Double drive shaft motor of magnetic flux modulation type

摘要

In a double drive shaft motor, a stator and a field rotor are arranged at a radially outer side of a magnetic modulation rotor. The stator and the field rotor are arranged in series in an axial direction of the motor. This structure increases an amount of a winding coil of the stator and magnets in the field rotor, and an output torque of the motor. When a field magnetic flux passes through soft magnetic material members in the magnetic modulation rotor, because the generation and the reception of the magnetic flux can occur at a radially same side of the magnetic modulation rotor, this structure cancels an eddy current generated in the soft magnetic members and supporting members made of non-magnetic metal which tightly support the soft magnetic member. This structure provides a reduced axial size of the motor with high performance.

主权项

1. A double drive shaft motor of a magnetic flux modulation type comprising:
a magnetic modulation rotor comprising a plurality of soft magnetic material members forming magnetic flux paths arranged at regular intervals in a circumferential direction of the magnetic modulation rotor; a stator having a multi-phase winding of m magnetic poles, where m is an even number, facing the magnetic modulation rotor and being arranged at one of a radially inner side and a radially outer side of the magnetic modulation rotor so that the stator faces the magnetic modulation rotor; and a field rotor having a plurality of n field magnetic poles, where n is an even number, arranged at the radially same side of the stator, as the magnetic modulation rotor so that the field rotor and the stator are axially arranged in series, wherein the soft magnetic material members of the magnetic modulation rotor are arranged along a circumferential direction of the magnetic modulation rotor at regular intervals to radially face the stator and the field rotor, and the stator, the field rotor and the magnetic modulation rotor satisfy the following relationship:
k=(m+n)/2,  (1),where k is the number of the soft magnetic material members.