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Control method, control device and controller

A control method and technology of a control device, applied in the control system, motor control, electrical components, etc., can solve problems such as damage and motor overheating, and achieve the effect of avoiding abnormal work or damage

Pending Publication Date: 2021-04-30
HANGZHOU XIANTU ELECTRONICS
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Problems solved by technology

However, in some areas where the moment of inertia of the motor is small (such as fans, water pumps, etc.), when the motor is blocked, the estimated speed of the motor may be within the preset speed range. At this time, the motor out-of-step protection will not be performed. , it is easy to cause the motor to overheat and damage

Method used

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  • Control method, control device and controller
  • Control method, control device and controller

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] The embodiment of the present invention provides a control method for controlling the motor. Specifically, when the motor is locked, the out-of-step protection control of the motor is performed. The control method is applied to the motor controller. Refer to figure 1 , the control method for motor out-of-step protection control may include:

[0050] S11. Detecting the motor speed.

[0051] S12. When the motor speed is greater than the preset speed thre...

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Abstract

The invention provides a control method, a control device and a controller. The method comprises the following steps: detecting the rotating speed of a motor, calculating the driving voltage and the theoretical counter electromotive force of the motor when the rotating speed of the motor is greater than a preset rotating speed threshold value, calculating a counter electromotive force correction value according to the theoretical counter electromotive force, judging whether the driving voltage is smaller than the counter electromotive force correction value or not, and if so, performing motor out-of-step protection. According to the invention, when the driving voltage is smaller than the back electromotive force correction value, the motor out-of-step protection is carried out, and the motor can be effectively prevented from working abnormally or being damaged.

Description

technical field [0001] The invention relates to the technical field of motor control, and more specifically, relates to a control method, a control device and a controller for motor out-of-step protection. Background technique [0002] In recent years, with the continuous improvement of energy-saving requirements, the requirements for motors are increasing. The inventors found that the motor may be out of step during the operation of the motor; in order to protect the motor out of step, it is necessary to judge the out of step; one of the judgment methods is as follows: check whether the estimated speed of the motor is much greater than the maximum value within the preset speed range, Or much less than the minimum value within the preset speed range. However, in some areas where the moment of inertia of the motor is small (such as fans, water pumps, etc.), when the motor is blocked, the estimated speed of the motor may be within the preset speed range. At this time, the mot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P29/10
CPCH02P29/10
Inventor 蒋德凯
Owner HANGZHOU XIANTU ELECTRONICS
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