Clarian Labs, a Seattle-based tech startup that has been working on power source for the Department of Defense Humanoid Robot Program, has just pulled-out of stealth mode its rotary generator (read the patent here). A battery-sized hybrid generator solution, Clarian’s invention basically creates an electric power source that can be rapidly refueled by swapping out a fuel source pack (a host of fuels can be used in this regard including bio-fuels and hydrogen).

These fuels then in-turn power the rotary-piston motor, exactly as you’d find in any sort of Wankel-powered vehicle, except for one small detail: there’s no output shaft. Instead of mechanically driving the wheels of the vehicle, the unit uses rotational induction from the rotary-piston to create an electrical current, which would then power the electric motor of your choosing. In reality, the system isn’t that different from what is found on modern diesel locomotives (modern trains use a diesel motor as a generator which in-turn powers electric motors), except obviously more compact.