Voltage Regulation

Voltage Regulation

Standard Regulator







The Electronic Regulator uses a zener diode that blocks current flow until a specified voltage is obtained.

Sensing current from terminal 2 passes through a thermistor to the zener diode (D2). As the system voltage exceeds the breakdown voltage Of the zener diode, current flows through the zener diode turning transistor 2 (TR2) on.
With TR2 on transistor 1 (TR1) is shut off.

Transistor 1 controls field current to the rotor.
With TR1 off no current flows to the field coil and the generator has no output.

A voltage drop below the breakdown voltage of the zener diode stops the current flow to TR2 which turns on TR1.
Voltage is again applied to the field allowing the generator to produce voltage.







Multifunction Controller














The Multifunction Controller regulates voltage in the same manner as the standard voltage regulator. Regulation is through duty cycle control of the field coil.
The differences as compared to the standard regulator are:
- Manner in which malfunction indicator lamp is controlled.
- Connections to wiring harness.