Module-2b ECEN 613 Rectifier & Inverter Circuits · ECEN 613 Rectifier & Inverter Circuits...

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: enjeti@tamu.edu

michael.t.daniel@tamu.edu

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