MOTOR CONTROL SYSTEM OF ELECTRIC VEHICLE AND CONTROLLING METHOD FOR MOTOR CONTROL SYSTEM OF ELECTRIC VEHICLE AND ELECTRIC VEHICLE

摘要

A motor control system of an electric vehicle, a controlling method for the motor control system and an electric vehicle are provided. The motor control system includes: an IGBT module, connected with a motor of the electric vehicle; a detection module, configured to detect a motor speed; a drive module, configured to drive IGBTs in the IGBT module to turn on or off so as to control the motor to work or stop working; a first control module; a second control module communicated with the first control module; and a channel selection module, configured to select a channel of the second control module when the first control module has a fault. When the second control module is selected, it sends a second control signal to the drive module according to the motor speed at a predetermined time before the first control module has the fault, so as to control the motor to stop working.

主权项

1. A motor control system of an electric vehicle, comprising:
an IGBT module, configured to be connected with a motor of the electric vehicle; a detection module, configured to be connected with the motor, and configured to detect a motor speed; a drive module, connected with the IGBT module, and configured to drive IGBTs in the IGBT module to turn on or off so as to control the motor to work or stop working; a first control module, connected with the detection module; a second control module, communicated with the first control module; and a channel selection module, connected with the drive module, the first control module and the second control module respectively, and configured to select a channel of the first control module or the second control module, wherein when the first control module has a fault, the channel selection module selects the channel of the second control module; when the channel selection module selects the channel of the first control module, the first control module sends a first control signal to the drive module so as to control the drive module to drive the IGBTs in IGBT module to turn on or off; and when the channel selection module selects the channel of the second control module, the second control module sends a second control signal to the drive module according to the motor speed at a predetermined time before the first control module has the fault, so as to control the motor to stop working, wherein the motor speed is the motor speed at a predetermined time before the first control module has the fault or the current motor speed.