Power supply anti-backflow system of motor controller

Abstract

The invention discloses a power supply anti-backflow system of a motor controller. The power supply anti-backflow system comprises a storage battery, a main power supply, an anti-backflow circuit, a rear-stage power supply and a slave power supply which are connected in sequence, wherein the positive electrode of the storage battery is further connected with a low-voltage fault judgment circuit; the output end of the low-voltage fault judgment circuit is connected with the anti-backflow circuit and a high-voltage-to-low-voltage circuit separately; the input end of the high-voltage-to-low-voltage circuit is connected with a power battery, and the output end is connected with the rear-stage power supply through a redundant power supply; a CAN transceiver chip power supply circuit is connected with the main power supply and the slave power supply for supplying power separately; the rear-stage power supply and the slave power supply are connected through a power supply chip; and the powersupply chip is further connected with a backup power supply, and the backup power supply supplies power to the CAN transceiver chip power supply circuit. On the basis of the angle of a part controllersystem, the safety of the whole anti-backflow system can be monitored, and the safety of related functions of the whole vehicle is ensured; and when a KL15 hard wire in the whole vehicle wire harnessis broken, it is ensured that the CAN communication of the controller is normal, and the requirement of the whole vehicle can be responded in real time.

Description

technical field [0001] The invention relates to a motor controller power supply, in particular to a motor controller power supply anti-backflow system. Background technique [0002] The current anti-backflow technical solution for the power supply of the motor controller is that when the KL30 (battery positive) signal is disconnected or the undervoltage falls below the safety threshold of 9V, the low-voltage detection circuit reports a low-voltage fault, and at the same time, the low-voltage fault logic signal triggers the high-voltage to low-voltage circuit to start Work, generate redundant power supply, namely 12V, to supply power to the subsequent power supply system. [0003] According to related projects, hardware damage occurred in the on-site high-voltage to low-voltage circuit, which led to the failure of the redundant function. The 12V will be poured into the KL30 signal to supply power to the 12V system of the vehicle, and the overload condition will appear quickl...

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to provide a power supply anti-backflow system for a motor controller, which solves the problem of power backflow caused by the redundant power supply inside the controller when the KL30 signal is disconnected or lower than the set threshold, so as to achieve more safety and reliability Redundant design; when the motor controller has a redundant power supply function and needs to meet the CAN wake-up function, this solution can ensure that the communication between the motor controller and the CAN network of the vehicle remains normal

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