Category:
Dyno Design
In most Braked dynamometers, the brake is installed over bearings and only the load cell prevents it to turn. Then the brake torque is converted to a linear force in the load cell as a result of the TQ / Lever (meters) formula. Note that torque can run in both directions, but normally we would use the load cell in compression mode,
Then, for instance, for a 1700 Nm brake and a 300 mm lever (distance from brake AXLE to load cell), the max force received in the cell will be:
1700 (Nm) / 0.300 (m) = 5666.n (N) –> (divided by 9.8 or 10) –> 578 Kg
In some cases a 500 kg load cell could be ok for this case, but if you expect to test high power cars then the rated 500 kg may be overpassed often and then it will better to choose a 1000 kg load cell.