ALTERNATE CURRENT - DIRECT CURRENT CONVERSION

In most of the applications of power electronics, the input power is in the form of a sinusoidal wave coming from the mains network which is then converted to direct current.

In many cases the conversion is of the non-controlled type, with the use of diode rectifiers.

However, in some applications, such as, for example, some types of drives of ac and dc motors, it is necessary that the dc output voltage be controllable.

In this case, thyristor converters for the mains frequency phase control are used. They are utilized in particular in high voltage dc power transmission or in all those applications where it is necessary to control the power flow in both directions between the dc side and the ac side.

DCA 201.1 DIODES AND UNCONTROLLED RECTIFIERS

LIST OF EXPERIMENTS

Uncontrolled diodes
Selenium diode
Silicon diode

Uncontrolled static converter circuits

  • Single pulse rectifier E1UK, ohmic load
  • Single pulse rectifier E1UK, ohmic-inductive load
  • Two-pulse rectifier M2UK, ohmic load
  • Two-pulse rectifier M2UK, ohmic-inductive load
  • Two-pulse bridge rectifier B2UK, ohmic load
  • Two-pulse bridge rectifier B2UK, ohmic-inductive load
  • Three-pulse rectifier M3UK, ohmic load
  • Three-pulse rectifier M3UK, ohmic-inductive load
  • Six-pulse rectifier M6UK, ohmic load
  • Six-pulse rectifier M6UK, ohmic-inductive load
  • Six-pulse bridge rectifier B6UK, ohmic load
  • Six-pulse bridge rectifier B6UK, ohmic-inductive load

 

 

DCA 201.2 SCR AND CONTROLLED RECTIFIERS

 

LIST OF EXPERIMENTS

Thyristor

  • SCR

Single pulse converters

  • Single pulse converter E1CK, ohmic load
  • Single pulse converter E1CK, inductive load
  • Single pulse converter E1CK, ohmic-inductive load
  • Single pulse converter E1CK, ohmic-inductive load and free-wheeling diode
  • Single pulse converter E1CK, ohmic-inductive load and back e.m.f.
  • Single pulse rectifier E1UK, ohmic-capacitive load
  • Single pulse converter E1CK, ohmic-capacitive load

Two-pulse midpoint converters

  • Two-pulse midpoint converter M2CK, ohmic load
  • Two-pulse midpoint converter M2CK, ohmic-inductive load

 Multi-phase converters

  • Three-pulse midpoint converter M3CK, ohmic load
  • Three-pulse midpoint converter M3CK, ohmic-inductive load
  • Six-pulse midpoint converter M6CK, ohmic load
  • Six-pulse midpoint converter M6CK, ohmic-inductive load

Drainage-coil converters

  • inductive load
  • Double three-pulse star converter M3CK2, ohmic load

Bridge converters

  • Half-controlled bridge B2HK, ohmic load
  • Half-controlled bridge B2HK, ohmic-inductive load
  • Half-controlled bridge B2HZ, ohmic load
  • Half-controlled bridge B2HZ, ohmic-inductive load
  • Fully-controlled bridge B2C, ohmic load
  • Fully-controlled bridge B2C, ohmic-inductive load
  • Fully-controlled bridge B2C, ohmic load and back e.m.f.
  • Fully-controlled bridge B2C, dc motor load
  • Fully-controlled bridge B2C, ohmic load and supplementary dc voltage
  • Fully-controlled bridge B2C, dc generator load
  • Three-phase half-controlled bridge B6HK, ohmic load
  • Three-phase fully-controlled bridge B6C, ohmic load
  • Three-phase fully-controlled bridge B6C, ohmic-inductive load