NewsAugust 2023

In-Wheel Motors for a Hydrogen Car

A key feature of the Rasa hydrogen fuel cell car developed by Riversimple is its four in-wheel electric motors, which were developed by PMW. These thin, powerful pancake motors had to meet a number of demanding requirements, including the need to have an integral mount for the brake disc.

Challenges

  • High Power
  • Ultra Flat

Results

  • Application Optimised XR Design
  • Integrated In-Wheel Motor

Further constraints were the use of conventional, externally mounted disc callipers, a low target weight and the need for the whole package to fit within a 15 inch wheel rim. The XR32-11 in-wheel motors produced by PMW allow the car to use regenerative braking, recapturing over 50% of the kinetic energy, and using a bank of supercapacitors in the front of the car to store the electrical power generated

The brushless DC motors help to keep the weight of the vehicle down, as they deliver unparalleled performance for their size, with each capable of producing a peak torque as high as 160 Nm while weighing only 17 kg

PMW worked closely with us on the design of the motor, which meets all the required torque, speed and thermal requirements. The quality of manufacture of the motors is also excellent, and they have performed faultlessly during testing

Martin Stevens, Electronic Systems Engineer

Contact our application team for assistance with your next challenging motor project ...

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