INTERNATIONAL RESEARCH JOURNAL OF ENGINEERING AND TECHNOLOGY (IRJET)
E-ISSN: 2395 -0056
VOLUME: 04 ISSUE: 04 | APR -2017
P-ISSN: 2395-0072
WWW.IRJET.NET
Improved Power Factor of High frequency Switched Single Phase Induction Motor Control Ms. Neha R. Tikhe, Dr. D. R. Tutakne 1PG
Scholar Department of Electrical Engineering Department of Electrical Engineering G.H.Raisoni college of engineering , Nagpur, India 440012 2Professor
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Abstract - To obtain high efficiency and control on power
applications of future energy challenge which has been studied a less expensive integrated drive system. In [4], different capacitors used in different situations, but drawback of this technique is less efficient than other methods. In [6], Adjustable Speed of single phase induction motor drives has been studying various topologies i.e. converter topologies, the adjustable frequency PWM inverter. High Frequency PWM control Technique is used to minimize the above drawbacks of firing angle controlled drives. With High Frequency PWM control drive, power factor (PF) and efficiency of induction motor improves as compared to previously used firing angle controlled drive. In order to further improve the efficiency and power factor the proposed drive scheme is presented. The proposed drive can operate an induction motor with high PF ranging from lagging to leading or even at near unity for speed range required for fans and blowers. This could have been achieved with the help of High Frequency PWM control. The control circuit for the drive is simple and economic. The power circuit of the drive consists of only one semiconductor controllable switch. Experimental results of power factor, displacement factor and total harmonic distortion factor are described and discussed. In order to further improve the efficiency and power factor the proposed drive scheme is presented. The proposed drive can operate an induction motor with high power factor (PF) ranging from lagging to leading or even at near unity for speed range required for fans and blowers. This could have been achieved with the help High Frequency PWM control of single phase motors are driven using the proposed drive, plenty of power conservation is possible.
factor of single phase Induction motor Drive, the proposed High Frequency PWM control technique is presented. Only one semiconductor controlled switch is used. This drive would find utility in Residential and domestic purpose Ceiling fans, blowers and air coolers. The fan draws more current than the required one. This leads to higher I²R Cu losses occurring in the stator of the single phase motor. This motor is expected to draw lesser current at higher input power factor as compared to existing firing angle controlled speed controlled techniques. Proposed drive is expected to provide higher efficiency, high input power factor, low Cu loss and reduced low order harmonics for above applications with simplicity and economy. Keywords - High Frequency, PWM, Power Factor
1. INTRODUCTION Low power Single phase Induction motors are widely used for domestic utility fan motor applications, e.g. Ceiling fans, table fans, air coolers, blowers which are required to run continuously for a long time and also need speed control provision. This project mainly deals with the minimum power consumption by enhancing the efficiency and offering AC Single phase induction motor drive, which are mostly used in residential and domestic purpose. Single phase induction motor is more widely used in the domestic utility than other machines due to their advantages such as simplicity in construction, reliability in operation, and cheapness. The speed control of such motors can be achieved by just controlling the voltage on the motor by the use of power electronic devices. The various control techniques are used for improvement of power factor in the DC converters, and similar to use for ac controller. This technique achieved speed control for regulating the variable AC voltage using an extinction angle control technique [1]. The voltage drop obtains in system impedance then the current flows from the individual harmonic, since the output of the voltage waveform distortion [2]. But this suffers from several disadvantages such as retardation of power factor due to increase in Extinction angle at lower speeds, complex control techniques and number of switches. In [3], the residential Š 2017, IRJET
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Impact Factor value: 5.181
2. POWER CIRCUIT OF THE PROPOSED DRIVE The power circuit of the proposed technique is shown in Fig.1. In this diagram single phase AC supply is connected to Diode bridge rectifier. In this technique, the motor requires variable AC and motor load connected in between single phase AC supply and the input side of the bridge rectifier. The MOSFET is connected across the output terminal of the bridge rectifier which is forward biased. A freewheeling capacitor is connected across the motor terminal to freewheel the AC current through the motor, which is turned off time of the MOSFET switch. The |
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