Search results for: Dae-Hyun Koo

Items from 1 to 20 out of 56 results

chapter

Weight Reduction of Electromagnet in Magnetic Levitation System for Contactless Delivery Application

Do-Kwan Honga, Byung-Chul Woo, Dae-Hyun Koo, Ki-Chang Lee

Studies in Computational Intelligence > Computational Methods for the Innovative Design of Electrical Devices > 219-227

This paper presents lightweight optimum design of electromagnet in magnetic levitation system. This paper deals with the possibility of using the response surface methodology (RSM) for optimization of an electromagnet with a higher number of the design variables. 2D and 3D magnetostatic analysis of electromagnet is performed by using ANSYS. The most effective design variables were extracted by pareto...

article

Development of thrust force 6 kN class transverse flux linear motor with synchronous control for direct drive applications

Do-Kwan Hong, Daesuk Joo, Ji-Won Kim, Byung-Chul Woo, more

International Journal of Precision Engineering and Manufacturing > 2015 > 16 > 1 > 191-196

This study investigates the experimental validation of transverse flux linear motors (TFLMs) with permanent magnet excitation and the dynamic simulation of the developed TFLM created using the optimal design. Our research challenge is to use the developed direct drive TFLM to substitute the rack and pinion in a rotary motor because the rack and pinion lacks speed and thrust. The electromagnetic field...

chapter

Bearingless transverse flux permanent magnet machine for large direct-drive

Deok-je Bang, Seon-Hwan Hwang, Ji-Won Kim, Wook Hwang, more

2014 IEEE Energy Conversion Congress and Exposition (ECCE) > 4874 - 4880

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

The aim of this paper is to develop and verify a new concept of bearingless machine for large direct-drive wind turbines. The new bearingless machine is constructed with double-sided air-gaps and flux concentrating transverse flux permanent magnet (TFPM) linear machine configuration. Unlike the windings of conventional bearingless machines, the main windings of the new bearingless machine are used...

chapter

Control of independent multi-phase transverse flux linear synchronous motor based on magnetic levitation

Seon-Hwan Hwang, Jang-Mok Kim, Deok-Je Bang, Ji-Won Kim, more

2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014 > 2488 - 2491

2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014

This paper proposes the control system for the independent multi-phase transverse flux linear synchronous motor (IM-TFLSM) based on magnetic levitation. Especially, the stator structures of the IM-TFLSM are composed of the two set which has the independent three-phase windings unlike the conventional Y-connected three-phase linear motors. Therefore, the control algorithms for the magnetic levitation...

chapter

New approach to EKF-based sensorless control using parallel structure for non-salient pole permanent magnet synchronous motors

Byoung-Gun Park, Jong-Mu Kim, Ji-Won Kim, Ki-Chang Lee, more

2013 International Conference on Electrical Machines and Systems (ICEMS) > 1099 - 1104

2013 International Conference on Electrical Machines and Systems (ICEMS)

This paper proposes a new sensorless control scheme of non-salient pole permanent magnet synchronous motors (PMSMs). To solve the drawback of Extend Kalman Filter (EKF) needing long computation time, a new sensorless scheme is achieved by using a parallel structure of EKF model, which alternatively operates at the sampling period. The proposed scheme can greatly save computation time with a similar...

article

Design and experimental validation of doubly salient permanent magnet linear synchronous motor for precision position control

Shi-Uk Chung, Ji-Won Kim, Byung-Chul Woo, Do-Kwan Hong, more

Mechatronics > 2013 > 23 > 2 > 172-181

A typical iron-core permanent magnet linear synchronous motor (PMSLM) suffers force ripple originated from detent force. Rare earth permanent magnets (PMs) in stationary part cause cost issue. This paper introduces a doubly salient PMLSM (DSPMLSM) which reduces force ripple and number of PMs in stationary part. A prototype DSPMLSM is made based on geometry optimization by response surface methodology...

article

Torque Density Elevation in Concentrated Winding Interior PM Synchronous Motor With Minimized Magnet Volume

Mi-Jung Kim, Su-Yeon Cho, Ki-Doek Lee, Jae-Jun Lee, more

IEEE Transactions on Magnetics > 2013 > 49 > 7 > 3334 - 3337

Permanent magnet (PM) synchronous motors (PMSMs) have been used to drive a number of vehicles. They have high torque density, high efficiency, and a wide speed range. However, the high cost of PMs is disadvantageous. This paper presents a technique for increasing the torque density by modifying the shape of the PMs and minimizing the magnet volume. The PM characteristics such as flux density, demagnetizing...

article

An Analytical Approach for a High Speed and High Efficiency Induction Motor Considering Magnetic and Mechanical Problems

Dong-Jun Kim, Do-Kwan Hong, Jae-Hak Choi, Yon-Do Chun, more

IEEE Transactions on Magnetics > 2013 > 49 > 5 > 2319 - 2322

This paper deals with the analysis techniques of a high speed and high efficiency 10 kW, 30,000 rpm rated induction motor. The induction motor has been analyzed by time-varying magnetic finite element method and the test results show that there is a possibility that the motor could be used in a high speed spindle system application. All analysis techniques are introduced to develop a high speed and...

article

Development of a High Speed Induction Motor for Spindle Systems

Do-Kwan Hong, Jae-Hak Choi, Dong-Jun Kim, Yon-Do Chun, more

IEEE Transactions on Magnetics > 2013 > 49 > 7 > 4088 - 4091

This paper deals with the analysis techniques of a high speed and high efficiency 10 kW, 30 000 rpm rated induction motor. The induction motor has been analyzed by the time-varying magnetic finite element method and the test results show that there is a possibility that the motor could be used in a high speed spindle system application. All performances of the prototype are successfully verified....

article

Investigations on a Super High Speed Motor-Generator for Microturbine Applications Using Amorphous Core

Do-Kwan Hong, Daesuk Joo, Byung-Chul Woo, Yeon-Ho Jeong, more

IEEE Transactions on Magnetics > 2013 > 49 > 7 > 4072 - 4075

The research institute is developing a motor-generator that fits into a microturbine generator (MTG) system with a power density of 500 W. This paper introduces the design, analysis, production and assessment of the heart of an MTG system, the motor-generator, whereby an amorphous core is applied creatively to a stator core. The motor-generator is designed and analyzed with consideration to losses...

article

Performance verification of a high speed motor-generator for a microturbine generator

Do-Kwan Hong, Daesuk Joo, Byung-Chul Woo, Yeon-Ho Jeong, more

International Journal of Precision Engineering and Manufacturing > 2013 > 14 > 7 > 1237-1244

The Research Institute is developing a motor-generator that fits into a microturbine generator (MTG) system with a power density of 500W. This paper introduces the design, analysis, production and assessment of the heart of an MTG system, the motor-generator, whereby an amorphous core is applied creatively to a stator core. The motor-generator is designed and analyzed with consideration to losses...

article

Development of an ultra high speed permanent magnet synchronous motor

Do-Kwan Hong, Byung-Chul Woo, Yeon-Ho Jeong, Dae-Hyun Koo, more

International Journal of Precision Engineering and Manufacturing > 2013 > 14 > 3 > 493-499

To accomplish the research of a PM synchronous motor driven by 15 kW at a rated speed of 120 krpm. This paper represents an approach to minimize the eddy current losses that occur frequently at high speeds. Various simulation and testing techniques are applied to grasp the physical phenomena. Here, sleeve thickness is proposed parameter for analysis. Finally, this paper studies the developed model...

article

Rotordynamic analysis and experimental validation of a high speed induction motor made by copper die casting process

Do-Kwan Hong, Jae-Hak Choi, Byung-Chul Woo, Dae-Hyun Koo, more

Journal of Mechanical Science and Technology > 2013 > 27 > 10 > 3035-3041

A copper die casting induction motor can obtain an energy saving effect of about 2–3% compared to previous aluminum die casing induction motors. In addition, copper die casting motors can reduce the size of motors and reduce material costs. The critical speed and unbalance response of high speed machines need to be verified by rotordynamic analysis for dynamic stability of the rotors. The critical...

chapter

Unbalance Analysis of 15KW, 120krpm, Ultra High Speed Permanent Magnet Synchronous Motor

Do-Kwan Hong, Byung-Chul Woo, Chan-Woo Ahn, Dae-Hyun Koo

2012 Sixth International Conference on Electromagnetic Field Problems and Applications > 1 - 4

2012 Sixth International Conference on Electromagnetic Field Problems and Applications (ICEF)

To accomplish the research of a PM synchronous motor driven by 15kW at a rated speed of 120krpm, this paper represents an approach to minimize the eddy current losses that occur frequently at high speeds. Various simulation and testing techniques are therefore applied to grasp the physical phenomena. Here, the proposed parameter for analysis is sleeve thickness. Finally, this paper studies the developed...

chapter

Iron Loss of 50 W, 100000 rpm Permanent-Magnet Machine in Micro Gas Turbine

Daesuk Joo, Do-Kwan Hong, Byung-Chul Woo, Yeon-Ho Jeong, more

2012 Sixth International Conference on Electromagnetic Field Problems and Applications > 1 - 4

2012 Sixth International Conference on Electromagnetic Field Problems and Applications (ICEF)

The high speed permanent-magnet synchronous generator is an important component of micro gas turbine. One of the major problems in micro turbine generator is an increase in iron loss with increasing rotational speed. In order to minimize the iron loss, PNF-Core (20PNF1500, posco electrical steel) is used for stator core. The core has good magnetic properties in high frequency where eddy current loss...

chapter

Closed-loop regenerative efficiency testing with electric vehicle bidirectional DC-DC converter

Seung-Ryul Moon, Ki-Chang Lee, Jong-Moo Kim, Dae-Hyun Koo

2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC) > 2461 - 2466

2012 IEEE Applied Power Electronics Conference and Exposition - APEC 2012

Bidirectional dc-dc converters have been widely used in hybrid electric vehicles (HEV), fuel cell vehicles (FCV), and electric vehicles (EV). In this paper, a 60 kW, three-phase, bidirectional dc-dc converter prototype for electric vehicle is presented along with experimental results. One important evaluation criterion for any converter is efficiency. Due to the high-power level and the bidirectional...

article

Fractional Slot Concentrated Winding Permanent Magnet Synchronous Machine With Consequent Pole Rotor for Low Speed Direct Drive

Shi-Uk Chung, Jong-Moo Kim, Dae-Hyun Koo, Byung-Chul Woo, more

IEEE Transactions on Magnetics > 2012 > 48 > 11 > 2965 - 2968

Fractional slot concentrated winding permanent magnet synchronous machines (FSCW PMSMs) are suited for low speed direct drive since they offer comparatively large number of poles, high torque density, and low torque ripple. This paper introduces feasibility study on FSCW PMSMs with consequent pole (CP) rotor for low speed direct drive. A 40 pole-48 slot FSCW PMSM with CP rotor is analyzed and characterized...

article

Design of an Axial Flux Permanent Magnet Generator for a Portable Hand Crank Generating System

Ji-Young Lee, Dae-Hyun Koo, Seung-Ryul Moon, Choong-Kyu Han

IEEE Transactions on Magnetics > 2012 > 48 > 11 > 2977 - 2980

This paper deals with a design of an axial flux permanent magnet (AFPM) generator which is a key element of a compact size portable and manual generator system composed of a gear system, a generator, a rectifier, and a battery charger. The design objects of the AFPM generator are its compact size, light weight, and high efficiency, and the three design objects are the main criteria to select the value...

article

Ultra High Speed Motor Supported by Air Foil Bearings for Air Blower Cooling Fuel Cells

Do-Kwan Hong, Byung-Chul Woo, Ji-Young Lee, Dae-Hyun Koo

IEEE Transactions on Magnetics > 2012 > 48 > 2 > 871 - 874

As accomplishing the research of the PM synchronous motor driven by 15 kW at the rated speed of 120,000 rpm, this paper represents an approach to minimize eddy current losses which occur prominently at high speed. Various simulation and testing techniques are therefore applied to determine the effect of design parameters. Here, the proposed parameters for analysis are winding types, slot opening width...

article

Dynamic simulation and experimental verification of flux reversal linear synchronous motor

Shi-Uk Chung, Ji-Won Kim, Byung-Chul Woo, Do-Kwan Hong, more

International Journal of Precision Engineering and Manufacturing > 2012 > 13 > 2 > 175-181

This paper presents a dynamic simulation model which fully describes transient and steady-state operation of flux reversal linear synchronous motor (FRLSM). Magnetic field computations by finite element analysis considering inter-phase coupling effect are performed to establish phase decoupled voltage equation for the dynamic simulation. Simulation parameters such as thrust, normal force, flux linkage,...

Publication date

Set your own date range

Content availability

Available (55)
None (1)

Publication type

article (34)
book (22)

Keywords

ROTORS (18)
PERMANENT MAGNET MOTORS (16)
FINITE ELEMENT ANALYSIS (15)
TORQUE (13)
INDUCTION MOTORS (10)
STATORS (9)
SYNCHRONOUS MOTORS (9)
STATOR WINDINGS (8)
MAGNETIC FLUX (7)
COPPER (6)
MAGNETIC ANALYSIS (6)
AIR GAPS (5)
COGGING TORQUE (5)
CRITICAL SPEED ANALYSIS (5)
FEM (5)
FINITE ELEMENT METHODS (5)
FORCE (5)
MACHINE WINDINGS (5)
MAGNETIC LEVITATION (5)
UNBALANCE RESPONSE ANALYSIS (5)
CONSEQUENT POLE (4)
EQUIVALENT CIRCUITS (4)
FORGING (4)
RESPONSE SURFACE METHODOLOGY (4)
SHAPE (4)
BRUSHLESS DC MOTORS (3)
CRITICAL SPEED (3)
ELECTRIC POTENTIAL (3)
EQUIVALENT CIRCUIT (3)
FINITE ELEMENT METHOD (3)
GENERATORS (3)
HARMONIC ANALYSIS (3)
LINEAR SYNCHRONOUS MOTOR (3)
MAGNETIC CIRCUITS (3)
MATHEMATICAL MODEL (3)
OPTIMIZATION (3)
PERMANENT MAGNET (3)
PROTOTYPES (3)
RESPONSE SURFACE METHODOLOGY (RSM) (3)
STATOR (3)
STRUCTURAL ANALYSIS (3)
TRACTION MOTORS (3)
WINDINGS (3)
WIRES (ELECTRIC) (3)
ACTIVE MAGNETIC BEARING (2)
ALUMINUM (2)
AMORPHOUS CORE (2)
ATMOSPHERIC MODELING (2)
AXIAL FLUX PM MOTOR (2)
BRUSHLESS PERMANENT MAGNET DC MOTORS (2)
CAMPBELL DIAGRAM (2)
CLOSED SLOT OPENING (2)
COMPUTATIONAL FLUID DYNAMICS (2)
COMPUTATIONAL FLUID DYNAMICS (CFD) (2)
COMPUTATIONAL MODELING (2)
CONDUCTORS (2)
CURRENT COMPENSATION (2)
DETENT FORCE (2)
DOUBLY SALIENT (2)
DYNAMIC SIMULATION (2)
ELECTRIC MACHINES (2)
ELECTRIC MOTORS (2)
ELECTRIC VEHICLES (2)
ELECTROMAGNETIC ACTUATORS (2)
FINITE ELEMENT METHOD (FEM) (2)
FLUX REVERSAL (2)
FORCE RIPPLE (2)
FUEL CELLS (2)
GENETIC ALGORITHMS (2)
GOLF CART SYSTEM (2)
HYBRID ELECTRIC VEHICLES (2)
INPUT CURRENT DENSITY (2)
INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTOR (IPMSM) (2)
IPMSM (2)
LINEAR INDUCTION MOTORS (2)
MACHINE CONTROL (2)
MACHINE THEORY (2)
MAGNETIC BEARINGS (2)
MAGNETIC CORES (2)
MAGNETIC FIELD ANALYSIS (2)
PERMANENT MAGNETS (2)
POWER 15 KW (2)
RELUCTANCE MOTORS (2)
RESISTANCE (2)
SEGMENT MAGNET WIRE (2)
SEGMENT RECTANGULAR COPPER WIRE (2)
SHAFT (2)
SHAFTS (2)
SHRINK FIT (2)
SLOT OPENING (2)
SOFT MAGNETIC COMPOSITE (SMC) (2)
STATOR CORES (2)
STRESS (2)
STRUCTURAL STRENGTH ANALYSIS (2)
TAGUCHI METHOD (2)
TAGUCHI METHODS (2)
THREE DIMENSIONAL DISPLAYS (2)
THREE PHASE INDUCTION MOTOR (2)
THREE-TERM CONTROL (2)
TORQUE RIPPLE (2)
more

Data set

ieee (46)
Springer (8)
Elsevier (2)

INFONA - science communication portal

Search results for: Dae-Hyun Koo

Weight Reduction of Electromagnet in Magnetic Levitation System for Contactless Delivery Application

Development of thrust force 6 kN class transverse flux linear motor with synchronous control for direct drive applications

Bearingless transverse flux permanent magnet machine for large direct-drive

Control of independent multi-phase transverse flux linear synchronous motor based on magnetic levitation

New approach to EKF-based sensorless control using parallel structure for non-salient pole permanent magnet synchronous motors

Design and experimental validation of doubly salient permanent magnet linear synchronous motor for precision position control

Torque Density Elevation in Concentrated Winding Interior PM Synchronous Motor With Minimized Magnet Volume

An Analytical Approach for a High Speed and High Efficiency Induction Motor Considering Magnetic and Mechanical Problems

Development of a High Speed Induction Motor for Spindle Systems

Investigations on a Super High Speed Motor-Generator for Microturbine Applications Using Amorphous Core

Performance verification of a high speed motor-generator for a microturbine generator

Development of an ultra high speed permanent magnet synchronous motor

Rotordynamic analysis and experimental validation of a high speed induction motor made by copper die casting process

Unbalance Analysis of 15KW, 120krpm, Ultra High Speed Permanent Magnet Synchronous Motor

Iron Loss of 50 W, 100000 rpm Permanent-Magnet Machine in Micro Gas Turbine

Closed-loop regenerative efficiency testing with electric vehicle bidirectional DC-DC converter

Fractional Slot Concentrated Winding Permanent Magnet Synchronous Machine With Consequent Pole Rotor for Low Speed Direct Drive

Design of an Axial Flux Permanent Magnet Generator for a Portable Hand Crank Generating System

Ultra High Speed Motor Supported by Air Foil Bearings for Air Blower Cooling Fuel Cells

Dynamic simulation and experimental verification of flux reversal linear synchronous motor

Filter options

Publication date

Content availability

Publication type

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: Dae-Hyun Koo

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Publication type

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options