kenwood electrical components German kenwood models kenwood prices

kenwood electrical components are devices for detachable (active) connection between optical fibers. They precisely align the end faces of two optical fibers to maximize the coupling of light energy from the transmitting fiber into the receiving fiber, while minimizing the impact on the system due to their insertion into the optical link. This is the basic requirement for fiber optic connectors. To a certain extent, fiber optic connectors affect the reliability and various performance metrics of optical transmission systems.

kenwood electrical component structure

The main purpose of fiber optic connectors is to achieve fiber splicing. Fiber optic connectors, which are widely used in fiber optic communication systems, come in many types with different structures. However, upon closer examination, the basic structure of various types of fiber optic connectors is consistent. That is, the vast majority of fiber optic connectors generally use high-precision components (consisting of two ferrules and one coupling sleeve, making three parts in total) to achieve aligned connection of the fibers. This method involves inserting and fixing the fiber into the ferrule, polishing the surface of the ferrule, and achieving alignment within the coupling sleeve. The external components of the ferrule are made of metal or non-metallic materials. The mating end of the ferrule must be ground, while the other end typically uses a strain relief component to support the fiber or fiber optic cable to release stress. The coupling sleeve is generally made of two halves synthesized into a tight cylindrical component from materials such as ceramic or bronze, often equipped with metal or plastic flanges to facilitate the installation and fixation of the connector. To align the optical fibers as precisely as possible, the machining precision of the ferrule and coupling sleeve is required to be very high.

kenwood electrical component classification

a. By material: silicon transistors, germanium transistors. b. By structure: NPN, PNP. c. By function: switching transistors, power transistors, Darlington transistors, phototransistors, etc. d. By power: low-power transistors, medium-power transistors, high-power transistors. e. By operating frequency: low-frequency transistors, high-frequency transistors, ultra-high-frequency transistors. f. By structural process: alloy transistors, planar transistors. g. By mounting method: through-hole transistors, surface-mount transistors.

kenwood electrical component types

For different application scenarios, the purpose of applying varistors varies; the voltage/current applied to the varistor is not the same, and thus the requirements for the varistor also differ. It is very important to distinguish these differences for correct usage. According to the purpose of use, varistors can be divided into two main categories: ① varistors for protection, and ② varistors for circuit functions. Protection varistors: (1) Distinguish whether it is a varistor for power supply protection or a varistor for signal line and data line protection, as they must meet different technical standard requirements. (2) According to the different continuous operating voltages applied to the varistor, varistors across power lines can be divided into two types: AC type and DC type. The aging characteristics of varistors under these two voltage stresses are different. (3) According to the different abnormal overvoltage characteristics withstand by the varistor, varistors can be divided into three types: surge suppression type, high-power type, and high-energy type. 1. Surge suppression type varistors refer to varistors used to suppress transient overvoltages such as lightning overvoltage and switching overvoltage. The occurrence of this transient overvoltage is random and non-periodic, and the peak current and voltage may be very high. The vast majority of varistors belong to this category. 2. High-power type varistors refer to varistors used to absorb continuous pulse groups that appear periodically, such as varistors connected in parallel to switching power supply converters. Here, the impulse voltage appears periodically, and the period is known. The energy value can generally be calculated. The voltage peak is not large, but due to the high frequency of occurrence, the average power is quite high. 3. High-energy type varistors refer to varistors used to absorb magnetic energy in large inductive coils such as generator excitation coils and lifting electromagnet coils. For such applications, the main technical indicator is energy absorption capacity. The protective function of varistors can be repeated many times in most application scenarios, but sometimes they are made into "one-time" protective devices like current fuses. For example, varistors with short-circuit contacts connected in parallel to the loads of certain current transformers.

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