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Control method and system for distributed drive electric vehicle in motor failure state

An electric vehicle, failure state technology, applied in the field of vehicle control, can solve problems such as driving experience deviation, no fault-tolerant control method, affecting driving, etc.

Active Publication Date: 2021-02-02
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme is mainly aimed at the dual-motor distributed drive scheme. If this method is used to control the four-wheel hub motor distributed drive electric vehicle, the power of the vehicle will be greatly limited, and due to the intervention of the power steering motor when turning It will cause the driver's driving experience to deviate from the usual driving habits, thus affecting driving
Therefore, this method is not suitable for four-hub / wheel-side motor-driven distributed drive electric vehicles, and there is no fault-tolerant control method for the drive motor failure state of the above-mentioned four-wheel-hub / wheel-side motor-driven electric vehicles

Method used

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  • Control method and system for distributed drive electric vehicle in motor failure state
  • Control method and system for distributed drive electric vehicle in motor failure state
  • Control method and system for distributed drive electric vehicle in motor failure state

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Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0051] The present invention is mainly aimed at performing corresponding control when the drive motor of the four-wheel hub motor / wheel side motor drives the vehicle fails, which is finally realized by reconstructi...

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Abstract

The invention discloses a control method and system for distributedly driving an electric vehicle in a motor failure state. The control method includes: obtaining the failure condition of the drive motor of the distributed drive electric vehicle; when the failure condition of the drive motor is an uncontrollable failure, determining that the torque signals of all the drive motors are zero; when the failure condition of the drive motor is a single motor failure or When the dual motors on the opposite side fail, the vehicle parameters of the distributed drive electric vehicle are obtained; the vehicle parameters include the steering wheel angle of the vehicle, the vehicle speed and the actual yaw rate of the vehicle; according to the failure of the drive motor and the vehicle parameters, the torque signal of each drive motor is determined; The torque of each drive motor of the distributed drive electric vehicle is adjusted according to the torque signal of each drive motor. The invention can realize the control of the electric vehicle driven by the distributed drive of the four-wheel hub motors in the motor failure state, so as to ensure the stability of the vehicle without affecting the driving of the driver.

Description

technical field [0001] The invention relates to the field of vehicle control, in particular to a control method and system for a distributed drive electric vehicle in a motor failure state. Background technique [0002] Distributed drive electric vehicle means that two or more drive motors are equipped on the vehicle, and each drive motor transmits power to the corresponding drive wheel through a certain path. Therefore, current distributed drive electric vehicles are mainly composed of two configurations: a dual-motor drive configuration and a four-motor drive configuration, and the drive motor failure involved in this application is mainly aimed at the four-wheel hub / wheel-side motor drive configuration. [0003] When the drive motor fails, the motor torque is redistributed through the corresponding torque reconstruction method to ensure the vehicle's power and yaw stability. At present, the closest control method is dual-motor drive distributed drive vehicle limp control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/32B60L15/38B60L15/20
CPCB60L15/20B60L15/32B60L15/38Y02T10/72
Inventor 张雷王震坡余文
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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