Energizing circuit for magnetic valves

Abstract

Abstract In the case of magnetic valves in metering devices which are excited by pulses, on the one hand rapid opening and closing of the valve is required, and on the other hand a power consumption and heat dissipation which are as low as possible are demanded. For this purpose, the energising coil (L) of the magnetic valve can be connected via two switch paths (T3, T5), connected in series, initially to a higher voltage trigger current source (U1) and, once the valve has opened, to a maintaining current source (U2) at a lower voltage. The changeover takes place either by means of a timer (R, C, T1) or by means of a sensor circuit sampling the position of the moving magnetic core of the magnetic valve, or its closing body. If a timer is used, this can be connected upstream of a switching transistor (T5), connecting the energising coil (L) to the trigger current source (U1), as an individual pulse transmitter. (Fig. 4): <IMAGE>

Inventors

• 👤 Christinus Antoinetta Paulus Van Liempd
• 👤 Robertus Josephus Van Nuland

Bibliographic Details