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Axial Flux Technology for Motors & Generators

Axial Flux Technology for Motors & Generators. Background: Motors & Generators Classification. driver. Vs. brush using. Stator windings. Rotor magnets. brushless. brush. Vs. shape. Disk-shaped. Cylindrical. Vs. current-field directions. Currents. Magnetic field.

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Axial Flux Technology for Motors & Generators

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  1. Axial Flux Technology for Motors & Generators

  2. Background: Motors & Generators Classification

  3. driver Vs. brush using Stator windings Rotor magnets brushless brush

  4. Vs. shape Disk-shaped Cylindrical

  5. Vs. current-field directions Currents Magnetic field Torque Rotation axles Axial-Field Radial-Field

  6. Brushless WE DEAL WITH AND OFFER: • Axial field • Disk-shaped

  7. Why do we offer …

  8. … Brushless ? • No brushes – no maintenance • No brushes – long working life • No brushes – no sparking • No brushes – reduced EMI / RFI

  9. … Disk-shaped ? System with DISK-SHAPED system with CYLINDRICAL

  10. … Axial Flux ? RADIAL FLUX AXIAL FLUX

  11. Detailing The Axial Flux Technology

  12. Version I With Steel Core

  13. Electromagnetic Structure

  14. Right stator rotor Lefthousing Right housing Left housing General Design

  15. Core Active coil part Internal overhang External overhang Stator

  16. Permanent magnets Shaft Carrying structure Rotor

  17. Version II Coreless

  18. Electromagnetic Structure

  19. General Design

  20. Stator Coils Carrying structure

  21. Rotor Permanent magnets Yoke Carrying structure

  22. Additional Features of Axial-Flux Machines

  23. Various Stators-Rotors Combinations

  24. Modularity Interposed Rotors End Rotors

  25. Principle Features and Advantages

  26. Version I With Steel Core

  27. Axial direction of magnetic flux and radial direction of electric currents • Thin disk-shaped rotor • Flat Nd-Fe-B magnets • Reeled electric steel core • Thermo conducting cooling mechanism • Reduced cogging Features

  28. Excellent torque-to-volume, torque/weight ratios (up to 2÷3 Nm/kg) • High stall torque • Highest acceleration • Low mechanical time constant • Wide operating speed range • Allowance for peak torques without forced cooling Advantages

  29. Drives for robotic (with and without transmission) • Drives for high inertia loads • Direct drive rotation tables • Torquers Applications

  30. Implementations • Servo-motors for robotics BDM 002 (4.4 Nm stall 4.4 kg) BDM 006 (14.4 Nm stall 10.0 kg)

  31. Version II Coreless

  32. 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 Features

  33. 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 Advantages

  34. 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 Applications

  35. Diesel engine Controller Gasoline engine Generator Generator Dual-input Converter Charge controller 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)

  36. Implementations • Liquid-cooled motors for heavy electric vehicle Gear - box Motor AT - 25 for EV (25 kW, 10,500 rpm, OD=260 mm) AT - 25 + gear-box 1:7.75 75 kW for EV

  37. Implementations • Air-cooled motors for light electric vehicle M300 (300 W 5,000 rpm 0.9 kg, OD=127 mm) M300 + worm gear (260 W 100 rpm)

  38. Implementations • Direct drive rotating stages Turntable RT -200 (accuracy +/- 1”, runout 3um) Ultra accurate rotating optical bench

  39. Implementations • Motor-reducer assembly Hub wheel-drive for robotics 3kg (50 Nm 50 rpm)

  40. Motor Technology Estimation (1999, per VW) Trans flux Coreless Axial 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 1 2 Leistungsgewicht [kW/kg]

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