electromagnetic disk brakes

[cycleboy]

to me it seems like a pretty sound idea using electromagnets to attarct to the disk to pull the brake pads together but i would like some other opinions on my idea

 

[IRstuff]

still can't see it as a viable idea

> if power is lost, brakes lock if using the spring hold-back, which is bad, since that means that you are unable to coast to a safe stop
> if only the alternator is lost, the power consumption would kill the battery faster than if you only had to power the lights.
> the magnetic clutch on my A/C is already way bigger than my brake caliper, and provides less force
> trying to use spring load means that a strong spring requires that much more of a strong magnet to pull it back
> the hold back of the spring requires constant power consumption from the vehicle, which means lower gas mileage
> there would need to be a fairly complicated and complex electronic feedback control circuit to provide the same behavior that a normal braking system would have
> ditto for providing feedback to the driver's foot

TTFN