DSD and Oxford YASA Motors Unveil Innovative EV Drivetrain Concept

MSYS Multi-Speed Traction System
Introducing MSYS – an integrated 3 speed powertrain set to revolutionise the future EV market. The system supplies 60 kW of continuous power alongside over 2000 Nm of torque at the wheels in an extremely compact package.
Developed by Drive System Design and Oxford YASA Motors, MSYS offers a powerful and efficient powertrain solution to the future electric vehicle market. Integrated design of an axial flux YASA® motor and multi-speed transmission provide opportunities to simplify the motor cooling system, electrical architecture and control system.
Low Weight
- 45 kg entire powertrain by virtue of the innovative YASA® motor and DSD 3 speed compact transmission integration
Low Cost
- Minimal use of expensive rare earth materials in motor
- Simple transmission design
- Innovative shift system – low component count
- Single integrated cooling system
- Reduced power electronics requirements through low motor inductance and multi-speed gearing system
Small Package
- Approximately 300 mm X 300 mm X 400 mm
- Provides opportunities in the tightest of vehicle constraints

Performance
- High axle torque available at low motor speed >2000Nm
- DSD Overlap Shift Technology provides rapid ratio change
- High torque throughout speed range
- Class leading efficiency
- Total powertrain efficiency (>91%)
- High efficiency power electronics
- Innovative cooling and lubrication system reduces cold start losses.
Specification:
|
Motor Type |
Axial Flux YASA® motor |
|
Motor Power |
60kW continuous (85kW+ for 60s peak) |
|
Transmission Max Torque |
200Nm @ 4000rpm (130Nm @ 6000rpm) |
|
Transmission Ratios (3 speed) |
1st - 10.01:1 2nd - 7.15:1 3rd - 5.42:1 |
|
Gear Shift |
Electrically Actuated Overlap Shift Technology |
|
Driveline Efficiency |
98% (transmission), 95% (e-machine), 98% (PE) 91% overall efficiency |
|
Lubrication System |
Pressurised Lubrication |
|
Park Lock |
Integrated Plunger Type with Electrical Actuation Mechanical Safety Release |
|
Powertrain Weight |
45kg (wet and including e-machine) |
|
Installation Length |
302mm |
|
Cooling System |
Integrated System |
|
Options |
Output disconnect for e-AWD application |
System Dimensions:

Anyone with interest in this product can contact Drive System Design directly on 01926 678310 or info@drivesystemdesign.com
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