Electric motor controller resonance frequency detection...

Details Electric motor controller resonance frequency detection... Electric motor controller resonance frequency detection...

2005-06-07

2005-06-07

Duda, Rina (Department: 2837)

Electricity: motive power systems

Positional servo systems

With compensating features

C318S629000, C318S611000, C381S071100, C381S094100

Reexamination Certificate

active

06903530

ABSTRACT:
A resonance frequency detector for an electric motor controller in which a resonance frequency can be measured at high speed by a simple calculation and the resonance frequency can be detected by an inexpensive computer is provided. In an electric motor control system including an electric motor (3) for driving a machine, a detecting unit (5) for detecting an amount of operation of the machine (3) and a controller (2) for receiving a control command to drive the electric motor (3), a command generator (1) generates a sweep sine wave signal to input the signal to the electric motor control system, and the frequency information of the sweep sine wave signal outputted by the command generator (1) and the signal of the detecting unit (5) are inputted to output the frequency of the sweep sine wave signal when the absolute value of the signal of the detecting unit (5) becomes maximum as a resonance frequency.

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