Fault detection device and method of asynchronous motor

A fault detection and motor technology, applied in the direction of motor generator testing, etc., can solve the problems of high cost of vibration sensors, unfavorable fault detection and maintenance of asynchronous motors, and inability to accurately and reliably distinguish fault types.

Inactive Publication Date: 2011-07-27
THE PLA NAVY SUBMARINE INST
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Problems solved by technology

However, this method needs to install a vibration sensor, and the vibration sensor is expensive and easy to damage, which limits the further application of this method.
[0007] Due to the limitations of the existing detection technologies for stator winding turn-to-turn short

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  • Fault detection device and method of asynchronous motor
  • Fault detection device and method of asynchronous motor
  • Fault detection device and method of asynchronous motor

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Embodiment Construction

[0031] For the convenience of description, the present invention will be further explained in conjunction with the drawings and specific embodiments.

[0032] The fault detection device of the asynchronous motor of the present invention comprises: 3 voltage acquisition instruments for voltage signal acquisition, preferably adopt voltage converter; For the current acquisition instrument of current acquisition, preferably adopt clamp ammeter; The instrument is connected with the signal acquisition system. The signal acquisition system preferably adopts signal acquisition and analog-to-digital conversion card. The motor operation parameter signal obtained from the signal acquisition system is transmitted to the fault analysis and processing system. The single-chip microcomputer of fault detection software or the core circuit board that is configured with ARM processor, and this core circuit board is preferably such as figure 1 The shown embedded hardware platform based on ARM mic...

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Abstract

The invention relates to a fault detection device and method for detecting an initial fault of a motor. The fault detection device comprises a voltage collection apparatus, a current collection apparatus, a signal collection system and a fault analyzing and processing system, wherein the voltage collection apparatus is used for collecting voltage signals of the motor; and the current collection apparatus is used for collecting current signals of the motor. The fault detection device is characterized in that the voltage collection apparatus and the current collection apparatus are connected with the signal collection system; the signal collection system processes collected voltage signals and current signals and then transmits to the fault analyzing and processing system; and the fault analyzing and processing system calculates, analyzes and processes data transmitted by the signal collection system so as to obtain the state information of the asynchronous motor. The fault detection method is used for measuring the voltage and the current of the motor and obtaining the fault indexes of turn-to-turn short-circuit faults, rotor broken faults and bearing faults according to a measuring result. The invention provides a foundation for analyzing the initial fault of the asynchronous motor and offers a proposal for the maintenance of the motor.

Description

technical field [0001] The invention relates to a fault detection device, in particular to a fault detection device and a detection method for a three-phase asynchronous motor. Background technique [0002] As a transmission machine, asynchronous motors are widely used in various types, and their safe operation is very important. It is of great significance to realize the reliable detection of initial faults of asynchronous motors, which is helpful to rationally arrange, organize active maintenance, predict maintenance, and avoid accidental shutdown. [0003] Faults of asynchronous motors mainly include inter-turn short circuit of stator winding, broken rotor bars and bearing faults, the occurrence probability of which is about 15%, 10%, and 40%, respectively. [0004] For the stator winding inter-turn short-circuit fault detection technology, there are currently three detection schemes; (1) detect the inter-turn short-circuit fault by detecting the axial leakage flux of th...

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Application Information

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IPC IPC(8): G01R31/34
Inventor 孙俊忠刘金辉张海鹏刘爱华姜海龙周智勇鄢英李嘉顾明涛许伯强吴重祥
Owner THE PLA NAVY SUBMARINE INST
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