ABSTRACT
In principle, the reluctance motor is an unexcited salient pole synchronous motor. In a variable speed drive, often the reluctance motor does not have a damper cage. The torque of a reluctance motor is given by [See (6.28), with ¿f=0]:
This deceptively simple equation accounts only for the fundamental components of the dand ^-axis airgap field distribution in the machine, and neglects the core losses. The torque is obviously proportional to the difference but is also proportional to ratio LJL^ for given /d and ¿q. It is to be noted that these inductances include leakage inductances along the two axes; that is
and (8-3)4F so
where the inductances and are the magnetizing inductances along the d-axis and
the <7-axis respectively, and is the leakage inductance (being the same along the two axes).
