In the transformer, there is a term called the DC magnetization phenomenon of the transformer. This phenomenon has a big impact on the transformer. DC magnetization phenomenon: When the secondary winding of the rectifier transformer has a DC component, the DC component flows through the secondary winding and the iron core is excited. This is the DC magnetization phenomenon. This phenomenon often occurs in half-wave circuits, and its harm is easy to cause The iron core is saturated, increasing the loss. So if you want to look at the loss of the transformer, you can directly look at the DC magnetization phenomenon of the transformer. Many procedures can be omitted in the middle. The DC magnetization of the transformer is also classified.
DC magnetization is divided into DC pulsating current magnetization method and DC constant current magnetization method. The former is simpler in electrical implementation than the latter, and is generally used for the magnetization of components in the residual magnetic field detection method. In active magnetic field detection, this magnetization will generate a strong AC magnetic field signal in the detection signal, which increases the detection signal processing Complexity, reduce the signal-to-noise ratio of the detection signal. The DC constant current magnetization method has higher requirements for the current source, and the excitation current is generally several amperes or even hundreds of amperes. Like the AC magnetization method, the magnetization intensity of the DC magnetization method can be easily adjusted by controlling the size of the current, but as the continuous use time increases, the heating of the electromagnet is unavoidable. You can usually browse more websites about transformers and learn more.
