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

A technology of initial position detection and motor rotor, which is applied in the direction of controlling electromechanical transmission devices, electronic commutators, and control generators, etc., can solve the problems of low accuracy of detection results, and achieve low accuracy, accurate initial position, The effect of reducing the delay

Inactive Publication Date: 2021-06-01
XUCHANG UNIV
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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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  • A method and device for detecting the initial position of a motor rotor based on k-approximation optimal estimation
  • A method and device for detecting the initial position of a motor rotor based on k-approximation optimal estimation
  • A method and device for detecting the initial position of a motor rotor based on k-approximation optimal estimation

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[0034] Method example:

[0035] This embodiment provides a method for detecting the initial position of the rotor of a motor based on K-proximity optimization estimation, which is used to detect the initial position of the rotor of a three-stage synchronous motor, and solves the inconsistencies in the detection results of the initial position of the rotor of a three-stage synchronous motor in the prior art. exact question.

[0036] The method for detecting the initial position of the motor rotor provided by this embodiment is close to the optimal estimation of K, and the three-stage synchronous motor system used for detection is as follows: figure 1 As shown, including the main generator, main exciter and auxiliary exciter, the detection process is as follows figure 2 As shown, the steps are as follows:

[0037] Step 1: Test and calibrate the synchronous motor.

[0038] In this embodiment, the method for testing and calibrating the synchronous motor is as follows:

[0039...

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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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/18H02P21/18H02P21/32
CPCH02P6/183H02P2203/03H02P2203/11H02P21/18H02P21/32
Inventor 栗伟周张赞马军磊李瑞华吕存杰吴鑫鑫田尚永
Owner XUCHANG UNIV
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