Furze Platt Greenpower Racing

The motor is not the most efficient and powerful so you need to make the most of it.

Download the pdf files from the Greenpower web site especially the one that explains how to read the graphs.  

The motor will need cooling. Air cooling is simple but you need a lot of air to get rid of the heat and this air is not going to be aerodynamic. Electric fans are being used by some teams but they use battery power. TT and SS use a total loss water cooling system which is simple, but does require refills at pit stops which take time, and there is a penalty of extra weight.

The motor needs to be kept at around 1700 -1750 RPM to get a reasonable power out of it and it not to get too hot.

Gears are how to keep it there but they do add to the complexity of the car. You will need some form of indicator to tell the driver when to change down gear when the current exceeds say 30 amps.

TT and SS use a simple LED that comes on when this happens and the driver simply goes down one gear. If the light stays on, he changes down again until it stays off. The driver then decides to go up a gear when the car speed appears to go up, this may make the light come on for a short period (3 seconds), if it stays on the driver goes down one gear again. If it goes out and the speed keeps increasing change up again. This process is simple to follow and keeps the battery consumption and motor heat down.

We will post the current sense circuit on the website shortly.

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Last modified: 08/06/09