TY - GEN
T1 - Demodulation approach for slowly sampled sensorless field-oriented control systems enabling multiple-frequency injections
AU - Roetzer, Marco
AU - Vollmer, Ulrich
AU - Kennel, Ralph
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/11/2
Y1 - 2016/11/2
N2 - This paper describes a demodulation approach based on the least squares method for a saliency based position estimation in slowly sampled field-oriented control systems. The proposed approach focuses on the sensorless control of electrical drives in which the sample rate of the control task is chosen slower than both the maximum possible update rate of the phase voltages and the maximum possible sample rate of the phase current measurement by a multiple. Under those conditions it is possible to inject multiple-frequency carrier signals between two successive control sampling instances without affecting the control. Furthermore, a combined demodulation of these signals is enabled by exploiting the constant manipulated variables of the field-oriented control system during the injection sequence. With the proposed method the signal-to-noise-ratio (SNR) of the calculated rotor position as well as the acoustic noise produced by signal injections can be optimized. The approach is implemented in a field-oriented control for permanent magnet synchronous machines (PMSM) and is verified in experiments.
AB - This paper describes a demodulation approach based on the least squares method for a saliency based position estimation in slowly sampled field-oriented control systems. The proposed approach focuses on the sensorless control of electrical drives in which the sample rate of the control task is chosen slower than both the maximum possible update rate of the phase voltages and the maximum possible sample rate of the phase current measurement by a multiple. Under those conditions it is possible to inject multiple-frequency carrier signals between two successive control sampling instances without affecting the control. Furthermore, a combined demodulation of these signals is enabled by exploiting the constant manipulated variables of the field-oriented control system during the injection sequence. With the proposed method the signal-to-noise-ratio (SNR) of the calculated rotor position as well as the acoustic noise produced by signal injections can be optimized. The approach is implemented in a field-oriented control for permanent magnet synchronous machines (PMSM) and is verified in experiments.
KW - Carrier Signal Injection
KW - Multiple-Frequency Injection
KW - Permanent magnet machines
KW - Self-Sensing
KW - Sensorless Control
UR - http://www.scopus.com/inward/record.url?scp=85002187751&partnerID=8YFLogxK
U2 - 10.1109/IAS.2016.7731861
DO - 10.1109/IAS.2016.7731861
M3 - Conference contribution
AN - SCOPUS:85002187751
T3 - IEEE Industry Application Society, 52nd Annual Meeting: IAS 2016
BT - IEEE Industry Application Society, 52nd Annual Meeting
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 52nd Annual Meeting on IEEE Industry Application Society, IAS 2016
Y2 - 2 October 2016 through 6 October 2016
ER -
