Improved design and control of brushless doubly-fed reluctance machine generators for wind power applications. The growing importance of the reduction in greenhouse gas emissions over the coming years is driving the increased usage of renewable energy sources such as wind power. Currently the cost of wind energy is considerably higher than fossil fuel energy sources. Part of the reason for this is the initial cost and ongoing maintenance of the wind turbines. The proposed research considers a n ....Improved design and control of brushless doubly-fed reluctance machine generators for wind power applications. The growing importance of the reduction in greenhouse gas emissions over the coming years is driving the increased usage of renewable energy sources such as wind power. Currently the cost of wind energy is considerably higher than fossil fuel energy sources. Part of the reason for this is the initial cost and ongoing maintenance of the wind turbines. The proposed research considers a new kind of generator based on the Brushless Doubly Fed Machine (BDFRM) that has the potential to lower the initial cost of the generator/inverter hardware of the wind turbine, and also decrease the ongoing maintenance costs. If the research is able to show that the BDFRM is able to realise its potential, then this will aid the further use of wind energy.Read moreRead less
A high performance, robust and sensorless Natural Field Oriented controller for induction machine drives. Natural Field Orientation (NFO) is a technique of field oriented control of AC machines that is potentially very robust, able to operate at low speeds, and inherently sensorless. However, it is a little known fact that under regenerative conditions the algorithm is unstable. The primary aim of this project is to develop a NFO algorithm that is stable under regeneration, and has minimum depen ....A high performance, robust and sensorless Natural Field Oriented controller for induction machine drives. Natural Field Orientation (NFO) is a technique of field oriented control of AC machines that is potentially very robust, able to operate at low speeds, and inherently sensorless. However, it is a little known fact that under regenerative conditions the algorithm is unstable. The primary aim of this project is to develop a NFO algorithm that is stable under regeneration, and has minimum dependence on machine parameters. If these aims are achieved the NFO algorithm would be a significant addition to control algorithms for AC machines, allowing their use in a broader range of applications.
Read moreRead less
A Segmented Interior Permanent Magnet Synchronous Motor for Wide Field Weakening Range and its Sensorless Control using Improved Flux Estimators. Australia has the world's second largest reserve (after China) of high energy-density permanent magnet (neodymium-iron-boron) material for the IPM motor. The present limitation of the machine to be driven sensorless over a wide speed range with field weakening is believed to be holding back its widespread use in applications other than servo-type which ....A Segmented Interior Permanent Magnet Synchronous Motor for Wide Field Weakening Range and its Sensorless Control using Improved Flux Estimators. Australia has the world's second largest reserve (after China) of high energy-density permanent magnet (neodymium-iron-boron) material for the IPM motor. The present limitation of the machine to be driven sensorless over a wide speed range with field weakening is believed to be holding back its widespread use in applications other than servo-type which requires high-resolution mechanical sensors. Extension of the motor speed range by a combination of magnetic system design (for large field weakening range), and sensorless position and flux estimation with sufficient accuracy for fast dynamic control should lead to large scale adoption of this motor, and hence to significant improvement in energy efficiency and market share for Australia.Read moreRead less
Improvements of Direct Torque Controllers for the Interior Permanent Magnet Synchronous Motor. The Direct Torque Control (DTC) strategy has recently been applied successfully to the interior permanent magnet (IPM) motor which offers the highest torque/volume and efficiency of all known machines. Exploitation of the recently developed Neodynium-Iron-Boron material, of which Australia is the world's second largest producer, in the IPM motor and of new sensorless control strategies such as the DTC ....Improvements of Direct Torque Controllers for the Interior Permanent Magnet Synchronous Motor. The Direct Torque Control (DTC) strategy has recently been applied successfully to the interior permanent magnet (IPM) motor which offers the highest torque/volume and efficiency of all known machines. Exploitation of the recently developed Neodynium-Iron-Boron material, of which Australia is the world's second largest producer, in the IPM motor and of new sensorless control strategies such as the DTC controller, promises to open vast application potentials, such as in the upcoming hybrid and totally electric automobiles, for these motors. The new DTC controller developed at UNSW shows high promise for delivering a high-performance, sensorless IPM motor drive. This project aims to investigate, and overcome, the remaining problems of this technique.Read moreRead less
Optimum rotor and concentrated stator-winding structures for improving the torque, field-weakening and power-density characteristics of interior permanent-magnet machines. The successful completion of this project will deliver one of the most energy efficient and compact motor which will meet the expectations of future electric and hybrid electric vehicles. The current generation of surface Permanent Magnet (PM) and Interior Permanent Magnet (IPM) motors are not optimized in terms of compactness ....Optimum rotor and concentrated stator-winding structures for improving the torque, field-weakening and power-density characteristics of interior permanent-magnet machines. The successful completion of this project will deliver one of the most energy efficient and compact motor which will meet the expectations of future electric and hybrid electric vehicles. The current generation of surface Permanent Magnet (PM) and Interior Permanent Magnet (IPM) motors are not optimized in terms of compactness, energy-density and efficiency, and torque characteristics. Australia has the world's second largest reserve of the magnet material for IPM machines. It also has a significant niche industry for specialized machine design. These twin advantages should offer Australia huge potential benefits in the world market for electric and hybrid electric vehicles and for substantial reduction in our dependence on importing petrol and greenhouse gas emissions.Read moreRead less
Characterisation of amorphous metal materials. This project aims to develop in-depth understanding of magnetisation mechanisms and accurate characterisation of amorphous metal materials for effectively designing advanced transformers. This project expects to generate new knowledge in the area of property understanding and modelling of advanced soft magnetic materials through extensive theoretical and experimental studies on material samples and transformer prototypes. The intended outcome is hig ....Characterisation of amorphous metal materials. This project aims to develop in-depth understanding of magnetisation mechanisms and accurate characterisation of amorphous metal materials for effectively designing advanced transformers. This project expects to generate new knowledge in the area of property understanding and modelling of advanced soft magnetic materials through extensive theoretical and experimental studies on material samples and transformer prototypes. The intended outcome is high-frequency high-power-density transformers, which are crucial in many distributed renewable energy systems. The project would significantly benefit Australian manufacturing industry at the high-end market.Read moreRead less
Robust control of spatially distributed uncertain systems. This project is aimed at studying the problem of robust control of spatially distributed uncertain systems. This is an important area of research that has attracted extensive interest in recent years. This is mainly due to the introduction of new technologies such as MEMS and Smart Structures with capabilities such as distributed sensing and actuation. This research will establish a framework for the modeling of Uncertainly in the mathe ....Robust control of spatially distributed uncertain systems. This project is aimed at studying the problem of robust control of spatially distributed uncertain systems. This is an important area of research that has attracted extensive interest in recent years. This is mainly due to the introduction of new technologies such as MEMS and Smart Structures with capabilities such as distributed sensing and actuation. This research will establish a framework for the modeling of Uncertainly in the mathematical descriptions of spatially distributed systems and the design of robust control methodologies capable of maintaining robust closed loop stability as well as guaranteeng robust performance of the closed loop system.Read moreRead less
Application Oriented System Level Optimum Design Method for Advanced Electrical Drive Systems. The new concept of application-oriented, integrated, system level design will relieve the constraints formerly applied to appliances by motors and give appliance designers full freedom to pursue the best appliance functions. The new platform will become a powerful tool for designing advanced drive systems of new materials, novel topologies, low cost and high performance, and shorten significantly the p ....Application Oriented System Level Optimum Design Method for Advanced Electrical Drive Systems. The new concept of application-oriented, integrated, system level design will relieve the constraints formerly applied to appliances by motors and give appliance designers full freedom to pursue the best appliance functions. The new platform will become a powerful tool for designing advanced drive systems of new materials, novel topologies, low cost and high performance, and shorten significantly the period of new product development. This will enhance tremendously the competitiveness of Australian industry. The energy savings achieved by using efficient systems will contribute significantly towards the reduction of greenhouse gas emission. High quality PhD and honours degree students will be trained.Read moreRead less
EMERGENCY CONTROL FOR POWER SYSTEM SEPARATION. In 2003 we saw major blackouts of power systems for US/Canada, Italy and London leading to billions of dollars of lost production and major impacts on many peoples lives. One aspect contributing to some of these is the control of system dynamic response and the targeted use of emergency controls such as load and generator shedding. This project is contributing to the development of an integrated control response such that appropriate levels of emerg ....EMERGENCY CONTROL FOR POWER SYSTEM SEPARATION. In 2003 we saw major blackouts of power systems for US/Canada, Italy and London leading to billions of dollars of lost production and major impacts on many peoples lives. One aspect contributing to some of these is the control of system dynamic response and the targeted use of emergency controls such as load and generator shedding. This project is contributing to the development of an integrated control response such that appropriate levels of emergency controls are determined and the probability of cascading blackouts reduced through automated systems. Read moreRead less
Advanced Planning Tools for the Prevention of System-wide Blackouts of Large Power Systems. In 2003 there had been major power blackouts in US/Canada, Italy and in Scandinavia leading to billions of dollars of lost production and had raised concern about national security. Prevention of blackout should be one of the highest priorities of the electricity industry. National security for any critical infrastructure of any country is more vulnerable for a prolonged blackout. This project will provid ....Advanced Planning Tools for the Prevention of System-wide Blackouts of Large Power Systems. In 2003 there had been major power blackouts in US/Canada, Italy and in Scandinavia leading to billions of dollars of lost production and had raised concern about national security. Prevention of blackout should be one of the highest priorities of the electricity industry. National security for any critical infrastructure of any country is more vulnerable for a prolonged blackout. This project will provide comprehensive planning tools to prevent blackouts in the Australian National Electricity grid. Any benefit to electricity industry will finally result in further benefits to the national economy and security as a whole.
Read moreRead less