Rotor flux on-line identification method and system for permanent magnet synchronous motor

A permanent magnet synchronous motor and rotor flux linkage technology, applied in the field of rotor flux linkage online identification, can solve the problems of air conditioner overcurrent and failure to start.

Active Publication Date: 2016-01-06
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

If the original parameters are still used for setting in the case of demagnetization, then the air conditioner will have problems such as overcurrent or failure to start.

Method used

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  • Rotor flux on-line identification method and system for permanent magnet synchronous motor
  • Rotor flux on-line identification method and system for permanent magnet synchronous motor
  • Rotor flux on-line identification method and system for permanent magnet synchronous motor

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Embodiment Construction

[0035] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0036] figure 1 It is a flow chart of the online identification method of the rotor flux linkage of the permanent magnet synchronous motor according to the first embodiment of the present invention.

[0037] Such as figure 1 As shown, an online identification method of rotor flux linkage of a permanent magnet synchronous motor includes the following steps:

[0038] S1, obtain the previous rotor flux value and intermediate variable value respectively.

[0039] S2. Substituting the previous rotor flux linkage value and the intermediate variable value obtained in S1 into the rotor flux linkage calculation formula to calculate the current rotor flux linkage value.

[0040] The rotor flux calculation formula of the pr...

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Abstract

The invention relates to a rotor flux on-line identification method and a system for a permanent magnet synchronous motor. The method includes: S1, respectively obtaining a previous rotor flux value and an intermediate variable value; and S2, putting the obtained previous rotor flux value and the intermediate variable value into a rotor flux calculating formula, and calculating the current rotor flux value. According to the method and the system, a classic dq-axis mathematical model is employed, a recurrence least square method is employed, the state of the rotor permanent magnet can be effectively obtained via the estimation of the rotor flux, the phenomenon of demagnetization due to over-high current is effectively prevented, the problem of frequency shutdown is prevented, and the related complaint problem of consumers is solved; the realization is simple, the calculation amount is small, any hardware cost is not needed, large-area engineering practice and promotion can be realized, and the method and the system are applicable to the permanent magnet synchronous motors of different kinds.

Description

technical field [0001] The invention relates to the field of motor drive control, in particular to a method and system for online identification of rotor flux linkage of a permanent magnet synchronous motor. Background technique [0002] For motors, convex permanent magnet synchronous motors are generally used. The rotor flux linkage is a key parameter that reflects the performance of the motor. In air conditioning applications, the permanent magnet synchronous motor is the main component of the compressor. If the compressor has too much current and the motor demagnetizes, it will have a great impact on the performance of the air conditioner. Impact. If the original parameters are still used to set in the case of demagnetization, then the air conditioner will have problems such as overcurrent or failure to start. [0003] At the same time, the rotor flux parameters of the motor also play a very important role in vector control. For example: position estimation, MTPA (maxi...

Claims

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Application Information

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IPC IPC(8): H02P21/14
Inventor 陈毅东
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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