12 Volt Generator
Page created by T June 10th 2008:
12 Volt Generator:
At the rear of the Generator is a small access hole for oiling the rear phosper bronze bush. This should be done every Tuneup. The front Generator Bearing is a Ball Bearing and does not get any routine maintenance. The Ball Bearing is greased during assembly.
The Regulator has 3 internal Relays.
Voltage Regulator:The Voltage Regulator Relay controls the Generator Output Voltage by controlling the current fed into the Field Windings in the Generator.The current can be direct, fed through a Resistor or cut off. The Voltage Regulator Relay provides a large current, a small current or no current at all as required to keep the output Voltage at 13.8 volts.
The second Relay in the unit is called the Cut-Off Relay. This Relay is pulled in when the Generator's output voltage is higher than the Battery's voltage. It opens when the Generator's Voltage is lower than the Battery's Voltage to prevent the Battery discharging through the Generator and burning it out.
Unlike Alternators, Generators cannot self limit their own maximum Current Output. As a result they have to be protected from excessive output.