• 제목/요약/키워드: Adjustable-speed drives

검색결과 42건 처리시간 0.041초

가변속 구동장치의 부하측에서 발생하는 고조파 해석 (Analysis of Harmonics generated at Load of Adjustable Speed Drives)

  • 김종겸;이은웅;이동주
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1997년도 추계학술대회 논문집 학회본부
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    • pp.46-48
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    • 1997
  • Induction motor control using for adjustable speed drives has caused secondary effect such as harmonics. Therefore it is considered a various countermeasures to minimize these effects. In this paper, we analyzed the influence of harmonics that is generated by the inverter device for adjustable speed drive of induction motor at the load side.

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가변속 직류구동시스템 관련 국제규격에 관한 연구 (A Study on International Standards Related to Adjustable Speed DC Drive Systems)

  • 홍순찬;김경원
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2002년도 추계학술대회 논문집
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    • pp.223-226
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    • 2002
  • This paper studies the scope and text summary of international standards related to adjustable speed d.c. drive systems, especially IEC 61800-1 and IEC 61136-1. IEC 61800-1 applies to general purpose adjustable speed d.c. drive systems which include the power conversion, control equipment, and also a motor or motors. This standard applies to power drive systems connected to line voltages up to 1kV a.c., 50Hz or 60Hz. IEC 61136-1 provides alternative methods for specifying ratings for semiconductor power convertors for adjustable speed electric drive systems, particularly for d.c. motor drives.

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가변속 드라이브의 사용에 따른 스위칭 서지전압 측정 (A Measurement of Switching Surge Voltage using Adjustable Speed Drives)

  • 김종겸;이은웅;김일중
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2002년도 하계학술대회 논문집 B
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    • pp.838-840
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    • 2002
  • Most adjustable-speed drives (ASDs) designed to operate 220[V] induction motors incorporate voltage-source inverters (VSIs), which create motor voltages at high switching frequencies. The motor leads used to connect an ASD to a motor can behave like transmission lines for voltage pulses, which can be reflected at the motor terminals. The resulting oscillatory transient, known as the long-lead effect, can stress and consequently degrade the stator insulation system of a motor. This paper describes the results of tests to 1) determine the correlation between peak motor voltage and the length of motor leads and 2) determine the correlation between peak motor voltage and the switching frequency of the ASD

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불평형 전압으로 운전시 비선형 부하에 나타나는 현상 (The Phenomena Giving Rise of Nonlinear Load Operated by Unbalance Voltage)

  • 김종겸;이은웅
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제51권6호
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    • pp.285-291
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    • 2002
  • In general, utility voltage is maintained at a relatively low level of Phase unbalance since a low level of unbalance can cause a significant power supply ripple and heating effects on the power system equipment. Voltage unbalance more commonly emerges in individual customer loads due to phase load unbalanced, especially where single phase power loads are used. Under unbalanced input voltages large lower order harmonics appears at the input and output ports of Power conversion devices. As the application of adjustable -speed drives (ASDs) and their integration with complex industrial processes increase, so does the need to understand how ASDs perform during voltage This paper describes a real load test to investigate the performance of 3-HP adjustable speed drives by an unbalanced voltage at the low-voltage system.

산업용 서보 구동 시스템을 위한 자동 P/PI 속도 제어기 설계 (Automatic P/PI Speed Controller Design for Industry Servo Drives)

  • 배상규;석줄기;김경태;이동춘
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제52권12호
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    • pp.616-623
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    • 2003
  • Conventional P/PI speed controller of today's servo drives should be manually tuned the controller switching set-point by trial-and-errors, which may translate the drive system down-time and loss of productivity. The adjustable drive performance is heavily dependent on the quality of the expert knowledge and becomes inadequate in applications where the operating conditions change in a wide range, i.e., tracking command, acceleration/deceleration time, and load disturbances. In this paper, the demands on simple controls/setup are discussed for industry servo drives. Analyzing the frequency content of motor torque command, P/PI control mode switching is automatically performed with some prior knowledge of the mechanical dynamics. The dynamic performance of the proposed scheme assures a desired tracking response curve with minimal oscillation and settling time over the whole operating conditions. For comprehensive comparison of traditional P/PI control scheme, extensive test is carried out on actual servo system.

가변속 전력구동시스템 관련 특수 시험방법을 포함한 EMC 제품규격에 관한 연구 (A Study on EMC Product Standard Including Specific Test Methods Related to Adjustable Speed Electrical Power Drive Systems)

  • 홍순찬;서영민;김경원
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2002년도 전력전자학술대회 논문집
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    • pp.99-103
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    • 2002
  • IEC 61800 is an international standard on adjustable speed electrical power drive systems, which consists of three parts. IEC 61800-1 and IEC 61800-2 apply to DC power drive systems and AC power drive systems, respectively, which include power conversion, control equipment, and also a motor or motors. IEC 61800-3 specifies EMC ( Electro Magnetic Compatibility ) requirements for adjustable speed AC or DC motor drives connected to main supplies up to AC 1,000 volts. This paper studies the standards related to EMC and the text summary of international standard IEC 61800-3 which is an EMC product standard including specific test methods.

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스위치드 리럭턴스 모터의 고성능 속도제어에 관한 연구 (High performance Speed control of Switched Reluctance Motor)

  • 송병섭;윤용호;최우석;김준호;원충연
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2001년도 전력전자학술대회 논문집
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    • pp.30-33
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    • 2001
  • Advantages of switched reluctance motor(SRM) drives make it an attractive candidate for replacing adjustable speed ac and do drives in both industrial and consumer applications. Furthermore, a simple, low cost and robust SRM drive can be efficiently operatied ill the hostile environment of an automobile. In this paper, novel topology for fast response of various load is proposed. Proposed topology adapts anti-windup PI controller at increasing speed referense and activate braking mode at decreasing speed and forward load, Experiental results show that proposed topology have fast response charecteristics at increasing and decreasing speed reference.

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Variable Speed Drives of Induction Motor for Traction Application with Modified Sliding Mode Control

  • Ryoo, Hong-Je;Kim, Jong-Soo;Rim, Geun-Hie;Dragos Ovidiu Kisck;Won, Chung-Yuen
    • Journal of KIEE
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    • 제11권1호
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    • pp.62-68
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    • 2001
  • In this paper it is proposed an advanced modified sliding mode control of a rotor field oriented control of induction motor. The application of this unconventional control has very good results, such as disturbance rejection and nice dynamic properties. Stability can be guaranteed even in the worst situation. A conventional "sliding mode" controller is characterised by fast switching control signal, which causes the chattering of the drive system. To overcome this problem, a modified law is used, by introducing a hysteresis band and a continuous control, which modifies the conventional law. The control is accomplished with dual TMS320C44 floating-point digital signal processor. The validity of the proposed method was verified by experiment on the propulsion system simulator, used for the development of Korean High-Speed Railway Train(KHSRT).in(KHSRT).

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가변속 드라이브 적용을 위해 고려해야 할 사항 (Considerations for application of Adjustable Speed Drive{ASD))

  • 김종겸;이은웅;이동주;임재일
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1996년도 추계학술대회 논문집 학회본부
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    • pp.29-31
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    • 1996
  • Industry today utilizes adjustable-speed drives for a variety of application. This paper will present general Guidelines to optimize selecting the drive or drive system for the needs of the application and introduce the user to the many items that must be covered by such industry standards in order to assure successful applications on ADS.

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자립형 이동로보트 구동을 위한 DC서보전동기 PWM속도제어 (The PWM Speed Control of DC servo Motor for Movable Robot Drives)

  • 홍순일;김채준;조철제;김철우
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1992년도 하계학술대회 논문집 B
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    • pp.1185-1187
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    • 1992
  • In this paper, PWM control is applied to the microprcessor-based adjustable speed dc motor drives. The motor drive system is composed of phase locked loop. Main drive circuit of the system is consisted of H-type bridge with switching transistors. PWM drive circuit is linearized by adding flywheeling diodes. And also. We study the optimum PWM data and period time so that it hase a nearly liner relationship between current and torque.

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