Weitkowitz electrical components Germany Weitkowitz model Weitkowitz price

Weitkowitz electrical components are devices that convert electrical energy into mechanical energy. They utilize energized coils (i.e., stator windings) to generate a rotating magnetic field, which acts on the rotor (such as a squirrel-cage closed aluminum frame) to form electromagnetic rotational torque. Electric motors are classified into DC motors and AC motors based on the power supply used. Most motors in power systems are AC motors, which can be synchronous motors or asynchronous motors (where the speed of the stator magnetic field does not remain synchronized with the rotor rotation speed). An electric motor mainly consists of a stator and a rotor. The direction of motion of a current-carrying conductor in a magnetic field is related to the direction of the current and the direction of the magnetic field lines (magnetic field direction). The working principle of an electric motor is that the magnetic field exerts force on the current, causing the motor to rotate.

Weitkowitz electrical components function

A relay is an automatic switching component with isolation functionality, widely used in remote control, telemetry, communications, automatic control, mechatronics, and power electronic equipment, making it one of the most important control components. Relays generally have a sensing mechanism (input section) capable of responding to certain input variables (such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light, etc.); an actuating mechanism (output section) capable of implementing "on" and "off" control of the controlled circuit; and between the input and output sections of the relay, there is an intermediate mechanism (drive section) for coupling isolation of the input quantity, functional processing, and driving the output section. As a control component, relays generally have the following functions: (1) Expand control range: For example, when the control signal of a multi-contact relay reaches a certain value, it can simultaneously switch, disconnect, or connect multiple circuits according to different forms of contact groups. (2) Amplification: For example, sensitive relays and intermediate relays can use a very small control quantity to control high-power circuits. (3) Signal integration: For example, when multiple control signals are input into a multi-winding relay in a specified format, they are compared and integrated to achieve the predetermined control effect. (4) Automatic, remote control, and monitoring: For example, relays on automatic devices can form program control circuits together with other electrical appliances, thereby achieving automated operation.

Weitkowitz electrical components characteristics

Under normal circumstances, the actual static characteristic output of a sensor is a curve rather than a straight line. In practical work, to enable instruments to have uniformly scaled readings, a fitted straight line is often used to approximately represent the actual characteristic curve. Linearity (non-linear error) is a performance indicator of this degree of approximation. There are various methods for selecting the fitted straight line. For example, the theoretical straight line connecting the zero input and full-scale output points is used as the fitted straight line; or the theoretical straight line with the minimum sum of squared deviations from each point on the characteristic curve is used as the fitted straight line, which is called the least squares fitted straight line.

Weitkowitz electrical components classification

There are various classification methods for thyristors: (1) Classification by turn-off, conduction, and control methods: Thyristors can be divided into ordinary thyristors, bidirectional thyristors, reverse-conducting thyristors, gate turn-off thyristors, BTG thyristors, temperature-controlled thyristors, and light-controlled thyristors, among others. (2) Classification by pins and polarity: Thyristors can be divided into two-terminal thyristors, three-terminal thyristors, and four-terminal thyristors based on their pins and polarity. (3) Classification by package type: Thyristors can be divided into three types based on their package type: metal-packaged thyristors, plastic-packaged thyristors, and ceramic-packaged thyristors. Among these, metal-packaged thyristors are further divided into bolt-type, flat-type, and round-case types, among others; plastic-packaged thyristors are divided into two types: with heat sink and without heat sink. (4) Classification by current capacity: Thyristors can be divided into three types based on current capacity: high-power thyristors, medium-power thyristors, and low-power thyristors. Typically, high-power thyristors mostly use metal shell packaging, while medium and low-power thyristors mostly use plastic or ceramic packaging. (5) Classification by turn-off speed: Thyristors can be divided into ordinary thyristors and high-frequency (fast) thyristors based on their turn-off speed. (6) Zero-crossing triggering - generally for power regulation, i.e., triggering occurs when the phase of the sinusoidal AC voltage crosses the zero point; triggering must occur at the zero crossing to conduct the thyristor. (7) Non-zero-crossing triggering - the thyristor can be triggered to conduct regardless of the phase of the AC voltage. Commonly, this is phase-shift triggering, i.e., changing the output percentage by altering the conduction angle (phase angle) of the sinusoidal AC current.

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