US PATENT SUBCLASS 318 / 756
.~.~ With controlled electronic switch for phase reversal


Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

727  DF  INDUCTION MOTOR SYSTEMS {12}
739  DF  .~ Reversing {5}
756.~.~ With controlled electronic switch for phase reversal


DEFINITION

Classification: 318/756

With controlled electronic switch for phase reversal:

(under subclass 739) Subject matter wherein the means to change direction of the motor includes an on-off electronic device with a control terminal which operates to determine when to permit or stop the transfer of power through the device itself from a power source to the motor or through a relay actuated by the on-off device.

(1) Note. Included in this subclass for example are three phase-reversing circuits with cycloconverters or rectifier inverters.