Browsing by Author "Hsieh Min-Fu"

Alternative Rotor Designs for High Performance Brushless Permanent Magnet Machines for Hybrid Electric Vehicles

Dorrell David; Hsieh Min-Fu; Knight A (IEEE, 2012)

This paper investigates different rotor topologies based on the spoke design as an alternative to the internal permanent magnet design currently used in the Toyota Prius 2004 design. Reference is made to the 2010 model ...

Analysis of axial voltages and inter-bar currents in cast copper cage rotors during DC current injection as an aid to identify casting faults

Dorrell David; Frosini Lucia; Bottani Marcello; Galbiati Giacomo; Hsieh Min-Fu (IEEE, 2009)

In this paper an investigation is carried out to see if it is possible to assess the condition of a rotor by clamping it in a DC-current-injection rig and measuring voltages in bars at regular intervals down the axial ...

Calculation of Radial Forces in Cage Induction Motors at Start - The Effect of Rotor Differential

Dorrell David; Hsieh Min-Fu (IEEE, 2010)

In this paper, the radial forces in an induction motor are calculated using finite element analysis. These radial forces (or unbalanced magnetic pull-UMP) are generated when the rotor is eccentric. The work illustrates the ...

Cogging Torque Reduction in Axial Flux Machines for Small Wind Turbines

Hsieh Min-Fu; Dorrell David; Yeh Y.; Ekram Samsul (IEEE, 2009)

This paper presents a technique for cogging torque reduction in an axial-flux permanent-magnet (PM) generator suitable for use in a small wind turbine. These machines can be compact and have high power density; they are ...

Cogging torque reduction in axial flux machines for small wind turbines

Hsieh Min-Fu; Ekram Samsul; Dorrell David (IEEE, 2009)

Axial-flux slotted permanent magnet machines possess high power density and are suitable for wind turbine applications, where two-sided axial-flux configuration is superior to one-sided configuration [1]. There have been ...

Damper windings in induction machines for reduction of unbalanced magnetic pull and bearing wear

Dorrell David; Shek Jonathan; Mueller Markus; Hsieh Min-Fu (IEEE, 2011)

In large induction machines (such as cage large induction motor pumps in the petro-chemical industry and cage or wound-rotor induction generators in wind turbines) reliability and longevity is advantageous. This is ...

Design of Large Power Surface-Mounted Permanent-Magnet Motors Using Post-Assembly Magnetization

Hsieh Min-Fu; Hsu You-Chuan; Dorrell David (The Institute of Electrical and Electronics Engineers, Inc., 2007)

This paper reports the design process for the manufacture of higher power rare-earth permanent-magnet motors using post-assembly magnetization. With these machines, difficulties can be encountered in production using normal ...

Design Of Large-Power Surface-Mounted Permanent-Magnet Motors Using Postassembly Magnetization

Hsieh Min-Fu; Hsu You-Chuan; Dorrell David (IEEE-Inst Electrical Electronics Engineers Inc, 2010)

This paper reports the design process for the manufacture of higher-power rare-earth permanent-magnet (PM) motors using postassembly magnetization. Difficulties can be encountered in production using normal manufacturing ...

Different Arrangements for Dual-Rotor Dual-Output Radial-Flux Motors

Yeh Y.; Hsieh Min-Fu; Dorrell David (IEEE, 2010)

This paper describes different arrangements for a dual-rotor, radial-flux, permanent-magnet brushless DC motor for application to variable-speed air conditioners. In conventional air conditioners, two motors of appropriate ...

Different Arrangements for Dual-Rotor Dual-Output Radial-Flux Motors

Yeh Y.; Hsieh Min-Fu; Dorrell David (IEEE, 2012)

This paper describes different arrangements for a dual-rotor, radial-flux, and permanent-magnet brushless dc motor for application to variable-speed air conditioners. In conventional air conditioners, two motors of appropriate ...

Investigation on End Winding Inductance in Motor Stator Windings

Hsieh Min-Fu; Hsu You-Chuan; Dorrell David; Hu Kai-Hsiang (IEEE, 2007)

This paper presents an analytical approach for the calculation of end winding inductance in motor windings. The method aims to provide a rapid and accurate solution for inclusion in motor and drive design, analysis and ...

Issues with Low Speed Direct-Drive Permanent-Magnet Generator Design - Comparison of Radial-Flux Slotted and Torus Machines

Dorrell David; Hsieh Min-Fu (IEEE, 2010)

This paper describes two alternative designs of a direct-drive permanent-magnet generator for use in a novel seawave electrical generator. The basic system is briefly described and the target specification is given from ...

Modeling and effects of in-situ magnetization of isotropic ferrite magnet motors

Hsieh Min-Fu; Lin Ching-Kuo; Dorrell David; Wung Peter (IEEE, 2011)

This paper outlines a method using finite element analysis to model the magnetization process of a small brushless surface-magnet 3-phase motor with isotropic ferrite magnets and concentrated windings. This is aimed at ...

A multi-chamber oscillating water column using cascaded Savonius turbines

Dorrell David; Hsieh Min-Fu; Lin Chi-Chien (IEEE, 2009)

This paper describes a small segmented oscillating water column with three sections and the modeling techniques that can be used to simulate its performance. The turbine uses cascaded Savonius rotors and the unit is developed ...

A Multichamber Oscillating Water Column Using Cascaded Savonius Turbines

Dorrell David; Hsieh Min-Fu; Lin Chi-Chin (IEEE, 2010)

This paper describes a project which addresses the use of a small segmented oscillating water column with three sections. The turbine utilizes cascaded Savonius rotors (one for each section), and this system is developed ...

Performance of Wells Turbines for use in Small-Scale Oscillating Water Columns

Dorrell David; Hsieh Min-Fu (The International Society of Offshore and Polar Engineers, 2008)

This paper will assess the viability of small Wells turbines for oscillating water columns. The paper reports on a complete assessment of the integration of the system. It begins with a study using computational fluid ...

Post-Assembly Magnetization of Rare-Earth Fractional-Slot Permanent-Magnet Machines using a Two-Shot Method

Hsieh Min-Fu; Lien Yao-Min; Dorrell David (IEEE, 2010)

This paper studies the post-assembly magnetization of a fractional-slot brushless rare-earth surface permanentmagnet machine with six rotor poles and nine stator slots. In the paper, the simulation method is discussed and ...

Post-Assembly Magnetization of Rare-Earth Fractional-Slot Permanent-Magnet Machines using a Two-Shot Method

Hsieh Min-Fu; Hsu You-Chuan; Dorrell David (IEEE, 2011)

This paper studies the post-assembly magnetization of a fractional-slot, concentrated winding brushless rare-earth surface permanent-magnet machine with six rotor poles and nine stator slots. In the paper, the simulation ...

Post Assembly Magnetization Patterns in Rare-Earth Permanent-Magnet Motors

Dorrell David; Hsieh Min-Fu; Hsu You-Chuan (IEEE, 2007)

This paper illustrates a method for verifying the full magnetization of a rare-earth permanent-magnet motor when it is magnetized using a post-assembly method. The usual method of manufacturing a rare-earth magnet machine ...

A Radial Flux Machine with Dual Rotors Dual Output Shafts for Variable Speed Air Conditioners

Hsieh Min-Fu; Yeh Y.; Dorrell David; Ekram Samsul (IEEE, 2009)

This digest presents the analysis of a radial flux, dual-rotor-outputs, permanent magnet brushless DC motor for variable-speed air conditioners (Fig. 1). Two motors of appropriate ratings are usually used to separately ...

Browsing by Author "Hsieh Min-Fu"

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Browsing by Author "Hsieh Min-Fu"