New circuits for emulating switched reluctance motor windings

摘要

This study sets forth two new universal circuits capable of emulating the behaviour of non-linear inductance, which are composed of only off-the-shelf circuit devices. One of the proposed inductor emulators is dependent on a controllable resistor whose resistance value is programmable, while the other is carried out by using a multiplier to produce the emulator current. The values of the controllable resistance and the input voltage of the multiplier can be easily computed according to the requirement through digital signal processing techniques by means of digital signal processor chip. The phase inductance of switched reluctance motor (SRM) winding is of high non-linearity due to doubly salient structure and magnetic saturation. Based on the analytical expression of phase inductance, the two proposed universal inductor emulators are applied to mimic the characteristics of SRM windings. The experimental and simulated results of the winding emulators provide the conclusive evidences for validating their practicability. Moreover, the emulators for the whole SRM drive system are designed and the corresponding experimental results further verify the correctness of the proposed SRM winding emulators.