Research on CAD technique of permanent magnet motor based on improved genetic arithmetic and field circuit combination

Genetic arithmetic (GA) is improved by adopting three measures. An optimized design programme based on improved GA is compiled with MATLAB and is applied in optimized design of 15 kW, 18.5 kW and 22 kW embedded and asynchronous startup permanent magnet synchronous motors (PMSM). It has made some certain optimized effect. A magnetic parameter-analysis programme is compiled and used for a 22 kW PMSM. The magnetic field distribution and waveform of radial airgap magnetic field are researched. Some parameters such as magnetic flux of each pole and flux leakage coefficient at no-load status are calculated. It makes a good exploration for substituting traditional design method with field-circuit combination method, which overcomes shortcoming of traditional design and improves design precision. A combinatorial software for computer assisted design (CAD) of PMSM is developed. Three functions are realized in the software, which are basic design, optimized design and magnetic field analysis of PMSM. It mainly includes modules of input, data transfer, calculation and results inquiration. It encapsulations and runs complex applications such as MATLAB and ANSYS in background only with some simple operations in the user interface. The combinatorial software assembles merits of three powerful applications and has some practicability.