PROPORTIONAL VALVE DRIVING DEVICE

摘要

The valve driver controls the linear valve by use of pulse modulated signals generated from a computer. The control driver make unnecesaary a constant current circuit, including many parts and occupying a wide space, and a computer or electronic switch does not break down even if a linear valve coil gets disconnected. The control driver comprises a rectification circuit; a linear valve circuit including a electronic switch with control terminals and a linear valve coil; a circuit for detecting current flowing in the coil; a circuit installed between the detection circuit and the micro computer and limiting a surged voltage; a circuit integrating the output generated from the current detection circuit; a micro computer; a means driving an electronic switch by sending the pulse modulated signal to the control terminals; a means compensating a target signal based on the current detection signals.