Question about Bosch Electrical Supplies
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Posted on Jan 02, 2017
There was a day and time when generators were simple. There were no capacitors, regulators to control/adjust power to magnet or ground fault outlets. Winding getting hot indicates short, however could be bad capacitors. Rectifiers and capacitors must be removed from circuit to test properly. Here is a simple test that I use to find fault area. I use a small power supply (16v AC 1 amp like doorbell transformer) into the 110v outlet of generator. This should energize the armature magnet and actually produce voltage at commutator with brushes pulled off. You can slowly pull the starter rope to move the armature into a different positon the voltage will vary. If the ac windings are shorted there will be very little or no magnet. There is a seperate 110 v circuit at the 220v outlet to test (there are two 110v windings that make up the 220v outlet, one is also used for the 110v outlet). There is another winding that products voltage for the regulator that powers the magnet thru the brushes but I think that circuit is porbably working because of the heat in the windings. You might even have 110v power at the 220v outlet. As our parents told us over and over, be careful when working with electricity. Enjoy
Posted on Dec 08, 2008
Ok I'm going to try this from memory...last time used it was a few years back when wiring up a big boat. Large (B+) wire goes from battery to large terminal on alternator back. Facing the rear of the alternator, top spade connector on alt goes to a switch (there was supposed to be a resistor in that wire, but I never used one) switch connects to (+) on battery. Terminal on right goes to the (B+) terminal on alternator. Alt case is ground.
I can't find my old chiltons electrical book but that is how I remember it.
Posted on Apr 07, 2009
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