JEANMLLER electrical components Germany JEANMLLER model JEANMLLER price

JEANMLLER electrical components are devices that change AC voltage using the principle of electromagnetic induction. The main components are the primary coil, secondary coil, and iron core (magnetic core). Main functions include: voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization (magnetic saturation transformer). Transformers can be classified by application into: distribution transformers, power transformers, fully sealed transformers, combined transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric furnace transformers, rectifier transformers, reactors, anti-interference transformers, lightning protection transformers, box-type substation test transformers, phase-shifting transformers, high-current transformers, excitation transformers, etc.

JEANMLLER electrical component characteristics

Dynamic characteristics refer to the output characteristics of a sensor when the input changes. In practical work, the dynamic characteristics of a sensor are often expressed by its response to certain standard input signals. This is because the sensor's response to standard input signals is easy to obtain through experimental methods, and there is a certain relationship between its response to standard input signals and its response to arbitrary input signals; often, knowing the former allows inference of the latter. The most commonly used standard input signals are step signals and sinusoidal signals, so the dynamic characteristics of sensors are also commonly expressed by step response and frequency response.

JEANMLLER electrical component principles

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 further converting non-electrical signals into electrical signals with the help of photoelectric elements. The photoelectric effect refers to the phenomenon where light irradiating an object can be viewed as a stream 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, causing the corresponding electrical effect in the illuminated object. The photoelectric effect is usually divided into 7 categories: ① The phenomenon where electrons overflow the surface of an object under light action 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 action is called the internal photoelectric effect, such as in photoresistors and phototransistors; ③ The phenomenon where an object generates an electromotive force in a certain direction under light action is called the photovoltaic effect, such as in photocells. Photoelectric detection methods have advantages such as high precision, fast response, and non-contact operation, and can measure many parameters. The sensor structure is simple and flexible in form, so photoelectric sensors are widely used in detection and control. Photoelectric sensors are key components for achieving photoelectric conversion in various photoelectric detection systems; 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, gas composition analysis, etc.; 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 have characteristics such as non-contact operation, fast response, and reliable performance, so they are widely used in industrial automation devices and robots. New photoelectric devices continue to emerge, especially the birth of CCD image sensors, which has opened a new chapter for the further application of photoelectric sensors.

JEANMLLER electrical component types

In different application scenarios, the purpose of applying varistors, and the voltage/current acting on the varistor, are not the same, so the requirements for varistors are also different. Paying attention to distinguishing these differences is very important for correct use. According to different purposes, varistors can be divided into two major categories: ① protective varistors, ② circuit function varistors. Protective resistors: (1) Distinguish whether it is a varistor for power supply protection or for signal line/data line protection, as they must meet different technical standard requirements. (2) According to the different continuous operating voltages applied to the varistor, varistors across power lines can be divided into two types: AC type or DC type. The aging characteristics of varistors under these two voltage stresses are different. (3) According to the different abnormal overvoltage characteristics withstand by the varistor, varistors can be divided into three types: surge suppression type, high-power type, and high-energy type. 1. Surge suppression type varistors refer to varistors used to suppress transient overvoltages such as lightning overvoltage and switching overvoltage. The occurrence of this transient overvoltage is random and non-periodic, and the peak current and voltage may be very high. The vast majority of varistors belong to this category. 2. High-power type varistors refer to varistors used to absorb continuous pulse groups that appear periodically, such as varistors connected in parallel to switching power supply converters. Here, the impulse voltage appears periodically, and the period is known. The energy value can generally be calculated. The voltage peak is not large, but due to the high frequency of occurrence, the average power is quite large. 9. High-energy type varistors refer to varistors used to absorb magnetic energy in large inductive coils such as generator excitation coils and lifting electromagnet coils. For such applications, the main technical indicator is energy absorption capacity. The protective function of varistors can act repeatedly in most application scenarios, but sometimes they are made into "one-time" protective devices like current fuses. For example, varistors with short-circuit contacts connected in parallel to the loads of certain current transformers.

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