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Method and system for positioning initial position of rotor in permanent magnet synchronous motor

A permanent magnet synchronous motor, rotor initial position technology, applied in the control system, control generator, vector control system, etc., can solve the problems of positioning failure and motor failure to start successfully

Active Publication Date: 2018-07-06
GUANGDONG WELLING ELECTRIC MACHINE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a positioning method for the initial position of the rotor in a permanent magnet synchronous motor, aiming at solving the problem that the prior art adopts a one-time positioning method to locate the initial position of the rotor of the permanent magnet synchronous motor, which easily leads to positioning failure and Problems preventing the motor from starting successfully

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  • Method and system for positioning initial position of rotor in permanent magnet synchronous motor
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  • Method and system for positioning initial position of rotor in permanent magnet synchronous motor

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] In view of the problems existing in the initial position positioning of the rotor of the existing permanent magnet synchronous motor, the method for positioning the initial position of the rotor in the permanent magnet synchronous motor proposed by the present invention adopts at least two positioning methods to ensure successful positioning of the initial position of the rotor.

[0029] image 3 It shows the flow of the positioning method for the initial position of the rotor in the permanent magnet synchronous motor provided by the embodiment of the present invention, including the followi...

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Abstract

The invention belongs to the field of electromechanical control, and provides a positioning method for an initial position of a rotor in a permanent magnet synchronous motor and a system thereof. According to the positioning method and the system thereof, a manner with at least two times of positioning is adopted for ensuring successful positioning for the initial position of the rotor. Thus, on condition that an angle of a vector of the voltage applied to a stator and a vector of a rotor flux linkage is 180 DEG, subsequent positioning can perform a function of correcting positioning mistake at the first time, and finally the rotor of the motor is successively positioned to a known position, so that the motor can be successively started.

Description

technical field [0001] The invention belongs to the field of electromechanical control, in particular to a method and system for positioning the initial position of a rotor in a permanent magnet synchronous motor. Background technique [0002] At present, permanent magnet synchronous motors are gradually replacing asynchronous motors and are widely used in air-conditioning compressors. In order to improve the operating efficiency of the permanent magnet synchronous motor, a field oriented control (Field Oriented Control, FOC) control strategy is usually used in the motor control part. [0003] figure 1 The structural principle of the permanent magnet synchronous motor control system using this control strategy is shown. The permanent magnet synchronous motor control system includes a three-phase inverter for converting a DC input into a three-phase AC output, and a permanent magnet synchronous motor controller for outputting a PWM signal to drive the three-phase inverter t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14
Inventor 付彦超双波赵小安戈志强
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG