A generator must maintain two critical electrical characteristics: voltage and frequency. The AVR regulates voltage, while the governor regulates engine speed and, therefore, frequency. This guide explains how each control loop works, what causes voltage or frequency to drift, and how to specify the regulation performance your application requires. Two Control Loops, Two Different Jobs […]
What Is an Automatic Voltage Regulator (AVR) and Why It Matters
An automatic voltage regulator (AVR) is an electronic device that maintains a generator’s output voltage at a stable, preset level. In diesel and other standby generators, the AVR continuously monitors voltage at the generator terminals and automatically adjusts the alternator’s excitation to compensate for load changes. This prevents voltage from rising too high or dropping […]
