Towards design of electrical machines from given air gap field

Purpose:
The purpose of this paper is to introduce a reverted way to design electrical machines. The authors present a work flow that systematically yields electrical machine geometries from given air gap fields.

Design/methodology/approach:
The solution process exploits the inverse Cauchy problem. The desired air gap field is inserted to this as the Cauchy data, and the solution process is stabilized with the aid of linear algebra.

Findings:
The results are verified by solving backwards the air gap fields with in the standard way. They match well with the air gap fields inserted as an input to the system.

Originality/value
The paper reverts the standard design work flow of electrical motor by solving directly for a geometry that yields the desired air gap field. In addition, a stabilization strategy for the underlying Cauchy problem is introduced.