Core loss analysis of transverse flux tubular motor in variable-speed reciprocating periodic motion mode

As a novel tubular motor, the merits of transverse flux tubular motor different from other traditional linear motors are as follows: there is no competition between the space requirement of flux carrying core irons and the space occupied by armature windings. It can increase the force density due to the magnetic load and the electric load are decoupled. Transverse flux tubular motor seems to be suitable for some fields requiring high force density. This paper investigates the stator core loss of transverse flux tubular motor. The influences on the stator core loss are analyzed in detail, including the speed, load current, and the lead-lag control load current. Besides, the calculation of core loss in a variable speed reciprocating periodic motion mode is given the special attention. It is proposed a method of calculating the variable speed reciprocating periodic motion of the stator core loss in this paper. In order to verify the accuracy of calculation, the core loss measurement is designed and the comparison results are analyzed.