luetze electrical components Germany luetze model luetze price

luetze electrical components are instruments that measure by converting high primary current to low secondary current based on the principle of electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current needs to be measured. Therefore, the full current of the line often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the coils connected in series in the measuring instrument and protection circuits is very small, and the operating state of the current transformer is close to a short circuit. The current transformer converts high primary current to low secondary current for measurement; the secondary side must not be open-circuited. The principle of the current transformer is based on electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current needs to be measured, so the full current of the line often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the coils connected in series in the measuring instrument and protection circuits is very small, and the operating state of the current transformer is close to a short circuit.

luetze electrical component applications

Photoelectric sensors using photoelectric elements as sensitive components come in many types and have wide applications. According to the nature of the output of photoelectric sensors, they can be divided into two categories: (1) Photoelectric measuring instruments that convert the measured quantity into a continuously changing photocurrent, which can be used to measure physical quantities such as light intensity, object temperature, light transmittance, displacement, and surface condition. For example: illuminance meters for measuring light intensity, photoelectric pyrometers, photoelectric colorimeters and turbidimeters, photoelectric alarms for fire prevention, and automatic inspection devices and instruments for checking the diameter, length, ellipticity, and surface roughness of processed parts, all of which use photoelectric elements as sensitive components. Semiconductor photoelectric elements are not only widely used in civil industrial fields but also hold an important position in military applications. For example, lead sulfide photoresistors can be used to make infrared night vision devices, infrared cameras, and infrared navigation systems; (5) Converting the measured quantity into a continuously changing photocurrent. Various photoelectric automatic devices are made using the characteristic of photoelectric elements to output "yes" or "no" electrical signals when exposed to light or no light. Photoelectric elements are used as switching photoelectric conversion elements. For example, photoelectric input devices for electronic computers, switching temperature regulation devices, and digital photoelectric tachometers for speed measurement.

luetze electrical component classification

For most conductors, at a certain temperature, their resistance remains almost constant at a fixed value; this type of resistance is called linear resistance. The resistance of some materials changes significantly with current (or voltage), and their volt-ampere characteristic is a curve; this type of resistance is called nonlinear resistance. For a nonlinear resistor under a given voltage (or current), the ratio of voltage to current is the static resistance at that operating point, and the slope of the volt-ampere characteristic curve is the dynamic resistance. The expression of nonlinear resistance characteristics is relatively complex, but these nonlinear relationships are widely applied in electronic circuits.

luetze electrical component principles

Optical measurement and control systems manufactured based on different principles of the effect of luminous flux on photoelectric elements are diverse. According to the nature of the output of photoelectric elements (optical measurement and control systems), they can be divided into two categories: analog photoelectric sensors and pulse (switching) photoelectric sensors. Analog photoelectric sensors convert the measured quantity into a continuously changing photocurrent, showing a single-value relationship with the measured quantity. Analog photoelectric sensors can be divided into three major categories based on the method of measuring the target object: transmission (absorption) type, diffuse reflection type, and shading (beam blocking) type. The so-called transmission type means that the measured object is placed in the optical path, and the light energy emitted by a constant light source passes through the measured object, with part being absorbed, and the transmitted light is projected onto the photoelectric element; the so-called diffuse reflection type means that the light emitted by a constant light source is projected onto the measured object, and then reflected from the surface of the measured object onto the photoelectric element; the so-called shading type means that when the luminous flux emitted by the light source is partially blocked by the measured object, the luminous flux projected onto the photoelectric element changes, and the degree of change is related to the position of the measured object in the optical path. Photodiodes are the most common light sensors. The appearance of a photodiode is the same as that of a general diode. When there is no light, it is like a ordinary diode, with very small reverse current, called the dark current of the photodiode; when there is light, carriers are excited to generate electron-hole pairs, called photoelectric carriers. Under the action of an external electric field, photoelectric carriers participate in conduction, forming a reverse current much larger than the dark current, which is called photocurrent. The magnitude of the photocurrent is proportional to the light intensity, so an electrical signal that changes with light intensity can be obtained across the load resistor.

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