[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: (ET) chargers
- Subject: RE: (ET) chargers
- From: "David Roden (Akron OH USA)" <roden ald net>
- Date: Wed, 1 May 2002 21:59:44 -0400
- In-reply-to: <004101c1f163$0b7e7de0$0e01a8c0 dev1>
- References: <3CD05721 2F32606D realns com>
- Sender: owner-elec-trak cosmos phy tufts edu
On 1 May 2002 at 16:53, SolidTech wrote:
> So, to use this type of controller what happens
> to the field weakening - just not used?
This looks like a Curtis of some type. It's most likely designed for
I've thought about trying one of these on the ET, but hesitated. The
that series motor controllers count on having a fair bit of inductance in
motor (thanks to the series field), and I'm not at all sure that the ET
What happens of there's not enough motor inductance? A couple things, I
think (I'm not an engineer, I'm going on a somewhat hazy understanding
so someone should correct any misstatements I make).
First, Curtis controllers seem to start very jerkily when there's not
motor inductance. It's like starting in maybe speed 2. To me, having
low-speed control is the big advantage of a transistor controller, so if
missing, I'm not very interested.
Second, I think that if the inductance is too low, the current limit
right. This can cause the MOSFETs to commit hari-kari (burn out) if you
overload the motor.
I'd say "proceed with caution," and let us know how it goes.
BTW, if you miss this one, no sweat. I'm pretty sure these guys have been
selling these controllers for quite a while (the name sounds familiar).
can also get rebuilt Curtis golf car controllers for a little more,
around $175-220 or so, from Golf Tech Industries :
Akron OH USA