Abstract
This paper presents a novel initial rotor position estimation method for a surface-mounted permanent magnet synchronous motor (SPMSM) using its inherent magnetic features. Here, the initial rotor position has been estimated utilising the variation in phase inductances arising out of the unavoidable but very small saliency occurring either out of magnetic saturation of the machine or the magnet shape. Detailed investigations have been carried out to enumerate the actual magnitude of the inductances of the SPMSM with distributed armature winding and the dynamic saturation status with armature current variation. Here, 3-phase balanced voltage of higher frequency (150 Hz) is applied to the motor terminals for a short period of time (for 300 ms) and the corresponding phase currents are indirectly used to determine the rotor position. Innovative signal processing steps have been used to distinguish small differences in the 3-phase currents caused by the small differences in the phase inductances. The position is determined from the relative values of different phase currents using a novel approach. This still leads to two diametrically opposite (electrical phase) solutions for the instantaneous rotor position. To eliminate this ambiguity, two alternative methods (for pole identification) have been proposed. Extensive co-simulations of finite-element method (FEM)-based electromagnetic simulation and system simulation (for logic implementation) have been conducted. The estimation methods have been validated experimentally on a laboratory-developed prototype SPMSM that was designed and fabricated by the authors. The experimental results are found to be in excellent agreement with the FEM-based simulation results. The complete initial position estimation method takes less than 1 s of real time, which is typically less than the pre-charging time of standard commercial inverters.
Similar content being viewed by others
References
Chen Z, Tomita M, Doki S and Okuma S 2003 An extended electromotive force model for sensorless control of interior permanent-magnet synchronous motors. IEEE Trans. Ind. Electron. 50(2): 288–295
Mobarakeh B, Tabar F and Sargos F 2007 Back EMF estimation-based sensorless control of PMSM: robustness with respect to measurement errors and inverter irregularities. IEEE Trans. Ind. Appl. 43(2): 485–494
Antonello R, Ortombina L, Tinazzi F and Zigliotto M 2018 Enhanced low-speed operations for sensorless anisotropic PM synchronous motor drives by a modified back-EMF observer. IEEE Trans. Ind. Electron. 65(4): 3069–3076
Chen S, Liu G and Zhu L 2019 Sensorless startup strategy for a 315-kW high-speed brushless DC motor with small inductance and nonideal back EMF. IEEE Trans. Ind. Electron. 66(3): 1703–1714
Bierhoff M H 2017 A general PLL-type algorithm for speed sensorless control of electrical drives. IEEE Trans. Ind. Electron. 64(12): 9253–9260
Genduso F, Miceli R, Rando C and Ricco Galluzzo G 2010 Back EMF sensorless-control algorithm for high-dynamic performance PMSM. IEEE Trans. Ind. Electron. 57(6): 2092–2100
Wang Z, Lu K and Blaabjerg F 2012 A simple startup strategy based on current regulation for back-EMF-based sensorless control of PMSM. IEEE Trans. Power Electron. 27(8): 3817–3825
Mishuku Y and Hasegawa M 2017 Initial position estimation of small SPMSM for position sensorless control. In: Proceedings of the IEEE International Conference on Power Electronics and Drive Systems (PEDS)
Kulkarni A B and Ehsani M 1992 A novel position sensor elimination technique for the interior permanent-magnet synchronous motor drive. IEEE Trans. Ind. Appl. 28(1): 144–150
Mizutani R, Takeshita T and Matsui N 1998 Current model-based sensorless drives of salient-pole PMSM at low speed and standstill. IEEE Trans. Ind. Appl. 34(4): 841–846
Boussak M 2005 Implementation and experimental investigation of sensorless speed control with initial rotor position estimation for interior permanent magnet synchronous motor drive. IEEE Trans. Power Electron. 20(6): 1413–1422
Wu X et al 2017 Initial rotor position detection for sensorless interior PMSM with square-wave voltage injection. IEEE Trans. Magn. 53(11): 1–4
Wu X et al 2017 Design of position estimation strategy of sensorless interior PMSM at standstill using minimum voltage vector injection method. IEEE Trans. Magn. 53(11): 1–4
Corley M J, Lorenz R D and Sul S 1996 Rotor position and velocity estimation for a permanent magnet synchronous machine at standstill and high speeds. In: Proceedings of the IEEE Industrial Applications Conference
Kim H, Huh K, Lorenz R D and Jahns T M 2004 A novel method for initial rotor position estimation for IPM synchronous machine drives. IEEE Trans. Ind. Appl. 40(5): 1369–1378
Xuan W et al A reliable initial rotor position estimation method for sensorless control of interior permanent magnet synchronous motors. ISA Trans. 97: 116–129
Jeong Y, Lorenz R D, Jahns T M and Sul S 2003 Initial rotor position estimation of an interior permanent magnet synchronous machine using carrier-frequency injection methods. In: Proceedings of the IEEE International Conference on Electrical Machines and Drives
Jin X et al 2018 High-frequency voltage-injection methods and observer design for initial position detection of permanent magnet synchronous machines. IEEE Trans. Power Electron 33(9): 7971–7979
Zhang X, Li H, Yang S and Ma M 2018 Improved initial rotor position estimation for PMSM drives based on HF pulsating voltage signal injection. IEEE Trans. Ind. Electron. 65(6): 4702–4713
Yang S, Yang S and Hu J 2017 Initial position estimation of permanent magnet machine with low saliency ratio. IEEE Access 5: 2685–2695
Li S, Zheng S, Zhou X and Fang J 2018 A novel initial rotor position estimation method at standstill for doubly salient permanent magnet motor. IEEE Trans. Ind. Informat. 14(7): 2914–2924
Nakashima S, Inagaki Y and Miki I 2000 Sensorless initial rotor position estimation of surface permanent-magnet synchronous motor. IEEE Trans. Ind. Appl. 36(6): 1598–1603
Yan Y, Zhu J G and Guo Y G 2008 Initial rotor position estimation and sensorless direct torque control of surface-mounted permanent magnet synchronous motors considering saturation saliency. IET Electr. Power Appl. 2(1): 42–48
Wu X et al 2015 Sensorless speed control with initial rotor position estimation for surface mounted permanent magnet synchronous motor drive in electric vehicles. Energies 8: 11030–11046
Huang K, Wang L, Jiang Z and Huang S 2014 An enhanced reliability method of initial angle detection on surface mounted permanent magnet synchronous motor. In: Proceedings of the International Conference on Electrical Machines and Systems (ICEMS)
Zhaobin H, Linru Y and Zhaodong W 2014 Sensorless initial rotor position identification for non-salient permanent magnet synchronous motors based on dynamic reluctance difference. IET Power Electron. 7(9): 2336–2346
Wang G et al 2009 Initial position estimation for sensorless surface-mounted PMSM with near-zero saliency at standstill. In: Proceedings of the IEEE Vehicle Power and Propulsion Conference
O’Kelly D and Simmons S 1968 Generalized electrical machine theory. McGraw-hill
Yang Y and Gao H 2011 Initial rotor position estimation for low saliency interior permanent-magnet synchronous motor drives. In: Proceedings of the IEEE Applied Power Electronics Conference and Exposition(APEC)
Paul S and Chang J 2017 Precise estimation of initial pole position for surface permanent magnet synchronous motor based on modified reference frame method. IEEE Trans. Magn. 53(4): 1–9
Chengliang Z et al 2015 A judgment method for initial position of permanent magnet synchronous motor rotor. Patent No. CN102843091
Bing L et al 2014 A method for detecting initial position of surface mount type permanent magnet synchronous motor rotor. Patent No. CN103986394
Bing L et al 2014 A method for detecting initial position of surface PM synchronous motor. Patent No. CN104022711
Chang Y C and Tzou Y Y 2007 A new sensorless starting method for brushless DC motors without reversing rotation. In: Proceedings of the IEEE PESC Conference, pp. 619–624
Lee W J and Ki Sul S 2006 A new starting method of BLDC motors without position sensor. IEEE Tran. Ind. Appl. 42(6): 1532–1538
Jang G H, Park J H and Chang J H 2002 Position detection and start-up algorithm of a rotor in a sensorless BLDC motor utilising inductance variation. IET Electr. Power Appl. 149(2): 137–142
Cassat A M 1991 Position detection for a brushless DC motor. Patent No. US5001405A
Batzel D T 2002 Detection of rotor angle in a permanent magnet synchronous motor at zero speed. Patent No. US6441572B2
Paitandi S and Sengupta M 2014 Design, fabrication and parameter evaluation of a surface mounted permanent magnet synchronous motor. In: Proceedings of the IEEE International Conference on Power Electronics Drives and Energy Systems (PEDES)
Mukherjee P and Sengupta M 2014 Design, analysis and fabrication of a brush-less DC motor. In: Proceedings of the IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)
Rihar A, Zajec P and Voncina D 2017 Cosimulation of ansys simplerer and MATLAB/Simulink. In: Proceedings of the IEEE International Conference on Electrical Drives and Power Electronics
Fitouri M, Bensalem Y and Abdelkrim M N 2016 Modeling and detection of the short-circuit fault in PMSM using Finite Element Analysis. IFAC-PapersOnLine, 49(12): 1418–1423
Apostoai C M 2013 AC machines and drives simulation platform. In: Proceedings of the IEEE International Electric Machines and Drives Conference
Colby R S and Novotny D W 1988 An efficiency-optimizing permanent-magnet synchronous motor drive. IEEE Trans. Ind. Appl. 24(3): 104–112
Agarlita S, Coman C, Andreescu G and Boldea I 2013 Stable V/f control system with controlled power factor angle for permanent magnet synchronous motor drives. IET Electr. Power Appl. 7(4): 278–286
Tang Z, Xiong Li, Dusmez S and Akin B 2016 A new V/f-based sensorless MTPA control for IPMSM drives. IEEE Trans. Power Electron. 31(6): 4400–4415
Tu W, Xiao G, Suo C and Yang K 2017 A design of sensorless permanent magnet synchronous motor drive based on V/f control. In: Proceedings of the International Conference on Electrical Machines and Systems (ICEMS)
Ancuti R, Boldea I and Andreescu G D 2010 Sensorless V/f control of high-speed surface permanent magnet synchronous motor drives with two novel stabilising loops for fast dynamics and robustness. IET Electr. Power Appl. 4(3): 149–157
Fatu M, Teodorescu R, Boldea I, Andreescu G and Blaabjerg F 2008 I-F starting method with smooth transition to EMF based motion-sensorless vector control of PM synchronous motor/generator. In: Proceedings of the IEEE Power Electronics Specialists Conference
Stellas D 2013 Sensorless scalar and vector control of a subsea PMSM. M.S. thesis, Chalmers University of Technology, Goteborg, Sweden
Paitandi S and Sengupta M 2017 Analysis, design and implementation of sensorless V/f control in a surface-mounted PMSM without damper winding. Sadhana 42(8): 1317–1333
Acknowledgements
The authors would like to express their gratitude for the assistance received from the IIEST authorities and research colleagues at the Advanced Power Electronics Laboratory, Department of Electrical Engineering, IIEST; particularly Prof B Barman is also gratefully acknowledged.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Paitandi, S., Sengupta, M. Implementation of a novel and versatile initial rotor position estimation method on surface-mounted permanent magnet synchronous motor prototype at zero speed. Sādhanā 45, 271 (2020). https://doi.org/10.1007/s12046-020-01508-w
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/s12046-020-01508-w