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Method and system for power steering of electric vehicle
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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
Inactive Publication Date: 2019-07-16
JIANGXI JIANGLING GRP NEW ENERGY AUTOMOBILE CO LTD
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[0006] The invention provides a method and system for power steering of an electric vehicle to solve the problem of unnecessary power loss in the prior art
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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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Abstract
The invention provides a method and system for power steering of an electric vehicle, relates to the field of electric vehicles, and is used to solve the problem of unnecessary power loss in the prior art. The method includes: the electric vehicle is in a ready state; the microprogram controller provides a speed bias signal of a preset speed to the electric powersteering system; after the motor of the electric car starts to work, the actual speed of the motor is within the preset speed When the electric vehicle is decelerating in a single stage during driving, the electric powersteering system completes the speed-dependent control. The system includes: an electric powersteering system, a microprogram controller, an electric vehicle motor and a power supply respectively connected with the electric power steeringsystem. The method and system of the electric vehicle power steering of the present invention realize the speed-dependent control of the EPS system of the electric vehicle without changing the design of any mechanical parts, adjusting the system startup mode and the internal program, and shorten the development cycle of the steering system and the whole vehicle .
Description
[0001] 【Technical Field】 [0002] The invention relates to the field of electric vehicles, in particular to a method and system for power steering of electric vehicles. [0003] 【Background technique】 [0004] The EPS system (Electronic Power Steering, electric power steering system) used in traditional cars only enters the working mode when the ECU (Electronic Control Unit, electronic control unit, that is, the trip computer) receives the engine idling signal. It can be used when the engine is idling. Realize the assist function when standing still. When the electric vehicle is stationary, the main motor does not work and there is no idle speed output. Generally, a signal is sent to the EPS controller when the key is turned on. At this time, the EPS system enters the working mode, but this method will cause unnecessary Power loss. [0005] [Content of the invention] [0006] The present invention provides a power steering method and system for an electric vehicle to solve the problem...
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Application Information
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Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/04B62D6/00B62D137/00
CPCB62D5/046B62D6/001
Inventor 姜筱华白俊涛郑健强
Owner JIANGXI JIANGLING GRP NEW ENERGY AUTOMOBILE CO LTD
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