Improvement of Cogging Torque Characteristics of Magnetic-Geared PMSM for Railway Vehicles using Pole-piece Skew

박찬배,정거철,조익현 한국철도학회 2019 한국철도학회논문집 Vol.22 No.9

In general, the slot opening structure of a stator core generates cogging torque when the rotor rotates in apermanent magnet synchronous motor (PMSM). If the cogging torque is excessively large, it may cause vibration andnoise during operation of the PMSM. In the case of a magnetic-geared permanent magnet synchronous motor (MGPMSM),cogging torque is generated during operation of the PMSM because the outer rotor, made of magnetic material,and the inner rotor, in which the permanent magnet is inserted, are arranged in double. Therefore, in this study, the skewtechnique, generally used in electric motors, is applied to reduce the cogging torque of MG-PMSM. The design of theMG-PMSM is first studied for the application to a railway vehicle driving system of an MG-PMSM structurally integratedwith a magnetic gear and a PMSM. In addition, a method is studied to structurally reduce the cogging torque ofthe MG-PMSM simply by skewing the pole pieces of a low speed rotor made of magnetic material.

적응형 노치 필터에 의한 PMSM을 이용한 선형 피드 시스템의 진동 억제

이동희 전력전자학회 2006 전력전자학회 논문지 Vol.11 No.3

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. Permanent Magnet Synchronous Motor(PMSM)는 볼스크류, 기어 및 타이밍 벨트를 이용하여 NC, 가공기, 로봇 및 공장 자동화를 포함하여 산업 시스템 전반에 널리 사용되고 있다. 이러한 PMSM과 부하의 결합으로 구성된 시스템은 동력의 전달에 있어서, 고유의 공진 주파수를 가지며 공진 주파수 대역에서의 기계계의 응답 특성은 매우 불안정하고, 기계 시스템의 손상을 일으키게 된다.본 논문에서는 PMSM을 이용한 직선 운동 시스템에서 기계적인 결합에 의한 기구부의 진동을 억제하기 위하여 진동 주파수를 자동으로 검출하여, 진동의 원인이 되는 토크 지령 신호를 억제하는 적응형 노치 필터를 포함하는 속도 제어 시스템을 제안한다. 하지만, 기계적인 진동 주파수와 주파수의 대역은 전동기에 결합된 결합 기구 및 부하에 따라서 변동하는 특성을 가지고 기계적인 진동의 크기도 진동원이 되는 신호에 따라 변동하므로, 이를 적응형 노치 필터부에서 이를 진단하여 진동 주파수를 자동으로 억제함으로써 안정적인 운전이 가능하도록 설계된다.본 논문에서 제안된 기계적인 진동을 억제하기 위한 적응형 노치 필터의 성능은 시뮬레이션 및 실험을 통하여 검증하였다.

300W급 이중 공극 구조 PMSM 설계 및 출력 특성에 관한 연구

김승주(Seung-Joo Kim),김윤환(Youn-Hwan Kim),최한석(Han-Suk Choi),문재원(Jae-Won Moon) 한국조명·전기설비학회 2014 조명·전기설비학회논문지 Vol.28 No.4

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.

PMSM의 저속운전 및 기동성능 개선을 위한 선형 엔코더

이동희,송달섭,원태현 동의공업대학 2001 論文集 Vol.27 No.1

PMSM(Permanent Magnet Synchronous Motor) drives are widely used in the industrial applications and home appliances because of high torque ratio, high efficiency and precise control performance. In recent years there has been a significant development of PMSM motors of various kinds. Improvements in the properties of permanent magnet materials have increased the viability of related types of motors. However, precise speed and position information is essential for the good control performance. In order to produce correct torque, the rotor flux position information from position sensor has to be identified. In this paper, a low cost position sensor is proposed for improving of starting and low speed performance of PMSM. The proposed position sensor produces a linear analog signal that is proportional to the electrical rotor position. The information of initial rotor position at the starting instance and accurate position in the low speed can be obtained with the proposed encoder. The performance of the proposed encoder is verified with experimental results.

비희토류 전동기의 효율 향상을 위한 Fan-shape type PMSM 설계 및 성능 분석

조수영(Sooyoung Cho),안한웅(Hanwoong Ahn),함상환(Sang-Hwan Ham),진창성(Chang-Sung Jin),이성구(Sung Gu Lee),이주(Ju Lee) 대한전기학회 2016 전기학회논문지 Vol.65 No.2

The rare earth output is concentrated in limited number of countries including China. Also the necessity for development of non-rare earth motor is getting signified due to the rapid increase of rare earth price and resource weaponizing policies. Non-rare earth motor is generally designed as spoke type PMSM (Permanent Magnet Synchronous Motor) in order to maximize the power density. Such spoke type PMSM has advantage in concentrating the flux but demonstrates lower efficiency compared to permanent magnet using Nd (Neodymium) permanent magnet. Therefore, applications with strong necessity for efficiency need rotor structure having improved efficiency compared to spoke type PMSM. Hence, this study suggested fan-shape type PMSM with somewhat lower power density but maximized efficiency. Fan-shape type PMSM is a rotor shape demonstrating outstanding reduction of iron loss compared to existing spoke type. Thus, this study analyzed the improvement of efficiency and reduction of loss arising from the suggested shape through parameter calculation.

강화학습과 외란관측기 기반 PMSM 제어 성능 향상 연구

박온유(Onyou Park),임완수(Wansu Lim) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11

본 논문은 영구자석동기모터(Permanent Magnet Synchronous Motor, PMSM)의 자속기준제어(Field Oriented control, FOC) 효율성을 높이기위해 강화학습과 외란관측기를 사용한 제어전략을 제시한다. PMSM은 높은효율성과 정밀한 제어로 인해 다양한 산업분야에서 사용한다. 그러나 PMSM의 비선형 동작과 외부 간섭을 고려한 최적의 모터 속도 제어는 여전히 해결해야 할 문제로 남아있다. 따라서 PMSM의 최적 제어를 위해 본 논문은 외란관측기를 이용하여 외부 부하토크를 추정하고 이를 상쇄하는 q축 전류를 계산한다. 또한 제안한 강화 학습은 모터 비선형 동작을 극복하고 최적의 모터 전압을 생성해 PMSM 속도에 빠르게 응답하고 오버슈트를 감소시킨다.

PMSM의 제동력 확보에 의한 회생제동 제어에 관한연구

황락훈(Hwang, Lak-Hun) 한국산학기술학회 2012 한국산학기술학회논문지 Vol.13 No.2

본 연구는 전동차를 운전 시, 영구 자석형 동기전동기(PMSM)가 제동할 때 발생한 회생전력은 모두 활용하 며, 전기제동에 대하여도 발생한 회생전력을 모두 흡수할 수 있는 능력을 가진 축소모형 전동기 시스템으로 운전함을 가정한다. 축소모형 전동기의 견인시스템은 각 전동기는 영구 자석형 동기전동기(PMSM)를 개별로 제어하는 1C1M방 식으로 구축 하였다. 전동차의 승차감 향상 및 에너지의 효율적 이용 등을 위한 방법으로써 벡터제어 방법을 적용하 여 관성부하에 대한 시뮬레이션과 축소모형으로 실험을 하여 좋은 결과를 얻었다. 또한, 영구 자석형 동기전동기 (PMSM)의 제동력 확보에 의한 회생제동 제어 확보와 전기제동으로 정지하는 극 저속에서의 속도검출과 전동기를 제어하는 방법의 알고리즘에 대하여 연구 하였다. In this paper, a blind spot of motor car, and the put case that is driven the miniature model motor system, when make practical application of the permanent magnet synchronous motors(PMSM) braking and having had the ability that can all absorb regenerative power by means of electric brake which is occurred. a tow system of a miniature model motor traction system is established by 1C1M methods to control individually permanent magnet synchronous motors (PMSM) of each motor. vector control method is applied in order to improve ride quality of motor car and the efficient use of energy. it was obtained excellent experiment results from the simulations as a function of momentum load and miniature model. Also, this study is investigated the regenerative braking power securities of permanent magnet synchronous motors, speed detection to stop electric brake at extremely very low speed and motor control method of algorithm.

Sensorless PMSM Control with Sliding Mode Observer Based on Sigmoid Function

Ren Ningning,Fan Le,Zhang Zan 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.2

It is impossible to install or apply position sensors appropriately in some special applications of PMSM. Sensorless PMSM control is an appropriate choice to solve some problems in the control of PMSM. It is necessary to acquire an estimated position precisely and avoid the chattering phenomenon for sensorless PMSM control. This paper proposes an algorithm for estimating position with sliding mode observer (SMO) based on sigmoid function, and a suffi cient condition that leads SMO into a sliding surface is acquired using Lyapunov stabilization analysis. The outcome of this study shows that SMO based on sigmoid function for sensorless PMSM control can estimate position with high precision and avoid chattering phenomenon under the condition of diff erent velocity and load. However, the estimated position needs to be compensated for according to load, and the compensating value is in proportion to the value of the current.

인터넷 웹 기반의 PMSM원격제어시스템

김대현,최양광,김영석 대한전자공학회 2004 電子工學會論文誌-SC (System and control) Vol.41 No.2

산업이 발전되어감에 따라 일반 가정에서 산업의 각 분야에 이르기까지 각종 전동기의 사용이 증가하고 있으며, 그 종류도 날로 다양해지고 있다. 이러한 이유로 산업전반에 널리 보급된 인터넷을 이용하여, 가변속 구동 시스템에 대해 원격조작하고, 일괄 관리하거나 실시간으로 관리기기의 상태를 파악하고, 데이터를 수집, 처리하는 것이 요구된다. 또한 인터넷을 통해 기기를 직접 제어, 관리함으로써 시간과 공간, 비용절감의 측면에서 큰 효과를 기대 할 수 있다. 따라서 본 논문에서는 인터넷 웹 기반의 PMSM 원격제어시스템 개발을 연구하였다. 인터넷을 이용한 원격제어를 위해 DSP 제어기 및 TCP/IP를 사용한 클라이언트/서버 시스템과 PMSM의 상태와 Data를 확인할 수 있는 웹 인터페이스를 개발하였다. 이 시스템은 웹 기반의 관리 프로그램을 통해 실시간으로 PMSM의 기동, 정지 및 가변속에 대한 제어와 모니터링이 가능하다. As the industry is developed, uses of various electric motor are increasing from general home to various fields of industry, and the kind becomes various daily. For these reasons, it is required to study the remote control and a package management about change of a speed drive system the supervision of administration appliance by real time, and the collection and process data together using internet prevailed on industry whole. Also, we can expect big effect in time and space, side of cost-cutting by control directly and manage appliance through internet. This paper deals with the development of a Web-Based remote control system for permanent magnet synchronous motor drives. The client/server system using TCP/IP protocols and DSP controller for remote control through internet and the Web interface that users can confirm data and state of PMSM is developed. This system is available for driving, braking, variable speed control and monitoring for PMSM in real time through administration program of Web-Based.

치과 핸드피스용 고속 PMSM의 정현파 구동을 위한 인버터 직류 링크전압 제어기법

전금상(Geum-Sang Jeon),박상욱(Jae-Seung Park),박재성(Jae-Seung Park),김상희(Sang-Hee Kim),안희욱(Hee-Wook Ahn) 한국기계가공학회 2013 한국기계가공학회지 Vol.12 No.4

This paper presents a DC link voltage control method to reduce the ripple current and the switching loss in the sinusoidal current drive system for the wide-speed range PMSM. The DC link voltage of the three phase inverter in the sinusoidal current drive system is designed by the back-EMF voltage at maximum speed of the PMSM. In general, the drive systems have used the constant DC link voltage without reference to the motor speed. The current ripple causes hysteresis loss and makes noise. In addition, the switching loss on the inverter increases in proportion to the rise in the DC link voltage. In this paper, we propose the variable DC link voltage control method to reduce the current ripple in the PMSM drive system. We show reduction effect of the current repple and the switching loss through simulation results.