Know about Parallel inverter, High-Frequency Inverter and Rectifier module

The output voltage and current are Vo and Io, respectively. Making the source current constant is L's process. Capacitor C connects in parallel with the load through the transformer as this inverter operates. As a result, it is know as a parallel inverter Static Transfer Switch .

Advantages and Disadvantages of Parallel Inverter


  1. It uses the simple class C commutation.
  2. Only two SCRS are require compare to at least four in bridge inverter configuration. (additional auxiliary SCRS are also need in bridge configuration).
  3. It is a simple and economical circuit.
  4. With the help of a filter connected on the output side, it is possible to obtain a good quality sinewave at the output.
  5. Commutation components do not have to bring the entire load current.
  6. The load voltage waveform is not dependent on the load, as it does in the series inverter.

Disadvantages :

  1. This circuit is suitable to handle only fixed loads.
  2. There is always a possibility of magnetic saturation of the core.
  3. The centre-tapped output transformer is essential for the operation of the circuit. The transformer efficiency will not be 100%; hence the efficiency of this type of inverter will be reduce.
Static Transfer Switch

Rectifier module

How it works

A variable output voltage also output frequency must first be create by converting mains electricity into a DC voltage. A rectifier is the one also who does this task. In single-phase applications, four rectifier module diodes are need also in three-phase applications, six diodes are require. These diodes are typically 50 or 60 Hz.

A fast-switching diode is also use when a high-frequency signal needs to be rectifier. When the frequency inverter turns on, an extensive charging current travels via the diodes into the DC-link capacitor. A rectifier module with half-control and thyristors for phase-controller modulation can be use also to limit the charge current.

Rectifier module

High-frequency inverter

High-frequency inverter make up a sizable portion of the retail market. They frequently cost less, have smaller footprints, and may handle industrial loads less well. High - Frequency inverters use also numerous smaller transformers and have more than twice as many components.