X2flier
10 W
- Joined
- Jun 25, 2018
- Messages
- 79
ES,
I have been looking at the Kepler Friction Drive designs here. One little outrunner motor drives a bike at respectable speeds. There are no gears, and no wasted power. A light-bulb got illuminated, in my head.
It's probably not an original idea, but given the size of hub motors now, I'd like to see outrunner motors with an outside rim that can mount a tire on it, such as a bike tire, motorcycle tire, or car tire. The current hub motors today are just that, but if built larger, and as outrunners, they would be lightweight, efficient, and powerful in torque. These motors could use disk brakes like the regular hub motors do now, and can even be designed "heavy-duty" enough for a motorcycle or car. Take any bike, motorcycle, or car and bolt in the appropriate-sized outrunner motor where a drive wheel might be. For a car, you could have two of these wheel motors to make a conventional front-wheel drive city car (with no CV joints or differential), or four such motors to make an all-wheel drive snow car. Powering every wheel that touches the ground gives real advantages in handling. Electric braking or regenerative braking (not the same thing) would also be possible.
This trick would make retro-fitting any bike or car today into an easy task, and quite affordable, as opposed to building complete vehicles made for our existing electric motors.
I have seen various electric powered wheels that make me think this concept is absolutely practical, and maybe the end of conventional ICE powered cars. A "hybrid" then would have a straight drive between any fueled engine, even a rotary or turbine, to a generator that charges the batteries. No gearing or other power-losing devices would be needed. The fueled engine would only be used intermittently on longer trips, if needed, between the usual re-charges when stopped. Rotary engines and turbines can be very efficient of fuel, when they only need to operate at one speed, flat out.
I have been looking at the Kepler Friction Drive designs here. One little outrunner motor drives a bike at respectable speeds. There are no gears, and no wasted power. A light-bulb got illuminated, in my head.
It's probably not an original idea, but given the size of hub motors now, I'd like to see outrunner motors with an outside rim that can mount a tire on it, such as a bike tire, motorcycle tire, or car tire. The current hub motors today are just that, but if built larger, and as outrunners, they would be lightweight, efficient, and powerful in torque. These motors could use disk brakes like the regular hub motors do now, and can even be designed "heavy-duty" enough for a motorcycle or car. Take any bike, motorcycle, or car and bolt in the appropriate-sized outrunner motor where a drive wheel might be. For a car, you could have two of these wheel motors to make a conventional front-wheel drive city car (with no CV joints or differential), or four such motors to make an all-wheel drive snow car. Powering every wheel that touches the ground gives real advantages in handling. Electric braking or regenerative braking (not the same thing) would also be possible.
This trick would make retro-fitting any bike or car today into an easy task, and quite affordable, as opposed to building complete vehicles made for our existing electric motors.
I have seen various electric powered wheels that make me think this concept is absolutely practical, and maybe the end of conventional ICE powered cars. A "hybrid" then would have a straight drive between any fueled engine, even a rotary or turbine, to a generator that charges the batteries. No gearing or other power-losing devices would be needed. The fueled engine would only be used intermittently on longer trips, if needed, between the usual re-charges when stopped. Rotary engines and turbines can be very efficient of fuel, when they only need to operate at one speed, flat out.