TY - GEN
T1 - Inductance testing according to the new IEEE std 1812–Application and possible extensions for IPM machines
AU - Rallabandi, Vandana
AU - Taran, Narges
AU - Ionel, Dan M.
AU - Zhou, Ping
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/11/3
Y1 - 2017/11/3
N2 - Equivalent circuit parameters are very important for permanent magnet synchronous machines since they serve as the basis for performance estimation and implementation of power electronic drives controls. Specified in the newly approved IEEE Std 1812, a short-circuit test can be employed, in combination with an open-circuit measurement, in order to determine the back emf and the synchronous inductance. In this paper, it is shown that for interior permanent magnet (IPM) machines this approach can be used only to determine the d-axis inductance and additional and separate measurements are required for the q-axis inductance. In this respect, one method widely used in industry, which involves locked-rotor measurements at variable voltage and constant frequency supply, is studied in detail. Other lockedrotor methods based on DC current supply and static torque versus rotor position measurements are introduced for determining q-axis inductance in combination with the standardized open-circuit and short-circuit tests. Test results on an IPM motor design with non-sinusoidal back emf, relatively high torque ripple, and low leakage for the IEEE Std 1812 approach and the newly proposed method for inductance determination are both compared with those from finite element (FE) based simulations.
AB - Equivalent circuit parameters are very important for permanent magnet synchronous machines since they serve as the basis for performance estimation and implementation of power electronic drives controls. Specified in the newly approved IEEE Std 1812, a short-circuit test can be employed, in combination with an open-circuit measurement, in order to determine the back emf and the synchronous inductance. In this paper, it is shown that for interior permanent magnet (IPM) machines this approach can be used only to determine the d-axis inductance and additional and separate measurements are required for the q-axis inductance. In this respect, one method widely used in industry, which involves locked-rotor measurements at variable voltage and constant frequency supply, is studied in detail. Other lockedrotor methods based on DC current supply and static torque versus rotor position measurements are introduced for determining q-axis inductance in combination with the standardized open-circuit and short-circuit tests. Test results on an IPM motor design with non-sinusoidal back emf, relatively high torque ripple, and low leakage for the IEEE Std 1812 approach and the newly proposed method for inductance determination are both compared with those from finite element (FE) based simulations.
KW - D-axis
KW - IEEE std 1812
KW - Inductance
KW - Parameter estimation
KW - Permanent magnet machine
KW - Q-axis
KW - Short-circuit test
UR - http://www.scopus.com/inward/record.url?scp=85041406077&partnerID=8YFLogxK
U2 - 10.1109/ECCE.2017.8096742
DO - 10.1109/ECCE.2017.8096742
M3 - Conference contribution
AN - SCOPUS:85041406077
T3 - 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017
SP - 4302
EP - 4308
BT - 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017
Y2 - 1 October 2017 through 5 October 2017
ER -