etherma electrical components Germany etherma model etherma price

etherma electrical components are components that can convert electrical energy into magnetic energy and store it. The structure of an inductor is similar to a transformer, but it has only one winding. An inductor has a certain inductance; it only impedes changes in current. If the inductor is in a state with no current flowing through it, when the circuit is connected, it will attempt to impede current from flowing through it; if the inductor is in a state with current flowing through it, when the circuit is disconnected, it will attempt to maintain the current unchanged. Inductors are also known as chokes, reactors, or dynamic reactors.

etherma electrical component types

Inductors can be made by winding conductive material, typically copper wire, around a magnetic core, or the magnetic core can be removed or replaced with ferromagnetic material. Core materials with higher permeability than air can confine the magnetic field more tightly around the inductive component, thereby increasing inductance. There are many types of inductors; most are made with enamel-coated coils wound around ferrite bobbins, while some shielded inductors place the coil completely inside the ferrite. The cores of some inductive components are adjustable, allowing the inductance value to be changed. Small inductors can be directly etched onto PCB boards using a method that lays down spiral traces. Small-value inductors can also be manufactured in integrated circuits using the same processes used for transistors. In these applications, aluminum interconnects are often used as the conductive material. Regardless of the method, due to practical constraints, the most commonly used approach is a circuit called a "gyrator," which uses a capacitor and active components to exhibit the same characteristics as an inductive component. Inductive components used for blocking high frequencies are often constructed from a metal wire passing through a magnetic pillar or bead.

etherma electrical component principles

The working principle of a discharge tube is gas gap discharge i When a certain voltage is applied between the two electrodes of the discharge tube, a non-uniform electric field is generated between the electrodes: under the action of this electric field, the gas inside the tube begins to ionize. When the external voltage increases to the point where the field strength between the electrodes exceeds the insulation strength of the gas, the gap between the two electrodes will break down and discharge, transforming from an original insulating state to a conductive state. After conduction, the voltage between the two electrodes of the discharge tube is maintained at a residual voltage level determined by the discharge arc channel. This residual voltage is generally very low, thereby protecting electronic equipment connected in parallel with the discharge tube from overvoltage damage.

etherma electrical component classification

Based on structural differences, they are classified into full-availability trunks, partial-availability trunks, and link systems; based on service modes, they are classified into loss-system trunks and waiting-system trunks (see stochastic service systems); based on the number of traffic sources served, they are classified into infinite-source trunks and finite-source trunks. In telecommunication systems, equipment directly used for communication between users is mostly an infinite-source loss-system full-availability link system, while equipment used to control the connection process of communication devices is mostly an infinite-source waiting-system full-availability system. When the number of traffic sources is not very large relative to the trunk capacity, a finite-source full-availability system or partial-availability system is generally adopted. Based on the call behavior of traffic sources, i.e., whether users make new call attempts after a call failure, trunks can be divided into repeated-call systems and non-repeated-call systems. Actual communication systems all have repeated calls; non-repeated-call systems are an approximation of repeated-call systems. ① Full-availability trunks. If any service device (trunk line or selector) in the trunk can be used by any traffic source in the group of traffic sources it serves, such a trunk is called a full-availability trunk. ② Partial-availability trunks. If any traffic source in the traffic source group can only use part of the service devices in the trunk, such a trunk is called a partial-availability trunk. Partial-availability trunks divide the traffic source group into several subgroups, performing grading and multiple connections between the outlets of the traffic groups. This structure can be described by the example shown in the figure below.

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