Applications of dual converters

The blow shown figure shows single phase dual converter using thyristors. As explained above, in single phase dual converter we use single phase rectifier circuit for converting single phase AC into steady DC.

The Converter 1 consists of Rectifier. Then the rectified DC fed to a filter which removes pulses from rectified DC and converts it to a pure DC by filtering.

After that, this pure DC is fed to load and from the load, it is given to inverter circuit which converts this DC to AC and finally this AC of inverter taken as the output.

In three phase dual converter, we make use of three phase rectifier which converts 3 phase AC supply to DC. The structure of the converter is same as single phase dual converter.

The output of three phase rectifier is fed to filter and after filtering the pure DC is fed to the load. At last, the supply from the load is given to last bridge that is inverted. The dual converter is a power electronics control system to get either polarity DC from AC rectification by the forward converter and reverse converter.

It can run a DC motors in either direction with speed control too. The two three phase full converter connected back to back to form the dual converters as shown in below figure:. The below wave forms belongs to three phase dual converters:. When circuit is fed with the AC supply the thyristors.

T 5 and T 6 Produces B- phase. Converter 2 T 5 and T 6 forms R- phase. T 7 and T 8 forms Y — phase. T 9 and T 10 forms B — phase. For R-phase the direction is given as. For B-phase the direction is given as. Principle of operation 4.

Mode of operation 5. Four quadrant operation 6. Ideal Dual Converter 7. Types of Dual converter 8. Applications of dual converter 3. C input given to converter 1 for rectification. C on positive cycle, as well negative cycle is given to set of reverse biased thyristors which gives a D.

C on negative cycle completing full wave rectified output can be given to load. Non-circulating current mode. Circulating mode. So there is no circulating current between the converters. So circulating current is present. In this condition, Vdc and Idc are positive. The average output voltage of the converter 1 is V01 and converter 2 is V Block Diagram for ideal dual converter Single-phase dual converter.

Three-phase dual converter. Single Phase Dual Converter Three Phase Dual Converter Cyclo Converter Working Principle Types of Cycloconverters Mainly there are two types according to the mode of operation which are showing below 1.

Blocking mode Cycloconverters 2. Circulating current Cycloconverters This type of operation is known as blocking mode operation and the converters which use this method of operation are termed as blocking mode cycloconverters. Brittany Martinez Dec.