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Axial Flux Technology for Motors & Generators

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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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Presentation Transcript
slide2

Background:

Motors & Generators

Classification

slide3

driver

Vs. brush using

Stator windings

Rotor magnets

brushless

brush

slide4

Vs. shape

Disk-shaped

Cylindrical

slide5

Vs. current-field directions

Currents

Magnetic field

Torque

Rotation axles

Axial-Field

Radial-Field

slide6
Brushless

WE DEAL WITH AND OFFER:

  • Axial field
  • Disk-shaped
slide8

… Brushless ?

  • No brushes – no maintenance
  • No brushes – long working life
  • No brushes – no sparking
  • No brushes – reduced EMI / RFI
slide9

… Disk-shaped ?

System with DISK-SHAPED

system with CYLINDRICAL

slide10

… Axial Flux ?

RADIAL FLUX

AXIAL FLUX

slide11

Detailing The

Axial Flux Technology

slide12

Version I

With Steel Core

slide14

Right stator

rotor

Lefthousing

Right housing

Left housing

General Design

slide15

Core

Active coil part

Internal overhang

External overhang

Stator

slide16

Permanent magnets

Shaft

Carrying structure

Rotor

slide17

Version II

Coreless

slide20

Stator

Coils

Carrying structure

slide21

Rotor

Permanent magnets

Yoke

Carrying structure

slide22

Additional Features

of Axial-Flux Machines

slide24

Modularity

Interposed

Rotors

End Rotors

slide26

Version I

With Steel Core

slide27
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

slide28
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

slide29
Drives for robotic (with and without transmission)
  • Drives for high inertia loads
  • Direct drive rotation tables
  • Torquers

Applications

slide30

Implementations

  • Servo-motors for robotics

BDM 002 (4.4 Nm stall 4.4 kg)

BDM 006 (14.4 Nm stall 10.0 kg)

slide31

Version II

Coreless

slide32
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

slide33
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

slide34
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

slide35

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)

slide36

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

slide37

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)

slide38

Implementations

  • Direct drive rotating stages

Turntable RT -200

(accuracy +/- 1”, runout 3um)

Ultra accurate rotating optical bench

slide39

Implementations

  • Motor-reducer assembly

Hub wheel-drive for robotics 3kg (50 Nm 50 rpm)

slide40

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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