Power distribution control circuit of vehicle-mounted motor controller of electric vehicle and control method of control circuit

Abstract

The invention discloses a power distribution control circuit of a vehicle-mounted motor controller of an electric vehicle and a control method of the control circuit. The control circuit comprises a power battery, a complete vehicle logic unit, the vehicle-mounted motor controller, a drive motor controller, a power-on buffer circuit, a CAN bus and a vehicle-mounted electric control switch, wherein the complete vehicle logic unit is connected with the power battery, the vehicle-mounted motor controller and the drive motor controller, connected with a first electric control switch and a second electric control switch through low-tension control wires and then grounded; a negative electrode of the battery is connected to the vehicle-mounted motor controller and the drive motor controller; a positive electrode of the battery is connected with a parallel circuit formed by the power-on buffer circuit and the second electrical control switch and then connected to the drive motor controller and the vehicle-mounted motor controller. Multiple motor controllers share one power-on buffer circuit through specific control logic, a relay is used among the motor controllers for power distribution control, normal demands are met, and electrical safety can also be guaranteed.

Description

technical field [0001] The invention relates to the technical field of electric vehicle control, in particular to a power distribution control circuit of a motor controller mounted on an electric vehicle and a control method thereof. Background technique [0002] When a pure electric vehicle is used as a special vehicle, it needs to be equipped with a top-mounted motor power system: for example, a sprinkler needs to be equipped with a sprinkler motor, and a sweeping vehicle needs to be equipped with a sweeping motor. When the motor controller is connected to a high-voltage power supply, there is an instantaneous current pulse that will cause damage to the fuse and relay of the power distribution. If each motor controller is equipped with a power-on buffer circuit, the cost will increase significantly. [0003] It will be very meaningful if a high-voltage power distribution method for solving the above-mentioned problems can be provided. Contents of the invention [0004] ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem in the prior art that the bodywork system that does not need to be opened during the driving process always has a DC high-voltage power supply and there is a risk, the present invention provides an electric vehicle bodywork motor controller power distribution control circuit and control method

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