Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2011-04-26
2011-04-26
Benson, Walter (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S432000, C318S727000, C318S767000, C318S798000
Reexamination Certificate
active
07932692
ABSTRACT:
In a system for controlling rotation of a rotor of a multiphase rotary electric machine in relation to a stator thereof, a superimposing unit superimposes a first frequency signal on the input signal to the multiphase rotary electric machine. The first frequency signal has a first phase and a first period, and the first period is different from a period of rotation of the rotor. An amplitude detector detects an amplitude of a second frequency signal. The second frequency signal is actually propagated in the multiphase rotary electric machine with a second phase based on the superimposed first frequency signal. A rotation angle determiner determines a rotation angle of the rotor so as to eliminate a difference between the detected amplitude of the second frequency signal and a predetermined target amplitude thereof.
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Benson Walter
Chan Kawing
Denso Corporation
Nixon & Vanderhye PC
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