TY - GEN
T1 - Anisotropy-based position estimation for highly-saturated permanent magnet synchronous machines in slowly-sampled control systems
AU - Roetzer, Marco
AU - Vollmer, Ulrich
AU - Kennel, Ralph
N1 - Publisher Copyright:
© assigned jointly to the European Power Electronics and Drives Association & the Institute of Electrical and Electronics Engineers (IEEE).
PY - 2017/11/6
Y1 - 2017/11/6
N2 - This paper presents an anisotropy-based position estimation approach taking advantage of saturation effects in permanent magnet synchronous machines (PMSM). Due to magnetic anisotropies of the electrical machine, current responses to high-frequency voltage excitations contain rotor position information. Therefore, the rotor position can be estimated by means of these current responses. The relation between the high-frequency current changes, the applied phase voltages and the rotor position is given by the inverse inductance matrix of the machine. In this paper, an analytical model of the inverse inductance matrix considering secondary anisotropies and saturation effects is proposed. It is shown that the amount of rotor position information contained in these current changes depends on the direction of the voltage excitation and the operating point. By means of this knowledge, a position estimation approach for slowly-sampled control systems is developed. Experimental results show the effectiveness of the proposed approach.
AB - This paper presents an anisotropy-based position estimation approach taking advantage of saturation effects in permanent magnet synchronous machines (PMSM). Due to magnetic anisotropies of the electrical machine, current responses to high-frequency voltage excitations contain rotor position information. Therefore, the rotor position can be estimated by means of these current responses. The relation between the high-frequency current changes, the applied phase voltages and the rotor position is given by the inverse inductance matrix of the machine. In this paper, an analytical model of the inverse inductance matrix considering secondary anisotropies and saturation effects is proposed. It is shown that the amount of rotor position information contained in these current changes depends on the direction of the voltage excitation and the operating point. By means of this knowledge, a position estimation approach for slowly-sampled control systems is developed. Experimental results show the effectiveness of the proposed approach.
KW - Control of drive
KW - Electrical drive
KW - Permanent magnet motor
KW - Self-sensing control
KW - Sensorless control
UR - http://www.scopus.com/inward/record.url?scp=85039900054&partnerID=8YFLogxK
U2 - 10.23919/EPE17ECCEEurope.2017.8099092
DO - 10.23919/EPE17ECCEEurope.2017.8099092
M3 - Conference contribution
AN - SCOPUS:85039900054
T3 - 2017 19th European Conference on Power Electronics and Applications, EPE 2017 ECCE Europe
BT - 2017 19th European Conference on Power Electronics and Applications, EPE 2017 ECCE Europe
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 19th European Conference on Power Electronics and Applications, EPE 2017 ECCE Europe
Y2 - 11 September 2017 through 14 September 2017
ER -