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BMR GmbH electrical components are devices that use the principle of electromagnetic induction to change AC voltage. The main components are the primary winding, secondary winding, and iron core (magnetic core). Main functions include: voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization (magnetic saturation transformers). 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, furnace transformers, rectifier transformers, reactors, anti-interference transformers, lightning protection transformers, box-type substation test transformers, corner transformers, high-current transformers, excitation transformers, etc.

BMR GmbH electrical component applications

Thermistors can also be used as electronic circuit components for temperature compensation in instrument circuits and cold junction temperature compensation for thermocouples. Utilizing the self-heating characteristics of NTC thermistors enables automatic gain control, forming RC oscillator amplitude stabilization circuits, delay circuits, and protection circuits. When the self-heating temperature is much higher than the ambient temperature, the resistance value is also related to the heat dissipation conditions of the environment. Therefore, this characteristic of thermistors is often utilized in anemometers, flow meters, gas analyzers, and thermal conductivity analysis to create specialized detection elements. PTC thermistors are mainly used for overheat protection of electrical equipment, contactless relays, constant temperature control, automatic gain control, motor starting, time delay, automatic degaussing of color TVs, fire alarms, and temperature compensation. Main disadvantages: (1) the relationship between resistance and temperature is highly nonlinear; (2) poor consistency and interchangeability of components; (3) components are prone to aging and have poor stability; (4) except for special high-temperature thermistors, most thermistors are only suitable for the 0～156℃ range, which must be noted during use.

BMR GmbH electrical component principles

P-type semiconductors are formed by doping intrinsic semiconductors (a completely pure, structurally complete semiconductor crystal) with a small amount of trivalent impurity elements, such as boron. Since boron atoms have only three valence electrons, they form covalent bonds with surrounding silicon atoms. Due to the lack of one electron, a vacancy is created in the crystal. When electrons on adjacent covalent bonds gain energy, they may fill this vacancy, turning the boron atom into an immobile negative ion, while the covalent bond of the original silicon atom forms a hole due to the missing electron. However, the entire semiconductor remains neutral. In this type of P semiconductor, conduction is primarily via holes, which are the majority carriers, while free electrons are the minority carriers. The principle of formation for N-type semiconductors is similar to that of P-type. Pentavalent atoms, such as phosphorus, are doped into the intrinsic semiconductor. After doping, they form covalent bonds with silicon atoms, generating free electrons. In N-type semiconductors, electrons are the majority carriers, and holes are the minority carriers. Therefore, doping trivalent and pentavalent impurity elements into two different regions of an intrinsic semiconductor forms P-type and N-type regions. Based on the characteristics of N-type and P-type semiconductors, it is known that a concentration difference of electrons and holes appears at their junction. Both electrons and holes diffuse from areas of high concentration to areas of low concentration. This diffusion disrupts the electrical neutrality at the original junction. Unidirectional conductivity of the PN junction: When a forward voltage V is applied across the PN junction, the equilibrium state of the PN junction is broken under the influence of this external electric field. Holes in the P region and electrons in the N region both move towards the PN junction. Holes neutralize negative ions in the P region of the PN junction, and electrons neutralize positive ions in the N region of the PN junction, thereby narrowing the PN junction. As the external electric field increases, diffusion motion is further enhanced, and drift motion is weakened. When the external voltage exceeds the threshold voltage, the PN junction acts as a resistor with very low resistance, meaning the PN junction is conducting.

BMR GmbH electrical component principles

The working principle of a discharge tube is gas gap discharge i. When a certain voltage is applied between the two poles of the discharge tube, a non-uniform electric field is generated between the poles. Under the action of this electric field, the gas inside the tube begins to ionize. When the external voltage increases to the point where the field strength between the poles exceeds the insulation strength of the gas, the gap between the two poles breaks down and discharges, transforming from an insulating state to a conductive state. After conduction, the voltage between the two poles of the discharge tube is maintained at the residual voltage level determined by the discharge arc channel. This residual voltage is generally very low, thereby protecting electronic equipment connected in parallel with the discharge tube from damage due to overvoltage.

Weidou Intelligent Technology specializes in selling German BMR GmbH connectors, BMR GmbH switches, BMR GmbH relays, BMR GmbH controllers, BMR GmbH plugs, BMR GmbH sensors, BMR GmbH resistors, BMR GmbH capacitors, BMR GmbH buses, BMR GmbH modules, BMR GmbH cables, BMR GmbH power supplies, BMR GmbH interfaces, BMR GmbH gateways, and BMR GmbH circuit breakers. BMR GmbH products are original imports from Germany. We welcome inquiries and orders from users.