franke electrical components Germany franke model franke price

franke electrical component is a sensor that converts the state of the measured object into a measurable optical signal. The working principle of a fiber optic sensor is to guide the light beam from the light source via an optical fiber into a modulator, where it interacts with external measured parameters, causing changes in the optical properties of the light such as intensity, wavelength, frequency, phase, and polarization state, thereby becoming a modulated optical signal. This signal is then transmitted via the optical fiber to a photodetector and demodulator to obtain the measured parameters. Throughout this process, the light beam is introduced via the optical fiber, passes through the modulator, and is then emitted; the role of the optical fiber is first to transmit the light beam, and second to act as an optical modulator.

franke electrical component characteristics

Common types include RC phase-shifting bridge trigger circuits, unijunction transistor trigger circuits, bipolar junction transistor trigger circuits, and trigger circuits using small thyristors to trigger large thyristors, etc. The main parameters of thyristors are: 1, rated on-state average current IT Under certain conditions, the average value of the 50 Hz sinusoidal half-wave current that can continuously pass between the anode and cathode. 2, forward blocking peak voltage VPF When the gate is open and no trigger signal is applied, and the forward anode voltage has not exceeded the conduction voltage, this is the forward peak voltage that can be repeatedly applied across the thyristor. The forward peak voltage withstand by the thyristor must not exceed this parameter value given in the manual. 3, reverse blocking peak voltage VPR When a reverse voltage is applied to the thyristor and it is in the reverse off-state, this is the reverse peak voltage that can be repeatedly applied across the thyristor. During use, this parameter value given in the manual must not be exceeded. 4, trigger voltage VGT At a specified ambient temperature, when a certain voltage is applied between the anode and cathode, this is the minimum gate current and voltage required for the thyristor to switch from the off-state to the on-state. 15, holding current IH At a specified temperature, with the gate circuit open, this is the minimum anode forward current required to maintain the thyristor in the on-state. Many new types of thyristor components have been introduced, such as fast thyristors suitable for high-frequency applications, bidirectional thyristors that can be controlled to conduct in both directions using positive or negative trigger signals, and thyristors that can be turned on by a positive trigger signal and turned off by a negative trigger signal, etc.

franke electrical component applications

Basic circuits of analog integrated circuits include current sources, single-stage amplifiers, filters, feedback circuits, and current mirror circuits. Higher-level basic circuits composed of these include operational amplifiers and comparators, while even higher-level circuits include switched-capacitor circuits, phase-locked loops, and ADC/DAC. Based on the response relationship between output and input signals, analog integrated circuits can be divided into two major categories: linear integrated circuits and nonlinear integrated circuits. The response between the output and input signals of the former is usually linear; the shape of the output signal is similar to that of the input signal, only amplified by a fixed coefficient. In contrast, the response of the output signal to the input signal in nonlinear integrated circuits exhibits a nonlinear relationship, such as square or logarithmic relationships, hence they are called nonlinear circuits. Common nonlinear circuits include oscillators, timers, and phase-locked loop circuits. Typical applications of analog integrated circuits are shown in the figure below. External natural signals collected by various sensors or antennas, such as temperature, humidity, optical, piezoelectric, and acoustic sensors, are preprocessed by analog circuits and converted into suitable digital signals for input into digital systems. Signals processed by the digital system are then post-processed by analog circuits and converted into analog signals such as sound, images, and radio waves for output.

franke electrical component principle

The alternating current generated by the automotive alternator is rectified into direct current by the rectifier, but its waveform still has irregular fluctuations, which directly affects the accuracy of vehicle ignition; the output voltage cannot remain relatively constant, causing differences in the energy of each spark plug ignition, which can easily cause engine vibration, gear shift jerk, slow and weak acceleration, unstable idle speed, and low efficiency of the car air conditioner. This greatly reduces the performance and service life of onboard electrical equipment; coupled with the aging of the circuit system in older vehicles and the increased circuit resistance, the impact on the vehicle becomes increasingly apparent. The role of the electronic rectifier is to help eliminate noise interference in the vehicle, stabilize the output voltage, improve the instantaneous discharge capability of the power system, increase torque output, accelerate throttle response, extend battery service life, shorten engine start time, and improve ignition efficiency, especially for small-displacement vehicles, where the effect is more pronounced. The semiconductor PN junction has a large current under forward bias and a small current under reverse bias. A rectifier diode is a PN junction diode that utilizes this unidirectional conductivity characteristic of the PN junction to convert alternating current into direct current. Devices with a current capacity below 1 amperes are typically called rectifier diodes, while those above 8 amperes are called rectifiers. Common semiconductor rectifiers include silicon rectifiers and selenium rectifiers, with many product specifications ranging from tens to thousands of volts in voltage and from a few to thousands of amperes in current. Rectifiers are widely used in various forms of rectified power supplies. High-power rectified power supplies require rectifiers with large current capacity, high breakdown voltage, and good heat dissipation performance. However, such devices have large junction areas and large junction capacitance, resulting in very low operating frequencies, generally below tens of kilohertz. Silicon material has a larger bandgap width and good thermal conductivity, making it suitable for manufacturing high-power rectifier devices. High-voltage silicon stacks are often used in high-voltage rectification devices; they consist of multiple rectifier device cores connected in series, and their reverse withstand voltage is determined by the withstand voltage of the cores and the number of series-connected cores, with maximum withstand voltages reaching hundreds of kilovolts. If a high-frequency rectifier circuit is used at very high frequencies, when the period of the AC voltage is comparable to the recovery time from the on-state to the off-state of the rectifier, the rectifier no longer performs rectification on the high-frequency voltage. To meet the needs of high-frequency operation, gold doping is usually employed in silicon rectifiers to shorten the lifetime of injected minority carriers, thereby reducing the recovery time. To reduce the possibility of damage due to overvoltage breakdown and improve the reliability of the rectification device, silicon avalanche rectifiers can be used. In such devices, when the reverse voltage exceeds the allowable peak value, uniform avalanche breakdown occurs across the entire PN junction, allowing the device to operate under high voltage and large current, thus withstanding considerable reverse surge power. Manufacturing such devices requires materials with few defects, uniform resistivity, and flat junction surfaces; the exposed junction areas should also be properly protected to avoid surface breakdown. Selenium rectifiers have high overload capacity and strong ability to withstand reverse surge power. In the two basic types of rectifiers based on high-power diodes or thyristors, the high-voltage AC power from the grid is converted into DC power by the rectifier.

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