Essay On Boost Converter
4.1 TYPES OF DC-DC CONVERTER DC-DC converter is an electrical circuit whose main application is to transform a dc voltage from one level to another level. It is similar to a transformer in AC source, it can able to step the voltage level up or down. The variable dc voltage level can be regulated by controlling the duty ratio (on-off time of a switch) of the converter [8]. There are various types of dc-dc converters that can be used to transform the level of the voltage as per the supply availability and load requirement. Some of them are discussed below. 1. Buck converter 2. Boost converter 3. Buck-Boost converter Boost converter is explained below: Boost converter A Boost converter is a switch mode DC to DC converter in which the …show more content…
inductor partially discharges before the start of the switching cycle. b) Discontinuous conduction mode in which the current through inductor goes to zero i.e. inductor is completely discharged at the end of switching cycle [9],[10]. Continuous conduction mode case-1: When switch in ON the diode will be open circuited since the n side of diode is at higher voltage compared to p side which is shorted to ground through the switch. Hence the boost converter can be redrawn as follows Fig. 4.2 Circuit diagram of continuous conduction mode During this state the inductor charges and the inductor current increases. The current through the inductor is given as Assume that prior to the opening of switch the inductor current is I’L, off. Since the input voltage is constant Assume the switch is open for ton seconds which is given by D*Ts where D is duty cycle and Ts is switching time period. The current through the inductor at the end of switch on state is given
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