Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1997-03-17
1998-06-09
Sircus, Brian
Electricity: motive power systems
Induction motor systems
Primary circuit control
318806, H02P 534
Patent
active
057640238
ABSTRACT:
A variable frequency motor drive incorporating a circuit interrupter includes a rectifying circuit for converting incoming AC power to DC power and an inverting circuit for converting the DC power to controlled AC power in response to control signals. A control circuit implements a preset control routine to control operation of the inverting circuit to drive a motor in accordance with desired operating parameters. A circuit interrupter is coupled between the source of AC power and the rectifying circuit and includes an actuator for interrupting power to the drive in response to interrupt command signals from the motor control circuit. The motor drive includes a switching circuit and a capacitive circuit for powering the circuit interrupter. The drive control circuitry monitors operation of the drive and the motor and when conditions require removal of power to the drive, the control circuitry commands the switching circuit to close, energizing the circuit interrupter and thereby removing power to the drive. The circuit interrupter includes a manual disconnect for selectively removing power to the drive. The manual disconnect can be locked out for servicing of the motor or the drive.
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Allen Bradley Company, Inc.
Horn John J.
Miller John M.
Sircus Brian
Yoder Patrick S.
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