Waveform remodeling active vibration reduction method and system for power electronic interface industrial frequency transformer

By establishing a vibration model of the power electronic interface power frequency transformer and injecting third and fifth harmonics to reshape the voltage waveform, and using particle swarm optimization algorithm to optimize the core vibration acceleration, the vibration and noise problem of the power electronic interface power frequency transformer was solved, achieving the effect of low vibration and stable operation.

CN121809296AActive Publication Date: 2026-04-07HUNAN UNIV
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Patent Information

Application Number
CN202610281591.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-10
Publication Date
2026-04-07
Estimated Expiration
2046-03-10

AI Technical Summary

Technical Problem

The vibration and noise generated by power frequency transformers with power electronic interfaces during operation have adverse effects on the environment and service life. Existing vibration reduction methods mainly focus on the design of the transformer body, which is difficult to effectively reduce its vibration acceleration.

Method used

By establishing a vibration model of the power frequency transformer with a power electronic interface, the inverter output voltage is decomposed using Fourier analysis, and the third and fifth harmonics are injected to reshape the voltage waveform. The effective values ​​and initial phases of the third and fifth harmonics are solved using the particle swarm optimization algorithm to optimize the core vibration acceleration. The goal is to minimize the vibration acceleration, and the total voltage distortion rate is controlled as a constraint.

Benefits of technology

This technology enables low-vibration and stable operation of power frequency transformers with power electronic interfaces, effectively reducing vibration acceleration and improving equipment safety and reliability.

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Abstract

The invention discloses an active vibration reduction method and system for waveform remodeling of a power electronic interface industrial frequency transformer, and the method comprises the steps: firstly analyzing the correlation between the output voltage of an inverter and the vibration of the power electronic interface industrial frequency transformer, and deducing the relation between the output voltage of the inverter and the vibration acceleration of the power electronic interface industrial frequency transformer; thirdly, injecting third and fifth harmonics into the output voltage of the inverter to remodel the waveform of the inverter, obtaining an effective value of the vibration acceleration of the power electronic interface industrial frequency transformer after waveform remodeling, and then calculating the vibration acceleration of the power electronic interface industrial frequency transformer by taking the minimum effective value of the vibration acceleration as a target and the total voltage distortion rate as a constraint condition. And solving effective values and initial phases of third and fifth harmonics by using a particle swarm optimization algorithm to realize active vibration reduction of the power electronic interface industrial frequency transformer. According to the waveform remodeling active vibration reduction method for the power electronic interface industrial frequency transformer, the vibration acceleration of the power electronic interface industrial frequency transformer is effectively reduced, and low-vibration and stable operation is achieved.
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