????????? ????? Axial Flux

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Vs. brush using
Stator windings
Rotor magnets
brushless
brush
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Vs. shape
Disk-shaped
Cylindrical
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Vs. current-field directions
Currents
Magnetic field
Torque
Rotation axles
Axial-Field
Radial-Field
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WE DEAL WITH AND OFFER

• Brushless

• Axial field

• Disk-shaped

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Brushless ?

• No brushes no maintenance
• No brushes long working life
• No brushes no sparking
• No brushes reduced EMI / RFI

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Disk-shaped ?
System with DISK-SHAPED
system with CYLINDRICAL
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Axial Flux ?
AXIAL FLUX
RADIAL FLUX
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Electromagnetic Structure
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General Design
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Stator
Coils
Carrying structure
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Rotor
Permanent magnets
Yoke
Carrying structure
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Modularity - Example of 3-Module Structure
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Features

• 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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Advantages

• 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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Applications

• 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

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Implementations

• Generators and APU

Tactical automatic charger (24V, 1kW, 8 kg)
MIL-standard EMI/RFI protected portable
dual-Input diesel generator (28 VDC, 1.5 kW, 55
kg)
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Implementations

• Liquid-cooled motors for heavy electric vehicle

Gear - box
Motor
AT - 25 for EV (25 kW, 10,500 rpm, OD260 mm)
AT - 25 gear-box 17.75 75 kW for EV
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Implementations

• Air-cooled motors for light electric vehicle

M300 (300 W 5,000 rpm 0.9 kg, OD127 mm)
M300 worm gear (260 W 100 rpm)
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Implementations

• Direct drive rotating stages

Turntable RT -200 (accuracy /- 1, runout 3um)
Ultra accurate rotating optical bench
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Implementations

• Motor-reducer assembly

Hub wheel-drive for robotics 3kg (50 Nm 50 rpm)
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Motor Technology Estimation (1999, per VW)
Coreless Axial Flux
Trans flux
TF- Motor
Eisenloser Axialfluxmotor
Efficiency
Wirkungsgrad
Switched Reluctance Motor
PM-Synchron motor
Status
Asynchronmotor
Serial production
serienmäßig verfügbar
Prototypes
Prototypen vorhanden
Design Phase
Specific power
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Leistungsgewicht kW/kg