openinverter forum

Hi has anyone fitted twin Tesla small drive units one in the front and one at the back

datsrus wrote: ↑Fri Jan 01, 2021 9:35 pm Hi has anyone fitted twin Tesla small drive units one in the front and one at the back

You mean apart from Tesla?

Yes, I know of an AC Cobra replica build in the USA with twin motors. The problem is finding a battery that can supply the required power and that can be fitted into the space and weight capacity of the vehicle.

You will almost certainly have to build your own high discharge battery. Voltron over on endless sphere has a very long thread showing his process for making packs from 30/60c pouches. Small packs with crazy high amps. He built one for a LDU hill climb car last year. Super small for what it is.

Bob

Yes. I'm running SDU front and rear with a long range Model 3 pack. I have my own control board that processes throttle and brake inputs and coordinates motion between the two. Currently testing traction control and adaptive AWD. It uses front motor during low acceleration and 50/50 split during high acceleration. I also have "drift" mode that uses rear motor mostly and checks if the angle between vehicle heading and direction of travel is getting too large, in which case it bumps the front motor (either forward or reverse) to get me back in line.

It also handles contactors by comparing the logic output between the two openinverter boards and only turning on main contactors when both are ready (with a timeout). Most of it is analog because I wanted to use it with the default firmware. The board would be much simpler when I switch over to full CAN control, but it works for now and I would rather work on control algorithms at the moment.