scholarly journals A Novel Identification Approach for Classic Controller Design Applied on Flyback Converter

2021 ◽  
Vol 54 (1) ◽  
pp. 105-113
Author(s):  
Abbas Ghayebloo ◽  
Mohsen Ghaleghovand ◽  
Abolfazl Jalilvand
Keyword(s):  
Controller Design ◽  
Design Method ◽  
Current Mode ◽  
Identification Problem ◽  
Design Approach ◽  
Flyback Converter ◽  
Linearization Methods ◽  
Current Controller ◽  
Identification Approach ◽  
And Performance

In this paper, a new controller design approach for DC-DC flyback converter has been proposed and compared with classic controller design approach. The proposed controller design method has been innovated from the identification LS method that previously applied on parameter identification. The proposed method exchanges the controller design problem to the identification problem. The proposed approach has two considerable superiority compared with common methods. It can design a controller with the desired structure and desired performance. Regard to these advantages, it can be notated that the proposed approach is well suited for SMPS application where benefits from analog controllers for the decreased total cost. For controller design purposes, the large and small-signal models of the flyback converter, using well-known state-space averaging and linearization methods have been extracted and controllers with classic and proposed approaches have been designed. Also, it proved that the conventional peak current controller used in commercial current-mode analog controllers is equivalent to a proportional average controller. One practical flyback converter has designed and implemented in continuous mode with two controllers and some experimental and simulation results have been provided for verification of the proposed method. The simulation and experimental results show that the proposed design approach can provide a controller with the desired structure and performance.

Digital Controller Design Research Based on Series Compensation

2014 ◽  
Vol 1037 ◽  
pp. 294-298
Author(s):  
Yu Chuan Wu ◽  
Zheng Yan Gao Xu ◽  
Shuang Bao Ma
Keyword(s):  
Transfer Function ◽  
Design Research ◽  
Controller Design ◽  
Design Method ◽  
Design Approach ◽  
Digital Controller ◽  
Series Compensation ◽  
Compensation Design

By presetting correcting device transfer function D(z), this paper puts forward series compensation design approach of minimum beat system. Compared with tradition design method, this way is much simpler and easier.

IPMSM Speed and Current Controller Design for Electric Vehicles Based on Explicit MPC

2019 ◽  
Vol 23 (6) ◽  
pp. 1019-1026
Author(s):  
Fang Liu ◽  
Feng Gao ◽  
Ling Liu ◽  
Denis N. Sidorov ◽  
◽  
...  
Keyword(s):  
Electric Vehicles ◽  
Controller Design ◽  
Design Method ◽  
Nonlinear Behavior ◽  
Linearization Method ◽  
Computational Effort ◽  
Control Input ◽  
Permanent Magnet Synchronous Motors ◽  
Current Controller ◽  
Cascade Structure

The difficulties in implementing the model predictive control (MPC) in interior permanent-magnet synchronous motors (IPMSMs) consist of the nonlinear behavior of IPMSMs and the computational effort required by MPC. This paper presents an IPMSM controller design method for electric vehicles based on explicit MPC (EMPC), which uses a different linearization method. The proposed controller combines the speed and current controllers and replaces the traditional cascade structure. First, the nonlinear terms in the system model are added into the control input as voltage compensation to obtain a simple linear model. Next, the proposed controller based on MPC is designed, which considers the effects of load torque and uses an increment model. Furthermore, the controller applies both current and voltage constraints. The EMPC method based on a binary search is used to accelerate the solution of the optimization problem. Finally, the simulation results show the validity and superiority of the proposed method.

Design of Experiments for the Controller of Rotor Systems With a Magnetic Bearing

1997 ◽  
Vol 119 (2) ◽  
pp. 200-207 ◽  
Author(s):  
G. J. Sheu ◽  
S. M. Yang ◽  
C. D. Yang
Keyword(s):  
Controller Design ◽  
Design Method ◽  
Magnetic Bearing ◽  
Control Technique ◽  
Design Parameters ◽  
Control Engineering ◽  
Rotor Systems ◽  
Experimental Design Method ◽  
Loss Index ◽  
And Performance

A new design methodology for the vibration control of rotor systems with a magnetic bearing is developed in this paper. The methodology combines the experimental design method in quality control engineering and the conventional PD control technique such that their advantages in implementation feasibility and performance-robustness can be integrated together. A quality loss index defined by the summation of the infinity norm of unbalanced vibration is used to characterize the system dynamics. By using the location of the magnetic bearing and PD feedback gains as design parameters, the controller can be determined by a small number of matrix experiments to achieve the best system performance. In addition, it is robust to the vibration modes within a desired speed range. A rotor system consisting of 4 rigid disks, 3 isotropic bearings, and 1 magnetic bearing is applied to illustrate the feasibility and effectiveness of the experiment-aided controller design.

scholarly journals Fast Flux and Torque Control of a Double Inverter-Fed Wound Machine Considering All Coupling Interferences

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1845
Author(s):  
Yongsu Han
Keyword(s):  
Control Method ◽  
Controller Design ◽  
Design Method ◽  
Current Control ◽  
Torque Control ◽  
Flux Control ◽  
Efficient Operation ◽  
Decoupling Method ◽  
Current Controller ◽  
Fast Flux

For efficient operation of the squirrel cage induction motor, the flux must be properly adjusted according to the torque. However, in such variable flux operation, the performance of torque control is limited by the flux control because it is not possible to measure and control the rotor current that affects the flux. On the contrary, in a double inverter-fed wound machine (DIFWM), the inverter is connected to the rotor side, as well as the stator side, and the rotor current can be controlled. This controllability of the rotor currents improves the operation performance of a DIFWM. This article presents the decoupling current control method of a DIFWM for fast flux and torque control. Since the rotor flux is directly calculated by the stator and rotor currents, the bandwidth of the flux control can be improved to the bandwidth of the current controller, which means that the torque control also has the same bandwidth. In this article, a detailed current controller design method with a DIFWM feed-forwarding decoupling method to eliminate all coupling interferences is proposed. The simulation and experimental results regarding the DIFWM are presented to verify the torque and flux control performance of the proposed control method.

Vibration Control of Rotor Systems With Noncollocated Sensor/Actuator by Experimental Design

1997 ◽  
Vol 119 (3) ◽  
pp. 420-427 ◽  
Author(s):  
S. M. Yang ◽  
G. J. Sheu ◽  
C. D. Yang
Keyword(s):  
Experimental Design ◽  
Vibration Suppression ◽  
Controller Design ◽  
Design Method ◽  
Control Technique ◽  
Design Parameters ◽  
Rotor Systems ◽  
Sensor Actuator ◽  
Operation Speed ◽  
And Performance

This paper presents a controller design methodology for vibration suppression of rotor systems in noncollocated sensor/actuator configuration. The methodology combines the experimental design method of quality engineering and the active damping control technique such that their advantages in implementation feasibility and performance-robustness can be integrated together. By using the locations of sensor/actuator and the feedback gains as design parameters, the controller design is shown to achieve a near optimal performance within the two-sigma confidence among all possible parameter combinations. Compared with LQ-based designs, the controller order is smaller and it is applicable to systems in an operation speed range. In addition, neither preselected sensor/actuator location(s) nor state measurement/ estimation is needed.

scholarly journals A Modified Step-Up DC-DC Flyback Converter with Active Snubber for Improved Efficiency

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2066 ◽  
Author(s):  
Cristian Pesce ◽  
Javier Riedemann ◽  
Ruben Pena ◽  
Werner Jara ◽  
Camilo Maury ◽  
...  
Keyword(s):  
Output Voltage ◽  
High Efficiency ◽  
Controller Design ◽  
Current Mode ◽  
Input Voltage ◽  
Input Power ◽  
Good Efficiency ◽  
Main Research ◽  
Flyback Converter ◽  
Wide Range

The research on DC-DC power converters has been a matter of interest for years since this type of converter can be used in a wide range of applications. The main research is focused on increasing the converter voltage gain while obtaining a good efficiency and reliability. Among the different DC-DC converters, the flyback topology is well-known and widely used. In this paper, a novel high efficiency modified step-up DC-DC flyback converter is presented. The converter is based on a N-stages flyback converter with parallel connected inputs and series-connected outputs. The use of a single main diode and output capacitor reduces the number of passive elements and allows for a more economical implementation compared with interleaved flyback topologies. High efficiency is obtained by including an active snubber circuit, which returns the energy stored in the leakage inductance of the flyback transformers back to the input power supply. A 4.7 kW laboratory prototype is implemented considering four flyback stages with an input voltage of 96 V and an output voltage of 590 V, obtaining an efficiency of 95%. The converter operates in discontinuous current mode then facilitating the output voltage controller design. Experimental results are presented and discussed.

scholarly journals Simulated Annealing Optimization of PMBLDC Motor Speed and Current Controllers

2020 ◽  
Vol 15 ◽  
Keyword(s):  
Simulated Annealing ◽  
Direct Current ◽  
High Speed ◽  
High Efficiency ◽  
Controller Design ◽  
Design Method ◽  
Industrial Applications ◽  
Motor Speed ◽  
Proportional Integral ◽  
Current Controller

Brushless Direct-Current (BLDC) motors have several advantages including high efficiency and high speed ranges and accordingly are commonly used in a broad range of industrial applications. The optimization of the proportional-integral (PI) and proportional-integral-derivative (PID) controller parameters are highly explored and a number of tuning techniques have been proposed. This work demonstrates a permanent magnet brushless Direct-Current (PMBLDC) motor controller design method by employing a simulated annealing optimization (SAO) algorithm to optimize the current controller and speed controller parameters to concurrently minimize over-shoot, rise-time, and settling-time. We compared the proposed approach with the Particle Swarm Optimization and the Ziegler-Nichols approaches and showed that the proposed approach outperforms both of the other two approaches.

scholarly journals Experiment-Aided Controller Design of Rotor Systems With a Magnetic Bearing

1995 ◽  
Author(s):  
G. J. Sheu ◽  
C. D. Yang ◽  
S. M. Yang
Keyword(s):  
Controller Design ◽  
Design Method ◽  
Magnetic Bearing ◽  
Control Technique ◽  
Design Parameters ◽  
Control Engineering ◽  
Rotor Systems ◽  
Loss Index ◽  
And Performance ◽  
Aided Design

A new design methodology for the vibration control of rotor systems with a magnetic bearing is developed in this paper. The methodology combines the experimental design method in quality control engineering and the conventional PD control technique such that their advantages in implementation feasibility and performance-robustness can be integrated together. A quality loss index defined by the summation of the infinity norm of unbalanced vibration is used to characterize the system dynamics. By using the location of the magnetic bearing and PD feedback gains as design parameters, the controller of experiment-aided design achieves the best system performance. In addition, it is robust to operating speed variations. A rotor system consisting of 4 rigid disks, 3 isotropic bearings, and 1 magnetic bearing is applied to illustrate the feasibility and effectiveness of the experiment-aided controller design.

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