Direct-current motor and fault detection method and device for mechanical equipment driven by direct-current motor

Abstract

The invention provides a direct-current motor and a fault detection method and device for mechanical equipment driven by the direct-current motor. The method comprises the following steps: acquiring voltage values, current values and rotating speed signals of the direct-current motor at N moments; obtaining a power value of each moment according to the voltage value and the current value of each moment; according to the power value and the rotating speed signal at each moment, obtaining energy consumed by the direct-current motor when the direct-current motor rotates by a preset angle each time; determining a fault feature according to the energy consumed by the direct current motor when the direct current motor rotates by a preset angle; and obtaining fault detection results of the directcurrent motor and the mechanical equipment according to the fault characteristics. According to the method and device, the fault characteristics are accurately obtained, and then whether the direct current motor and the mechanical equipment have faults or not can be accurately detected, so that normal operation of the direct current motor and the mechanical equipment is guaranteed.

Description

technical field [0001] The embodiments of the present application relate to the field of mechanical fault diagnosis, and in particular to a fault detection method and device for a DC motor and mechanical equipment driven by it. Background technique [0002] At present, the feature extraction and diagnosis of mechanical equipment such as motor body, bearing and gearbox have become the key to the research of mechanical equipment. Fault diagnosis of mechanical equipment can prevent accidents and provide reference for the manufacture and maintenance of mechanical equipment. [0003] In order to accurately diagnose the failure of mechanical equipment, it is first necessary to obtain the failure characteristics of the mechanical equipment, and then compare the characteristics with the corresponding characteristics of the mechanical equipment in normal operation, so as to determine whether the mechanical equipment has a failure. Among them, the fault features of the mechanical equi...

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Problems solved by technology

[0004] The embodiment of the present application provides a fault detection method and device for a DC motor and its driven mechanical equipment, which is used to solve the problem that the existing fault feature extraction method for mechanical equipment is not applicable to the DC motor drive system

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