Analysis, design and control of power factor correction converters fed permanent magnet brushless DC motor drives

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ANALYSIS, DESIGN AND CONTROL OF POWER FACTOR CORRECTION CONVERTERS FED PERMANENT MAGNET

BRUSHLESS DC MOTOR DRIVES

SANJEEV SINGH

Electrical Engineering Department

Thesis Submitted

in fulfillment of the requirements of the degree of DOCTOR OF PHILOSOPHY

to the

INDIAN INSTITUTE OF TECHNOLOGY DELHI

DECEMBER 2010

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CERTIFICATE

It is certified that the thesis entitled "Analysis, Design and Control of Power Factor Correction Converters Fed Permanent Magnet Brushless DC Motor Drives," being submitted by Mr. Sanjeev Singh for award of the degree of Doctor of Philosophy in the Department of Electrical Engineering, Indian Institute of Technology Delhi, is a record of the students own work carried out by him under my supervision and guidance. The matter embodied in this thesis has not been submitted for award of any other degree or diploma.

Dated:31.12. 2010 (Prof. Bhim Singh)

Electrical Engineering Department Indian Institute of Technology Delhi New Delhi-110016, INDIA.

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ACKNOWLEDGEMENTS

I wish to express profound gratitude and indebtedness to Prof. Bhim Singh for providing me an opportunity to carry out the Ph.D. work under his supervision. His sagacity and vision have played a very important role in guiding me throughout this study. Working under him has been a wonderful experience, which has provided a deep insight to the world of research.

Continuous monitoring, craving to new ideas and time management of Prof. Bhim Singh were inspiration for me to complete this work. His consistent encouragement for excellence has actuated me to improve my work and use best of my capabilities to complete the work with excellence.

My sincere thanks are due for Prof. J.K. Chatterjee, Prof. T.S. Bhatti and Dr. G.

Bhuvaneswari, all SRC members for their valuable guidance and consistent support during my research work.

I wish to convey my sincere thanks to Prof. B.P. Singh, Prof. S. S. Murthy, Prof. K.R.

Rajagopal and Dr. M. Nabi for their valuable inputs during my course work which helped me to enrich my knowledge. I am grateful to IIT Delhi for providing the research facilities.

Thanks are due to Shri Gurcharan Singh, Sh. Srichand, Sh. Puran Singh, Sh. Jagbir Singh and other staffs of PG Machines Lab., IIT Delhi for providing me the facilities and assistance during this work.

I must thank Sant Longowal Institute of Engineering and Technology (SLIET), Longowal, Punjab, India and All India Council of Technical Education (AICTE) for providing me an opportunity under quality improvement programme (QIP). I am grateful to the staffs of QIP section, PG section, Central library, Electrical Engineering Department for their valuable co- operation.

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I am grateful to all my colleagues and staff at SLIET Longowal for their co-operation and particularly to Dr. A.S. Arora, Dr. V.K. Jain, Dr. S. Marwaha, Dr. B.K. Kanungo, Dr.

Jatinder Madan, Dr. Amanpreet Singh, Dr. R.K. Saxena, Dr. Vikas Rastogi, Mr. J.S. Gill, Mr. Indraj Singh, Mr. Charanjiv Gupta, Mr. M.S. Manna, Ms. Surita Maini, Mrs. Pratibha Tyagi, Dr. P.C. Upadhyay, Mr. Naveen Kaushley, Dr. Vikas Nanda and Mr. Gulshan Jawa.

The support of Dr. B.C. Sarkar and Mrs. Shukla Sarkar deserves heartfelt thanks.

I am extremely grateful to all my friends and well wishers, particularly I would like to extend my sincere thanks to Dr. S. K. Dwivedi, Dr. Gaurav Kumar Kasal, Dr. S. Gairola, Dr.

R. Saha, Mr. P. Jayaprakash, Mr. D. Madan Mohan, Mr. V. Rajagopal, Mr. Ram Niwas, Mr.

Jeevanand, Mr. P. Murli Krisna, Mr. Kanwar Pal Tomar, Mr. Sarsing Gao, Mr. Rajesh Ahuja, Mr. Priyesh Chauhan, Mr. Upender Gupta, Mr. S.R. Arya, Mr. N.K.S. Naidu, Mr. M.

Sandeep, Mr. M. Rajesh and Mr. Arun Verma for their valuable assistance and co-operation.

The unconditional support from Mr. Ashish Srivatsava, Mr. Shailendra Sharma and family is a lifetime achievement for me. How can I forget my badminton game partners, Mr. V.N.

Tandon, Mr. V. Ramesh Babu, Mr Arpit and Mr. Kiran, who supported and inspired me to be fit during my stay at IIT Delhi. I am also grateful to those who have directly or indirectly helped me to complete my thesis work.

The patience, encouragement and firm support of my mother Mrs. Madhuri Singh and my wife Mrs. Pravina Singh earns deepest love and appreciation, without their support this work could not be completed. The patience of my kids Srijan and Sukrit, has given me a consistent support to perform under adverse situations. My sisters Mrs. Anju and Mrs. Neetu were always there to support me and how can I forget the contributions of Mr. Chakradhar Singh and Mr. Manoj Parmar, my brother-in-laws who have always provided the moral supports and enthusiasm during this work. My in-laws Mr. R.P. Singh and Mrs. Durga Singh

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were always inspirational and supportive. Mr. Pranay Singh, Mr. Hanumant Singh and Mrs.

Prerna Singh have been a silent supporter under every condition.

This acknowledgement cannot end without expressing sincere thanks to my respected Aunt Mrs. Sushila Singh who has supported and guided my family throughout my stay at IIT Delhi.

At last, I am beholden to almighty for their blessings to help me to raise my academic level to this stage. I pray for their benediction in my future endeavors. May their blessings be showered on me for strength, wisdom and determination to achieve in future also.

Date :

Place : New Delhi Sanjeev Singh

(2007EEZ8203)

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ABSTRACT

In the quest of energy efficiency improvement, researchers have developed many new electrical machines and permanent magnet brushless DC motors (PMBLDCMs) are one of them. Their high efficiency, silent operation, compact size, high reliability and low maintenance features make them a suitable choice for many industrial, commercial and domestic applications. The advancement in geometries and design innovations has made possible the use of PMBLDCMs in any shape and size to fit many of the domestic, commercial and industrial applications. At present, PMBLDCMs are finding applications in diverse fields such as household appliances, automobiles, transportation, aerospace equipments, power tools, toys, healthcare equipments, sophisticated position control applications and medium size industrial drives.

This research work aims on the power factor correction in the PMBLDCM drive for various low power applications with speed control. The PMBLDCM requires a three-phase voltage source inverter (VSI) to be operated as an electronic commutator based on the rotor position signals of the PMBLDCM obtained using Hall effect sensors. The three-phase VSI of the PMBLDCM drive (PMBLDCMD) is fed from a single-phase AC mains through a diode bridge rectifier followed by a smoothening DC capacitor, which draws an uncontrolled charging current resulting in a pulsed current from AC mains, thereby, many power quality (PQ) disturbances arise at AC mains such as poor power factor (PF), increased total harmonic distortion (THD) of AC mains current and its high crest factor (CF). Moreover, various international standards such as IEEE 519, IEEE 1159 and IEC 61000-3-2 impose strict limitations on the harmonic current emissions by various loads. Therefore, power factor correction (PFC) converter based drive is essential for a PMBLDCM in most of small rating domestic and commercial applications.

The selection of a PFC converter for feeding PMBLDCMD needs emphasis on conformity to the PQ norms, cost, and performance of the controllers. There are many DC-DC converter topologies available which can be used as PFC converters such as buck, boost and buck boost converters with single switch, two-switch and four-switch converters with and without high frequency transformer to name a few, forward, flyback, Cuk, SEPIC, Zeta, Push-pull, Half-bridge and Full-bridge converters. The mostly used control schemes for PFC converters are current multiplier control with continuous conduction mode (CCM) and voltage follower control in discontinuous conduction mode (DCM) of operation. The current

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multiplier control uses average current control strategy and yields good results as compared to the voltage follower control. However, the voltage follower control requires less number of sensors and has reduced control complexity.

In this research work, analysis, design and control of PFC converters for improvement of power quality at AC mains are aimed for a

PMBLDCMD.

The other major emphasis of the investigation is on simple control, reduced number of sensors and circuit components, leading to reduction in overall cost. A wide range of PFC converter configurations for

PMBLDCMs

are analyzed, designed and their performance is simulated for various applications. For the possibility of sensor reduction in the existing PFC converter fed

PMBLDCMD,

a novel

DC

link voltage control scheme is analyzed, designed and implemented to demonstrate effective speed control of the

PMBLDCM

along-with improvement in PQ at AC mains. These PFC converters are further investigated in

DCM

operation with possible reduction of various sensors for

PMBLDCMD.

A digital signal controller

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dsPIC 30F6010 is used for validation of simulated performance on a 2 hp, 5.2 Nm rated

PMBLDCM.

It is an easy to use and low cost controller design platform which suits the requirements of

PMBLDCMDs

in various applications. Test results have validated the simulation results while performing speed control and PFC control from a single processor. The

DC

link voltage control scheme has evolved out of this research work for the speed control of

PMBLDCM

which has resulted in reduction of sensors in the

PMBLDCMD

and has consistently shown improved power quality at AC mains in wide range of speed and input AC voltage.

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3.2 Classification of PFC Converter Topologies for PMBLDCMD 28 3.2.1 Classification Based on Isolation in PFC Converters 28 3.2.2 Classification Based on Voltage Ratio in PFC Converters 29 3.2.3 Classification Based on Number of Switches in PFC Converters 29 3.2.4 Classification Based on DC Link Voltage in PFC Converters 30 3.2.5 Classification Based on Operation of PFC Converters 30 3.3 Configurations of PFC Converters for PMBLDCMD 30 3.3.1 Non-isolated Buck PFC Converter fed PMBLDCMD with 31

Constant DC Link Voltage

3.3.2 Non-isolated Boost PFC Converter fed PMBLDCMD with 31 Constant DC Link Voltage

3.3.3 Non-isolated Buck Boost PFC Converter fed PMBLDCMD with 32 Constant DC Link Voltage

3.3.4 Non-isolated Buck PFC Converter fed PMBLDCMD with 32 Variable DC Link Voltage

3.3.5 Non-isolated Buck Boost PFC Converter fed PMBLDCMD with 33 Variable DC Link Voltage

3.3.6 Isolated Buck PFC Converter fed PMBLDCMD with Constant 33 DC Link Voltage

3.3.7 Isolated Boost PFC Converter fed PMBLDCMD with Constant 33 DC Link Voltage

3.3.8 Isolated Buck Boost PFC Converter fed PMBLDCMD with 34 Constant DC Link Voltage

3.3.9 Isolated Buck PFC Converter fed PMBLDCMD with Variable 35 DC Link Voltage

3.3.10 Isolated Buck Boost PFC Converter fed PMBLDCMD with 36 Variable DC Link Voltage

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3.4 Control Strategies for PFC Converter fed PMBLDCMDs 36 3.5 Comparative Features of Various Configurations 37 3.6 Rating Considerations of PFC Converters fed PMBLDCMD 37

3.7 Conclusions 38

CHAPTER IV MODELING AND IMPLEMENTATION OF 39-57 PMBLDCMD

4.1 General 39

4.2 Configuration and Operating Principle of PMBLDCMD 39

4.2.1 120° Conduction Mode 40

4.2.2 PWM Current Control Mode 41

4.3 Modeling of The PMBLDCMD 41

4.3.1 Speed Controller 42

4.3.2 Reference Winding Current Generator 43

4.3.3 PWM Current Controller 43

4.3.4 Voltage Source Inverter 43

4.3.5 PMBLDC Motor 44

4.4 MATLAB Simulation Model of PMBLDCMD 46

4.5 Hardware Implementation of PMBLDCMD 47

4.5.1 Development of Signal Conditioning Circuits for Current Sensors 47 4.5.2 Development of PWM Signal Isolation and Amplification Circuit 48 4.5.3 Development of Current Control Algorithm on dsPIC 3OF6010A 49 4.5.4 Hardware Implementation of DBR-DC Capacitor —VSI fed 50

PMBLDCM

4.6 Results and Discussion 50

4.6.1 Performance of PMBLDCMD during Starting 51 4.6.2 Performance of PMBLDCMD during Load Perturbation 52 4.6.3 Performance of PMBLDCMD under Speed Control 53 4.6.4 Power Quality Performance of CCPMBLDCMD 53

4.7 Conclusions 56

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CHAPTER V NON-ISOLATED BUCK PFC CONVERTER FED 58-72 PMBLDCMD WITH CONSTANT DC LINK

VOLTAGE

5.1 General 58

5.2 Configurations of Non-isolated Buck PFC Converter Fed PMBLDCMD 58 5.3 Analysis and Design of Non-isolated Buck PFC Converter Fed 59

PMBLDCMD

5.4 Modeling of Non-isolated Buck PFC Converter Fed PMBLDCMD 60

5.4.1 DC Link Voltage Controller 61

5.4.2 Reference Input Current Generator 61

5.4.3 PWM Current Controller 61

5.4.4 PWM Controller for Voltage Follower Scheme 62

5.4.5 PMBLDCM Drive 62

5.5 MATLAB Simulation Model of Non-isolated Buck PFC Converter Fed 62 PMBLDCMD

5.6 Hardware Implementation of Non-isolated Buck PFC Converter Fed 62 PMBLDCMD

5.6.1 Development of Voltage and Current Sensors with Signal 63 Conditioning Circuits

5.6.2 Development of PWM Signal Isolation and Amplification Circuit 64 for Buck PFC Converter

5.6.3 Development of Zero Crossing Detector for Generation of Unit 65 Template of Input Voltage

5.6.4 Development of PFC Control Algorithm on dsPIC 30F6010A 66

5.6.4 Hardware Implementation of PMBLDCMD 66

5.7.1 Performance of CCPMBLDCMD during Starting 69 5.7.2 Performance of Non-isolated Buck PFC Converter fed 69

CCPMBLDCMD under Speed Control

5.7.3 Power Quality Performance of Non-isolated Buck PFC Converter 69 fed CCPMBLDCMD

5.8 Conclusions 72

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CHAPTER VI NON-ISOLATED BOOST PFC 73-80 CONVERTER FED PMBLDCMD WITH

CONSTANT DC LINK VOLTAGE

6.1 General 73

6.2 Configurations of Non-isolated Buck PFC Converter Fed PMBLDCMD 73 6.3 Analysis and Design of Non-isolated Boost PFC Converter Fed 74

PMBLDCMD

6.4 Modeling of Non-isolated Boost PFC Converter Fed PMBLDCMD 75 6.5 MATLAB Simulation Model of Non-isolated Boost PFC Converter Fed 76

PMBLDCMD

6.7 Conclusions 80

CHAPTER VII NON - ISOLATED BUCK-BOOST PFC 81-101 CONVERTERS FED PMBLDCMD WITH

CONSTANT DC LINK VOLTAGE

7.1 General 81

7.2 Configurations of Non-isolated Buck-boost PFC Converter Fed 81 PMBLDCMD

7.3 Analysis and Design of Non-isolated Buck-Boost PFC Converters Fed 84 PMBLDCMD

7.3.1 Non-isolated Buck-Boost PFC Converter Fed PMBLDCMD 84 7.3.2 Non-isolated Cuk PFC Converter Fed PMBLDCMD 85 7.3.3 Non-isolated SEPIC PFC Converter Fed PMBLDCMD 86 7.3.4 Non-isolated Zeta PFC Converter Fed PMBLDCMD 86 7.4 Modeling of Non-isolated Buck-Boost PFC Converter Fed PMBLDCMD 87 7.5 MATLAB Simulation Models of Non-isolated Buck-Boost PFC 87

Converters Fed PMBLDCMD

7.6 Hardware Implementation of Non-isolated Buck-Boost PFC Converters 88 Fed PMBLDCMD

7.7.1 Performance during Starting and Speed Control 90 7.7.2 PQ Performance during Speed Control and Input Voltage 93

Variation

7.8 Conclusions 101

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CHAPTER VIII ISOLATED BUCK PFC CONVERTERS FED 102- PMBLDCMD WITH CONSTANT DC LINK 123 VOLTAGE

8.1 General 102

8.2 Configurations of Isolated Buck PFC Converters Fed PMBLDCMD 103 8.3 Analysis and Design of Isolated Buck PFC Converter Fed PMBLDCMD 105 8.3.1 Isolated Forward Buck PFC Converter Fed PMBLDCMD 105 8.3.2 Isolated Push-pull Buck PFC Converter Fed PMBLDCMD 106 8.3.3 Isolated Half Bridge Buck PFC Converter Fed PMBLDCMD 107 8.3.4 Isolated Full Bridge Buck PFC Converter Fed PMBLDCMD 108 8.4 Modeling of Isolated Buck PFC Converter Fed PMBLDCMD 109 8.4.1 Isolated Forward Buck PFC Converter Fed PMBLDCMD 109 8.4.2 Isolated Push-pull Buck PFC Converter Fed PMBLDCMD 110 8.4.3 Isolated Half Bridge Buck PFC Converter Fed PMBLDCMD 110 8.4.4 Isolated Full Bridge Buck PFC Converter Fed PMBLDCMD 111 8.5 MATLAB Simulation Model of Isolated Buck PFC Converter Fed 112

PMBLDCMD

8.6 Results and Discussion 113

8.6.1 Performance during Starting and Speed Control 114

8.6.2 PQ Performance during Speed Control and Input Voltage 115 Variation

8.7 Conclusions 122

CHAPTER IX ISOLATED BOOST PFC CONVERTERS 124- FED PMBLDCMD WITH CONSTANT DC 148 LINK VOLTAGE

9.1 General 124

9.2 Configurations of Isolated Boost PFC Converters Fed PMBLDCMD 125 9.3 Analysis and Design of Isolated Boost PFC Converter Fed PMBLDCMD 127 9.3.1 Isolated Forward Boost PFC Converter Fed PMBLDCMD 127 9.3.2 Isolated Push-pull Boost PFC Converter Fed PMBLDCMD 129 9.3.3 Isolated Half Bridge Boost PFC Converter Fed PMBLDCMD 130 9.3.4 Isolated Full Bridge Boost PFC Converter Fed PMBLDCMD 131 9.4 Modeling of Isolated Boost PFC Converter Fed PMBLDCMD 131

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9.4.1 Isolated Forward Boost PFC Converter Fed PMBLDCMD 132 9.4.2 Isolated Push-pull Boost PFC Converter Fed PMBLDCMD 132 9.4.3 Isolated Half Bridge Boost PFC Converter Fed PMBLDCMD 133 9.4.4 Isolated Full Bridge Boost PFC Converter Fed PMBLDCMD 133 9.5 MATLAB Simulation Models of Isolated Boost PFC Converter Fed 133

PMBLDCMD

9.6 Results and Discussion 136

9.6.1 Performance of Isolated Boost PFC Converters Fed 136 PMBLDCMD during Starting and Speed Control

9.6.2 Power Quality Performance of Isolated Boost PFC Converters 137 Fed PMBLDCMD

9.6.3 Performance of Isolated Boost PFC Converters Fed 139 PMBLDCMD under Input Voltage Variation

9.6.4 Performance of Isolated Boost PFC Converters Fed 142 PMBLDCMD with Voltage Follower Control

9.7 Conclusions 148

CHAPTER X ISOLATED BUCK-BOOST PFC 149- CONVERTERS FED PMBLDCMD WITH 173 CONSTANT DC LINK VOLTAGE

10.1 General 149

10.2 Configurations of Isolated Buck-Boost PFC Converters Fed PMBLDCMD 150 10.3 Analysis and Design of Isolated Buck-Boost PFC Converters Fed 152

PMBLDCMD

10.3.1 Isolated Buck-Boost (Flyback) PFC Converter Fed PMBLDCMD 152 10.3.2 Isolated Cuk (Buck-Boost) PFC Converter Fed PMBLDCMD 153 10.3.3 Isolated SEPIC (Buck-Boost) PFC Converter Fed PMBLDCMD 154 10.3.4 Isolated Zeta (Buck-Boost) PFC Converter Fed PMBLDCMD 154 10.4 Modeling of Isolated Buck-Boost PFC Converters Fed PMBLDCMD 155 10.5 MATLAB Simulation Models of Isolated Buck-Boost PFC Converter Fed 156

PMBLDCMD

10.6 Hardware Implementation of Isolated Buck-Boost PFC Converter Fed 158 PMBLDCMD

10.7.1 Performance of Isolated Buck-Boost PFC Converters fed 159 PMBLDCM during Starting

10.7.2 Performance of Isolated Buck-Boost PFC Converters fed 160

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PMBLDCM under Speed Control

10.7.3 Power Quality Performance of Isolated Buck-Boost PFC 163 Converters fed PMBLDCMD

10.7.4 Performance of Isolated Buck-Boost PFC Converters Fed 165 PMBLDCMD under Input Voltage Variation

10.7.5 Performance of Isolated Buck-Boost PFC Converters Fed 167 PMBLDCMD with Voltage Follower Control

10.8 Conclusions 172

CHAPTER XI NON-ISOLATED BUCK PFC CONVERTER 174- FED PMBLDCMD WITH VARIABLE DC 189 LINK VOLTAGE

11.1

General 174

11.2 Configurations of Non-Isolated Buck PFC Converters Fed PMBLDCMD 175 with Variable DC link Voltage

11.3 Analysis and Design of Non-isolated Buck PFC Converter Fed 175 PMBLDCMD with Variable DC link Voltage

11.4 Modeling of Non-isolated Buck PFC Converter Fed PMBLDCMD with 176 Variable DC link Voltage

11.4.1 Voltage Reference Generator 177

11.4.2 Rate Limiter 177

11.4.3 Non-isolated Buck PFC Converter Fed PMBLDCMD with 178 Current Multiplier Control

11.4.4 Non-isolated Buck PFC Converters Fed PMBLDCMD with 179 Voltage Follower Control

11.4.5 Electronic Commutator 179

11.5 MATLAB Simulation Model of Non-isolated Buck PFC Converter Fed 179 PMBLDCMD with Variable DC link Voltage

11.6 Hardware Implementation of Non-isolated Buck PFC Converter Fed 180 PMBLDCMD with Variable DC link Voltage

11.6.1 Development of Variable Voltage Algorithm on dsPIC 30F6010A 181 11.6.2 Hardware Implementation of Non-isolated Buck PFC Converter 181

fed PMBLDCMD

11.7.1 Performance of Non-Isolated Buck PFC Converters fed 182 PMBLDCM during Starting

11.7.2 Performance of Non-Isolated Buck PFC Converter fed 182 PMBLDCM under Speed Control

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11.7.3 Power Quality Performance of Non-Isolated Buck PFC Converter 185 fed PMBLDCMD

11.7.4 Performance of Non-Isolated Buck PFC Converter Fed 185 PMBLDCMD under Input Voltage Variation

11.7.5 Performance of Non-Isolated Buck PFC Converter Fed 186 PMBLDCMD with Voltage Follower Control

CHAPTER XII NON - ISOLATED BUCK-BOOST PFC 190 -

CONVERTERS FED PMBLDCMD WITH 214 VARIABLE DC LINK VOLTAGE

12.1 General 190

12.2 Configurations of Non-Isolated Buck-Boost PFC Converters Fed 191 PMBLDCMD with Variable DC link Voltage

12.3 Analysis and Design of Non-isolated Buck-Boost PFC Converter Fed 193 PMBLDCMD with Variable DC link Voltage

12.3.1 Non-isolated Buck-Boost (Flyback) PFC Converter Fed 194 PMBLDCMD

12.3.2 Non-isolated Cuk PFC Converter Fed PMBLDCMD 194 12.3.3 Non-isolated SEPIC PFC Converter Fed PMBLDCMD 194 12.3.4 Non-isolated Zeta PFC Converter Fed PMBLDCMD 195 12.4 Modeling of Non-isolated Buck-Boost PFC Converters Fed PMBLDCMD 195

with Variable DC link Voltage

12.4.1 Non-isolated Buck-Boost PFC Converters Fed PMBLDCMD 196 with Current Multiplier Control

12.4.2 Non-isolated Buck-Boost PFC Converters Fed PMBLDCMD 196 with Voltage Follower Control

12.5 MATLAB Simulation Models of Non-isolated Buck-Boost PFC Converter 197 Fed PMBLDCMD with Variable DC link Voltage

12.6 Hardware Implementation of Non-isolated Buck-Boost PFC Converter Fed 199 PMBLDCMD with Variable DC link Voltage

12.7 Results and Discussion 199

12.7.1 Performance of Non-Isolated Buck-Boost PFC Converters fed 200 PMBLDCM during Starting

12.7.2 Performance of Non-Isolated Buck-Boost PFC Converters fed 202 PMBLDCM under Speed Control

12.7.3 Power Quality Performance of Non-Isolated Buck-Boost PFC 204 Converters fed PMBLDCMD

12.7.4 Performance of Non-Isolated Buck-Boost PFC Converters Fed 208

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PMBLDCMD under Input Voltage Variation

12.7.5 Performance of Non-Isolated Buck-Boost PFC Converters Fed 209 PMBLDCMD with Voltage Follower Control

CHAPTER XIII ISOLATED BUCK PFC CONVERTERS FED 215- PMBLDCMD WITH VARIABLE DC LINK 239 VOLTAGE

13.1 General 215

13.2 Configurations of Isolated Buck PFC Converters Fed PMBLDCMD with 216 Variable DC link Voltage

13.3 Analysis and Design of Isolated Buck PFC Converters Fed PMBLDCMD 218 with Variable DC link Voltage

13.3.1 Isolated Forward Buck PFC Converter Fed PMBLDCMD 218 13.3.2 Isolated Push-pull Buck PFC Converter Fed PMBLDCMD 219 13.3.3 Isolated Half Bridge Buck PFC Converter Fed PMBLDCMD 220 13.3.4 Isolated Full Bridge Buck PFC Converter Fed PMBLDCMD 221 13.4 Modeling of Isolated Buck PFC Converters Fed PMBLDCMD 222 13.4.1 Isolated Forward Buck PFC Converter Fed PMBLDCMD 223 13.4.2 Isolated Push-pull Buck PFC Converter Fed PMBLDCMD 223 13.4.3 Isolated Half Bridge Buck PFC Converter Fed PMBLDCMD 223 13.4.4 Isolated Full Bridge Buck PFC Converter Fed PMBLDCMD 224 13.5 MATLAB Simulation Models of Isolated Buck PFC Converter Fed 225

PMBLDCMD with Variable DC link Voltage

13.6.1 Performance of Isolated Buck PFC Converters Fed PMBLDCMD 227 during Starting

13.6.2 Performance of Isolated Buck PFC Converters Fed PMBLDCMD 228 during Speed Control

13.6.3 Power Quality Performance of Isolated Buck PFC Converters Fed 229 PMBLDCMD

13.6.4 Performance of Isolated Buck PFC Converters Fed PMBLDCMD 232 during Input AC Voltage Variation

13.6.5 Performance of Isolated Buck PFC Converters Fed PMBLDCMD 234 with Voltage Follower Control

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CHAPTER XIV ISOLATED BUCK-BOOST PFC 240- CONVERTERS FED PMBLDCMD WITH 268 VARIABLE DC LINK VOLTAGE

14.1 General 240

14.2 Configurations and Operating Principle of Isolated Buck-Boost PFC 241 Converters Fed PMBLDCMD with Variable DC link Voltage

14.3 Analysis and Design of Isolated Buck-Boost PFC Converters Fed 243 PMBLDCMD with Variable DC link Voltage

14.3.1 Isolated Buck-Boost (Flyback) PFC Converter Fed PMBLDCMD 243 14.3.2 Isolated Cuk PFC Converter Fed PMBLDCMD 243 14.3.3 Isolated SEPIC PFC Converter Fed PMBLDCMD 244 14.3.4 Isolated Zeta PFC Converter Fed PMBLDCMD 244 14.4 Modeling of Isolated Buck-Boost PFC Converters Fed PMBLDCMD with 244

Variable DC link Voltage

14.4.1 Isolated Buck-Boost PFC Converters Fed PMBLDCMD with 245 Current Multiplier Control

14.4.2 Isolated Buck-Boost PFC Converters Fed PMBLDCMD with 246 Voltage Follower Control

14.5 MATLAB Simulation Models of Isolated Buck-Boost PFC Converter Fed 247 PMBLDCMD with Variable DC link Voltage

14.6 Hardware Implementation of Isolated Buck-Boost PFC Converter Fed 248 PMBLDCMD with Variable DC link Voltage

14.7.1 Performance of Isolated Buck-Boost PFC Converters fed 250 PMBLDCM during Starting

14.7.2 Performance of Isolated Buck-Boost PFC Converters fed 250 PMBLDCM under Speed Control

14.7.3 Power Quality Performance of Isolated Buck-Boost PFC 257 Converters fed PMBLDCMD

14.7.4 Performance of Isolated Buck-Boost PFC Converters Fed 261 PMBLDCMD under Input Voltage Variation

14.7.5 Performance of Isolated Buck-Boost PFC Converters Fed 263 PMBLDCMD with Voltage Follower Control

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CHAPTER XV MAIN CONCLUSIONS AND FUTURE 269-

SCOPE OF WORK 275

15.1 General

15.2 Main Conclusions

15.3 Suggestions for Further Work

REFERENCES

APPENDICES

LIST OF PUBLICATIONS

BIO DATA

269 270 274

Analysis, design and control of power factor correction converters fed permanent magnet brushless DC motor drives