幸运二八Thyristor Rectifier(SCR Rectifier) is a common DC power supply converting AC input to DC output, through the thyristor's half controlled characteristics to realize the rectification and output current and voltage regulation.
幸运二八In this article, introduce the double star with IPT thyristor rectifier circuit, this circuit is mainly applied for the rectifier with output low voltage and high current, which gets higher conversion efficiency, and could use less current rating of thyristors or less quantity of thyristors in parallel.
幸运二八In this article, introduce three phase brdige circuit of thyristor rectifier, it is mainly applied for the rectifier with higher voltage, compared with double star with IPT circuit, the rectifier transformer with three phase bridge is lower, widely used for rectifier for caustic soda, higher voltage of metal electrowinning, hydrogen generation by water electrolysis etc. applications.
幸运二八Before the failure of rectifier, is there any explosion sound? If yes, the IGBT is likely to have been destroyed. Visually observe whether the IGBT has been burnt or burst. If without above case, proceed as follows to measure the IGBT by multimeter diode position, if the measured value with big difference from the normal value, the IGBT is likely to be damaged.
幸运二八Single-phase rectifiers are commonly used for power supplies for domestic equipment. However, for most industrial and high-power applications, three-phase rectifier circuits are the norm. As with single-phase rectifiers, three-phase rectifiers can take the form of a half-wave circuit, a full-wave circuit using a center-tapped transformer, or a full-wave bridge circuit.
Rectifier circuitsRectifier circuits may be single-phase or multi-phase (three being the most common number of phases). Most low power rectifiers for domestic equipment are single-phase, but three-phase rectification is very important for industrial applications and for the transmission of energy as DC (HVDC).