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1
Axial Flux Coreless TechnologyT
ech
nol
ogy
Des
crip
tion
Axial Flux Coreless Technology
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Axial Flux Coreless TechnologyT
ech
nol
ogy
Des
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tion
Background:Electric MachinesElectric Machines
ClassificationClassification
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Axial Flux Coreless TechnologyT
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tion
Vs. brush usingVs. brush using Vs. brush usingVs. brush using
brushbrushbrushlessbrushless
Stator windings
Rotor magnets
driver
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Axial Flux Coreless TechnologyT
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Des
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Vs. shapeVs. shape Vs. shapeVs. shape
CylindricalCylindricalDisk-shapedDisk-shaped
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Axial Flux Coreless TechnologyT
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Rotation axlesRotation axles
Vs. current-field directionsVs. current-field directions Vs. current-field directionsVs. current-field directions
CurrentsCurrents
Magnetic fieldMagnetic field
TorqueTorque
Radial-FieldRadial-FieldAxial-FieldAxial-Field
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Axial Flux Coreless TechnologyT
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Des
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WE DEAL WITH AND OFFER: WE DEAL WITH AND OFFER: Brushless Brushless
Disk-shaped Disk-shaped
Axial field Axial field
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Axial Flux Coreless TechnologyT
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Des
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tion Why do we offer…
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Axial Flux Coreless TechnologyT
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Des
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… Brushless ? No brushes – no maintenance
No brushes – long working life
No brushes – no sparking
No brushes – reduced EMI / RFI
No brushes – no maintenance
No brushes – long working life
No brushes – no sparking
No brushes – reduced EMI / RFI
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Axial Flux Coreless TechnologyT
ech
nol
ogy
Des
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tion
Driven(Driving)System
Driven(Driving)System
ElectricMachine
Ele
ctr
ic M
ac
hin
e
Same Volumes
Volume1 Volume2 = 1.63 Volume 1
… Disk-shaped ?
system with CYLINDRICALSystem with DISK-SHAPED
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Axial Flux Coreless TechnologyT
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Des
crip
tion 178 % Power
M agnetic C ircu it
Coils
Permanent M agnets
M agnetic F lux
Currents
100 % Power
AXIAL FLUXRADIAL FLUX
… Axial Flux ?
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Axial Flux Coreless TechnologyT
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Detailing TheAxial Flux Coreless Technology
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Axial Flux Coreless TechnologyT
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Des
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Electromagnetic StructureElectromagnetic Structure
coils
m agnets
Yoke
structure
m agnetic flux
currents
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Axial Flux Coreless TechnologyT
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General DesignGeneral Design
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Axial Flux Coreless TechnologyT
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Coils
Carrying structure
StatorStator
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Axial Flux Coreless TechnologyT
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Yoke Permanent magnets
Carrying structure
RotorRotor
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Axial Flux Coreless TechnologyT
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Additional Featuresof Axial-Flux Machines
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Axial Flux Coreless TechnologyT
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Permanent MagnetNd FeB or Ferrite
Winding
Yoke
Modularity - Modularity - Example of 3-Module StructureExample of 3-Module Structure
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Axial Flux Coreless TechnologyT
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Des
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Principle Features and Advantages
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Axial Flux Coreless TechnologyT
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FeaturesFeatures
Axial direction of magnetic flux and radial direction of electric currents
Light-weight disk-shaped stator Absolutely no cogging No parasitic forces between rotor and stators Self-ventilation or forced cooling Very low inductance
Axial direction of magnetic flux and radial direction of electric currents
Light-weight disk-shaped stator Absolutely no cogging No parasitic forces between rotor and stators Self-ventilation or forced cooling Very low inductance
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Axial Flux Coreless TechnologyT
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AdvantagesAdvantages
No eddy-current losses Excellent power/weight, power/volume ratios Extremely high efficiency at high speeds Absolutely smooth rotation Excellent controllability Very low voltage drop under load in generators
No eddy-current losses Excellent power/weight, power/volume ratios Extremely high efficiency at high speeds Absolutely smooth rotation Excellent controllability Very low voltage drop under load in generators
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Axial Flux Coreless TechnologyT
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Des
crip
tion High- and medium speed alternators
Direct drive for ultra-accurate position stages and rotary tables
Drives for high speed motors with or without transmissions
Spindles and flywheels
High- and medium speed alternators Direct drive for ultra-accurate position stages and
rotary tables Drives for high speed motors with or without
transmissions Spindles and flywheels
ApplicationsApplications
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Axial Flux Coreless TechnologyT
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ImplementationsImplementations
Tactical automatic charger
(24V, 1kW, 8 kg)
MIL-standard EMI/RFI protected portable dual-Input diesel generator
(28 VDC, 1.5 kW, 55 kg)
Generator
Gasoline engine Controller
Dual-input Converter
Generator
Diesel engine
Charge controller
Generators and APU Generators and APU
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Axial Flux Coreless TechnologyT
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ogy
Des
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tion
ImplementationsImplementations
AT - 25 for EV
(25 kW, 10,500 rpm,
OD=260 mm) AT - 25 + gear-box 1:7.75 75 kW for EV
Motor Gear - box
Liquid-cooled motors for heavy electric vehicle Liquid-cooled motors for heavy electric vehicle
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Axial Flux Coreless TechnologyT
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M300
(300 W 5,000 rpm
0.9 kg, OD=127 mm)
M300 + worm gear (260 W 100 rpm)
ImplementationsImplementations Air-cooled motors for light electric vehicle Air-cooled motors for light electric vehicle
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Axial Flux Coreless TechnologyT
ech
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ogy
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Turntable RT -200
(accuracy +/- 1”, runout 3um)
ImplementationsImplementations
Ultra accurate rotating optical bench
Direct drive rotating stages Direct drive rotating stages
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Axial Flux Coreless TechnologyT
ech
nol
ogy
Des
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Hub wheel-drive for robotics 3kg (50 Nm 50 rpm)
ImplementationsImplementations Motor-reducer assembly Motor-reducer assembly
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Axial Flux Coreless TechnologyT
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Motor Technology Estimation (Motor Technology Estimation (1999, per VW1999, per VW))
Coreless Axial Flux
Switched Reluctance
Motor
Wir
kun
gsg
rad
Asynchronmotor
TF-Motor
PM-Synchron motor
Leistungsgewicht [kW/kg]
Design Phase
serienmäßig verfügbar
Prototypen vorhanden
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EisenloserAxialfluxmotor
Trans flux
StatusSerial production
Prototypes
Eff
icie
ncy
Specific power
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