Method and apparatus for heating electrical motors and like devi

Details Method and apparatus for heating electrical motors and like devi Method and apparatus for heating electrical motors and like devi

1977-05-25

1979-01-16

Schaefer, Robert K.

Electricity: motive power systems

Nonrunning, energized motor

219209, 219492, 307261, 323 18, 307 96, 307106, H02P 700

Patent

active

041351223

ABSTRACT:
A motor heat control circuit is provided for heating an electrical motor during the time of motor shutdown, with the circuit functioning to interconnect a winding of the motor with a source of alternating current voltage for substantially an entire half-cycle of the alternating current voltage but only at intervals comprising a selected plurality of cycles of the alternating current voltage. In its preferred form, the motor heat control circuit is adapted to be connected in shunt circuit with a main motor contactor normally interconnecting the motor winding with the source of alternating current voltage, and includes a controllable semi-conductor switch controlled by digital counting logic which is responsive to clock pulses developed from the alternating current voltage.

REFERENCES:
patent: 3307094 (1967-02-01), Ogle
patent: 3582712 (1971-06-01), Blair
patent: 3717804 (1972-04-01), Dikinis et al.
patent: 3774096 (1973-11-01), Hann

Affiliated with

Also associated with

Rating

Method and apparatus for heating electrical motors and like devi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for heating electrical motors and like devi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for heating electrical motors and like devi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-653317