The working principle of a rectifier
Release time :
2025-07-17
A rectifier is a device that converts alternating current (AC) to direct current (DC). From the definition, it is not difficult to find that its main function is: to convert alternating current (AC) into direct current (DC), and then supply it to the load or the inverter after filtering.
A rectifier is a device that converts alternating current (AC) to direct current (DC). From the definition, it is not difficult to find that its main function is: to convert alternating current (AC) into direct current (DC), and then supply it to the load or the inverter after filtering. So just how important is a rectifier? Let's put it this way: since all electronic devices need to use direct current, but most power companies use alternating current, unless they are powered by batteries, rectifiers are indispensable inside the power supplies of all electronic devices. It is evident that rectifiers are indispensable power supply devices for electronic equipment. For instance, the most common automotive rectifier also plays a crucial role in cars. Through the principle of rectification, not only can the phenomenon of idle vibration be reduced, power be enhanced, and problems such as weak acceleration when climbing slopes, stalling, and gear dropping be effectively improved, but also the battery and the vehicle's electrical circuit system can be protected, and their service life can be prolonged. So, the small rectifier plays a huge role in our daily life.
The rectifier can also provide charging voltage to the battery. Therefore, it also serves as a charger. However, it should be particularly noted that in operation, apart from supplying power to the load, the rectifier should be able to restore the battery's discharge power to 95% within ten times the discharge time. When the battery is recharged, the rectifier should keep the battery fully charged until the next discharge.
Sometimes, rectifiers are not necessarily merely used to generate direct current. In very early times, when a thin metal wire known as a "cat's beard" was pressed onto a galena crystal on a crystal radio, a point contact rectifier was formed, which was called a crystal detector or a crystal detector. Therefore, rectifiers can sometimes be "processed" to replace detectors. One of its special functions is to detect waves. For instance, in a gas heating system, flame rectification serves as a "detector" to check for the presence of a flame. If a flame exists, the plasma in the current path formed by the two metal electrodes on the outside of the flame will rectify the generated alternating voltage.
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Source: Xianji.com
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