Motor, method for manufacturing motor, and motor drive controller
A motor comprising a motor-wiring bus bar including a plurality of annular ring conductors connecting lead wires of the motor including a stator in which a plurality of stator cores having the lead wires is arranged in a circle or connecting the lead wires and a power line together and a plurality of terminals attached to the ring conductors. The ring conductors are different in diameter and arranged concentrically on a same plane.
1. A three-phase permanent-magnet motor, comprising:
a distributed-coil stator,
wherein:
said motor is operable to be driven with a rectangular-wave current; and wherein S/2 mp=1;
where S is number of slots, m is number of phases of said motor, and p≧2 and 1p is number of poles; and
when p is an even number, a cycle of angle width of teeth is expressed as 360/S×4 and,
when p is an odd number, said cycle of angle width of teeth is expressed as 360/S×6.
2. The permanent-magnet motor of claim 1 , wherein:
with respect to a kind of angle width of teeth in one cycle,
when p is an even number, said kind of angle width of teeth in one cycle is set to three kinds, and
when p is an odd number, said kind of angle width of teeth in one cycle is set to four kinds;
and with respect to combination of teeth in one cycle,
teeth of odd-number are set to same angle width and,
teeth of even-number are set to different angle width respectively.
3. The permanent-magnet motor of claim 1 , wherein:
with respect to a kind of angle width of teeth in one cycle,
when p is an even number, said kind of angle width of teeth in one cycle is set to three kinds, and
when p is an odd number, said kind of angle width of teeth in one cycle is set to four kinds;
and with respect to combination of teeth in one cycle,
teeth of even-number are set to same angle width and,
teeth of odd-number are set to different angle width respectively.
4. The permanent-magnet motor of claim 1 , wherein, every other pole is wound, with one coil for one slot, so that voltages induced in coils are equal in phase.
5. The permanent-magnet motor according to claim 2 , wherein, when θ is equally spaced angle width and α is a range of possible values for said angle width of teeth, said range of α is expressed as a ·θ≦α≦b·θ, where coefficients a and b are determined by torque constant or reduction ratio of cogging-torque.
6. The permanent-magnet motor according to claim 3 , wherein, when θ is equally spaced angle width and α is a range of possible values for said angle width of teeth, said range of α is expressed as a ·θ≦α≦b·θ, where coefficients a and b are determined by torque constant or reduction ratio of cogging-torque.