• Title/Summary/Keyword: PMSM

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Estimation of Back EMF for the Sensorless Controlled High Speed PMSM (센서리스 제어 고속 동기전동기의 역기전력 추정)

  • Lee, Jin-Woo
    • Proceedings of the KIPE Conference
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    • pp.114-115
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    • 2013
  • This paper proposes an estimation method of back emf for the sensorless controlled high speed PMSM drive in turbo compressors with air bearings. The back emf of PMSM motor varies due to the temperature variation, which deteriorates the control performance of sensorless controlled PMSM drives. The proposed method is based on the current model of the PMSM motor. The simulation results show that the proposed method estimates the back emf of sensorless controlled PMSM drives with reasonable accuracy for parameter adaptation.

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Maximum Torque Control of PMSM Drive in Field weakening Region (약계자 영역에서 PMSM 드라이브의 최대 토크제어)

  • 이홍균;이정철;김종관;정동화
    • Journal of the Korean Society of Safety
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    • v.18 no.1
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    • pp.44-49
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    • 2003
  • Permanent magnet synchronous motor(PMSM) is widely used in many applications such as an electric vehicle. compressor drives of air conditioner and machine tool spindle drives. PMSM drive system have become a popular choice in various application, due to their excellent power to weight ratio. This paper is proposed maximum torque control for field weakening operation of PMSM drive. At low speeds, the reluctance torque is used to maximize the output for a given current level. This is achieved maximum torque per ampere(MTPA) by selecting an optimal value of the direct stator current component. At high speeds, the system reaches a point at which the inverter will not be able to supply the desired voltage. In this case it is necessary to make use of an increased value the direct current component. The proposed control algorithm is applied to PMSM drive system, the operating characteristics controlled by maximum torque control are examined in detail by simulation.

Sensorless Control of a Permanent Magnet Synchronous Motor based on an Instantaneous Reactive Power in the Field-Weakening Region (약계자 영역에서의 순시무효전력을 이용한 PMSM의 센서리스 제어)

  • Lee Jeong-Hum;Kim Young-Seok;Choi Yang-Kwang
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.54 no.2
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    • pp.71-80
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    • 2005
  • This paper presents the position sensorless vector control of a cylindrical permanent magnet synchronous motor(PMSM) in the field weakening region. The position sensorless algorithm using an instantaneous reactive power of the PMSM is proposed. An instantaneous reactive power can be obtained from the vector product of rotor currents and back emf of the PMSM. Back emf includes the information of rotor speed. So the estimated speed can be yielded from the voltage equation of the PMSM. In other words, the estimated speed is compensated by using an instantaneous reactive power. To extend the speed range of the PMSM in the constant horsepower region, the field weakening control is applied. The proposed algorithm is not affected by mechanical motor parameters because the mechanical equation is not used. The effectiveness of the proposed algorithm is verified by the experimental results.

Modelling analysis and simulation of vector control PMSM drive system (PMSM 드라이브 시스템의 벡터제어 모델링 분석 및 시뮬레이션)

  • Cha, Han-Ju;Lee, Wu-Jong;Vu, Trung-Kien
    • Proceedings of the KIEE Conference
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    • pp.1003_1004
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    • 2009
  • 본 논문에서는, Matlab/Simulink를 사용하여 영구자석 동기전동기(PMSM)의 벡터제어 및 제어기설계에 대하여 기술하겠다. dq모델의 수학적 해석을 바탕으로 PMSM드라이브의 전류제어와 속도제어기에 Lag- controller를 사용하였다. Black block models과는 다른 시뮬레이션으로 모든 매개변수에 대해서 제어와 증명을 쉽게 할 수 있다. Matlab/Simulink로 로드 토크가 있는 PMSM을 증명하고 그 결과 값을 알아보았다.

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Analysis and Simulation of Vector Control for PMSM using Matlab/Simulink (Matlab/Simulink을 이용한 PMSM 백터제어 시뮬레이션 및 해석)

  • Vu, Trung-Kien;Cha, Han-Ju
    • Proceedings of the KIEE Conference
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    • pp.145-147
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    • 2008
  • In this paper, the implementation of the Permanent Magnet Synchronous Machine (PMSM) model based on the Matlab/Simulink is described. Due to the analysis of the mathematical dq-modeling, a vector controlled PMSM drive simulation is approached. With the simulated system, unlike in black block models, all machine parameters are accessible for control and verification. Based on the Matlab/Simulink, the model of the PMSM with load torque is established, the simulation is studied and some conclusions are given.

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A Study on Output and Design of Permanent Magnet Synchronous Motor with Dual-gap (300W급 이중 공극 구조 PMSM 설계 및 출력 특성에 관한 연구)

  • Kim, Seung-Joo;Kim, Youn-Hwan;Choi, Han-Suk;Moon, Jae-Won
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.28 no.4
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    • pp.80-87
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    • 2014
  • This paper suggests the dual-gap for generating power and increasing the torque of a direct-drive permanent magnet synchronous motor in a hybrid-cycle. To consider easy coil winding, we applied a structure of dual-gap for the permanent magnet synchronous motor (PMSM). Because the torque of PMSM with the dual-gap is very large, we are designed the appropriate specifications of the PMSM by selected the appropriate dual-gap slot and poles combination. The prototype model is selected by design theory for increasing torque and maximizing output power of PMSM. And the detailed structure design of the model was designed by the loading distribution method. The PMSM models were analyzed by finite element method. Finally, we have suggested appropriate rotor structure has benefit to further increasing torque and prevent decreasing of the output power in PMSM with dual-gap.

A Vibration Rejection of Linear Feeder System with PMSM using Adaptive Notch Filter (적응형 노치 필터에 의한 PMSM을 이용한 선형 피드 시스템의 진동 억제)

  • Lee, Dong-Hee
    • The Transactions of the Korean Institute of Power Electronics
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    • v.11 no.3
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    • pp.274-283
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    • 2006
  • The Permanent Magnet Synchronous Motor(PMSM) drive systems with ball-screw, gear and timing-belt are widely used in industrial applications such as NC machine, machine tools, robots and factory automation. These systems have torsional vibration in torque transmission from servo motor to mechanical load due to the mechanical couplings. This vibration makes it difficult to achieve quick responses of speed and may result in damage to the mechanical plant. This paper presents adaptive notch filter with auto searching function of vibration frequency to reject the mechanical vibration of linear feeder system with PMSM. The proposed adaptive notch filter can suppress the torque command signal of PMSM in the resonant bandwidth for reject the mechanical torsional vibration. However, the resonant frequency can vary with conditions of mechanical load system and coupling devices, adaptive notch filter can auto search the vibration frequency and suppress the vibration signal bandwidth. Computer simulation and experimental results shows the verification of the proposed adaptive notch filter in linear feeder system with PMSM.

Improved Performance of Sensorless PMSM in Low Speed Range Using Variable Link Voltage (가변 링크전압에 의한 센서리스 PMSM의 저속운전 성능개선)

  • Lee, Dong-Hee;Kwon, Young-Ahn
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.49 no.10
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    • pp.708-711
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    • 2000
  • Sensorless PMSM is much studied for the industrial applications and home appliances because a mechanical sensor reduce reliability and increase cost. Most of sensorless algorithms are based on motor equations, and so the magnitude of phase voltage and current should be exactly obtained. However, the inverter output voltage applied to PMSM has relatively large error in the low speed range, and a relatively poor response is shown in the low speed range. This paper investigates the improved performance of sensorless PMSM in the low speed range. This paper proposes the error reduction of inverter output voltage which is realized through the variable link voltage. The proposed algorithm is verified through simulation and experiment.

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Development of PMSM for Electric Drive Compressor Part 2 : Reduction of Noise Level (전동식 압축기용 영구자석 동기전동기 개발 Part 2 - 소음저감)

  • Lee, Jung-Kyung;Koo, In-Hwe;Lee, Geun-Ho;Lee, Je-Hie;Yeo, Hyeong-Gee
    • Proceedings of the KSME Conference
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    • pp.2594-2599
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    • 2008
  • This study deals with the development of PMSM(Permanent Magnet Synchronous Motor) for automotive EDC(Electric Drive Compressor). We have already developed the previous version of PMSM. It showed the characteristics of small size and high efficiency. But noise and vibration levels were higher than target values, so it was impossible to apply. So, in order to reduce noise and vibration levels, many parameters like the numbers of slots, the numbers of winding turns, and slot open width were changed. As a result, noise level of newly developed PMSM was decreased about 36.9% at maximum operating frequency (8600 rpm), and was reduced about 37.7% at rated frequency (6000 rpm) with the same sized and more efficient PMSM.

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Design of Cooling System for Variable Speed 300kW PMSM (300kW 급 가변속 PMSM의 냉각시스템 설게)

  • Zhou, Guang-xu;Lee, Dong-Hee;Ahn, Jin-Woo;An, Young-Joo
    • Proceedings of the KIEE Conference
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    • pp.923-924
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    • 2007
  • due to the modification of ventilation system for variable speed high efficiency PMSM, the ventilation structure is analyzed in this part. First, a cooling structure was proposed for the variable speed PMSM. Through the contrast result of whole stress and speed distribution in the cooling channel by fluid field, the fans setting fashion is confirmed. By the studying of cooling structure for improved PMSM, the position of the cooling hole in the rotor is optimized by the finite element method. At last, the thermal field distribution of the motor is calculated by FEM. The calculated thermal rise is in accord with measured value, which provides effective basement for the design and safety operation of PMSM.

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