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Noise reduction method for high-speed DC brushless motor

A brushless DC motor and noise reduction technology, which is applied in the direction of speed/torque control of a single motor, can solve problems such as bad experience and harsh noise, and achieve a good experience experience

Inactive Publication Date: 2018-08-17
DONGGUAN LIHUI MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

It operates under high-speed and no-load conditions, and the cooperation between the cup shaft and the motor adapter is prone to vibration or resonance, and the noise is particularly harsh, which brings bad experience to users

Method used

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  • Noise reduction method for high-speed DC brushless motor

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Embodiment Construction

[0018] In order to make the object, technical solution and technical effect of the present invention clearer, the present invention will be further described below in conjunction with specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] The noise reduction method of the high-speed DC brushless motor is used in motors that need noise reduction. In the original no-load condition, an adaptive software algorithm is used to automatically reduce noise, bringing a good experience to users.

[0020] Such as figure 1 As shown, a noise reduction method for a high-speed brushless DC motor, including the following steps:

[0021] 1) Set the motor target speed to be 4000RPM. After starting the motor, wait for the motor to run smoothly; set speed sensors at multiple positions of the motor;

[0022] 2) After the motor is running normally, the signal detected by...

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Abstract

The invention discloses a noise reduction method for a high-speed DC brushless motor, and the method employs a software algorithm for automatically reducing a rotating speed under the idle condition,thereby achieving the purpose of noise reduction. When there is a load, the normal work rotating speed can be automatically recovered. The working principle is that a central control module sets the rotating speed for closed-loop operation when a start key is pressed; an actual working current under the condition of a target rotating speed is detected through a data collection port; the motor is judged to work in a no-load state if the actual working current is less than a set no-load value, and a central control module controls the motor to remain at speed of 4000r; the motor is judged to have a load if the working current is greater than the set no-load value, and the central control module controls the motor to increase the rotating speed for operation. The method can be used for reducing noise in the non-load state to a certain degree, and enables the experience of the user to be good.

Description

technical field [0001] The present invention relates to the technical field of motors, in particular to a noise reduction method for high-speed DC motors. Background technique [0002] The brushless DC motor consists of a motor body and a driver, and is a typical mechatronic product. A brushless motor refers to a motor without a brush and a commutator (or slip ring), also known as a commutator-less motor. As early as the 19th century, when the motor was born, the practical motor produced was a brushless form, that is, an AC squirrel-cage asynchronous motor, which was widely used. However, asynchronous motors have many insurmountable defects, so that the development of motor technology is slow. Transistors were born in the middle of the last century, so brushless DC motors that use transistor commutation circuits instead of brushes and commutators came into being. [0003] DC brushless motor has the characteristics of high efficiency, long life, energy saving and environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08
CPCH02P6/08
Inventor 潘益和陈刚易恭才
Owner DONGGUAN LIHUI MOTOR CO LTD
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