Welders
In welders DC applied most often bridge circuit on power silicon rectifier diodes - valves, with a view to obtaining permanent welding voltage and current. It differs from the variable so that when it is very hot region of the arc near the positive (+) its poles, which allows a gentle exercise welding workpiece mainly consumable welding electrode or electrodes savings, implementing cutting metal arc welding.
The use of rectifiers to convert AC to DC led to the concept of average current for the module (ie, without taking into account the sign of the ordinate) for the period. When full-wave rectification of the average value of modulus is defined as the average of all ordinates of the two half-waves for a period without regard to their signs (ie, assuming all the ordinates between positive, and takes place at an ideal full-wave rectification.
Receivers of electricity with non-linear characteristics are primarily various transformative install AC / DC, using different valves.
These include rectifier systems for:
Railway traction
Urban Electric
Electrolysis (the production of aluminum, chlorine, caustic soda, etc.)
Food drives of rolling mills
Generator excitation Power
As the gates until recently used mainly mercury rectifiers (uncontrolled and controlled). At the present time are widely used mainly silicon semiconductor rectifiers. Thyristor rectifiers are introduced.
Typically, rectifier installation to handle large power and special transformers are connected through to the mains at a voltage of 6 - 10 kV. Rectifier installation of small power carried by the three-phase circuit with zero output.