103013500 in stock German 103013500 electrical components 103013500 inventory

103013500 electrical components consist of wire wound turn by turn around an insulating tube. The wires are mutually insulated, and the insulating tube can be hollow or contain an iron core or magnetic powder core. Inductor coils are devices that operate 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 produced by the wire itself generates 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 inductor coils are opposite to those of capacitors: "passing low frequencies and blocking high frequencies." High-frequency signals encounter significant resistance when passing through an inductor coil and struggle 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 nearly zero. Resistance, capacitance, and inductance all present certain resistance to the flow of electrical signals in a circuit, which we call "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.

103013500 Electrical Component Applications

The most basic application of a standard thyristor is controlled rectification. The familiar diode rectifier circuit belongs to uncontrolled rectification circuits. If diodes are replaced with thyristors, a controlled rectification circuit can be formed. Taking the simplest single-phase half-wave controlled rectification circuit as an example, during the positive half-cycle of the sinusoidal AC voltage U2, if the gate of VS receives no trigger pulse Ug, VS will not conduct. It only conducts when U2 is in the positive half-cycle and a trigger pulse Ug is applied to the gate. Its waveforms (c) and (d) show that voltage UL appears across the load RL only when the trigger pulse Ug arrives. If Ug arrives early, the thyristor conducts earlier; if Ug arrives late, the thyristor conducts later. By changing the arrival time of the trigger pulse Ug at the gate, the average value UL of the output voltage across the load can be adjusted. In electrical engineering, half a cycle of AC is often defined as 180°, called the electrical angle. Thus, in each positive half-cycle of U2, the electrical angle experienced from the zero value to the instant the trigger pulse arrives is called the control angle α; the electrical angle during which the thyristor conducts in each positive half-cycle is called the conduction angle θ. Clearly, α and θ are used to indicate the conduction or blocking range of the thyristor during the half-cycle where it withstands forward voltage. By changing the control angle α or conduction angle θ, the average value UL of the pulsed DC voltage across the load is changed, achieving controlled rectification. Low-power plastic-sealed bidirectional triacs are typically used in sound and light-controlled lighting systems. Rated current is less than 10A. Large and medium-power plastic-sealed and metal-sealed thyristors are typically used in power-type controlled voltage regulation circuits, such as adjustable-output DC power supplies. High-power high-frequency thyristors are typically used in industrial applications, such as high-frequency melting furnaces.

103013500 Electrical Component Classification

1. Classification by relay physical dimensions: ① Micro relays, ② Ultra-subminiature relays, ③ Subminiature relays. 2. Classification by relay load: ① Micropower relays, ② Weak-power relays, ③ Medium-power relays, ④ High-power relays. 9. Classification by relay protection features: ① Sealed relays: Relays where contacts and coils are sealed inside a cover using welding or other methods, isolated from the surrounding medium, resulting in a low leakage rate. ② Enclosed relays: Relays where contacts and coils are protected by being enclosed (non-sealed) in a housing. ③ Open relays: Relays that do not use a protective cover for contacts and coils. Among the above, electromagnetic relays and reed relays are the most commonly used in electronic fabrication.

103013500 Electrical Component Principles

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 easily 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 over 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, heat accumulates. Due to its specific heat capacity and mass, this heat accumulation 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, it is evident that when designing and manufacturing fuses, you must carefully study the physical properties of your selected materials and ensure consistent geometric dimensions, as these factors play a crucial role in the proper functioning of the fuse. Similarly, correct installation is essential during use.

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