Demagnetization detection apparatus and detection method of permanent magnet synchronous linear motor

Abstract

The invention discloses a demagnetization detection apparatus and detection method of a permanent magnet synchronous linear motor. The demagnetization detection apparatus of a permanent magnet synchronous linear motor is characterized in that a linear motor with a demagnetization detection apparatus is used as a detection motor; the demagnetization detection apparatus takes an aluminium block as apedestal; a gaussmeter probe is fixedly arranged on the aluminium block by means of a clamp, so that the probe is arranged in the space air gap of the linear motor to be detected; adjusting bolts areused to adjust the positions of three detection points of the gaussmeter probe in space air gap of the linear motor to be detected; and the demagnetization detection apparatus is used for detecting distribution of air-gap flux density at the positions of the three detection points of the linear motor to be detected so as to realize demagnetization detection. The demagnetization detection apparatus and detection method of a permanent magnet synchronous linear motor can determine the difference distribution between the flux density to be detected and normal flux density distribution, and can extract the demagnetization fault characteristics. The demagnetization detection apparatus and detection method of a permanent magnet synchronous linear motor can realize accurate identification of thedemagnetization fault by means of a PNN classification algorithm.

Description

technical field [0001] The invention relates to the field of permanent magnet synchronous linear motors, in particular to a demagnetization detection device and a detection method for permanent magnet synchronous linear motors. Background technique [0002] Ironless permanent magnet synchronous linear motor (PMSLM) has the advantages of simple structure, zero cogging, low loss and high positioning accuracy, and is widely used in precision CNC machine tools with less cutting force. For permanent magnet motors, the structural characteristics of permanent magnets determine the stable, high-efficiency, and high-precision operation of the PMSLM system. However, linear motors are easily affected by factors such as complex operating conditions, temperature rise, aging and natural aging. Permanent magnets are prone to partial demagnetization. When the permanent magnets are in a demagnetized state, the magnetic flux density and magnetic field of the permanent magnets will weaken rapi...

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Problems solved by technology

[0004] In order to solve the problem of partial demagnetization of PMLSM in the prior art, the present invention provides a demagnetization detection device and detection method of a permanent magnet synchronous linear motor, in order to be able to locate the demagnetized permanent magnet, and take measures to compensate or eliminate the fault, so as to be able to Improve the positioning accuracy of permanent magnet synchronous linear motors, making permanent magnet synchronous linear motors more widely used in precision machining technology

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