Rotating electric machine for vehicular use

A rotating electric machine for vehicular use comprising:

• a stator that includes a stator core and a stator winding wound at the stator core;
• and
• a rotor that is rotatably disposed relative to the stator and includes a rotor core formed by laminating a plurality of electromagnetic steel sheets with a plurality of magnet insertion holes formed therein and includes a plurality of permanent magnets each held in each of the plurality of magnet insertion holes to form a magnetic pole, wherein:
• each of the plurality of permanent magnets extends along a rotor axis and is formed in a shape assuming at least two different lengths along a circumference of the rotor;
• and
• the each of the plurality of permanent magnets is constituted with n (n is an integer equal to or greater than 2) types of magnet pieces set side-by-side along the rotor axis;
• and
• the n types of magnet pieces assume lengths along the circumference of the rotor that are different from one another by an extent equivalent to approximately 60°/n in electrical angle, and the n types of magnet pieces are disposed so that central lines running through centers of the magnet pieces, assumed along the circumference of the rotor, form a substantially single straight line running along the rotor axis.

A rotating electric machine for vehicular use comprising:

• a stator that includes a stator core and a stator winding wound at the stator core;
• and
• a rotor that is rotatably disposed relative to the stator and includes a rotor core formed by laminating a plurality of electromagnetic steel sheets with a plurality of magnet insertion holes formed therein and includes a plurality of permanent magnets each held in each of the plurality of magnet insertion holes to form a magnetic pole, wherein:
• each of the plurality of permanent magnets extends along a rotor axis and is formed in a shape assuming at least two different lengths along a circumference of the rotor;
• and
• the each of the plurality of permanent magnets held in one of the magnet insertion holes assumes an isosceles trapezoid shape with an upper base thereof set on one side along the rotor axis and a lower base thereof set on another side along the rotor axis viewed from a stator side;
• and
• auxiliary magnetic poles are formed for reluctance torque generation among a plurality of magnetic poles formed with the plurality of permanent magnets.

A rotating electric machine for vehicular use comprising:

• a stator that includes a stator core and a stator winding wound at the stator core;
• and
• a rotor that is rotatably disposed relative to the stator and includes a rotor core formed by laminating a plurality of electromagnetic steel sheets with a plurality of magnet insertion holes formed therein and includes a plurality of permanent magnets each held in each of the plurality of magnet insertion holes to form a magnetic pole, wherein:
• each of the plurality of permanent magnets extends along a rotor axis and is formed in a shape assuming at least two different lengths along a circumference of the rotor;
• and
• the plurality of permanent magnets are each constituted with a plurality of magnet pieces each forming an isosceles trapezoid shape including a first base and a second base;
• the plurality of magnet pieces constituting each of the plurality of permanent magnets are disposed so that first bases of the plurality of magnet pieces along the circumference of the rotor at two ends located on one side and another side faces opposite each other along the rotor axis and second bases of the plurality of magnet pieces along the circumference of the rotor faces opposite each other at a longitudinal center of the rotor axis, and the plurality of magnet pieces are disposed so that central lines running through centers of the plurality of magnet pieces assumed along the circumference of the rotor, form a substantially single straight line along the rotor axis;
• and
• auxiliary magnetic poles are formed for reluctance torque generation among the plurality of magnetic poles formed with the plurality of permanent magnets.