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 caused by 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 parameters 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: most 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 ferrule surface, 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 polished, 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 installation and fixation of the connector. To align the optical fibers as precisely as possible, the machining precision requirements for the ferrule and coupling sleeve are 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 using varistors varies, and the voltage/current applied to the varistor differs accordingly. Therefore, the requirements for varistors also vary. It is crucial to distinguish these differences for correct usage. Based on the intended use, varistors can be classified into two main categories: ① protection varistors, and ② circuit function varistors. Protection varistors: (1) Distinguish whether the varistor is used for power supply protection or for signal line and data line protection, as they must meet different technical standards. (2) Depending on the continuous operating voltage applied to the varistor, varistors across power lines can be divided into AC types and DC types. The aging characteristics of varistors under these two voltage stresses differ. (3) Based on the abnormal overvoltage characteristics that the varistor can withstand, varistors can be categorized into three types: surge suppression type, high-power type, and high-energy type. 1. Surge suppression varistors are used to suppress transient overvoltages such as lightning-induced overvoltages and switching overvoltages. These transient overvoltages occur randomly and non-periodically, and their peak current and voltage values may be very high. The vast majority of varistors fall into this category. 2. High-power varistors refer to those used to absorb periodic continuous pulse groups, such as varistors connected in parallel with switch-mode power supply converters. Here, the impulse voltage occurs periodically with a known cycle, and the energy value can generally be calculated. Although the peak voltage is not very high, the average power is considerable due to the high frequency of occurrence. 3. High-energy varistors are used to absorb magnetic energy from large inductive coils, such as generator excitation coils and lifting electromagnet coils. For such applications, the primary technical indicator is energy absorption capacity. In most application scenarios, the protective function of varistors can act repeatedly multiple times. However, sometimes they are designed as "one-time" protective devices similar to current fuses. For example, varistors with short-circuit contacts connected in parallel to the load of certain current transformers.

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