---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 05/10/19: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:45 AM - Re: alternator field current (nuckollsr) 2. 03:58 PM - New Battery Minder evaulation (Robert L. Nuckolls, III) 3. 07:06 PM - Lightspeed Plasma III Wiring () ________________________________ Message 1 _____________________________________ Time: 09:45:38 AM PST US Subject: AeroElectric-List: Re: alternator field current From: "nuckollsr" Interesting . . . I've seen some 'heavy duty' regulators in other venues as well. But I'm at a loss to recall any that even begin to draw that much field current. A prudent designer of generators and alternators will strive to minimize the necessary field current. While field current goes to creating a controllable magnetic flux for the purposes of mechanical-to-electrical energy conversion, the strength of the field is proportional to turns of field coil wire multiplied by current in those wires. It's theoretically possible to generate any desired field flux intensity at any practical current level. The largest alternators I've worked with needed no more than 3 or so amps in either 14 or 28v systems. Field current is 100% wasted energy. 3A at 28V dumps 84 watts of heat directly into the core of the machine. No doubt someone found value in crafting 'heavy duty' devices CAPABLE of driving a low resistance alternator field . . . but I think one would be hard pressed to find such a machine. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=489164#489164 ________________________________ Message 2 _____________________________________ Time: 03:58:04 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: New Battery Minder evaulation List member Steve Stearns has donated an excellent candidate for evaluating performance of a new BatteryMinder Plus that claims to include 'de-sulfation' technology. The nameplate rating is 20 a.h. and claims to be a 'deep cycle' device. I benchmarked Steve's battery and collected the following data plot: Emacs! I'll put it on the BatteryMinder's maintenance mode and see what the critter looks like in about 60 days. Watch this space. Bob . . . ________________________________ Message 3 _____________________________________ Time: 07:06:56 PM PST US From: Subject: AeroElectric-List: Lightspeed Plasma III Wiring Does anyone out there happen to have a Plasma III for six cylinder laying about where you can help me trace the wires from the hall effect 9 PC board to the 15 pin input connector? As I mentioned before, the 15 pin input connector on my Plasma III had to be cut off to remove the engine (firewall hole was too small and I did not want to unbolt the prop to hang the timing sensors loose) so now I have to field install the 15 pin connector. The installation manual is well written however it does not state the colors of the 9 wires that run from the crank sensor PC board to the 15 pin connector. If I knew what colors the wires were that powers channel A / B / C then I could deduce the respective black and bare wires. Inside the single large cable are three shielded sub-cables and each sub-cable has a black wire, a bare non-insulated wire, and then the third wire is the only difference and that would be either a white or green or red wire. Can you please tell me what color wires are connected to the following pins: Channel A: PIN 3 of the HALL EFFECT sensor is a ??? wire and it connects to PIN 4 of the INPUT CONNECTOR (this is a 5 VDC power to the HALL EFFECT sensor and it shares PIN 4 with channel C) If I knew what color wire was Channel A then I could deduce the respective black and bare wires. Channel B: PIN 7 of the HALL EFFECT sensor is a ??? wire and it connects to PIN 5 of the INPUT CONNECTOR (this is a 5 VDC power to the HALL EFFECT sensor) If I knew what color wire was Channel B then I could deduce the respective black and bare wires. Channel C: PIN 4 of the HALL EFFECT sensor is a ??? wire and it also connects to PIN 4 of the INPUT CONNECTOR (this is a 5 VDC power to the HALL EFFECT sensor and it shares pin 4 with channel A) If I knew what color wire was Channel C then I could deduce the respective black and bare wires. If nobody has one of these systems opened up or accessible with the prop off then I will sadly need to remove the propeller...Grrrrr. Any help would be greatly appreciated!!! .. Thanks, Bill Hunter ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.