Intermediate relay with extremely high reliability

Abstract

The invention discloses a circuit principle of an intermediate relay with extremely high reliability. The intermediate relay comprises a wide-voltage low-power-consumption power supply circuit, an anti-alternating-current detection circuit, a signal sampling, shaping, filtering and starting circuit, a relay constant-current acting control circuit and a dummy load current-limiting switching circuit with the starting power not smaller than 5W. The circuit adopts a low-power-consumption CMOS logic device and a high-power NMOS power device, and has the advantages of active interference absorption, no maloperation and no refusal operation, external interference resistance, high reliability, guarantee of reliable operation when the input voltage of the power supply is low, and guarantee of no burnout and excessive heating when the input voltage is extremely high. According to the invention, the defect that the performance of the conventional intermediate relay is reduced or the operation of the conventional intermediate relay is rejected and mistakenly operated under certain specific occasions is overcome, the correct operation performance of the intermediate relay under conventional and unconventional conditions is ensured to the greatest extent, and the reliability of the intermediate relay is greatly improved. The relay is especially suitable for matching of key high-value electrical equipment in the fields of electric power, chemical engineering, rail transit vehicles, ships, military industry, spaceflight and the like, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of relays, in particular to an intermediate relay with extremely high reliability. Background technique [0002] As an intermediate component in the electrical control system, the intermediate relay is often used to expand the contact capacity and quantity. It is a typical type of relay. It is possible to release the action following the presence or absence of the driving signal (the action is as fast as possible with the signal, and the release is as fast as possible without the signal). [0003] Intermediate relays are widely used in fields such as electric power, rail transit vehicles, chemicals, ships, and military equipment. Due to the complex use environment, misoperation or refusal of intermediate relays will lead to personal and equipment safety or major property losses. Therefore, the operation of intermediate relays Reliability requirements are extremely high. Here are a few typical application sc...

AI Technical Summary

Problems solved by technology

Therefore, although the existing technology can solve some interference problems in practical applications, there are still obvious deficiencies in its own reliability.

Images