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Method and system for controlling alternating-current permanent-magnet synchronous motor

A technology of permanent magnet synchronous and control method, applied in the direction of speed/torque control of a single motor, can solve the problem of variable frequency starting permanent magnet synchronous motor not saving energy, and achieve the effect of ingenious design, solving energy saving and reducing power-on time

Inactive Publication Date: 2014-03-12
岳群生
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a control method and system for an AC permanent magnet synchronous motor in order to solve the problem that the variable frequency starting permanent magnet synchronous motor does not save energy during speed regulation operation and constant speed operation

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  • Method and system for controlling alternating-current permanent-magnet synchronous motor

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Embodiment Construction

[0013] A control method for an AC permanent magnet synchronous motor, the method is realized by the following steps:

[0014] 1) The AC permanent magnet synchronous motor is powered by a frequency converter power supply, so that it can be started by frequency conversion;

[0015] 2) If the AC permanent magnet synchronous motor needs speed regulation, the AC permanent magnet synchronous motor still uses the inverter power supply for power supply, so as to perform speed regulation operation; if the AC permanent magnet synchronous motor needs constant speed, and the output frequency of the inverter power supply is the same as When the frequency of the grid power supply is consistent, the AC permanent magnet synchronous motor is continuously switched from the power supply of the frequency converter to the grid power supply, thereby running at a constant speed;

[0016] 3) When the AC permanent magnet synchronous motor needs constant speed during speed regulation operation, and the...

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Abstract

The invention relates to technologies for controlling alternating-current permanent-magnet synchronous motors, in particular to a method and a system for controlling an alternating-current permanent-magnet synchronous motor. The method for controlling the alternating-current permanent-magnet synchronous motor includes steps of 1), powering the alternating-current permanent-magnet synchronous motor by a power source of a frequency converter, and starting the alternating-current permanent-magnet synchronous motor in a variable-frequency manner; 2), powering the alternating-current permanent-magnet synchronous motor by the power source of the frequency converter if the speed of the alternating-current permanent-magnet synchronous motor needs to be regulated, and enabling the alternating-current permanent-magnet synchronous motor to run in a speed regulated manner; 3), powering the alternating-current permanent-magnet synchronous motor by a power source of a power grid in an uninterrupted switching manner when the constant speed of the alternating-current permanent-magnet synchronous motor running in the speed regulated manner is required; 4), powering the alternating-current permanent-magnet synchronous motor by the power source of the frequency converter in an uninterrupted switching manner when the speed of the alternating-current permanent-magnet synchronous motor running in a constant-speed manner needs to be regulated. The method and the system have the advantages that the problem of energy wastage when a variable-frequency starting permanent-magnet synchronous motor runs in a speed regulated manner and a constant-speed manner can be solved, and the method and the system are applicable to alternating-current permanent-magnet synchronous motors.

Description

technical field [0001] The invention relates to the control technology of an AC permanent magnet synchronous motor, in particular to a control method and system for an AC permanent magnet synchronous motor. Background technique [0002] AC permanent magnet synchronous motors can be divided into two types: variable frequency starting permanent magnet synchronous motors and asynchronous starting permanent magnet synchronous motors. Among them, the variable frequency starting permanent magnet synchronous motor is powered by a frequency converter power supply, which is mostly used in speed regulation occasions. The asynchronous start permanent magnet synchronous motor is powered by grid power supply, which is mostly used in constant speed occasions (because the quality of the inverter power supply electrical parameters is lower than that of the grid power supply, under the condition of grid frequency constant speed operation, the frequency conversion The efficiency of starting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08
Inventor 岳群生
Owner 岳群生
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