Baharuddin Ismail

Study of Fuzzy and PI controller for Permanent-Magnet Brushless DC motor drive

This paper presents the study and analysis of the fuzzy and PI control system applying to Permanent-Magnet Brushless DC (BLDC) motor. The most commonly used controller for dc motor controller system is Proportional-Integral (PI) controller. However, the PI controller has some disadvantages such as: high starting overshoot, sensitivity to controller gains and sluggish response due to sudden load disturbance. Further, fuzzy control is proposed and the performance of fuzzy controller was compared with PI controller. Simulation result are presented and analyzed for both fuzzy and PI controllers. It is observed that fuzzy logic based controlled give better responses than traditional PI controller for the speed control of dc motor drives.

State space averaging technique of power converter with digital PID controller

This paper describes a digital Proportional-IntegralDerivative (PID) controller technique applied to the DC-DC buck converter. The converter is modelled using a state space averaging technique. Due to the non-linear of the power converter, the PID controller is designed to simplify the compensation of the DC-DC converter. The control algorithm is implemented in Digital Signal Processor (DSP) TMS320F2812. The steady state and dynamic response performances of the controller are demonstrated. Experimental results are provided to demonstrate the effectiveness of the design.

Implementation of DSP based SPWM for single phase inverter

This paper presents theoretical and experimental aspects related to the implementation of a Digital Signal Processor (DSP) based Sinusoidal Pulse Width Modulation (SPWM) for single phase inverter. Two sinusoidal reference signals complement to each other are compared with a carrier signal to generate PWM signals for the switches. A digital SPWM algorithm is implemented in DSP TMS320F2812 using SIMULINK model constructed from blocks of the C2000 Embedded target Library. The efficiency of the inverter is high and its offers less total harmonic distortion. The proposed system is verified through simulation and is implemented in a prototype, and the experimental results are compared.

Analysis of Fuzzy Logic controller for permanent magnet brushless DC motor drives

This paper presents the analysis of Fuzzy Logic controller for permanent magnet brushless DC motor drive for simulation and experimental results. Initially a fuzzy controller is developed by using MATLAB Fuzzy-Logic Toolbox and then inserted into the Simulink model. The dynamic characteristics of the brushless dc motor such as speed, torque, currents and voltages of the inverter components are easily observed and analyzed by using the developed MATLAB model. The simulation results are compared with TMS320F2808 DSP experimental results. The brushless direct current (BLDC) motor is successfully and efficiently controlled by Fuzzy logic controller.

Effect of unshielded and shielded Rogowski coil sensor performance for partial discharge measurement

This paper presents the analysis of constructed shielded Rogowski coil (RC) sensor for partial discharge (PD) measurement. The RC sensor with rectangular shape has been designed in order to compare the performance unshielded and shielded type in term of sensitivity. Solidwork 3D CAD software has been used to design the core of RC sensor with their casing. Marker Board Replicator 2X 3D printer is used to print the design. An experiment has been conducted to evaluate the difference performance of unshielded and shielded RC sensor with amplitude range PD signal between 1 V to 5 V respectively and the frequency is fixed to 1 MHz. The difference terminating resistance has been installed to the RC sensor too. From the experiment, the percentage average losses of unshielded and shielded RC sensor from 1 V to 5 V at 14.48 % is achieved. The low level of PD signal is challenging to be detected by the RC sensor. The terminating resistance of the coil is a part of parameter which can improve the performance of RC sensor.

Implementation of Fuzzy Logic controller for permanent magnet brushless DC motor drives

This paper presents the analysis of Fuzzy Logic controller for permanent magnet brushless DC motor drive. The brushless direct current (BLDC) motor is efficiently controlled by Fuzzy logic controller compare to the other type of controllers. The dynamic characteristics of the brushless dc motor such as speed, torque, currents and voltages of the inverter components are easily observed and analyzed by using the developed Matlab model. To verify the effectiveness of the controller the simulation results are compared with experimental results.

TMS320F2812 Digital Signal Processor (DSP) implementation of DPWM

This paper presents the programming and use of TMS320F2812 Digital Signal Processor (DSP) in generating the Digital Pulse Width Modulation (DPWM). The structure and functions of eZdsp 2812 board used in this work is explained briefly and the steps need to be taken for the programming is explain in detail to control the frequency, the duty cycle and dead band of the generated PWM. The PWM generated by DSP from programming can be used to control and regulate power electronic converters.

Geometrical Shapes Impact on the Performance of ABS-Based Coreless Inductive Sensors for PD Measurement in HV Power Cables

In this paper, a series of investigations on sensitivity and bandwidth for four types of Rogowski coil (RC) sensors was demonstrated. The proposed RC sensor design using acrylonitrile butadiene styrene material carries the advantages, such as lighter weight, robust, and higher temperature resistance. The prototype development first was carried out with the assistance of Solidwork 3D computer aided design software and MakerBot 2X 3D printer. Subsequently, the sensors were modeled and simulated using electromagnetic transient program-alternative transient program software environment based on the lumped parameter identification. A single-end measuring technique was used to locate the PD signal on the three-phase medium voltage underground cross-link polyethylene insulated power cable with a 240-mm2 nominal area copper conductor. In order to verify the results achieved from the simulation, an experiment was carried out. This experiment was repeated concurrently for each design of the RC sensors. In order to achieve the best PD detection, the precise selection for the best sensor is paramount. In this case, the results indicated that certain geometrical shape performed better with regard to the detection of the PD signal.

Multi-end partial discharge location algorithm based on trimmed mean data filtering technique for MV underground cable

A remarkable challenge in online partial discharge monitoring is to extract desired partial discharge signal from excessive noise caused by the operating cable. Wavelet based de-noising technique can be utilized for noise suppression. However, the wavelet based de-noising techniques ability to fully suppress the non-constant level of noise is limited. Therefore, trimmed mean data filtering technique is applied in partial discharge location algorithm for statistical analysis. In the process of creating trimmed mean partial discharge location algorithm, multi-end partial discharge location algorithm is restructured by adding trimmed mean data filtering technique. Both multi-end partial discharge location algorithm and trimmed mean partial discharge location algorithm had been tested for their performance. In the performance test, noise is modeled and added into the simulated partial discharge signals to enhance the similarity of simulated partial discharge signals with real detected partial discharge signals. Discrete wavelet transform de-noising technique is used for suppressing various level of simulated noise in partial discharge signals. The test result showed that trimmed mean partial discharge location algorithm enhances the accuracy in estimating partial discharge location under noisy environment.

Evaluation of Rogowski coil sensor performance using EMTP-ATP software

Detection and measurement of partial discharge (PD) are important to monitor the insulation life in high voltage (HV) power equipment. This paper presents an electrical detection method which is Rogowski coil (RC) has been chosen as a measuring sensor to detect and measure the PD signal. Series of investigations on sensitivity and bandwidth for four types of RC using electromagnetic transient program-alternative transient program (EMTP-ATP) software was demonstrated. A single-end measuring method is used to locate the PD signal on three-phase MV underground cross-link polyethylene (XLPE) cable with 240 mm2 nominal area of copper conductor cable. An experiment was conducted in order to verify the simulation results. The precise selection of RC sensor based on the simulation and experimental results was compared with the previous design of researchers in term of sensitivity and bandwidth. In this case, result indicated that the new design of RC sensor performed better plays a vital role in detecting PD signal.