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Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
ECEN 613
Rectifier & Inverter Circuits
Professor: Dr. P. Enjeti with Michael T. DanielRm. 024, WEBEmail: [email protected]
Textbook: Power Electronics – Converters, Applications & Design (Third edition), by: Ned Mohan et al., John Wiley
COURSE WEBPAGE: http://eCampus.tamu.edu
Module-2b
1
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
Single Phase Diode Rectifier Design
2
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
3
Mode # 1 – Discontinuous Conduction
wtSinEVs .**2=
Equivalent Circuit
VwtSinEdt
diL o −= .**2
Solution i0 =
=
f
o
Lw
E
i
*
*2
πβ ≤
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
4
Range of m:
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
5
Mode # 1 – Discontinuous Conduction πβ ≤
Definitions:
Vbase = Ibase =
m = ……….. (1)
Since Therefore:
….. (3)
VSinE =α.**2
== n
f
o i
Lw
E
i,0
*
*2
mSinE
VSin
11
*2
−− ==α
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
6
Mode # 1 – Discontinuous Conduction πβ ≤
I0,n,av = ……… (4)
I0,n,rms = ……… (5)
Pout = V*Io,av Normalized Power Pn =
Pn = ………….. (6)
Power Factor – PF =
PF = …………… (7)
With these equations plot the graph
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
7
1. Assume a value for – m ------ what is the range for “m” ?
2. Solve for “ α “ from equation (2)
3. Solve for “ β “ from equation (3)
4. Calculate I0,n,av and Io,n,rms from equations (4) and (5)
5. Calculate Pn and PF from equation (6) and (7)
6. Plot: m vs Pn and PF vs Pn
Plot the graph – Procedure
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
8
Variation of Input PF and normalized capacitor voltage ( m ) versus
normalized power ( Pn ) in various modes of rectifier operation.
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
9
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
10
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
11
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
12
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
13
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
14
DC Link Capacitor Design
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
1515
DC Link Capacitor Design
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
16
Design Example - Contd
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
17
Design Example – Cont’d
Dr. Prasad Enjeti, Department of Electrical & Computer Engineering, Texas A&M University
http://www.ece.tamu.edu/People/bios/benjetip.htmlECEN 613Rectifiers & Inverters
18
Voltage doubler rectifier & soft charging during startup