Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2006-04-18
2006-04-18
Martin, David (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S132000, C318S254100, C318S434000, C318S700000, C318S800000, C318S801000, C318S803000, C318S806000
Reexamination Certificate
active
07030589
ABSTRACT:
An AC motor control apparatus that is applicable to commonly used PM motors and capable of detecting the magnetic pole position with simple algorithm. The AC motor control apparatus comprises an inverter for applying arbitrary AC power to an AC motor and a controller for sending a control signal to the inverter. The controller comprises a ripple current generator for supplying a ripple current to the AC motor and a magnetic pole position estimator. The magnetic pole position estimator observes at least two current values of the ripple current for both positive and negative sides of the ripple current to estimate the magnetic pole position of the AC motor.
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Endo Tsunehiro
Iwaji Yoshitaka
Kaneko Daigo
Okubo Tomofumi
Sakamoto Kiyoshi
Antonelli, Terry Stout and Kraus, LLP.
Hitachi Industrial Equipment Systems Co. Ltd.
Martin David
Smith Tyrone
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