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Detailed Design Procedures for PMSG Direct-Driven by Wind Turbines

  • Ahmed HebalaEmail author
  • Walid A. M. Ghoneim
  • Hamdy A. Ashour
Original Article

Abstract

This paper is committed to show a well-ordered system used to design a permanent magnet synchronous generator (PMSG). The fundamental focus of this work is the generators which are in gearless configuration, and in the fragmentary or couple of kilowatts power range. A straight lumped-component based model is introduced, which is utilized for fundamental investigation and design. Later, a proposed comprehensive design strategy—stated with conditions, tables, design limits and practical recommendations—are presented in full details. Likewise, a flowchart is created to be later used as a Matlab M-File code for PMSG design. The outlined strategies are then authenticated through three case studies while being compared to the result from Finite Element Method (FEM) of Maxwell package. The three case studies are firstly, comparing the effectiveness of the procedures with a PMSG presented in literature. Secondly compared to a generator from the market. And finally using the procedure to implement a 1 kw prototype generator and validate the results with it. Such comparisons have validated the proposed procedures as a contributed step-by-step simple and reliable design tool for such cluster of PMSGs.

Keywords

Finite element methods Design methodology Wind energy Permanent magnet generators 

List of Symbols

\(H_{m} , H_{s} , H_{g}\)

Flux intensity in magnet, steel, airgap (At/m)

\(L_{m} , L_{s} , L_{g}\)

Mean length of magnet, steel, airgap (m)

\(B_{m} , B_{s} , B_{g} B_{tooth} ,\), \(B_{core }\)

Flux density of magnet, steel, airgap, tooth, core (T)

\(\phi_{core}\)

Flux in core (Weber)

\(\mu_{0} ,\mu_{m} , \mu_{s}\)

Permeability of air, magnet, steel (H/m)

\(A_{m} , A_{s} , A_{g}\)

Area of magnet, steel, airgap (m2)

\(R_{outer} , R_{inner}\)

Outer radius, inner radius (m)

P, S, Q

Number of poles, slots, phases

\(f_{rated} , n_{rated} ,\)\(T_{rated} , P_{rated}\), \(\omega_{m\_rated}\)

Rated: frequency, speed, torque, output power, radial speed (Hz, rpm, Nm, Watt, rad/s)

SRo, SRi, RRo, RRi

Stator outer, inner radius, rotor outer, inner radius (m)

Lstk, \(lg\), \(lm\), dc

Length of stack, airgap width, magnet thickness, stator and rotor back iron (m)

Ds, ts, \(\tau_{s}\), bs0, bs1, bs2

Slot depth, teeth width, slot pitch, slot opening, slot upper, lower width (m)

γ

Coil span (in slots)

\(N_{c} ,\)\(N_{s}\), ncpp, \(N_{tc}\), \(\hat{N}_{a}\)

Number of Coils, series coils, coils per phase, turns per coil, effective number of turns

\(V_{\varphi ,rated, } ,I_{\varphi }\), \(V_{no\_load }\)

Rated phase voltage, phase current, no-load phase voltage (V, A, V)

\(Z_{\phi } , R_{\phi } , XL_{\phi }\)

Phase impedance, resistance, reluctance (Ω)

\(Z_{\phi } , R_{\phi } , XL_{\phi }\)

Phase impedance, resistance, reluctance (Ω)

\(L_{\phi } ,Li_{g} , Li_{i1}\)

Inductance of phase, airgap, slot leakage (H)

\(kw\), PF, \(P_{a}\)

Winding factor, power factor, parallel paths

\(C_{csa}\),\(J_{s,copper }\), DW

Turn cross section area, copper ampacity (m2, A/m2), turn diameter (m)

\(\rho\), \(\rho_{cu}\), \(\rho_{stator}\), \(\rho_{rotor}\), \(\rho_{pm}\)

Density of copper, stator, rotor, PM (kg/m3)

References

  1. 1.
    Tatsuta F, Tsuji T, Emi N, Nishikata S (2006) Studies on a wind turbine generator system using a shaft generator system. J Electr Eng Technol 1(2):177–184CrossRefGoogle Scholar
  2. 2.
    Woo D, Kwak S, Seo J, Jung H (2010) Characteristic analysis for IPMSM considering flux-linkage ripple. J Electr Eng Technol 5(4):592–596CrossRefGoogle Scholar
  3. 3.
    Seo J, Jung H (2009) Optimal design of an IPMSM for high-speed operation using electromagnetic and stress analysis. J Electr Eng Technol 4(3):377–381CrossRefGoogle Scholar
  4. 4.
    You Y, Lin H, Kwon B (2012) Optimal design of a distributed winding type axial flux permanent magnet synchronous generator. J Electr Eng Technol 7(1):69–74CrossRefGoogle Scholar
  5. 5.
    Byeon G, Park IK, Jang G (2010) Modeling and control of a doubly-fed induction generator (DFIG) wind power generation system for real-time simulations. J Electr Eng Technol 5(1):61–69CrossRefGoogle Scholar
  6. 6.
    Hendershot JR, Miller T (1994) Design of brushless permanent-magnet motors, 1st edn. Clarendon Press, OxfordGoogle Scholar
  7. 7.
    Hanselman DC (2003) Brushless permanent magnet motor design, 2nd edn. The Writer’s Collective, Cranston, Rhode IslandGoogle Scholar
  8. 8.
    Jokinen T, Hrabovcova V (2008) Design of rotating electrical machines, 2nd edn. Wiley, New YorkGoogle Scholar
  9. 9.
    Kasinathan P, Grauers A, Hamdi ES (2005) Force density limits in low-speed permanent-magnet machines due to saturation. IEEE Trans Energy Convers 20(1):37–44CrossRefGoogle Scholar
  10. 10.
    Darrell DG (2007) “Design requirements for brushless permanent magnet generators for use in small renewable energy systems.” In: IECON proceedings (industrial electronics conference), pp 216–221Google Scholar
  11. 11.
    Li H, Chen Z (2007) “Optimal direct-drive permanent magnet wind generator systems for different rated wind speeds.” In: 2007 European conference on power electronics and applications, EPEGoogle Scholar
  12. 12.
    He Q, Wang Q (2012) “Optimal design of low-speed permanent magnet generator for wind turbine application.” In: Asia-Pacific power and energy engineering conference, APPEEC, vol 6012179, pp 0–2Google Scholar
  13. 13.
    Chen J, Nayar CV, Xu L (2000) Design and finite-element analysis of an outer-rotor permanent-magnet generator for directly coupled wind. IEEE Trans Magn 36(5):3802–3809CrossRefGoogle Scholar
  14. 14.
    Libert F, Soulard J (2006) “Manufacturing methods of stator cores with concentrated windings.” In: The 3rd IET international conference on power electronics, machines and drives, 2006. PEMD, pp 676–680Google Scholar
  15. 15.
    Pillay P, Visser KD, Khan MA, Zorlu S, Guan R (2007) “An integrated design approach for small grid-tied permanent magnet wind generators.” In: IEEE PES PowerAfrica 2007 conference and exposition, pp 16–20Google Scholar
  16. 16.
    Zhang X, Qu R (2013) “Pole number selection strategy of low-speed multiple-pole permanent magnet synchronous machines.” In: Proceedings of the 2013 IEEE international electric machines and drives conference, IEMDC 2013, pp 1267–1274Google Scholar
  17. 17.
    Hsiao C-Y, Yeh S-N, Hwang J-C (2014) Design of high performance permanent-magnet synchronous wind generators. Energies 7(11):7105–7124CrossRefGoogle Scholar
  18. 18.
    Kilk A (2007) Low-speed permanent-magnet synchronous generator for small-scale wind power applications. Oil Shale 24(2):318–331Google Scholar
  19. 19.
    Boughrara K, Ibtiouen R, Zarko D, Touhami O, Abderezzak R (2010) Magnetic field analysis of external rotor permanent-magnet synchronous motors using conformal mapping. IEEE Trans Magn 46(9):3684–3693CrossRefGoogle Scholar
  20. 20.
    Chan T, Lai LL (2007) “Permanent-magnet machines for distributed power generation : a review,” pp 6–11Google Scholar
  21. 21.
    Huang S, Luo J, Leonardi F, Lipo TA (1998) A general approach to sizing and power density equations for comparison of electrical machines. IEEE Trans Ind Appl 34(1):92–97CrossRefGoogle Scholar
  22. 22.
    Boazzo B, Pellegrino G, Vagati A (2014) Multipolar SPM machines for direct-drive application: a general design approach. IEEE Trans Ind Appl 50(1):327–337CrossRefGoogle Scholar
  23. 23.
    Ghoneim WAM, Hebala A, Ashour H (2016) “A comparative study of winding configuration effect on the performance of low speed PMSG using FEM.” In: 2016 Eighteenth international middle east power systems conference (MEPCON), pp 348–352Google Scholar
  24. 24.
    Hebala A, Ghoneim WAM, Ashour HA (2017) “Different design approaches of surface mounted high performance PMSG.” In: 2017 International conference on advanced control circuits systems (ACCS) systems and 2017 International conference on new paradigms in electronics and information technology (PEIT), pp 85–90Google Scholar
  25. 25.
    Hebala A, Hebala O, Ghoneim WAM, Ashour HA (2017) “Multi-objective particle swarm optimization of wind turbine directly connected PMSG.” In: Nineteenth international middle east power systems conference (MEPCON), 2017, pp 1075–1080Google Scholar
  26. 26.
    Zohoori A, Vahedi A, Noroozi MA (2014) “Design study of FSPM generator with novel outer rotor configuration for small wind turbine application.” In: 2014 14th International conference on environment and electrical engineering, EEEIC 2014—conference proceedings, pp 275–279Google Scholar
  27. 27.
    Eriksson S, Bernhoff H, Leijon M (2008) Evaluation of different turbine concepts for wind power. Renew Sustain Energy Rev 12:1419–1434CrossRefGoogle Scholar
  28. 28.
    Duan Y, Harley RG, Habetler TG (2009) “Method for multi-objective optimized designs of surface mount permanent magnet motors with concentrated or distributed stator windings.” In: 2009 IEEE Int. Electr. Mach. Drives Conf. IEMDC’09, pp 323–328Google Scholar
  29. 29.
    Jia S, Qu R, Li J, Fan X, Zhang M (2015) “Study of direct-drive permanent magnet synchronous generators with solid rotor back-iron and different windings.” In: 2014 17th Int. Conf. Electr. Mach. Syst. ICEMS 2014, pp 3240–3245Google Scholar
  30. 30.
    Fengxiang WFW, Jianlong BJB, Qingming HQH, Jian PJP (2005) “Design features of low speed permanent magnet generator direct driven by wind turbine.” In: 2005 Int. Conf. Electr. Mach. Syst., vol 2, pp 1017–1020Google Scholar
  31. 31.
    Bottesi O, Alberti L (2014) “Design of small-size generator for variable speed micro-hydroelectric power plants.” Proc. Int. Conf. Electr. Mach. ICEM 2014, pp 484–490Google Scholar
  32. 32.
    Jang S, Seo H, Park Y, Park H, Choi J (2012) Design and electromagnetic field characteristic analysis of 1.5 kW small scale wind power generator for substitution of Nd-Fe-B to ferrite permanent magnet. IEEE Trans Magn 48(11):2933–2936CrossRefGoogle Scholar
  33. 33.
    Qingdao L (2016) Jinfan energy science and technology co. Model Number: JFVC-1KW (100 rpm)Google Scholar

Copyright information

© The Korean Institute of Electrical Engineers 2019

Authors and Affiliations

  • Ahmed Hebala
    • 1
    Email author
  • Walid A. M. Ghoneim
    • 1
  • Hamdy A. Ashour
    • 1
  1. 1.Arab Academy for Science and Technology and Maritime TransportAlexandriaEgypt

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