Fault detection and positioning method for rotary rectifier of aeronautical brushless electric excitation synchronous motor

A technology of rotating rectifiers and synchronous motors, which is applied in the direction of motor generator testing, instruments, and measuring electricity. It can solve the problems of insufficient reflection speed, large number of data samples, and processing speed to be improved, and achieve the effect of fault diagnosis and positioning.

Active Publication Date: 2018-03-23
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of method first uses the signal to reflect the fault of the rotating rectifier indirectly, and the reflection speed is not fast enough. Second, because the data processing uses FFT, the processing speed needs to be improved. At the same time, the artificial intelligence algorithm requires a large number of data samples

Method used

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  • Fault detection and positioning method for rotary rectifier of aeronautical brushless electric excitation synchronous motor
  • Fault detection and positioning method for rotary rectifier of aeronautical brushless electric excitation synchronous motor
  • Fault detection and positioning method for rotary rectifier of aeronautical brushless electric excitation synchronous motor

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Embodiment Construction

[0033] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0034] (1) For aviation brushless electric excitation synchronous motors (see figure 1 ), using Simulink offline simulation to obtain the stator side voltage and current of the main exciter under various states of the rotating rectifier (a diode D1-D6 is faulty and normal respectively), and estimate the rotor current of the main exciter through the stator flux linkage, and estimate the formula (1 )as follows;

[0035]

[0036] In the formula:

[0037]

[0038] Among them: u eαs , u eβs is the exciter stator voltage; i eαs i eβs is the exciter stator current; R es , L es is the stator resistance and inductance of the exciter; M esr is the stator-rotor mutual inductance; θ er is the rotor position; i ear i ebr i ecr is the exciter rotor current;

[0039] (2) Perform FFT analysis on the estimated rotor current to obtain the waveform amplitude of 1...

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Abstract

The invention relates to a fault detection and positioning method for a rotary rectifier of an aeronautical brushless electric excitation synchronous motor. Through Euler distance and the proximity principle, a condition that whether a fault occurs and a type of the fault are judged, then an upper arm fault or a lower arm fault is judged through a sum of a maximum value and a minimum value of fault phase current in one cycle, and the fault diagnosis and positioning can be realized. The method has the advantages that (1) whether the rotary rectifier is failed can be accurately determined, and (2) a diode with an open circuit can be accurately positioned.

Description

technical field [0001] The invention belongs to the field of fault detection of a brushless electric excitation synchronous motor, and relates to a fault detection and positioning method for a rotary rectifier of an aviation brushless electric excitation synchronous motor. Background technique [0002] In the aviation brushless electric excitation synchronous motor, the rotating rectifier is a very important structural unit. The failure of its diode will cause the excitation current to drop sharply, the torque ripple will increase, the motor's load capacity will decrease, and the system will crash in severe cases. ,can not work. Therefore, it is necessary to detect and locate the fault of the rotating rectifier before and after the system is started, so as to reduce the workload of manual detection. Rotary rectifier faults can be divided into two types: short circuit and short circuit. Since the current flowing through the diode will increase sharply in the case of a short...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34G01R31/02
Inventor 魏志煌刘卫国张赞焦宁飞孟涛
Owner NORTHWESTERN POLYTECHNICAL UNIV
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