CN212908987U - Short-circuit protection circuit of three-phase inversion module - Google Patents
Short-circuit protection circuit of three-phase inversion module Download PDFInfo
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- CN212908987U CN212908987U CN202021880292.XU CN202021880292U CN212908987U CN 212908987 U CN212908987 U CN 212908987U CN 202021880292 U CN202021880292 U CN 202021880292U CN 212908987 U CN212908987 U CN 212908987U
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Abstract
The utility model discloses a short-circuit protection circuit of three-phase contravariant module, include: the circuit comprises first to seventeenth diodes, first to twenty third resistors, first to fifth capacitors, an isolation optocoupler and a comparator chip, wherein the model of the comparator chip is LM239DG, the second diode, the third diode, the fifth diode, the sixth diode, the eighth diode, the ninth diode, the twelfth diode and the twelfth diode are Schottky diodes, and the thirteenth diode, the fourteenth diode, the fifteenth diode, the sixteenth diode and the seventeenth diode are voltage stabilizing diodes. The utility model discloses a can play the effect of quick protection when three-phase contravariant output short circuit, the electronic components of whole circuit is less in this scheme, has reduced the degree of difficulty and the cost of device overall arrangement, is favorable to solving current circuit relatively complicated, the cost is higher, the big scheduling problem of the circuit layout degree of difficulty.
Description
Technical Field
The utility model relates to a converter technical field especially relates to a short-circuit protection circuit of three-phase contravariant module.
Background
The three-phase inversion module is a device for converting direct current into three-phase alternating current, and in the prior art, a short-circuit protection circuit is arranged in the inversion module of the frequency converter to play a protection role, but the problems of high cost, complex circuit, high circuit layout difficulty and the like of the conventional protection circuit are solved.
Accordingly, the prior art is deficient and needs improvement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, provide a short-circuit protection circuit of three-phase contravariant module.
The technical scheme of the utility model as follows: the utility model provides a short-circuit protection circuit of three-phase contravariant module, include: a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, an eighth diode, a ninth diode, a twelfth diode, an eleventh diode, a twelfth diode, a thirteenth diode, a fourteenth diode, a fifteenth diode, a sixteenth diode, a seventeenth diode, 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 thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, The circuit comprises a fifth capacitor, an isolation optocoupler and a comparator chip, wherein the model of the comparator chip is LM239DG, the second diode, the third diode, the fifth diode, the sixth diode, the eighth diode, the ninth diode, the twelfth diode and the twelfth diode are Schottky diodes, and the thirteenth diode, the fourteenth diode, the fifteenth diode, the sixteenth diode and the seventeenth diode are voltage-stabilizing diodes; the negative pole and the W end electric connection of first diode, the positive pole of first diode with the positive pole electric connection of thirteenth diode, the negative pole of thirteenth diode respectively with the one end of second resistance, the one end of seventh resistance, the one end electric connection of ninth resistance, the other end of ninth resistance with the positive pole electric connection of third diode, the negative pole and the WN + end electric connection of third diode, the other end of second resistance, the one end of third resistance, the one end of fourth resistance, the one end of fifth resistance, the one end of first resistance, the one end of sixth resistance, the third pin of comparator chip, the one end of tenth resistance, the one end of fifteenth resistance, the one end of twenty-first resistance all with DRVOP end electric connection, the other end of seventh resistance respectively with the one end of first electric capacity, the one end of eighth resistance, A fifth pin of the comparator chip is electrically connected, the other end of the first capacitor is respectively electrically connected with the other end of the eighth resistor, the twelfth pin of the comparator chip, one end of the second capacitor, one end of the twelfth resistor, one end of the third capacitor, one end of the seventeenth resistor, one end of the fourth capacitor, one end of the twenty-third resistor, an anode of the seventeenth diode, one end of the fifth capacitor, and a DRVON end, the other end of the first resistor is respectively electrically connected with the fourth pin, the sixth pin, the eighth pin, the tenth pin of the comparator chip, the other end of the fifth capacitor, and a cathode of the seventeenth diode, the cathode of the fourth diode is electrically connected with the VO end, the anode of the fourth diode is electrically connected with the anode of the fourteenth diode, and the cathode of the fourteenth diode is respectively electrically connected with the other end of the third resistor, One end of an eleventh resistor and one end of a fourteenth resistor are electrically connected, the other end of the fourteenth resistor is electrically connected to the anode of the sixth diode, the cathode of the sixth diode is electrically connected to the VN + terminal, the other end of the eleventh resistor is electrically connected to the other end of the second capacitor, the other end of the twelfth resistor and the seventh pin of the comparator chip, respectively, the cathode of the seventh diode is electrically connected to the UO terminal, the anode of the seventh diode is electrically connected to the anode of the fifteenth diode, the cathode of the fifteenth diode is electrically connected to the other end of the fourth resistor, one end of the sixteenth resistor and one end of the nineteenth resistor, the other end of the nineteenth resistor is electrically connected to the anode of the ninth diode, the cathode of the ninth diode is electrically connected to the UN + terminal, and the other end of the sixteenth resistor is electrically connected to the other end of the third capacitor, respectively, The other end of the seventeenth resistor and a ninth pin of the comparator chip are electrically connected, the cathode of the twelfth resistor is electrically connected with the BRK end, the anode of the twelfth resistor is electrically connected with one end of the twentieth resistor, the other end of the twentieth resistor is electrically connected with the other end of the fifth resistor, one end of the twenty-second resistor and the cathode of the sixteenth diode respectively, the anode of the sixteenth diode is electrically connected with the anode of the eleventh diode, the cathode of the eleventh diode is electrically connected with the PB end, the other end of the twenty-second resistor is electrically connected with the other end of the fourth capacitor, the other end of the twenty-third resistor and the eleventh pin of the comparator chip respectively, and the second pin of the comparator chip is electrically connected with the other end of the sixth resistor and the anode of the second diode respectively, a first pin of the comparator chip is electrically connected with the other end of the tenth resistor and an anode of the fifth diode respectively, a fourteen pin of the comparator chip is electrically connected with the other end of the fifteenth resistor and an anode of the eighth diode respectively, a thirteenth pin of the comparator chip is electrically connected with the other end of the twenty-first resistor and an anode of the twelfth diode respectively, a cathode of the second diode, a cathode of the fifth diode, a cathode of the eighth diode and a cathode of the twelfth diode are electrically connected with an anode of a primary side of the isolating optocoupler, a cathode of the primary side of the isolating optocoupler is electrically connected with one end of the eighteenth resistor, the other end of the eighteenth resistor is electrically connected with a VODRN end, an anode of a secondary side of the isolating optocoupler is electrically connected with one end of the thirteenth resistor and the FO end respectively, the other end and the VCC end electric connection of thirteenth resistance, keep apart the negative pole and the GND end electric connection on the vice limit of opto-coupler.
Further, the isolating optocoupler is of the type EL 357N.
Adopt above-mentioned scheme, the beneficial effects of the utility model reside in that: can play the effect of quick protection when three-phase contravariant output short circuit, the electronic components of whole circuit is less in this scheme, has reduced the degree of difficulty and the cost of device overall arrangement, is favorable to solving current circuit relatively complicated, the cost is higher, the circuit layout degree of difficulty is big scheduling problem.
Drawings
Fig. 1 is a circuit diagram of an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, in the present embodiment, the present invention provides a short-circuit protection circuit of a three-phase inverter module, including: a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a seventh diode D7, an eighth diode D8, a ninth diode D9, a twelfth diode D10, an eleventh diode D11, a twelfth diode D12, a thirteenth diode Z1, a fourteenth diode Z2, a fifteenth diode Z3, a sixteenth diode Z4, a seventeenth diode Z5, 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 R7, a ninth resistor R7, a tenth resistor R7, an eleventh resistor R7, a twelfth resistor R7, a thirteenth resistor R7, a fourteenth resistor R7, a sixteenth resistor R7, a nineteenth resistor, The circuit comprises a twenty-second resistor R22, a twenty-third resistor R23, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, an isolation optocoupler P1 and a comparator chip. The comparator chip is LM239DG (including U23A, U23B, U23C and U1D in FIG. 1) and belongs to a four-channel comparator chip. The isolating optocoupler P1 is of the type EL 357N. The second diode D2, the third diode D3, the fifth diode D5, the sixth diode D6, the eighth diode D8, the ninth diode D9, the twelfth diode D10 and the twelfth diode D12 are schottky diodes, and the thirteenth diode Z1, the fourteenth diode Z2, the fifteenth diode Z3, the sixteenth diode Z4 and the seventeenth diode Z5 are zener diodes. A cathode of the first diode D1 is electrically connected to the W end, an anode of the first diode D1 is electrically connected to an anode of the thirteenth diode Z1, a cathode of the thirteenth diode Z1 is electrically connected to one end of the second resistor R2, one end of the seventh resistor R7 and one end of the ninth resistor R9, another end of the ninth resistor R9 is electrically connected to an anode of the third diode D3, a cathode of the third diode D3 is electrically connected to the WN + end, another end of the second resistor R2, one end of the third resistor R3, one end of the fourth resistor R8, one end of the fifth resistor R5, one end of the first resistor R1, one end of the sixth resistor R6, the third pin of the comparator chip, one end of the tenth resistor R10, one end of the fifteenth resistor R15, one end of the twenty-first resistor R1, and the DRVOP 7 are electrically connected to one end of the first resistor R1, and another end of the first capacitor 46c 7 are electrically connected to one end of the first capacitor 1, One end of an eighth resistor R8 and a fifth pin of the comparator chip are electrically connected, the other end of the first capacitor C1 is electrically connected to the other end of the eighth resistor R8, the twelfth pin of the comparator chip, one end of the second capacitor C2, one end of the twelfth resistor R12, one end of the third capacitor C3, one end of the seventeenth resistor R17, one end of the fourth capacitor C4, one end of the twenty-third resistor R23, an anode of the seventeenth diode Z5, one end of the fifth capacitor C5 and a DRVON terminal, the other end of the first resistor R1 is electrically connected to the fourth pin, the sixth pin, the eighth pin and the tenth pin of the comparator chip, the other end of the fifth capacitor C5 and a cathode of the seventeenth diode Z5, the cathode of the fourth diode D4 is electrically connected to the VO terminal, the anode of the fourth diode D4 is electrically connected to the anode of the fourteenth diode Z2, a cathode of the fourteenth diode Z2 is electrically connected to another end of the third resistor R3, one end of an eleventh resistor R11, and one end of a fourteenth resistor R14, another end of the fourteenth resistor R14 is electrically connected to an anode of the sixth diode D6, a cathode of the sixth diode D6 is electrically connected to a VN + terminal, another end of the eleventh resistor R11 is electrically connected to another end of the second capacitor C2, another end of the twelfth resistor R12, and a seventh pin of the comparator chip, a cathode of the seventh diode D7 is electrically connected to a UO terminal, an anode of the seventh diode D7 is electrically connected to an anode of the fifteenth diode Z3, a cathode of the fifteenth diode Z3 is electrically connected to another end of the fourth resistor R4, one end of the sixteenth resistor R16, one end of the nineteenth resistor R19, and another end of the nineteenth resistor R19 is electrically connected to an anode of the nineteenth diode D9, a cathode of the ninth diode D9 is electrically connected to a UN + terminal, another end of the sixteenth resistor R16 is electrically connected to another end of the third capacitor C3, another end of the seventeenth resistor R17, and a ninth pin of the comparator chip, another end of the twelfth diode D10 is electrically connected to a BRK terminal, an anode of the twelfth diode D10 is electrically connected to one end of the twentieth resistor R20, another end of the twentieth resistor R20 is electrically connected to another end of the fifth resistor R5, one end of the twenty-second resistor R22, and a cathode of the sixteenth diode Z4, an anode of the sixteenth diode Z4 is electrically connected to an anode of the eleventh diode D11, a cathode of the eleventh diode is electrically connected to a PB terminal, another end of the twenty-second resistor R22 is electrically connected to another end of the fourth capacitor C4, another end of the twenty-third resistor R23, and another end of the twenty-second resistor R22 are electrically connected to another end of the fourth capacitor C4, the twenty-third resistor, An eleventh pin of a comparator chip is electrically connected, a second pin of the comparator chip is electrically connected with the other end of the sixth resistor R6 and the anode of the second diode D2, respectively, a first pin of the comparator chip is electrically connected with the other end of the tenth resistor R10 and the anode of the fifth diode D5, a fourteenth pin of the comparator chip is electrically connected with the other end of the fifteenth resistor R15 and the anode of the eighth diode D8, respectively, a thirteenth pin of the comparator chip is electrically connected with the other end of the twenty-first resistor R21 and the anode of the twelfth diode D12, respectively, the cathode of the second diode D2, the cathode of the fifth diode D5, the cathode of the eighth diode D8 and the cathode of the twelfth diode D12 are electrically connected with the anode of the primary side of the isolation P1, and the cathode of the isolation P1 is electrically connected with one end of the eighteenth resistor R18, the other end and the DRVON termination electric connection of eighteenth resistance R18, the positive pole of the vice limit of isolation opto-coupler P1 with respectively with thirteenth resistance R13's one end, FO termination electric connection, thirteenth resistance R13's the other end and VCC termination electric connection, the negative pole and the GND termination electric connection of the vice limit of isolation opto-coupler P1.
Referring to fig. 1, in the present embodiment, a W terminal, a VO terminal, and a UO terminal are three-phase ac output terminals, a PB terminal is a braking phase output terminal, a WN + terminal is a lower bridge driving signal corresponding to W, a VN + terminal is a lower bridge driving signal corresponding to VO, a UN + terminal is a lower bridge driving signal corresponding to UO, a BRK terminal is a lower bridge driving signal corresponding to PB braking phase, a DRVOP terminal is a positive power supply, a DRVON terminal is a reference ground corresponding to a DRVOP terminal, a FO terminal is a short-circuit protection signal, a VCC terminal is a positive power supply, a GND terminal is a reference ground corresponding to a VCC terminal, and VCC, GND, DRVOP, and vodrn are two pairs of power supplies and reference grounds isolated from each other. When the circuit is in normal condition, the FO terminal is at high level (level equals to VCC terminal), and when the FO terminal is at low level (level equals to 0.6V), the short-circuit protection signal is valid. When the utility model discloses a circuit during operation to use the W looks as the example, under the normal condition, the voltage of W end is the low level, the voltage of the fifth pin of comparator chip by thirteenth diode Z1 and the first diode D1 decision of rectification, the voltage of the fourth pin of comparator chip by seventeenth diode Z5 is fixed, during the normal condition, the voltage of the fifth pin of comparator chip is less than the voltage of fourth pin, the second pin output low level of comparator chip, it does not have the electric current to pass through to keep apart opto-coupler P1 primary side, keep apart opto-coupler P1's secondary limit and do not open, and the high level that the voltage VCC was drawn to by thirteen resistance R13 as pull-up resistance is held. When a short-circuit fault occurs, a signal at the end W is changed from a low level to a high level, a voltage value of a fifth pin of the comparator chip is increased by a series resistor divided voltage DRVOP which is formed by shortening a second resistor R2, a seventh resistor R7 and an eighth resistor R8, the voltage of the fifth pin of the comparator chip is higher than that of a fourth pin, so that the level of the second pin of the comparator chip is pulled high by the sixth resistor R6, the voltage of the positive electrode of the primary side of the isolating optocoupler P1 is pulled high by the second diode D2, the isolating optocoupler P1 starts to work, the voltage of the positive electrode of the secondary side of the isolating optocoupler P1 is pulled low, the FO end is changed to a low level, and the FO WN + plays a role of fast turn-off when a fault occurs, so that the IGBT can be turned off fast, and a protection function is realized. The working principle of the VO, UO and PB phases in this scheme is the same as that of the W phase, and is not described herein again.
To sum up, the utility model discloses can play the effect of quick protection when three-phase contravariant output short circuit, the electronic components of whole circuit is less in this scheme, has reduced the degree of difficulty and the cost of device overall arrangement, is favorable to solving current circuit relatively complicated, the cost is higher, the big scheduling problem of the circuit layout degree of difficulty.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. A short-circuit protection circuit of a three-phase inverter module, comprising: a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, an eighth diode, a ninth diode, a twelfth diode, an eleventh diode, a twelfth diode, a thirteenth diode, a fourteenth diode, a fifteenth diode, a sixteenth diode, a seventeenth diode, 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 thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, The circuit comprises a fifth capacitor, an isolation optocoupler and a comparator chip, wherein the model of the comparator chip is LM239DG, the second diode, the third diode, the fifth diode, the sixth diode, the eighth diode, the ninth diode, the twelfth diode and the twelfth diode are Schottky diodes, and the thirteenth diode, the fourteenth diode, the fifteenth diode, the sixteenth diode and the seventeenth diode are voltage-stabilizing diodes; the negative pole and the W end electric connection of first diode, the positive pole of first diode with the positive pole electric connection of thirteenth diode, the negative pole of thirteenth diode respectively with the one end of second resistance, the one end of seventh resistance, the one end electric connection of ninth resistance, the other end of ninth resistance with the positive pole electric connection of third diode, the negative pole and the WN + end electric connection of third diode, the other end of second resistance, the one end of third resistance, the one end of fourth resistance, the one end of fifth resistance, the one end of first resistance, the one end of sixth resistance, the third pin of comparator chip, the one end of tenth resistance, the one end of fifteenth resistance, the one end of twenty-first resistance all with DRVOP end electric connection, the other end of seventh resistance respectively with the one end of first electric capacity, the one end of eighth resistance, A fifth pin of the comparator chip is electrically connected, the other end of the first capacitor is respectively electrically connected with the other end of the eighth resistor, the twelfth pin of the comparator chip, one end of the second capacitor, one end of the twelfth resistor, one end of the third capacitor, one end of the seventeenth resistor, one end of the fourth capacitor, one end of the twenty-third resistor, an anode of the seventeenth diode, one end of the fifth capacitor, and a DRVON end, the other end of the first resistor is respectively electrically connected with the fourth pin, the sixth pin, the eighth pin, the tenth pin of the comparator chip, the other end of the fifth capacitor, and a cathode of the seventeenth diode, the cathode of the fourth diode is electrically connected with the VO end, the anode of the fourth diode is electrically connected with the anode of the fourteenth diode, and the cathode of the fourteenth diode is respectively electrically connected with the other end of the third resistor, One end of an eleventh resistor and one end of a fourteenth resistor are electrically connected, the other end of the fourteenth resistor is electrically connected to the anode of the sixth diode, the cathode of the sixth diode is electrically connected to the VN + terminal, the other end of the eleventh resistor is electrically connected to the other end of the second capacitor, the other end of the twelfth resistor and the seventh pin of the comparator chip, respectively, the cathode of the seventh diode is electrically connected to the UO terminal, the anode of the seventh diode is electrically connected to the anode of the fifteenth diode, the cathode of the fifteenth diode is electrically connected to the other end of the fourth resistor, one end of the sixteenth resistor and one end of the nineteenth resistor, the other end of the nineteenth resistor is electrically connected to the anode of the ninth diode, the cathode of the ninth diode is electrically connected to the UN + terminal, and the other end of the sixteenth resistor is electrically connected to the other end of the third capacitor, respectively, The other end of the seventeenth resistor and a ninth pin of the comparator chip are electrically connected, the cathode of the twelfth resistor is electrically connected with the BRK end, the anode of the twelfth resistor is electrically connected with one end of the twentieth resistor, the other end of the twentieth resistor is electrically connected with the other end of the fifth resistor, one end of the twenty-second resistor and the cathode of the sixteenth diode respectively, the anode of the sixteenth diode is electrically connected with the anode of the eleventh diode, the cathode of the eleventh diode is electrically connected with the PB end, the other end of the twenty-second resistor is electrically connected with the other end of the fourth capacitor, the other end of the twenty-third resistor and the eleventh pin of the comparator chip respectively, and the second pin of the comparator chip is electrically connected with the other end of the sixth resistor and the anode of the second diode respectively, a first pin of the comparator chip is electrically connected with the other end of the tenth resistor and an anode of the fifth diode respectively, a fourteen pin of the comparator chip is electrically connected with the other end of the fifteenth resistor and an anode of the eighth diode respectively, a thirteenth pin of the comparator chip is electrically connected with the other end of the twenty-first resistor and an anode of the twelfth diode respectively, a cathode of the second diode, a cathode of the fifth diode, a cathode of the eighth diode and a cathode of the twelfth diode are electrically connected with an anode of a primary side of the isolating optocoupler, a cathode of the primary side of the isolating optocoupler is electrically connected with one end of the eighteenth resistor, the other end of the eighteenth resistor is electrically connected with a VODRN end, an anode of a secondary side of the isolating optocoupler is electrically connected with one end of the thirteenth resistor and the FO end respectively, the other end and the VCC end electric connection of thirteenth resistance, keep apart the negative pole and the GND end electric connection on the vice limit of opto-coupler.
2. The short-circuit protection circuit of the three-phase inverter module as claimed in claim 1, wherein the isolating optocoupler is of type EL 357N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021880292.XU CN212908987U (en) | 2020-09-01 | 2020-09-01 | Short-circuit protection circuit of three-phase inversion module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021880292.XU CN212908987U (en) | 2020-09-01 | 2020-09-01 | Short-circuit protection circuit of three-phase inversion module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212908987U true CN212908987U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021880292.XU Active CN212908987U (en) | 2020-09-01 | 2020-09-01 | Short-circuit protection circuit of three-phase inversion module |
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| Country | Link |
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| CN (1) | CN212908987U (en) |
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2020
- 2020-09-01 CN CN202021880292.XU patent/CN212908987U/en active Active
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