Yangtze River 1.5kW gasoline generator thyristor voltage regulating circuit

When the gasoline generator starts, press the start button SB, the magnetic field winding BQ
forms a loop through the diode VD4 and the current limiting resistor Rio, the excitation current increases, and the generator output voltage increases. When the voltage is close to the rated voltage
, release SB and the generator will enter the automatic excitation working state. In the figure, S is the demagnetization switch, which is demagnetized when it is turned off.