1. Liquid-cooled Heavy-duty Coreless Motors

2. Classification:
Brushless
Axial field
Disk-shaped

3. Principle Structure

4. Implemented 3-Module Structure

5. 3-Module Motor (25 kW peak x 3)
Pin-type
connectors
R-side
end rotor
interposed rotor
interposed rotor
stator module
L-side
end rotor
stator module
stator module

6. 1-Module Motor - general view
Right Shield
Left Shield
Optional mounting threaded holes
Fastening rods
Wire outlets
Main mounting threaded holes
Stator
Shaft
Right
Channel Ring
Left Channel Ring

7. 1-Module Motor - exploded view
Left Bearing Cover
Fastening nuts
Fastening rods
Left Rotor
Right Shield
Left Shield
Shaft
Right Channel Ring
Left Channel Ring
Wire outlets
Stator

8. 1-Module Motor - cut-away view
Input nipples
Outlet nipples
Stator
Outlet chamber
Inlet chamber
Place for coils
Right Rotor Disk
Left Rotor Disk
Left bearing
Right bearing
Shaft

9. Cooling System Liquid Coolant: DexCool ElectraCool:
Prediluted 50/50 Anti-Freeze/Coolant (ethylene glycol)
Boiling protection: 129°C (265°F)
Freezing protection: -37°C (-34°F)
Volumetric flow rate: 5 Gallon/min
Inlet fluid temperature:
Maximum: 80°C (176°F)
Minimum: -18°C (0°F) / -40°C (-40°F)
Maximal pressure drop: 1.0 lb/in²

10. 3-Module - Cooling System
Cooling liquid outlets
Cooling liquid inlet

11. 3-Module - Cooling System
First Stator
Last Stator
Outlet
Inlet

12. Prototypes Gear - box Motor 1-Module Motor (25 kW, 10,500 rpm,
OD=260 mm)
1-Module Motor + 75 kW gear-box on test bench