Serial Hybrid: Power Shift Transmissions – Dual Electric Motor with Energy Storage & Generator Power

This serial hybrid system for power shift transmissions uses electric motors and can both generate power and store energy. Transmission operation is managed by a state-of-the-art microprocessor.


High Voltage

Data / Command Signals

System Overview

  • Serial hybrid using energy storage and generator
  • Vehicle drive train uses power from diesel and electric sources; auxiliaries are diesel-driven
  • Power regeneration through braking (vehicle)

Transmission and Controller

  • Mechanical interface to direct mount e-motor/generator to pump drive pads
  • State-of-the-art microprocessor control manages transmission operation

Hybrid Controller

  • Manages power distribution, interfacing with power shift transmission controller and high voltage equipment


  • Selection based on application characteristics (torque, installation)

Inverter, High Voltage Equipment

  • Controlled and monitored by hybrid controller

Energy Storage & BMS

  • Selection based on application characteristics


  • Not supplied by Twin Disc

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