Start control method and device of permanent magnet synchronous motor

A permanent magnet synchronous motor and controller technology, which is applied in the direction of motor control, motor generator control, and electromechanical transmission control, and can solve the problems of unreliable starting of permanent magnet synchronous motors

Inactive Publication Date: 2017-02-01
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a permanent magnet synchronous motor starting control method and device, which solves the technical problem of unreliable starting of the permanent magnet synchronous motor in the prior art

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  • Start control method and device of permanent magnet synchronous motor
  • Start control method and device of permanent magnet synchronous motor
  • Start control method and device of permanent magnet synchronous motor

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Embodiment Construction

[0030] 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.

[0031] figure 1 It is a schematic flowchart of a permanent magnet synchronous motor starting control method provided by an embodiment of the present invention. Such as figure 1 As shown, the starting control method of the permanent magnet synchronous motor includes:

[0032] Step 0100, determine the initial position of the rotor of the permanent magnet synchronous motor;

[0033] Permanent magnet synchronous motors can be surface-mounted permanent magnet synchronous motors, embedded permanent magnet synchronous motors and embedded permanent magnet synchronous motors. Figure 1a is the coordinat...

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Abstract

The invention relates to the technical field of motors, in particular to a start control method and device of a permanent magnet synchronous motor. The method comprises the following steps: determining the initial position of a rotor of the permanent magnet synchronous motor; injecting high-frequency voltage component into the permanent magnet synchronous motor; extracting high-frequency response current from current output by the permanent magnet synchronous motor; extracting high-frequency current negative sequence component from the high-frequency response current; according to a heterodyne method, getting a rotor position error value from the high-frequency current negative sequence component; and according to the rotor position error value, controlling the rotating speed of the permanent magnet synchronous motor in a closed-loop manner to be adjusted to a target rotating speed. When the permanent magnet synchronous motor is started, the rotating speed of the permanent magnet synchronous motor in the closed-loop manner to be adjusted to the target rotating speed according to the rotor position error value, so that the permanent magnet synchronous motor can be controlled to gradually accelerate synchronous rotation according to feedback rotor position information, and the problem of start failure caused by the fact that the target rotating speed is applied to the permanent magnet synchronous motor directly is avoided from occurring.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a starting control method and device for a permanent magnet synchronous motor. Background technique [0002] After the permanent magnet synchronous motor (Permanent magnetic synchronous machine, PMSM) adopts sensorless control, coupled with the application of frequency conversion technology, it has excellent performance and has good application prospects in many fields. It is widely used in electric vehicles, industrial sewing machines, air conditioners, Applications such as elevators and higher precision CNC machine tools and robots. [0003] In the process of realizing the present invention, the inventor found the following problem in the related technology: the existing permanent magnet synchronous motor has a starting problem. Since the observer itself has not started to work when the permanent magnet synchronous motor is started, or the calculation results of the observer ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/34
CPCH02P2207/05
Inventor 刘涛杨湘木戴安康
Owner GREE ELECTRIC APPLIANCES INC
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