Control device of deep-sea electric motor

H - Electricity – 02 – K

Patent

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Details

318/63, 309/7, 3

H02K 11/00 (2006.01) B63C 11/52 (2006.01) H02K 5/132 (2006.01) H02K 15/12 (2006.01)

Patent

CA 1304776

ABSTRACT OF THE DISCLOSURE A control device for a deep-sea electric motor comprising: a power circuit which supplies a variable power to a primary winding of the motor; a pressure detector which detects a pressure of sea water; a timer for counting a time after stopping the motor; an arithmetic unit which calculates a time required for a temperature of an oil sealed in the motor to drop and reach a predetermined low temperature; a comparator circuit which outputs a signal when a time counted by the timer is coincident with a time obtained by the arithmetic unit a signal discrimination circuit which outputs a heating mode signal corresponding to the pressure of sea water by receiving the output of the comparator circuit and an operation mode signal by receiving an operation signal of the motor and a power control circuit which controls the power circuit by receiving each mode signal of the signal discrimination circuit, and cause the power circuit to supply a predetermined power lower than that during the operation to the primary winding of the motor; whereby a predetermined power of low value is supplied to the primary winding of the motor when a predetermined time has elapsed without operation of the motor.

562093

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