Starting circuit for single phase motor

Details Starting circuit for single phase motor Starting circuit for single phase motor

1975-04-04

1977-03-15

Rubinson, Gene Z.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318221E, 318221G, H02P 144

Patent

active

040126781

ABSTRACT:
A starting and running circuit for a single phase motor having a main field winding and a start field winding employing a single pole double throw switch in series with the start field winding to switch from a desired high torque starting mode to a high-efficiency running mode while overcoming the possibility of contact welding and failure of the switch upon stalling of the motor or momentary interruption in the line voltage during or immediately following starting. The single pole double throw switch is controlled by an actuation means which senses motor speed or another desired characteristic and in response to it causes the switching at the desired point.

REFERENCES:
patent: 1707424 (1929-04-01), Bailey
patent: 3725757 (1973-04-01), Ehrens et al.

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