Methods and apparatus for maintaining synchronization of a...

Details Methods and apparatus for maintaining synchronization of a... Methods and apparatus for maintaining synchronization of a...

2005-03-22

2005-03-22

Duda, Rina (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Terminal voltage or counter-electromotive force of...

C318S132000, C318S254100, C318S434000, C318S500000, C388S923000, C388S928100

Reexamination Certificate

active

06870337

ABSTRACT:
Methods and apparatus permit: monitoring a level of a power source that provides operating power to a control circuit, the control circuit being of a type that senses signals in windings of a polyphase motor to maintain synchronization therewith; and converting kinetic energy of the polyphase motor into operating power for the control circuit when the level has fallen below a threshold level, such that the control circuit is capable of maintaining synchronization with the polyphase motor.

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