riff_raff wrote:The electric motor would run at variable speed and variable load. The electric motor's input speed, and even direction of rotation, would determine the output speed of the combining gearset. It would be a form of CVT.
Heck, you wouldn't even need a clutch. If the electric motor input to the differential gearset was the same speed as the turboshaft input, but in the opposite direction, then the differential gearset output speed would be zero.
Is my idea stupid?
Formula None wrote:Sort of like a Prius transmission with a turboshaft in place of the ICE? Fixed gear ratio?
The two MGU's (sun and ring gears) vary their speed and direction of rotation relative to the engine's speed (planet gear carrier).
Simulator here (bottom of page): http://eahart.com/prius/psd/
The arrangement certainly works... Below is quick mock-up of the required arrangement if you want to use a generator and an electric motor to decrease the speed of the output:-riff_raff wrote:The main idea behind my suggestion was a hybrid system that allows the turboshaft engine to run at constant speed but variable load.
The parallel system would only need the turbine engine to be sized for 100% power. That would be the best compromise for weight, since the turbine engine gives the best power-to-weight.
riff_raff wrote:the serial hybrid would require a turbine engine, electric motor and generator all sized for close to 100% of power requirements. The parallel system would only need the turbine engine to be sized for 100% power. That would be the best compromise for weight, since the turbine engine gives the best power-to-weight.
ringo wrote:One thing though, as the planet carrier goes to zero, or the wheel speed, while the turbine is at rated speed.
Most of the power will be going to the generator ring gear.
Will the generator power the already slowing motor on the drive shaft or charge some batteries.
It looks like a conflicting concept if batteries aren't involved.
correct me if i am interpreting it wrongly.
Users browsing this forum: bucker and 5 guests