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CN-224204975-U - SIC MOS driving source circuit

CN224204975UCN 224204975 UCN224204975 UCN 224204975UCN-224204975-U

Abstract

The utility model provides a SIC MOS driving source circuit, which comprises a first voltage stabilizing circuit and a second voltage stabilizing circuit, wherein the second voltage stabilizing voltage dividing circuit comprises a voltage dividing circuit and a second voltage stabilizing circuit, a first port of the first voltage stabilizing circuit is connected with an output port of a first voltage source, a first port of the second voltage stabilizing circuit is connected with a second port of the first voltage stabilizing circuit, the voltage dividing circuit is connected with two ends of the first port of the second voltage stabilizing circuit and two ends of the second port of the first voltage stabilizing circuit in parallel, the voltage dividing circuit comprises a third capacitor and an eighth capacitor which are connected in series, and the second port of the second voltage stabilizing circuit is used for connecting a driving source of a SIC MOS driving controller.

Inventors

  • WANG RUIDONG
  • WANG FEIFEI
  • YU JIAXING
  • WU LIANGCAI
  • PAN CAI

Assignees

  • 深圳古瑞瓦特新能源有限公司

Dates

Publication Date
20260505
Application Date
20250328

Claims (10)

  1. 1. The SIC MOS driving source circuit is characterized by comprising a first voltage stabilizing circuit and a second voltage stabilizing and dividing circuit, wherein the second voltage stabilizing and dividing circuit comprises a voltage dividing circuit and a second voltage stabilizing circuit, a first port of the first voltage stabilizing circuit is connected with an output port of a first voltage source, a first port of the second voltage stabilizing circuit is connected with a second port of the first voltage stabilizing circuit, the voltage dividing circuit is connected with two ends of the first port of the second voltage stabilizing circuit and two ends of the second port of the first voltage stabilizing circuit in parallel, the voltage dividing circuit comprises a third capacitor and an eighth capacitor which are connected in series, and a second port of the second voltage stabilizing circuit is used for connecting a driving source of the SIC MOS driving controller.
  2. 2. The SIC MOS drive source circuit of claim 1 further comprising a capacitive filter circuit connected in parallel between the first voltage source and the first voltage stabilizing circuit.
  3. 3. The SIC MOS drive source circuit of claim 2, wherein the capacitive filter circuit comprises a filter capacitor.
  4. 4. The SIC MOS drive source circuit of any one of claims 1 to 3 wherein the first voltage stabilizing circuit comprises a third resistor, a fifth resistor, a seventh resistor, a first switch and a second voltage stabilizer, one end of the third resistor is connected with the positive end of the output port of the first voltage source and the current input end of the first switch, the other end of the third resistor is connected with the control end of the first switch and the cathode of the second voltage stabilizer, the current output end of the first switch is connected with one end of the fifth resistor and then serves as the positive end of the second port of the first voltage stabilizing circuit, the other end of the fifth resistor is connected with one end of the seventh resistor and the reference electrode of the second voltage stabilizer, and the other end of the seventh resistor and the anode of the second voltage stabilizer are connected with the negative end of the output port of the first voltage source and serve as the negative end of the second port of the first voltage stabilizing circuit.
  5. 5. The SIC MOS drive source circuit of any one of claims 1-3 wherein the second voltage regulator circuit comprises a first voltage regulator, a fourth resistor, a sixth resistor, an eighth resistor, and a first voltage regulator diode, one end of the third capacitor is connected to the positive terminal of the second port of the first voltage regulator circuit, the cathode of the first voltage regulator, and one end of the fourth resistor and serves as the positive terminal of the second port of the second voltage regulator circuit, the other end of the fourth resistor is connected to the reference electrode of the first voltage regulator and one end of the sixth resistor, the other end of the sixth resistor is connected to the negative electrode of the first voltage regulator diode, the ground, the anode of the first voltage regulator, the other end of the third capacitor, one end of the eighth resistor, and one end of the eighth capacitor, the other end of the eighth resistor, the anode of the first voltage regulator diode is connected to the second terminal of the second voltage regulator circuit, and serves as the negative terminal of the second voltage regulator circuit.
  6. 6. The SIC MOS drive source circuit of any one of claims 1-3 wherein the first voltage regulator circuit comprises a second voltage regulator diode having a negative terminal connected to the positive terminal of the output port of the first voltage source and serving as the positive terminal of the second port of the first voltage regulator circuit, and a positive terminal connected to the negative terminal of the output port of the first voltage source and serving as the negative terminal of the second port of the first voltage regulator circuit.
  7. 7. The SIC MOS drive source circuit of any one of claims 1-3 in which the first voltage regulator circuit comprises an LDO chip having an input terminal connected to a positive terminal of the output port of the first voltage source, an output terminal of the LDO chip being a positive terminal of the second port of the first voltage regulator circuit, a ground terminal of the LDO chip being a negative terminal of the output port of the first voltage source, and being a negative terminal of the second port of the first voltage regulator circuit.
  8. 8. The SIC MOS drive source circuit of any one of claims 1 to 3 wherein the second voltage stabilizing circuit comprises a sixth resistor and a first voltage stabilizing diode, one end of the third capacitor and a cathode of the first voltage stabilizing diode are connected to a positive end of the second port of the first voltage stabilizing circuit and serve as a positive end of the second port of the second voltage stabilizing circuit, the other end of the third capacitor, an anode of the first voltage stabilizing diode, one end of the eighth capacitor and one end of the sixth resistor are grounded, and the other end of the eighth capacitor and the other end of the sixth resistor are connected to a negative end of the second port of the first voltage stabilizing circuit and serve as a negative end of the second port of the second voltage stabilizing circuit.
  9. 9. The SIC MOS drive source circuit of any one of claims 1 to 3 wherein the second voltage stabilizing circuit comprises a sixth resistor and a first voltage stabilizing diode, one end of the third capacitor and one end of the sixth resistor are connected to the positive end of the second port of the first voltage stabilizing circuit and serve as the positive end of the second port of the second voltage stabilizing circuit, the other end of the third capacitor, the cathode of the first voltage stabilizing diode, one end of the eighth capacitor and the other end of the sixth resistor are grounded, and the other end of the eighth capacitor and the anode of the first voltage stabilizing diode are connected to the negative end of the second port of the first voltage stabilizing circuit and serve as the negative end of the second port of the second voltage stabilizing circuit.
  10. 10. The SIC MOS drive source circuit of any one of claims 1 to 3 wherein the second voltage regulator circuit comprises a first voltage regulator, a fourth resistor, a sixth resistor, and an eighth resistor, one end of the third capacitor and one end of the eighth resistor are connected to the positive terminal of the second port of the first voltage regulator circuit and serve as the positive terminal of the second port of the second voltage regulator circuit, the other end of the third capacitor, the other end of the eighth resistor, one end of the fourth resistor, one end of the eighth resistor, and the cathode ground line of the first voltage regulator, the other end of the fourth resistor, one end of the sixth resistor are connected to the reference electrode of the first voltage regulator, and the other end of the first voltage regulator, the other end of the eighth resistor, and the other end of the sixth resistor are connected to the negative terminal of the second port of the first voltage regulator circuit and serve as the negative terminal of the second port of the second circuit.

Description

SIC MOS driving source circuit Technical Field The utility model relates to the technical field of power electronic conversion, in particular to a SIC MOS driving source circuit. Background In the prior art, a driving source circuit of a SIC MOS (collectively referred to as a silicon carbide metal oxide semiconductor field effect transistor) usually adopts an auxiliary source (SPS) which is designed independently, or partial power supply voltage is separated from the auxiliary source which is common to a system, so as to generate a voltage which is close to the driving voltage range of the SIC MOS, the voltage is usually called a primary power supply, and the primary power supply is used as a driving source of the SIC MOS after a voltage stabilizing amplifying circuit is added. The method has the advantages that although the method has more accurate voltage range and accuracy, under the condition that the driving voltage difference of SIC MOS manufacturers is large, reliable design is needed, otherwise, large power consumption can occur, if compatible substitute materials are replaced, circuit parameters can be matched again, even if a transformer is adopted, the design of the transformer is needed to be changed, the change range is large, the compatibility is poor, the utilization rate of auxiliary sources of independent design is low, the occupied space is larger, and the power density is not improved. The latter has better compatibility, but is easily influenced by other power supply circuits due to the adoption of auxiliary sources of a public system, and has poorer source load adjustment rate, dynamic response and voltage stabilizing precision. Disclosure of utility model The utility model aims to provide a SIC MOS driving source circuit, which solves the problems of high power consumption, poor compatibility, low precision and the like of the SIC MOS driving source circuit in the prior art. The utility model provides a SIC MOS driving source circuit, which comprises a first voltage stabilizing circuit and a second voltage stabilizing and dividing circuit, wherein the second voltage stabilizing and dividing circuit comprises a voltage dividing circuit and a second voltage stabilizing circuit, a first port of the first voltage stabilizing circuit is connected with an output port of a first voltage source, a first port of the second voltage stabilizing circuit is connected with a second port of the first voltage stabilizing circuit, the voltage dividing circuit is connected with two ends of the first port of the second voltage stabilizing circuit and two ends of the second port of the first voltage stabilizing circuit in parallel, the voltage dividing circuit comprises a third capacitor and an eighth capacitor which are connected in series, and a second port of the second voltage stabilizing circuit is used for connecting a driving source of a SIC MOS driving controller. Further, the voltage regulator further comprises a capacitance filter circuit, wherein the capacitance filter circuit is connected in parallel between the first voltage source and the first voltage stabilizing circuit. Further, the capacitive filter circuit includes a filter capacitor. The first voltage stabilizing circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth switch and a second voltage stabilizer, wherein one end of the first resistor is connected with the positive end of the output port of the first voltage source and the current input end of the first switch, the other end of the first resistor is connected with the control end of the first switch and the output end of the second voltage stabilizer, the current output end of the first switch is connected with one end of the fifth resistor and then serves as the positive end of the second port of the first voltage stabilizing circuit, the other end of the fifth resistor is connected with one end of the seventh resistor and the reference electrode of the second voltage stabilizer, and the other end of the seventh resistor and the anode of the second voltage stabilizer are connected with the negative end of the output port of the first voltage source and serve as the negative end of the second port of the first voltage stabilizing circuit. The second voltage stabilizing circuit further comprises a first voltage stabilizer, a fourth resistor, a sixth resistor, an eighth resistor and a first voltage stabilizing diode, wherein one end of the third capacitor is connected with the positive end of the second port of the first voltage stabilizing circuit, the output end of the first voltage stabilizer and one end of the fourth resistor and serves as the positive end of the second port of the second voltage stabilizing circuit, the other end of the fourth resistor is connected with the reference electrode of the first voltage stabilizer and one end of the sixth resistor, the other end of the sixth resistor is connected with the negative elec