Abstract
Halbach array is a hot research topic for motor researchers in recent years. With the aid of finite element analysis method, the traditional Halbach, uneven thickness Halbach and soft magnetic Halbach are compared and studied under the same amount of permanent magnets. The air gap magnetic density, AC-DC axis inductance and reluctance torque of the three Halbach arrays are analyzed. The simulation results show that the traditional Halbach motor has the largest air gap magnetic density but does not have reluctance torque. The air gap magnetic density of Halbach motor with nonuniform thickness and unequal thickness is the smallest, but reluctance torque is generated due to unequal inductance of AC and DC axis. The motor with soft magnetic Halbach not only has larger air gap magnetic density, but also has larger reluctance torque.
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