120000 rpm motor

Ultra High Speed Motor

Working in collaboration with the Gas Turbine designers, Equipmake has developed a high speed motor generator for an electric vehicle range extender application.


The motor has a surface samarium cobalt permanent magnet rotor with a titanium retention sleeve. Equipmake has developed a power electronic inverter to allow the motor to interface to a 350V lithium ion battery pack and interface to the vehicle control system.


The motor runs on greased ceramic ball bearings and has integral air cooling of the stator and rotor.


Motor Specification

Motor Mass Including Housing3.9Kg
Continuous Power17kW
Maximum Speed120,000 rpm
Coolant Temperature40 Deg C (Air)
DC Bus Voltage350 V



120000rpm rotor resized

120,000 rpm Rotor

Electrical Stator resized

Electrical Stator

Pair of 120000 rpm 17kW MGU's on rig test resized

Pair of 120,000 rpm 17kW MGU's on rig test