Reliable and smooth sensorless permanent magnet synchronous motor starting method

A technology of permanent magnet synchronization and starting method, which is applied in the direction of motor generator control, electronic commutation motor control, control generator, etc., which can solve the problems of large current pulsation, weaken current pulsation, and improve starting reliability and smoothness , Avoid the effect of motor overcurrent problem

Pending Publication Date: 2020-10-16
青岛斑科变频技术有限公司
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  • Abstract
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Problems solved by technology

[0005] The invention proposes a reliable and smooth permanent magnet synchronous motor starting method based on a position sensor,

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  • Reliable and smooth sensorless permanent magnet synchronous motor starting method
  • Reliable and smooth sensorless permanent magnet synchronous motor starting method
  • Reliable and smooth sensorless permanent magnet synchronous motor starting method

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Embodiment Construction

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. For The descriptions of these embodiments are used to help the understanding of the present invention, but are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0034] Among them, in the description of the embodiments of this application, unless otherwise specified, " / " means or means, for example, A / B can mean A or B; "and / or" in this article is only a description of associated objects The association relationship of indicates that there may be three kinds ...

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Abstract

The invention relates to the technical field of permanent magnet synchronous motor control, and discloses a reliable and smooth sensorless permanent magnet synchronous motor starting method. The method comprises the following steps: in a pre-positioning stage, controlling the angular velocity of a stator current vector to be unchanged, and increasing the amplitude to a set amplitude by a first setfunction, and then controlling the amplitude of the stator current vector to be unchanged and the instruction position angle to be increased by a second set function until the stator current vector is synchronous with the rotor position; in an I/F acceleration stage, enabling the stator current vector and the rotor flux linkage position to keep synchronous following through the torque-self-balancing characteristic until the lowest rotating speed of speed closed-loop operation is reached; in a closed-loop cut-in stage, keeping the rotating speed of the motor at the lowest rotating speed of speed closed-loop operation, gradually reducing the amplitude of the stator current vector, and when the included angle theta L is gradually attenuated to be less than the threshold theta LLmt, switchingthe closed-loop operation mode. The motor current is controllable before and after the system is started, the current pulsation is small when the system is switched into a closed loop, and the starting reliability and smoothness are improved.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motor control, in particular to a reliable and smooth starting method for a permanent magnet synchronous motor based on a position sensor. Background technique [0002] The permanent magnet synchronous motor (PMSM) has the characteristics of high power density, high efficiency, simple structure, and low noise. With the development of motor control theory and the popularization of digital microprocessors, high-performance permanent magnet synchronous motor drive systems have also been obtained. Wide range of applications. In the field of white goods, air-conditioning compressors are increasingly driven by permanent magnet synchronous motors. At present, the PMSM drive system applied to air-conditioning compressors and fans mainly uses vector control technology, and vector control needs to obtain real-time position and speed information of the rotor. Position sensors such as e...

Claims

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Application Information

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IPC IPC(8): H02P21/34H02P6/20
CPCH02P6/20H02P21/34
Inventor 李光明李胜关彦彬向柏澄
Owner 青岛斑科变频技术有限公司
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