Motor rotor initial position detection method and device based on K proximity optimization estimation

Abstract

The invention provides a motor rotor initial position detection method and device based on K proximity optimization estimation. The method comprises the following steps: carrying out the calibration experiment on a to-be-detected motor, and obtaining an original calibration signal; injecting a set high-frequency signal into a main motor stator of the to-be-tested motor, and detecting the current of a main exciter stator to obtain a test signal; calculating a clustering center of each original calibration signal to obtain a central calibration signal; and calculating the Euclidean distance between the test signal and each center calibration signal, selecting k center calibration signals closest to the Euclidean distance of the test signal, and using the calibration position with the largestnumber in the calibration positions corresponding to the k center calibration signals as the position where the to-be-tested main motor rotor is located, wherein k is a positive integer. According tothe technical scheme provided by the invention, the current signal of the main exciter stator is directly used as a calibration signal and a test signal, a high-frequency filter is not needed for filtering, the delay of signal acquisition is reduced, and the detection accuracy of the initial position of the motor rotor can be improved.

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 function of starting / generating 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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