Power in Flux

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mpipes replied to the thread Noise issue related to Curtis 1238.
"
Quote Originally Posted by Spoonman View Post
Are you using appropriate logic fixing resistors at the inputs to your power loads in the absence of a control signal?
The lights are controlled by a commercially available LED module manufactured by Penta-Star. The inputs are 12V normally tapped directly from switched lighting circuits, and they also provide the main power for the module. There is no constant power to the unit so in absence of a signal, the unit is powered off.

Currently, there is no 12V source attached to the system at all while I'm testing and isolating issues, but I can measure 20mV on the 12V power bus when the Curtis motor control is powered on, so it makes sense that that weak voltage is causing the input to float. That voltage shouldnt be there at all though, and while dim lights arent a big deal, the future audio system picking up any noise is.

I now have the isolating mounts installed at both the Curtis and charger cases to ensure they are not coupled together through the carbon fiber chassis, and the 3-pole relay on the AC Mains input to the charger is also setup so it breaks the ground to the 12V bus while the dedicated Charge Mode is inactive. I did this because the charger internals ground the case and the 96V side together but there's no point having it connected to the system while it's not needed.

The lights are much much dimmer now after doing this so I'm getting somewhere, but still have some other ground loops to take care of. "

3 Hours Ago

furyphoto replied to the thread For Sale: HPEV's AC-20 motor - $900.
" I think we all want to know... What are you replacing it with? "

3 Hours Ago

mmeiss33 replied to the thread Kelly KLS96601-8080I with contactor.
" Did you ever get your sevcon gen4 size 6 working as anticipated? I am also between the Kelley and Sevcon and am primarily looking for off the line acceleration. "

5 Hours Ago

Ted Dillard replied to the thread Proper Forum Etiquette.
" Attachment 7970

Welcome back, Functional Artist! "

11 Hours Ago

Richard230 clicked Likes for this post: Power in Flux excerpt: The Blade by Ted Dillard

11 Hours Ago

Richard230 clicked Likes for this post: Power in Flux excerpt: The Blade by Ted Dillard

11 Hours Ago

Richard230 clicked Likes for this post: Debate of the Day: Experimental Chain Tensioner by Stevo

11 Hours Ago

mmeiss33 clicked Likes for this post: Sachs xtc 125 conversion by flo

13 Hours Ago

Ted Dillard replied to the thread Power in Flux excerpt: The Blade.
" Here are a few more breadcrumbs...

In the meantime, John Fiorenza, working at Briggs and Stratton, had
picked up a Lynch motor, tested it and torn it down, convinced Briggs and
Stratton to buy limited rights to the design and redesigned it to yield a
motor that was easier and cheaper to manufacture, yet nearly as powerful
and every bit as efficient as the Lynch: the ETEK. B&S intended to use these
motors for lawn and garden applications, as well as recreational products
(an outboard motor, for one example), but the license was fairly restrictive
on the use for vehicles.

The first ETEKs became available in 2001 and Schless got his hands on
a few: “We built prototypes with both motors. Cedric’s motor was better
and he was clearly 'da man', no doubt, but the ETEK was awesome and
inspiring because it was cheap, light and really more engineered for
production than the Lynch. Not much was sacrificed versus the Lynch,
provided you watched the thermal rise. I love the design of the first ETEK
even today. I have about 7 new ones in the box, the originals.”

With the boost in power from the ETEK as well as a significant increase
in weight, (from around 115lbs for the Denali, to about 150lbs for the new
design), Schless designed a bigger, more robust chassis with stronger forks
and wheels, a wheelbase and stance matcing a Honda CLF150, and nearly
250cc class performance: the Blade. The Blade, in 2001, was still running
lead-acid batteries yet arguably the first full-on electric motocross bike.

..tbc "

14 Hours Ago

Ted Dillard replied to the thread Power in Flux excerpt: The Blade.
" I know Ely spends (used to spend?) a lot of time on Endless Sphere - haven't seen him here though. "

14 Hours Ago

Ted Dillard clicked Likes for this post: Power in Flux excerpt: The Blade by Stevo

14 Hours Ago

Stevo replied to the thread Power in Flux excerpt: The Blade.
" THAT'S what I'm talkin' about!! Very cool Ted! Maybe others on here can add to this thread as well, (Maybe Ely himself!)
Carry on! "

14 Hours Ago

Stevo replied to the thread Debate of the Day: Experimental Chain Tensioner.
" So I got to thinking about chain derailers on mountain bikes/street bicycles and how the "double-ider" is utilized to remove/control all of the required chain slack in those drive systems. The wheels are spinning (in my head). "

15 Hours Ago

Stevo replied to the thread Hello, everyone!.
" Not sure if I'm any help, because I'm still bein' schooled myself! "

15 Hours Ago

Ted Dillard replied to the thread Power in Flux excerpt: The Blade.

15 Hours Ago

Stevo clicked Likes for this post: Hello, everyone! by DoodleWalsh

15 Hours Ago

Ted Dillard replied to the thread Power in Flux excerpt: The Blade.
" Oh lordy. But I DID put in ONE photo! lol

No, I don't have much more in the way of photography than what's in the book, but if I have some time I'll try to scare some up. "

15 Hours Ago

Stevo replied to the thread Power in Flux excerpt: The Blade.
" I was actually requesting the pics for this write-up that your doing here.... since you are using this media. I mean, internet story telling without pics IS kinda boring! "

15 Hours Ago

Stevo clicked Likes for this post: Proper Forum Etiquette by Electro Flyers

15 Hours Ago

Ted Dillard replied to the thread Power in Flux excerpt: The Blade.
" LOL

I had to decide if this was going to be a picture book or, well, not, and went with not. As it is, it was over 300 pages...

...maybe there's interest? "

15 Hours Ago