ABSTRACT
Stepper motors and, in particular, claw pole stepper motors are widely applied in industrial controls (Chirikjian et al. 1999, Floresta 1990, Kenjo 1990, Pawlak 1984, Rajagopal et al. 2003, Singh 1974). In the automotive industry, these stepper motors, often called tincan or can-stack motors, have found a variety of applications, such as in the timing of fuel injectors or to adjust the amount of fuel going to the engine. Claw pole or interdigitated construction is used for this type of electrical machine, similar to the Lundell construction used in automotive alternators. Because this type of machine has a very complex 3D magnetic circuit, it is difficult to analyze using closed-form solutions. A 3D computer program for numerical solutions is necessary.
