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Energies 2017,10, 616
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ш0.85 0.8ν0.85 0.7ν0.8 0.5ν0.7 <0.5
Average efficiency Proposed drive system
Contrast drive system
Figure13.Averageefficiencydistributionof fourdrivingcycles.
It is evident that theproportionofhigh-efficiencyworkingpointsof theproposeddrivesystemis
larger thanthatof thecontrastingsystem, thus thepowerconsumption isonaverage6.75%lower than
thatof thecontrastingsystem.
5.Conclusions
Thispaper, aimedatanelectricvehicle equippedwithanOW-PMSMdrive systemwithdual
power sourcesanddual inverters; basedonanalyzing theexternal characteristicsof eachwinding
mode,weproducedawindingmodeswitchingstrategywhosetorquesaturationjudgmentalalgorithm,
insensitive to a motor’s parameters, could automatically realize upswitching of winding mode.
Theproposedmulti-level currenthysteresismodulationalgorithmcanset themajorpowersourceand
switch itatanytime in independentmode,accomplishingenergydistributionbetweentwopower
sources; its twocontrolmethods, the lowswitchingfrequencymethodandthehighpowerdifference
method,couldachievedifferentenergydistributioneffects. Fromthesimulationresults, compared
withanOW-PMSMdrivesystemwith traditional two-levelcurrenthysteresismodulation,under the
sameconditions theproposedsystemhas30%lower torquerippleanda lowerswitchingfrequencyof
inverterdevices. Thus theproposedsystemhas3%higherpeakefficiencyanda largerhigh-efficiency
area thanatraditionalOW-PMSMsystem.Byapplying it toelectricvehicles, thepowerconsumption
is6.75%loweronaverageunder theproposedcontrolmethods.Moreover, throughits twodifferent
controlmethods in independentmode, energydistributionbetween the twopowersources canbe
realized, thus theDC/DCconverterbetweenthemcanbecancelled.
Finally, the proposed winding mode switching strategy and multi-level current hysteresis
modulationmethod take full advantage of eachwindingmode’sworking range, reduce inverter
switching loss, increasesystemefficiency,andrealizeenergydistributionbetweentwopowersources.
Itprovidesa theoreticalbasisandimplementationschemeafordual-powerOW-PMSMdrivesystem
inelectricvehicles. Futureresearchwillbedirectedtowardsfindinganenergydistributionmethod
matchedwith this systemforelectricvehicles tomaximize theoverall efficiencyanddrivingrange.
Aftersolvingtheexistingpractical issues,anexperimentalverificationof theproposedsystemwill
alsobeconducted inanelectricvehicle.
Acknowledgments: Thisworkwas supportedby theChinaPostdoctoral ScienceFoundation (2014M561290),
theEnergyAdministrationof JilinProvince [2016]35,andthe JilinProvinceScienceandTechnologyDevelopment
Fund(20150520115JH).
AuthorContributions:NanXuandLiangChuconceivedthecontrolmethodandrevised the fullmanuscript;
Yi-fan JiaandDong-shengChenperformedthesimulationandwrote the fullmanuscript;Yan-weiWangand
XinTanganalyzedthedata;ZheXuanalyzedandevaluatedthesimulationresultsandgavevaluablesuggestions.
Conflictsof Interest:Theauthorsdeclarenoconflictof interest.
261
Emerging Technologies for Electric and Hybrid Vehicles
- Title
- Emerging Technologies for Electric and Hybrid Vehicles
- Editor
- MDPI
- Location
- Basel
- Date
- 2017
- Language
- English
- License
- CC BY-NC-ND 4.0
- ISBN
- 978-3-03897-191-7
- Size
- 17.0 x 24.4 cm
- Pages
- 376
- Keywords
- electric vehicle, plug-in hybrid electric vehicle (PHEV), energy sources, energy management strategy, energy-storage system, charging technologies, control algorithms, battery, operating scenario, wireless power transfer (WPT)
- Category
- Technik