DALEN electrical components Germany DALEN model DALEN price

DALEN electrical components are electrical control devices. When the change in the input quantity (excitation quantity) meets specified requirements, they cause a predetermined step change in the controlled quantity in the electrical output circuit. They have an interactive relationship between the control system (also known as the input circuit) and the controlled system (also known as the output circuit). Typically applied in automated control circuits, they effectively function as "automatic switches" that use small currents to control large current operations. Therefore, they play roles in automatic regulation, safety protection, and circuit switching in circuits. A relay is an electrical control device that can accept a specified input quantity and maintain it for a sufficient duration to cause a predetermined step change in the controlled quantity in the electrical output circuit. When the input quantity drops to a certain level and remains there for a sufficient duration, it returns to its initial state.

DALEN electrical component principle

Photoelectric sensors generally consist of 2 parts: processing channels and processing elements. Their basic principle is based on the photoelectric effect, converting changes in the measured quantity into changes in optical signals, and then using photoelectric elements to further convert non-electrical signals into electrical signals. The photoelectric effect refers to the phenomenon where light irradiating an object can be viewed as a series of photons with specific energy bombarding the object. At this time, photon energy is transferred to electrons, and the entire energy of one photon is absorbed by one electron at once. After gaining the energy transferred by the photon, the state of the electron changes, thereby generating corresponding electrical effects in the irradiated object. The photoelectric effect is usually divided into 9 categories: ① The phenomenon where electrons escape from the object's surface under light irradiation is called the external photoelectric effect, such as in phototubes and photomultiplier tubes; ② The phenomenon where the resistivity of an object changes under light irradiation is called the internal photoelectric effect, such as in photoresistors and phototransistors; ③ The phenomenon where an object generates electromotive force in a specific direction under light irradiation is called the photovoltaic effect, such as in photocells. Photoelectric detection methods offer advantages such as high precision, fast response, and non-contact operation. Moreover, they can measure many parameters, and the sensor structure is simple and flexible. Therefore, photoelectric sensors are widely used in detection and control. Photoelectric sensors are key components in various photoelectric detection systems for achieving photoelectric conversion; they are devices that convert optical signals (visible and ultraviolet laser light) into electrical signals. Photoelectric sensors use photoelectric devices as conversion elements. They can be used to detect non-electrical physical quantities that directly cause changes in light quantity, such as light intensity, illuminance, radiation temperature measurement, and gas composition analysis. They can also be used to detect other non-electrical quantities that can be converted into changes in light quantity, such as part diameter, surface roughness, strain, displacement, vibration, speed, acceleration, as well as object shape and working status recognition. Photoelectric sensors feature non-contact operation, fast response, and reliable performance, so they are widely used in industrial automation equipment and robots. New photoelectric devices continue to emerge, especially the advent of CCD image sensors, which has opened a new chapter for the further application of photoelectric sensors.

DALEN electrical component characteristics

Common types include RC phase-shifting bridge trigger circuits, unijunction transistor trigger circuits, bipolar junction transistor trigger circuits, and trigger circuits that use small thyristors to trigger large thyristors, among others. The main parameters of thyristors are: 1, rated on-state average current IT: the average value of the 50 Hz sinusoidal half-wave current that can continuously pass between the anode and cathode under specified conditions. 2, forward blocking peak voltage VPF: the forward peak voltage that can be repeatedly applied across the thyristor when the gate is open without a trigger signal and the anode forward voltage has not exceeded the conduction voltage. The forward peak voltage withstandable by the thyristor must not exceed this parameter value given in the manual. 3, reverse blocking peak voltage VPR: the reverse peak voltage that can be repeatedly applied across the thyristor when reverse voltage is applied and the thyristor is in the reverse blocking state. During use, this parameter value given in the manual must not be exceeded. 4, trigger voltage VGT: the minimum gate current and voltage required to switch the thyristor from the off state to the on state when a certain voltage is applied between the anode and cathode at a specified ambient temperature. 12, holding current IH: the minimum anode forward current required to maintain thyristor conduction at a specified temperature with the gate circuit open. Many new types of thyristor components have been introduced, such as fast thyristors suitable for high-frequency applications, bidirectional thyristors that can be controlled to conduct in both directions using positive or negative trigger signals, and thyristors that can be turned on by a positive trigger signal and turned off by a negative trigger signal.

DALEN electrical component functions

Multimeters can not only measure the resistance of objects, but also AC and DC voltages. Some multimeters can even measure the main parameters of transistors and the capacitance of capacitors. Proficient mastery of multimeter usage is one of the most basic skills in electronic technology. Common multimeters include analog multimeters and digital multimeters. Analog multimeters are multifunctional measuring instruments with a meter movement as the core component; measurement values are read from the pointer indication. Digital multimeters display measurement values directly as numbers on an LCD screen, making them easy to read; some also feature voice prompt functions. A multimeter is an instrument that integrates a voltmeter, ammeter, and ohmmeter sharing a single meter movement. The DC current range of a multimeter is a multi-range DC ammeter. Connecting shunt resistors in parallel with the meter movement expands its current range. The DC voltage range of a multimeter is a multi-range DC voltmeter. Connecting divider resistors in series with the meter movement expands its voltage range. Different divider resistors correspond to different ranges. The meter movement of a multimeter is a magnetoelectric measuring mechanism, which can only pass DC. Diodes are used to convert AC to DC, thereby enabling AC measurement.

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