Frequency converter control method and device, electronic equipment and storage medium

Abstract

The invention provides a frequency converter control method and device, electronic equipment and a storage medium. The method comprises the steps of: obtaining a zero vector adjustment proportionality coefficient of a frequency converter; correcting the zero vector adjustment proportionality coefficient to obtain a target zero vector adjustment proportionality coefficient; obtaining at least one target vector and action time of the target vector from a pulse width modulation vector space, and splitting the action time of the target vector into at least two sub-action times; and obtaining the action time of each switching device of the frequency converter according to the target zero vector adjustment proportionality coefficient and all the sub-action times. By optimizing a modulation vector sequence, the amplitude of high-frequency current ripples caused by high-frequency carrier waves is remarkably reduced, the problem of vibration noise caused by high-frequency torque pulsation generated by the high-frequency current ripples is solved; and the zero vector adjustment proportionality coefficient is corrected, torque harmonics are optimized, the high-frequency vibration noise of the system is improved, and therefore, the overall performance of the frequency converter is improved.

Description

technical field [0001] The present application relates to the technical field of automatic control, in particular to a frequency converter control method, device, electronic equipment and storage medium. Background technique [0002] At present, permanent magnet synchronous motor (Permanent Magnetic Synchronous Machine, referred to as PMSM) is widely used in various drive control occasions requiring high performance due to its advantages of high efficiency, low vibration and noise, and wide speed range. However, due to the distortion of the motor air gap magnetic field and the nonlinearity of the IGBT drive module, the motor current contains a large number of high-order harmonics, which can easily cause the motor to heat up and increase high-frequency noise. In particular, when the IGBT drive module uses a fixed switching frequency during the entire motor drive process, the high-order harmonics will be concentrated in a fixed frequency range and have a large spectrum peak, r...

AI Technical Summary

Problems solved by technology

However, due to the distortion of the motor air gap magnetic field and the nonlinearity of the IGBT drive module, the motor current contains a large number of high-order harmonics, which can easily cause the motor to heat up, thereby increasing the high-frequency noise

In particular, when the IGBT drive module uses a fixed switching frequency during the entire motor drive process, the high-order harmonics will be concentrated in a fixed frequency range and have a large spectrum peak, resulting in high-frequency noise in a certain speed range of the motor. obvious

In addition, during the operation of the motor, the loss of the power device of the frequency converter is often extremely serious.

[0003] However, there is no effective inverter control method in the related art, which can reduce the loss of inverter power devices while effectively reducing noise.

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