Rectifier transformer is a transformer specially used for rectifier system.
1. Supply appropriate voltage to rectifier system; 2. Reduce the pollution of waveform distortion caused by rectifier system to power grid.
DC power grid used for mines or urban electric locomotives. Since the valve side is connected to the overhead line, there are many short-circuit faults, the DC load changes greatly, and the electric locomotive is often started, resulting in short-term overloads of varying degrees. For this reason, the temperature rise limit and current density of this type of transformer are both low. The impedance is about 30% larger than the corresponding power transformer.
Mainly used to power DC motors in electric transmission, such as the armature and excitation of rolling mills.
The voltage of this type of rectifier transformer is generally above 110kV, and the capacity is tens of thousands of volt-amperes. Special attention should be paid to the AC and DC superposition of insulation to the ground. In addition, there are DC power supplies for electroplating or electrical processing, DC power supplies for excitation, DC power supplies for charging and electrostatic dust removal, etc.
