Compressor, control method of compressor, torque compensation method and device and storage medium
A technology for torque compensation and compressors, applied in the fields of compressors and their control methods, devices, storage media, and torque compensation methods, can solve problems such as large vibration and unstable motor speed, and reduce vibration and ensure stability. Run and realize the effect of real-time online adjustment
Active Publication Date: 2021-06-18
GUANGDONG MEIZHI COMPRESSOR
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Problems solved by technology
Different from dual-rotor and scroll compressors, which have stable load fluctuations and small fluctuations in load torque, when single-rotor compressors operate at low frequencies, due to gas compression, the load torque changes continuously, resulting in torque ripples, which eventually lead to motor speed Unstable and large vibration, therefore, special torque compensation control method is required to make the single rotor compressor run smoothly at low speed
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[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0033] In an embodiment of the present invention, the compressor is a multi-pole permanent magnet synchronous motor, such as a single-rotor permanent magnet synchronous motor with 8 or more poles, which has the advantages of low cost, small torque fluctuation, and low vibration and noise. When the multi-pole single-rotor piston compressor operates at low frequency, due to the continuous change of the load torque when the gas is compressed, the motor speed will eventually be unstable. By applying current compensation on a reasonab...
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The invention discloses a compressor, a control method of the compressor, a torque compensation method and a device and a storage medium, the compressor is a multi-pole permanent magnet synchronous motor, and the torque compensation method comprises the following steps that obtaining the target speed and the feedback speed of the compressor ; generating a fluctuation speed according to the target speed and the feedback speed; generating an electrical angle pulse signal having the same electrical angle frequency as the compressor; obtaining a mechanical angle according to the electrical angle pulse signal and the fluctuation speed; generating a torque compensation amplitude according to the fluctuation speed; and calculating a torque compensation instantaneous value according to the mechanical angle and the torque compensation amplitude, and taking the torque compensation instantaneous value as a feedforward torque compensation value. According to the torque compensation method, the load torque angle and the load torque amplitude can be tracked in real time, then vibration of the compressor during low-frequency operation can be reduced, and stable operation of the compressor is guaranteed.
Description
technical field [0001] The invention relates to the technical field of motors, in particular to a compressor and its control method, torque compensation method, device and storage medium. Background technique [0002] In recent years, with the development of power electronic control technology and the upcoming implementation of stricter new energy efficiency standards for air conditioners, higher energy efficiency requirements have been put forward for air conditioner design, and at the same time, air conditioner products have been guided to develop in the direction of frequency conversion control. [0003] At present, most inverter air conditioners below 2HP on the market use DC inverter single-rotor compressors. Different from dual-rotor and scroll compressors, which have stable load fluctuations and small fluctuations in load torque, when single-rotor compressors operate at low frequencies, due to gas compression, the load torque changes continuously, resulting in torque ...
Claims
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IPC IPC(8): H02P23/14H02P23/04H02P25/022F04B49/06F04B35/04
CPCH02P23/14H02P23/04H02P25/022F04B49/065F04B35/04Y02B30/70
Inventor 武文斌王世超张副强任新杰
Owner GUANGDONG MEIZHI COMPRESSOR