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Design of embedded based three phase preventor and selector system for industrial appliances
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Design of embedded based three phase preventor and selector system for industrial appliances

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  • 1. INTERNATIONAL JOURNAL OF ELECTRONICS AND International Journal of Electronics and Communication Engineering & Technology (IJECET), ISSN 0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 1, January- February (2013), © IAEMECOMMUNICATION ENGINEERING & TECHNOLOGY (IJECET)ISSN 0976 – 6464(Print)ISSN 0976 – 6472(Online)Volume 4, Issue 1, January- February (2013), pp. 183-188 IJECET© IAEME: www.iaeme.com/ijecet.aspJournal Impact Factor (2012): 3.5930 (Calculated by GISI) ©IAEMEwww.jifactor.com DESIGN OF EMBEDDED BASED THREE PHASE PREVENTOR AND SELECTOR SYSTEM FOR INDUSTRIAL APPLIANCES Ms. YOGITA V. BHAGWAT Prof. S. A. NAVEED yogita_6@rediffmail.com sa_naveed01@rediffmail.com J.N.E.C. Aurangabad J.N.E.C. Aurangabad ABSTRACT Designing and implementing commercial as well as industrial system based on power electronics has been a prominent field of interest among many researchers and developer. This paper present an implementing methodology for Three phase preventor and selector system. In this paper, preventor and selector system interface with microcontroller 89c51 to control and drive the various domestic and industrial appliances. Keywords: RYB indicator, automatic phase selector circuit, MOSFET based inverter, microcontroller 89c51, induction motor. 1. INTRODUCTION In this exponential development world, 85% appliances are work on three phase supply. Failure of any one phase from this three phase, appliance may be damaged.. This paper is build system that can support one of the phase supplies with the help of existing phase supply. The development of system will be achieved by using microcontroller which is being programmed using IC89c51. Now day’s electric supply has become one of the basic need but due to Environmental conditions and practical limitation the generation of electricity is Insufficient hence to fulfill the Electricity requirement load shading is used, but is not satisfying the complete requirement. Inverter is used to obtain A.C. supply from battery. .Cost of three-phase inverter, which is available in market is more. 183
  • 2. International Journal of Electronics and Communication Engineering & Technology (IJECET), ISSN0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 1, January- February (2013), © IAEMEThe system provide the safety operations for industry application. 1. Safety of operation through microcontroller unit. 2. Safety of people and plant. 3. To ensure quality product at reasonable cost and quantity. 4. To satisfy environmental regulations. 5. To satisfy the economics. Fig: 1Block diagram of system2. SYSTEM ARCHITECTURE The block diagram consists of DIP switch, microcontroller, signal amplifier, invertercircuitry, opto isolator gate drive power supply, 200V unregulated power supply MOSFETinverter, switches2.1.1 RF CHOCKIt consists of capacitor and inductor connected in parallel. Inductor has ability to resist abruptchanges in supply frequency due to which high voltage pulses are removed. Capacitor bypasses AC and blocks DC. Any DC component present in AC is removed. The output of RFchoke filter is given to step down transformer.2.1.2 DIP SWITCHESDIP switches are used as input to the microcontroller 89C51. The DIP switches are consist of8 parallel switches; they are used as follows. SWITCH 1: To turn on or off the whole DIP. SWITCH 2: it is used to select the 120 and 180 deg. mode of inverter. SWITCH 3: MASKED. SWITCH 4: MASKED. SWITCH 5, 6, 7, &8: Used to generate variable frequency. The output of the DIP switches is given to the port 1 of microcontroller 89C51 is used toselect the appropriate frequency as well as to select the mode of operation. 184
  • 3. International Journal of Electronics and Communication Engineering & Technology (IJECET), ISSN0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 1, January- February (2013), © IAEME2.1.3 MICROCONTROLLER The microcontroller 89c51 is used to generate six pulses PWM output in both 120 and 180deg. Mode The output of DIP switches is accepted on input port that is port 1 and isprocessed and transferred on output port to display the six-pulse PWM waveform. Each timean interrupt is generating when particular time period of the frequency selected from DIPswitches.2.1.4 OPTOISOLATORThe output of microcontroller that is six pulses is given to the input of 6 Optoisolatorseparately. Isolates the control circuitry from the power circuitry. The coast of controlcircuitry; to avoid this problem the control circuit and power circuit will damage the controlcircuitry are isolated from each other.2.1.5 SIGNAL AMPLIFIERThe output of opto coupler is not sufficient for driving the MOSFET so amplification ofsignal is required. The Darlington pair TIP 122 is used which amplifies the signal such thatsufficient to drive MOSFET circuitry. The Darlington transistor is mainly used to amplify thecurrent which is required by the mosfet for operation.2.1.6 INVERTER CIRCUITORY The inverter circuitry consisting of power device named as MOSFET; they are connected inthe bridge configuration MOSFET stands for metal oxide semiconductor for filled effecttransistor which having many advantages other power device like MOSFET, FET and SCR.The 300V DC power supply is given to inverter circuitry and is converted into the 110 V ACsupply. The output of inverter is can be obtained in either 180deg or 120 deg depending onthe users requirement In the 120deg mode phase voltage waveform is quasi square while linevoltage is of six step waveform. In 180deg mode the phase voltage is of six step waveformwhile line voltage waveform is quasi square waveform.2.1.7 OPTOISOLATOR GATE DRIVE POWER SUPPLY The 230V AC 50 Hz is given to the primary winding of the transformer. The secondarywinding of the transformer is divided into four winding of the transformer is divided into fourwinding among which one is connected to the three separate bridge rectifier circuits. Thesecondary turns of the transformer are reduced to have 12V AC at the secondary winding.The 12V AC is further given to the rectifier circuitry to convert it into 10 V DC. This voltageis further given to opto isolator for its proper operation.2.1.8 MOSFET BASED INVERTERThe D.C. supply to the inverter is derived from single phase 230 VA.C. Mains supply. Herein lies the beauty of the inverter; it provides total isolation of the input supply and output tothe motor, allowing us to operate a three phase induction motor on a single phase supply. Insystem such as electrical vehicles where energy generated Is stored in large battery array, wecan replace the A.C. supply- rectifier- filter assembly by a battery and battery chargerassembly [1]2.1.9 SPEED CONTROL OF THREE PHASE MOTOR Various methods are available for control of speed of a motor. These techniques takeadvantage of various aspects of motor operation [2] briefly, the methods are; 185
  • 4. International Journal of Electronics and Communication Engineering & Technology (IJECET), ISSN0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 1, January- February (2013), © IAEMEPhase controlled motor drive: This technique involves the control of the phase angle ofsupply voltage. A slip energy recovery scheme is used along with this to improve the driveefficiencyFrequency controlled motor drive: This method involves changing synchronous speed bychanging frequency of a.c. supply to motor to cause speed variation, as the true speed of themotor is very close to synchronous speed. Either voltage source inverters or current sourceinverters may be used. This project is based on a voltage source inverter using this method ofspeed control.Vector controlled motor drive: Independent control over flux and torque is possible in A.C.drives, as is possible in D.C. drives. The control is achieved by phasor control of rotor fluxlinkages. Vector control, or alternatively, field oriented control is achieved by suitablycontrolling the inverter to obtain correct values of frequency, phase, and current and hencecontrol the flux phasor. This control technique has made A.C. drives superior to D.C. drives,as vector control drives provide independent control of flux and torque is improved dynamicresponse in compare Fig 2: Three Phase appliance protector Automatic phase selector circuit select any one phase from main three phase supply . . Thecomplete circuit of a three Phase appliance protector is described here. It requires three-phasesupply, three 12V relays and a timer IC NE555 along with 230V coil contactor having fourpoles. Relays RL1 and RL2 act as a sensing devices for phases Y and B, respectively.These relays are connected such that each acts as an enabling device for thesubsequent relay. Therefore the combination of the relays forms a logical AND gateconnected serially. The availability of phase R energies relay RL1 and its normally-opened (N/O) contacts close to connect phase Y to the input of transformer X2. Theavailability of phase Y energies relay RL2 and its N/O contacts close to connect phase B tothe input of transformer X3, thus applying a triggering input to timer IC NE555 (IC1).Therefore the delay timer built around NE555 triggers only when all the phases (R, Y and B)are avail- able. It provides a delay of approximately four seconds, which energiesRelay RL3 and its N/O contact closes to connect the line to the energizing coil of four-polecontactor relay RL4. Contactor RL4 closes to ensure the availability of the three-phase supply 186
  • 5. International Journal of Electronics and Communication Engineering & Technology (IJECET), ISSN0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 1, January- February (2013), © IAEMEto the appliance. The rating of contactor RL4 can be selected according to the full-load current ratingof the appliances. Here the contact current rating of the four-pole contactor is up to 32A. Theavailability of phases R, Y and B is monitored by appropriate LEDs connected across the secondarywindings of transformers X1, X2 and X3, respectively. Hence this circuit does not require a separateindicator lamp for monitoring the availability of the three phases. When phase R is available, LED1glows. When phase Y is available, LED2 glows. When phase B is available, LED3 glows. The mainadvantage of this protector circuit is that it protects three-phase appliances from failure of any of thephases by disconnecting the power supply through the contactor and automatically restores thethree-phase supply to the appliance (with reasonable time delay) when all the phases are available.3. EXPERIMENTAL RESULT Fig.4: TP1, TP2, TP3, TP4, TP5, TP6 – R, Y, B Phase Outputs of 89c51 Fig. 5: Control Pulse Fig. 6: RYB phase output of inverter with respect to neutral 187
  • 6. International Journal of Electronics and Communication Engineering & Technology (IJECET), ISSN0976 – 6464(Print), ISSN 0976 – 6472(Online) Volume 4, Issue 1, January- February (2013), © IAEME4. CONCLUSION Using microcontroller we can operate different industrial operation in relation withtheir time using Three phase preventor and selector system. The system has significantexcellences such as continue supply and low expenses.5. REFERENCES1] T. Hori, H. Nagase, and M. Hombu,” Induction Motor control system”, Industrialelectronics Handbook J.D. Irwin, pp.310-315.CRC Press, 19972]. P.N Enjeti and A.Rahman, “A New Single-Phase to Three Phase Converter with ActiveInput Current Shaping for Low Cost Ac Motor Drives”, in conf.Rec.IEEE-IAS AnnuMeeting, pp. 935 – 939, 19833]. P.N Enjeti and A.Rahman, “A New Single-Phase to Three Phase Converter with ActiveInput Current Shaping for Low Cost Ac Motor Drives”, in conf.Rec.IEEE-IAS AnnuMeeting, pp. 935 – 939, 19834] A.B. Plunkett, “ A current controlled PWM inverter drives”, IEEE IASAnnu. Meet. Conf.Rec ., pp.785-792,19795] Austin H. Bonnet: “Analysis of the impact of pulse-width modulated inverter voltagewaveforms on AC induction motors”; IEEE Trans-IAMar/Apr. 1996 pp.386-3926]. K.Ranj i th kumar , S.Pal ani swami ,D.Sakthibal a, “Efficiency Optimization of InductionMotor Drive Using Soft Computing Techniques”, International Journal of ComputerApplications, Vol. 3,No.1, pp. 6-12, June 20107] Microcontrollers & Embedded System Designs,http://www.ucdevelopers.page.tl/8] J. Holtz. Pulse width Modulation for Electronic PowerConversion. Proc. of the IEEE, Vol.82, No.8 pp. 1194 –1213, Aug 19949] B.K.Bose ,Power Electronics and variable frequency drives, IEEE press,NY,199610] Malesani, L.; Tenti, P.,Three-Phase AC/DC PWM Converter with Sinusoidal ACCurrents and Minimum Filter Requirements, IEEE Transactionson Industry Applications,Vol. IA-23, No.1, January/February1987.11] B. Wu, S.B Dewan and G.R.Slemon ,”PWM CSI Inverter for induction motor drives ,”IEEE Trans. On Ind. Appl., Vol.22, pp.1052-1072, Nov./dec.198612]International Standard s for all electrical, electronic and related technologies available athttp://www.iec.ch13] P.H. Zope, Prashant Sonare, Avnish Bora And Rashmi Kalla, “Simulation AndImplementation Of Control Strategy For Z-Source Inverter In The Speed Control OfInduction Motor” International Journal of Electrical Engineering & Technology (IJEET),Volume 3, Issue 1, 2012, pp. 21 - 30, Published by IAEME.14] Vaibhav B. Magdum, Ravindra M. Malkar and Darshan N. Karnawat, “Study &Simulation Of Direct Torque Control Method For Three Phase Induction Motor Drives”International Journal of Electrical Engineering & Technology (IJEET), Volume 2, Issue 1,2011, pp. 1 - 13, Published by IAEME. 188