Method, device, storage medium and motor for suppressing bus voltage harmonics

Abstract

The invention discloses a bus-bar voltage harmonic suppression method, a bus-bar voltage harmonic suppression device, a storage medium and a motor. The method comprises the following steps that: the voltage difference value of the absolute value of an alternating-current power source voltage and the bus-bar voltage of the motor is obtained; whether the voltage difference value is equal to a set voltage value or not is determined; if the voltage difference value is not equal to the set voltage value, the current power factor of the motor is corrected, so that a corrected power factor is obtained; and the bus-bar current of the motor is controlled according to the corrected power factor, so that the bus-bar voltage harmonic of the motor can be suppressed. With the method of the invention adopted, the problem that the bus-bar voltage harmonic of a permanent magnet synchronous motor driving system of which the bus is provided with no electrolytic capacitors is large can be solved, and thebus-bar voltage harmonic can be suppressed.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a bus voltage harmonic suppression method, device, storage medium and motor, and in particular to a bus voltage harmonic suppression method and device for a permanent magnet synchronous motor drive system without an electrolytic capacitor on the bus , storage media and motors. Background technique [0002] In the field of household appliances such as refrigerators, air conditioners, and fans, it is a gradual development trend to improve system reliability, improve power factor, and reduce costs. In the traditional permanent magnet synchronous motor drive system, the bus capacitor adopts large electrolytic capacitors, which have the disadvantages of short service life and large volume; while film capacitors have the advantages of long service life and small size, so in the motor drive system Replacing large electrolytic capacitors with film capacitors can improve the d...

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Problems solved by technology

[0004] The object of the present invention is to, aiming at the above defects, provide a method, device, storage medium and motor for suppressing bus voltage harmonics, so as to solve the problem that the bus voltage harmonics of the permanent magnet synchronous motor drive system without electrolytic capacitors in the bus are large, To achieve the effect of suppressing the harmonics of the bus voltage

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