Thu Oct 25, 2012 7:40 pm
Fri Oct 26, 2012 9:17 am
Fri Oct 26, 2012 9:26 am
Fri Oct 26, 2012 12:25 pm
Fri Oct 26, 2012 2:10 pm
Fri Oct 26, 2012 3:54 pm
Fri Oct 26, 2012 4:36 pm
JackF wrote:Bus Driver, Landreo, Eugene and Jim
When you stated; diode trio is for the field current it seems as though the diode trio only operates low amperage part of the generator. This part confuses me because it’s attached to the rectifier and what I can see in the diagram is; the voltage regulator grounds the diode trio when current is required.
The diode trio is only for the field current through the regulator, standard "A" circuit like cub voltage regulators. THe diode trio is not connected to the bridge output. They share a common connection with the stator windings but the diode trio gets AC current from the stator not the DC coming out the other side of the bridge. The AC connection is all they have in common.
With the generator operating, AC voltages are generated in the stator windings, and the stator supplies DC field current through the diode trio, the field, TR1, and then through the grounded diodes in the rectifier bridge back to the stator. Also, the six diodes in the bridge rectifier change the stator AC voltages to a DC voltage which appears between ground and the generator "BAT" terminal which is connected to the storage cell. (Battery)
The field current starts at the stator windings to the common connection with the stator, diode trio, bridge. The bridge goes to the battery as high amp dc, AC from the stator goes to the trio to form the dc field current. No connection between the bridge and the trio outputs. The trio dc goes to the voltage regulator then to the field windings and then the ground. D2, zener diode, with a resistor voltage divider is the voltage sensor, t2 is the voltage on off that controls t3 then the power transistor t1 which controls the field current. D1 is a commutator diode for voltage spikes and does not affect directly the operation of the regulator nor does it carry any field current. The one 10 si regulator I unpotted and reversed actually had only t1 and t2. THe posted diagram may apply to a 12si
The end result is that the field and diode trio are independent of the bridge rectifier. The field current likely is only a few amps so no need for a large diode capacity for the diode trio.
Boring to many but I like "how does it work" discussions.
Fri Oct 26, 2012 5:55 pm
Boring to many but I like "how does it work" discussions
Sat Oct 27, 2012 11:10 am
THe posted diagram may apply to a 12si
Sun Oct 28, 2012 8:38 am
Sun Oct 28, 2012 6:27 pm
Tue Oct 30, 2012 6:21 pm
Tue Oct 30, 2012 9:27 pm
Thu Nov 08, 2012 5:36 pm
Thu Nov 08, 2012 6:08 pm