seems like the time constant gets bigger even faster with the bigger motor.
- Original Message -
From: Lee Hart
Sent: 08/17/13 11:05 AM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] S.E.P.X . controller for 500V , 450Amp Motor
The L/R time constant will be slower, but not *that* much
evdragra...@email.com wrote:
So you have this 2600 lb motor with lots of inductance. If I
understand things right, you are at the mercy of the inductance for
how fast the current in the motor changes. Could it be enough
inductance that you'd hit the gas and the current wouldn't ramp up
for second
[EVDL] S.E.P.X . controller for 500V , 450Amp Motor
evdragra...@email.com wrote: > Lee I agree some inductance is good for a
controller -- but surely > it's possible to have too much? I don't think so;
not as a practical matter. The controller is nothing but a switch. It connect
evdragra...@email.com wrote:
Lee I agree some inductance is good for a controller -- but surely
it's possible to have too much?
I don't think so; not as a practical matter. The controller is nothing
but a switch. It connects the motor across the battery pack, and waits
for the current to ramp
ging current as a
> function of inductance? Would you have to slew 15x slower if you have 15x
> the inductance?
> - Original Message -
> From: Lee Hart
> Sent: 08/13/13 12:37 PM
> To: Electric Vehicle Discussion List
> Subject: Re: [EVDL] S.E.P.X . controller for 500V ,
ld you have to slew 15x slower if you have 15x
> the inductance?
> - Original Message -
> From: Lee Hart
> Sent: 08/13/13 12:37 PM
> To: Electric Vehicle Discussion List
> Subject: Re: [EVDL] S.E.P.X . controller for 500V , 450Amp Motor
> ...
>
> evdragra...@ema
t safe rate for changing current as a function of inductance? Would you
have to slew 15x slower if you have 15x the inductance?
- Original Message -
From: Lee Hart
Sent: 08/13/13 12:37 PM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] S.E.P.X . controller for 500V , 450Amp Moto
evdragra...@email.com wrote:
A sepex motor can do great regen.
I agree! I used a sepex motor (Aircraft starter-generator) in my first
EV, with a home-made contactor controller. Awesome 500 amp regen, even
from this "tiny" 70 lbs generator! It was enough to skid the back tires
on dry pavement
costly to replace. I would humbly suggest figuring things
out on a small, cheap sepex motor first.
- Original Message -
From: Bruce EVangel Parmenter
Sent: 08/12/13 07:35 PM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] S.E.P.X . controller for 500V , 450Amp Motor
The previous
The previous post I made on this topic listed AC and DC controllers.
For such a heavy EV, it really makes sense to have regen, not only to
regain some energy, reduce brake wear, and the dynamic braking is safer
driving (you have both the motor and the friction brake to slow/stop the
heavy EV. An A
ssage-
From: ev-boun...@lists.evdl.org [mailto:ev-boun...@lists.evdl.org] On Behalf Of
Jeff Major
Sent: Monday, August 12, 2013 11:55 AM
To: Electric Vehicle Discussion List
Subject: [EVDL] S.E.P.X . controller for 500V , 450Amp Motor
- Forwarded Message -
From: Jeff Major
To: Ele
- Forwarded Message -
From: Jeff Major
To: Electric Vehicle Discussion List
Sent: Monday, August 12, 2013 12:12 PM
Subject: Re: [EVDL] S.E.P.X . controller for 500V , 450Amp Motor
So what controller was this project manager planning to use?
I'd scrap the DC idea and see if
RPM
{brucedp.150m.com}
-
From: Steve Clunn
To: ev@lists.evdl.org
Sent: Monday, August 12, 2013 9:37 AM
Subject: [EVDL] S.E.P.X . controller for 500V , 450Amp Motor
I have an opportunity to get in on an 18 Wheeler build. The problem is,
the project manager has already bought the motor. A
[EVDL] S.E.P.X . controller for 500V , 450Amp Motor
I have an opportunity to get in on an 18 Wheeler build. The problem is,
the project manager has already bought the motor. A 2600lbs Monster, a
S.E.P.X. 500V, 450 amp.. its name plate says Armature 500v, 460amps and the
field , 300V, 6 amps. We
Steve Clunn wrote:
I have an opportunity to get in on an 18 Wheeler build. The problem is,
the project manager has already bought the motor. A 2600lbs Monster, a
S.E.P.X. 500V, 450 amp.. its name plate says Armature 500v, 460amps and the
field , 300V, 6 amps. We spun the motor over with a 12
I have an opportunity to get in on an 18 Wheeler build. The problem is,
the project manager has already bought the motor. A 2600lbs Monster, a
S.E.P.X. 500V, 450 amp.. its name plate says Armature 500v, 460amps and the
field , 300V, 6 amps. We spun the motor over with a 12V battery, and it
doe
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