EVSR’s Dyno Test #3 aimed to test the car in a more realistic manner. With more changes to the cooling and driveline systems, performance was expected to improve.
Having good discharge and power data, our 3rd Dyno run was targeted at more cooling studies and steady state loads to match horsepower to amps drawn. We also wanted to come to a conclusion as to what type of coupler we should use to connect the motor to the differential that will allow shock-free vibration dampening, while reliably transmitting the needed power.
The first session was 15 minutes of high load at a road speed of 100MPH while monitoring output, battery voltage and temperatures. Session 2 was another 15 minute session which focused on a wider range of speed and power while increasing the stresses and monitoring the temperatures which continue to improve but need some more adjustments to the cooling system. Our final session was just a few short minutes to monitor bottom end voltages and determine the total power available to us on a full charge.
We have learned our original drive coupler will have to be improved upon and we have chosen a popular flex joint used widely in production cars to attach the motor to the differential.