Diagnosis of Air-Gap Eccentricity Fault for Inverter Driven Induction Motor Drives in the Transient Condition
Modelling and Simulation Study of a Helicopter with an External Slung Load System
Comparative Study of Single Phase Power Inverters Based on Efficiency and Harmonic Analysis
Trichotomous Exploratory Data Analysis [Tri–EDA]: A Post Hoc Visual Statistical Cumulative Data Analysis Instrument Designed to Present the Outcomes of Trichotomous Investigative Models
LabVIEW Based Design and Analysis of Fuzzy Logic, Sliding Mode and PID Controllers for Level Control in Split Range Plant
This paper presents the hardware design methodology of digital control systems with different control algorithms. The control system is designed using Xilinx Spartan 3E FPGA, which consists of Analog Capture Circuit, PWM signal generator and other essential modules to control the process. The National Instruments LabVIEW is chosen as the software platform to interface with the FPGA kit. The hardware has been designed to study the Static as well as Dynamic characteristics of DC Motor, with three different control algorithms such as PI,PD and PID. The Ziegler Nichols method has been employed for tuning of controller parameters and the responses of three control algorithms are compared. The novelty in the project has been the measurement of speed, which is done through the design of Timer & Counter using the software, rather then employing the Tachometer, hence reducing the cost.
This paper explains the different Methods of Placement and Installation of Ultrasonic Flow Measuring Instrument on the Pipe of different configuration to extend the linearity range of measurement up to maximum of the input range. Accurate flow measurement is an essential requirement both from qualitative and economic points of view. Among the non contact type of flow measurement, Ultrasonic Flow Measurement (UFM) is widely used to measure flow, because of its advantage like high resolution and less interference of noise on output. However, non linear characteristics of Ultrasonic flow meters have restricted its use [1-2]. But the different arrangement and Installation method helps us to understand, how to linearise the overall system to maximise its full scale range and to make it adaptive to variations in pipe diameter, liquid density, and liquid temperature [3-4]. A flowmeter installed in such a pipeline should indicate the volumetric flowrate correctly and independently of the flow profile. The ultrasonic flowmeter integrates, or averages, the velocity along its measuring paths [8- 11]. Clamp-on transducers eliminate in-line installation, allowing one meter to be used at many locations. For easy installation, no moving parts and no contact between transducer and Fluid is required. Exterior installation eliminates pressure losses and prevents leaking that can be associated with in-line meter installations .
This paper proposes a new concept for monitoring the remote electrical parameters like voltage, current, oil temperature, oil level, active power, reactive power, apparent power, power factor of a remotely located distribution transformer and to transmit it over a communication network and these real time values are displayed using Virtual Instrumentation platform on the PC which is located at the Substation. In addition, it will protect the distribution transformers from various faults like over current and over voltage. Distribution transformers which are the critical components in power distribution systems are located on the feeders of the substation and monitoring of which is a long time need and there is no proper medium for it.
The basic idea is to design a fuzzy logic hysteresis comparator-based direct torque control scheme of an induction motor under varying dynamic conditions. The major problem that is usually associated with DTC drive is the high torque ripple. To overcome this problem a torque hysteresis band with variable amplitude is proposed based on fuzzy logic. The fuzzy logic controller is used to adjust the bandwidth of the torque hysteresis controller in order to reduce the torque and flux ripples and, to improve motor dynamic response,. Based on the slopes of motor-estimated torque and stator current, an FLC is designed to select the optimum bandwidth of the torque hysteresis controller. In order to test the performance of the proposed FLC-based DTC scheme for IM drive, a complete simulation model is developed using MATLAB/Simulink.
The Magnetic levitation system serves as a simple model of devices, which are becoming popular in recent years. Magnetic Levitation System is a nonlinear, unstable system that can be applied in many application area such as in magnetic bearings, high speed trains, vibration isolation tables in semiconductor manufacturing, levitation of wind power generation, levitation of molten metal in induction furnaces, position tracking and levitation of metal slabs during manufacturing. The Magnetic levitation system can be categorized as a repulsive system and this system is based on the source of levitate forces. Since it is highly nonlinear and unstable system, it is very challenging in order to construct the high performance controllers to regulate the position of the levitation ball. This work involves the design of PID controller, Optimized PID controller. The real time implementation on the magnetic levitation kit has been carried out.In the above work, we acquired a high precision control to levitate a steel ball in the desired position.