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.

A New Iterative Identification and Control Method of Closed-Loop Power System Based on Ambient Signals

2015 ◽  
Vol 798 ◽  
pp. 261-265
Author(s):  
Miao Yu ◽  
Chao Lu
Keyword(s):  
Power System ◽  
Closed Loop ◽  
Control Method ◽  
Controller Design ◽  
Design Method ◽  
Stability Margin ◽  
System Stability ◽  
Iterative Identification ◽  
Effective Performance ◽  
And Control

Identification and control are important problems of power system based on ambient signals. In order to avoid the model error influence of the controller design, a new iterative identification and control method is proposed in this paper. This method can solve model set and controller design of closed-loop power system. First, an uncertain model of power system is established. Then, according to the stability margin of power system, stability theorem is put forward. And then controller design method and the whole algorithm procedure are given. Simulation results show the effective performance of the proposed method based on the four-machine-two-region system.

scholarly journals Sliding Mode Based Control of Dual Boost Inverter for Grid Connection

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4241 ◽  
Author(s):  
Diana Lopez-Caiza ◽  
Freddy Flores-Bahamonde ◽  
Samir Kouro ◽  
Victor Santana ◽  
Nicolás Müller ◽  
...  
Keyword(s):  
Control Method ◽  
Controller Design ◽  
Sliding Mode ◽  
Current Control ◽  
Voltage Step ◽  
Control Loops ◽  
Voltage Ratio ◽  
Grid Connection ◽  
Resonant Controller ◽  
Laboratory Prototype

Single-stage voltage step-up inverters, such as the Dual Boost Inverter (DBI), have a large operating range imposed by the high step-up voltage ratio, which together with the converter of non-linearities, makes them a challenge to control. This is particularly the case for grid-connected applications, where several cascaded and independent control loops are necessary for each converter of the DBI. This paper presents a global current control method based on a combination of a linear proportional resonant controller and a non-linear sliding mode controller that simplifies the controller design and implementation. The proposed control method is validated using a grid-connected laboratory prototype. Experimental results show the correct performance of the controller and compliance with power quality standards.

scholarly journals Evaluation of Efficient Operation for Electromechanical Brake Using Maximum Torque per Ampere Control

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1869 ◽  
Author(s):  
Seung-Koo Baek ◽  
Hyuck-Keun Oh ◽  
Joon-Hyuk Park ◽  
Yu-Jeong Shin ◽  
Seog-Won Kim
Keyword(s):  
Permanent Magnet Synchronous Motor ◽  
Current Control ◽  
Experimental Results ◽  
Input Current ◽  
Maximum Torque ◽  
Element Analysis ◽  
Efficient Operation ◽  
Current Controller ◽  
Maximum Torque Per Ampere ◽  
Electromechanical Brake

This paper deals with efficient operation method for the electromechanical brake (EMB). A three-phase interior permanent magnet synchronous motor (IPMSM) is applied to the EMB operation. A current controller, speed controller, and position controller based on proportional-integral (PI) control are used to drive the IPMSM. Maximum torque per ampere (MTPA) control is applied to the current controller to perform efficient control. For MTPA control, the angle β is calculated from total input current, and the synchronous frame d–q axis current reference is determined by the angle β. The IPMSM is designed and analyzed with finite element analysis (FEA) software and current control is simulated by Matlab/Simulink using a motor model designed by FEA software. The simulation results were verified to compare with experimental results that are input current and clamping force of caliper. In addition, the experimental results showed that the energy consumption is reduced by MTPA.

Learning control of flexible manipulator with unknown dynamics

2017 ◽  
Vol 37 (3) ◽  
pp. 304-313 ◽  
Author(s):  
Zhiguang Chen ◽  
Chenguang Yang ◽  
Xin Liu ◽  
Min Wang
Keyword(s):  
Control Method ◽  
Controller Design ◽  
Design Method ◽  
Weight Ratio ◽  
Response Speed ◽  
Dynamic Surface Control ◽  
Flexible Manipulator ◽  
Dynamic Surface ◽  
Content Type ◽  
Surface Control

Purpose The purpose of this paper is to study the controller design of flexible manipulator. Flexible manipulator system is a nonlinear, strong coupling, time-varying system, which is introduced elastodynamics in the study and complicated to control. However, due to the flexible manipulator, system has a significant advantage in response speed, control accuracy and load weight ratio to attract a lot of researchers. Design/methodology/approach Since the order of flexible manipulator system is high, designing controller process will be complex, and have a large amount of calculation, but this paper will use the dynamic surface control method to solve this problem. Findings Dynamic surface control method as a controller design method which can effectively solve the problem with the system contains nonlinear and reduced design complexity. Originality/value The authors assume that the dynamic parameters of flexible manipulator system are unknown, and use Radial Basis Function neural network to approach the unknown system, combined with the dynamic surface control method to design the controller.

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.

INTEGRATED PID CONTROLLER DESIGN FOR AN UNMANNED AERIAL VEHICLE WITH STATIC STABILITY

2013 ◽  
Vol 54 (3) ◽  
pp. 200-215 ◽  
Author(s):  
R. LI ◽  
Y. J. SHI ◽  
H. L. XU
Keyword(s):  
Fuzzy Control ◽  
Unmanned Aerial Vehicle ◽  
Pid Controller ◽  
Control Method ◽  
Controller Design ◽  
Design Method ◽  
Design Procedure ◽  
Static Stability ◽  
Aerial Vehicle ◽  
Rolling Mode

AbstractThis paper presents an integrated guidance and control (IGC) design method for an unmanned aerial vehicle with static stability which is described by a nonlinear six-degree-of-freedom (6-DOF) model. The model is linearized by using small disturbance linearization. The dynamic characteristics of pitching mode, rolling mode and Dutch rolling mode are obtained by analysing the linearized model. Furthermore, an IGC design procedure is also proposed in conjunction with a proportional–integral–derivative (PID) control method and fuzzy control method. A PID controller is applied in the control loop of the elevator and aileron, and the attitude angle and attitude angular velocity are used as compensation feedback, giving a simple and low-order control law. A fuzzy control method is applied to perform the cross-coupling control of rolling and yawing. Finally, the 6-DOF simulation shows the effectiveness of the developed method.

A Hysteretic Current Controller for Active Power Filter (APF) with Constant Frequency

2012 ◽  
Vol 460 ◽  
pp. 308-312
Author(s):  
Qing Shou Song
Keyword(s):  
Control Method ◽  
Current Control ◽  
Switching Frequency ◽  
Matlab Simulation ◽  
Constant Frequency ◽  
Hysteresis Current Control ◽  
Power Filter ◽  
Switching Losses ◽  
Current Controller ◽  
Frequency State

In accordance with the advantage of conventional hysteresis current control method, this paper advances a novel control method for APF. In conventional hysteresis current control, the hysteresis band (HB) is fixed and actual compensating current is limited in a fixed HB. Firstly, the connection between HB and switching frequency must be found correctly. Then, the variable hysteresis band current controller is designed according to the connection. Finally, the Matlab simulation results show that the switching frequency of VSI is held nearly constant and the proposed controller can track reference current well[1]. The problems of increasing switching losses and audible noise which happened in high-frequency state can be resolved in conventional hysteresis current control.

A Nonlinear Controller Design Method for Fuel-Injected Automotive Engines

1988 ◽  
Vol 110 (3) ◽  
pp. 313-320 ◽  
Author(s):  
D. Cho ◽  
J. K. Hedrick
Keyword(s):  
Fuel Injection ◽  
Control Method ◽  
Controller Design ◽  
Sliding Mode ◽  
Design Method ◽  
Model Errors ◽  
Nonlinear Controller ◽  
Engine Model ◽  
Automotive Engines ◽  
On Line

A nonlinear, “sliding mode” fuel-injection controller is designed based on a physically motivated, mathematical engine model. The designed controller can achieve a commanded air-to-fuel ratio with excellent transient properties, which offers the potential for improving fuel economy, torque transients, and emission levels. The controller is robust to model errors as well as to rapidly changing maneuvers of throttle and spark advance. The sliding mode control method offers a great potential for future engine control problems, since: it results in a relatively simple control structure that requires little on-line computing and no table lookups; it is robust to model errors and disturbances; and it can be easily adapted to a family of engines.

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