복소 벡터 동기좌표계 비례 적분 전류 제어기의 안티 와인드업 이득 설정

유현재,정유석,설승기 전력전자학회 2006 전력전자학회 논문지 Vol.11 No.5

This paper presents an anti-windup gain selection method for a complex vector synchronous frame PI current controller. The complex vector PI current controller is more robust to the parameter variation than the state feedback decoupling PI current controller. The complex vector PI current controller also includes an integral term, which can results in windup problem when the controller is saturated due to physical limitation of the system. Furthermore, even an anti-windup is utilized, inappropriate gain can deteriorate the performance of the current controller. Therefore, appropriate anti-windup gain selection method for a complex vector current controller has been proposed based on the mathematical description of the current control system. The superior performance of the current control system with the proposed anti-windup gain has been verified by the experimental results. 본 논문에서는 복소 벡터 동기 좌표계 비례 적분(PI) 전류 제어기의 안티 와인드업(anti-windup)이득 설정에 대해 논의한다. 복소 벡터 동기 좌표계 비례 적분 전류 제어기는 시스템 제정수 변동에 기존의 비례 적분 전류 제어기 보다 더 강인한 특성을 보인다. 복소 벡터 전류 제어기 역시 적분기를 포함하고 있으며, 엑츄에이터(actuator)의 물리적인 한계로 전압이 포화되는 경우에는 안티 와인드업이 필요하게 되고, 적절치 못한 안티 와인드업 이득 설정은 제어 시스템의 동특성을 저하시킬 수 있다. 따라서 복소 벡터 동기 좌표계 비례 적분 전류 제어기에 적합한 안티 와인드업 이득을 제안하였고, 제안된 알고리즘의 유효성은 실험을 통하여 검증하였다.

하이브리드 제어기를 사용한 유도전동기 벡터제어

류경윤,이홍희 전력전자학회 2000 전력전자학회 논문지 Vol.5 No.4

벡터제어기법은 유도전동기의 고성능 운전을 위해 널리 사용되고 있다. 벡터제어기법을 사용해 전동기의 속도제어를 행할 정우 전동기의 속도나 전류를 제어하기 위해 주로 PI제어기가 사용되고 있다. 이 경우 유도전동기의 동 특성은 PI제어기의 이득과 밀접한 관계를 갖고 있으며 유도전동기의 고성능제어를 위해서는 PI제어기의 이득을 최적화 시킬 필요가 있다. 그러나 PI제어기의 이득을 최적화 시키기 위해서는 전동기제이 시스템의 등가모델을 정확히 알아야 하기 때문에 변동 부하조건하에서 일관성 있는 최적 이득값을 얻기란 대단히 힘들다. 본 논문에서는 이러한 PI제어기의 단점을 보완하기 위해 과도상태만을 제어하기 위한 간략화된 퍼지제어기와 정상상태 제어를 위한 기존의 PI제어기를 병렬로 구성한 하이브리드 제어기를 제안하고 이를 실제 유도전동기의 벡터제어에 적용하여 알고리즘의 타당성을 검증하였다. The vector control scheme is usually applied to the high performance induction motor drives. The PI controller is adopted traditionally to control the motor speed and currents in the vector control scheme. In this case, the dynamic performance of the induction motor is dependent on the PI gains and the gain optimization is necessary in order to get a good dynamic performance. But, it is very hard to optimize the PI gains uniquely within the speed control range because the equivalent model of the motor control system should be known exactly. In this paper, we propose the hybrid control scheme to remove the defects of PI controller. The hybrid control scheme includes the simplified fuzzy controller which operates in the transient state and the PI controller which operates in the steady state. The proposed scheme is applied to the vector control for induction motor, and the digital simulation and the experimental results are given to verify the proposed scheme.

Two‑vector predictive current control strategy based on maximum torque per ampere control for PMSMs

Duo Jin,Housheng Zhang,Shengjie Zhu,Ao Wang,Junjie Jiang 전력전자학회 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.8

In permanent magnet synchronous motor systems with double closed-loop maximum torque current ratio control, a PI adjuster is used as the current inner ring. Unfortunately, the current may not be tracked effectively due to controller saturation when the load suddenly changes. To counteract this effect, a novel two-vector predictive current control strategy based on maximum torque current ratio control is proposed in this paper. The control strategy introduces the model predictive current control of two voltage vectors based on maximum torque per ampere control, which is acted upon by two voltage vectors in one control period. The second selected vector is no longer limited to the null vector. The orientation and amplitude of the synthesized virtual voltage vector are adjustable. Simulation results indicate that the proposed control method has the advantages of maximum torque per ampere control and model predictive control. It optimizes the stability of the system and reduces the fluctuation of the stator current.

매입형 영구자석 동기전동기의 속응성 향상을 위한 비특이 터미널 슬라이딩 모드 속도 제어와 벡터제어에 관한 연구

김현우,노영우 대한전기학회 2023 전기학회논문지 Vol.72 No.12

In this paper, the vector control and non-singular terminal sliding mode control (NTSMC) of interior permanent magnet synchronous motor (IPMSM) are proposed to improve the fast dynamic response and robustness. A proportional-integral (PI) control system is usually used as the speed controller of IPMSM since the simple structure. However, since a gain of PI controller is determined by the motor parameters, that have the nonlinearity, the speed control system of IPMSM cannot guaranteed robustness. Therefore, this paper proposes the speed control system using NTSMC and disturbance observer (DO) to improve the dynamic response and guarantee robustness of control system. Furthermore, the vector control algorithm is proposed considering the operating mode. Considering the voltage drop, Newton-Raphson method is used for searching the current reference of optimal vector control. To verify the proposed control system, the simulation is implemented using MATLAB/Simulink. Finally, the effectiveness of the proposed control system is verified compared with the conventional control system.

PID Controller Tuning using Co-Efficient Diagram method for Indirect Vector Controlled Drive

G.Durgasukumar,T.Rama Subba Redddy,B.Pakkiraiah 대한전기학회 2017 Journal of Electrical Engineering & Technology Vol.12 No.5

Medium voltage control applications due to obtain better output voltage and reduced electro-magnetic interference multi level inverter is used. In closed loop control with inverter, the PI controller does not operate satisfactorily when the operating point changes. This paper presents the performance of Co-Efficient diagram PI controller based indirect vector controlled induction motor drive fed from three-level inverter under different operating conditions (dynamic and steady state). The proposed Co-Efficient diagram PI controller based three level inverter significantly reduces the torque ripple compared to that of conventional PI controller. The performance of the indirect vector controlled induction motor drive has been simulated at different operating conditions. For three-level inverter control, a simplified space vector modulation technique is implemented, which reduces the coordinate transformations complications in the algorithms. The performance parameters, torque ripple contents and THD of induction motor drive with three-level inverter is compared under different operating conditions using CDM-PI and conventional PI controllers.

PID Controller Tuning using Co-Efficient Diagram method for Indirect Vector Controlled Drive

Durgasukumar, G.,Rama Subba Redddy, T.,Pakkiraiah, B. The Korean Institute of Electrical Engineers 2017 Journal of Electrical Engineering & Technology Vol.12 No.5

Medium voltage control applications due to obtain better output voltage and reduced electro-magnetic interference multi level inverter is used. In closed loop control with inverter, the PI controller does not operate satisfactorily when the operating point changes. This paper presents the performance of Co-Efficient diagram PI controller based indirect vector controlled induction motor drive fed from three-level inverter under different operating conditions (dynamic and steady state). The proposed Co-Efficient diagram PI controller based three level inverter significantly reduces the torque ripple compared to that of conventional PI controller. The performance of the indirect vector controlled induction motor drive has been simulated at different operating conditions. For three-level inverter control, a simplified space vector modulation technique is implemented, which reduces the coordinate transformations complications in the algorithms. The performance parameters, torque ripple contents and THD of induction motor drive with three-level inverter is compared under different operating conditions using CDM-PI and conventional PI controllers.

PREDICTIVE CONTROL OF A VEHICLE TRAJECTORY USING A COUPLED VECTOR WITH VEHICLE VELOCITY AND SIDESLIP ANGLE

이정한,유완석 한국자동차공학회 2009 International journal of automotive technology Vol.10 No.2

In this paper, a predictive algorithm for vehicle trajectory control using the vehicle velocity and sideslip angle is proposed. Since the driving state of a vehicle generates nonholonomic constraint equations, it is difficult to control the trajectory with a conventional control algorithm. Furthermore, control vectors such as vehicle velocity and sideslip angle are coupled together; hence, a separate control for each variable is not suitable. In this study, a coupled control vector that combines the velocity and sideslip angle is proposed for the predictive control of vehicle trajectory. Since the coupled control vector is derived from the status of the vehicle’s motion, it is easy to generate a feedback control vector for the predictive controller. The coupled vector cannot be directly used as input to the vehicle systems; therefore, the vehicle input vector should be calculated from the control vector using a nonlinear function. Since nonlinear functions are not inserted in the control loop, they are calculated by the controller. Therefore, this method does not require a linearization process in the control logic, which enhances the stability and accuracy of the predictive controller.

Paradigm shift to control strategy based on mosquito surveillance data

Sun Ran Cho,Chang-Won Jang,HeeIl Lee 한국응용곤충학회 2024 한국응용곤충학회 학술대회논문집 Vol.2024 No.04

In the Republic of Korea, public health centers conduct vector mosquito control in accordance with infectious disease prevention laws. However, most public health centers have traditionally conducted periodic, uniform vector control across their respective regions without considering specific information on vector occurrence. In 2021, The Korea Diseases Control and Prevention Agency(KDCA) launched a control project to shift the paradigm toward mosquito control strategy based on mosquito surveillance data. In 2024, 18 local public health centers will participate in this project, which will progressively expanding so that it can be used countrywide. Local public health centers evaluate mosquito monitoring data using data gathered from Daily Mosquito Monitoring System(DMS), which enables them to pinpoint the best times and locations for vector control. Vector control activities carried out by local public health centers are computerized utilizing Vector Control Geographic Information System(VCGIS). Using the new control strategy with mosquito surveillance, the number of mosquito occurrences, number of control activities, and amount of insecticides have decreased compared to the periodic control activities. Based on mosquito surveillance data, it is anticipated that evidence-based mosquito vector control will offer a more efficient and effective means of mosquito control.

Wide Air-gap Control for Multi-module Permanent Magnet Linear Synchronous Motors without Magnetic Levitation Windings

Bang, Deok-Je,Hwang, Seon-Hwan The Korean Institute of Power Electronics 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.5

This paper proposes a wide air-gap control method for the multi-module permanent magnet linear synchronous motor (MM-PMLSM) based on independent vector control. In particular, the MM-PMLSM consists of symmetrical multi-module and multi-phase structures, which are basically three-phase configurations without a neutral point, unlike conventional three-phase machines. In addition, there are no additional magnetic levitation windings to control the normal force of the air-gap between each stator and mover. Hence, in this paper, a dq-axis current control applying a d-q transformation and an independent vector control are proposed for the air-gap control between the two symmetric stators and mover of the MM-PMLSM. The characteristics and control performance of the MM-PMLSM are analyzed under the concept of vector control. As a result, the proposed method is easily implemented without additional windings to control the air-gap and the mover position. The effectiveness of the proposed independent vector control algorithm is verified through experimental results.

Wide Air-gap Control for Multi-module Permanent Magnet Linear Synchronous Motors without Magnetic Levitation Windings

방덕제,황선환 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.5

This paper proposes a wide air-gap control method for the multi-module permanent magnet linear synchronous motor (MM-PMLSM) based on independent vector control. In particular, the MM-PMLSM consists of symmetrical multi-module and multi-phase structures, which are basically three-phase configurations without a neutral point, unlike conventional three-phase machines. In addition, there are no additional magnetic levitation windings to control the normal force of the air-gap between each stator and mover. Hence, in this paper, a dq-axis current control applying a d-q transformation and an independent vector control are proposed for the air-gap control between the two symmetric stators and mover of the MM-PMLSM. The characteristics and control performance of the MM-PMLSM are analyzed under the concept of vector control. As a result, the proposed method is easily implemented without additional windings to control the air-gap and the mover position. The effectiveness of the proposed independent vector control algorithm is verified through experimental results.