My name is Joshan Mangroo and I am the motor engineer of the Eco-Runner Team Delft. I do this part time next to following the minor
The Eco-Runner Team Delft is a student team of the Delft university of technology. Every year we try to build a vehicle that is as fuel efficient as possible. Next to that, our vehicle is powered by hydrogen. We are very close to our goal of a fuel efficiency of 4000 km/L petrol equivalent. During design and testing we need the proper equipment to do so. One of the ways we validate our designs is our dynamometer.
The dynamometer has various utilities. One of which is that we can test any track that we want at any moment. This is a great optimizing tool to use, as we normally can only test each component individually, it is now possible to test the whole system at once, and that is the most important test. In that way we know for sure what the limits of the powertrain are, as well as further convolute the best strategy during the race. High stress tests for emergency stops can be simulated, or the efficiency of the regenerative braking. The data is live represented and logged for later analysis. That can later be used for perfect tuning of the motor controller for example, and various subsystems.
The Eco-Runner has such a high fuel efficiency that we cannot use regular dynamometers. So we made our own, with as key component the RWT 410/420 Series torque transducers from Althen. This allows us to test our complete powertrain with high reliability and accuracy. With the transducer we can send the data to the computer for a better representation of the data and for storage. Althen’s support provided us with the necessary stand-alone support software for their transducers in LabVIEW. This allowed us to make a custom and modular testing system with easy implementations of the sensor.
The dynamometer will be used to simulate stress points that may occur during the race and evaluate if everything is up to spec. Another more important function that we will add will be to simulate the whole track for the whole powertrain. This is key to not only optimize the powertrain as a whole, but also refine our strategy simulations a lot. For that, we are trying to expand the capabilities of the dyno via software, like adding a regenerative braking simulation.
When our race track is known, we can simulate it, and validate our models extensively. We can even run tests on hydrogen, to see whether our predicted efficiency meets up with the real data. And all that in our own workshop, where it is dry and clean, and where we can safely measure everything we want to know about the car as a whole and the powertrain in particular.
In summary, the dynamometer is crucial in the design and testing phase for our powertrain and strategy department. We would like to thank Althen for their sponsoring of the RWT 410/420 torque transducer.