Bài giảng Electrical and electronic principles: Chương 1 - ThS. Ngô Quốc Cường

Những nội dung chính được trình bày trong chương này gồm: Signal and Image processing, machine learning, multisim software, Kirchoff''s Current Law(KCL) and Kirchoff''s Voltage Law (KVL), circuit analysis. Mời các bạn cùng tham khảo.

TRƯỜNG ĐẠI HỌC SƯ PHẠM KỸ THUẬT

TP HỒ CHÍ MINH

ELECTRICAL AND ELECTRONIC PRINCIPLES

WEEK 1

CONTENTS

• INTRODUCTION

• MULTISIM Software

• Review: Kirchoff's Current Law(KCL) and Kirchoff's Voltage

Law (KVL)

• Circuit analysis

INTRODUCTION

• Research interest: Signal and Image processing; Machine

learning

• MAIL: cuongnq@hcmute.edu.vn

• Sites:

https://sites.google.com/a/hcmute.edu.vn/ngoquoccuong/

1 Starting: MULTISIM

• Analyses

Multisim offers you

many analyses, all of

which use simulation

to generate the data

for the analysis you

want to perform

Review

• Branch: represents a single

element such as a voltage

source or a

resistor

• Node: the point of

connection between two or

more branches

• Loop: any closed path in a

circuit

2 Kirchhoff’s Laws

• Ohm’s law by itself is not sufficient to

analyze circuits

• Kirchhoff’s laws were first introduced in

1847 by the German physicist Gustav

Robert Kirchhoff (1824–1887)

•

2 Kirchhoff’s Laws

• Kirchhoff’s current law (KCL) states that the algebraic sum of currents entering (or leaving) a node (or a closed boundary)

is zero

where N is the number of branches connected to the node

and is the nth current entering (or leaving) the node

2 Kirchhoff’s Laws

• Kirchhoff’s voltage law (KVL) states that the algebraic sum of all voltages around a closed path (or loop) is zero

• where M is the number of voltages in the loop (or the

number of branches in the loop) and is the mth voltage

2 Kirchhoff’s Laws

• Find the voltages v1 and v2

Exercise 1.1

• Find v1 and v2

• Answer: v1= 16 V; v2= -8 V

Exercise 1.2

• Using MultiSim to solve exercise 1.1

Exercise 1.3

Exercise 1.3

• Solution:

Exercise 1.4

Exercise 1.4

• Using KVL

Exercise 1.5

• Find currents and voltage in the circuit below

• Answer:

Exercise 1.5

Solution

• By Ohm’s law:

Exercise 1.6

• Find the currents and voltages in the circuit below

• Answer: