WoHRLE electrical components Germany WoHRLE model WoHRLE price

WoHRLE electrical components consist of wire wound turn by turn on an insulating tube. The wires are mutually insulated, and the insulating tube can be hollow or contain an iron core or magnetic powder core. An inductor coil is a device that operates based on the principle of electromagnetic induction. When current flows through a wire, it generates an electromagnetic field around the wire, and this electromagnetic field induces effects on the wire itself within the field range. The effect on the wire generating the electromagnetic field is called "self-inductance," meaning the changing current generated by the wire itself produces a changing magnetic field, which further affects the current in the wire; the effect on other wires within the range of this electromagnetic field is called "mutual inductance." The electrical characteristics of an inductor coil are opposite to those of a capacitor: "passes low frequencies, blocks high frequencies." High-frequency signals encounter significant resistance when passing through an inductor coil and are difficult to pass through; whereas the resistance presented to low-frequency signals is relatively small, allowing them to pass through more easily. The resistance of an inductor coil to direct current is almost zero. Resistance, capacitance, and inductance all present certain resistance to the flow of electrical signals in a circuit; this resistance is referred to as "impedance." The impedance presented by an inductor coil to current signals utilizes the self-inductance of the coil. Inductor coils are sometimes abbreviated as "inductance" or "coil," represented by the letter "L." When winding an inductor coil, the number of turns wound is generally referred to as the "number of turns" of the coil.

WoHRLE electrical component features

Among various types of switches, there is a component with the ability to "sense" objects approaching it—the displacement sensor. Utilizing the sensitivity of the displacement sensor to approaching objects achieves the purpose of controlling the switch to open or close; this is a proximity switch. Only when an object moves toward the proximity switch and approaches within a certain distance does the displacement sensor "sense" it, causing the switch to actuate. This distance is usually called the "detection distance." Different proximity switches have different detection distances. Sometimes the detected object moves toward the proximity switch one by one at certain time intervals, and then leaves one by one, repeating continuously. Different proximity switches have different response capabilities to the detection object. This response characteristic is called the "response frequency."

WoHRLE electrical component classification

1. Classification by relay external dimensions: (1) miniature relay, (2) sub-miniature relay, (3) small miniature relay. 2. Classification by relay load: (1) micro-power relay, (2) weak-power relay, (3) medium-power relay, (4) high-power relay. 9. Classification by relay protection characteristics: (1) sealed relay: a relay with contacts and coils sealed inside a cover using welding or other methods, isolated from the surrounding medium, featuring a low leakage rate. (2) enclosed relay: a relay where contacts and coils are sealed (non-sealed) and protected by a housing. (3) open relay: a relay that does not use a protective cover to protect contacts and coils. Among the above relays, electromagnetic relays and reed relays are the most commonly used in electronic fabrication.

WoHRLE electrical component principle

When current flows through a conductor, the conductor heats up due to its inherent resistance. The heat generation follows this formula: Q=I2RT; where Q is the heat generated, 0.28 is a constant, I is the current flowing through the conductor, R is the resistance of the conductor, and T is the time the current flows through the conductor; from this formula, we can clearly understand the simple working principle of a fuse. Once the material and shape of the fuse are determined, its resistance R is relatively fixed (ignoring its temperature coefficient of resistance). When current flows through it, it generates heat, and the heat increases with time. The magnitude of current and resistance determines the rate of heat generation, while the construction of the fuse and its installation conditions determine the rate of heat dissipation. If the rate of heat generation is less than the rate of heat dissipation, the fuse will not blow. If the rate of heat generation equals the rate of heat dissipation, it will not blow for a considerable period. If the rate of heat generation exceeds the rate of heat dissipation, the accumulated heat increases. Due to its specific heat capacity and mass, this increase in heat manifests as a rise in temperature. When the temperature rises above the melting point of the fuse, the fuse blows. This is the working principle of a fuse. From this principle, we should understand that when designing and manufacturing fuses, you must carefully study the physical properties of the selected materials and ensure consistent geometric dimensions, as these factors play a crucial role in the proper functioning of the fuse. Similarly, when using it, you must install it correctly.

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