Starting control method and device for permanent magnet synchronous motor and permanent magnet synchronous motor

A technology for permanent magnet synchronous motors and motor rotors, applied in motor control, motor generator control, AC motor control, etc., can solve problems such as out-of-step, difficult compressor control, and difficult compressor start-up, so as to achieve quick start and avoid The effect of compressor out of step and rapid cooling/heating

CN113972868AActive Publication Date: 2022-01-25GREE ELECTRIC APPLIANCES INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-01-25

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Abstract

The invention relates to a starting control method for a permanent magnet synchronous motor. The method comprises the steps that: a motor rotor is pre-positioned within a first preset time period, and the rotor is pulled to a set position, and the initial position information of the rotor is obtained; after the rotor is successfully pre-positioned, the rotor is changed from a static state to a state of rotating at a first preset rotating speed; in a second time period, the rotor runs at the first preset rotating speed; in a third time period, the phase difference between the control angle and the actual angle of the motor rotor is adjusted by controlling the synthetic flux linkage speed of a stator so as to meet a preset condition; in a fourth time period, the rotating speed of the rotor is reduced when the preset condition is met in the previous step; and when it is detected that the position of the rotor reaches the preset position and the starting time of the motor reaches a preset dragging time, the motor is switched from open-loop control to closed-loop control. According to the starting control method provided by the technical schemes of the invention, a compressor can be prevented from being out of step, and rapid refrigerating and heating functions are achieved.
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Description

Technical field

[0001] The present invention relates to the field of intelligent control, and more particularly to a permanent magnet synchronous motor start control method, a device, and a permanent magnet synchronous motor. Background technique

[0002] The frequency conversion air conditioning has been more than ten years in my country. Consumers have more and more demand for air conditioning. This requires air conditioning to quickly start and raise the compressor to a relatively high frequency in a shorter time after receiving the turning command. This puts higher requirements for compressor starting reliability.

[0003] The permanent magnet synchronous motor (PMSM below) is widely used in the frequency conversion air conditioning due to the advantages of high power density and fast dynamic response. Due to cost and difficult to install position sensors inside the compressor, there is a control strategy for non-position sensors, where the vector control based on the stator ...

Examples

Embodiment Construction

[0043] As used herein, the word "first", "second", or the like can be used to describe the elements in the exemplary embodiments of the present invention. These words are only used to distinguish a component and another component, and the inherent characteristics or order of the corresponding elements is not limited by the word. All terms (including techniques or scientific terms) used herein have the same integrated integration of ordinary skill in the art of the present invention, unless otherwise defined. Those terms as defined in the Common Dictionary are explained in the same meaning as the context meaning in the art in the art, and is not interpreted as having an ideal or too formal meaning, unless it is clearly defined in the present invention meaning.

[0044]Those skilled in the art will appreciate that the apparatus and method described herein and the apparatus and methods of the invention are unlimited, and the scope of the invention is limited only by the claims. Featu...