Dual Converter is an Electronic Device or Circuit made by the combination of two bridges. One of them works as Rectifier(Converts A.C. to D.C.) and other bridge works as Inverter(converts D.C. into A.C.). Thus an electronic circuit or device in which two processes take place at same time, is known as Dual Converter. Also Read: What is UPS (Uninterrupted Power Supply) A dual converter may be single phase or 3 phase device. The simple diagram given above is of single phase dual converter. The difference between single phase and three phase dual converter is just that in Three phase we uses three phase rectifier at first stage, while in single phase dual converter we make use of single phase rectifier circuit at first bridge.
Single Phase Dual Converter:
As explained above that in single phase dual converter we uses single phase rectifier circuit for converting single phase A.C. into steady D.C. Bridge No. 1 consists of Rectifier. then the rectified D.C. fed to a filter which removes pulses from rectified D.C. and converts it to a pure D.C. by filtering. After that, this pure D.C. is fed to load and from load it is given to inverter circuit which converts this D.C. to A.C. and finally this A.C. of inverter taken as output.
Also Read: What is SCR (Silicon Controlled Rectifier)
Three Phase Dual Converter:
In three phase dual converter, we make use of three phase rectifier which converts 3 phase A.C. supply to D.C. The rest of the process is same and same elements are used. The output of three phase rectifier is fed to filter and after filtering the pure D.C. is fed to load. At last the supply from load is given to last bridge that is inverter. It do the Invert process of rectifier and converts D.C. into 3 phase A.C. which appears at output.
Also Read: Classification (Types) of UPS
Applications of Dual Converter:
Dual converters are mostly used at industries where we requires reversible D.C. Generally Dual Converters are used for Speed Control of D.C. Motors etc.