Controller for electric vehicle

Abstract

In order to make an electric vehicle used normally when a rolling handle, a brake lever and / or a Hall element of an electric motor are damaged, the invention provides a controller for the electric vehicle. The controller comprises a central control unit, a driving circuit connected with a motor control output end of the central control unit for controlling a brushless motor, a rolling handle control input circuit connected with a rotating speed control input end of the central control unit, and a cruise switch connected with a cruise control input end of the central control unit, wherein the rolling handle control input circuit is connected with the rolling handle for controlling the rotating speed of the electric motor; when the central control unit detects that voltage at the rolling handle control input end is not within a preset range, the central control unit judges out that the rolling handle control input circuit or the rolling handle fails and then enters into a cruise control mode, namely, only when the cruise switch is shut off, the central control unit controls the brushless motor to rotate at a preset rotating speed through the driving circuit, and the preset rotating speed is generally half of the maximum velocity when the electric vehicle runs normally.

Description

technical field

[0001] The invention relates to an electric vehicle controller. Background technique

[0002] The operation of the permanent magnet brushless DC motor is realized by changing the different trigger combination states of the inverter power device correspondingly with the different positions of the rotor. Therefore, it is the key to control the normal operation of the brushless DC motor to accurately detect the position of the rotor and switch the trigger combination state of the power device on time according to the rotor position. It is the most direct and effective method to use the position sensor as the position detection device of the rotor. The position sensor is one of the components of the brushless DC motor system. Its function is to detect the position of the rotor during motion, convert the position signal of the magnetic pole of the rotor magnet into an electrical signal, and provide correct commutation information for the logic switch circuit. To...

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