192 clutches and power-stop control – Clutch and gear
Patent
1989-02-28
1990-05-01
Bonck, Rodney H.
192 clutches and power-stop control
Clutch and gear
192 56R, 464 46, F16D 2104
Patent
active
049210831
ABSTRACT:
A field installable motor operator for a circuit breaker includes a bidirectionally controllable motor that is coupled through a torque limited module to a circuit breaker operating mechanism. The motor is bidirectionally driven by a transistor switching bridge that supplies output current in reversible flow directions through one of the windings of the motor to the input of a rectifier bridge that supplies the other winding with currents that flow in the same direction. The torque limited module includes a centering and spacing ring which precisely confines the clutch elements to provide consistent torque. The motor is supplied with a current pulse of 250 milliseconds duration that is longer than the time required to fully operate the breaker. The clutch slips when breaker opeation is completed and permits the motor to overrun without damage.
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Etscheidt Ronald J.
Ophaug Darrell P.
Bonck Rodney H.
Jimenez Jose W.
Square D Company
Whitelaw Nicholas
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