• 제어로봇시스템학회논문지
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• 제10권3호
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• pp.286-293
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• 2004

This paper presents the result of a study on the starter control for a turbo generator. Because a starter in gear box type turbo-generator system is composed of gearbox and brush DC motor, it should be replaced with High Speed Generator(HSG)) in HSG type Turbo-generator. There-ore, it is necessary to design a new starting algorithm and starter. In gearbox type system, brush DC motor is rotated to the designed speed using low voltage-high current battery power. After brush DC motor speed is increased to several times by gearbox, gas turbine engine can be rotated to designed starting speed. If we implement a starter with High Speed Generator(HSG), it is necessary to drive high-speed generator to high-speed motor. High-speed generator with permanent magnet on rotor has a low leakage inductance fur driving high-speed rotation, and it is necessary high DC link voltage for inverter when High-speed generator is driven to high speed. This paper presents result of development of the boost converter for converting high voltage DC from low battery voltage and design of the inverter for controlling a high frequency current to be injected to motor winding. Also, we show performance of the designed starter by driving the turbo generator.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2003년도 제21회 추계학술대회 논문집
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• pp.219-222
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• 2003

Turbo generator system need starter for gas turbine engine. Turbo generator has high rate gearbox for reduce rotating speed. Because a conventional generator could not operate same speed of gas turbine engine. But Recently turbo generator system is directly connected a gas turbine engine with a super high-speed generator. In this paper, starter driver are implemented direct coupled turbo generator system, Which is directly connected 100kW, 60,000rpm gas turbine engine and 25kW 60,000rpm super high speed generator.

• Journal of Mechanical Science and Technology
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• 제16권7호
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• pp.942-949
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• 2002

The use of a combined starter/generator integrated into the drive train of an automobile offers several possibilities for improvement of fuel economy The use of such a starter/generator system is made feasible by a switch from a 14 volts electrical system to a 42 volts system, however, the sizing of the components is not a trivial problem. This study combines a dynamic electromechanical model of the starter, battery and power electronics with the nonlinear mechanics of the piston/crankshaft system and a thermofluid model of the compression and expansion processes to investigate the cold start problem. The example involves the start of an eight cylinder engine at -25 degrees Celsius. This paper shows how the mechatronic V8 engine of an automotive starter/generator system for the startability works well.

• 한국자동차공학회논문집
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• 제14권1호
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• pp.123-128
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• 2006

The proposed mathematical model of the starter-generator system incorporates the motor speed, battery voltage and the desired current to estimate the moment generation capabilities of the starter-generator and the actual current of the battery system. The fundamentals for this mathematical modeling are the simulated results of the experimental data. These pertinent data are used in establishing the governing equations for the determination of motor moments, actual battery currents and efficiencies of the system's operation at different loading characteristics and speed regions. The derived equations will be used into simulation programs to predict the fuel efficiency, vehicle characteristics of a hybrid electric vehicle equipped with a transmission starter-generator which will be developed.

• 한국군사과학기술학회지
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• 제25권5호
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• pp.539-544
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• 2022

This research shows the test performance of a 6 kW-scale hybrid electric power system for the high endurance drone. The power system is composed of a two-stroke reciprocal engine, starter-generator and battery, and they are integrated as one power unit. The engine is designed to provide the house for holding the starter-generator at the end of a crankshaft in turn the engine and starter-generator can maintain the same speed during the operational period. In this way, the generated power is readily controlled by just manipulating an engine throttle movement. Moreover, the starter-generator can initiate an engine operation with an aid of battery power until the combustion process becomes stabilized. In consequence, integration mechanism between an engine and generator is simplified, which results in weight reduction achieved. The duty of back-up battery is to provide a starting power to generator via a system controller in addition to covering momentarily power shortage. Therefore, the electric power system is vindicated to provide 6 kW power through a ground test.

• Journal of Power Electronics
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• 제11권4호
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• pp.527-532
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• 2011

Due to the need for improved fuel consumption and the trend towards increasing the electrical content in automobiles, integrated starter generator (ISG) systems are being considered by the automotive industry. In this paper, in order to change the conventional generator of a vehicle, a belt driven integrated starter generator is considered. The overall ISG system, the design considerations for the claw pole type AC electric machine and a low voltage very high current power stage implementation are discussed. Test data on the low voltage claw pole type machine is presented, and a large current voltage source DC/AC inverter suitable for low voltage integrated starter generator operation is also presented. A metal based PCB (Printed Circuit Board) power unit to attach the 4-parallel MOS-FETs is used to achieve extremely high current capability. Furthermore, issues related to the torque assistance during vehicle acceleration and the generation/regeneration characteristics are discussed. A prototype with the capability of up to 1000 A and 27 V is designed and built to validate the kilo-amp inverter.

• 전력전자학회논문지
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• 제9권1호
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• pp.17-24
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• 2004

터보 제너레이터의 시동기는 터보 샤프트 발전 시스템 시동기의 구성인 기어박스, DC 전동기, 저 전압 축전지를 대신하여 고속 발전기, 인버터 그리고 승압기로 구성된다. 터보 제너레이터는 시동 시 고속 회전이 요구되어 고속발전기는 수십 $\mu$Η의 낮은 누설 인덕턴스를 가지며, 인버터는 높은 전압의 DC link 전압이 필요하다. 본 연구에서는 시동기 구현을 위해 축전지 전압을 높은 전압으로 승압하는 대 용량 승압기를 개발하였다. 그리고 낮은 누설 인덕턴스를 갖는 전동기 권선에 높은 주파수의 전류 제어를 위해 정밀 고속 연산을 수행하는 인버터 드라이버의 설계와 안정된 점화를 위한 터보 제너레이터의 시동 알고리즘을 제안하였다. 또한 개발한 시동기로 터보 제너레이터의 시동을 수행하여 성능을 확인하였다.

• 전력전자학회논문지
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• 제10권4호
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• pp.397-402
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• 2005

유도기의 고정자를 직접 전력 계통에 연결하는 유도형 풍력발전기의 계통 연계시 과도 상태 돌입 전류의 크기를 줄이기 위한 새로운 소프트 스타터(Soft Starter) 제어 알고리즘을 제안하였다. 현재 국내에 가장 많이 설치되어 있는 정속 운전형 풍력발전시스템의 기본 구성을 살펴보고 특히 소프트 스타터의 계통 연계 알고리즘에 따라 발전 개시 순간 과도 상태 전류의 크기가 크게 달라짐을 확인하였다. 이를 위해 600kw급 유도 발전기를 포함한 정속형 풍력발전 시스템의 시뮬레이션 모델을 개발하였고 실험실 환경에서 제안된 알고리즘을 시험하기 위한 3.7kW급 모의실험장치를 제작하였으며, 소프트 스타터의 제어 알고리즘 개선에 의해 돌입전류의 크기가 약 20$\%$ 감소됨을 확인하였다.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2006년도 제26회 춘계학술대회논문집
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• pp.167-170
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• 2006

파이로시동기는 단시간동안 1회 작동하여 터보펌프의 로터를 적절한 회전수로 돌려주어야만 한다. 이때 펌프의 가압된 추진제 성분이 가스발생기로 공급되어 연소되며 이로써 터빈의 지속적인 회전을 보장하게 된다. 본 연구에서는 가스발생기의 동작 이전의 엔진시동초기 작동시퀀스에서 터보펌프의 요구성능에 합당한 파이로 시동기의 규격을 선정하였다.

• 한국자동차공학회논문집
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• 제21권4호
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• pp.120-127
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• 2013

Hybrid electric vehicles have applied electric parts for saving fuel consumption and reducing levels of environmental pollution. Electrification of automobiles is indispensable for entering into global market because of enhanced environment restriction. ISG (Integrated Starter & Generator) system is one of main electric parts and can improve fuel efficiency more than other components by using Idle Stop & Go function and regenerative braking system. However, if ISG motor and inverter work under the continuously high load condition, it will make them the decrease of performance and durability. So the ISG motor and inverter need to properly design the cooling system of them. In this study, we suggested the enhancement points by modifying the thermal design of ISG motor and then confirmed the improvement of the cooling performance.