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Class Information
Number: 318/775
Name: Electricity: motive power systems > Induction motor systems > Primary circuit control > Plural speed > Pole changing > Single phase motor > Separate primary running winding for each pole number, alternately energized
Description: Subject matter wherein each predetermined number of poles is produced by the energization of a separate primary winding.

Patents under this class:

Patent Number Title Of Patent Date Issued
8305026 2 speed 2/4-pole PSC/PSC motor with independent main windings and shared auxiliary winding Nov. 6, 2012
7911175 Two speed induction motor with tapped auxiliary winding Mar. 22, 2011
7602594 Motor control apparatus and motor control method Oct. 13, 2009
7518837 Control device for soft starting and protecting overload of motor Apr. 14, 2009
6930464 Driving circuit for improving starting of hybrid induction motor and method thereof Aug. 16, 2005
6891294 Electric motor vehicle comprising same May. 10, 2005
6815926 Single phase induction motor with partially shared windings Nov. 9, 2004
6175208 High efficiency permanent split capacitor motor for driving a compressor Jan. 16, 2001
6175209 2/4-pole PSC motor with shared main winding and shared auxiliary winding Jan. 16, 2001
6121746 Speed reduction switch Sep. 19, 2000
6008616 Pole change induction motor and control apparatus and method for the same Dec. 28, 1999
5990653 Method for controlling the speed of a single-phase asynchronous induction motor Nov. 23, 1999
5896021 Removal of moisture from induction motors Apr. 20, 1999
5541483 Control system and method for controlling a DC motor or generator Jul. 30, 1996
5170110 Regulator mechanism for a two-speed motor Dec. 8, 1992
5159255 Energy conserving electric induction motor field control method and apparatus Oct. 27, 1992
5103153 Control equipment for multi-speed electric motors Apr. 7, 1992
5077512 Energy conserving electric motor control method and apparatus Dec. 31, 1991
5075611 Single phase AC motor control device Dec. 24, 1991
5041775 Speed control for multitap induction motor Aug. 20, 1991
4947098 Regulator mechanism for a two-speed motor Aug. 7, 1990
4823067 Energy conserving electric induction motor control method and apparatus Apr. 18, 1989
4806838 A.C. induction motor energy conserving power control method and apparatus Feb. 21, 1989
4472670 Simplified connections to control speed relating to electrical rotating machinery Sep. 18, 1984
4384312 Line break protection for multispeed motor May. 17, 1983
4348626 Two-speed single phase motor with centrifugal switch Sep. 7, 1982
4263540 Two-speed refrigerant motor compressor Apr. 21, 1981
4103213 Two speed single phase induction motor Jul. 25, 1978
4066937 Control circuit for a two speed single phase motor Jan. 3, 1978
3978382 Control apparatus for two-speed, single phase compressor Aug. 31, 1976

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