Solenoid valves - Bürkert Fluid Control Systems

1. Solenoid systems for solenoid valves
1.1.
Basics
Solenoid valves are the most frequently
used control elements in fluidics.
Their tasks are to shut off, release,
dose, distribute or mix gases and fluids.
They are confronted with many different
requirements in your application
areas, e.g.
■ fast and safe switching
■ high reliability
■ long service life
■ good medium compatibility of the
materials used
■ low control power
■ compact design.
Besides the plunger-type actuator
which is used most frequently, pivotedarmature
actuators and rocker actuators
are also used.
1.2.
The basic operating
principle of a solenoid
While the actuation system, mechanical
construction and the function as a
whole do indeed differ, fundamental
elements of the actuator are identical
on virtually all actuation principles. The
core of a solenoid consists of an electrical
magnet, which is also referred to
as a solenoid coil.
I
Coil
If an electric current flows through an
electrical conductor, e.g. an enameled
copper wire, this wire also generates
a magnetic field. This magnetic field
can be amplified by focusing the electrical
conductors in the form of a coil.
In addition to the number of windings
and the amperage, the iron circuit
around the solenoid coil also has a
substantial impact on the resultant
magnetic forces. Normally, the polarity
does not need to be noted.
In the following, we will explain the
mechanical construction of a solenoid
actuator using the example of a plunger-type
actuator.
Magnetic flux
Magnetic flux with electrical
actuation of a coil
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