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A single phase alternating current electric motor is provided with a main stator winding having two coil groups each including the series connection of three coils. These coil groups can be connected in series for six pole operation and in parallel for four pole operation. The coils are approximatel

A single phase alternating current electric motor is provided with a main stator winding having two coil groups each including the series connection of three coils. These coil groups can be connected in series for six pole operation and in parallel for four pole operation. The coils are approximately equally spaced around the periphery of the machine but are not of equal numbers of turns. The two coil groups are identically wound and spaced 180 mechanical degrees apart. One coil of each group has more turns and a greater span than the other two coils.

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A single phase alternating current electric motor comprising: a main stator winding wound to pass through a plurality of uniformly spaced slots in a stator and including two identical coil groups each having three series connected coils wherein all six coils are approximately equally spaced around t

A single phase alternating current electric motor comprising: a main stator winding wound to pass through a plurality of uniformly spaced slots in a stator and including two identical coil groups each having three series connected coils wherein all six coils are approximately equally spaced around the motor periphery, corresponding coils in each of said coil groups are spaced 180 mechanical degrees apart, and a first coil in each of said coil groups has a number of turns which differs from the number of turns of the other coils; means for connecting said two coil groups to form six poles for six pole motor operation; and means for connecting said two coil groups to form four poles for four pole motor operation, wherein one of said coil groups has a reversed polarity with respect to its connection for six pole operation.