Humphrey proportional solenoid valves provide variable movement output from a corresponding input current. They function reduced hysteresis, excellent change down ratio's and cycle repeatability. Utilized in a broad variety of gasoline programs from clinical gadget and analytical tools, to manufacturing plant automation, packaging and mobile tools. Humphrey't style and anatomist expertise can solve application difficulties others cannot. Humphrey provides a style for you, whether it'beds off-the-shelf or tailored to your precise requirements.
A typical proportional valve driver consist of a H-bridge that is PWM driven. The base frequency is approx 2-5kHZ. Spark email for mac can you separate out email inboxes. You could use a DC motor or stepper motor driver with a chopper, to control the current. Model 805 PWM Proportional Valve/Solenoid Driver with Peak and Hold Modes. The Model 805 PWM Driver generates a high frequency, pulse width modulated, self-controlled variable duty cycle control output for proportional (current) controlled solenoid drive applications.