Power supply system for motor controller and motor controller

Abstract

The invention provides a power supply system for a motor controller and the motor controller. The power supply system comprises a high-voltage battery, a low-voltage battery, a switch tube driving power supply, a power supply management unit, a high-voltage power supply, a low-voltage power supply, and a transferring unit, wherein the high-voltage power supply converts output voltage of the high-voltage battery to a first voltage output; the low-voltage power supply converts output voltage of the low-voltage battery to a second voltage output; and the transferring unit is used for determining a power supply of the power supply management unit according to the voltage size of a first input end and a third input end and determining a power supply of the switch tube driving power supply according to the voltage size of the first input end and a second input end. According to the power supply system for the motor controller, two independent power supplies of the low-voltage battery and the high-voltage battery are connected with a motor controller system, so that safety of motor control is controlled.

Description

technical field [0001] The invention relates to the field of motor controllers, more specifically, to a motor controller power supply system and a motor controller. Background technique [0002] As the application of new energy vehicles becomes more and more extensive, the safety requirements for new energy vehicles are also getting higher and higher. When a new energy vehicle is in normal operation, when a low voltage power supply (LVPS) failure occurs suddenly or the low voltage battery cable falls off, it will cause the system to stop suddenly, resulting in loss of control of the motor torque and speed. New energy vehicles It will suddenly lose power, which will bring serious safety hazards to the driver. [0003] In the current new energy vehicle motor controller, when there is an abnormality such as a low-voltage power supply failure or a low-voltage battery cable falling off, there is no good solution to deal with this failure, and it can only rely on the capacitor at...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a new motor controller power supply system and motor controller for the above-mentioned new energy vehicles that are out of control when the low-voltage power supply fails or is abnormally connected.

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