Electric vehicle using a motor

• US 6,759,778 B2
• Filed: 11/28/2001
• Issued: 07/06/2004
• Est. Priority Date: 02/23/1996
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Nishiyama, Noriyoshi, Murakami, Hiroshi, Nakamura, Tomokazu, Ikkai, Yasufumi, Honda, Yukio, Kawano, Shinichiro
• Primary Examiner(s): MULLINS, BURTON S
• Application Number:
  US09/998,770
• Publication Number:
  US 20020070619A1
• Time in Patent Office: 951 Days
• Field of Search: 310/156.58, 310/254, 310/261, 180/65.1, 180/65.5
• US Class Current: 310/156.53
• CPC Class Codes: H02K 1/148 Sectional cores H02K1/141 takes precedence
• CPC Class Codes: H02K 1/276 Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
• CPC Class Codes: H02K 1/2766 having a flux concentration effect
• CPC Class Codes: H02K 21/16 having annular armature cores with salient poles with homopolar co-operation H02K21/20
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility

Abstract

The invention relates to a motor comprising a stator core having plural teeth and slots provided among the teeth, a winding applied on the teeth by a single turn, and a rotor incorporating plural permanent magnets, which is rotated and driven by utilizing reluctance torque in addition to magnet torque. By turning thus divided teeth by a single winding, the occupation rate of the winding in the slots can be raised. As a result, a motor of small size and large output can be presented.

Claims

1. An electric vehicle comprising:

an axle,

wheels supported on said axle,

a drive unit for rotating said axle,

a power supply unit for feeding electric power to said drive unit,

wherein said drive element includes a motor,

said motor includes a stator core, said stator core has 3n teeth, where n is a natural number, a concentrated winding applied over each tooth part of said teeth, and

a rotor including 2n permanent magnets.

2. An electric vehicle comprising:

an axle,

wheels supported on said axle,

a drive unit for rotating said axle, and

a power supply unit for feeding electric power to said drive unit,

wherein said drive unit includes a motor,

said motor includes a stator core and said stator core has 3n teeth where n is a natural number,

a concentrated winding applied over each tooth part of said teeth, and

a rotor including a pluraliry of 2n permanent magnets,

said plurality of 2n permanent magnets are arranged around a shaft of said motor,

at least one of said plurality of 2n permanent magnets includes a magnet forward portion and a magnet backward portion, and

wherein said magnet forward portion is angled from said stator core towards said shaft such that a first end of said magnet forward position is closer to said stator core than a second end of said magnet forward portion, said magnet backward portion is angled from said stator core towards said shaft such that a second en of said magnet backward portion is closer to said stator core than a first end of said magnet forward portion, said second end of said magnet forward portion being coupled to said first end of said magnet forward portion.

3. An electric vehicle comprising:

an axle,

wheels supported on said axle,

a drive unit for rotating said axle, and

a portion supply unit for feeding electric power to said drive unit,

wherein said drive unit includes a motor,

said motor includes a stator core and said stator core has 3n teeth where n is a natural number, a concentrated winding applied over each tooth part of said teeth, and

a rotor including a plurality of 2n permanent magnets,

said plurality of permanent magnets are arranged around a shaft of said motor and;

at least one of said plurality of permanent magnets has a side which is angled from said stator core towards said shaft.

4. An electric vehicle comprising:

an axle,

wheels supported on said axle,

a drive unit for rotating said axle,

a power supply unit for feeding electric power to said drive unit,

wherein said drive unit includes a motor and an engine,

said motor includes a stator core and said stator core has 3n teeth where n is a natural number, a concentrated winding applied over each tooth part of said teeth; and

a rotor including a plurality of 2n permanent magnets.

5. An electric vehicle comprising:

an axle,

wheels supported on said axle,

a drive unit for rotating said axle,

a power supply unit for feeding electric power to said drive unit,

wherein said drive unit includes a motor and an engine,

said motor includes a stator core and said stator core has 3n teeth where n is a natural number, a concentrated winding applied over each tooth part of said teeth;

a rotor including a plurality of 2n permanent magnets, and

a first outer periphery portion of said rotor if of a different shape than a second outer periphery portion of said rotor.