Sensorless speed control of DC machine

In this paper a Kalman filter based state feedback controller of a DC machine is designed and implemented in a hardware. A Kalman filter is used to estimate the speed and armature current from noisy measurement of armature current. A state feedback control is designed and simulated in Matlab. The controller designed is implemented in dSPACE. A chopper circuit is designed and fabricated to drive a DC motor. Sensor less speed control is implemented in real time. Experimental results show satisfactory speed and load response.