The Experts below are selected from a list of 293910 Experts worldwide ranked by ideXlab platform
Yenshin Lai - One of the best experts on this subject based on the ideXlab platform.
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effective emi filter Design method for three phase inverter based upon software noise separation
The International Power Electronics Conference - ECCE ASIA, 2010Co-Authors: Poshen Chen, Yenshin LaiAbstract:This paper presents a new Design method of three-phase inverter for motor drives using software noise separation method. Therefore, no hardware noise separator is required. Moreover, the presented EMI filter Design approach provides Systematic Design procedure and therefore trial-and-error overhead is not required and thereby shortening the development time and saving the cost. The presented method determines common-mode choke and differential-mode choke based upon the required impedance of to attenuate the noise. A three-phase inverter for inductor motor drives is used as the EUT and the related conductive EMI filter is Designed and verified. It will be shown that EMI filter Designed by this Systematic Design method effectively attenuates the EMI components to meet the requirement of EN 55011.
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effective emi filter Design method for three phase inverter based upon software noise separation
IEEE Transactions on Power Electronics, 2010Co-Authors: Poshen Chen, Yenshin LaiAbstract:This paper presents an electromagnetic interference (EMI) filter Design method for a three-phase inverter applied to motor drives. The EMI filter Design is based upon the results of software noise-separation method. Therefore, no hardware noise separator is required. Moreover, the presented EMI filter Design approach provides Systematic Design procedure, and therefore, trial-and-error overhead is not required, and thereby, shortening the development time and saving the cost. The presented method determines common-mode choke and differential-mode choke based upon the required impedance to attenuate the noise. A three-phase inverter for inductor motor drives is used as the equipment under test (EUT), and the related conductive EMI filter is Designed and verified. It will be shown that EMI filter Designed by this Systematic Design method effectively attenuates the conductive EMI components to meet the requirement of EN 55011.
Zoltan K Nagy - One of the best experts on this subject based on the ideXlab platform.
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iterative learning control for the Systematic Design of supersaturation controlled batch cooling crystallisation processes
Computers & Chemical Engineering, 2013Co-Authors: Nahid Sanzida, Zoltan K NagyAbstract:Abstract The paper presents an approach to improve the product quality from batch-to-batch by exploiting the repetitive nature of batch processes to update the operating trajectories using process knowledge obtained from previous runs. The data based methodology is focused on using the linear time varying (LTV) perturbation model in an iterative learning control (ILC) framework to provide a convergent batch-to-batch improvement of the process performance indicator. The major contribution of this work is the development of a novel hierarchical ILC (HILC) scheme for Systematic Design of the supersaturation controller (SSC) of seeded batch cooling crystallizers. The HILC is used to determine the required supersaturation setpoint for the SSC and the corresponding temperature trajectory required to produce crystals with desired end-point property. The performance and robustness of these approaches are evaluated through simulation case studies. These results demonstrate the potential of the ILC approaches for controlling batch processes without rigorous process models.
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Systematic Design of supersaturation controlled crystallization processes for shaping the crystal size distribution using an analytical estimator
Chemical Engineering Science, 2012Co-Authors: Zoltan K Nagy, Erum AamirAbstract:Abstract A novel methodology is presented for the Systematic Design of setpoint operating curves and seed recipes for supersaturation controlled crystallization processes. A Design parameter for supersaturation controlled processes is introduced as a function of supersaturation, time and growth kinetics. Based on this parameter and a simplified analytical model, the supersaturation and batch time can be determined for any supersaturation controller crystallisation process, using an optimization approach to obtain a target distribution with desired shape. The approach also gives the temperature profile versus time corresponding to a particular constant supersaturation, providing a direct Design approach for practical applications. Additionally, two methods are proposed that use the seed in conjunction with the supersaturation Design for CSD control. One Designs the seed recipe as a mixture of crystals resulting from sieve analysis, whereas the second evaluates a dynamic seed addition profile, which is able to achieve complex target CSDs. The proposed methods are exemplified for the model system of potash alum in water.
Poshen Chen - One of the best experts on this subject based on the ideXlab platform.
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effective emi filter Design method for three phase inverter based upon software noise separation
The International Power Electronics Conference - ECCE ASIA, 2010Co-Authors: Poshen Chen, Yenshin LaiAbstract:This paper presents a new Design method of three-phase inverter for motor drives using software noise separation method. Therefore, no hardware noise separator is required. Moreover, the presented EMI filter Design approach provides Systematic Design procedure and therefore trial-and-error overhead is not required and thereby shortening the development time and saving the cost. The presented method determines common-mode choke and differential-mode choke based upon the required impedance of to attenuate the noise. A three-phase inverter for inductor motor drives is used as the EUT and the related conductive EMI filter is Designed and verified. It will be shown that EMI filter Designed by this Systematic Design method effectively attenuates the EMI components to meet the requirement of EN 55011.
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effective emi filter Design method for three phase inverter based upon software noise separation
IEEE Transactions on Power Electronics, 2010Co-Authors: Poshen Chen, Yenshin LaiAbstract:This paper presents an electromagnetic interference (EMI) filter Design method for a three-phase inverter applied to motor drives. The EMI filter Design is based upon the results of software noise-separation method. Therefore, no hardware noise separator is required. Moreover, the presented EMI filter Design approach provides Systematic Design procedure, and therefore, trial-and-error overhead is not required, and thereby, shortening the development time and saving the cost. The presented method determines common-mode choke and differential-mode choke based upon the required impedance to attenuate the noise. A three-phase inverter for inductor motor drives is used as the equipment under test (EUT), and the related conductive EMI filter is Designed and verified. It will be shown that EMI filter Designed by this Systematic Design method effectively attenuates the conductive EMI components to meet the requirement of EN 55011.
Frank Willems - One of the best experts on this subject based on the ideXlab platform.
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Systematic Design of Multivariable Fuel Injection Controllers for Advanced Diesel Combustion
IEEE Transactions on Control Systems Technology, 2019Co-Authors: M. C. F. Donkers, Bram De Jager, Frank WillemsAbstract:With multiple fuel injections per combustion cycle, the advanced diesel combustion process depends on all injection pulses in a coupled way. This makes the control of the multipulse fuel injection profile challenging, and the currently employed decoupled Design methods might fail to guarantee closed-loop stability. Without explicit consideration of disturbances, it is also difficult for current Design methods to guarantee the robustness of a fuel injection controller. In this paper, we present a general framework that describes the cycle-to-cycle fuel injection control problem. A control-oriented model is introduced and locally validated with experimental data. It considers the disturbances and captures the coupled relation between the multipulse fuel injection profile and the combustion process. Based on the general framework and the control-oriented combustion model, we propose a Systematic Design approach to synthesize a multivariable fuel injection controller. With guaranteed robust stability and fast settling time (0.5 seconds/5 combustion cycles in experiments), the controller's reference tracking performance and disturbance rejection capability are demonstrated experimentally on a single-cylinder engine test bench.
Sigurd Skogestad - One of the best experts on this subject based on the ideXlab platform.
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Systematic Design of active constraint switching using classical advanced control structures
Industrial & Engineering Chemistry Research, 2020Co-Authors: Adriana Reyeslua, Sigurd SkogestadAbstract:An important task of the supervisory control layer is to maintain optimal operation. To achieve this, we need to change control objectives when constraints become active (or inactive) as a result of disturbances. In most process plants, the supervisory layer uses classical PID-based advanced control structures, but there is no Systematic way of Designing such structures. Here, we propose a Systematic procedure to Design the supervisory control layer using single-loop classical advanced control structures, such that the process achieves steady-state optimal operation when the active constraints change. The active constraints can be on the manipulated variable (MV, input) or on the controlled variable (CV, output). In this paper, we consider all three possible cases: CV–CV switching, which involves selectors; CV–MV switching, which does not need any special structure if we pair according to the input saturation pairing rule; and MV–MV switching, which uses split range control or some similar structure. We illustrate our methodology with two case studies.
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Systematic Design of active constraint switching using classical advanced control structures
Industrial & Engineering Chemistry Research, 2020Co-Authors: Adriana Reyeslua, Sigurd SkogestadAbstract:An important task of the supervisory control layer is to maintain optimal operation. To achieve this, we need to change control objectives when constraints become active (or inactive) as a result o...
