murrelektronik electrical components Germany murrelektronik model murrelektronik price

murrelektronik electrical components are components of electronic components and small machines and instruments. They themselves often consist of several parts and can be used interchangeably in similar products; they often refer to certain parts in the electrical, radio, and instrumentation industries, and are a general term for electronic devices such as capacitors, transistors, hairsprings, and mainsprings. Common examples include diodes. Electronic components include: resistors, capacitors, inductors, potentiometers, electron tubes, heat sinks, electromechanical components, connectors, semiconductor discrete devices, electroacoustic devices, laser devices, electronic display devices, optoelectronic devices, sensors, power supplies, switches, micro special motors, electronic transformers, relays, printed circuit boards, integrated circuits, various circuits, piezoelectric, crystals, quartz, ceramic magnetic materials, substrate boards for printed circuits, special materials for electronic functional processes, electronic adhesive (tape) products, electronic chemical materials and parts, etc.

murrelektronik electrical component structure

1. The cathode of an electron tube is the component used to emit electrons, divided into oxide cathodes and thoriated tungsten carbide cathodes. Generally, oxide cathodes are indirectly heated; they use a dedicated filament to heat the cathode body coated with barium oxide, etc., for thermionic emission. Thoriated tungsten carbide cathodes are generally directly heated; thermionic emission is produced by heating, so it serves as both the filament and the cathode. Theoretically, thoriated tungsten carbide cathodes have a much longer lifespan than oxide cathodes. Thoriated tungsten carbide cathodes are most widely used in high-power transmitting tubes, while oxide cathodes are generally used in transmitting tubes with an output power of 1kW or less. Mesh cathodes are made into a cylindrical shape using thinner thoriated tungsten wires. Their advantages are: (1) Since they are woven from many thoriated tungsten wires, the permeance is relatively large. (2) It is easy to achieve a smaller cathode-grid spacing, which helps improve transconductance. (3) Since the filament has a mesh structure, the current in each individual filament is small, the local magnetic field is weak, and thus the hum generated by the cathode current is also small. 2. The grids of an electron tube are divided into first grid and second grid according to their different roles in the tube, sometimes also called control grid and screen grid. The main role of the first grid is to control the cathode current, and the role of the second grid is to shield the influence of the plate on the first grid. The grid structure relates to its own mechanical strength and heat dissipation effect, and relates to whether the tube can work stably. To reduce the electron transit time, the grid-cathode spacing is made very short, even less than 1mm, so manufacturers mostly use materials with high mechanical strength, high thermal conductivity, good radiation coefficient, and high melting point to make the grids, to avoid thermal short-circuiting at very small spacings. The first grid and second grid should be strictly aligned, so that the screen grid intercepts fewer electrons, reducing screen grid dissipation, improving current distribution and linearity. 12. The anode of an electron tube is the electrode that collects most of the electrons emitted by the cathode. When the electron tube is working, due to electron bombardment of the plate surface and thermal radiation from other electrodes, a large amount of heat energy is generated at the plate. Because the plate dissipation power density is tens to hundreds of watts per square centimeter, natural radiation or conduction cooling is no longer sufficient for such high power density. Therefore, forced cooling methods must be used. Common methods include air cooling, water cooling, and evaporative cooling.

murrelektronik electrical component function

Control high power, capable of controlling hundreds of kilowatts of power. Using power transistors as switches has many advantages, mainly easy turn-off and few required auxiliary components. Fast switching allows operation at high frequencies. Transistor compound (Darlington) and parallel connections are effective methods to increase transistor switching capability. In such high-power circuits, the main problem is wiring. Very high switching speeds can generate considerable interference voltage on very short connection lines. High performance achieved through simple and optimized base drive. The base drive circuit not only drives the power transistor but also protects it, referred to as "decentralized protection" (in contrast to centralized protection). Functions of integrated drive circuits include: turning on and off the power switch, monitoring auxiliary supply voltage, limiting maximum and minimum pulse width, thermal protection, and monitoring the switch's saturation voltage drop.

murrelektronik electrical component classification

1. Classification by relay outline dimensions: (1) miniature relay, (2) sub-miniature relay, (3) small miniature relay. 2. Classification by relay load: (1) micro power relay, (2) low power relay, (3) medium power relay, (4) high power relay. 11. Classification by relay protection characteristics: (1) Sealed relay: A relay with contacts and coils, etc., sealed inside a cover by welding or other methods, isolated from the surrounding medium, having a low leakage rate. (2) Enclosed relay: A relay protected by sealing (non-hermetic) contacts and coils, etc., with a housing. (3) Open relay: A relay that does not use a protective cover to protect contacts and coils, etc. Among the above relays, electromagnetic relays and reed relays are the most commonly used in electronic fabrication.

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