TY - GEN
T1 - Silent injection for saliency based sensorless control by means of current oversampling
AU - Landsmann, P.
AU - Paulus, D.
AU - Dötlinger, A.
AU - Kennel, R.
PY - 2013
Y1 - 2013
N2 - Sensorless control approaches for low and zero speed determine the rotor position by injecting high frequency voltage signals. Current measurement noise and quantization necessitate a minimum amount of injection amplitude, which implies an acoustic noise emission that for many applications is unacceptable. This paper proposes to sample the current with the maximum A/D conversion frequency while processing the data with an FPGA. By means of a recursive least squares method and an algorithmic extension, high precision current slopes are calculated from low injection voltage. Experimental results show that the injection magnitude can be reduced by factor 7 to 10 compared to standard PWM centered current measurement.
AB - Sensorless control approaches for low and zero speed determine the rotor position by injecting high frequency voltage signals. Current measurement noise and quantization necessitate a minimum amount of injection amplitude, which implies an acoustic noise emission that for many applications is unacceptable. This paper proposes to sample the current with the maximum A/D conversion frequency while processing the data with an FPGA. By means of a recursive least squares method and an algorithmic extension, high precision current slopes are calculated from low injection voltage. Experimental results show that the injection magnitude can be reduced by factor 7 to 10 compared to standard PWM centered current measurement.
UR - http://www.scopus.com/inward/record.url?scp=84877588202&partnerID=8YFLogxK
U2 - 10.1109/ICIT.2013.6505705
DO - 10.1109/ICIT.2013.6505705
M3 - Conference contribution
AN - SCOPUS:84877588202
SN - 9781467345699
T3 - Proceedings of the IEEE International Conference on Industrial Technology
SP - 398
EP - 403
BT - Proceedings - 2013 IEEE International Conference on Industrial Technology, ICIT 2013
T2 - 2013 IEEE International Conference on Industrial Technology, ICIT 2013
Y2 - 25 February 2013 through 28 February 2013
ER -