부하각을 고려한 이중회전자 영구자석 동기전동기의 약자속 제어 해석

김진영(Jin-Young Kim),김성훈(Seong-Hoon Kim),조관열(Kwan-Yuhl Cho),김학원(Hag-Wone Kim),이상민(Sang-Min Lee),박찬배(Chan-Bae Park) 전력전자학회 2024 전력전자학회 논문지 Vol.29 No.3

The double rotor PM synchronous motor(DR-PMSM) has been studied to reduce the mechanical losses and maintenance of the mechanical speed reducers in a railway vehicle driving system. DR-PMSM consists of a non-contact magnetic gear with two rotors, PM rings, and three phase stator windings. The torque of DR-PMSM depends on the load angle between inner and outer rotors as well as the field flux and stator currents. The high-speed operating ranges of DR-PMSM can be extended by flux weakening control, such as the conventional three-phase PM synchronous motor. The available dq currents in the flux weakening mode are restricted by the current limit circle and the voltage limit ellipse. The center of the voltage limit ellipse for DR-PMSM is not fixed but shifts depending on the load angle, whereas that for the conventional single rotor PMSM is fixed. This study analyzes the operating point of dq currents for the given speeds and load torque under flux weakening mode of DR-PMSM. Additionally, the operating characteristics of flux weakening control are verified through Matlab/Simulink simulation and 1kW DR-PMSM experiment.

적응제어기를 이용한 영구자석 동기전동기의 속도 제어

정진우(Jin-Woo Jung),김태형(Tae Heoung Kim) 대한전기학회 2011 전기학회논문지 Vol.60 No.5

This paper proposes a new adaptive speed controller to achieve a robust speed control of a permanent magnet synchronous motor(PMSM). The proposed adaptive regulator does not require any information on the motor parameter and load torque values, so it is very insensitive to model parameter and load torque variations. Also, the stability of the proposed adaptive control system is proven. To validate the robustness of the proposed adaptive speed controller, both simulation and experimental results are provided under motor parameter and load torque variations. It is clearly demonstrated that the proposed adaptive regulator can accurately control the speed of permanent magnet synchronous motors.

Comparison of Characteristics of Double-Sided Permanent-Magnet Synchronous Motor/Generator According to Magnetization Patterns for Flywheel Energy Storage System Using an Analytical Method

Kwan-Ho Kim,Hyung-Il Park,Seok-Myeong Jang,Jang-Young Choi IEEE 2015 IEEE transactions on magnetics Vol.51 No.3

<P>The flywheel energy storage system (FESS) is a very promising energy storage technology used in recent years because of its advantages, such as high energy density and large instantaneous power. In the case of a permanent-magnet (PM) synchronous motor/generator (PMSM/G) used for driving the FESS, a reduction in torque ripple is necessary because operating ranges are high speed. In this paper, we study the use of a double-sided PMSM/G for driving the FESS to considerably reduce iron loss that occurs in the idling mode. To develop an appropriate model for sinusoidal wave operation, we compare the characteristics of a double-sided PMSM/G having a Halbach magnetized PM and a parallel magnetized PM using an analytical method. On the basis of the compared results, the most suitable model for sinusoidal wave operation is manufactured.</P>

표면 부착형 영구자석 동기전동기의 퍼지 속도제어

정진우(Jin-Woo Jung),최영식(Young-Sik Choi),유동녕(Dong-Young Yu) 한국조명·전기설비학회 2010 조명·전기설비학회논문지 Vol.24 No.12

This paper proposes a new fuzzy speed controller to precisely regulate the speed of a surface-mounted permanent magnet synchronous motor(SPMSM). The proposed fuzzy controller needs the knowledge of the load torque to realize its robust and accurate control, thus the first-order load torque observer is adopted to estimate it. It is analytically confirmed that the overall control system containing the fuzzy speed controller and the load torque observer is exponentially stable. To prove the validity of the proposed fuzzy speed controller, the simulation and experimental results are shown. It is concluded that the proposed control scheme can be employed to accurately control the speed of a SPMSM motor.

영구자석 동기전동기의 퍼지 속도제어기 설계

정진우(Jin-Woo Jung),김태형(Tae Heoung Kim) 대한전기학회 2010 전기학회논문지 Vol.59 No.10

This paper proposes a new fuzzy speed controller based on the Takagi-Sugeno fuzzy method to achieve a robust speed control of a permanent magnet synchronous motor(PMSM). The proposed controller requires the information of the load torque, so the second-order load torque observer is used to estimate it. The LMI condition is derived for the existence of the proposed fuzzy speed controller, and the LMI parameterization to calculate the gain matrices of the controller is provided. It is proven that the augmented control system including the fuzzy speed controller and the load torque observer is exponentially stable. To evaluate the performance of the proposed fuzzy speed controller, the simulation and experimental results are presented under motor parameter and load torque variations. Finally, it is clearly verified that the proposed control method can be used to accurately control the speed of a permanent magnet synchronous motor.

영구자석 동기전동기의 벡터 제어를 위한 퍼지 각가속도 관측기 기반의 퍼지 속도제어기

정진우(Jin-Woo Jung) 대한전기학회 2011 전기학회논문지 Vol.60 No.2

This paper presents a new fuzzy speed controller based on a fuzzy angular acceleration observer to realize a robust speed control of permanent magnet synchronous motors(PMSM). The proposed speed controller needs the information of the angular acceleration, thus the first-order fuzzy acceleration observer is designed. The LMI existence condition is given for the proposed fuzzy speed controller, and the gain matrices of the controller are calculated. It is verified that the augmented control system consisting of the fuzzy speed controller and the fuzzy acceleration observer is mathematically stable. To validate the effectiveness of the proposed acceleration observer-based fuzzy speed controller, the simulation and experimental results are shown under motor parameter variations. It is definitely proven that the proposed control scheme can precisely track the speed of a permanent magnet synchronous motor.

SBW 반력 장치용 모터의 코깅 토크, 토크 리플 및 전자기력 고조파 저감을 위한 회전자 형상에 따른 비교 연구

원윤재(Yun-Jae Won),안수민(Soo-Min Ahn),김재현(Jae-Hyun Kim),임명섭(Myung-Seop Lim),김두영(Doo-Young Kim) 한국자동차공학회 2022 한국자동차공학회 부문종합 학술대회 Vol.2022 No.6

In this paper, the development of steering system and SBW (Steer by wire) system are introduced. Also, designs for reducing cogging torque, torque ripple and electromagnetic force harmonics that affect vibration in the motor for reaction force device used in the system of SBW are studied. In addition, according to rotor shape, three types of motors are designed to reduce vibration considering the same design specifications. First, it is designed as a SPMSM (Surface-mounted permanent magnet synchronous motor) type that is advantageous in terms of control. Second, it is designed as an IPMSM (Interior permanent magnet synchronous motor) type advantageous for power density. Third, in order to reduce the use of permanent magnets, it is designed as a CP-PMSM (Consequent pole permanent magnet synchronous motor) type. Using the FEA (Finite Element Analysis), the design parameters that affect cogging torque, torque ripple and electromagnetic force harmonics are identified. Then, the optimal design is carried out by selecting the objective function and constraint conditions. The optimal design result based on the surrogate model depends on how well the surrogate model simulates the performance. Therefore, in the optimal design, an surrogate model is created using the kriging method, and the predicted performance is verified to match the true value. Finally, the performance of these three types of motors is compared to suggest a motor type suitable for SBW.

로타리 압축기의 진동저감을 위한 영구자석 동기전동기의 토크제어

조관열 忠州大學校 2007 한국교통대학교 논문집 Vol.42 No.-

The single piston rotary compressor with PM synchronous motor is generally applied to air-conditioners due to its high efficiency and low cost. The single piston rotary compressor is, however, suffered by low speed operation due to its large mechanical vibration at low speeds, whereas the low speed operation of the compressor is highly required for high efficient operation in air-conditioner. The mechanical vibration of the single piston rotary compressor is caused by large pulsating torque during one mechanical rotation of the piston. In this paper, the torque control with compensating pulsating load torque is presented. The load torque is estimated by the load torque observer and corresponding currents for pulsating load torque are compensated to the current reference. The simulation results show that the proposed algorithm reduces the speed ripples of a PM synchronous motor at low speeds.

영구자석 동기전동기의 제동 알고리즘

조관열,양순배,홍찬희 전력전자학회 2002 전력전자학회 논문지 Vol.7 No.4

A braking algorithm for a PM synchronous motor is presented. The resistance of the stator windings operates as a braking resistors and dissipates the regenerated power from the rotor without any braking components including the electronic power components and control circuits. The proposed braking algorithm maximizes the power dissipation in the stator windings and also generates the maximum braking torque under the limit conditions of DC link capacitor voltage and inverter currents so that it can minimize the braking time. 영구자석 동기전동기의 제동 알고리듬을 제안한다. 전동기의 고정자 저항을 제동저항으로 사용함으로써 전동기의 운동에너지를 부가적인 제어회로 없이 고정자 권선에서 소모한다. 제안된 제동 알고리듬은 고정자권선에서 전력소모를 최대화하고 DC 링크 콘덴서전압 제한 및 인버터 전류제한 조건하에서 최대의 제동토크를 발생하여 제동시간을 최소화 할 수 있다.

영구자석 동기전동기의 상수변동을 보상한 센서리스 제어

양순배,조관열,홍찬희 전력전자학회 2002 전력전자학회 논문지 Vol.7 No.6

A sensorless control of a PM synchronous motor with the compensation of the motor parameter variation is presented. The rotor position is estimated by using the d-axis and q-axis current errors between the real system and motor model of the position estimator. The stator resistance is measured at low speeds when the motor changes its rotating direction and the variation of the stator resistance and back emf constant caused by the temperature variation is compensated. The gains in the position estimator are also adapted according to the motor speeds. 영구자석 동기전동기의 전동기상수 변동을 보상한 센서리스 제어를 제안한다. 실제시스템의 d축 및 q축 전류와 위치 예측기의 전동기 모델의 d축 및 q축 전류의 차이를 이용하여 회전자의 위치를 예측한다. 전동기가 회전방향을 바꿀 때 발생하는 낮은 속도에서 고정자 저항을 검출하고 온도변화에 의한 고정자 저항 및 유기전압 상수의 변동을 보상한다. 또한 회전자 위치 예측기의 이득은 전동기 속도에 따라 보상된다.