Power electronic controller based on SIC power semiconductor single-tube parallel connection

Abstract

The invention discloses a power electronic controller based on SIC power semiconductor single-tube parallel connection. The controller comprises a shell, a discrete device module, a drive circuit board, a control circuit board, a capacitor module, a filtering module, and a water cooling module. The discrete device module, the driving circuit board, the control circuit board, the filtering module and the water cooling module are all installed on the shell. According to the power electronic controller based on SIC power semiconductor single-tube parallel connection disclosed by the invention, single-tube parallel connection is carried out by using discrete devices based on SIC-based power semiconductor discrete devices, and the requirements of inverters for electric vehicles with different powers and current levels are met.

Description

technical field [0001] The invention belongs to the technical field of power electronic controllers, and in particular relates to a power electronic controller based on SIC power semiconductor single-tube parallel connection. Background technique [0002] In the motor drive system of the drive motor, the power electronic controller PEU is used to control and adjust the speed of the drive motor, and the PEU simultaneously inverts the DC high voltage input from the power battery into AC high voltage as the current input of the drive motor. The main functions of PEU include the following two points: [0003] First, as an energy transmission device between the power battery and the drive motor, it has an inverter function, that is, a DC-AC conversion function. For example, it can convert the high-voltage direct current input by the power battery into a three-phase high-voltage alternating current and transmit it to the drive motor; [0004] Second, as a control signal interfac...

AI Technical Summary

Problems solved by technology

The problem with this is that it cannot meet the needs of electric vehicles with different power levels

The power level is not scalable, limited by the IGBT package module

[0008] 3. EMC problems of SIC-based power semiconductor controllers

Compared with SI-based semiconductors, SIC-based power semiconductors have more severe EMC problems due to their higher switching frequency

[0009] 4. The products generally have the problems of large volume and low integration

High cost and low power density

Taking the SI-based IGBT package module (Infineon FS820 series) inverter as an example, the volume of inverters in the domestic electric vehicle market is generally around 7L, and the power density is lower than 25KW / L

The reason for this phenomenon is mainly due to the low capability of SI-based power semiconductors, and secondly, the use of standard-packaged IGBT modules limits the structural design, and the cost of Infineon’s standard-packaged modules is very high.

Domestic mass-produced electric vehicle inverter control circuit board, drive circuit board split structure, drive board and control circuit board are connected by flat wires, or connected by board-to-board connectors, high cost and low integration

[0010] 5. Inverter products designed based on SI-based IGBT modules generally have the problem of large stray inductance of the inverter circuit. Generally, the inductance of the inverter circuit is greater than 25nH

The stray inductance of the inverter circuit is large, which will seriously affect the efficiency and power consumption of the inverter.

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