Patent ID: 7075263
Filing Date: 2006-07-11
Classification: H02P

Abstract:
1. A resonance frequency detecting device of a multi-shaft electric motor control apparatus comprising an electric motor control system provided with each of a plurality of shaft of a machine, the electric motor control system having: an electric motor for driving one of the plurality of shafts of a machine; a controller for driving the electric motor upon receipt of a control command for each of the shafts, a detector for detecting an operating amount of the machine; a signal processor for analyzing a frequency of a signal of the detector and outputting the frequency as a resonance frequency; and an output device for changing a signal of the signal processor into a graph or a numeric value to be output, wherein at least one command generator for giving the control command for transmitting a vibration to the machine to at least one of the electric motor control systems is provided to input signals of the detectors to the signal processors and to output them as resonance frequencies.