Rotary electric machine with rotor having permanent magnets and stator with teeth having flange portion, expanding portion and base portion

A rotary electric machine, comprising:

• a stator including a stator core including a plurality of teeth portions;
• and
• a rotor configured to retain a plurality of permanent magnets facing toward the teeth portions,
• wherein
• the stator core comprises
• a yoke portion configured in an annular shape,
• the 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
• a slot formed between adjacent ones of the teeth portions,
• the stator comprises an electromagnetic coil provided in the slots,
• the plurality of permanent magnets are configured to include a same number of
• a first magnet in which a magnetic field of the first magnet 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 of the second magnet is oriented in a clockwise direction of the yoke portion,
• a third magnet adjacent to the first magnet and in which a magnetic field of the third magnet 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 of the fourth magnet 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, a flange portion disposed in closer proximity to the rotor than the base portion, and configured to be wider than the base portion, and an expanding portion interposed between the base portion and the flange portion, and configured to become wider in an expanding manner from the base portion toward the flange portion,
• an outer diameter of the stator core is set to 115 mm to 130 mm,
• a total length of the teeth portions lies within a range 40 mm to 45 mm,
• an angle of intersection between the base portion and the expanding portion is 108° to 130°, and
• a distance from an inner circumferential side end part to an outer circumferential side end part of the flange portion is 0.2 mm to 2.0 mm.