C64, a fifth filter capacitor C65, a twenty-fifth resistor R25 and a zener diode Z1, a positive input end of the second voltage-reducing chip U71 is connected to the first output end of the filter module 61, and a negative input end of the second voltage-reducing chip U71 is connected to the second output end of the filter module 61; an anode output end of the second buck chip U71 is the third dc power supply terminal VCC3, and is connected to first ends of the third filter capacitor C63, the fourth filter capacitor C64, and the twenty-fifth resistor R25, and a cathode output end of the second buck chip U71 is the second dc power supply terminal VCC2, and is interconnected to the second ends of the third filter capacitor C63, the third filter capacitor C63, the first end of the fifth filter capacitor C65, and an anode of the zener diode Z1; the cathode of the zener diode Z1 and the second terminal of the fifth filter capacitor C65 are both grounded, and the second terminal of the twenty-fifth resistor R25 is connected to the ground.
In this embodiment, the power supply voltage output by the power supply is rectified and filtered by the rectifying diode D61 and the first filter capacitor C61, and then output to the second buck chip U71, so as to convert the power supply voltage into a suitable second dc power supply and a suitable third dc power supply, for example, 24V is converted into +15V and-9V, and then output to the third dc power supply terminal VCC3 and the second dc power supply terminal VCC2, and then output through the third dc power supply terminal VCC3 and the second dc power supply terminal VCC 2.
Referring to fig. 1 to 6, in a preferred embodiment, the kiloamp large-current pulse signal generating apparatus further includes a control module 80 for controlling the operation of the square wave signal generating module 30, and an output terminal of the control module 80 is connected to the controlled terminal of the square wave signal generating module 30.
In this embodiment, the control module 80 is configured to output a control signal to control the square wave signal generating module 30 to work, and in this embodiment, the control module 80 may be a control switch or a main control chip, which is not limited herein.
The invention also provides DIDT testing equipment which comprises the kiloamp high current pulse signal generating device. The detailed structure of the kiloamp large-current pulse signal generating device can refer to the above embodiments, and is not described herein again; it can be understood that, because the kiloamp large-current pulse signal generating device is used in the DIDT testing apparatus of the present invention, the embodiment of the DIDT testing apparatus of the present invention includes all technical solutions of all embodiments of the kiloamp large-current pulse signal generating device, and the achieved technical effects are also completely the same, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A kiloampere large-current pulse signal generating device is applied to DIDT (digital induced differential transformer) testing equipment and is characterized by comprising a high-voltage power supply, a high-voltage capacitor bank module, a square wave signal generating module, a driving module and an IGBT (insulated gate bipolar translator), wherein the input end of the high-voltage power supply is used for being connected with an alternating current power supply, the positive power end of the high-voltage power supply is connected with the positive input end of the high-voltage capacitor bank module, the negative power end of the high-voltage power supply is connected with the negative input end of the high-voltage capacitor bank module, and the positive output end of the high-voltage capacitor bank module is connected with the collector of the IGBT; the negative electrode output end of the high-voltage capacitor bank module 20 is connected with the emitting electrode of the IGBT; the output end of the square wave signal generating module is connected with the input end of the driving module; the output end of the driving module is connected with the gate pole of the IGBT; wherein,
the high-voltage capacitor bank module is used for storing electric energy provided by the high-voltage power supply and providing high-power constant current;
the square wave signal generating module is used for generating square wave signals;
the driving module is used for generating a driving signal when receiving the square wave signal;
and the IGBT is used for carrying out high-power switch driving according to the driving signal so as to convert the high-power electric quantity stored energy in the high-voltage capacitor bank module into rapid high-power constant current output.
2. The kiloamp high current pulse signal generating device as defined in claim 1, further comprising a capacitive load resistance module connected in series between the high voltage capacitor bank module and a collector of the IGBT.
3. The kiloamp high current pulse signal generating device as claimed in claim 1, further comprising a control module for controlling the operation of the square wave signal generating module, wherein the output terminal of the control module is connected to the controlled terminal of the square wave signal generating module.
4. The kiloamp high current pulse signal generating device as claimed in claim 1, wherein the square wave signal generating module comprises a first triode, a first switch, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a first trigger, a second trigger, a third trigger, a fourth trigger, a fifth trigger, a sixth trigger, a first capacitor, a second capacitor, a first diode, a second diode, a third diode, a first potentiometer, a second potentiometer, a third potentiometer and a photoelectric converter, and the photoelectric converter comprises a transmitting unit and a receiving unit; the first end of the first switch is connected with the first end of the first resistor, and the second end of the first switch is interconnected with the first end of the first capacitor, the first fixed contact of the first potentiometer, the moving contact and the anode of the first diode and is grounded; the second end of the first resistor is interconnected with the first end of the second resistor, the input end of the first trigger and the second end of the first capacitor; the second end of the second resistor is connected with a first direct current power supply end; the output end of the first trigger is interconnected with the first end of the third resistor, the second stationary contact of the first potentiometer and the input end of the second trigger through the second capacitor, and the second end of the third resistor is connected with the cathode of the first diode; the output end of the second trigger is interconnected with the base electrode of the first triode and the first end of the fifth resistor through the fourth resistor; a second end of the fifth resistor is grounded, a collector of the first triode is interconnected with an input end of the third trigger, a first end of the seventh resistor and a first end of the eighth resistor through the sixth resistor, and an emitter of the first triode is grounded; the output end of the third trigger is interconnected with the input ends of the fourth trigger, the fifth trigger and the sixth trigger, the anode of the second diode and the cathode of the third diode; a second end of the seventh resistor is connected with a first fixed contact of the second potentiometer; a second end of the eighth resistor is connected with a first fixed contact of the third potentiometer; a second fixed contact of the second potentiometer is interconnected with the movable contact and a cathode of the second diode; a second fixed contact of the third potentiometer is interconnected with the movable contact and an anode of the third diode; the output ends of the fourth trigger, the fifth trigger and the sixth trigger are respectively connected with the anode of the sending unit through the ninth resistor, the tenth resistor and the eleventh resistor; the cathode of the sending unit is grounded, the collector of the receiving unit is the output end of the square wave signal generating module and is connected with the first direct current power supply end, and the emitter of the receiving unit is grounded.
5. A kiloamp high current pulse signal generating device as defined in claim 1, the pulse signal amplification module comprises an IGBT driving optocoupler, a second triode, a third triode, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a fourth diode, a fifth diode, a third capacitor and a fourth capacitor, the IGBT driving optocoupler comprises an inverse signal triggering pin, a common pin and a driving signal output pin, the signal trigger pin is connected with the output end of the square wave signal generation module through the twelfth resistor, the driving signal output pin is interconnected with a first end of the thirteenth resistor and a first end of the fourteenth resistor, the second end of the thirteenth resistor is interconnected with the first end of the third capacitor, the base of the second triode and the base of the third triode; a second end of the fourteenth resistor and a second end of the third capacitor are both connected with a second direct current power supply end; a collector of the second triode is connected with a third direct current power supply end, an emitter of the second triode and an emitter of the third triode are respectively interconnected with a gate electrode of the IGBT, a first end of the fourth capacitor and a first end of the seventeenth resistor through the fifteenth resistor and the sixteenth resistor, and a collector of the third triode is connected with the second direct current power supply end; a second end of the fourth capacitor and a second end of the seventeenth resistor are respectively connected with an emitter of the IGBT; the common end is connected with the anode of the fourth diode, and the cathode of the fourth diode is connected with the anode of the fifth diode through the eighteenth resistor; the cathode of the fifth diode is connected with the anode of the sixth diode, and the cathode of the sixth diode is connected with the emitter of the IGBT.
6. The kiloamp high current pulse signal generating device as claimed in claim 1, wherein the kiloamp high current pulse signal generating device further comprises an IGBT protection module, the driver IC further comprises a voltage detection pin and a fault signal output pin, the IGBT protection module comprises an optocoupler, a fourth triode, a fifth triode, a relay, a double diode, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a fifth capacitor and a sixth capacitor, the voltage detection pin is connected with the eighteenth resistor, and the fault signal output pin is connected with a first end of the twentieth resistor, a first end of the fifth capacitor and a base of the fourth triode via the nineteenth resistor; a second end of the twentieth resistor is interconnected with a second end of the fifth capacitor, an emitter of the fourth triode and the first direct-current power supply end; a collector of the fourth triode is interconnected with a first end of the twenty-first resistor and a first end of the twenty-second resistor; a second end of the twenty-first resistor is connected with an anode of the sending unit; a second end of the twenty-second resistor is interconnected with an anode of the optocoupler, a first end of the twenty-third resistor and a first end of the sixth capacitor, and a cathode of the optocoupler, a second end of the twenty-third resistor and a second end of the sixth capacitor are all grounded; a collector of the optocoupler is interconnected with an anode of the double diode, the first end of the relay coil, a collector of the fifth triode and the second direct current power supply end, and an emitter of the optocoupler is interconnected with a first end of the twenty-fourth resistor and an emitter of the fifth triode; and the cathode of the double diode and the second end of the relay coil are respectively connected with the third direct current power supply end.
7. The kiloamp high-current pulse signal generating device as claimed in claim 6, wherein the kiloamp high-current pulse signal generating device further comprises a dc power supply module, the signal generating module comprises the dc power supply module including a first power conversion module and a second dc power conversion module, input ends of the first dc power conversion module and the second dc power conversion module are used for accessing an ac power supply, and output ends of the first dc power conversion module and the second dc power conversion module are respectively connected with power ends of the square wave signal generating module.
8. The kiloamp high current pulse signal generating device as claimed in claim 7, wherein the first power conversion module comprises a power input terminal, a rectifier diode, a filter module, a first buck chip, a first filter capacitor and a second filter capacitor, the power input terminal is configured to be connected to a power supply, an anode of the rectifier diode is connected to the power input terminal, and a cathode of the rectifier diode is connected to the input terminal of the filter module; a first output end of the filtering module is connected with a positive input end of the first voltage reduction chip, and a second output end of the filtering module is connected with a negative input end of the first voltage reduction chip; the positive output end of the first voltage reduction chip is the first direct current power supply end and is connected with the first ends of the first filter capacitor and the second filter capacitor, and the negative output end of the first voltage reduction chip is grounded with the second ends of the first filter capacitor and the second filter capacitor.
9. The kiloamp high-current pulse signal generating device according to claim 8, wherein the second power conversion circuit comprises a second buck chip, a third filter capacitor, a fourth filter capacitor, a fifth filter capacitor, a twenty-fifth resistor and a zener diode, a positive input end of the second buck chip is connected to the first output end of the filter module, and a negative input end of the second buck chip is connected to the second output end of the filter module; the positive output end of the second buck chip is the third direct-current power supply end and is connected with the third filter capacitor, the fourth filter capacitor and the first end of the twenty-fifth resistor, and the negative output end of the second buck chip is the second direct-current power supply end and is interconnected with the third filter capacitor, the second end of the third filter capacitor, the first end of the fifth filter capacitor and the anode of the voltage stabilizing diode; and the cathode of the voltage stabilizing diode and the second end of the fifth filter capacitor are grounded, and the second end of the twenty-fifth resistor is grounded.
10. A DIDT test apparatus, characterized in that it comprises a kiloamp high current pulse signal generating device as claimed in any one of claims 1 to 9.
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| CN113612373B (en) * | 2021-07-30 | 2023-02-17 | 中车大连电力牵引研发中心有限公司 | Simple pulse complementary PWM generating circuit and method |
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