15-04-2017, 12:33 PM
The DC-DC converter is a converter where we are regulating the input voltage to obtain the desired output voltage which is greater or equal to or less than the input voltage with positive or negative polarity. A large number of dc-dc converters are available in the world of which SEPIC (single-ended primary inductor converter) is one of them. To analyze the converter, there are many techniques available. This work presents the use of MATLAB / SIMULINK to study the stability of the converter. The state space technique is applied to this higher-order converter and becomes a transfer function.
Some applications of the converters only need to increase or increase the voltage and can simply use the corresponding converters. However, sometimes the desired output voltage will be in the input voltage range. When this is the case, it is usually best to use a converter that can decrease or increase the voltage. Buck-boost converters can be cheaper because they only require a single inductor and a capacitor. However, these converters suffer a lot of ripple from the input current. This ripple can create harmonics; In many applications these harmonics require the use of a large capacitor or an LC filter. This often makes the buck-boost expensive or inefficient. Another problem that can complicate the use of buck-boost converters is the fact that they reverse the voltage. Cúk converters solve both problems using an additional capacitor and inductor.
Some applications of the converters only need to increase or increase the voltage and can simply use the corresponding converters. However, sometimes the desired output voltage will be in the input voltage range. When this is the case, it is usually best to use a converter that can decrease or increase the voltage. Buck-boost converters can be cheaper because they only require a single inductor and a capacitor. However, these converters suffer a lot of ripple from the input current. This ripple can create harmonics; In many applications these harmonics require the use of a large capacitor or an LC filter. This often makes the buck-boost expensive or inefficient. Another problem that can complicate the use of buck-boost converters is the fact that they reverse the voltage. Cúk converters solve both problems using an additional capacitor and inductor.
It can be understood in the following video:
