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Method, device and system for deceleration control of permanent magnet synchronous motor

A permanent magnet synchronous motor, deceleration control technology, applied in the control system, single motor speed/torque control, vector control system, etc., can solve the problems of device overvoltage, damage, DC bus voltage rise, etc. The effect of avoiding damage to the device due to overvoltage

Active Publication Date: 2022-07-22
GUANGDONG WELLING ELECTRIC MACHINE MFG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the permanent magnet synchronous motor control system, braking control means that the permanent magnet synchronous motor enters the power generation state, that is, the device is charged directly through the DC bus, which may cause the voltage of the DC bus to rise rapidly, causing the device to be overvoltage and damaged

Method used

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  • Method, device and system for deceleration control of permanent magnet synchronous motor
  • Method, device and system for deceleration control of permanent magnet synchronous motor
  • Method, device and system for deceleration control of permanent magnet synchronous motor

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Embodiment Construction

[0030] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

[0031] The deceleration control method, device and system of the permanent magnet synchronous motor according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0032] figure 1 It is a flowchart of a deceleration control method for a permanent magnet synchronous motor according to an embodiment of the present invention. like figure 1 As shown, the deceleration control method of the permanent magnet synchronous motor accord...

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Abstract

The invention discloses a deceleration control method, device and system of a permanent magnet synchronous motor. The deceleration control method includes the following steps: acquiring the DC bus voltage of the permanent magnet synchronous motor; calculating the difference between a preset voltage and the DC bus voltage Difference; confirm that the deceleration command is received, and control the q-axis current of the permanent magnet synchronous motor according to the difference. According to the deceleration control method of the present invention, rapid deceleration can be achieved, and the phenomenon of device overvoltage and damage can be effectively avoided.

Description

technical field [0001] The present invention relates to the technical field of electric motors, in particular to a deceleration control method, device and system of a permanent magnet synchronous motor. Background technique [0002] When the permanent magnet synchronous motor is running, acceleration and deceleration operation is a common condition. During deceleration operation, to achieve the purpose of rapid deceleration, it is necessary to generate braking torque through braking control. However, in the permanent magnet synchronous motor control system, braking control means that the permanent magnet synchronous motor enters the power generation state, that is, the device is directly charged through the DC bus, which may cause the voltage of the DC bus to rise rapidly, causing the device to be damaged by overvoltage. . [0003] Therefore, how to control the rapid deceleration of the permanent magnet synchronous motor without causing damage to the device due to overvolt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14H02P21/22H02P25/022H02P6/08H02P6/30
CPCH02P6/08H02P6/30
Inventor 程云峰
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG