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23757results about "Magnetic circuit rotating parts" patented technology

Permanent magnet rotating electric machine and electric car using the same

A permanent magnet rotating electric machine comprises a stator having stator windings wound round a stator iron core and a permanent magnet rotor having a plurality of inserted permanent magnets in which the polarity is alternately arranged in the peripheral direction in the rotor iron core. The rotor iron core of the permanent magnets is composed of magnetic pole pieces, auxiliary magnetic poles, and a stator yoke, and furthermore has concavities formed on the air gap face of the magnetic pole pieces of the rotor iron core of the permanent magnets, gently tilting from the central part of the magnetic poles to the end thereof. In a permanent magnet rotating electric machine, effects of iron loss are reduced, and an electric car using highly efficient permanent magnet rotating electric machine are realized.
Owner:HITACHI ASTEMO LTD

Rotary electric machine and a rotor of the same

ActiveUS20050040721A1Large armature reactionReliability to demagnetizationSynchronous generatorsMagnetic circuit rotating partsElectric machineElectrical polarity
In a rotor for a rotary electric machine, a predetermined number of main pole magnets and a predetermined number of yoke magnets are fixed in contact with a hub. Each main pole magnet is magnetized so that its radial inside portion and its radial outside portion have the opposite polarity from each other, of north pole and south pole. Also, each main pole magnet has its radial inside and radial outside polarities reversed from its closest main pole magnets. The yoke magnets are disposed to allow magnetic flux to flow through circumferential surfaces of the main pole magnets. The hub is provided as a heat radiating member and made of metal having high heat conductivity. The hub includes an inner cylindrical portion and an outer cylindrical portion, and forms an air passage spaces.
Owner:DENSO CORP
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