The start motor example with a fixed commutation angle is simply not comparable to the sophistication found in 3-phase motors (with either PM or electrically-excited rotors) with high-frequency inverter drives that have been used widely in industry for 2-3 decades and now EVs. Every factory robot has five or more servomotor axes using the same technologies.
EV manufacturers are doing a pretty good job already optimising the efficiency and utilisation to be competitive. Motor speeds have been climbing and many are in the 15k-20k RPM range now. Many now use oil-wetted rotors and stators for cooling and lubrication rather than a coolant jacket and grease-packed sealed bearings. That also allows better mechanical integration with the gear reducer as no intermediate seals are needed.
There are still options to build DIY EVs with aftermarket controllers and motors but the focus is more on re-powering old ICE cars rather than applying cutting edge technology. It would be very hard to improve on what you can buy off the shelf today from the market leaders.
The Borg-Warner unit discussed in Weber Auto's video apparently can be purchased for such projects and I'd suggest it's a very good design.
EV manufacturers are doing a pretty good job already optimising the efficiency and utilisation to be competitive. Motor speeds have been climbing and many are in the 15k-20k RPM range now. Many now use oil-wetted rotors and stators for cooling and lubrication rather than a coolant jacket and grease-packed sealed bearings. That also allows better mechanical integration with the gear reducer as no intermediate seals are needed.
There are still options to build DIY EVs with aftermarket controllers and motors but the focus is more on re-powering old ICE cars rather than applying cutting edge technology. It would be very hard to improve on what you can buy off the shelf today from the market leaders.
The Borg-Warner unit discussed in Weber Auto's video apparently can be purchased for such projects and I'd suggest it's a very good design.