A method and device for detecting the initial position of a motor rotor based on k-approximation optimal estimation

Abstract

The present invention provides a method and device for detecting the initial position of a motor rotor based on optimal K approximation estimation. The method includes the following steps: performing a calibration experiment on the motor to be tested to obtain an original calibration signal; injecting a set high-frequency signal into the stator of the main motor of the motor to be tested , to detect the current of the stator of the main exciter to obtain the test signal; calculate the clustering center of each original calibration signal to obtain the center calibration signal; calculate the Euclidean distance between the test signal and each center calibration signal, and select the Euclidean distance from the test signal For the nearest k center calibration signals, the calibration position with the largest number of calibration positions corresponding to the k center calibration signals is used as the position of the rotor of the main motor to be tested, and k is a positive integer. In the technical solution provided by the present invention, the current signal of the stator of the main exciter is directly used as a calibration signal and a test signal, without using a high-frequency filter for filtering, reducing the delay of signal acquisition, and improving the accuracy of the initial position detection of the motor rotor .

Description

technical field [0001] The invention belongs to the technical field of detecting the initial position of a motor rotor, and in particular relates to a method and a device for detecting the initial position of a motor rotor based on K proximity optimization estimation. Background technique [0002] The three-stage AC starting / generating system plays an important role in current aviation motors. The integrated starting / generating function of the system can reduce a set of starting devices, reduce the weight of the aircraft, and improve the operating stability of the system. With the gradual application of the three-stage AC starter / generator system in multi-electric aircraft, position sensorless rotor position estimation has become one of the hotspots in current aeromotor research. [0003] The development of all-electric aircraft has put forward higher requirements for the three-stage AC starting / generating system. The new three-stage synchronous motor system represented by t...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method and device for detecting the initial position of the motor rotor based on K-approximation optimization estimation, which is used to solve the problem of low accuracy of the detection results when the existing high-frequency signal injection method is used to detect the initial position of the main motor rotor

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