Arc welding rectifier, using a three-phase arc welding rectifier power supply with a silicon rectifier. It was once the second generation widely used DC arc welding power source, but due to its high copper and iron consumption, it has now been replaced by electronic controlled arc welding power sources such as thyristors Working principle: The alternating current generated by the automobile generator is converted into direct current after being rectified, but its waveform still has irregular fluctuations, directly affecting the accuracy of vehicle ignition; The output voltage cannot be kept relatively constant, resulting in an energy difference between each spark plug ignition, which can easily cause the vehicle's engine to shake, resulting in gear shifting jerks, slow and weak acceleration, unstable idle speed, and low efficiency of vehicle air conditioning. This greatly reduces the performance and service life of onboard electrical equipment; In addition, the aging of the circuit system in elderly cars has an increasingly significant impact on the vehicle due to the increasing resistance of the circuit. The function of electronic rectifiers is to help vehicles eliminate clutter interference, stabilize output voltage, improve the instantaneous discharge capacity of the power system, increase torque output, accelerate throttle response, extend battery life, shorten car engine start time, improve ignition efficiency, etc., especially for small displacement vehicles, the effect is relatively obvious. The current of the rectifier semiconductor PN junction is high during forward bias and low during reverse bias. Rectifier diode is a type of PN junction diode that utilizes the unidirectional conductivity of PN junctions to convert AC current into DC. Devices with a current capacity of less than 1 ampere are usually referred to as rectifier diodes, while devices with a current capacity of more than 1 ampere are referred to as rectifiers. The commonly used semiconductor rectifiers include silicon rectifiers and selenium rectifiers, with many product specifications, ranging from tens of volts to thousands of volts, and currents from a few amperes to thousands of amperes. Rectifiers are widely used in various forms of rectifier power supplies. The high-power rectifier power supply requires a large current capacity, high breakdown voltage, and good heat dissipation performance of the rectifier. However, this type of device has a large junction area and capacitance, resulting in a low operating frequency, usually below tens of kilohertz. Silicon materials have a large bandgap and good thermal conductivity, making them suitable for producing high-power rectifier devices. High voltage silicon stacks are often used in high-voltage rectifier devices, which are composed of multiple rectifier device cores connected in series. Their reverse withstand voltage is determined by the withstand voltage of the cores and the number of cores connected in series, with a maximum withstand voltage of several hundred kilovolts. If a high-frequency rectifier circuit is used at very high frequencies, when the cycle of the AC voltage is equivalent to the recovery time from the on state to the off state of the rectifier, the rectifier no longer has a rectification effect on the high-frequency voltage. To meet the needs of high-frequency operation, gold doping is usually used in silicon rectifiers to shorten the lifespan of injected minority carriers and achieve the goal of reducing recovery time. In order to reduce the possibility of device damage caused by overvoltage breakdown and improve the reliability of rectifier devices, silicon avalanche rectifiers can be used. In this type of device, when the reverse voltage exceeds the allowable peak value, a uniform avalanche breakdown occurs across the entire PN junction, and the device can operate under high voltage and current, so it can withstand considerable reverse surge power. When making this type of device, it is required to have few material defects, uniform resistivity, flat junction surface, and appropriate protection should be provided for the exposed junction area to avoid surface breakdown. The selenium rectifier has a large overload resistance capacity and strong ability to withstand reverse surge power. In two basic types of rectifiers based on high-power diodes or thyristors, the high-voltage AC power of the power grid is converted into DC power through rectifiers. Mention other types of rectifiers in the future (near or far): choppers, chopper DC/DC converters, or current source inverters based on cutting-edge products of uncontrollable diodes. Obviously, this type of rectifier contains a lot of content to be developed technically, but it can demonstrate advantages, such as being loaded into the power grid with very small harmonic interference and a power factor of 1. A rectifier is a rectifier device that converts alternating current (AC) into direct current (DC). It has two main functions: first, to convert alternating current (AC) into direct current (DC), which is filtered and supplied to the load, or to the inverter; Secondly, provide charging voltage to the battery. Therefore, it also serves as a charger