Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1980-09-16
1982-09-07
Rubinson, Gene Z.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318775, 318785, 318795, H02P 118
Patent
active
043486266
ABSTRACT:
A two-speed single phase motor of the capacitor-start type is disclosed wherein the motor is switched from the start condition to the run condition by means of a single contact centrifugally actuated switch. The motor comprises high speed and low speed main windings and high speed and low speed start windings wound on the stator core and a double throw selector switch for connecting the high speed main and start windings to the terminal or the low speed main and start windings to the terminals when the motor is operated in the high speed and low speed configurations, respectively. A single pole single throw centrifugally actuated switch connected to the rotor has a single contact pair connected in series with the start capacitor and one of the terminals, and the switch contacts open when the rotor exceeds a predetermined rotational speed to disconnect the start capacitor from the circuit. The same centrifugal switch contact pair is used in both the high speed and low speed configurations. A run capacitor may be connected in series with the high speed start winding in accordance with one embodiment of the invention. In an alternative embodiment, the run capacitor may be connected in series with both the high speed and low speed start windings so that the motor operates as a capacitor-start capacitor-run motor in both the high speed and low speed configurations.
REFERENCES:
patent: 1712065 (1929-05-01), Baker
patent: 1944090 (1934-01-01), Lukens
patent: 2028230 (1936-01-01), Lyden
patent: 2464253 (1949-03-01), Morrill
patent: 2689933 (1954-09-01), Veinott
General Electric Company
Papin Joseph E.
Rubinson Gene Z.
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