TM4 Sumo™ HD

Heavily efficient

The TM4 SUMO HD systems are designed to interface directly with standard axles (no gearbox required).

Its direct drive/gearless approach makes it the perfect match for any heavy-duty commercial vehicle platforms, bus platforms and off-highway applications.

Motor features

  • Proven permanent magnet technology for optimal efficiency
  • Outer rotor topology for maximum torque density
  • Low electro-magnetic audible noise
  • Low-cogging and ripple torque for better NVH
  • Four-quadrant operation
  • Thermal protection

Inverter features

  • 9-phase high-voltage inverter
  • Variable switching frequency
  • ReflexTM gate driver technology for high power and
  • current densities
  • EMI filter
  • Best-in-class power density
  • High efficiency

The direct-drive advantage

TM4 SUMO high torque motors can interface directly with standard rear differential without the need for an intermediate gearbox.

A direct drive system allows for the following benefits:

  • High reliability: removing the gearbox means removing the most mechanically complex and maintenance intensive part of the vehicle
  • Easy to fit between the H beam of the truck or in the engine bay of the city bus: no need to modify the vehicle architecture
  • Low maintenance: Dana TM4 direct-drive motors require no maintenance
  • Fast ROI


  • System protection:  IP67 / IP6K9K
  • Max coolant temperature: 65°C
  • Coolant type: 40/60 water-glycol
  • Toxic materials and flammability: ROHS, ELV, UL94-V0
  • External corrosion resistance: Salt mist, chemical products

Software features

  • Sinusoidal motor current
  • Temperature sensing for system derating and alarms
  • Advanced diagnostic capabilities (TM4 ODIN)
  • Communication fault detection
  • CAN 2.0b communication interface
  • Torque or speed control
  • DC voltage control available upon request
  • Advanced control algorithm for optimal system power and efficiency


motor: 340 kg
inverter:  38 kg

motor: 505 x 524 x 505 mm
inverter:  450 x 138 x 858 mm

Performance curves

Technical specifications

HV3500-9PHV3500-9P* NEWHV4000-9P NEW
Peak power (kW)370475250
Continuous power (kW)260260197
Operating speed (RPM)0-34000-34000-2450
Continuous torque (Nm)197019702090
Peak torque (Nm)344534154000
600 Vdc, 45°C / *650 Vdc, 45°C
Specifications are subject to change

Optimized for Commercial Vehicles