Steering motor control method, steering motor controller, vehicle and storage medium
A technology of steering motor and control method, applied in steering mechanism, electric steering mechanism, power steering mechanism, etc., can solve problems such as poor applicability, heat generation, damage, etc., and achieve the effect of avoiding hidden dangers of vehicle safety and fast discharge speed.
Active Publication Date: 2021-10-01
BYD CO LTD
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Problems solved by technology
However, when the high-voltage system suddenly loses power, the oil returns to drive the steering oil pump to rotate, and different back electromotive forces will be generated according to the type of motor and the reverse speed of the oil pump. transformer) causing damage to
[0004] In view of the above problems, in the related art, the pre-charging resistor is used to discharge the capacitance inside the steering motor controller and the back electromotive force generated by the motor. However, using the pre-charging resistor to discharge the voltage and control the current will inevitably generate heat. When the power is turned on and off for the first time, it is very easy to cause the pre-charging resistor to overheat and burn out, which has poor applicability
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[0051] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.
[0052] Such as figure 1 As shown, a power-off protection method for a hybrid motor controller is adopted in the related art, which includes the following steps: first step, the initial state of the instrument: the first switch K1, the second switch K2, and the third switch K3 are all disconnected; The second step, the power-on process and control: first connect and control the weak current, then close the No. 2 switch K2 to charge the capacitor in the motor controller, and then close the No. 1 switch K1 after the energy storage capacitor in the steering motor controller is fully charged , and turn off the No. 2 switch K2 to complete the power-on process; the...
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The invention relates to a steering motor control method, a steering motor controller, a vehicle and a storage medium. The method comprises the steps that when a high-voltage system is normally powered off, the steering power of a steering motor is controlled to be continuously reduced according to a preset rule, and after the high-voltage system is normally powered off, the steering motor continues to work under driving of an energy storage capacitor in a steering motor controller; if the steering motor rotates forwards and the rotating speed is larger than a preset rotating speed threshold value, whether the current voltage of the energy storage capacitor is smaller than a preset voltage threshold value or not is determined; if the current voltage is smaller than the preset voltage threshold value, a three-phase contactor is controlled to be disconnected. Therefore, active voltage discharge is carried out on the energy storage capacitor in the steering motor controller by utilizing the steering motor, and the discharge speed is high, so that the problem that a pre-charging resistor is overheated and burnt due to repeated voltage discharge by utilizing the pre-charging resistor in the related technology is avoided. After the high-voltage system is normally powered off, the steering motor continues to work, and therefore vehicle potential safety hazards caused by the fact that a user difficultly rotates a steering wheel are avoided.
Description
technical field [0001] The present disclosure relates to the field of vehicle control, and in particular, to a steering motor control method, a steering motor controller, a vehicle, and a storage medium. Background technique [0002] At present, most of the electrohydraulic power steering (Electronic Hydrostatic Power Steering, EHPS) systems of pure electric vehicles or hybrid vehicles are powered by high-voltage systems, which directly provide electric energy for the steering motor controller, and then the steering motor controller drives the steering motor to work , so as to achieve the purpose of turning. [0003] The EHPS system is an electronic power steering system that relies on an electric motor to drive a hydraulic pump (that is, an oil pump) to supply power steering. Its main feature is to convert the speed output into oil pressure, so that the oil pressure acts on the rack and pinion to generate power to achieve the purpose of turning the tires. Among them, in t...
Claims
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IPC IPC(8): B62D5/04
CPCB62D5/046B62D5/0487
Inventor 刘美忠马爱国武云龙张涛赵萍
Owner BYD CO LTD