• 제목/요약/키워드: Motor power

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TBM용 대용량 전동기의 기동 특성 및 개선 관한 연구 (A Study on Starting Characteristic and Improvement for High Power Motor with Tunnel Boring Machine)

  • 김태규;안준영
    • 전기학회논문지
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    • 제68권1호
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    • pp.44-51
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    • 2019
  • Tunnel Boring Machine's Technology has depends mostly on imports, currently domestic technology development was proceeding. There are many technologies in this field, above all, the large-capacity motor drive technology required for excavation is one of the core technologies. In particular, when several large motors are simultaneously starting, there are many problems due to a large starting current at that time, and it is difficult to design and operate a power receiving facility. In this paper, A method of reducing the starting current by using the regenerative power generated by the deceleration of the motor has been studied. To verify this proposal, we designed the induction motor controller using CAE based power simulation tool and verified the results of the proposed method by applying the reduced model. As a result, it is possible to reduce the maximum starting current and shorten the start-up time. Moreover, even if several motors are connected to one bank, it is proved that the method can be efficiently operated by using the sequential braking / starting sequence. In the case of a power system in which a large capacity electric motor such as a tunnel excavation system is driven, the results of this study are expected to be a stable and effective method for solving the start-up current problem and designing the power receiving facility.

Fly-wheel을 갖는 권선형 유도전동기에 의한 전력보상 (The Power Compensation by Wound-Rotor Induction Motor with a Fly-wheel)

  • 이동우
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2000년도 전력전자학술대회 논문집
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    • pp.34-37
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    • 2000
  • This paper presents the power compensation by wound-rotor induction motor with a Fly-wheel. In the wound-rotor induction motor the primary power is controlled by AC excitation which used the secondary power conversion. Based on theory this paper describes the dynamic response analysis of the would-rotor induction motor with Fly-wheel. Simulation and experimental results are performed to verify the proposed control method

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부하변동에 따른 유도전동기 전류와 전력 특성 (Characteristics for Current and Power of Induction Motor by Load Variation)

  • 김종겸
    • 조명전기설비학회논문지
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    • 제25권8호
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    • pp.82-87
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    • 2011
  • Induction motor is most widely used as the driving power in the industrial site. Induction motor current is composed of two parts, magnetizing current and load current. Load current uses energy what is doing the work. Load current varies with load variance but magnetizing current is constant, regardless of load variation. Magnetizing current needs for establishing the rotating magnetic field of induction motor and lags behind the voltage. Generally capacitor is used for power-factor compensation of inductive load. Self-excitation occurs when the capacitive reactive current from the capacitor is greater than the magnetizing current of the induction motor. When this occurs, excessive voltages can result on the terminals of the motor. This excessive voltage can cause insulation degradation and ultimately result in motor insulation failure. In this paper, we analyzed that how the magnetizing current and condenser current is operating at the allowable limit by the load variation. Condenser current is below allowable limit of magnetizing current but magnetizing current is above allowable limit at the lower load operation condition.

4-WD 동력전환장치의 변속 모터 구동부 최적화에 관한 연구 (A Study on the Shift Motor Driving System Optimization of 4-WD Power Transformation Device)

  • 염광욱;함성훈;오세훈
    • 한국정밀공학회지
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    • 제30권11호
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    • pp.1187-1192
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    • 2013
  • In the case of 4 wheel drive (4-WD) type car, power switching occurs to 4-WD by operating lever or switch that operates power switching device attached in transfer case which can operate motor by electric signal. So if the RPM of motor is high, power switching will not exactly occur and can cause damage to gear in transfer case according to circumstances. So in this study, we applied 2 level of planet gear type motor spindle of motor drive part of a power train. And conducted decelerating to increase torque to switch power safe and accurately. Also, we researched efficiency of gear by designing reduction gear ratio and gear type and by calculating contact stress and bending strength. Based on researched content, we made drive head of power switching device and a reduction module which uses type that uses motor spindle as sun gear and ring gear as cover.

Improved Power Quality IHQRR-BIFRED Converter Fed BLDC Motor Drive

  • Singh, Bhim;Bist, Vashist
    • Journal of Power Electronics
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    • 제13권2호
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    • pp.256-263
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    • 2013
  • This paper presents an IHQRR (Integrated High Quality Rectifier Regulator) BIFRED (Boost Integrated Flyback Rectifier Energy Storage DC-DC) converter fed BLDC (Brushless DC) motor drive. A reduced sensor topology is derived by utilizing a BIFRED converter to operate in a dual DCM (Discontinuous Conduction Mode) thus utilizing a voltage follower approach for the PFC (Power Factor Correction) and voltage control. A new approach for speed control is proposed using a single voltage sensor. The speed of the BLDC motor drive is controlled by varying the DC link voltage of the front end converter. Moreover, fundamental frequency switching of the VSI's (Voltage Source Inverter) switches is used for the electronic commutation of the BLDC motor which reduces the switching losses in the VSI. The proposed drive is designed for a wide range of speed control with an improved power quality at the AC mains which falls within the recommended limits imposed by international power quality standards such as IEC 61000-3-2.

IPM모터의 턴쇼트 고장 대응운전 알고리즘 : 전력 손실 한계 내에서 최대토크 제어 (Interturn Fault Tolerant Driving Algorithm of IPMSMs : Maximum Torque Control within Power Loss Limit)

  • 임성환;구본관
    • 전기학회논문지
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    • 제67권1호
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    • pp.52-60
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    • 2018
  • The winding of the motor stator coil is broken due to external stress and various factors. If the proper current is not injected when interturn fault(ITF) occurs, the fault can easily be expanded and the motor can be finally destroyed, resulting in many problems with time costs and safety. In this paper, the power loss limit concept, which is the inherent durability of each motor, is applied to secure safety by controlling the total power loss of the motor within the limits. So, we propose an algorithm that can control maximum torque per minimum power loss based on constant torque curve and power loss limit. To verify the proposed method, the simulation and experimental results with an Interior permanent magnet synchronous motor(IPMSM) having an ITF are shown.

부하제어 기능을 갖는 디지털형 전동기제어반의 설계 및 구현 (Design and Implementation of Digital Motor Control Center Including Load Control Function)

  • 우천희;강신준;이덕규;구영모;김학배;이성환
    • 제어로봇시스템학회논문지
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    • 제5권7호
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    • pp.868-875
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    • 1999
  • In this paper, digital motor control center using protection relay is developed in order to protect power systems by means of timely fault detection and diagnosis during operation for induction motor which have various load environments and capacities in power systems. Digital motor control center is employed by power supervisory control systems without separate remote terminal unit and transducers adding communicational ability. Also we develope a maximum demand controller to control the load effectively at peak status and a power factor controller to minimize real power losses and improve the power factor. Therefore, when using the developed controller, real time computation is possible by loading DSP in hardware and applying real-time kernel which can convert each algorithm to task module.

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플럭스 스위칭 전동기의 고효율 드라이브에 대한 연구 (A Study on High Efficiency Flux Switching Motor drive)

  • 민병재;김동희;구본삼;최경호;김남훈
    • 조명전기설비학회논문지
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    • 제24권2호
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    • pp.92-100
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    • 2010
  • 최근에는 파워툴(Power tools)과 가전 제품에 있어서 전자적인 전류(commutation)를 사용하는 새로운 형태의 브러시리스 전동기인 플럭스 스위칭 전동기(Hux switching motor)에 대한 관심이 점차적으로 증가되고 있으며, 특히 팬과 펌프 시장에 있어서는 그린 정책으로 인하여 플럭스 스위칭 전동기에 대한 관심이 급격히 증가되고 있다. 플럭스 스위칭 전동기는 유도전동기에 비해서는 높은 전력 밀도(power density)와 상대적으로 높은 효율,그리고 브러시리스 DC 전동기에 비해서는 간단한 전동기 구조와 가격 경쟁력이라는 장점을 가지고 있다. 따라서 본 논문에 서는 팬 용도로 제작된 12/6 폴을 가지는 플럭스 스위칭 전동기의 동작원리와 고효율 드라이브의 타당성을 검증하기 위해서 TMS320F2812 DSP를 이용한 실험 결과를 제시한다.

차량용 윈도우 모터를 적용한 감속기 일체형 구동부 개발 (Development of Speed Reducer Integrated Driving system Apply to Vehicle Window Motor)

  • 염광욱;함성훈
    • 동력기계공학회지
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    • 제20권1호
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    • pp.57-62
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    • 2016
  • In this study, design the core part of the driving of the robot. The power of the driving is window motor for automobiles obtained by using a method of directly to the motor shaft of the worm gear type. The decelerator consists of a worm gear to receive power from the motor shaft, Helical gear contact to worm gear, a pinion gear to be connected in line with the helical gear, and an output shaft to be engaged to the pinion gear. Drive system by using the power from the motor shaft based on the deceleration gear designed by the gear ratio set by the gear teeth increases the torque.

전동식 파워스티어링 모터소음 저감을 위한 실험적 연구 (An Experimental Study on Motor Noise Reduction of Electric Power Steering)

  • 유충준
    • 동력기계공학회지
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    • 제12권6호
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    • pp.83-87
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    • 2008
  • EPS(Electric Power Steering) system, which has replaced the hydraulic steering system(HPS or HPAS) in many passenger cars recently, have many merits such as low energy consumption, easy mounting, light weight and improvement of environmental pollution. However, EPS system has the problem of motor noise when motor is rotated, which can make a driver feel uncomfortable. There are many techniques to solve those problems, but they are not clear. It is necessary to evaluate the mechanical noise in steering systems, because an EPS has vibration sources such as at the motor gear reducer, manual gears and intermediate joints. In this paper, reduction technique of EPS motor noise is introduced.

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