SDRE-Based Near Optimal Control System Design for PM Synchronous Motor

Duc, Ton; Choi, Han Ho; Jung, Jin‐Woo

doi:10.1109/tie.2011.2174540

Cited by 75 publications

(49 citation statements)

References 28 publications

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“…Note that the value of N is chosen via extensive simulation and experimental studies as done in the state-dependent Riccati equation methods in [32] and [33]. By substituting the control law (18) and the compensating terms (5) into (4), the α-axis and β-axis stator voltages can be expressed as…”

Section: A Nonlinear Optimal Controller For Direct Torque Controlmentioning

confidence: 99%

Nonlinear Optimal DTC Design and Stability Analysis for Interior Permanent Magnet Synchronous Motor Drives

Duc

Choi

Jung

2015

IEEE/ASME Trans. Mechatron.

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Abstract-This paper presents a nonlinear optimal direct torque control (DTC) scheme of interior permanent magnet synchronous motors (IPMSMs) based on an offline approximation approach for electric vehicle (EV) applications. First, the DTC problem is reformulated in the stationary reference frame in order to avoid estimating the stator flux angle, which the previous DTC schemes in the rotating stator reference frame require. Thus, the proposed DTC method eliminates the Park's transformation and consequently it reduces the computational efforts. Particularly, since the estimated stator flux angle is not accurate in low speed range, the proposed method that does not need this information can significantly improve the control performance. Moreover, a nonlinear optimal DTC algorithm is proposed to deal with the nonlinearity of the IPMSM drive system. In this paper, a simple offline θ-D approximation technique is utilized to appropriately determine the controller gains. Via an IPMSM test-bed with a TI TMS320F28335 DSP, the experimental results demonstrate the feasibility of the proposed DTC method by accomplishing better control performances (e.g., more stable in low speed region, much smaller speed and torque ripples, and faster dynamic responses) compared to the conventional proportionalintegral (PI) DTC scheme under various scenarios with the existence of parameter uncertainties. Index Terms-Direct torque control (DTC), electric vehicle (EV), interior permanent magnet synchronous motor (IPMSM), nonlinear optimal control. I. INTRODUCTIONElectric vehicles (EVs) were invented about two centuries ago. However, the utilization of EVs was stopped in the following century because of both economic and technical aspects such as high cost, capacity shortage of battery, and speed limitation. Recently, the study on the EVs has warmed up as the environmental problems associated with internal combustion engine (ICE) based vehicles become more and more serious. Nowadays, with a fast evolution of battery technology, the eco-friendly EVs become a promising Manuscript received March 11, 2015; accepted April 17, 2015. This work was supported by the National Research Foundation of Korea (NRF) under Grant 2012R1A2A2A01045312 funded by the Korea government (MSIP, Ministry of Science, ICT & Future Planning).The authors are with the Division of Electronics and Electrical Engineering, Dongguk University, Seoul 100-715, Korea (e-mail: jinwjung@dongguk.edu).alternative to replace the ICE based vehicles [1]- [4].In EVs, the propulsion system uses an electric motor instead of an ICE in conventional vehicles. There are two main types of electric motors widely utilized in the EVs: induction motor (IM) [5]- [7] and interior permanent magnet synchronous motor (IPMSM) [8]- [10]. In traction applications, the IPMSM is preferable to the IM [11], [12] due to its high efficiency and reliability, high power factor and power density, and high torque to inertia ratio. In addition to these advantages, the invention of highperformance magnets makes the IPMS...

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Section: A Nonlinear Optimal Controller For Direct Torque Controlmentioning

confidence: 99%

Nonlinear Optimal DTC Design and Stability Analysis for Interior Permanent Magnet Synchronous Motor Drives

Duc

Choi

Jung

2015

IEEE/ASME Trans. Mechatron.

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“…이전 결과 [5][6][7]를 참조해서 임시변수 를 도입하여        로 표현하자. SDRE (13)의 해를 Taylor급 수 형태로 임시변수 를 활용하여 다음을 얻을 수 있다.…”

Section: 정격전력 이하에서는 블레이드의 피치각unclassified

SDRE Based Near Optimal Controller Design of Permanent Magnet Synchronous Generator for Variable-Speed Wind Turbine System

Park¹,

Choi²

2015

Journal of Institute of Control, Robotics and Systems

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Abstract:In this paper, we propose a near optimal controller design method for permanent magnet synchronous generators (PMSGs) of MW-class direct-driven wind turbine systems based on SDRE (State Dependent Riccati Equation) approach. Using the solution matrix of an SDRE, we parameterize the optimal controller gain. We present a simple algorithm to compute the near optimal controller gain. The proposed optimal controller can enable PMSGs to precisely track the reference speed determined by the MPPT algorithm. Finally, numerical simulation results are given to verify the effectiveness of the proposed optimal controller. Keywords

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“…PMSM has found extensive applications in high speed and precision servo systems (see e.g., [13], [14], [15]), due to the advantages of light weight, high efficiency and compact structure. In this paper, we deal with the surface-mounted PMSMs, with the dq model given by…”

Section: Application In Pmsm Position Servo Systemmentioning

confidence: 99%

A mode switching control design for fast position servo systems with permanent magnet synchronous motor

Cheng

2013

2013 10th IEEE International Conference on Control and Automation (ICCA)

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A mode switching control scheme is proposed to achieve fast set-point tracking in motor servo systems. The control scheme incorporates a composite nonlinear feedback (CNF) control law into the framework of proximate timeoptimal servomechanisms (PTOS). The CNF control law consists of a linear feedback part for achieving fast response and a nonlinear feedback part for suppressing the overshoot, so as to improve the transient performance in short span positioning, while the PTOS control law is responsible for fast acceleration and deceleration when the tracking error is large. A parameterized MSC controller is designed and the closed-loop stability is analyzed theoretically. The control scheme was then applied to the position-velocity control loop in a permanent magnet synchronous motor servo system. Experimental test has been conducted using the TMS320F2812 DSP. The results verify that the servo system is capable of fast and smooth positioning on a wide range of target locations.

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SDRE-Based Near Optimal Control System Design for PM Synchronous Motor

Cited by 75 publications

References 28 publications

Nonlinear Optimal DTC Design and Stability Analysis for Interior Permanent Magnet Synchronous Motor Drives

Nonlinear Optimal DTC Design and Stability Analysis for Interior Permanent Magnet Synchronous Motor Drives

SDRE Based Near Optimal Controller Design of Permanent Magnet Synchronous Generator for Variable-Speed Wind Turbine System

A mode switching control design for fast position servo systems with permanent magnet synchronous motor

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