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Mitsubishi Electric electrical components are pyroelectric infrared sensors, devices constructed from thermocouples. They are widely used as temperature detection devices in fields such as ear thermometers, radiation thermometers, electric ovens, and food temperature monitoring. The entry details the basic unit of a thermopile—the thermocouple—and provides a detailed introduction to the structure, working principle, main parameters, and applications of thermopiles.

Mitsubishi Electric electrical components structure

Inductors are generally composed of bobbins, windings, shielding cans, encapsulation materials, magnetic cores, or iron cores. 1, Bobbin The bobbin refers to the support for winding coils. For some larger fixed inductors or adjustable inductors (such as oscillator coils, choke coils, etc.), enameled wire (or silk-covered wire) is mostly wound around the bobbin, and then magnetic cores, copper cores, or iron cores are inserted into the inner cavity of the bobbin to increase inductance. Bobbins are usually made of plastic, bakelite, or ceramic, and can be manufactured in different shapes according to actual needs. Small inductors (such as color-code inductors) generally do not use bobbins but instead wind enameled wire directly onto the magnetic core. Air-core inductors (also known as former-less coils or air coils, mostly used in high-frequency circuits) do not use magnetic cores, bobbins, or shielding cans; instead, they are wound on a mold which is then removed, leaving a certain distance between the coil turns. 2, Winding A winding refers to a set of coils with specified functions and is the basic component of an inductor. Windings are divided into single-layer and multi-layer types. Single-layer windings come in two forms: close-wound (where wires are wound turn by turn adjacent to each other) and spaced-wound (where a certain distance is maintained between each turn of wire); multi-layer windings include layered flat winding, random winding, honeycomb winding, and other methods. 3, Magnetic Core and Magnetic Rod Magnetic cores and magnetic rods are generally made of materials such as nickel-zinc ferrite or manganese-zinc ferrite, and come in various shapes such as "I" shape, cylindrical, cap-shaped, "E" shape, and pot core shape. 4, Iron Core Iron core materials mainly include silicon steel sheets and permalloy, and their shape is mostly "E" type. 5, Shielding Can To prevent the magnetic field generated by some inductors during operation from affecting the normal operation of other circuits and components, a metal shielding can is added (such as for oscillator coils in semiconductor radios). Using a shielding can increases coil loss, reducing the Q value. 15, Encapsulation Material Some inductors (such as color-code inductors, color-ring inductors, etc.) are sealed with encapsulation material after winding to enclose the coil and magnetic core. Encapsulation materials include plastic or epoxy resin.

Mitsubishi Electric electrical components principle

Generators convert mechanical energy into electrical energy, and dry cells convert chemical energy into electrical energy. Generators and batteries themselves are not charged; their two poles have positive and negative charges respectively, generating voltage (current is formed by the directional movement of charges under the action of voltage). Charges inherently exist in conductors; to generate current, only voltage needs to be applied. When conductors are connected to the two poles of a battery, positive and negative charges are released to generate current. When the charges are depleted, the charge is exhausted, and the current (voltage) disappears. Dry cells and the like are called power sources. A device that converts alternating current into direct current through transformers and rectifiers is called a rectified power supply. Electronic devices capable of providing signals are called signal sources. Crystal transistors can amplify incoming signals and transmit the amplified signals to subsequent circuits. For subsequent circuits, crystal transistors can also be regarded as signal sources. Rectified power supplies and signal sources are sometimes also referred to as power sources.

Mitsubishi Electric electrical components characteristics

Resolution refers to the ability of a sensor to detect the smallest change in the measured quantity. That is, if the input changes slowly from a non-zero value, the sensor's output will not change when the input change does not exceed a certain value, meaning the sensor cannot resolve this change in input. Only when the input change exceeds the resolution will the output change. Typically, the resolution at various points within the full-scale range of a sensor is not the same; therefore, the maximum change in input within the full scale that causes a step change in output is commonly used as the indicator for resolution. If the above indicator is expressed as a percentage of the full scale, it is called resolution. Resolution has a negative correlation with sensor stability.

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