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CN-224218277-U - Adjustable IGBT power distribution circuit

CN224218277UCN 224218277 UCN224218277 UCN 224218277UCN-224218277-U

Abstract

The utility model relates to the technical field of IGBT devices, in particular to an adjustable IGBT power distribution circuit which comprises a driving module, an IGBT module, a measuring module and a main control module which are electrically connected in sequence, wherein the measuring module comprises a current sampling unit, a voltage sampling unit, a first analog-to-digital conversion unit and a second analog-to-digital conversion unit, the current sampling unit is used for acquiring current data entering a collector of the IGBT module, the voltage sampling unit is used for acquiring voltage data of the collector of the IGBT module, and the main control module calculates a power value and controls the driving module according to the current data and the voltage data. According to the utility model, synchronous acquisition and high-precision digitization of current and voltage signals are realized, signal interference is obviously reduced, the accuracy of power calculation is ensured, the main control module dynamically adjusts the output of the driving module based on the real-time power value, the load change can be responded quickly, the power distribution efficiency is optimized, and local overload or resource waste is avoided.

Inventors

  • ZHANG XINGCHAO
  • LI LONG
  • WANG XUEHE

Assignees

  • 江苏芯华睿微电子有限公司

Dates

Publication Date
20260508
Application Date
20250604

Claims (4)

  1. 1. The adjustable IGBT power distribution circuit is characterized by comprising a driving module (1), an IGBT module (2), a measuring module (3) and a main control module (4) which are electrically connected in sequence, wherein the measuring module (3) comprises a current sampling unit (30), a voltage sampling unit (31), a first analog-to-digital conversion unit (32) and a second analog-to-digital conversion unit (33), the current sampling unit (30) is used for acquiring current data entering a collector of the IGBT module (2), the voltage sampling unit (31) is used for acquiring voltage data of the collector of the IGBT module (2), the current sampling unit (30), the first analog-to-digital conversion unit (32) and the main control module (4) are electrically connected in sequence, and the voltage sampling unit (31), the second analog-to-digital conversion unit (33) and the main control module (4) are electrically connected in sequence, and the main control module (4) calculates a power value according to the current data and the voltage data and controls the driving module (1).
  2. 2. The adjustable IGBT power distribution circuit according to claim 1, wherein the driving module (1) comprises a switching tube Q1, a switching tube Q2, a resistor R1, a resistor R2 and a capacitor C1, the switching tube Q1 is an NPN triode, and the switching tube Q2 is a PNP triode; the collector of the switch tube Q1 is connected with a power +VCC, the emitter of the switch tube Q1 is connected with the emitter of the switch tube Q2, the collector of the switch tube Q2 is connected with the power-VCC, the first end of the resistor R1 is connected with the output port of the driving module (1), the second end of the resistor R1 is simultaneously connected with the bases of the switch tube Q1 and the switch tube Q2, the first end of the resistor R2 is connected with the emitter of the switch tube Q1, the second end of the resistor R2 is connected with the base of the IGBT module (2), the first end of the capacitor C1 is connected with the second end of the resistor R2, and the second end of the capacitor C1 is grounded.
  3. 3. The adjustable IGBT power distribution circuit as set forth in claim 1, wherein said current sampling unit (30) comprises a resistor R3, a resistor R4, a resistor R5, a resistor R6, and an operational amplifier U1; The resistor R3 is connected in series at the collector of the IGBT module (2), the first end of the resistor R4 is connected with the second end of the resistor R3, the second end of the resistor R4 is connected with the in-phase input end of the operational amplifier U1, the first end of the resistor R5 is connected with the first end of the resistor R3, the second end of the resistor R5 is connected with the inverting input end of the operational amplifier U1, the second end of the resistor R5 is connected with the output end of the operational amplifier U1, the first end of the resistor R6 is connected with the in-phase input end of the operational amplifier U1, the second end of the resistor R6 is grounded, and the output end of the operational amplifier U1 is connected with the input end of the first analog-digital conversion unit (32).
  4. 4. The adjustable IGBT power distribution circuit according to claim 1, wherein the voltage sampling unit (31) comprises a switching tube Q3, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, an operational amplifier U2 and a capacitor C2, and the switching tube Q3 is an NMOS tube; The drain electrode of the switch tube Q3 is connected with the collector electrode of the IGBT module (2), the first end of the resistor R7 is connected with the base electrode of the driving module (1), the second end of the resistor R7 is connected with the first end of the resistor R8, the second end of the resistor R8 is connected with the ground, the source electrode of the switch tube Q3 is connected with the first end of the resistor R9, the second end of the resistor R9 is connected with the second end of the switch tube Q3, the first end of the resistor R10 is connected with the non-inverting input end of the operational amplifier U2, the first end of the capacitor C2 is connected with the ground, the first end of the resistor R11 is connected with the inverting input end of the operational amplifier U2, the second end of the resistor R12 is connected with the output end of the operational amplifier U2, and the output end of the operational amplifier U2 is connected with the input end of the second analog-digital conversion unit (33).

Description

Adjustable IGBT power distribution circuit Technical Field The utility model relates to the technical field of IGBT devices, in particular to an adjustable IGBT power distribution circuit. Background The IGBT is a composite fully-controlled voltage-driven power semiconductor device, has both high input impedance of MOSFET (metal-oxide semiconductor field effect transistor) and low on-voltage drop characteristic of BJT (bipolar transistor), and is widely used in high-voltage and high-current power electronic systems. In the existing IGBT power distribution circuit, a control mode of fixed parameters is generally adopted, dynamic power adjustment is difficult to achieve, system efficiency is low, adaptability is insufficient, and partial schemes attempt to introduce a feedback mechanism, but rely on detection of single parameters, real-time power cannot be calculated accurately, and control accuracy is affected. Disclosure of utility model The present utility model is directed to an adjustable IGBT power distribution circuit to solve the above-mentioned problems. In order to achieve the above purpose, the present utility model provides the following technical solutions: The adjustable IGBT power distribution circuit comprises a driving module, an IGBT module, a measuring module and a main control module which are electrically connected in sequence, wherein the measuring module comprises a current sampling unit, a voltage sampling unit, a first analog-to-digital conversion unit and a second analog-to-digital conversion unit, the current sampling unit is used for acquiring current data entering a collector of the IGBT module, the voltage sampling unit is used for acquiring voltage data of the collector of the IGBT module, the current sampling unit, the first analog-to-digital conversion unit and the main control module are electrically connected in sequence, the voltage sampling unit, the second analog-to-digital conversion unit and the main control module are electrically connected in sequence, and the main control module calculates a power value and controls the driving module according to the current data and the voltage data. Preferably, the driving module includes a switching tube Q1, a switching tube Q2, a resistor R1, a resistor R2 and a capacitor C1, the switching tube Q1 is an NPN triode, and the switching tube Q2 is a PNP triode; The collector of the switch tube Q1 is connected with the power +VCC, the emitter of the switch tube Q1 is connected with the emitter of the switch tube Q2, the collector of the switch tube Q2 is connected with the power-VCC, the first end of the resistor R1 is connected with the output port of the driving module, the second end of the resistor R1 is simultaneously connected with the bases of the switch tube Q1 and the switch tube Q2, the first end of the resistor R2 is connected with the emitter of the switch tube Q1, the second end of the resistor R2 is connected with the base of the IGBT module, the first end of the capacitor C1 is connected with the second end of the resistor R2, and the second end of the capacitor C1 is grounded. Preferably, the current sampling unit includes a resistor R3, a resistor R4, a resistor R5, a resistor R6, and an operational amplifier U1; The resistor R3 is connected in series at the collector of the IGBT module, the first end of the resistor R4 is connected with the second end of the resistor R3, the second end of the resistor R4 is connected with the in-phase input end of the operational amplifier U1, the first end of the resistor R5 is connected with the first end of the resistor R3, the second end of the resistor R5 is connected with the inverting input end of the operational amplifier U1, the second end of the resistor R5 is connected with the output end of the operational amplifier U1, the first end of the resistor R6 is connected with the in-phase input end of the operational amplifier U1, the second end of the resistor R6 is grounded, and the output end of the operational amplifier U1 is connected with the input port of the first analog-digital conversion unit. Preferably, the voltage sampling unit includes a switching tube Q3, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, an operational amplifier U2, and a capacitor C2, where the switching tube Q3 is an NMOS tube; The drain electrode of the switch tube Q3 is connected with the collector electrode of the IGBT module, the first end of the resistor R7 is connected with the base electrode of the driving module, the second end of the resistor R7 is connected with the first end of the resistor R8, the second end of the resistor R8 is connected with the ground, the source electrode of the switch tube Q3 is connected with the first end of the resistor R9, the second end of the switch tube Q3 is connected with the second end of the resistor R7, the first end of the resistor R10 is connected with the first end of the resistor R9, the second end of