Abstract— Many industries attract poly phase induction motors due to its inherent advantages compared to three phase counterpart. The motors works in industries must satisfy the regularity, usability, reliability and efficiency. These parameters implements life time of the motors, with all these parameters the drive system and control system is also very important in driving the five phase induction motor. Most of the researchers concentrate on harmonics, these harmonics degrades the life time of the windings during its working, a study of heat is one of the challenging parameter to improve the life time of the windings of the five phase induction motor, By using different conduction modes harmonics will be reduced. In this paper comparison of temperature at various parts of the motor presented by driving the five phase induction motor with various conduction modes 1800, 1400 will be presented.

Index Terms— Five Phase, Conduction mode, Induction Motor Drive

I. INTRODUCTION In Three-Phase induction Motor when the motor is in

running condition, there are many problems with ripple torque & harmonics. The ripple content can be smoothened by supplying the motor with multi/poly phase supply greater than three phase supply. Selection of even number of phases should be avoided, because it degrades the performance of motor as poles coincide with each other. So, Poly Phase Supply/Odd Phases may be preferred. Five phase induction motor drive is implemented and studied. Earlier multiphase motor were not used widely because of the drawback that the supply for the multi phase motor was not available. With the advancement in power electronics, interest in Multi-phase machine has been increased tremendously as high power electronic devices are used as a switch in voltage source inverter (VSI), intelligent power modules are widely used in industries construct the inverters for poly phase induction motors.[1-5] Inverters are used in small applications to large generators. Many inverter topologies are implemented according to the desired output such as VSI, CSI. Now are inverters are implemented used in single, three phase, poly phase and also in multilevel. But most of inverters employ

common conduction mode i.e. 1800. By varying the conduction modes the performance and harmonic reduction with minimum torque ripple has been studied in this work to obtain better result, with temperature analysis of five phase induction motor.

The harmonic contents generated by power electronic devices have significant and detrimental effect on circuit output. So, THD (Total Harmonic Distortion) should be minimum for reliable operation of any circuit. THD is an important figure of merit for representing the characteristic of any circuit.

Harmonics leads to thermal increase in the motor leads to machine failure therefore prevention of such a failure is crucial for increasing the motor’s lifetime. By knowing the temperature at various parts of the induction motor prevention can be taken to avoid the damage to the induction motor. Heat generated in the stator windings of the induction motor leads to reduction of life time of the motor, to ensure a satisfactory life span for the motor temperature rise must be limited to safe values. Harmonics may cause cables to overheat, damaging their insulation. Motors may also overheat or become noisy and torque oscillations in the rotor can lead to mechanical resonance and vibration. Harmonics can be reduced by modifications to the supply network, drive system and by using external filtering. The current harmonics depend on the drive construction and load.[6-10]

II. FIVE PHASE INDUCTION MOTOR DRIVE The design of five phase induction motor drive with

PWM inverter is as shown in figure 1. By using Voltage frequency method speed can be controlled in five phase Induction motor by using microcontroller.

Five Phase Signals generated by microcontroller to drive the five phase Induction motor. Five phase signals are connected to inverter drive circuit through Optoisolator (MCT2E). IGBT (Insulated-Gate Bipolar Transistor) switches. The control signals with 1800 and 1440 conduction mode is generated to drive the PWM inverter.

Drive converts standard input power (230V, 50Hz) to adjustable voltage and frequency to power AC motor.

Bangalore, India.manjesh1972@gmail.com

Dept. of Electronic ScienceBangalore University,

Dr. Manjesh

Bangalore, India.a.sanand@yahoo.com

Dept. of Electronic ScienceBangalore University

Ananda A S

Study of Five phase Induction motor drive withtemperature analysis at various parts using 144°

Conduction Mode

2014 International Conference on Circuit, Power and Computing Technologies [ICCPCT]

742978-1-4799-2397-7/14/$31.00 ©2014 IEEE

Fig. 1. Five Phase Induction Motor Drive ConstV/f control method is employed to

speed of the five phase induction motor. Tpatterns of 1800 and 1440 are as shown in frespectively. Temperature is measured thermocouples which are placed at various paphase induction motor.

Fig 2. Switching Pattern of 1800 conduction mo

truction o work at low The switching

fig 2 and fig 3 using J-type

arts of the five

ode

Fig 3. Switching Pattern of 14

III. EXPERIME

The Motor which were used inparameters.

Voltage = 200VHp =1Hp Speed =1400 rpFrequency = 50Current =3.2 A

The complete setup is asis operated at low frequency of speed in the motor with a torque lbeen run for 3 hours and tempewith 1800 and 1440 conduction mfig 6 respectively. Table of maximparts of induction motor is as sho

Fig. 4. Complete setup of five

Fig 5. Measurement of temper

induction motor with PWM InverteV=20V, F=5Hz, T

440 Conduction Mode

ENTAL RESULTS n this experiment has these

Volts

pm 0 Hz

s shown in fig 4. The motor f 5 Hz which leads to low load of 0.15 Nm. Motor has erature has been measured

mode as shown in fig 5 and mum temperature at various wn in table 1.

phase induction motor

ature at various parts of five phase er at 1800 Conduction Mode, Torque load=0.15Nm

2014 International Conference on Circuit, Power and Computing Technologies [ICCPCT]

743

Fig. 6. Measurement of temperature at various parts of five phase induction motor with PWM Inverter at 1440 Conduction Mode,

V=20V, F=5Hz, Torque load=0.15Nm

TABLE 1. MAXIMUM TEMPERATURE OF VARIOUS PARTS OF INDUCTION MOTOR AT 1800 AND 1440 CONDUCTION MODE

Induction motor parts

1800 Conduction Mode 1440 Conduction Mode

Top of Stator

Winding 33.14 29.87

Bottom of Stator

Winding 32.94 29.54

Inner Frame 1

32.36 29.47

Inner Frame 2

31.32 28.74

Body 31.12 28.19

Ambient 31.52 28.57

IV. CONCLUSION Study of heat at various parts of five phase induction

motor has been carried out with normal PWM drive 1800 conduction mode and PWM drive with 1440 conduction mode. Harmonics in 1800 conduction mode are more compared to 1440 conduction mode. It is found that the rate of rise of heat in five phase induction motor is found to be less in 1440 conduction mode. The future work may be extended to comparison of 1440 conduction mode with Five Phase Induction motor with Multilevel Inverter.

V. REFERENCE [1] M. Jones and E. Levi, “A literature survey of state-of-the-art in

multiphase ac drives,” in Proc. 37th Int. UPEC, Stafford, U.K., 2002, pp. 505–510.

[2] E. Levi, R. Bojoi, F. Profumo, H. A. Toliyat, and S. Williamson, “Multiphase induction motor drives-A technology status review,” IET Elect. Power Appl., vol. 1, no. 4, pp. 489–516, Jul. 2007.

[3] E. Levi, “Multi-phase machines for variable speed applications,” IEEE Trans. Ind. Electron., vol. 55, no. 5, pp.1893–1909, May 2008.

[4] Shaikh Moinoddin, Atif Iqbal and Elmahdi M. Elsherif, “Five-phase induction motor drive for weak and remote grid system” International Journal of Engineering, Science and Technology Vol. 2, No. 2, 2010, pp. 136-154

[5] “Five-Phase Induction Motor Drive System Fed from Five-Phase Matrix-Converter”, Proceedings of the IEEE 15th International Middle East Power Systems Conference (MEPCON’12), Alexandria University, Egypt, December 23-25, 2012, Paper ID 302, pp 898-903.

[6] ‘AN ADVANCED THREE PHASE VSI WITH 1500 CONDUCTION MODE USING PIC16F72’, Mr. Divyeshkumar G. Mangroliya, Mr. Vinod J. Rupapara, Mr. Rakeshkumar P. Akabari, Mr. Nirav M. Vaghela, JOURNAL OF INFORMATION, KNOWLEDGE AND RESEARCH IN ELECTRICAL ENGINEERING ISSN: 0975 – 6736| NOV 12 TO OCT 13 | VOLUME – 02, ISSUE - 02 Page 352

[7] ‘Design of Renewable energy source based inverter with 1200, 1500 and 1800 mode of conduction with and without filter’, Er. Shivani Dendavey Er. Amol Barve, ISSN: 2278 – 7798 International Journal of Science, Engineering and Technology Research (IJSETR) Volume 2, Issue 3, March 2013

[8] ‘Inverter Design for Improving Output Voltage of Fuel Cell Inverter with Filters’, Ritu Rajan, International Research Journal of Engineering & Applied Sciences, ISSN: 2322-0821, Volume 1, Issue 4, Oct. 2013 – Dec. 2013, Page 01 – 07

[9] ‘Higher Harmonics in Output Voltage of Inverters’, Uhrík Milan, Hüttner Ľudovít, Duč-Anci Michal, Transactions on Electrical Engineering, Vol. 1 (2012), No. 2

2014 International Conference on Circuit, Power and Computing Technologies [ICCPCT]

744