50-220 v dc boost converter design presentation
DESCRIPTION
Boost Converters are an integral part of power electronics. In this project a customized boost converter was designed and simulated to meet the operational requirements of 220 V DC input relay. Technology Used: MultiSim12TRANSCRIPT
Overview of power grid technology and Simulation of 50VDC- 220VDC Switching Boost Converter using MultiSim12
Prepared at TPDDL
SUPERVISORY HEADSShri Sunil KothariMr. Rajendra Sethiya
Prepared by: Smriti12020802809
ECE’09
What is a Grid ?An electricity network which includes:• Electricity generation • Electric power transmission • Electricity distribution
What are topologies ? Why are they required?• Physical/ logical layout of any network
SMART GRIDS
• Two-way flow of electricity/information• Create automated and distributed advanced energy delivery
network.
Systems in smart grid:
• Infrastructure•Advanced electricity generation, delivery & consumption•Advanced information metering, monitoring •Advanced communication technologies
• Management• Protection
“Smart Grid: A vision for India!”
WHY ?
GTK Grid
Input power : 33KVOutput power : 11KVNumber of buses : 2
Concept of single line diagrams• use a single line to represent all
three phases• standardized schematic symbols
used• do not show the exact electrical
connections
Power Electronics
control and conversion of electric power from one form to another
Circuitry involves combination of power semiconductor
devices and passive components
Power electronic convertor• DC/AC conversion (vice-versa)• AC/AC conversion• DC/DC conversion
used whenever there is a need to change voltage, current or frequency of
electric power
Power range milli – watts to hundreds of megawatts
Classification• AC to DC (rectifier)• DC to AC (inverter)• DC to DC (DC-to-DC converter)• AC to AC (AC-to-AC converter)
DC to DC boost Conversion
•Buck converter (Step- down converter)•Boost converter (Step-up converter)
Bi-positional switch• also known as- a switching power
pole• switches at very high frequencies• require a controlling signal
Vd
L D
C
RL
S
Vd
L D
CRL
S
Vd
LD
C RLS
+ vL
+
Vo
+ vL -
Vo
+
CIRCUIT OF BOOST CONVERTER
CIRCUIT WHEN SWITCH IS CLOSED
CIRCUIT WHEN SWITCH IS OPENED
Vo
+
iL
Boost
(step-up )
converter
Table- States of a bi-positional switchFig. a) Bi-positional switchFig. b) Switching waveform
+
Vo
RL
+ Vce IL
SWITCHING REGULATOR
EQUIVALENT CIRCUIT
Vin
RL
IL
VinVo
+
(ON)closed
(OFF)open
(ON)closed
DT T
OUTPUT VOLTAGE
Vo
SWITCH
Vin
Transistor is operated in switched-mode:
Switch closed: Fully on (saturated)Switch opened: Fully off (cut-off)
When switch is open, no current flow in itWhen switch is closed no voltage drop across it.
Since P=V.I, no losses occurs in the switch.
Power is 100% transferred from source to load.Power loss is zero (for ideal switch):
Switching regulator is the basis of all DC-DC converters
Bi-positional switch using BJT
Boost converter - step up an input voltage ! (a) Circuit,(b) Operating state,
BOOST CONVERTOR: Waveform
Boost Converter Designing
1. Necessary parameters:a. Input voltage range: Vin= 52 VDC (approximation of max. and min. voltages)b. Nominal output voltage: Vout = 225VDCc. Maximum output current: Iomax = 7Ad. Controlling signal frequency of operation = 100K Hz (assumed)
2. Component description:a. Inductor: acts as the magnetic field storage element, it
stores energy in its core material. b. PWM: act as switch controlc. MOSFET: act as switchd. Diode and output capacitor: as output rectifier and filter
block
3. Component Calculations:• Duty Cycle, D = ( Vout – Vin +Vd)/( Vout + Vd - VTswitch)
Vd (Voltage drop across power diode) = 1.15 V
Vtswitch (Voltage drop across power MOSFET) = 3V •ton + toff = 1/f =10us
•D = ton / (ton+toff)•Peak to peak ripple, ∆IL = .2 * Iomax *(Vout / Vin)
•L = (Vout - Vin )* Vin / (∆IL *Vout *fs)
•Cout = Iout * ton / Vripple
Vripple , desired output voltage ripple, assumed 5% of Vout
•R1 = Vout/ Iomax
Calculated values are as follows :•Ton = 7.8 µs , toff = 2.2 µs•∆IL = 6 , Vripple = 11.5 •L= 67 µH•D= 78%•C = 4.7 µF•R1 = 32.5 Ω •R2 = 95 m Ω •Switch Mode Schottky power rectifier-
MBRF20200CTG
CIRCUIT DIAGRAM (simulated using MultiSim)
• Pulse was used to mimic the operation of the control switch
• Attributes of the pulse are listed as follows:
•Initial Value=.2V , •Pulsed Value = 1.5V, •Delay time = 1ns, •Rise time = 10ns,•Fall time = 10ns, •Pulse width = 7.8us, •Period = 10us
•Assumption for the analysis: •All components were assumed
ideal•Power is transmitted without
losses
Waveforms obtaineda. Current across Inductor, L.
b. Depicts current across load resistor, R1.
c. Voltage across load resistor, output voltage
RESULT: The boost circuit was simulated on MultiSim and for a 52V DC input source we obtained 220VDC- 230V DC at
the output port with approximately 6A current flowing through the load.
The training was completed successfully with me entering into unknown realms.
THANK YOU for being patient listeners.