Electric automobile controller

Abstract

The invention discloses an electric automobile controller, which comprises a signal input module, a pulse width modulation module, a main control module, a field-effect tube, a voltage acquisition module and a motor current computation module, wherein the signal input module is used for receiving a user command; the pulse width modulation module is used for outputting square waves for driving a motor; the main control module is used for controlling the output of the pulse width modulation module according to a received signal; the drain of the field-effect tube is connected with the motor, a source is grounded and a grid receives the square waves output by the pulse width modulation module; the field-effect tube works in a linear working region; the voltage acquisition module is used for acquiring the voltage between the drain and the source of the field-effect tube; and the motor current computation module is used for computing a motor current according to the voltage acquired by thevoltage acquisition module and the output characteristic of the field-effect tube and feeding the computed motor current back to the main control module. The electric automobile controller can ensurethat an electric automobile works in a stable and smooth traveling state at any time and is safe and reliable.

Description

technical field [0001] The invention relates to an electric vehicle power system, in particular to an electric vehicle controller. Background technique [0002] For the purpose of environmental protection, the application of electric vehicles is becoming more and more widespread. Because the motor has good traction characteristics, the transmission system of electric vehicles does not need clutches and transmissions, and the speed control can be realized by the controller changing the speed of the motor through the speed regulating system. Existing electric vehicle controllers can only open-loop control the traction motor of the vehicle, and cannot make real-time and effective adjustments to the motor according to road surface changes, load changes, and wind resistance changes to ensure that the vehicle is always in a smooth and smooth driving state. Therefore, it is urgent to provide an improved electric vehicle controller to overcome the above defects. Contents of the i...

AI Technical Summary

Problems solved by technology

Existing electric vehicle controllers can only open-loop control the traction motor of the vehicle, and cannot make real-time and effective adjustments to the motor according to changes in road surface, load and wind resistance to ensure that the vehicle is always in a stable and smooth driving state

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