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A control method, device, system and vehicle for motor thermal protection

A control method and motor controller technology, applied in control systems, motor control, electrical devices, etc., can solve problems such as reducing system power assistance, sacrificing driving comfort, and failing to meet safety level requirements, so as to avoid system power assistance The effect of reducing and ensuring driving comfort

Active Publication Date: 2021-07-20
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above two control strategies are at the cost of sacrificing driving comfort, that is, reducing the power of the system to protect the EPS system from overheating
Moreover, with the application of advanced functions of the EPS system, the power of the motor is increasing day by day. The above two control strategies cannot meet the requirements of the growing EPS system for higher safety levels.

Method used

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  • A control method, device, system and vehicle for motor thermal protection
  • A control method, device, system and vehicle for motor thermal protection
  • A control method, device, system and vehicle for motor thermal protection

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Embodiment Construction

[0050] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments. In the following description, specific details, such as specific configurations and components, are provided only to assist in a comprehensive understanding of the embodiments of the present invention. Accordingly, those of ordinary skill in the art should recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0051] It should be understood that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of t...

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PUM

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Abstract

Embodiments of the present invention provide a control method, device, system and vehicle for motor thermal protection, wherein the control method applied to the motor controller includes: The current value or the first temperature value is used to preprocess the motor drive circuit; according to the obtained heat integral information of each drive circuit in the motor drive circuit, the output current of one drive circuit in the motor drive circuit is alternately controlled to switch to cooling current, and control another drive circuit to switch to the average output current; when the motor is determined to be in an overheated state according to the heat integral information, control the output current of each drive circuit to switch to the cooling current. The technical scheme of the present invention, while delaying the overheating state of the motor, ensures that the motor has a certain output torque, avoids the situation of reducing the power assist of the system in the prior art, and is beneficial to ensure the driving comfort of the user.

Description

technical field [0001] The invention relates to the technical field of motor thermal protection, in particular to a control method, device, system and vehicle for motor thermal protection. Background technique [0002] At present, the degree of electrification of automobiles is getting higher and higher, especially in electric vehicles, most systems need to be driven by electric motors. However, the motor is prone to overheating during operation. If the overheating protection module is not installed or the overheating protection strategy is unreasonable, the motor is prone to overheating. Motor overheating is a comprehensive manifestation of motor failure and an important cause of motor damage. It will not only shorten the service life of the motor, but also affect the normal operation of the motor. In severe cases, it will cause safety accidents (such as power motors, EPS (electric power steering system , Electric Power Steering) motors and other motors related to the safe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P29/60
CPCB60L3/0061B60L15/28H02P29/032Y02T10/64Y02T10/72
Inventor 丁皓阳
Owner BEIJING ELECTRIC VEHICLE
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