An hour long, still interesting insights about how to design efficiently: This is the awesome motor: Charged EVs | EV-builder DeltaWing to use DHX motors with direct-winding heat exchange system In effect, a liquid cooled, motor that allows much higher currents and power density. In a Prius, these motors could shave almost 100 lbs but there is an even more effective approach. Encapsulate the stators in a non-conductive bath inside a jacket. This would provide direct, heat conduction and increase the power density even further. With a pressurized coolant bath, it could leave the enclosing jacket and go through a phase change to efficiently release the heat. Then cool and condense the coolant to return to the jacket. Bob Wilson
Delta wing is interesesting as a race car, but the design would never catch on in the US. Safety regs would impinge on usable space and make costs high for what you get. Think tesla model 3 with .21 coefficient of drag could even work as a hybrid or plug in hybrid with a liquid cooled rear engine. No engine up front means you can move front seat forward, and still be safer as no engine in crumpled into the cabin. Higher weight is fine at driving speeds if you can use regen braking on the front axis to recapture some of the energy. On liquid cooled permanant magnet motor versus tesla induction or toyota's hybrid motors, I'm not sure that makes much sense. Indusction seems to work well for lighter weight and higher rpm. Toyota does kind of a combination in their hsd motors. Permanant magnets use rare earth metals and people are moving away. Say induction is 5% less efficient (its not that much) and batteries cost $200/kwh (they are going lower), even on a 70 kwh vehicle you only need $700 more of batteries, in a hybrid you wouldn't even notice it. Question is can you build these for only $700 more?
