Design considerations for dual winding permanent magnet synchronous machines

Meşe, Erkan; Tezcan, Murat; Ayaz, Murat; Yaşa, Yusuf; Yilmaz, K.

doi:10.1109/ecce.2012.6342581

Cited by 12 publications

(7 citation statements)

References 9 publications

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“…Decoupling between winding sets for double-fed electrical machines can be ensured by single layer concentrated winding topology [31]. Thus, winding sets of the DFPMSG can be considered as two independent machines in terms of electrical equations.…”

Section: B Analytical Model Of the Machinementioning

confidence: 99%

PMSG-Based Dual-Port Wind-Energy Conversion System With Reduced Converter Size

et al. 2021

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In this study, a dual-port wind-energy conversion system has been proposed. A double-fed permanentmagnet synchronous generator (DFPMSG) forms the central part of the system, where the concentrated single-layer winding configuration of the generator enables electric and magnetic isolation between the ports. DFPMSG has two three-phase terminals out of the stator; one is connected directly to the grid, whereas the other is tied to the grid through a back-to-back converter. This study investigates design issues caused by the DFPMSG port with a direct grid connection. The unique design issues of the proposed system include determining the slot/pole combination using wind data and determining the minimum reactive power requirement for the port with a direct grid connection. Next, the load-sharing capability among the ports of the proposed system is presented through a detailed investigation of three schemes. Experimental work is presented for a 5-kW prototype DFPMSG system to illustrate the isolation among the ports, minimized reactive power demand on the port with direct grid connection, and load-sharing ability among the ports for different control schemes.INDEX TERMS Double-fed machines, electric machine design, multi-port systems, permanent magnet synchronous generators, wind energy.

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Section: B Analytical Model Of the Machinementioning

confidence: 99%

PMSG-Based Dual-Port Wind-Energy Conversion System With Reduced Converter Size

et al. 2021

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“…In addition, each of the two rotor windings needed should couple with only the stator winding for which it is intended. There are different winding strategies applied to dual wound machines [14], [15]. In addition, the harmonic analysis of the windings has been studied in [16]- [18].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the harmonic analysis of the windings has been studied in [16]- [18]. Dual wound machines are shown to have great potential to provide better power quality [15], better torque quality [19] and reduce the losses [20].…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of dual wound machine for electric ships

Yin

Pei

Zeng

et al. 2020

2020 International Conference on Electrical Machines (ICEM)

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Integrated full electric propulsion (IFEP) systems eliminate the direct mechanical coupling between the prime mover and the propeller, enabling easier connection of multiple prime movers and allowing more equitable and fuel-efficient engine loading. These features are important in both cruise ship and naval warship design. Propulsion and ship service systems require different electrical ratings. The general solution is to use multiple electrical machine sets. To approach the most compact design and maximise the weight reduction, a dual wound machine is considered in this paper. It has dual two-layer windings which share the same slots and uses one prime mover, to produce two independent power supplies. This paper designs a dual wound machine with no electromagnetic coupling due to the airgap fields, by algebraically analyzing the harmonic distribution. Further verification of the nil electro-magnetic coupling due to both the airgap and slot leakage fluxes is provided by 2D finite element modeling. Both loaded and unloaded conditions are considered.

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“…The primary purpose of a dual-wound machine is to supply multiple subsystems from a single compact generator (Hodge, 2015). Several different winding strategies and applications can be applied to dual wound machines (Hodge, 2015), (Mese, 2012). This can even include using two sets of windings with different frequencies to supply a high-powered propulsion load as well as a lower powered service load (Hodge, 2015), but should also allow for redundant systems where one generator can be used to supply power for both port and starboard busses (Doerry, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…In some instantiations, this can allow for some simplification of power electronics and enables a connected battery to charge or discharge to one set of windings while the other set of windings is always used to provide power to electrical devices on the system (Mese, 2013). Dual wound machines can also provide better power quality by tighter regulation of stator MMF (Mese, 2012). In all the above cases, the machine windings are made to minimize flux linkages between the phases of different winding sets and their construction can be very different from traditional machines.…”

Section: Introductionmentioning

confidence: 99%

Deriving Specifications for Coupling through Dual-Wound Generators

Rashkin

Neely

Wilson

et al. 2018

Proceedings of the International Ship Control Systems Symposium (iSCSS)

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Many candidate power system architectures are being evaluated for the Navy’s next generation all-electric warship. One proposed power system concept involves the use of dual-wound generators to power both the Port and Starboard side buses using different 3-phase sets from the same machine (Doerry, 2015). This offers the benefit of improved efficiency through reduced engine light-loading and improved dispatch flexibility, but the approach couples the two busses through a common generator, making one bus vulnerable to faults and other dynamic events on the other bus. Thus, understanding the dynamics of cross-bus coupling is imperative to the successful implementation of a dual-wound generator system. In (Rashkin, 2017), a kilowatt-scale system was analysed that considered the use of a dual-wound permanent magnet machine, two passive rectifiers, and two DC buses with resistive loads. For this system, dc voltage variation on one bus was evaluated in the time domain as a function of load changes on the other bus. Therein, substantive cross-bus coupling was demonstrated in simulation and hardware experiments. The voltage disturbances were attributed to electromechanical (i.e. speed disturbances) as well as electromagnetic coupling mechanisms. In this work, a 25 MVA dual-wound generator was considered, and active rectifier models were implemented in Matlab both using average value modelling and switching (space vector modulation) simulation models. The frequency dynamics of the system between the load on one side and the dc voltage on the other side was studied. The coupling is depicted in the frequency domain as a transfer function with amplitude and phase and is shown to have distinct characteristics (i.e. frequency regimes) associated with physical coupling mechanisms such as electromechanical and electromagnetic coupling as well as response characteristics associated with control action by the active rectifiers. In addition, based on requirements outlined in draft Military Standard 1399-MVDC, an approach to derive specifications will be discussed and presented. This method will aid in quantifying the allowable coupling of energy from one bus to another in various frequency regimes as a function of other power system parameters. Finally, design and control strategies will be discussed to mitigate cross-bus coupling. The findings of this work will inform the design, control, and operation of future naval warship power systems.

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Design considerations for dual winding permanent magnet synchronous machines

Cited by 12 publications

References 9 publications

PMSG-Based Dual-Port Wind-Energy Conversion System With Reduced Converter Size

PMSG-Based Dual-Port Wind-Energy Conversion System With Reduced Converter Size

Design and analysis of dual wound machine for electric ships

Deriving Specifications for Coupling through Dual-Wound Generators

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