Electricity: motive power systems – Limitation of motor load – current – torque or force
Reexamination Certificate
2007-08-21
2007-08-21
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Limitation of motor load, current, torque or force
C318S606000, C318S607000, C318S433000, C417S044110, C417S053000, C417S416000, C417S417000
Reexamination Certificate
active
11266353
ABSTRACT:
Disclosed is a method of controlling drive speed of a motor operating in overload conditions. The method includes the steps of: driving the motor at a predetermined reference speed; detecting phase voltage and phase current applied to the motor; determining whether or not the motor is operating in overload conditions based on the detected phase voltage and phase current; and controlling the motor according to whether or not the motor is operating in overload conditions. Accordingly, the present invention can prevent occurrence of over-current due to the instantaneous acceleration of the motor to a predetermined initial speed.
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Kim Tae-kyung
Kim Tae-won
Park Sung-min
Yang Soon-bae
Colon Santana Eduardo
Donovan Lincoln
Greenblum & Bernstein P.L.C.
LG Electronics Inc.
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