Analysis of the output torque of a superconducting torquer for drift test

The superconducting torquer is one of the key components of the torque feedback loop, which is used to carry out the drift test of a superconducting magnetic suspension device to evaluate its performance. The aim of this paper is to analyze the output torque of the superconducting torquer and find out its function relationship with the input current. 3-D magnetic field finite element analysis (FEA) method has been used. The results show that the torque generated by the superconducting torquer is proportional to the square of the input current when the input current ranges from 0 to 10 A. It provides a necessary foundation for the following design of the torque feedback loop.