This fellow has designed his own AC controller, with which he was able to control a Model S Inverter and Motor. The video is a walk-through of the Model S drive train and how to reverse engineer control of the system.
He claims his universal motor control board allows use of any inverter with any AC motor – for example a Prius controller could be used with the Model S motor he shows.
About David Herron
David Herron is a writer and software engineer living in Silicon Valley. He primarily writes about electric vehicles, clean energy systems, climate change, peak oil and related issues. When not writing he indulges in software projects and is sometimes employed as a software engineer. David has written for sites like PlugInCars and TorqueNews, and worked for companies like Sun Microsystems and Yahoo.