| Abstract |
This paper describes a simple sensorless drive method for switched reluctance motors (SRMs) based
on the gradient of phase inductance of SRM. The phase inductance of the SRM varies with the
position of the rotor, and the gradient of the active phase inductance is zero when the stator pole of the
active phase and the rotor pole are aligned. Therefore, it is possible to drive the SRM without a
position sensor by appropriately changing the active phase when the gradient of the phase inductance
is zero. In this method, the gradient of the phase inductance can be easily computed using basic
equation from the applied voltage to the SRM and the stator current measured. Experimental results
with the laboratory test system demonstrate that it is possible to simply control the SRM without a
position sensor according to this method. |
