Hm...
If the wheel has rating only up to 27mph i expect it is due to tire design or structure. Auto tires have speed rating as well. I think this tire will pop at anything over 40mph. https://www.tirerack.com/tires/tiretech/techpage.jsp?techid=35
The other is the KV of the motor. It will not want to run over that speed.
So in case you want to use gas engine on the rear wheel and hub motors on front at highway speeds i recommend you verify if controller has release function. I have seen this as a switch in wiring. When applied this feeds motor with just enough modulation for magnets to turn with 0A. This would allow you to run the gas motor without hubs in regen. But i cant imagine what inverter would do at highway speeds. My guess is backEMF spikes from motor would fry reverse diodes in transistors.
First of all i recommend you use scooter or motorcycle wheels for that speed and go and compare at what speeds motor is designed to run at. Any PM controller with correct voltage would do if motor has correct KV and battery voltage is sufficient to turn it at such speed.
I suspect if you have $$$ to buy LiTi cells you should have money to buy proper hardware also.
Some items to compare...
https://www.kellycontrollers.eu/hub-motor-48v-3kw-high-speed
https://www.kellycontrollers.eu/hub-motor-72v-45kw-high-speed
https://www.ebay.co.uk/itm/60v-72v-...290571?hash=item26255823cb:g:7F0AAOSwhpBdTFEx
https://kellycontroller.com/shop/kl...tribute_pa_current=350a&attribute_enclosure=N
https://kellycontroller.com/shop/kls-h/
If the wheel has rating only up to 27mph i expect it is due to tire design or structure. Auto tires have speed rating as well. I think this tire will pop at anything over 40mph. https://www.tirerack.com/tires/tiretech/techpage.jsp?techid=35
The other is the KV of the motor. It will not want to run over that speed.
So in case you want to use gas engine on the rear wheel and hub motors on front at highway speeds i recommend you verify if controller has release function. I have seen this as a switch in wiring. When applied this feeds motor with just enough modulation for magnets to turn with 0A. This would allow you to run the gas motor without hubs in regen. But i cant imagine what inverter would do at highway speeds. My guess is backEMF spikes from motor would fry reverse diodes in transistors.
First of all i recommend you use scooter or motorcycle wheels for that speed and go and compare at what speeds motor is designed to run at. Any PM controller with correct voltage would do if motor has correct KV and battery voltage is sufficient to turn it at such speed.
I suspect if you have $$$ to buy LiTi cells you should have money to buy proper hardware also.
Some items to compare...
https://www.kellycontrollers.eu/hub-motor-48v-3kw-high-speed
https://www.kellycontrollers.eu/hub-motor-72v-45kw-high-speed
https://www.ebay.co.uk/itm/60v-72v-...290571?hash=item26255823cb:g:7F0AAOSwhpBdTFEx
https://kellycontroller.com/shop/kl...tribute_pa_current=350a&attribute_enclosure=N
https://kellycontroller.com/shop/kls-h/