Inductance calculation and power factor analysis of a transverse flux linear motor with double-side permanent magnet excitation
摘要
The transverse flux motor weakens the coupling relationship between electric loading and magnetic loading, so that the thrust density of the motor can be further improved. However, the complex structure and low power factor have been one of the main drawbacks of this kind motor. This paper investigated a double-side permanent magnet excited transverse flux linear motor. The calculation formula of winding main inductance and leakage inductance were deduced, and a calculation method of leakage inductance of end winding based on finite element method was proposed. The influence of permanent magnet heights and air gap length on the motor power factor characteristics were analyzed to find out the feasible approach for further improving the power factor. Finally, a prototype was developed, and an experimental platform was built. By measuring and analyzing the power factor characteristics of the prototype, the results are in consistent with theoretical prediction.