Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2008-05-06
2008-05-06
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S375000, C318S376000, C318S759000
Reexamination Certificate
active
07368889
ABSTRACT:
A motor control apparatus supplying AC power to a motor having a plurality of motor windings having an inverting part including a bridge circuit having a plurality of switching units, and supplying the AC power to the motor; brake relays short circuiting the motor windings by turning on when the motor brakes; brake resistors, respectively, connected to the motor windings and consuming an overcurrent generated from the motor when the brake relays short circuit the motor windings; and a switching controller turning on and turning off the switching units provided in one of opposite ends of the inverting part so that the overcurrent consumed by the brake resistors is changeable in proportion to a rotation speed of the motor, when the brake relays short circuit the motor windings to improve an effect of a dynamic braking operation and to prevent breakdown thereof.
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Notice of Official Action issued on Jan. 7, 2005 by the Korean Intellectual Property Office in the corresponding Korean Application No. 10-2003-0009430 (2 pages) (1 page English translation).
Park Jong-pill
Youm Jang-hyoun
Donovan Lincoln
McCloud Renata
Samsung Electronics Co,. Ltd.
Staas & Halsey , LLP
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