• Proceedings of the KIEE Conference
• /
• 2003.04a
• /
• pp.34-36
• /
• 2003

철심형 PMLSM의 열적인 특성, 디텐트력 해석 및 저감, 그리고 자계의 비선형성에 대하여 살펴보며, 이에 따른 설계 특성을 고려하였다.

• Proceedings of the KIPE Conference
• /
• 2016.07a
• /
• pp.241-242
• /
• 2016

본 논문에는 매입형 영구자석 전동기(Interior Permanent Magnet Synchronous Motor, IPMSM)의 회전행렬을 이용한 고주파 신호주입 센서리스 구동 시 회전자 위치 오차 추정 성능 향상을 위한 새로운 인덕턴스 추정방법을 제안하였다. 회전행렬을 이용한 회전자 위치 오차 추정 방법은 위치 오차의 넓은 추정 범위 및 선형성을 만족하는 장점이 있으나 모델 기반 인덕턴스를 사용하기 때문에 실제 인덕턴스 값과 차이가 있을 시 추정된 위치 오차가 부정확 할 수 있다. 따라서 정확한 위치 오차를 구하기 위해 본 논문은 오프라인 상황에서 인덕턴스를 추정하는 새로운 방법을 제시하였으며 모의 실험으로 제안한 방법을 검증하였다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.19 no.2
• /
• pp.114-123
• /
• 2005

A nonlinear speed control of a PMSM using a sequential parameter auto-tuning algorithm for servo equipments is presented. The nonlinear control scheme gives an undesirable output performance under the mismatch of the system parameters and load conditions. Recently, to improve the performance, an adaptive linearization scheme, a sliding mode control and an observer-based technique have been reported. Although a good performance can be obtained, the performance is not satisfactory any more under specific conditions such as a large inertia variation, a fast speed transient or an increased sampling time. The simultaneous estimation of principal parameters giving a direct influence on speed dynamics is generally not simple. To overcome this problem, a a sequential parameter auto-tuning algorithm at start-up is proposed, where dominant parameters are estimated in a prescribed regular sequence based on the method that one parameter is estimated during each interval. The proposed scheme is implemented on a PMSM using DSP TMS320C31 and the effectiveness is verified through simulations and experiments.

• Proceedings of the KIEE Conference
• /
• 2009.04b
• /
• pp.67-69
• /
• 2009

본 논문에서는 자성재료의 비선형성을 고려한 단상 직입 영구자석형(LSPM) 동기전동기의 기동특성해석을 다룬다. 전동기의 운전상태에 따른 자성재료의 비선형특성을 고려하기 위해 정자장 유한요소법을 이용하여 d축과 q축에 대해 전류변화에 따른 인덕턴스를 추출하였다. 계산된 인덕턴스를 LSPM의 등가회로에 적용하였으며 Runge-Kutta 법을 이용하여 시간차분해석을 수행하였다. 제시된 해석방법으로 계산된 기동특성과 유한요소해석결과를 비교함으로써 비선형의 영향을 고찰 하였다.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.4 no.1
• /
• pp.1-12
• /
• 1999

A design and DSP-based implementation of robust nonlinear speed control of a permanent magnet synchronous motor(PMSM) under the unknown parameter variations and speed measurement error is presented. The model reference adaptive system(MRAS) based adaptation mechanisms for the estimation of slowly varying parameters are derived using the MIT rule. For the disturbances or quickly varying parameters, a quasilinearized and decoupled model which includes the influence of parameter variations and speed measurement error on the nonlinear speed control of a PMSM is derived. Based on this model, a boundary layer integral sliding mode controller to improve the robustness and performance of the nonlinear speed control of a PMSM is designed and compared with the conventional controller which employs Proportional plus Derivative(PD) control. To show the validity of the proposed scheme, simulations and DSP-based experimental works are carried out and compared with the conventional control scheme.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.17 no.5
• /
• pp.859-866
• /
• 2022

Active disturbance rejection control is a method in which the disturbance is removed from the controller by estimating the state variable using the Luenberger observer. The Luenberger observer is estimated by defining a nonlinear term including disturbance with constant characteristics in a steady state as a state variable. It can be shown that the speed tracking performance is improved by compensating the estimated state variable to the PI controller and the IP controller. The disturbance removal performance of the tracking control can be confirmed by observing that the estimated state error is within 1.9 [%] in the case of load fluctuation and the steady-state state tracking error converges to zero.

• The Transactions of the Korean Institute of Power Electronics
• /
• v.6 no.2
• /
• pp.149-157
• /
• 2001

A nonlinear speed control for a permanent magnet synchronous motor (PMSM) using a simple disturbance estimation technique is presented. By using a feedback linearization scheme, the nonlinear motor model can be linearized in a controllable canonical form, and the desired speed dynamics can be obtained based on the linearized model. This technique, however, gives an undesirable output performance under the mismatch of the system parameters and load conditions. To cancel disturbance by parameter variation, the controller parameters will be estimated by using a disturbance observer theory where the disturbance torque and flux linkage are estimated. since only the two reduced order observers are used for the parameter estimations, the observer designs are considerably simple and the additional load for computation of the controller is negligibly small. The proposed control scheme is implemented on a PMSM using DSP TMS320C31 and the effectiveness is verified through the comparative simulations and experiments.

• Journal of the Institute of Convergence Signal Processing
• /
• v.9 no.1
• /
• pp.89-97
• /
• 2008

Chaotic behavior in motor systems is undesired dynamics in real-time implementation since the speed is oscillated in a wide range and the torque is changed by a random manner. We present an adaptive control approach for time-varying permanent-magnet synchronous motors (PMSM) with chaotic phenomenon. We consider that its parameters are changed randomly within certain bounds. First, a nonlinear system model of a PMSM is transformed to derive a nominal linear control strategy. Then, an auxiliary control for compensating real-time control error occurred by system perturbation due to parameter change is designed by using Lyapunov stability theory. Numerical simulation is accomplished for evaluating its efficiency and reliability comparing with the traditional control method. Additionally, we test our control method in real-time motor experiment including a PSoC based drive system to demonstrate its practical applicability.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.16 no.2
• /
• pp.71-80
• /
• 2002

According to the rapid growth of high speed and precise industry, the application of synchronous motor has been increased. In the application fields, these fast dynamic response is of prime importance. In particular, since the PMLSM(Permanent Magnet Linear Synchronous Motor) has characteristics of high speed, high thrust, it has been used in high-performance servo drive. From these reasons, it is recently used for high precise position control, and machine tool. In this paper, a study of the sliding mode with VSS (Variable Structure System) design for a PMLSM is presented. For fast and precise motion control of PMLSM, the compensation of disturbance and parameter variation is necessary. Hence we eliminate the reaching phase use of VSS that is changed to switching function and vector control using the state observer. And we proposed to sliding mode control algorithm so that realize fast response without overshoot, disturbance and parameter variation.

• Proceedings of the KIEE Conference
• /
• 2015.07a
• /
• pp.837-838
• /
• 2015

본 논문에서는 양측식 영구자석 선형 동기 전동기(Permanent Magnet Linear Synchronous Motor: 이하 PMLSM)의 전기자 분산배치를 위해 전기자에 보조치 및 Offset에 의해 나타나는 단부 코깅력을 해석하였다. 또한 가장 낮은 단부 코깅력을 가지는 Offset 위치에 대하여 역기전력을 분석하였으며 이에 따른 추력 특성에 대한 고찰을 수행하였다.