• The Transactions of the Korean Institute of Power Electronics
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• v.13 no.6
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• pp.420-429
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• 2008

This paper describes design procedure and control strategy of HDC(High side DC/DC Converter) and MCU(Motor Control Unit) for diesel hybrid electric vehicle. In designing HDC and MCU for HEV high power density and reliability is strongly needed to meet the demand of automotive industry. In order to achieve the high performance of a controller, MPC5554 based control board is developed. An optimized film capacitor and inductor are also developed for high efficiency driving. Skim 63 IGBT module of SEMIKRON for automotive is used for power switching device. The most efficient cooling model for optimal size and reliability were verified by simulation. These procedures are verified by bench or driving test and the results are present in this paper.

• Proceedings of the KIPE Conference
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• 2016.07a
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• pp.525-526
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• 2016

전기자동차 (EV)에서 구동용 모터의 토크 제어를 위한 인버터에는 제어 연산 및 고장 진단 기능을 수행하기 위한 MCU가 있으며, MCU는 상위 제어기 차량 제어 유닛 (VCU)에게 현재 모터 및 인버터의 상태를 주기적으로 전달하고, 현재 차량 주행에 적합한 토크 지령을 받아 토크 제어를 수행하게 된다. 이를 위해 MCU는 전류, 전압 및 위치 센서의 값을 읽어 제어를 수행하게 되며, 제어의 결과 값으로 pulse width modulation (PWM)을 생성하여 이를 통해 모터에 전압을 공급하게 된다. 즉 차량의 구동에 있어 PWM 신호는 가장 중요한 부분이다. 하지만 생산 불량 또는 진동에 의한 납땜 불량 또는 MCU 전원 고장 등으로 MCU에 고장이 발생하게 되면 이상 PWM을 생성하게 되고 정상적인 토크 제어가 불가능해진다. 이때 안전하게 EV를 정지 시키는 알고리즘이 필요하게 되며, 이를 수행 할 supervisor control unit (SCU)가 인버터 컨트롤 보드에 추가되어야 한다. 본 논문에서는 고속으로 주행하던 차량에서 메인 MCU가 고장 날 경우에 안전하게 EV를 정차시키는 방법에 대해 다루었다.

• Journal of the Korea Safety Management & Science
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• v.17 no.3
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• pp.363-370
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• 2015

In this paper, the control technique of the stepping motor using back electromotive force(B-EMF) without encoder is investigated. The stepping motor generally uses the rotary encoder to detect the rotor position. Since this method increases the cost and the motor configuration size, the new closed-loop control method applied for the B-EMF was implemented by using current detect circuit, AD-converter, and micro controller unit(MCU). The control loop of stepping motor became very simplified. The current change of stepping motor measured by the amplifier was measured and analyzed, when the missing step is occurred. Based on the data from current feedback, position errors were compensated and confirmed by using AD-converter.

• Proceedings of the KIPE Conference
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• 2011.11a
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• pp.16-17
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• 2011

본 논문에서는 120kW급 하이브리드 전기 차량용 IPMSM 제어기 개발 사례를 소개 한다. 높은 출력 밀도를 요구하는 하이브리드 전기차량의 특성을 고려하여 개발된 IPMSM(매입형 영구자석 동기전동기)를 대상으로 대전류, 고효율 시스템 구성을 위해 수냉식 MCU(Motor Control Unit)를 개발 하였다. 또한 효율적인 차량 전원 배선 및 냉각 유로 구성을 고려한 전원 분배 기능 및 방열판 설계기법이 적용 되었다. 개발된 MCU를 모의 해석 및 실험을 통해 검증 하였다.

• Journal of Electrical Engineering and Technology
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• v.7 no.3
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• pp.366-375
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• 2012

This paper describes a design and temporal analysis of a hardware-in-the-loop (HIL) simulation environment for testing a motor control unit (MCU). The design concepts and main characteristics including unavoidable time delays of each component module are described. From temporal analysis results according to the module integration method, an appropriate solution is proposed to fix and minimize time delays. In order to verify the effectiveness of the proposed solution, the HIL test results are compared with the results of experiments and an offline simulation.

• IEMEK Journal of Embedded Systems and Applications
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• v.4 no.3
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• pp.112-117
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• 2009

An animal assisted therapy (AAT) for handicapped child's psychotherapy has been reported by some researches. A robot can be substituted for the role of a real animal of the AAT. The robot for the AAT is called RAT (Robot Assisted Therapy). It consists of four parts: microprocessor-based MCU(Micro Control Unit), sensing part with various sensors, the movement part operated by some motors, and the exterior with soft feel. We will here introduce the RAT.

• Proceedings of the KIPE Conference
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• 2008.06a
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• pp.7-11
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• 2008

This paper describes design procedure and control strategy of HDC(High side DC/DC Converter) and MCU(Motor Control Unit) for diesel hybrid electric vehicle. In designing HDC and MCU for HEV high power density and reliability is strongly needed to meet the demand of automotive industry. In order to achieve the high performance of a controller, MPC5554 based control board is developed. An optimized film capacitor and inductor are also developed for high efficiency driving. Skim 63 IGBT module of SEMIKRON for automotive is used for power switching device. The most efficient cooling model for optimal size and reliability were verified by simulation. These procedures are verified by bench or driving test and the results are present in this paper.

• Journal of IKEEE
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• v.22 no.3
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• pp.630-637
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• 2018

To supply a high voltage to an inverter, a motor control unit (MCU) generally employs a front-end boost converter. Because it generates a high output voltage, the converter needs an output capacitor, which has a high working voltage resulted in cost increasing. To solve this problem, we present a bidirectional dc-to-dc converter, which can decrease a working voltage of the output capacitor. Basic characteristic of the proposed converter is similar to a conventional boost converter. A difference comes from the structure of the output terminal connecting an output capacitor and an input battery in series. Owing to this circuit configuration, the working voltage of the output capacitor becomes lower than that of a conventional boost converter. After theoretical analysis, we carry out simulations and experiments to verify the validity and performance comparing with a conventional boost converter.

• Proceedings of the KIPE Conference
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• 2011.11a
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• pp.239-240
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• 2011

본 논문에서는 도심형 근거리 전기자동차의 구동을 위한 통합형 전력변환장치 개발에 대해 소개한다. 차량 구동용 유도 전동기 제어와 주동력 배터리 충전 및 전장배터리 충전의 기능을 가지기 위하여 MCU(Motor Control Unit), OBC(On-Board Charger), LDC(Low Voltage DC-DC Converter)를 적용하였다. 각각의 전력변환장치들 사이에 불필요한 커넥터를 없애고 단일 방열판 위에 각 요소부품을 배치하여 하나의 통합된 기구 물 위에 모든 기능을 발휘하도록 통합형 전력변환장치를 개발하였다. 개별 기능을 가지는 MCU와 OBC, LDC의 단품 성능시험을 거친 후 실차에 장착하여 차량모터제어 및 배터리 충전을 실험을 통하여 확인하였다.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2006.06a
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• pp.167-168
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• 2006

This paper is concerned about the development system that the bead width's size can be controlled. In order to control the bead width, DC motor driving slide on auto carriage is used. The adjustment of bead width is carried by amplitude and weaving shape is controlled by MCU(Micro Controller Unit). We confirmed the result by tracking experiments.