RE: DC Motor

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Yurtle Turtle <yurtle_t@xxxxxxxxx>

Thanks. The hoist says it's a .6 hp motor, though it's
similar in size to my 1 hp treadmill motor. The
circuit board that came with it was apparently only an
inch wide by 2 to 3 wide, so no room for a MOT ;) I
have several BR104's, which are rated to 400 volts at
10 amps. The motor pulls less than 1 amp unloaded.
Given the size of the wires to the reverse switch, I'd
say 10 amps is plenty.

>From the little I know, I assume it had either just a
cap, or a pi type filter with two caps and a choke.
I'm just unsure how to go about sizing them. Does
anyone know of any good online progs for doing this?

Adam

--- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>
>
> Hi Adam,
> I have a similar scenario, I plan to add filtering
> just to stiffen the
> supply. Fullwave diode, 35amp 600 piv (all
> electronics fwb-356 cheap), and a
> variac. I have a box full of 200v X1000uf caps (I'll
> bleed them). A choke
> (primary of a mot perhaps) insulate the output for
> more indutance in between
> a set than half the capacitance on the output, helps
> as a multiplier from
> way back in my memory.
>
> I'm going to cheat though, I also have a PWM control
> that will work on most
> PM brush type motors @120DC 45 amps tops, I also
> have spec plates. The leads
> coming back will be going through a reactor then a
> RF filter that has an
> inductive though path. What is the max current the
> motor will draw is the
> question. Tip, there is a lot of high power three
> phase stuff out there that
> should work fine with single phase. Maybe someone
> wants to do the ripple
> math and come up with a capacitance recommendation?
> Not my forte.
>
> Jim Mora
>
> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Saturday, April 15, 2006 10:58 AM
> To: tesla@xxxxxxxxxx
> Subject: DC Motor
>
> Original poster: Yurtle Turtle <yurtle_t@xxxxxxxxx>
>
> I inherited the following DC motor:
>
> Mamco 11/17/03
> (illegible)-100-124 DI
> 100 VDC RR M
>
> It's from a 120 vac portable winch. The DC motor
> looks
> almost identical to a 90 v DC treadmill motor I
> have.
> Unfortunately, it didn't come with the PSU. I've
> emailed Mamco a while back to see what the voltage
> range is, but they're apparently not going to reply.
> Does anyone know if I can simply run this motor off
> of
> a BR104 rectifier, or should I filter the output.
> I've
> run it with just rectified ac under no-load, and can
> control speed by using an upstream variac. Since the
> motor appears to say 100 vdc, will I hurt it but
> running it off of straight rectified, or even
> filtered
> AC, without some sort of voltage regulator?
>
> If I use it for an RSG, the duty cycle and load
> should
> be so low that I'm not as concerned. However, I'd
> like
> to build my PSU such that I could use it as a winch
> if
> I decide to do so.
>
> If it needs a filter, I'm afraid I'm out of my
> league.
> I've Googled for filter design and circuits, but
> most
> are way under 100 vdc.
>
> thanks
> Adam
>
>
>