---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 06/30/15: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:14 AM - Re: Re: Alternator problem? (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 08:14:47 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Alternator problem? >In doing this, wouldn=99t one be just moving the >problems that have been discussed in great >detail, of why we should not use internally >regulated alternators.=C2 The internal regulators >do not react kindly to turning the alternator on and off. It's not a matter of 'not taking kindly' . . . its the conditions surrounding a failure modes. Off the shelf, internally regulated alternators have a runaway failure mode wherein the alternator CANNOT be shut off from outside. This is why some folks remove the built in regulator (B&C) and others wire around the regulator (Plane-Power) to effect positive external control of field excitation for the purpose of turning it ON or OFF at will, or shutting it down if the regulator goes TU. A myth commonly circulated throughout the vehicular DC power systems world is that it is undesirable, dangerous, deleterious, or (as has been articulated here on the List) just plain stupid to turn an operating alternator ON and OFF at will. It's a well circulated, overly fertilized myth easily demonstrated to be horse-pucky. The desirability for and effects of random or purposeful control of an alternator at will are completely benign to the alternator and equipment it powers. But if the regulator wanders into the weeds, you gotta have a method to turn the thing OFF (or disconnect it from the airplane) in a timely fashion while minimizing smoke and flames. Bob . . . ------------------------------------------------------------------------------------- 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.