CN102185591A - Gate pulse generation device for testing power device of current transformation module - Google Patents
Gate pulse generation device for testing power device of current transformation module Download PDFInfo
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Abstract
The invention discloses a specific implementing way of a gate pulse generation device for testing a power device of a current transformation module. The gate pulse generation device comprises circuits and modules such as a power input circuit, a pulse resetting circuit, a pulse starting circuit, a pulse formation circuit, a pulse width modulation circuit, a first gate pulse output circuit, a second gate pulse output circuit and the like, wherein the pulse starting circuit triggers the gate pulse generation device; the pulse formation circuit generates a group of dipulse gate pulse signals; the pulse width modulation circuit performs the modulation of pulse width and delay between two gate pulses on the dipulse gate pulse signals; the first gate pulse output circuit converts the double pulses into two groups of reversed DC 5V dipulse voltage waveforms; and the second gate pulse output circuit performs pull-up processing on DC 5V dipulse gate triggering signals, and outputs DC 15V dipulse gate triggering signals. By the technical scheme provided by the invention, the testing quality and efficiency are improved, equipment investment is saved, and the universality of the device is enhanced.
Description
Technical field
The present invention relates to a kind of pulse generating unit, especially relate to a kind of unsteady flow modular power device IGBT(Insulated Gate Bipolar Transistor, insulated gate bipolar transistor of being applied to) the gate pulse generating means of switch performance validation test.
Background technology
Along with the develop rapidly of Chinese Semiconductor Converting Technology, the variable-frequency variable-voltage technology relies on the powerful technical advantage of himself, and the popularity rate of using in industrial transmission market is more and more higher.And on the market at current transformer core component unsteady flow module dispatch from the factory the examination test macro the mode of building also of all kinds, what have does not even carry out the independent checking of dispatching from the factory to the switch performance of unsteady flow modular power device IGBT, the inefficacy of unsteady flow module even the probability of blast improved (so not only improved product quality hidden danger, also improved supplier's manufacturing and after cost virtually greatly) greatly when this also just caused current transformer to dispatch from the factory power examination or The field.Tracing sth. to its source, is owing to controllability, the reliability and stability requirement of the gate pulse signal of unsteady flow modular power device IGBT switch performance checking are very high greatly.
Before being installed or dispatch from the factory separately, the unsteady flow module must verify and the examination of suitable power that to guarantee the outgoing of unsteady flow module, its switch performance test macro as shown in Figure 1 to the switch performance of unsteady flow modular power device IGBT.Be the switch performance of power device IGBT in the checking unsteady flow module, needing provides the control wave of two different pulse durations (pulsewidth is adjustable) to pipe on the same brachium pontis (pipe down) gate pole of IGBT respectively.As shown in Figure 2, the first half is a gate pulse generating means output switch control impuls waveform, the latter half be power device IGBT conducting and by the time voltage and current waveform between C, E.Go up pipe (pipe down) the C utmost point of power device IGBT and the size of E electrode current when the magnitude of voltage of the C utmost point and E interpolar VDM and second pulse are opened when measuring and writing down pipe (pipe down) second pulse-off of power device IGBT simultaneously.
Present homemade unsteady flow product just develops rapidly, and corresponding output is also increasing, because the test of unsteady flow modular power device IGBT switch performance checking is had relatively high expectations to test macro stability and measuring accuracy.The gate pulse generation systems of the general unsteady flow modular power device IGBT switch performance of present domestic industry checking mainly exists power output shakiness, output gate pole pulse voltage wave shape edge time grow (waveform rising edge and trailing edge are precipitous inadequately), be subject to outer signals disturbs and causes the controllability of stable output signal deficiency, gate pulse signal strong and cost is expensive, overhaul defectives such as complexity and breakdown maintenance cost height; This has also just caused the test speed of product quite slow, testing efficiency is not high, in follow-up production in enormous quantities, can't meet speed soon, requirement cheaply, may to cause testing accuracy rate high and bring hidden danger to product quality owing to the test macro reason yet.
The gate pulse generation systems of a lot of unsteady flow modular power device IGBT switch performances checkings all is to adopt directly to use control of product case to produce the digital circuit that gate pole pulse signal or software and hardware combine to produce in the present domestic unsteady flow industry, or adds the mode that power amplifier combines by the normal signal generator and produce.The defective of preceding dual mode is that versatility is poor (if the pulsewidth or the output voltage amplitude of gate pole pulse signal are adjusted, operate with regard to more complicated: the needs that have are revised hardware, the needs that have are revised software, and the needs that also have are revised software and hardware simultaneously), complicated, the breakdown maintenance cost height of maintenance; The remarkable defective of the third mode is with high costs, the big poor stability of system, complicated operation, in case and the breakdown maintenance cost also very high.
Mainly there is following defective in the gate pulse generation systems of general unsteady flow modular power device IGBT switch performance checking in the industry at present:
(1) power output instability: therefore cause turning on and off of power device IGBT unreliable sometimes, performance is particularly serious when particularly carrying out the examination of great power conversion circuit module.
(2) output gate pole pulse voltage wave shape edge overlong time (waveform rising edge and trailing edge are precipitous inadequately): cause the loss that turns on and off of power device IGBT to increase, also will cause the dynamic characteristic that turns on and off of power device IGBT not reach required examination operational environment requirement simultaneously; Therefore certainly will have a direct impact (when particularly carrying out the examination of high-voltage variable flow module) to the opening of power device IGBT, cut-off current and voltage swing, cause can not get accurately test data and bring serious hidden danger to product quality.
(3) being subject to outer signals disturbs and causes the stable output signal deficiency: if jitter will directly change static state and the dynamic duty environment of power device IGBT, also certainly will have a direct impact (when particularly carrying out the examination of great power conversion circuit module), cause can not get accurately test data and bring serious hidden danger to product quality to the opening of power device IGBT, cut-off current and voltage swing.
(4) the complicated and breakdown maintenance cost height of maintenance: the gate pulse generation systems of the unsteady flow modular power device IGBT switch performance checking of industry digital circuit structure is the control mode that integrated circuit, software and hardware combine owing to what adopt, also just its maintenance and breakdown maintenance cost are had higher requirement simultaneously, even its maintenance cost loses more than gain.
(5) controllability of gate pulse signal is not strong: what have can only produce fixedly gate pole pulse signal, if the pulsewidth or the output voltage amplitude of signal are adjusted, operating, (needs that have are revised hardware with regard to more complicated, the needs that have are revised software, the needs that also have are revised software and hardware simultaneously), this has also just reduced the versatility of gate pulse generation systems to a great extent.
Summary of the invention
The purpose of this invention is to provide a kind of versatility height, signal stabilization, high-precision unsteady flow modular power device IGBT switch performance validation test gate pulse generating means, can improve test mass well, promote testing efficiency, save the equipment input cost, the versatility of intensifier effectively reduces operator's the gate threshold of going into.
The present invention specifically provides the execution mode of a kind of unsteady flow modular power device detection with the gate pulse generating means, a kind of unsteady flow modular power device detection gate pulse generating means, comprise power supply input circuit, the pulse reset circuit, pulse starting circuit, pulse shaping circuit, pulse width modulation circuit, gate pulse output circuit one, gate pulse output circuit two, IGBT working state signal feedback control circuit, power supply input circuit and pulse shaping circuit connect, DC5V and DC15V to the external power source input carry out filtering and protection processing, and the DC5V power supply is powered to the logic chip in the gate pole pulse generating unit and produced the DC5V control signal, and the DC15V power supply is DC15V pulse output with drawing on the DC5V gate pulse; The pulse reset circuit links to each other with pulse shaping circuit, the gate pole pulse generating unit is carried out zero clearing reset, and carry out the operation preparation of next step test; Pulse starting circuit links to each other with pulse shaping circuit, and the gate pole pulse generating unit is triggered, and makes the gate pulse generating means produce the suitable dipulse gate pulse signal of a combination; Pulse shaping circuit produces one group of high-low level signal, exports one group of stable DC5V dipulse signal of telecommunication PLUS after treatment; Pulse width modulation circuit links to each other with pulse shaping circuit, and the time-delay that the dipulse gate pulse signal of paired pulses formation circuit output carries out between pulse duration and two gate pulses is regulated;
Gate pulse output circuit one links to each other with pulse shaping circuit, and the dipulse that pulse shaping circuit is produced is transformed into two groups of reverse each other DC5V dipulse gate pole triggering signals; Gate pulse output circuit two links to each other with gate pulse output circuit one, draws processing on two groups of reverse each other DC5V dipulse gate pole triggering signals are carried out respectively, and exports two groups of stable reverse each other DC15V dipulse gate pole triggering signals; IGBT working state signal feedback control circuit links to each other with pulse shaping circuit, monitors the working state signal of tested IGBT module, when tested IGBT module occurs when unusual, produces the locking pulse signal.
As a kind of unsteady flow modular power of the present invention device detection further execution mode of gate pulse generating means, the gate pulse generating means comprises that also operating state detects and indicating circuit, operating state detection and indicating circuit link to each other with pulse shaping circuit, and the operating state of gate pole pulse generating unit and working index are shown and monitor.
As a kind of unsteady flow modular power of the present invention device detection further execution mode of gate pulse generating means, the size of dipulse gate pulse signal amplitude is adjusted by the size of regulating DC15V power input voltage amplitude in the power supply input circuit.
As a kind of unsteady flow modular power of the present invention device detection further execution mode of gate pulse generating means, the gate pulse generating means comprises the pulse enable signal output apparatus, the effect of pulse enable signal output apparatus is to provide a controlled DC 5V or the work of DC 15V high level to allow signal to the unsteady flow module, inform that unsteady flow module drive plate can begin to receive the gate pole start pulse signal, otherwise unsteady flow module drive plate will forbid receiving the gate pole start pulse signal.Unsteady flow module drive plate is the part in the whole unsteady flow module, and unsteady flow module drive plate links to each other with the gate pulse generating means with unsteady flow modular power device detection of the present invention.
As a kind of unsteady flow modular power of the present invention device detection further execution mode of gate pulse generating means, the gate pulse generating means comprises the DC15V output circuit, the DC15V output circuit links to each other with power supply input circuit by pulse shaping circuit, its role is to provides DC15V operating voltage signal after the controlled RC Filtering Processing to unsteady flow module drive plate, makes unsteady flow module drive plate be established by cable beginning work.
As a kind of unsteady flow modular power of the present invention device detection further execution mode of gate pulse generating means, it is by holding a pulse signal manually for the CLK of d type flip flop IC3 that the gate pulse of pulse shaping circuit forms, produce a low pulse signal by this d type flip flop and give two monostable flipflop IC4 that can heavily trigger, produce the high-low level signal of two 5V then by monostable flipflop IC4, generation is stablized for one group after carrying out logical process by OR circuit IC6 in the impulse output circuit and 7 pairs of high-low level signals of inverter ic again, and the precipitous DC5V dipulse voltage waveform PLUS in edge.
As a kind of unsteady flow modular power of the present invention device detection further execution mode of gate pulse generating means, gate pulse output circuit two draws processing on by triode V1 and triode V3 DC5V gate pulse signal being carried out, be enlarged into the gate pulse signal of DC15V, realize the isolation and the amplification of signal.
As a kind of unsteady flow modular power of the present invention device detection further execution mode of gate pulse generating means, pulse width modulation circuit is by adjusting the pulsewidth time T 1 that potentiometer VR1 regulates first pulse, regulate two pulse distance time T 2 by adjusting potentiometer VR2, by adjusting the pulsewidth time T 3 that potentiometer VR3 regulates second pulse.
As a kind of unsteady flow modular power of the present invention device detection further execution mode of gate pulse generating means, the pulse reset circuit comprises electrify restoration circuit and manual reset circuit, the zero clearing that powers on resets electrify restoration circuit to d type flip flop IC3 and monostable flipflop IC4, the manual reset electro route manually produces a low level signal and carries out the zero clearing reset processing for d type flip flop IC3, and carries out the generation preparation of battery of tests gate pole start pulse signal down.
As a kind of unsteady flow modular power of the present invention device detection further execution mode of gate pulse generating means, when tested IGBT module occurs when unusual, send the FOU signal by the unsteady flow module and carry out sending into d type flip flop IC3 after logic isolation is handled through inverter ic 7 and produce the generation that a high level signal comes the locking pulse signal, cross-over connection cover JP1 is set, and to be used for adapting to unsteady flow module abnormal signal be high level or the low level difference needs when being provided with.
By implementing the described a kind of unsteady flow modular power device detection gate pulse generating means of the specific embodiment of the invention, on the basis of the gate pulse generating means shortcoming of verifying at traditional unsteady flow modular power device IGBT switch performance, improve test mass, promoted testing efficiency, saved the cost that equipment drops into, strengthen the versatility of device, reduced operator's the gate threshold of going into effectively.Simultaneously, because circuit constitutes simplicity of design, can well simplify maintenance step and reduce the breakdown maintenance cost, recoverability price ratio height has been guaranteed the stability in the application process.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the switch performance test macro sketch of prior art unsteady flow modular power device IGBT;
Fig. 2 is the control signal waveform of prior art test macro and each measurement point voltage, current waveform schematic diagram;
Fig. 3 is the systematic functional structrue block diagram of a kind of unsteady flow modular power of the present invention device detection with the gate pulse generating means;
Fig. 4 is the power supply input circuit schematic diagram of a kind of unsteady flow modular power of the present invention device detection with the gate pulse generating means;
Fig. 5 is the electrify restoration circuit schematic diagram of a kind of unsteady flow modular power of the present invention device detection with the gate pulse generating means;
Fig. 6 is the manual reset circuit schematic diagram of a kind of unsteady flow modular power of the present invention device detection with the gate pulse generating means;
Fig. 7 is the pulse starting circuit schematic diagram of a kind of unsteady flow modular power of the present invention device detection with the gate pulse generating means;
Fig. 8 is the pulse shaping circuit schematic diagram of a kind of unsteady flow modular power of the present invention device detection with the gate pulse generating means;
Fig. 9 is the DC5V impulse output circuit schematic diagram of a kind of unsteady flow modular power of the present invention device detection with the gate pulse generating means;
Figure 10 is a kind of unsteady flow modular power of the present invention device detection gate pulse generating means DC5V dipulse voltage waveform view;
Figure 11 is a kind of unsteady flow modular power of the present invention device detection gate pulse generating means DC15V dipulse voltage waveform view;
Figure 12 is the DC15V impulse output circuit schematic diagram of a kind of unsteady flow modular power of the present invention device detection with the gate pulse generating means;
Figure 13 is the IGBT unsteady flow module abnormal signal feedback circuit schematic diagram of a kind of unsteady flow modular power of the present invention device detection with the gate pulse generating means.
Wherein: 1-power model, 2-oscilloscope, 3-universal instrument, the 4-current probe, 5-inductance, 6-gate pulse generating means, the 7-driver module, the 8-high voltage source, 9-electric capacity, 10-low-tension supply, the 11-power supply input circuit, 12-pulse reset circuit, 13-pulse starting circuit, 14-pulse shaping circuit, the 15-pulse width modulation circuit, 16-gate pulse output circuit one, 17-gate pulse output circuit two, 18-IGBT working state signal feedback control circuit, the 19-operating state detects and indicating circuit, 20-pulse enable signal output apparatus, 21-DC15V output circuit, IGBT1, the IGBT2-IGBT device.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
As the embodiment of a kind of unsteady flow modular power of the present invention device detection with the gate pulse generating means, be two required distinct pulse widths pulse control signals in the switch performance test process that produces power device IGBT in the checking unsteady flow module, unsteady flow modular power device detection as shown in Figure 3 comprises with the gate pulse generating means: power supply input circuit 11, pulse reset circuit 12, pulse starting circuit 13, pulse shaping circuit 14, pulse width modulation circuit 15, gate pulse output circuit one (DC5V impulse output circuit) 16, gate pulse output circuit two (DC15V impulse output circuit) 17(pulse pull-up circuit), IGBT working state signal feedback control circuit 18, operating state detects and indicating circuit 19(IGBT fault-signal, compositions such as pulse signal state).
Each parallel circuit modular structure function introduction is as follows:
Power supply input circuit 11: mainly DC5V and the DC15V to the external power source input carries out filtering and protection processing, and DC5V mainly powers to each logic chip in the unsteady flow modular power device detection gate pulse generating means and produces various DC5V control signals; The DC15V power supply mainly is to be used for being DC15V pulse output with drawing on the DC5V gate pulse.
Pulse reset circuit 12: produce suitable low level signal and unsteady flow modular power device detection gate pulse generating means is carried out zero clearing reset, and carry out next step test operation and prepare.
Pulse starting circuit 13: produce a suitable low level signal unsteady flow modular power device detection gate pulse generating means is triggered, make the gate pulse generating means produce the suitable dipulse gate pulse signal of a combination.
Pulse shaping circuit 14: by the mutual triggering of gate pulse generating means internal logic circuit, and produce the suitable high-low level signal of a combination, then through one group of stable DC5V dipulse gate pulse signal of output after some logical process.
Pulse width modulation circuit 15: respectively pulsewidth T1, T3 and pulse delay T2 are carried out size adjustment control by the capacitance-resistance coefficient that changes circuit.
DC5V impulse output circuit 16: the dipulse that pulse shaping circuit 14 is produced is transformed into two groups of reverse each other DC5V dipulse gate pole triggering signals.
DC15V impulse output circuit 17: draw processing on two groups of reverse each other DC5V dipulse gate pulse signals are carried out respectively, and export two groups of stable reverse DC15V dipulse gate pole triggering signals each other.This signal also can be adjusted the size of dipulse gate pole triggering signal output voltage amplitude by changing DC15V power input voltage amplitude size.
IGBT working state signal feedback control circuit 18: this partial circuit mainly comprises control and the protection of each unusual operating state of unsteady flow modular power device IGBT of enabling to unsteady flow modular power device IGBT.
Operating state detects and indicating circuit 19: this partial circuit mainly be play ergonomic visual, and be convenient to unusual maintenance and troubleshooting, every operating state of unsteady flow modular power device detection gate pulse generating means and working index are shown and monitor.
Pulse enable signal output apparatus 20: this partial circuit mainly is to play to the unsteady flow module to provide a controlled DC 5V or the work of DC 15V high level to allow signal, inform that unsteady flow module drive plate can begin to receive the gate pole start pulse signal, otherwise unsteady flow module drive plate will forbid receiving the gate pole start pulse signal.Unsteady flow module drive plate is the part in the whole unsteady flow module, and unsteady flow module drive plate links to each other with the gate pulse generating means with unsteady flow modular power device detection of the present invention.
DC15V output circuit 21: this partial circuit mainly is to play DC15V operating voltage signal after the one controlled RC Filtering Processing to unsteady flow module drive plate is provided, and makes unsteady flow module drive plate be established by cable beginning work.
26S Proteasome Structure and Function to each part of system is described in detail as follows below:
(1) power supply input circuit 11: mainly DC5V and the DC15V to the external power source input carries out filtering and protection processing; and the peak voltage when power supply turned on and off absorbs and mild the processing, is subjected to electrical component not by abnormal electrical signal impairment (circuit structure sees for details shown in Figure 4) with protection.The DC5V power supply is mainly powered to each logic chip in the gate pole pulse generating unit and is produced various DC5V control signals; And the DC15V power supply mainly is to be used for being DC15V pulse output with drawing on the DC5V gate pulse.
(2) the pulse reset circuit 12: produce suitable low level signal and the gate pole pulse generating unit is carried out zero clearing reset, and carry out next step test operation and prepare.The pulse reset circuit is made up of electrification reset and hand-reset two parts.
Electrify restoration circuit: mainly be to the zero clearing reset (circuit structure sees for details shown in Figure 5) that powers on of d type flip flop (74LS74) and monostable flipflop (74LS123).
Manual reset circuit: manually produce a suitable low level signal and carry out the zero clearing reset processing for d type flip flop (74LS74), and carry out the generation preparation (circuit structure sees for details shown in Figure 6) of battery of tests gate pole start pulse signal down.
(3) pulse starting circuit 13: manually produce a suitable low level signal and give d type flip flop (74LS74), (74LS74) triggers to d type flip flop, makes the gate pulse generating means produce one group of desirable dipulse gate pulse signal (circuit structure sees for details shown in Figure 7).
(4) pulse shaping circuit 14: this pulse shaping circuit is by manually giving d type flip flop IC3(74LS74) CLK hold a pulse signal, produce a low pulse signal by this d type flip flop (74LS74) and give two monostable flipflop IC4(74LS123 that can heavily trigger), produce the high-low level signal of two 5V then by monostable flipflop (74LS123), again by OR circuit IC6(74LS32 in the impulse output circuit), inverter ic 7(74HC04) etc. to the high-low level signal carry out producing after some logical process one group stable, and the DC5V dipulse voltage waveform PLUS of edge precipitous (waveform rising edge and trailing edge time are short).
(5) pulse width modulation circuit 15: the basic functional principle of this pulse width modulation circuit is to utilize the function that time-delay characteristics detect charging/discharging voltage that discharges and recharges of resistance, electric capacity, realize timing or time-delay, only need to change flexibly the size (this circuit is mainly by changing resistance sizes) of circuit capacitance-resistance value in the actual use, just can obtain timing or delay pulse output in the certain hour scope according to the actual tests demand.From this principle, this pulse shaping circuit also has the function of single pulsewidth size adjustment (T1, T3) and pulse delay size adjustment (T2):
Adjust potentiometer VR1, the pulsewidth time T 1 of first pulse will be followed adjusting;
Adjust potentiometer VR2, two pulse distance time T 2 will be followed adjusting;
Adjust potentiometer VR3, the pulsewidth time T 3 of second pulse will be followed adjusting.
(6) the DC5V impulse output circuit 16: paired pulses forms one group of DC5V dipulse voltage waveform (PLUS) signal of circuit generation and handles, and exports two groups of reverse each other DC5V dipulse gate pole triggering signals (waveform sees for details shown in Figure 10).
(7) the DC15V impulse output circuit 17: draw processing on two groups of reverse each other DC5V dipulse gate pole triggering signals are carried out respectively, and export two groups of stable DC15V dipulse gate pole triggering signals (waveform sees for details shown in Figure 11).
In order to satisfy the needs of different voltage magnitude grade IGBT power device gate pole start pulse signals, this impulse output circuit also can be adjusted the size of dipulse gate pulse signal voltage amplitude by the size that changes the DC15V power input voltage, as long as select the suitable triode V1 of performance, V3, add rational periphery circuit design, just can accomplish that how high import dc voltage has, export dipulse gate pulse voltage of signals amplitude many high (and gate pulse waveform parameters index also can reach test examination requirement) just arranged, to reach the function expansion, improve the versatility (particular circuit configurations sees for details shown in Figure 12) of this device.
Draw processing on by devices such as triode V1, V3 DC5V gate pulse signal being carried out, be enlarged into the gate pulse signal of DC15V, working signal and the isolation and the amplification that form signal have been realized, improved the interference free performance of DC15V working pulse signal, guarantee device can high voltage drive output (can accomplish that how high DC15V voltage input end input dc voltage have, how high output dipulse gate pulse voltage of signals amplitude just have, to reach the function expansion, improved the versatility of this device).
(8) IGBT working state signal feedback control circuit 18:, send the FOU signal through inverter ic 7(74HC04) carry out sending into d type flip flop IC3(74LS74 after logic isolation is handled by the unsteady flow module when tested IGBT module occurs when unusual) produce the generation that a high level signal comes the locking pulse signal.Simultaneously, the effect of cross-over connection cover JP1 is that to be used for adapting to unsteady flow module abnormal signal be high level or the low level difference needs when being provided with, in order to realize the versatility (particular circuit configurations sees for details shown in Figure 13) of abnormity protection function.
(9) the device operating state detects and indicating circuit 19: this partial circuit mainly is to play ergonomic visually, and is convenient to unusual maintenance and troubleshooting, and every operating state of gate pole pulse generating unit and working index are shown and monitor.
(10) the pulse enable signal output apparatus 20: this partial circuit mainly is to play to the unsteady flow module to provide a controlled DC 5V or the work of DC 15V high level to allow signal, inform that unsteady flow module drive plate can begin to receive the gate pole start pulse signal, otherwise unsteady flow module drive plate will forbid receiving the gate pole start pulse signal.This circuit can be integrated in the inside of pulse shaping circuit 14, also can be provided with separately.
(11) the DC15V output circuit 21: this partial circuit mainly is to play DC15V operating voltage signal after the one controlled RC Filtering Processing to unsteady flow module drive plate is provided, and makes unsteady flow module drive plate be established by cable beginning work.
The described unsteady flow modular power of specific embodiment of the invention device detection gate pulse generating means possesses versatility height, signal stabilization, high-precision advantage.Because circuit design simple (analog circuit formation), highly versatile (can be adjusted spacing T2 between two pulse pulsewidth T1, T3 and two pulses respectively by regulating 3 same slide rheostats; Simultaneously, also can adjust the size of voltage pulse output amplitude) by changing the control voltage magnitude; Simultaneously, owing to adopt analog circuit to constitute, can well reduce cost of manufacture (cost of manufacture of core veneer is probably about 300 yuan), simplify maintenance step and reduce the breakdown maintenance cost, recoverability price ratio height has been guaranteed the stability in the actual application.
The power device test that the present invention also can be used for other system and other power grades takes place with gate pulse, and the technical scheme that therefore changes the central various voltage parameter grades of the specific embodiment of the invention also is a scope of protection of the invention.Simultaneously, apparatus of the present invention also can be used for the test of central other the similar power devices of unsteady flow module.Various digital logic chips in the middle of the specific embodiment of the invention also can use other functional circuits of similar functions to substitute.The mode of these distortion all should be considered as protection scope of the present invention.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. unsteady flow modular power device detection gate pulse generating means, it is characterized in that: comprise power supply input circuit (11), pulse reset circuit (12), pulse starting circuit (13), pulse shaping circuit (14), pulse width modulation circuit (15), gate pulse output circuit one (16), gate pulse output circuit two (17), IGBT working state signal feedback control circuit (18), power supply input circuit (11) links to each other with pulse shaping circuit (14), DC5V and DC15V to the external power source input carry out filtering and protection processing, the DC5V power supply is used for the logic chip of gate pole pulse generating unit is powered and produced the DC5V control signal, and it is DC15V pulse output that the DC15V power supply is used for drawing on the DC5V gate pulse; Pulse reset circuit (12) links to each other with pulse shaping circuit (14), the gate pole pulse generating unit is carried out zero clearing reset, and carry out the operation preparation of next step test; Pulse starting circuit (13) links to each other with pulse shaping circuit (14), and the gate pole pulse generating unit is triggered, and makes the gate pulse generating means produce the suitable dipulse gate pulse signal of a combination;
Pulse shaping circuit (14) produces one group of high-low level signal, through handling one group of stable dipulse gate pulse signal of output; Pulse width modulation circuit (15) links to each other with pulse shaping circuit (14), and the time-delay that the dipulse gate pulse signal of paired pulses formation circuit (14) output carries out between pulse duration and two gate pulses is regulated; Gate pulse output circuit one (16) links to each other with pulse shaping circuit (14), and the dipulse that pulse shaping circuit (14) is produced is transformed into two groups of reverse each other DC5V dipulse gate pole triggering signals;
Gate pulse output circuit two (17) links to each other with gate pulse output circuit one (16), draw processing on two groups of reverse each other DC5V dipulse gate pole triggering signals are carried out respectively, and export two groups of stable reverse each other DC15V dipulse gate pole triggering signals; IGBT working state signal feedback control circuit (18) links to each other with pulse shaping circuit (14), monitors the working state signal of tested IGBT module, when tested IGBT module occurs when unusual, produces the locking pulse signal.
2. a kind of unsteady flow modular power device detection gate pulse generating means according to claim 1, it is characterized in that: described gate pulse generating means comprises that operating state detects and indicating circuit (19), operating state detects and indicating circuit (19) links to each other with pulse shaping circuit (14), and the operating state of gate pole pulse generating unit and working index are shown and monitor.
3. a kind of unsteady flow modular power device detection gate pulse generating means according to claim 1 and 2 is characterized in that: the size of the dipulse gate pulse signal amplitude of described gate pulse output circuit two (17) outputs is adjusted by the size of regulating DC15V power input voltage amplitude in the power supply input circuit (11).
4. a kind of unsteady flow modular power device detection gate pulse generating means according to claim 3, it is characterized in that: described gate pulse generating means comprises pulse enable signal output apparatus (20), pulse enable signal output apparatus (20) is used for providing a controlled DC 5V or the work of DC 15V high level to allow signal to unsteady flow module drive plate, inform that unsteady flow module drive plate can begin to receive the gate pole start pulse signal, otherwise the unsteady flow module will forbid receiving the gate pole start pulse signal.
5. a kind of unsteady flow modular power device detection gate pulse generating means according to claim 4, it is characterized in that: described gate pulse generating means comprises DC15V output circuit (21), DC15V output circuit (21) links to each other with power supply input circuit (11) by pulse shaping circuit (14), be used for providing DC15V operating voltage signal after the controlled RC Filtering Processing, make unsteady flow module drive plate be established by cable beginning work to unsteady flow module drive plate.
6. according to claim 1,2,4, the described a kind of unsteady flow modular power device detection gate pulse generating means of arbitrary claim in 5, it is characterized in that: it is by holding a pulse signal manually for the CLK of d type flip flop (IC3) that the gate pulse of described pulse shaping circuit (14) forms, produce a low pulse signal by this d type flip flop and give two monostable flipflops (IC4) that can heavily trigger, produce the high-low level signal of two 5V then by monostable flipflop (IC4), generation is stablized for one group after by OR circuit in the impulse output circuit (IC6) and inverter (IC7) the high-low level signal being carried out logical process again, and the precipitous DC5V dipulse voltage waveform (PLUS) in edge.
7. a kind of unsteady flow modular power device detection gate pulse generating means according to claim 6, it is characterized in that: described gate pulse output circuit two (17) draws processing on by triode V1 and triode V3 DC5V gate pulse signal being carried out, be enlarged into the gate pulse signal of DC15V, realize the isolation and the amplification of signal.
8. a kind of unsteady flow modular power device detection gate pulse generating means according to claim 7, it is characterized in that: described pulse width modulation circuit (15) is by adjusting the pulsewidth time T 1 that potentiometer VR1 regulates first pulse, regulate two pulse distance time T 2 by adjusting potentiometer VR2, by adjusting the pulsewidth time T 3 that potentiometer VR3 regulates second pulse.
9. a kind of unsteady flow modular power device detection gate pulse generating means according to claim 8, it is characterized in that: described pulse reset circuit (12) comprises electrify restoration circuit and manual reset circuit, the zero clearing that powers on resets electrify restoration circuit to d type flip flop (IC3) and monostable flipflop (IC4), the manual reset electro route manually produces a low level signal and carries out the zero clearing reset processing for d type flip flop (IC3), and carries out the generation preparation of battery of tests gate pole start pulse signal down.
10. a kind of unsteady flow modular power device detection gate pulse generating means according to claim 9, it is characterized in that: when tested IGBT module occurs when unusual, send (FOU) signal by the unsteady flow module and carry out sending into after logic isolation is handled d type flip flop (IC3) through inverter (IC7) and produce the generation that a high level signal comes the locking pulse signal, cross-over connection cover (JP1) is set, and to be used for adapting to unsteady flow module abnormal signal be high level or the low level difference needs when being provided with.
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| CN102879726A (en) * | 2012-10-29 | 2013-01-16 | 湖南南车时代电动汽车股份有限公司 | Insulated gate bipolar translator (IGBT) module performance detection device and method |
| CN103105554A (en) * | 2013-01-29 | 2013-05-15 | 上海电气集团股份有限公司 | Test circuit and method of two-electrical-level converter switching performance based on double pulses |
| CN110311658A (en) * | 2018-03-20 | 2019-10-08 | 山东朗进科技股份有限公司 | A kind of pulse generating circuit |
| CN111665391A (en) * | 2019-03-08 | 2020-09-15 | 杭州海康威视数字技术股份有限公司 | Power class detection device |
| CN112595947A (en) * | 2019-09-17 | 2021-04-02 | 株洲中车时代电气股份有限公司 | Double-pulse test method and device for converter module |
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| CN112816804A (en) * | 2019-11-15 | 2021-05-18 | 中车株洲电力机车研究所有限公司 | High-integration pulse testing device |
| CN112816804B (en) * | 2019-11-15 | 2024-04-26 | 中车株洲电力机车研究所有限公司 | Pulse testing device with high integration level |
| CN116566362A (en) * | 2023-07-11 | 2023-08-08 | 西安图为电气技术有限公司 | Double pulse generating circuit and double pulse generating method |
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Application publication date: 20110914 |