The direct-axis
magnetic field-enhanced permanent
magnet brushless motor with wide speed regulation for vehicles and its zoned magnetic regulation control is suitable for the field of electric vehicles with wide speed regulation,
low speed,
high torque and high efficiency. Its structure is composed of
stator, rotor, non-magnetic
bushing and rotating shaft. It is characterized in that the
stator armature winding adopts distributed winding or modular winding; the rotor is uniformly embedded with permanent
magnet steel along the circumferential direction, and adopts alternating distribution
magnetization, increasing the number and thickness of the rotor quadrature axis
magnetic circuit and the permanent
magnet Steel forms a
magnetic barrier in a certain relationship. The non-magnetic
bushing holds the rotor core together and is closely connected to the shaft, resulting in a new class of direct-axis field-enhanced permanent magnet
brushless motors. The feature of the invention is that the direct-axis
inductance of this type of motor is greater than the quadrature-axis
inductance, and cooperates with the zoned magnetic regulation control, inheriting the advantages of traditional permanent magnet synchronous
power density, reliable operation, high efficiency, and
high energy density, and further reducing
copper consumption and
energy density. Iron loss improves the efficiency of the motor and solves the problem that the traditional permanent magnet synchronization is difficult to achieve
weak field control.