US 7,804,216 B2Granted

Permanent-magnet reluctance electrical rotary machine

AssigneesKabushiki Kaisha Toshiba, Toshiba Industrial Products Manufacturing Corporation

InventorsNorio Takahashi, Kazuto Sakai, Masanori Arata, Yutaka Hashiba, Wataru Ito, Motoyasu Mochizuki, Mikio Takabatake, Masakatsu Matsubara, Takashi Hanai

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Abstract

For an electrical reluctance rotary machine, a stator has a winding as an armature, and a rotor has permanent magnet implanting slots provided in a rotor core at lateral sides magnetic poles configured to produce reluctance torque along directions of magnetic flux passing through the magnetic poles to produce reluctance torque, and permanent magnets inserted in the permanent magnet implanting slots so as to cancel magnetic flux of the armature intersecting that magnetic flux, to control a magnetic field leaking at ends of the magnetic poles, having circumferential magnetic unevenness. The electrical reluctance rotary machine is configured to meet a relationship, such that 1.6 ≤ P × W pm R ≤ 1.9 where Wpm [mm] is a width of permanent magnet, R [mm] is a radius of the rotor, and P is the number of poles.

Claims4

Dependent claims

A permanent-magnet reluctance electrical rotary machine comprising:

a stator having a winding as an armature;
and
a rotor including a pair of permanent magnet implanting slots provided in a rotor core at both sides of a magnetic pole configured to produce reluctance torque along a direction of magnetic flux passing through the magnetic pole to produce reluctance torque, and permanent magnets inserted in the permanent magnet implanting slots, respectively, magnetization directions of the permanent magnets residing at both sides of the magnetic pole identical to each other, magnetization directions of the permanent magnets residing at both sides of an interpolar portion opposite to each other, so as to cancel magnetic flux of the armature intersecting that magnetic flux, to control a magnetic field leaking at an end of the magnetic pole, having circumferential magnetic unevenness,
wherein the electrical rotary machine is configured to meet a relationship, such that
1.6
≤
P
×
W
pm
R
≤
1.9
where Wpm [mm] is a width of the permanent magnet, R [mm] is a radius of the rotor, and P is a pole number.

11 more elements

Dependencies are inferred from the claim text.