Rotary electric machine
AssigneeHonda Motor Co., Ltd.
InventorsManabu Yazaki, Shigeru Tajima, Shoei Abe, Yoshihisa Kubota, Sho Yaegaki
Life of this patent
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Abstract
A rotor of a rotary electric machine includes a first magnet and a fourth magnet whose magnetic fields are oriented in radial directions of a stator, and a second magnet and a third magnet whose magnetic fields are oriented in circumferential directions of the stator. In the stator, slots are formed between adjacent ones of teeth portions. An electromagnetic coil is provided in the slots. A distal end on an inner circumferential side of the electromagnetic coil is offset from an inner circumferential side end part of a base portion, which is a part of the teeth portion, toward a yoke portion.
Claims9
A rotary electric machine, comprising:
- a stator including a yoke portion configured in an annular shape, and a plurality of teeth portions configured to protrude from a circumferential edge part of the yoke portion in a radial direction of the yoke portion, and in which an electromagnetic coil is provided in slots formed between adjacent ones of the teeth portions;
- and
- a rotor configured to retain a plurality of permanent magnets facing toward the teeth portions,
- wherein the plurality of permanent magnets are configured to include a same number of a first magnet in which a magnetic field thereof is oriented in a radially outward direction of the yoke portion, a second magnet adjacent to the first magnet and in which a magnetic field thereof is oriented in a clockwise direction of the yoke portion, a third magnet adjacent to the first magnet and in which a magnetic field thereof is oriented in a counterclockwise direction of the yoke portion, and a fourth magnet adjacent to the third magnet and in which a magnetic field thereof is oriented in a radially inward direction of the yoke portion,
- the teeth portions each include a base portion configured to protrude from an inner circumferential edge part of the yoke portion in the radially inward direction of the yoke portion, and a flange portion provided at a distal end of the base portion on an inner circumferential side, and configured to be wider than the base portion,
- a distal end position on an inner circumferential side of the electromagnetic coil inside the slots is offset from an inner circumferential side end part of the base portion toward the yoke portion, and
- an offset amount of the electromagnetic coil is 5% to 11% of a total length of any of the teeth portions, from an inner circumferential side end part of the flange portion.
Dependencies are inferred from the claim text.