Magnetic Breaking

[xyster]

You want to see something really scary, how about this one

Fairly scary, yes indeed-e. You should post your WTF emblem over on the new V :-) See how long it stays before being replaced with two pages of legalese.

Yet that emblem is not half as frightening as your avatar, which frankly looks like a half-man, half-elk hybrid in heat.


I'm still partial to the "Fechmaster" caricature posted on the previous page, but she needs some serious facial reconstructive surgery. And her skin is kind of blotchy :-)

[TylerDurden]

I don't have any schematics, but I believe some electric power tools like circular saws use electric brakes.

My battery powered Black and Decker lawnmower definately does: If I only partially release the handle, the blade will coast, if I release entirely, the blade stops instantly.

[fechter]

Putting a short across the motor definitely puts on the brakes. One time my Zappy blew a FET and it siezed the rear wheel. Threw me right off. The controller's original regen feature was so strong it would cause the belt to skip, so I had to put a current limiter on it to reduce the force enough to prevent skipping.

[RatoN]

Ah you see Fechter, faith has chosen you to design a new kind of controller.

* Scalable 36v, 48v, 72v, 96v modes.

* Magnetic braking capability. ON/OFF

* Many battery packs 12v and 24v extra inputs for accessories for lights and stuff. Seperate lines from the main batt packs.

* Many outs plug-in for accessories 3v, 6v, 12v, 24v.


What else...??

[fechter]

What else?........

How about sensorless! no more hall wires.

How about having a low battery cutout, motor overtemp and controller overtemp that work by gradually backing off the throttle rather than suddenly dying right as you pull out in front of that Hummer.

Built-in BMS?
I see you got built-in DC-DC converter.

User adjustable limits for current, low voltage, ramp-up rate
Current mode or speed mode throttle. Speed mode works like cruise control.

A cool display that works like a Drain Brain and allows programming in the field.

Now if it could only be affordable too, that's the kicker.