AC-AC conversion - TRIAC and phase control

Power Electronics » AC-AC conversion - TRIAC and phase control

The AC to AC converters are more complicated than the AC to DC converters because AC conversion requires change of voltage, frequency and bipolar voltage blocking capabilities, which usually requires complex device topologies. Converters that have the same fundamental input and output frequencies are called ‘‘AC controllers’’ and the conversion is from a fixed voltage fixed frequency to a variable voltage fixed frequency (as applications light dimmers and control of single-phase AC motors that are typically used in home appliances). Converters, which convert a fixed voltage fixed frequency to variable voltage variable frequency, are called “Cycloconverters”; they are used in high power applications driving induction and synchronous motors, usually phase-controlled and traditionally use thyristors due to their ease of phase commutation. Another way of achieving AC/AC conversion is by using AC/DC and DC/AC through an intermediate DC link. De Lorenzo, also here, has available two trainers: one allows the study of the light dimmer (using DIAC and TRIAC) with fault simulation and one to study in deep the TRIAC and the controlled AC/AC converters. They are dedicated to high schools and first years of university.

Products Details

ALTERNATE CURRENT - ALTERNATE CURRENT CONVERSION

The electrical power in alternate current is controlled by means of thyristors. The main fields of application of the control of alternate current are in the control of temperature, lighting and induction motors.
The main types of control are: phase control, on-off control and proportional time control.
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:
Thyristor
• TRIAC Single-phase controllers
• Single-phase ac controller W1C, ohmic load
• Single-phase ac controller W1C, inductive load
• Single-phase ac controller W1C, ohmic-inductive load
• Single-phase ac controller W1, ohmic load
• Single-phase ac controller W1, ohmic-inductive load
• Half-controlled single-phase controller W1H, ohmic load Three-phase controllers
• Fully controlled three-phase controller W3C, star ohmic load without neutral
• Fully controlled three-phase controller W3H, star ohmic load without neutral
• Three-phase controller W3C2, star ohmic load without neutral
Phase control for the regulation of lighting with fault simulation.
Double time-constant standard light dimmer circuit consisting of triac, diac, two control potentiometers, resistors and capacitors.
A total of 20 faults can be switched on using switches located behind a cover.
Typical faults: interruptions, short-circuit, faulty components and faulty design.

THYRISTORS AND CONTROLLED AC/AC CONVERTERS

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 properties of the thyristor and learn the use of single-phase controllers and three-phase controller.
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:
Thyristor
• TRIAC Single-phase controllers
• Single-phase ac controller W1C, ohmic load
• Single-phase ac controller W1C, inductive load
• Single-phase ac controller W1C, ohmic-inductive load
• Single-phase ac controller W1, ohmic load
• Single-phase ac controller W1, ohmic-inductive load
• Half-controlled single-phase controller W1H, ohmic load Three-phase controllers
• Fully controlled three-phase controller W3C, star ohmic load without neutral
• Fully controlled three-phase controller W3H, star ohmic load without neutral
• Three-phase controller W3C2, star ohmic load without neutral

LIGHT DIMMER FAULT SIMULATOR

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 properties of the light dimmer circuit with the triac, diac, two control potentiometers, resistors and capacitors.
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:
• Fault-free dimmer
• DIAC shorted
• DIAC with high resistance
• The gate of TRIAC works like a diode
• Control circuit break
• Assembly or component fault
• Trimmer shorted
• Auxiliary RC circuit not included
• Variable resistance R shorted
• TRIAC shorted

Download Area

ProductsCodeCatalogueTender specsManuals SimpleVideo
AC-AC CONVERSION - TRIAC AND PHASE CONTROLDCA 202
THYRISTORS AND CONTROLLED AC-AC CONVERTERSDCA 202.1
LIGHT DIMMER FAULT SIMULATORDCA 202.2