Improvements in permanent magnet synchronous machines with delta-connected winding

Compared with wye-connected winding machine, the delta-connected shows merits in wider constant power speed range (CPSR) and higher efficiency because of the full utilization of terminal voltage, which is promising for electric vehicles (EVs), industries and domestic appliances, etc. However, circulating loss caused by triple-order harmonics impedes the application of delta-connected winding in permanent magnet synchronous machines (PMSMs). This paper discusses the advantages of delta-connected winding, and proposes an optimal design methodology on interior permanent magnet (IPM) rotors to minimize the triple-order harmonics, aiming to arouse the awareness of adopting delta connection in PMSMs for higher performance. A 22kW IPMSM prototype with delta-connected winding is manufactured, and the minimized triple order harmonics and super premium efficiency (IE4) are verified by experiments.

[1]  Mihail Popescu,et al.  Adjustable Flux Three-Phase AC Machines With Combined Multiple-Step Star-Delta Winding Connections , 2010, IEEE Transactions on Energy Conversion.

[2]  Nady Boules.  Prediction of No-Load Flux Density Distribution in Permanent Magnet Machines , 1985, IEEE Transactions on Industry Applications.

[3]  Anibal T. de Almeida,et al.  Stator Winding Connection-Mode Management in Line-Start Permanent Magnet Motors to Improve Their Efficiency and Power Factor , 2013 .

[4]  Dianguo Xu,et al.  Investigation of $d$- and $q$-Axis Inductances Influenced by Slot-Pole Combinations Based on Axial Flux Permanent-Magnet Machines , 2014, IEEE Transactions on Industrial Electronics.

[5]  Hamid A. Toliyat,et al.  Wide Operational Speed Range of Five-Phase Permanent Magnet Machines by Using Different Stator Winding Configurations , 2012, IEEE Transactions on Industrial Electronics.

[6]  Juha J. Pyrhönen,et al.  Effect of Slot-and-Pole Combination on the Leakage Inductance and the Performance of Tooth-Coil Permanent-Magnet Synchronous Machines , 2013, IEEE Transactions on Industrial Electronics.

[7]  Thomas A. Lipo,et al.  A new inverter control scheme for induction motor drives requiring wide speed range , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[8]  João A. C. Fong,et al.  Standards for Efficiency of Electric Motors , 2011, IEEE Industry Applications Magazine.

[9]  J. De La Ree,et al.  Magnet shaping to reduce induced voltage harmonics in PM machines with surface mounted magnets , 1991 .

[10]  Roberto H. Moncada,et al.  Analysis of Negative-Saliency Permanent-Magnet Machines , 2010, IEEE Transactions on Industrial Electronics.

[11]  Chris Gerada,et al.  Induction Motors Versus Permanent-Magnet Actuators for Aerospace Applications , 2014, IEEE Transactions on Industrial Electronics.

[12]  Eckart Nipp,et al.  Permanent magnet motor drives with switched stator windings , 1999 .

[13]  Emmanuel B. Agamloh,et al.  An Overview of Efficiency and Loss Characterization of Fractional Horsepower Motors , 2013, IEEE Transactions on Industrial Electronics.

[14]  J.M. Miller,et al.  Design considerations for an automotive integrated starter-generator with pole-phase modulation , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[15]  T. Kume,et al.  A wide constant power range vector controlled AC motor drive using winding changeover technique , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

[16]  Gianmario Pellegrino,et al.  Direct-Flux Vector Control of IPM Motor Drives in the Maximum Torque Per Voltage Speed Range , 2012, IEEE Transactions on Industrial Electronics.

[17]  Dieter Gerling,et al.  Skewing effect on the PM Flux-Linkage high harmonics of the PM machines with delta winding , 2009, 2009 13th European Conference on Power Electronics and Applications.