Shamsul Aizam Zulkifli

Investigation of field excitation switched flux motor with segmental rotor

In this paper a three-phase field excitation switched flux (FESF) motor where both armature coil and field excitation (FE) coil placed on the stator is investigated. The rotor is design with separately segmental pole so that flux generated from FE Coil can be fundamentally placed in adjacent with flux of armature coil. Thus, the coil end length of both FE Coil and armature coil are reduced, hence increasing the motor efficiency when compared with FESF motor with single piece rotor, and overlapped FE Coil and armature coil windings. In this paper design investigation and analysis of 12S-8P and 24S-10P FESF motor with segmental rotor are investigated. Moreover, coil test analysis, FE Coil flux characteristics, flux interaction between FE Coil and armature coil, flux distribution, and torque characteristics are also compared. As conclusion, the 24S-10P FESF motor with segmental rotor gives much higher performance when compared with 12S-8P FESF motor.

Investigation on Various Voltage Controllers for 3 Phase Rectifier Using Arduino as a Low Cost Microcontroller

This paper focuses on investigation of various voltage controllers which are the Proportional Integration Derivative (PID) control and P-Resonant control in order to observe the efficiency of the low cost microcontroller such as Arduino for the gating signals generation. Both of the controllers have been selected due to the availabality of the block diagrams that can be build in the MATLAB. The MATLAB-Simulink block will be used as the interface between the design controller to the Arduino board before downloaded into Arduino. The results show, the Arduino is able to operate from various controllers but it gives better result when the P-Resonant controller has been used.

MATLAB-Arduino as a low cost microcontroller for 3 phase inverter

This paper presents the performance of the Arduino microcontroller board in response to an advanced control strategy for a motor control application. Two set of control theories have been used and combined as known as the Proportional Integration (PI) - Repetitive controller. This controller has been designed in MATLAB-Simulink environment and then downloaded to the Arduino for testing. The test set consists of 3 phase inverter, filter, induction machine (IM) and a set of current controller. The feedback current from the IM will be the control parameter for the controller and the Arduino in order to generate the pulse width modulation (PWM) pattern. Different PWM pattern is generated when the feedback current is changing due to the changing of the load.

Design investigation of three phase HEFSM with outer-rotor configuration

Flux switching machines (FSMs) with the advantages of single piece of rotor and robust rotor structure become a popular research topic in recent years that suitable for various speed conditions. This machine combined the advantages of Switched Reluctance Machines (SRMs) and Permanent Magnet Synchronous Machines (PMSMs). Previously, most of developed FSMs are mainly focused on inner-rotor configuration, and hard to find research on outer-rotor FSM configuration. Therefore, this paper presents design investigation of three phase Hybrid Excitation Flux Switching Machine (HEFSM) with outer-rotor configuration. Primarily, design processes of the outer-rotor HEFSM especially for drawing parts, materials and conditions used, and properties setting are described in detail. Next, coil arrangement tests are also evaluated to confirm the principle operation of the machine and the phase sequence of each armature coil. Finally, DC field excitation flux capabilities at various current density condition, flux path and flux distribution, back-emf voltage and initial torque are also investigated.

H ∞ speed control for Permanent Magnet Synchronous Motor

This paper describes the H∞ control design for robust speed control for the Permanent Magnet Synchronous Motor. The speed feedback control is used to maintain the speed during load changing. Due to the load changing it will create the disturbance to the motor. To solve this problem the H∞ control theory has been used to determine the robustness of the controller and to have good tracking performance for the speed. The model and the controller value have been developed in MATLAB/Simulink where the results show the controller able to maintain the speed despite the load is changed.

Artificial neural network controller for single-phase active power filter

This paper shows the conception and simulation of a single-phase shunt active power filter for harmonics and power factor compensation of uncontrolled rectifier with battery load. The objectives of this project are to minimize the harmonic distortion and intensity the power factor of the single-phase system with battery charger load. The design of shunt active power filter is verified using the simulations in Matlab/Simulink. Shunt active harmonic filter was controlled by the neural network method where it applied the proportional and integral method in order to adjust the direct current link voltage and the hysteresis current controller is employed to generate signals for switching the voltage source inverter. The error signal has been compensated using the controllers. The reference filter currents signal is obtained by subtracting the line current with the compensated signal from the controller. This reference current is fed to the hysteresis current controller and compare with the sensed filter currents to obtain the switching signal for active power filter. Simulation results are acquired with the conventional PI controller and ANN controller.

The DC converter control for deceleration profile in energy recovery from landing aircraft

This paper discuss about the H∞control strategy for DC converter in the energy recovery from landing aircraft. The energy from landing aircraft can be changed to electrical energy by using several power electronics converters combine with the linear generator. To have this effect the controllers must able to control the mechanical and electrical outputs. The mechanical outputs are such as the force, speed of the linear generator while the electrical outputs are the voltage and current. By using the H∞ control strategy at the specific location especially at the converter side it hopes that all the outputs stated above can be controlled. The goals for this paper are to maintain the dc voltage value at the converter and to have constant deceleration speed and force at the linear generator in order to change the kinetic energy from landing aircraft to electrical energy. All the models and the simulations have been done in MATLAB software package.

Linear generator models in simulink block

This paper introduces the model of linear generator in 3 phase analysis and in dq transformation. The linear generator is used to compare the synchronous generator because the source of the input is changing from torqueto the force. As known, force flows along the direction of the moving object. This linear generator model will use speed as the moving source to generate electricity at the output terminal. The model of the linear generator has been modeled in a simulink block diagram in MATLAB. Matlab program has been used because of its simplicity and it is easy to assemble the model. The output can be change from un-control to control source by connecting the power electronics devices such as dc-dc converter, rectifier and inverter after the linear generator model. At the end of this paper it shows the results for both models that can be used to understand more about the linear generator generation.

Cascaded buck-boost converters: Output voltage regulation & constant inductor current

This paper proposes a robust control to the cascaded buck-boost converter for AC-DC applications. The controller model has been developed using the state-space averaging technique and the H∞ control theory. These concepts are used to achieve regulated output voltage and at the same time it gives constant current at the inductor. The controller strategy is included with two loops controls which are the output voltage and inductor current control. Both controllers were designed using H∞ control theory. The simulation results show that the controllers are able to respond to the desired target output and has constant inductor current.

DC-DC interleaved boost converter using FPGA

This paper presents the design of dc to dc Interleaved Boost Converter (IBC) which is controlled using Field Programmable Gate Array (FPGA). The output voltage can be controlled by Pulse Width Modulation (PWM) switching technique which is implemented on the Altera DE2-70 Board. An eight bit Analog to Digital Converter circuit is used to monitor the output current. The simulation is carried out using Matlab Simulink software and simulation on the designed waveform is conducted using Quartus II software tools. The frequency of the PWM output voltage is set to 40 kHz. Various detailed analysis has been done to investigate the benefits of IBC compared to conventional boost converter. Meanwhile, theoretical analysis and hardware prototype has been done to validate the result.