Tae-Uk Jung

Kyungnam University

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Jin-Hyung Yoo

Kyungnam University

Chang-Seok Park

Kyungnam University

Seon-Hwan Hwang

Kyungnam University

Gyeong-Chan Lee

Kyungnam University

Hyun-Rok Cha

Korea Institute of Industrial Technology

Cheol-Ho Yun

Melbourne Centre for Nanofabrication

Sung‐Jun Park

Chonnam National University

Jung-Pyo Hong

Changwon National University

Hoe-Cheon Kim

Korea University

Seung-Han Kam

Kyungnam University

Cooperative Institutions

Kyungnam University

Pusan National University

Seoul National University

Samsung (South Korea)

Changwon National University

Chungnam National University

Hanyang University

Korea Institute of Industrial Technology

Korea Advanced Institute of Science and Technology

Pohang University of Science and Technology

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Research Field

A Back-EMF Estimation Error Compensation Method for Accurate Rotor Position Estimation of Surface Mounted Permanent Magnet Synchronous Motors

Energies (2017)

Tae-Uk Jung Jung-Hoon Jang Chang-Seok Park

This paper proposes a back electromotive force estimation error compensation method for accurate rotor position estimation of surface mounted permanent magnet synchronous motors. When estimating the rotor position of surface mounted permanent magnet synchronous motor sensorless drives, a direct current offset error component occurs in the voltage sensor. As a result, the rotor position is distorted and the sensorless control in surface mounted permanent magnet synchronous motor is degraded. In addition, the dq-axis voltages in the synchronous reference frame have the direct current offset error component, ripples compared with the motor frequency under the distorted rotor position. In this paper, the effects of the direct current offset errors are analyzed based on the synchronous reference frame phase locked loop. To remove this direct current offset error component, a d-axis voltage is converted into a synchronous reference frame again to compensate. In other words, it is a dual synchronous coordinate conversion compensation method. The compensator utilizes a proportional-integral controller that compensates by estimating the direct current offset error component. The proposed method is useful for the improvement of surface mounted permanent magnet synchronous motor sensorless control and operating performance. The effectiveness of the proposed algorithm is verified through PSIM simulation and experimental results.

Synchronous motor

Counter-electromotive force

10.3390/en10081160

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Citations (16)

Design of low cost power Converter system for fuel cell

Tae-Uk Jung Ju-Yong Kim Cheol Ho Choi

This paper studies the design of DC-DC Converter to convert low-voltage energy sources generated from renewable power like battery power, photovoltaic power, or fuel cells into high-voltage ones. The circuit topology of H-bridge converter to convert input voltage, 24 V, into out voltage, 270 V, was realized through applying phase shift angle control so as to manage electric power and voltage in the output side. The advantages of the converter system suggested are the low cost as well as current stress reduction, high efficiency, reliability, and simplified maintenance. It is also found that the system is highly useful to produce household electric power.

Buck converter

10.1109/intlec.2009.5351930

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The Development of Hybrid Electric Compressor Motor Drive System for HEV

Tae-Uk Jung Sung-Ho Lee Sung‐Il Kim Sung‐Jun Park Jung-Pyo Hong

The HEV (Hybrid Electrical Vehicle) becomes commercialized recently because of high fuel efficiency and low air pollution. The highest output power system except the traction motor is an air conditioner compressor in HEV system. The full or hybrid electric compressor is applied for HEV. The general HEC (Hybrid Electric Compressor) requires the half power motor and drive system of the full electric compressor because the rated output power of motor drive system is designed to charge the minimum cooling capacity at the time of idle stop. Therefore, this hybrid electric is more economical and practical solution. In this paper, we studied about the motor drive system of hybrid electric compressor for HEV. The applied voltage specification is 42 V, an IPMSM (Interior Permanent Magnet Synchronous Motor) is designed and applied as the compressor drive motor.

Traction motor

Motor drive

Single-phase electric power

10.1109/vppc.2007.4544234

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Citations (4)

The Design of humanoid Robot Arm based on Morphological and Neurological Analysis of Human Arm

International Conference on Mechatronics and Automation (2007)

Yong-Seon Moon Kwang Seok Lee Cheol-Ho Yun Tae-Uk Jung Nak Yong Ko

In this paper, we analyzed and verified possibility and validity of overcoming present limitations of humanoid robot by using morphological and neurological analysis of human arm. Through design, implementation and performance evaluation of humanoid robot arm, we will be verifying applicability and effectiveness of humanoid robot arm system based on SERCOS network that fulfills the concept of opening, networking and modularizations that are progressive direction of future robot.

Arm solution

10.1109/icma.2007.4303714

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Citations (5)

Design of Pole-Change Single-Phase Induction Motor for Household Appliances

IEEE Transactions on Industry Applications (2004)

Hyoung-Chul Nam Seong-Young Jung Gi‐Hwan Kang Jung-Pyo Hong Tae-Uk Jung

This paper deals with the design of a pole-change single-phase induction motor to reduce the harmonic components of the magnetic flux density in the air gap. The harmonics in the magnetic flux density distribution can have a significant detrimental effect on the characteristics of the machine such as crawling. In this paper, the magnetic flux density distribution is analyzed by analytical method and finite-element method. Discrete Fourier transform is used to analyze the harmonics and the characteristics are calculated from the equivalent circuit considering the harmonic components. The winding arrangement for the harmonic reduction is designed from the optimization method and the harmonic reduction of the improved models is verified through the experimental results.

Harmonic

Harmonic Analysis

Magnetic circuit

10.1109/tia.2004.827442

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Citations (9)

Sensorless Control for Interior Permanent Magnet Synchronous Motor (IPMSM) using Disturbance Observer with Variable Cut-off Frequency

Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (2011)

Junho Lee Hwa‐Choon Lee Sungho Lee Tae-Uk Jung Sung‐Jun Park

??Using sensors to detect current or voltage of motors is disadvantaged because motor is exposed to vibration, impacts, corrosion, high temperature and humidity in the machinery structure like HEV.br/ ??In the case of IPMSM, position information is included not only in the flux or EMF term but also in the rotator inductance because of its saliency. To solve this problem, a new mathematical model of IPMSMs on fixed frame is proposed and an extended EMF including rotating position information is defined to estimate extended EMF. A strong low-pass filter through the variable cut-off frequency using velocity function was proposed. This makes it is possible to estimate extended EMF by least order disturbance observer. The proposed method was proved through the experiment.

Observer (physics)

Harmonic

Position (finance)

10.5207/jieie.2011.25.1.078

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A Design Optimization of Asymmetric Air-gap Structure for Small 3-phase Permanent Magnet SPM BLDC Motor

Journal of Magnetics (2015)

Seung-Han Kam Tae-Uk Jung

As many researchers are relentlessly trying to improve the power generation schemes from the power grid, to meet the constantly increasing electricity demand.In this paper, the results of a finite element analysis are carried out to study on a design optimization of an asymmetric air-gap structure in 3-phase Permanent Magnet Brushless DC Motors.To achieve a high efficiency for a 3-phase PM BLDC motor, the asymmetric air-gap structure is proposed considering the rotation direction of a motor.Generally, a single-phase BLDC motor is applied asymmetric air-gap structure for starting.This is because the asymmetric air-gap structure causes reluctance variation so the motor can utilize reluctance torque toward a rotation direction.In this paper, the asymmetric air-gap is applied to 3-phase BLDC SPM motor so it utilizes reluctance torque with alignment torque.A proposed model is designed by 2-D FE analysis and the results are verified by experimental test.

Air gap (plumbing)

10.4283/jmag.2015.20.1.091

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Citations (6)

A New Controllable Active Clamp Algorithm for Switching Loss Reduction in a Module Integrated Converter System

Journal of international Conference on Electrical Machines and Systems (2014)

Chang-Seok Park Tae-Uk Jung

This paper proposes a new switching algorithm for an active clamp snubber to improve the efficiency of a module integrated converter system. This system uses an active clamp method for the snubber circuit for the efficiency and reliability of the system. However, the active clamp snubber circuit has the disadvantage that system efficiency is decreased by switch operating time because of heat loss in resonance between the snubber capacitor and leakage inductance. To address this, this paper proposes a new switching algorithm. The proposed algorithm is a technique to reduce power consumption by reducing the resonance of the snubber switch operation time. Also, the snubber switch is operated at zero voltage switching by turning on the snubber switch before main switch turn-off. Simulation and experimental results are presented to show the validity of the proposed new active clamp control algorithm.

Snubber

Clamp

Clamper

Voltage spike

10.11142/jicems.2014.3.4.465

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Citations (0)

Design to improve starting performance of line-start synchronous reluctance motor for household appliances

Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting. (2004)

Hyoung-Chul Nam S.B. Park Gyu-Hong Kang Jung-Pyo Hong Jae-Boo Eom

A single-phase line-start synchronous reluctance motor (LSynRM) has merits of low cost, high efficiency, and reliability. The LSynRM has the unbalanced magnetic circuit caused by flux barriers and various shapes of conductor bars. Thus, the motor can cause the unbalanced starting torque with the initial starting position of the rotor This paper presents the design to improve starting performance of the LSynRM for household appliances. Design variables are the number and the shape of the conductor bars. The motor is analyzed by finite element (FE) analysis. A SPIM (single-phase induction motor) for mass production, a prototype, and a designed model of LSynRM are manufactured and tested.

Magnetic reluctance

Reluctance motor

Line (geometry)

Synchronous motor

Position (finance)

10.1109/ias.2004.1348391

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Citations (18)

A study on improvement of output characteristics of HESS half-bridge converter for load variations

Han-guk marin enjinieoring hakoeji (2019)

Y.H. Ha Tae-Uk Jung Seon-Hwan Hwang Jin‐Soo Kim Jong‐Won Park

Half bridge

Bridge (graph theory)

10.5916/jkosme.2019.43.9.755

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Citations (0)