Compressor, control method and device of compressor, storage medium and controller

By adjusting the d-axis and q-axis voltages according to the overmodulation region in a multi-pole, low-layer compressor motor, and prioritizing sufficient d-axis voltage, the shutdown problem caused by insufficient field weakening is solved, thereby improving the compressor's speed-up capability and stability.

CN122292968APending Publication Date: 2026-06-26GUANGDONG MEIZHI COMPRESSOR
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Patent Information

Application Number
CN202411931204.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Multi-pole, low-layer compressor motors shut down at high frequencies due to insufficient field weakening. Existing technologies suffer from insufficient d-axis voltage and excessive q-axis voltage, which limit the compressor's speed-up capability.

Method used

By acquiring the bus voltage and reference vector voltage of the compressor within a preset frequency range, the overmodulation region is determined, and the d-axis voltage and q-axis voltage are adjusted according to the overmodulation region and its corresponding processing coefficient. Priority is given to ensuring sufficient d-axis voltage and reducing q-axis voltage to maximize field weakening.

Benefits of technology

It improves the compressor's speed-up capability, prevents shutdowns due to insufficient weak magnetism during high-frequency operation, and ensures stable compressor operation.

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Abstract

The invention discloses a compressor and a control method and device thereof, a storage medium and a controller, and the method comprises the steps: obtaining a bus voltage and a reference vector voltage under the condition that the compressor operates at a frequency within a preset frequency range; determining a first coefficient according to the bus voltage and the reference vector voltage; and determining an overmodulation area where the compressor is located according to the first coefficient, and adjusting the d-axis voltage and the q-axis voltage of the compressor according to the overmodulation area where the compressor is located and the corresponding overmodulation processing coefficient. Therefore, according to the method, different overmodulation processing coefficients are adopted to adjust the d-axis voltage and the q-axis voltage of the compressor according to the overmodulation area where the compressor is located, so that it is preferentially guaranteed that the d-axis voltage is sufficient, the q-axis voltage is reduced, flux weakening is maximized, and the speed increasing capacity of the compressor is improved; and the situation that the compressor is shut down due to insufficient weak magnetism during high-frequency operation of the compressor is prevented.
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