Power Electronics

A Push Pull Converter is dc to dc converter that provides an output voltage that can be either less than or greater than the dc input voltage VS. The push-pull converter give multiple outputs with single input. This can be achieved by changing the winding’s turns ratio of the transformer. Push-pull designs are popularly used in […]

The cuk converter is dc to dc converter gives an output voltage which is less than or greater than the input voltage with a polarity reversal. That means, the polarity of output voltage is opposite to that of the input voltage. Figure 1 shows the cuk converter using BJT.

A buck-boost converter provides an output voltage that can be either less than or greater than the dc input voltage VS. Hence the name “buck boost”. The output voltage polarity is opposite to that of the input voltage. It is a combination of buck and boost converters.

In the dc-dc buck converter, the input voltage is constant dc voltage whereas the output voltage is a variable dc voltage and the output voltage is lower than the input voltage. Hence the name dc-dc buck converter. Figure 1: Circuit Diagram of Buck Converter.

Figure 1: RC Triggering of SCR. The limited range of firing angle only upto 90° in the resistor trigger method of an SCR can be overcome by using RC trigger circuit of SCR. The limited range of firing angle can be increased from 90° to 180°, if the gate circuit of an SCR is supplied by