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