tehalit electrical components Germany tehalit model tehalit price

tehalit 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 essentially function as "automatic switches" that use small currents to control the operation of large currents. Therefore, they play roles in automatic regulation, safety protection, and circuit switching in circuits. A relay is an electrical control device that, upon receiving a specified input quantity maintained for a sufficient duration, causes 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.

tehalit electrical component characteristics

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

tehalit electrical component classification

Based on the working power supply of the motor, motors can be divided into DC motors and AC motors. Among these, AC motors are further divided into single-phase motors and three-phase motors. Motors can be classified by structure and operating principle into DC motors, asynchronous motors, and synchronous motors. Synchronous motors can be further divided into permanent magnet synchronous motors, reluctance synchronous motors, and hysteresis synchronous motors. Asynchronous motors can be divided into induction motors and AC commutator motors. Induction motors include three-phase asynchronous motors, single-phase asynchronous motors, and shaded-pole asynchronous motors. AC commutator motors include single-phase series-wound motors, universal motors (AC/DC), and repulsion motors. Based on starting and running methods, motors can be classified into capacitor-start single-phase asynchronous motors, capacitor-run single-phase asynchronous motors, capacitor-start-run single-phase asynchronous motors, and split-phase single-phase asynchronous motors. Based on application, motors are divided into drive motors and control motors. Drive motors include motors for power tools, household appliances, and other general small mechanical equipment. Control motors include stepper motors and servo motors. Based on rotor structure, motors are classified into squirrel-cage induction motors and wound-rotor induction motors. Based on operating speed, motors are classified into high-speed motors, low-speed motors, constant-speed motors, and variable-speed motors.

tehalit electrical component structure

The commonly used type is the unidirectional thyristor, also known as the conventional thyristor. It consists of four layers of semiconductor material and has three PN junctions, with three external electrodes: the electrode drawn from the first layer of P-type semiconductor is called the anode A; the electrode drawn from the third layer of P-type semiconductor is called the gate G; and the electrode drawn from the fourth layer of N-type semiconductor is called the cathode K. As seen from the circuit symbol of the thyristor, it is a unidirectional conductive device like a diode, but with the addition of a gate G, giving it operating characteristics completely different from those of a diode. The P1N1P2N2 four-layer, three-terminal device, based on silicon monocrystal, is internationally known as the silicon controlled rectifier because its characteristics resemble those of a vacuum thyratron. It is abbreviated as thyristor T. Since thyristors were initially used in static rectification, they are also called silicon controlled rectifiers, abbreviated as SCR SCR. In terms of performance, SCRs not only possess unidirectional conductivity but also offer controllability more valuable than that of silicon rectifier elements (commonly known as "dead silicon"). They have only two states: conduction and blocking. SCRs can control high-power electromechanical equipment with milliampere-level currents. If this power is exceeded, switching losses increase significantly, reducing the allowable average current; in such cases, the nominal current should be derated. SCRs have many advantages, such as controlling high power with low power (with power amplification factors up to hundreds of thousands), extremely fast response (turn-on and turn-off in microseconds), contactless operation (spark-free and noise-free), high efficiency, and low cost. Weaknesses of SCRs include poor static and dynamic overload capacity and susceptibility to interference causing false triggering. SCRs are mainly classified by appearance into bolt-type, flat-type, and flat-base types. Structure of SCR components: Regardless of the external shape, the chip consists of a four-layer P1N1P2N2 structure composed of P-type silicon and N-type silicon. It has three PN junctions (J1, J2, J3). The anode A is drawn from the P1 layer of the J1 structure, the cathode K is drawn from the N2 layer, and the gate G is drawn from the P3 layer, making it a four-layer, three-terminal semiconductor device.

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