AVR

The Automatic Voltage Regulator (AVR) for self-excited brushless synchronous AC generators is a critical control module that stabilizes output voltage by dynamically adjusting the excitation current of the generator’s rotating field. Utilizing phase-controlled thyristor technology, it monitors generator terminal voltage and compensates for load fluctuations or speed variations to maintain ±1% voltage precision. Key features include:

• No-brush design: Eliminates mechanical wear via static excitation systems, ensuring reliability in harsh environments (dust, humidity).
• Multi-protection: Integrated under-frequency roll-off (F/V curve), overvoltage cutoff, and excitation current limiting.
• Parallel compatibility: Supports droop compensation for load-sharing in multi-generator setups.
  Compatible with 50/60Hz systems, it operates across 190-480VAC inputs and delivers up to 90VDC excitation output. Widely used in industrial power stations, marine systems, and emergency backup units.