What is a Telecom Relay ?
Almost 100% of the relays used in modern SPC exchanges are PCB electromagnetic relays with contacts. Structurally, the vast majority of the first and second generation communication relays are clapping magnetic circuit structure, push rod mechanical transmission, twin contacts are adopted, and the contact material is AgPd alloy. Since the second generation, in order to improve its sensitivity, samarium cobalt high-energy alloy permanent magnets have been used to form a bridge magnetic circuit, but a considerable part of the relays are still monostable.
Design of FBelec Telecom Electromechanical Relays
There are many people in China who design and manufacture the first, second and third generation communication relays, but no one cares about the fourth generation communication relays, which shows that there is still a considerable gap between China's relay industry and the world in terms of relay equipment manufacturing level, product design level and production management level. These gaps are:
(1) except for relay design applied in aerospace and military, civil and commercial relays lack standard design specifications.
⑵ for all kinds of magnetic circuit structures with ultra-small permanent magnets, there is a lack of actual analysis and calculation in the factory, and the relay manufacturer can not correctly describe and use what kind of magnetic circuit structure to form the "three-dimensional field" is the best, especially how to make effective use of magnetic energy under the condition of small working air gap and large magnetic leakage distribution;
(3) no one has conducted in-depth research, analysis and practicability on new edge materials and new processes. Such as ultra-fine electromagnetic wire, high-energy permanent magnet, excellent engineering plastics and relay accessories, the design of communication relay lacks effective technical support.
(4) lack of engineering and technical personnel who not only understand the basic theory, design and process skills of relay, but also know the special manufacturing equipment of relay. Relay product designers and equipment designers and manufacturers are two teams, which lack technical running in. Generally, there is little problem in the design and manufacture of first-generation, second-generation and third-generation communication relays, but I'm afraid they are not so handy when it comes to the fourth generation of ultra-small communication relays.
(5) most enterprises rarely have the ability to manufacture electromechanical production lines with high speed, high efficiency, good repeatability and good consistency.
Development trend of Telecom Relay
Miniaturization
With the rapid development of communication equipment, the space of mounting plate is shrinking. On the premise of not damaging the performance, miniaturization has become an inevitable trend for each manufacturer. The size of communication relay has changed from 20.0 from the first generation to the fourth generation × ten × 10.0mm to 10.0 × six point five × 5.0mm, the volume is reduced by more than 6 times.
Low Power Consumption
From the second generation to the fourth generation, the power consumption of communication relay is reduced from 200MW to 100MW, which is reduced by 50%; It also has energy-saving and memory functions, which effectively reduces the input of power supply of the whole machine.
Reliability
The international standard iec61811-55 for the fourth generation communication relay puts forward more stringent requirements for surge withstand voltage, insulation withstand voltage, insulation spacing for surge protection and isolation between input and output. Good relay parameter consistency and high reliability make the whole machine run correctly.
Magnetic system efficiency
Permanent magnet materials will develop rapidly, and the properties of magnetic materials will be improved by adding components. Hard and soft magnetism will be combined to produce materials with high persistence and high coercivity. In order to reduce the volume of some high-end communication relays, permanent magnets are no longer used, flat coil system appears, and some adopt electrostatic driving mode.
Product mix
The structure of the third and fourth generation communication relays is quite different from that of the first and second generations. The double coil symmetrical balanced rocker magnetic circuit structure with high-energy permanent magnet is adopted. The contact is spot welded on the strip and then injected into the whole. The requirements for precision, sensitivity and material are higher.
NINGBO FBELE ELECTRONICS CO.,LTD.
FBELE company was founded in 1997, is China's leading manufacturer of acoustic and other electronic components, we designs,manufactures, distributes high quality products in very competitive price, bestservice, timely delivery, small order acceptable, etc. Our products include piezo ceramic element, piezoelectric buzzer, magnetic buzzer,speakers, transducer, receiver, electret condenser microphone, magnetic contact. Piezoelectric alarm,ultrasonic sensor,PZT ceramics,etc.
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