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 15kW, 18.5kW and 22kW 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 22kW PMSM. The magnetic field distribution and waveform of radial airgap magnetic field are reasearched. Some parameters such as magnetic flux of each pole and flux leakage coefficient at no-load status are caculated. It makes a good exploration for substituting traditionnal design method with field-circuit combination method, which overcomes shortcoming of traditionnal design and improves design precision. A combinatorial software for computer assisted design (CAD) of PMSM is developped. 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.