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Online rotor resistance identification method of asynchronous motor

A rotor resistance, asynchronous motor technology, applied in the control of generators, motor generator control, electronic commutation motor control, etc. Torque pulsation, providing stability, and the effect of good performance

Active Publication Date: 2012-07-25
CHANGZHOU LIANLI AUTOMATION TECH +1
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AI Technical Summary

Problems solved by technology

[0006] In view of the above technical problems, the present invention provides an online motor rotor resistance identification method for a speed sensorless vector control system, which overcomes the difficulty of installing a speed sensor on the motor and the defects that the speed sensor cannot adapt to various use environments, and at the same time realizes the online identification of the rotor resistance. Identification, can accurately measure and calculate the change of motor parameters, and adjust the motor controller to improve the performance of the motor controller, so that the motor has better robustness

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  • Online rotor resistance identification method of asynchronous motor
  • Online rotor resistance identification method of asynchronous motor
  • Online rotor resistance identification method of asynchronous motor

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Refer below image 3 A brief description of the speed sensorless vector control system: a speed sensorless vector control system based on a full-order state observer, including a flux link PI control module 17, a speed loop PI control module 16, and a first current loop PI control module 18 , second current loop PI control module 19, rotation / stationary coordinate transformation module 8, space vector pulse width modulation module 14, phase voltage reconstruction module 15, rotor resistance online identification module 2, full-order state observer module 5, static / Stationary coordinate transformation module 12, stationary / rotating coordinate transformation module 13 and flux linkage given module 6, when the motor starts, given the rotor speed and the flux linkage of the rotor, the rotor resistance value in the full-order state observer ...

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Abstract

The invention relates to an online motor parameter identification method, in particular to an online rotor resistance identification method of a non-speed sensor vector control system. The method is characterized in that, during dynamic adjustment of a system, the online rotor resistance identification can be realized by using transient flux change process and by adopting an adaptive forgetting factor recursive least square algorithm in combination with an integral-improved voltage model flux observer independent from a full-order adaptive state observer; during stable operation of the system, the rotor flux is subjected to a specific harmonic transiently at a certain time interval to generate dynamic flux change, and the rotor resistance can be identified by adopting the adaptive forgetting factor recursive least square algorithm in combination with the integral-improved voltage model flux observer so as to online refresh the rotor resistance in the full-order adaptive state observer. The online motor rotor resistance identification method provided by the invention can calculate the motor parameter change so as to regulate a motor controller, thereby improving the performance of the motor controller.

Description

technical field [0001] The invention relates to an identification method of motor parameters, in particular to an online identification method of rotor resistance in a speed sensorless vector control system. Background technique [0002] In the three-phase asynchronous motor (hereinafter referred to as "motor" or "motor") speed control system, the speed is a very important control quantity, so the speed must be closed-loop controlled. Due to the difficulty in installing the speed sensor, increasing the cable and cost in the speed control system, and being difficult to use in harsh environments, the speed sensorless motor drive has developed significantly in the past two decades. Among them are the open-loop speed estimation based on the mathematical model of the motor, the adaptive speed estimation based on PI, and the adaptive speed estimation based on model reference (including based on rotor flux linkage, based on back EMF, based on reactive power and other model referenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
Inventor 何礼高蔡准杜恩利李旭徐兵兵徐华胡磊高菊玲
Owner CHANGZHOU LIANLI AUTOMATION TECH
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