• Title/Summary/Keyword: flux weakening

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Vector Control of an Induction Motor for the Field Weakening Region Considering the Variation of Magnetizing Inductance (자화인덕턴스 변화를 고려한 약계자 영역에서의 유도전동기 벡터제어)

  • 이택기
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.13 no.2
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    • pp.39-45
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    • 1999
  • In case of field weakening region, torque is directly affected by flux. In this region, the flux reference is cIecreased inversely proportional to the rotor speed. As the flux is decreased, the magnetizing inductance is nonnally increased The increased magnetizing inductance limited voltage for controlling current In this paper, rreasuring q axis voltage in field weakening region, magnetizing inductance in flux calculating can be readjusted. Computer simulation and experiment results demostrate the efficacy of the prqx>sed rrethod. Proposed algorithm is expected to the application of the adjustable drive system in the spinning and weaving field. field.

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Outer Voltage Regulation Loop for Maximum Torque Operation of Interior Permanent Magnet Synchronous Motor in the Flux (약계자 영역에서 외부 전압제어 루프에 의한 매입형 영구자석 동기전동기의 최대 토오크 운전)

  • Kim, Jang-Mok;Sul, Seung-Ki
    • Proceedings of the KIEE Conference
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    • 1997.07a
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    • pp.121-123
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    • 1997
  • A novel flux-weakening scheme for the Interior Permanent Magnet Synchronous Motor (IPMSM) is proposed. This is implemented based on the output of the synchronous PI current regulator-reference voltage to the PWM inverter. Attractive features of this flux weakening scheme include no dependency on the machine parameters, the guarantee of current regulation at any operating condition, and smooth and fast transition into and out of the flux weakening mode without a discontinuity. Experimental results are presented to verify the feasibility of the proposed control scheme.

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Vector Control of an Induction Motor for the Field Weakening Region Considering the Variation of Magnetizing Inductance (자화인덕턴스 변화를 고려한 약계자 영역에서의 유도전동기 벡터제어)

  • ;李宅基
    • The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.13 no.2
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    • pp.171-171
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    • 1999
  • In case of field weakening region torque is directly affected by flux. In this region the flux reference is decreased inversely proportional to the rotor speed. As the flux is decreased the magnetizing inductance is normally increased. The increased magnetizing inductance limited voltage for controlling current. In this paper, measuring q axis voltage in field weakening region magnetizing inductance in flux calculating can be readjusted. Computer simulation and experiment results demonstrate the efficacy of the proposed method. Proposed algorithm is expected to the application of the adjustable drive system in the spinning and weaving field.

Field-weakening control driving characteristics of Interior Permanent Magnet Synchronous Motor (매입형 영구자석 동기전동기의 약계자 제어시 운전 특성)

  • Bang, Tae-Kyoung;Shin, Kyung-Hun;Lee, Seung-Han;Cho, Han-Wook
    • Proceedings of the KIEE Conference
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    • 2015.07a
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    • pp.83-84
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    • 2015
  • In order to use the high-speed range of Interior Permanent Magnet Synchronous Motor(same as IPMSM above), the motor should be at flux weakening control status. High-speed range is called field weakening control region or constant power region, and explain the basic theory of flux weakening control used in the constant power region. Back electromotive force of IPMSM is measured. and field weakening conrtrol driving characteristics is configurated verification test. Through experimentation speed-torque characteristic curve, the efficiency variation corresponding to the current phase angl,the efficiency map were produced.

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Study of the Method of Calculating Maximum Voltage for Flux-Weakening Operation of Interior Permanent Magnet Synchronous Motor (매입형 영구자석 동기전동기의 약계자 제어를 위한 최대전압 선정에 관한 연구)

  • Kim, Jang-Mok;Kim, Su-Yeol;Ryu, Ho-Seon;An, Yong Ho;Yoon, Gi Gab;Lim, Ik-Hun;Jun, Hyang-Sig
    • Journal of the Korean Society of Safety
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    • v.15 no.2
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    • pp.63-69
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    • 2000
  • The constraint conditions are the stator voltage and the stator current to operate the motor in the flux weakening region. The maximum current is limited by the inverter current rating and the machine thermal rating. Given DC link voltage to control the motor in the flux weakening the maximum voltage is determined by considering PWM strategy, dead time, voltage drop of the inverter switching device, and the margin of the voltage for current forcing. In this paper, the new method to determine the available maximum voltage is derived by the quantitative method and by considering the factors of the voltage drop. The proposed method to determine the maximum voltage is very useful to improve the stability of the motor system and to enlarge the speed operation region in the flux weakening operation. Therefore the utility of the maximum voltage is increased.

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Maximum Torque Operating Strategy based on Stator Flux Analysis for Direct Torque and Flux Control of a SPMSM (고정자 자속의 해석을 통한 직접 토크 제어 SPMSM의 최대 토크 운전)

  • Kim, Sang-Hoon
    • The Transactions of the Korean Institute of Power Electronics
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    • v.19 no.5
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    • pp.463-469
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    • 2014
  • This paper proposes a maximum torque operation strategy for the direct torque control of a surface-mounted permanent-magnet synchronous motor (SPMSM). The proposed method analyzes the available operation region of the stator flux of the SPMSM under voltage and current constraints. Based on this analysis, the optimal stator flux trajectory that yields the maximum torque is obtained across the entire operation region, including constant torque and constant power regions. The proposed strategy is also applicable in the flux-weakening region II operation of the SPMSM, which has no speed limit. The validity of the proposed method is verified through experiments conducted on an 800 W SPMSM drive system.

Development of an 80[kW] IPMSM Drive System for an Electric Vehicle (전기자동차용 80[kW] IPMSM 구동 시스템 개발)

  • Kim, Sang-Hoon;Park, Nae-Chun
    • Journal of Industrial Technology
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    • v.33 no.A
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    • pp.61-66
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    • 2013
  • This paper is about the development of 80[kW] IPMSM(Interior Permanent Magnet Synchronous Motor) drive system for an electric vehicle. MTPA(Maximum Torque per Ampere) operation and flux-weakening operation for the optimal torque control of the IPMSM are presented. In this system, the torque control of the IPMSM is achieved by using the look-up table, which gives d- and q-aixs current references for the given torque command in the MTPA operation and flux-weakening operation regions. This look-up table is made by current injection tests, and from which the motor parameters are also estimated. The proposed system is verified by the experiment on the electric vehicle drive system, which consists of an 80[kW] IPMSM and an IGBT inverter.

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The High Performance Flux Weakening Control of Interior Permanent Magnet Synchronous Motor (매입형 영구자석 동기전동기의 고성능 약계자 제어)

  • Lee, Jung-Ho;Kim, Jang-Mok;Won, Jong-Soo
    • Proceedings of the KIEE Conference
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    • 1993.07b
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    • pp.1051-1053
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    • 1993
  • In this paper, the new flux weakening contol algorithm for the drive system of Interior Permanent Magnet Synchronous Motor(IPMSM) is proposed which includes the feedback of torque and current The torque error is used in order to control the current phase angle in the field weakening control. The proposed control method is compared with the stator flux oriented vector control method. Through the simulation the prominence of the proposed control method is verified.

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Sensorless Vector Control for Maximum Torque of SynRM in the Field Weakening Region (약계자 영역에서 SynRM의 최대 토크제어를 위한 센서리스 벡터제어)

  • Lee, Jung-Chul;Chung, Dong-Hwa
    • Journal of the Korean Society of Safety
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    • v.17 no.2
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    • pp.32-38
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    • 2002
  • In this paper, a new approach for the SynRM(Synchronous Reluctance Motor) control which ensures producing MTPA(Maximum Torque per Ampere) over the entire field weakening region is presented. In addition, this paper presents a speed sensorless control scheme of SynRM using flux observer. Also, by adjusting the base speed for the field weakening operation according to the flux level, the current and voltage limit, the smooth and precise transition into the field weakening operation can be achieved. The validity of the proposed scheme is verified through simulation.

Speed Sensorless Vector Control of Induction Machine in the Field Weakening Region (약계자영역에서 유도전동기의 속도센서리스 벡터제어)

  • Sin, Myeong-Ho;Hyeon, Dong-Seok
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.50 no.10
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    • pp.508-512
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    • 2001
  • This paper investigates the problem of the speed estimation of conventional speed sensorless stator flux-oriented induction machine drive in the field weakening region and proposes a new speed estimation scheme to estimate speed exactly in transients in the field weakening region. The error included in the estimated rotor speed is removed by not a low pass filter but Kalman filter so that exact speed estimation in transients is achieved.

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