| 摘要 |
PURPOSE:To supply component parts the adjustment of which has been completed for each kind of gas by constituting as one body an electromagnetic proportional control valve, a drive circuit for driving the electromagnetic proportional control valve, and adjustment circuit which completes for each kind of gas pressure adjustment for supply gas by adjusting input signal to the drive circuit. CONSTITUTION:Controlled input voltage is inputted to A, and after its upper limit value is set up by a maximum amount of combustion adjustment volume 2 and lower limit value by a minimum amount of combustion adjustment volume 3, the controlled input voltage is outputted to B to be inputted to a drive circuit 9. A differential amplifier 6 and an output transistor 7 work as a negative feedback amplifier, and its voltage and current conversion gain are determined by an emitter resistance 8. An output transistor 7 controls the current flowing into an electromagnetic coil from an electric power source + V, and the electromagnetic coil 10 attracts the inside moving iron 15 in an electromagnetic coil 10 to control the degrees of opening and closing of a valve 16 which is connected to the moving iron. Since an adjustment circuit 5 and the drive circuit 9 are constituted with the main body section of an electromagnetic gas proportional control valve 12, all of them form a constituent part. |
