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Motor vector control method and device, and terminal device

A vector control and control module technology, applied in vector control systems, motor generator control, control of electromechanical transmissions, etc., can solve problems such as current sensor failure, inaccurate current detection, poor user experience, etc., to improve user experience. , the effect of improving safety and reliability

Active Publication Date: 2017-12-29
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In actual motor control, the current sensor that detects the three-phase AC current value may fail, resulting in inaccurate current detection
In the prior art, when at least one current sensor failure is determined, immediate shutdown measures are taken, which may lead to serious accidents, poor safety and reliability, and poor user experience

Method used

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  • Motor vector control method and device, and terminal device
  • Motor vector control method and device, and terminal device
  • Motor vector control method and device, and terminal device

Examples

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Embodiment Construction

[0021] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.

[0022] The motor vector control method, device and terminal equipment according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0023] Various embodiments of the present invention are aimed at the existing motor control method. When it is determined that at least one current sensor that detects the three-phase AC current value is faulty, resulting in inaccurate current detection, immediate shutdown measures are taken, which may lead to serious accidents. Safet...

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PUM

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Abstract

The present invention provides a motor vector control method and device, and a terminal device. The method comprises: obtaining the three-phase test current values of a motor; determining whether the sum of the three-phase test current values is smaller than a first threshold or not; if the sum of the three-phase test current values is not smaller than the first threshold, respectively determining the calculation current value of another phase according to any two phase test current values; performing conversion of coordinates of any two test current values and the another calculation current value, and determining a direct-axis current value set and a quadrature-axis current value set of the motor in a rotating coordinate system; according to the direct-axis current value set and the quadrature-axis current value set, determining whether the quantity of fault current sensors in the motor is 1 or not; and if the quantity of fault current sensors in the motor is 1, performing vector control of the motor according to the current value output by non-fault current sensors. Therefore, the vector control of the motor is performed when one current sensor has faults so as to avoid generation of accidents caused by immediately shutting down a device when one current sensor has faults, improve the safety and reliability of motor control and improve the user experience.

Description

technical field [0001] The present application relates to the technical field of motor control, in particular to a motor vector control method, device and terminal equipment. Background technique [0002] The existing motor control technology generally adopts the vector control algorithm. The technical point is to use three current sensors to detect the value of the three-phase AC current, and then perform coordinate transformation to obtain the direct-axis current component and the quadrature-axis current component, and then perform PI adjustment according to the deviation between the actual current component and the expected current component to complete the current The closed-loop control of the motor finally realizes the precise control of the motor. [0003] In actual motor control, the current sensor that detects the three-phase AC current value may fail, resulting in inaccurate current detection. In the prior art, when at least one current sensor is determined to be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22
CPCH02P21/22
Inventor 钟彬刘玉辉
Owner BEIJING ELECTRIC VEHICLE