Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Reexamination Certificate
2003-09-24
2008-03-11
Donovan, Lincoln (Department: 2837)
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
C417S212000, C318S459000, C318S119000
Reexamination Certificate
active
07341432
ABSTRACT:
An apparatus and a method for controlling operation of a reciprocating compressor is capable of reducing a stroke estimation error by eliminating an error that occurs due to resistance and inductance of a compressor motor by estimating a stroke with a counter electromotive force induced by a searching coil. Furthermore, by leaving errors of inductance and resistance, among all motor parameters, out of consideration in stroke estimation, a stroke estimation error can be reduced.
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Kim Hyung-Jin
Lee Chel-Woong
Lee Hyuk
Sung Ji-Won
Yoo Jae-Yoo
Donovan Lincoln
Greenblum & Bernstein P.L.C.
Paul Antony
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