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A compressor permanent magnet synchronous motor control method, device and air conditioner

A technology of permanent magnet synchronous motor and control method, which is applied in the direction of motor control, motor generator control, AC motor control, etc., can solve the problems of compressor permanent magnet synchronous motor instability, hidden dangers of motor control, etc., and achieve saving adjustment time, The effect of maintaining stability and improving efficiency

Active Publication Date: 2022-02-22
NINGBO AUX ELECTRIC +1
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AI Technical Summary

Problems solved by technology

[0003] The control method of the inverter air conditioner determines the efficiency. In order to improve the cooling and heating capacity of the inverter air conditioner, the magnetic field weakening control method must be used to increase the operating frequency of the compressor. However, the magnetic field weakening control will cause the permanent magnet synchronous motor of the compressor to enter an unstable state. hidden dangers

Method used

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  • A compressor permanent magnet synchronous motor control method, device and air conditioner
  • A compressor permanent magnet synchronous motor control method, device and air conditioner
  • A compressor permanent magnet synchronous motor control method, device and air conditioner

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Embodiment Construction

[0050] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0051] Apparently, the illustrated embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0052] In order to facilitate understanding, in the present invention, it is necessary to elaborate on the technical problems therein.

[0053] Such as figure 1 As shown, it is a schematic diagram of a driving mode of a permanent magnet synchronous motor for an air conditioner compressor; Drive the permanent magnet synchronous motor of the compressor to run; wherein, the power supply is a two-phase AC power supply, the inverter circui...

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Abstract

The present invention provides a compressor permanent magnet synchronous motor control method, device and air conditioner. The method includes: acquiring the voltage vector of the compressor permanent magnet synchronous motor; when the voltage vector is greater than the third voltage threshold, Control the permanent magnet synchronous motor of the compressor to enter the field weakening mode; obtain the field weakening current according to the magnitude of the voltage vector and the third voltage threshold; control the permanent magnet synchronous motor of the compressor to obtain a current direction to increase the field weakening current. In this way, on the one hand, the stability of the motor operation can be maintained, the motor operation can be avoided from entering an unstable state, and the hidden dangers brought to the control of the compressor motor can be eliminated; The implementation steps of gradual recovery save adjustment time and improve control efficiency.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method and device for controlling a permanent magnet synchronous motor of a compressor, and an air conditioner. Background technique [0002] Inverter air conditioners have the advantages of energy saving and comfort, and their proportion is increasing year by year. In 2018, inverter air conditioners accounted for more than 70%. As consumers' requirements for air conditioner performance and comfort improve, the proportion of inverter air conditioners will further increase. National inverter air conditioners account for a higher proportion, and Japan is close to 100%. [0003] The control method of the inverter air conditioner determines the efficiency. In order to improve the cooling and heating capacity of the inverter air conditioner, the magnetic field weakening control method must be used to increase the operating frequency of the compressor. However, the magnetic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/22H02P25/024H02P27/08
CPCH02P21/05H02P21/0089H02P21/22H02P2207/05
Inventor 李发顺卓森庆陈红
Owner NINGBO AUX ELECTRIC
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