Self-adaptation noise reduction method and system of motor

An adaptive and current technology, applied in control systems, control generators, vector control systems, etc., can solve problems such as inability to suppress noise and poor flexibility

Active Publication Date: 2015-08-26
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

This processing method in the prior art has poor flexibility and cannot adapt...

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  • Self-adaptation noise reduction method and system of motor
  • Self-adaptation noise reduction method and system of motor
  • Self-adaptation noise reduction method and system of motor

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Embodiment Construction

[0072] 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.

[0073] Such as figure 1 As shown, it is an adaptive noise reduction method for a motor disclosed in an embodiment of the present invention, including:

[0074] S101, collecting the noise signal of the motor;

[0075] During the operation of the motor, the noise signal generated by the motor during the working process is collected in real time.

[0076] S102. Perform sound pressure spectrum analysis on the noise signal to obtain two harmonics with the largest...

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Abstract

The invention discloses a self-adaptation noise reduction method. The self-adaptation noise reduction method comprises the steps of acquiring noise signals of a motor; carrying out sound pressure spectrum analysis on the noise signals so as to obtain two harmonic waves with maximal amplitude values; carrying out harmonic wave calculation on the two harmonic waves with the maximal amplitude values of the noise signals, and outputting a direct-axis harmonic wave voltage component and a quadrature-axis harmonic wave voltage component of the motor; acquiring a direct-axis voltage component and a quadrature-axis voltage component of the motor; and adding the direct-axis harmonic wave voltage component and a quadrature-axis harmonic wave voltage component of the motor with the direct-axis voltage component and the quadrature-axis voltage component of the motor, then carrying out Parker inverse transformation, outputting the required phase voltage component of the motor, and carrying out self-adaptation inhibition on the noise generated by the motor in real time. The invention also discloses the self-adaptation noise reduction system of the motor.

Description

technical field [0001] The invention relates to the technical field of motor electric transmission, in particular to an adaptive noise reduction method and system for a motor. Background technique [0002] At present, most motors are powered by frequency converters. The power supply frequency and amplitude of the motor are changed through the frequency converter, and then the moving magnetic field period of the motor is changed, which plays a role in smoothly controlling the motor speed. However, using a frequency converter to supply power to the motor, due to the high-order harmonics of the frequency converter, the noise of the motor is more obvious, causing certain pollution to the environment, and at the same time reducing the performance of the motor. In order to reduce the noise of the motor, in the prior art, the noise of the motor is reduced to a certain extent mainly by performing fixed processing on the high-order harmonics of the frequency converter. This processi...

Claims

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Application Information

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IPC IPC(8): H02P21/14
Inventor 钱强李进宋泽琳郭清风米雪涛
Owner GREE ELECTRIC APPLIANCES INC
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