aavid thermalloy electrical components Germany aavid thermalloy models aavid thermalloy prices

aavid thermalloy electrical components utilize the high conductivity and fluidity of mercury to control the opening and closing of electrical circuits. They consist of a glass tube, mercury, fixed electrodes, lead wires, and other parts. After evacuating the air from the tube, it is filled with various gases and sealed. These components are suitable for environments with dust, oil, water vapor, and corrosive gases, and can also serve as explosion-proof switches in areas with explosive gases. Given the high surface tension and specific gravity of the mercury inside the tube, along with its fluidity, even a slight tilt of the glass tube causes the mercury's position to change immediately, making surface contact with the electrodes. Thus, they can be used to switch large AC and DC currents. Additionally, such switches feature a service life of several million cycles at rated current, compact size, high sensitivity, no mechanical noise, and low cost, making them widely used as automatic control switches.

aavid thermalloy electrical component classification

Circuit breakers are classified by number of poles: single-pole, two-pole, three-pole, and four-pole; and by installation method: plug-in, fixed, and draw-out types.

aavid thermalloy electrical component functions

The main functions of potentiometers in circuits include: 1. As voltage dividers: A potentiometer is a continuously adjustable resistor. When adjusting the knob or slider, the movable contact slides on the resistive element. At this time, the output terminal of the potentiometer provides an output voltage related to the applied voltage and the angle or travel of the movable arm. 2. As rheostats: When used as a rheostat, the potentiometer should be connected as a two-terminal device, allowing a smoothly and continuously changing resistance value within its travel range. 12. As current controllers: When a potentiometer is used as a current controller, one of the selected current output terminals must be the terminal connected to the sliding contact.

aavid thermalloy electrical component applications

The primary application of rectifiers is to convert AC power to DC power. Since all electronic devices require DC power, but utility power supply is AC, rectifiers are indispensable inside the power supplies of all electronic devices unless batteries are used. Converting DC voltage levels is more complex. One method of DC-DC conversion first converts the power to AC (using a device called an inverter), then uses a transformer to change the AC voltage, and finally rectifies it back to DC. Rectifiers are also used for demodulation of AM radio signals. The signal may be amplified (increasing the signal amplitude) before demodulation; if not amplified, diodes with very low voltage drop must be used. Careful matching of capacitors and load resistors is required when using rectifiers for demodulation. If the capacitance is too small, excessive high-frequency components will pass through; if too large, the signal will be suppressed. Rectifier units are also used to provide fixed-polarity voltage required for electric welding. Sometimes the output current of such circuits needs to be controlled; in these cases, thyristors (a type of silicon-controlled rectifier) replace the diodes in bridge rectifiers, and their voltage output is adjusted via phase-control triggering. Thyristors are also used in railway locomotive systems at various levels to achieve fine adjustment of traction motors.

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