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Given that there are separate left and right motors, I think it would be difficult to build a sufficiently capable control system, unless you have substantial ability to add programmed functionality to the motor controllers. For example, Curtis Instruments has controllers which are designed to be able to communicate and to coordinate control of two motors, so one takes the analog accelerator pedal input and serves as the control master, while the other controller gets its commands from the master and acts as a slave; each controller powers a motor. The intelligence needs to be somewhere, and if that's not the motor controllers I think you need a VMU.
Hi Brian, The Sevcon inverters are currently programmed to work in the same way, ie one is the master and the other is the slave. The master would have been receiving CAN messages from the VCU that it would decode and share with the slave inverter. Problem now is that I do not have the VCU so I will have to take the output from the throttle pedal, convert it to CAN messages that the Master inverter would understand. I would think you would have to do the same for any leaf inverter for example, so its possible, question is if i can do it with my limited knowledge. I have heard its possible to do this with Ardunio, and there is a lot of info on Ardunio on the net...