Abstract: A motor is disclosed in which the main stator winding of, for example, a squirrel case inducting motor, is connected in series with a capacitor so that the capacitor, together with the input voltage, causes the stator core to periodically switch from a nonsaturated to a saturated condition and vice-versa so that the flux density is maintained at a uniform high level. A second stator winding is provided in parallel with the first stator winding and capacitor which second winding serves as the phase winding and causes the motor to operate as a balanced split phase motor having a high efficiency over a broad range of operating points.

Abstract: A speed switch for a motor has an electrically conductive disc which rotates with the rotor of the motor. A drag member adjacent the disc is mounted for limited pivotal movement and has a permanent magnet linked magnetically with the disc to cause electromagnetic interaction resulting in a force on the drag member which varies with the speed of rotation of the disc. A switch is operated by a movement of the drag member to actuate an alarm or to actuate a protective device for the motor. An improved latching means restrains the drag member from movement until a predetermined rotational speed of the disc is reached. A screw is mounted so that it can be advanced into the gap and withdrawn therefrom to provide a finely adjustable magnetic shunt. The adjustment of the shunt varies the magnetic latching force and thereby the speed causing actuation of the switch.

Abstract: This alternator includes a stator comprising an armature winding and a rotor comprising a permanent magnet field. A sleeve is located between the rotor and stator and comprises on its periphery alternating ferromagnetic and nonmagnetic segments. When the ferromagnetic segments are aligned with the poles of the stator, the flux linkage between the rotor and stator is maximum. When the nonmagnetic segments are aligned with the stator poles, the flux linkage is a minimum. The sleeve is shiftable through 90 electrical degrees by means of a motor. The output of the alternator may be regulated between maximum and minimum values by so shifting the sleeve.

Abstract: The instant invention relates to a simple arrangement for adjusting the output power of one or more selected windings of a multiple winding, single phase Permanent Magnet Generator (PMG) without changing the magnetization of the rotor and without modifying the main stator magnetics. Magnetic shims are inserted selectively into one or more of the stator slots and shunt increasing amounts of flux as load current increases, thereby reducing the output of the selected windings without in any way affecting the output of the remaining windings. Alternatively, such magnetic shims may be used to adjust the output of single phase, single winding PMG's that have rotors made of Rare Earth Cobalt permanent magnets which, unlike conventional magnets, cannot be demagnetized.

Abstract: A shaded pole electric motor comprising a rotor, a stator. The stator has a plurality of generally radially extending poles each with a neck portion of lesser circumferential extent than the radially innermost ends of the poles. Adjacent neck portions of the poles form a kidney slot for receiving portions of stator windings. A main winding is wound around the neck portion of each pole. A shading coil slot which has its radially innermost end nearer the pole center than its radially outermost end. A shading coil and winding is positioned in such a manner that no portion of the main winding overlies the axially outer ends of the shading coil.