AC-DC conversion - Diodes and SCR

Power Electronics » AC-DC conversion - Diodes and SCR

The AC to DC converters are called rectifiers circuits, which can be classified based on the type of AC source and the type of semiconductor switch is used; they are usually used in either single-phase or three-phase applications but multi-phase configurations or topologies are also possible for high power applications. The switches that are used in rectifier’s designs can be either uncontrolled (diode) or controlled devices (thyristor or SCR). Rectifiers are typically used as front-end circuits in many power system applications and if not applied correctly, they can cause harmonics and low power factor when they are connected to the power grid. De Lorenzo has available two trainers which allow the study of the two types of devices (uncontrolled and controlled) mentioned before. They have modular structure and consist of didactic panels mounted on vertical frames and offer opportunity to perform various topics and experiments. They are dedicated to high schools and first years of university.

Products Details

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.
This trainer has a modular structure and it consists of didactic panels installed on a vertical frame. It is supplied with a theoretical and practical manual.
The modularity of these didactic system grants to the students a direct and immediate approach to the topics, offering the opportunity to study various subjects performing several experiments as following:
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 Thyristors
• 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
• 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

DIODES AND UNCONTROLLED RECTIFIERS

Power electronics studies the application of electronic devices to conversion and control of electrical power with the greatest possible efficiency. In this laboratory the students can analyze the proprieties of the selenium an silicon diode and learn the use of non-controlled type how single pulse rectifier, Two-pulse rectifier, Three-pulse rectifier, Six-pulse rectifier.
This trainer has a modular structure and it consists of didactic panels installed on a vertical frame. It is supplied with a theoretical and practical manual. The modularity of this didactic system can give the students a direct and immediate approach to the topics, offering the opportunity to study various subjects, performing several experiments as following:
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

SCR AND CONTROLLED RECTIFIERS

Power electronics studies the application of electronic devices to conversion and control of electrical power with the greatest possible efficiency.
In this laboratory the students can analyze the proprieties of the SCR and learn the use of single pulse converters, two-pulse midpoint converters, multi-phase converters drainage-coil converters Bridge converters.
This trainer has a modular structure and it consists of didactic panels installed on a vertical frame. It is supplied with a theoretical and practical manual.
The modularity of this didactic system can give the students a direct and immediate approach to the topics, offering the opportunity to study various subjects, performing several experiments as following:
Thyristors
• 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
• 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

Download Area

ProductsCodeCatalogueTender specsManuals SimpleVideo
AC-DC CONVERSION DCA 201
DIODES AND UNCONTROLLED RECTIFIERSDCA 201.1
SCR AND CONTROLLED RECTIFIERSDCA 201.2