Patent ID: 6316896
Filing Date: 2001-11-13
Classification: H02H,H02P

Abstract:
A bypass for an A-C motor, said bypass comprising:(a) an inverter, said bypass operating in a first mode in which said inverter provides power to said motor and a second mode in which said inverter does not provide power to said motor;(b) first and second contactors, said first contactor closed and said second contactor open when said bypass is operating in said first mode; and(c) a first state machine having a closed loop having a predetermined total number of states, said first state machine in a first state when said first contactor is closed and said second contactor is open, said first state machine entering a second state when said first state machine determines that one of a predetermined number of events the occurrence of which will result in the opening of said first contactor has occurred, said second state having a predetermined period of time for which said occurring one of said predetermined number of events must continue before said first state machine enters a third state wherein said first contactor is opened to thereby stop said motor.