Method of control of magnetic sound of alternating current...

Details Method of control of magnetic sound of alternating current... Method of control of magnetic sound of alternating current...

2006-05-23

2006-05-23

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Positional servo systems

Unwanted harmonic or voltage component elimination...

C318S448000

Reexamination Certificate

active

07049783

ABSTRACT:
A method for greatly reducing magnetic sound of an alternating current rotating machine compared with the past comprising superimposing an n−1-th order frequency in inverse turn and an m+1-th order magnetic sound reduction use harmonic current in the same turn on a multi-phase alternating current with reference to a basic frequency component of the multi-phase alternating current supplied to an armature of the alternating current rotating machine of multiple phases so as to reduce the n-th order, m-th order, and n+m-th order harmonic components of the basic frequency component among radial direction magnetic vibrating forces generated in the radial direction in a core of the alternating current rotating machine.

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