Re: DC motor reverses when lost of power

From: Montoya (simon0630_at_yahoo.com)
Date: 01/15/04 

Date: 14 Jan 2004 22:53:26 -0800

Bryan Hackney <bh.remove@bhconsult.com> wrote in message news:<C8gNb.7951$%k4.3735@newssvr22.news.prodigy.com>...
> Montoya wrote:
> [...]
>
> > Hi, friends,
> > Thx for your advice. Maybe the problem needs more clarification. I now
> > have 2 devices, device A & B. A is with motor, but no power. B has
> > power. Whenever A and B contact, the motor on A is power by the B. Now
> > what i want is when A left B (A is lost of power), the motor on A
> > could spin back for 10 turns before it stops. Actually H bridge or
> > some logic circuits with big cap could do this. But space is a problem
> > for me. I am just exploring new ways to rotate back the motor. Just
> > thinking of using magnetic machanical force may help.
> > Montoya
>
> Still not enough information, but here's a try:
>
> Use a torsional spring and a clutch that slips after 10 turns. The motor
> has to be strong enough to overcome the clutch friction, and the spring
> has to be selected to wind up 10 times before the clutch slips - maybe
> not possible.

Using a torsional spring is good idea, but unfortunately my motor's
max torque is only in terms of mW. which makes it hard to overcome
some friction.

Relevant Pages

  • Re: DC motor reverses when lost of power
    ... Montoya wrote: ... Maybe the problem needs more clarification. ... the motor on A is power by the B. Now ...
    (comp.arch.embedded)
  • Re: DC motor reverses when lost of power
    ... >> You haven't said how long the motor has to run after power is shut off. ... Maybe the problem needs more clarification. ... some logic circuits with big cap could do this. ...
    (comp.arch.embedded)