YH-12A voltage regulator of a sealed electronic devices, by adjusting the excitation current in order to stabilize the output voltage of the brushless generator.
Technicial specification
Input
       Voltage           180-260V ac
Output
       Voltage            Max 90V dc at 240V ac input
       Current            Continuous 4A
                              Intermittent 7A for 10 secs
Voltage Regulation   ∠±1%(with 4% engine governing)