Permanent magnet three phase machine for high speed applications having low vibration and low resistive losses
AssigneeKoninklijke Philips N.V.
InventorRUSSELL HUGHES NORRIS
Life of this patent
Estimating the term…
Abstract
A compact three-phase permanent magnet rotary machine having minimal reluctance torque and electromagnetic torque ripple, and maximum energy efficiency and starting torque per unit volume of winding, comprises an armature having 3(2n+1) ferromagnetic poles and slots, where n is an integer of 1 or more, and a permanent magnet assembly having either 2, 4 or 6 permanent magnet poles. Each of the three phases of the winding comprises multiple coils, each wound about a respective ferromagnetic pole and occupying a pair of slots located immediately on each side of a respective pole. The coils of a particular phase are located within a sector of the circular array of ferromagnetic poles encompassing 2n+1 poles.
Claims9
A three-phase permanent magnet rotary electrical machine comprising:
- an armature having a ferromagnetic core with 3(2n+1) protruding ferromagnetic poles arranged in a circular array separated from each other by the same number of slots located interstitially between said ferromagnetic poles, where n is an integer of 1 or more;
- a permanent magnet assembly having a circular array of only either two, four or six magnetic poles;
- a means for mounting said armature and said permanent magnet assembly for relative rotation with respect to each other;
- and
- a three-phase coil means mounted on said armature within said slots, each of the three phases of said coil means comprising multiple coils, each coil being wound about a respective ferromagnetic pole and each said pole being wound with a coil of a single phase.
Dependencies are inferred from the claim text.