This document presents a design for a DC-DC boost converter for use in a solar electric system. It includes a block diagram of the system components, an explanation of how a basic boost converter works to output a voltage higher than the input voltage, and descriptions of switching devices, integrated circuits, advantages, disadvantages, and applications of boost converters. The presentation was created by three students as part of a class project on solar energy systems.
4. BOOST CONVERTER
Output voltage always higher
than the input voltage
When the switch is ON:
Diode is reversed biased
output circuit is thus isolated
inductor is charged.
When the switch is OFF:
The output stage received energy
from the inductor as well as from
the input.
Filter capacitor is very large to
ensure constant output voltage
i
iin + vLL–
iD
Iout
L
Vin
C
iL
L
iC
+
Vout
–
D
+ vL −
Vd
C
S
iL
+
vo
−
D
+ vL Vd
S
C
+
vo
-
5. SWITCHING DEVICE
In this MOSFET is used
as switching device
It is voltage-controled
device and also it requires
small input current
Switching speed is very
high
It operates in nano sec’s
8. ADVANTAGES
Only one switch
High effecience
Unidirectional output current
Provides one polarity output voltage
Low cost
Easy to analyze
Easy to understand
Simple circuit
10. APPLICATIONS
Commanly used as LED driver
Used for Solar power system
Used for Power factor corrections
Used in HVDC system
Applicable for LCDBACKLIGHTS &
FLASH LIGHTS
Used in HVE(Hybrid electric
vehicles)
