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Open Access
Investigation of the performance of three phase induction motor under non sinusoidal supply voltages
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2019-09) Kaushik, Deepak; Srivastava, Ajay
According the electric power research in 1995, 35- 40% of all electric power flow through electronics converters. That used of electronics devices increased year by year. All the electronic converters are the non- linear load and they generate the harmonics. Harmonics affects the power supply, it affects the voltage, current, and frequency of the power supply and power supply become distorted. The distorted power supply affects the performance of all connected devices. Induction motor is mostly used machine in industrial area as well as commercial area. Induction motor performance also affected by the distorted supply, therefore the study about the performance parameter of induction motor like torque, speed, power factor, torque ripple, losses, efficiency etc. under the distorted supply on MATLAM/SIMULINK. SIMULATION give the quick analysis of the performance parameter, under the positive, negative, and mix harmonics to check the performance of motor under different loading condition. At harmonic contain supply under full load condition efficiency and power factor was increasing with decreasing in harmonic voltages. That observation is same for positive, negative and mix harmonics. But the change is very minor in efficiency and power factor. Speed does not vary with harmonics supply. Ripple is constant for all load at different harmonics. Losses increase due to the harmonics contain supply.
Open Access
Simulation & comparison of various control strategies for BLDC motor and experimental analysis of BLDC motor using FPGA controller
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2018-08) Singh, Pawan; Srivastava, Ajay
Brushless DC (BLDC) motor belongs to the class of special electrical machines. Brushless DC motors offer many attractive features like low maintenance, good fault tolerant properties, fast response, noiseless operation, high efficiency, high power density, good reliability and compact construction. As a result, the brushless DC motors are increasingly being used in military, industrial and commercial applications. Its market is rapidly expanding. Since the development of motor, problems were encountered for variable speed but in last decade the continuing technological development in power electronics, microprocessors, adjustable speed drivers, semiconductor chips, have combined to provide reliable and efficient operation at varying loads and varying speeds. In BLDC motors the speed of motor drops with load so the prime objective of closed loop control is to maintain the motor speed constant irrespective of load changes. So closed loop is necessary in applications that demands better control and constant speed. The speed of the motor is fed back and compared with the reference speed continuously. Performance of BLDC motor depends on two factors. The performance of BLDC motor depends on two factors one is design of BLDC motor and second is the control strategies. Various types of control strategies have been proposed in the past for studying the behaviour of the BLDC motor during normal and transient periods. This thesis comprises of two parts. First part deals with simulation and comparison of various control strategies with reference to speed, torque and current response under different loading conditions at different speeds. Simulations were performed in MATLAB/Simulink software. Simulation results concluded that at rated speed, fastest speed control was achieved with PWM control strategy. Second part deals with experimental analysis of BLDC motor using FPGA controller in order to gain better understanding of motor performance and drive system. FPGA controller provided gate pulse for inverter switches based on PWM technique. For experimental analysis 1 HP Out-runner type BLDC motor was run at different speeds under different load and corresponding stator voltages, currents, power factor were measured with the help of FLUKE power logger and efficiency was calculated. Highest efficiency of 88.75 % was achieved at rated speed of 1800 RPM.
Open Access
Performance investigation of three phase induction motor drive by vector control strategy using Matlab/Simulink
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2018-08) Sharma, Rahul; Swami, A.K.
Vector Control or field orientation control (FOC) and Direct Torque Control are becoming the industrial standards for induction motor control. The FOC technique decouples the two components of stator current: one providing the control of flux and the other providing the control of torque. The flux as well as the torque level of the machine is controlled with perpendicular components of the stator current vector in the synchronously rotating reference frame (SRRF). Thus a current control loop is usually realized which controls the stator current and calculates the necessary inverter switching states. In Direct torque control to achieve the decoupling of flux and torque components, the flux and the torque errors are processed in hysteresis controller. The inverter switching states necessary to achieve the flux and torque levels are then directly obtained from a switching table with the stator flux angle as additional input. The motor torque and flux become direct controlled variables and hence, the name — Direct Torque Control. This thesis work gives a contribution for a detailed analysis of between the two control techniques, emphasizing upon the advantages and disadvantages respectively. The performance of the two control schemes is evaluated based on various criteria including the complexity of control and the dynamic performance. The dynamic response of FOC and direct torque control under various operating conditions such as no load, step load, fan load is simulated and examined in MATLAB 2016 environment.
Open Access
Design optimization and performance simulation of permanent magnet synchronous motor
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2018-07) Gope, Deepayan; Goel, S.K.
Open Access
Modelling and simulation of matrix converter using space vector modulation techniques
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2018-08) Misra, Sudheeksha; Arora, Sudha
In today’s world there is a demand for intelligent power supply systems for different industrial applications and for fulfilment of all these modernization needs the industries require a different types of intelligent power converter for their process and hence, AC to AC power converter are becoming essential for the industrial applications. This conversion is usually done using the traditional converter consisting of rectifier and inverter linked by a storage element normally the electrolytic capacitor which makes the converter bulky and reduces the reliability of the system. Hence, to overcome this drawback, Matrix Converters are gaining the researchers attention as an alternative to the traditional converters. The Matrix converter is the most versatile converter and has many advantages over the other converters such as it directly convert AC to AC without any dc link, has compact design, bi-directional power flow capability, generate high quality desired waveform. In this thesis the fundamental of Matrix Converter, its switching conditions and the different bi-directional switches which are used in Matrix Converter are discussed. The Matrix Converter has many modulation techniques invented up till now but the most efficient is the Space Vector Modulation technique, In the terms of the Matrix Converter, the Space Vector Modulation technique is of two types Direct Space Vector Modulation and Indirect Space Vector Modulation and both the Direct and Indirect space vector modulation have been discussed in detail in this work with its implementation using the MATLAB/Simulink environment and from the results and analysis it has been concluded that the Indirect Matrix Converter has higher THD for input and output currents as compare to the Direct Matrix Converter.
Open Access
Design, modelling and fault analysis of induction motor drive system using ANSYS
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2018-08) Sharma, Rajat; Singh, Rajiv
Induction motors have wide applications in industries by virtue of its reliability, efficiency, robustness, self-starting capability and low cost. With rapid developments in power electronics over the past few years, the 3-ɸ induction motor has acquired a unique place in the variable speed application drives. The PWM-VSI fed 3-ɸ induction motor drives have pioneered in industrial applications for variable speed operations such as traction, robotics, aeronautics and railway. The fast switching, high efficiency, simple gate signal commutations control and ability to manage high short-circuit current of power switches like IGBT have created wide applications of VSIs for the drives. However, these IM drives are prone to different types of faults like IGBT switch short-circuit and open circuit fault. On an approx. nearly 53% failures occur in the control circuit while 38% failures are majorly associated with the power components of variable speed drives. Thus, it becomes crucial to investigate the complete design, modelling and fault analysis of the IM drive system. This thesis presents a comprehensive performance analysis of PWM-VSI fed IM drive system under normal and fault operation. This work is an attempt to encompass various aspects of design, modelling, simulation and analysis of the IM drive circuit. Typical cases of IGBT open-circuit and short-circuit faults have been analysed in the proposed work. The 7.5 kW prototype of SCIM has been designed in RMxprt and Maxwell 2D design tools for finite element analysis. While the SPWM controlled inverter circuit has been designed in the Simplorer design tool. The Maxwell 2D motor model and Simplorer circuit design are then co-simulated in order to investigate the performance of the open-loop drive system and analysis of the open-circuit and short-circuit faults in inverter IGBT.
Open Access
Simulation, control and fault analysis of 6/4 switched reluctance motor drive using MATLAB
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2018-08) Singh, Mukul; Saxena, Ravi
The Switched Reluctance Motor is quite popular due to its low cost, simple construction, robustness, high operating speeds and high fault tolerant capabilities. Switched Reluctance machines have gained popularity during the past four decades and a rapid development of SRM led to its wide-spread industrial applications. The modelling, simulation and fault analysis of Switched Reluctance Motor under different operating conditions is necessary to investigate the fault tolerant behaviour of SRM. This thesis presents a comprehensive performance analysis of SRM drive under fault and abnormal operating conditions. This work is an attempt to encompass various aspects of modelling, simulation, analysis and control. The hysteresis current controller is used to limit current within the reference values and the fuzzy logic speed controller is used to provide speed control at reference values with minimum torque ripples. Typical cases considered are: converter device short circuit, converter device open circuit fault and motor terminal short circuit faults. Pre fault conditions are taken under no load and the performance parameters under fault conditions are speed, torque, rise time, flux and current. The response of torque, current, speed and flux are compared under different normal and abnormal/fault conditions to illustrate the fault tolerant characteristics of the SRM drive system under dynamic operating conditions. A 6/4 Switched Reluctance Motor is used in present study and the MATLAB/Simulink environment is used to simulate the model of SRM drive system.
Open Access
Modeling and simulation of a solar photovoltaic system based DC microgrid
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-08) Varshney, Deepti; Saxena, Ravi
Open Access
Grid interactive SPV power generation and control using MATLAB/SIMULINK
(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2016-08) Juyal, Vikas Deep; Arora, Sudha

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