YH-15A(AVR) by adjusting the excitation current in order to stabilize the output voltage of the brushless generator.
Technical specification
Input
      Voltage    180-240V ac
Output
      Voltage    Max 90V dc at 240V ac input
      Current    Continuous  6A
                      Intermittent  12A for 10 secs
Regulation      ∠+/-0.5%(with 4% engine governing)