Development and optimization of a tubular linear synchronous motor considering various skewing methods and eddy current losses

Electromagnetic force with minimum ripple is desirable in many applications. Therefore, the cogging force must be analyzed and solutions for its reduction must be worked out. This paper investigates two possible ways of skewing the magnets of a permanent magnet excited tubular linear synchronous motor to reduce the cogging force. In bioengineering applications, specially upper limb prostheses, minimizing losses is also an issue to prevent tissue overheating, which can lead to hemolysis and thrombogenicity. Hence, the eddy current and hysteresis losses are investigated and related to the ohmic losses.