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Power-down protection control method and control module

A control method and power-down protection technology, applied in the direction of motor control, control system, electrical components, etc., can solve problems such as overvoltage damage of DC bus module

Active Publication Date: 2020-03-27
GUANGDONG WELLING ELECTRIC MACHINE MFG +1
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  • Abstract
  • Description
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Problems solved by technology

[0002] When the permanent magnet synchronous motor is running at high speed and enters the state of field weakening, if there is a power failure on the AC power supply side, the permanent magnet synchronous motor will generate a large counter electromotive force, and through the IPM module (Intelligent Power Module, intelligent power module, is the control The core component of the permanent magnet synchronous motor) directly charges the DC bus module used for power supply, which may cause overvoltage damage to the DC bus module

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  • Power-down protection control method and control module

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[0039] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0040] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0041] The embodiment of the first aspect of the present invention provides a power-down protection control method for a permanent magnet synchronous motor control system. The permanent magnet synchr...

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Abstract

The invention provides a power-down protection control method for a permanent magnet synchronous motor control system, a control module, a computer readable storage medium and the permanent magnet synchronous motor control system. The power-down protection control method comprises the following steps: counting a voltage value of a direct-current bus module in real time; judging whether power failure occurs or not according to the voltage value; and when power failure is judged, entering a constant-pressure braking mode to control the permanent magnet synchronous motor to decelerate and brake according to a preset acceleration so as to enable the voltage value to be smaller than or equal to a first preset voltage value. According to the power-down protection control method, the permanent magnet synchronous motor is controlled to decelerate and brake according to a preset acceleration through constant-pressure braking; the deceleration speed of the permanent magnet synchronous motor canbe reduced, so that the voltage formed by the counter electromotive force instantaneously generated by the permanent magnet synchronous motor on the direct current bus module is lower than the safetyvoltage, and the counter electromotive force generated by the permanent magnet synchronous motor due to power failure is prevented from forming higher voltage on the direct current bus module to damage components.

Description

technical field [0001] The present invention relates to the field of motor control, in particular, to a power-down protection control method for a permanent magnet synchronous motor control system, a control module, a computer-readable storage medium, and a permanent magnet synchronous motor control system . Background technique [0002] When the permanent magnet synchronous motor is running at high speed and enters the state of field weakening, if there is a power failure on the AC power supply side, the permanent magnet synchronous motor will generate a large counter electromotive force, and through the IPM module (Intelligent Power Module, intelligent power module, is the control The core component of the permanent magnet synchronous motor) directly charges the DC bus module used for power supply, which may cause overvoltage damage to the DC bus module. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P29/02H02P29/028G01R19/165
CPCH02P29/02H02P29/028G01R19/165
Inventor 程云峰
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG
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