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Zero point deviation detection method and device for permanent magnet synchronous motor, equipment and automobile

A permanent magnet synchronous motor and zero-point deviation technology, applied in the automotive field, can solve the problems of immaturity and low efficiency of zero-point deviation fault detection of permanent magnet synchronous motors

Active Publication Date: 2021-09-14
BEIJING ELECTRIC VEHICLE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a permanent magnet synchronous motor zero point deviation detection method, device, equipment and automobile to solve the problem of low efficiency and immaturity in the detection of zero point deviation faults of permanent magnet synchronous motors

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  • Zero point deviation detection method and device for permanent magnet synchronous motor, equipment and automobile
  • Zero point deviation detection method and device for permanent magnet synchronous motor, equipment and automobile
  • Zero point deviation detection method and device for permanent magnet synchronous motor, equipment and automobile

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Embodiment Construction

[0060] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying 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.

[0061] 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 include...

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Abstract

The invention provides a zero point deviation detection method and device for a permanent magnet synchronous motor, equipment and an automobile. The method comprises the following steps: acquiring a current driving motor rotating speed signal, and judging whether the current driving motor rotating speed signal is in a driving motor low-rotating-speed working condition; if the motor is in a low-rotating-speed working condition, estimating output torques of two different driving motors by using two methods respectively; calculating an output torque estimation deviation coefficient according to the output torque of the two different driving motors; re-judging whether the driving motor rotating speed signal is in a driving motor high rotating speed working condition; if the driving motor is in the high-rotating-speed working condition, filtering the rotating speed of the driving motor, and calculating a rotating speed fluctuation zero-point deviation coefficient; and calculating a motor zero-point deviation severity coefficient according to the two deviation coefficients, and performing motor fault judgment according to the motor zero-point deviation severity coefficient. According to the method of the invention, the dynamic detection of the zero deviation fault of the permanent magnet synchronous motor is realized, and the after-sales guarantee is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method, device, equipment and automobile for detecting the zero point deviation of a permanent magnet synchronous motor. Background technique [0002] In the field of pure electric vehicles, permanent magnet synchronous motor (PMSM) has become the mainstream of pure electric vehicle drive system due to its advantages of high efficiency, high output torque, high power density and good dynamic performance. For pure electric vehicles with permanent magnet synchronous motors as the power core, accurate detection of rotor rotation position is the premise of high-precision control, and accurate zero point position is the basis for accurate detection of rotor rotation position. The permanent magnet synchronous motor adopts electronic commutation, so the position information of the rotor directly affects the speed of the motor, the accuracy of position control and the dynamic perfo...

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Application Information

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IPC IPC(8): B60L3/00
CPCB60L3/0061B60L2240/421B60L2240/423Y02T10/72
Inventor 李玮梁海强
Owner BEIJING ELECTRIC VEHICLE
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