Rotary transformer type steering angle sensor of electric automobile and detection method thereof

Abstract

The invention discloses a rotary transformer type steering angle sensor of an electric automobile. The rotary transformer type steering angle sensor comprises a rotary transformer, a resolver signal decoder, a microprocessor and a signal conditioning circuit. A voltage output end of the rotary transformer is electrically connected with the microprocessor through the resolver signal decoder, a voltage input end of the rotary transformer is electrically connected with an excitation regulator producing exciting voltage, an input end of the of the excitation regulator is electrically connected with a driver, and an output end of a resolver digital converter is connected with the driver. The invention further discloses a method for detecting the steering angle of a steering wheel by using the rotary transformer type steering angle sensor. According to the method, when a steering engine of the steering wheel rotates, a rotating shaft of the steering engine drives a rotor of the rotary transformer to shift synchronously, voltage changed correspondingly can be produced on a stator winding of the rotary transformer, data decoding is carried out on a voltage signal through the resolver decoder, then the voltage signal is transmitted to the microprocessor, a collected angle signal is transmitted to an automobile control system to adjust the torque output ratio between two wheels of a rear axle, and therefore stable steering of vehicles can be achieved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a resolver-type steering angle sensor of an electric automobile and a detection method thereof. Background technique [0002] In the wheel drive electric bus, a drive motor is placed on the left and right rear axle sides respectively to realize the direct drive of the two rear wheels. The electric bus using the wheel drive system can make the frame near the wheels very low, so that the space can be effectively used, and it has the advantages of reducing the weight of the vehicle, but it also brings the electronic differential speed and braking force of the wheel drive axle. control, traction control, wheel drive safety and other new technical challenges. When the vehicle is turning, the output torque distribution of the left and right rear axles is distributed according to the current steering angle, vehicle speed and other factors. Therefore, the steering wheel angle sensor...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems existing in the existing steering angle sensor, the present invention provides a resolver-type steering angle sensor of an electric vehicle and its detection method, which is used to detect the steering wheel steering angle of the wheel-driven electric passenger car, so that the vehicle can Adjust the torque output ratio between the two wheels of the rear axle according to the steering angle of the steering wheel to achieve smooth steering of the vehicle

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