Predicting core losses and efficiency of SRM in continuous current mode of operation using improved analytical technique

• Continuous current method for Switched Reluctance Motor (SRM) is explained.
• An improved analytical technique is presented for SRM core loss calculation.
• SRM losses in discontinuous and continuous current operation modes are presented.
• Effect of mutual inductances on SRM performance is investigated.

In applications in which the high torque per ampere at low speed and rated power at high speed are required, the continuous current method is the best solution. However, there is no report on calculating the core loss of SRM in continuous current mode of operation. Efficiency and iron loss calculation which are complex tasks in case of conventional mode of operation is even more involved in continuous current mode of operation. In this paper, the Switched Reluctance Motor (SRM) is modeled using finite element method and core loss and copper loss of SRM in discontinuous and continuous current modes of operation are calculated using improved analytical techniques to include the minor loop losses in continuous current mode of operation. Motor efficiency versus speed in both operation modes is obtained and compared.