BOOST CONVERTER IS USEFUL FOR SOLAR PANEL, IN ORDER TO BOOST THE VOLTAGE OBTAIN FROM THE PV PANEL. LETS WE CAN SEE ABOUT BOOST CONVERTER.
The boost converter, also known as the
step-up converter, is another switching converter that has the same components
as the buck converter, but this converter produces an output voltage greater
than the source. The ideal boost converter has the five basic components,
namely a power semiconductor switch, a diode, an inductor, a capacitor and a
PWM controller. The placement of the inductor, the switch and the diode in the
boost converter is different from that of the buck converter.
The operation of the circuit is explained
now. The essential control mechanism of the circuit is turning the
power semiconductor switch on and off. When the switch is ON, the current
through the inductor increases and the energy stored in the inductor builds up.
When the switch is off, current through the inductor continues to flow via the
diode D, the RC network and back to the source. The inductor is discharging its
energy and the polarity of inductor voltage is such that its terminal connected
to the diode is positive with respect to its other terminal connected to the
source. It can be seen then the capacitor voltage has to be higher than the
source voltage and hence this converter is known as the boost converter. It can
be seen that the inductor acts like a pump, receiving energy when the switch is
closed and transferring it to the RC network when the switch is open.
When the switch is closed, the diode does not
conduct and the capacitor sustains the output voltage. The circuit can be split
into two parts, As long as the RC time constant is very
much larger than the on-period of the switch, the output voltage would remain
more or less constant.
When the switch is open, There is a single connected circuit in this case.
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