USE OF CHAIN MATHEMATICAL MODELS IN COMPUTER-AIDED DESIGN OF D.C.MOTORS WITH FERRITE MAGNETS

The work covers the automobile d.c.motors (DCM) with excitation from ferrite magnets (FM). The aim is to develop the methods for computer-aided design of DCM with FM according to the chain mathematical models enabling to take real distribution of the magnetic fluxes in the designed machines into consideration and assuming a possibility to model the different design modifications of the specified motors including ones which are not yielded to the design with traditional methods. The chain mathematical model of DCM with FM based on the real distribution of the magnetic fluxes in machine has been developed. The methods for design of DCM with FM taking local demagnetization factor of the poles into consideration and enabling to evaluate the influence of the separate constructive and physical parameters on the output characteristics of machine has been developed. The methods of selecting optimal physical and geometric parameters for usual bimagnetic ferrite poles have been developed. The design of DCC with FM with segment case yoke enabling to prevent the demagnetization of poles and to improve the starting characteristics of machine has been proposed. The recommendations on the use of the chain mathematical models in CAD of DCC with FM and also recommendation on the prevention of the demagnetization in the ferrite poles have been introduced at the enterprise of the Joint-Stock Company "AZTE" (t. Rubtsovsk)Available from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio