Preheating system and method of permanent magnet synchronous motor, and compressor

A permanent magnet synchronous motor and preheating technology, which is applied in control systems, control generators, vector control systems, etc., can solve the problems of poor preheating reliability and low preheating efficiency of permanent magnet synchronous motors

Active Publication Date: 2017-08-08
GUANGDONG MEIZHI COMPRESSOR
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to provide a preheating system, method and compressor of a permanent magnet synchronous moto...

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  • Preheating system and method of permanent magnet synchronous motor, and compressor
  • Preheating system and method of permanent magnet synchronous motor, and compressor
  • Preheating system and method of permanent magnet synchronous motor, and compressor

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Embodiment Construction

[0033] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.

[0034] see figure 1 Shown is a schematic structural view of a preheating system of a permanent magnet synchronous motor according to an embodiment of the present invention, as figure 1As shown, the preheating system 10 includes a DC power supply 101 for power supply, a space vector pulse width controller 102 (also can be referred to as SVPWM, Space Vector Pulse Width Modulation) and an inverter 103, the space vector pulse width The controller 102 can output pulse width modulation signals to control the inverter 103; The magnetic synchronous motor 20 is preheated; more specifical...

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Abstract

Embodiments of the invention provide a preheating system and method of a permanent magnet synchronous motor, and a compressor, and belong to the preheating field of the permanent magnet motor. The permanent magnet synchronous motor comprises a permanent magnet and a winding coil; the preheating system of the permanent magnet synchronous motor comprises a direct current power supply, an inverter and a space vector pulse width modulation controller, wherein the direct current power supply is used for supplying power for the preheating system of the permanent magnet synchronous motor; the inverter is connected to the winding coil; the input end of the space vector pulse width modulation controller is connected to the direct current power supply, and the output end of the space vector pulse width modulation controller is connected to the inverter and used for outputting a pulse width modulation signal to the inverter, wherein the inverter is used for outputting a high-frequency three-phase alternating current voltage to the winding coil based on the pulse width modulation signal so as to preheat the winding coil and the permanent magnet under the effect of the high-frequency three-phase alternating current voltage. Therefore, in the preheating process, copper loss as well as rich and substantial stray loss are generated, so that the motor can be preheated uniformly, efficiently and rapidly.

Description

technical field [0001] The invention relates to the field of preheating of permanent magnet motors, in particular to a preheating system, method and compressor of permanent magnet synchronous motors. Background technique [0002] At present, the motors of some air-conditioning cooling fans and compressors are permanent magnet synchronous motors without position sensors. Low temperature freezing state and changes in winding parameters. And because the rotor position of the synchronous motor is unknown before starting, it is necessary to estimate the rotor position according to its winding parameters. If the winding parameters change and the rotor position is uncertain, if the motor is started forcibly after starting up, the rotor position will not be detected easily. , resulting in failure to start, or even damage to the motor. [0003] In the prior art, there are generally two solutions for the preheating of the permanent magnet synchronous motor. The first solution is: ti...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/22
CPCH02P21/0003
Inventor 郑绪成宋万杰任新杰
Owner GUANGDONG MEIZHI COMPRESSOR
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