A "rectifying circuit" converts alternating current (AC) electrical energy into direct current (DC) electrical energy. Most rectifying circuits consist of transformers, a main rectifying circuit, and filters, among other components. They are widely used in applications such as adjusting the speed of DC motors, regulating the excitation of generators, electrolysis, and electroplating. Typically, rectifying circuits are composed of a main circuit, a filter, and a transformer. Since the 1970s, the main circuit has commonly been made up of silicon rectifier diodes and thyristors. The filter is connected between the main circuit and the load, serving to filter out the alternating components from the pulsating DC voltage. The use of a transformer depends on specific circumstances. The transformer's role is to match the AC input voltage with the DC output voltage and to provide electrical isolation between the AC power grid and the rectifying circuit.
The function of a rectifier circuit is to convert the lower alternating current (AC) voltage output from a step-down AC circuit into a unidirectional pulsating direct current (DC). This process is known as rectification of AC, and the rectifier circuit is primarily composed of rectifier diodes. After passing through the rectifier circuit, the voltage is no longer AC voltage but a mixed voltage containing both DC and AC components. It is conventionally referred to as unidirectional pulsating DC voltage.
