Method and system for power steering of electric vehicle
A technology of electric power steering and electric vehicles, which is applied in the direction of electric steering mechanism, power steering mechanism, automatic steering control components, etc., can solve problems such as power loss, and achieve the effect of shortening the development cycle
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Embodiment 1
[0018] Embodiment 1. A power steering method of an electric vehicle in this embodiment, see figure 1 As shown, including the following steps:
[0019] S11. The electric vehicle is in a ready state. Specifically, after the motor controller of the electric vehicle is ready, the actual speed of the motor is zero.
[0020] S12. The MCU provides a speed bias signal of a preset speed to the EPS. Specifically, the MCU simulates a 780r / min speed bias signal and outputs it to the EPS.
[0021] S13. After the motor of the electric vehicle starts to work, the actual rotation speed of the motor is accumulated on the basis of the preset rotation speed. That is, 780r / min + the current speed of the motor is taken as the actual speed of the motor.
[0022] S14. When the electric vehicle is decelerating in a single stage during driving, the EPS completes the speed control. That is, when the electric vehicle is single-stage deceleration, the motor speed is the vehicle speed, and the EPS speed-depend...
Embodiment 2
[0023] Embodiment 2. An electric vehicle power steering system of this embodiment, see figure 2 As shown, it includes: EPS21, and MCU22, electric vehicle motor 23 and power supply 24 respectively connected to EPS 21;
[0024] The MCU22, when the electric vehicle is in a ready state, is used to provide a speed bias signal of a preset speed to the EPS21. Specifically, the MCU22 can simulate a speed bias signal of 780r / min and output it to the EPS21.
[0025] After the electric vehicle motor 23 starts to work, the actual rotation speed of the electric vehicle motor 23 is accumulated on the basis of the preset rotation speed. That is, 780r / min + the current speed of the motor is taken as the actual speed of the motor.
[0026] When EPS21 is in single-stage deceleration during driving, it completes the following speed control. That is, when the electric vehicle is a single-stage deceleration, the motor speed is the vehicle speed, and the EPS21 speed-dependent control is realized.
[002...
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