Design of Speed Control circuit for 5 HP DC Motor which based in pulse width modulation technique and feed back for better accuracy using taco generator or optical encoder
Direct currents (DC) motors have been used in variable speed drives for a long
time. The versatile characteristics of dc motors can provide high starting torques which is
required for traction drives. Control over a wide speed range, both below and above the
rated speed can be very easily achieved. The methods of speed control are simpler and
less expensive than those of alternating current motors
index of Design of Speed Control of DC Motor
TITLE CHAPTER (1) (DC MOTOR) PAGE
1.DC MOTOR
1.1 Introduction To Speed Control 10
1.2 Classification Of Dc Motor 11
1.3 Speed Control Of Dc Motor 12
1.4 SPEED CONTROL OF DC SHUNT MOTOR
1.4.1 Flux control method 13
1.4.2 armature/rheostat control method 14-16
1.4.3 Voltage control method 17
1.5 motor applications 18
1.5.1 Shuntmotor 19
1.5.2 series motor 19
1.5.3 Compound motor 20
1.6 project objective 20
TITLE CHAPTER (2)(SWITCHING DEVICE ) PAGE
2. SWITCHING DEVICES AND PWM TECHNIQUE
2.1 Power Semiconductor Devices Classification 22
2.2 Diode 23
2.3 Thyristors 24
2.4 Bipolar Junction Transistor 25
2.5 Power Mosfets 26
TITLE CHAPTER (3) (BUCK CONVERTER TECHNIQUL)PAGE
Buck converter 29
TITLE CHAPTER (4) (EXPERMENTAL WORK) PAGEA Speed control of DC Motor using Buck Converter
5
4.1. circuit diagram 32
4.2 buck converter technique 34
4.2.1 Tthree Phase supply 34
4.2.2 Tthree Phase Transformer 34
4.2.3 Tthree Phase Rectifier 34-36
4.2.4 Capacitor 37
4.2.5 D .C Motor 38
4.2.6 . F.W.D 39
4.2,.7 IGBT 40
4.2.8 IGBT Gate Drive Circuit 41
4.2.9 IGBT Snupper Circuit 42
4.2.10 Principle 43
4.2.11 Pulse Width Modulation 43
4.3 experimental work result 45-54
4.3.1 relationship between Vm and duty cycle 55
4.3.2 relationship between Nm and duty cycle 56
4.3.1 relationship between Vm and Nm 57
CONCLUSION 58
REFERANCES 59
APPENDIXE 60-8
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