scholarly journals Dynamics of Electromechanical Systems Containing Long Elastic Couplings and Safety of Their Operation

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7882
Author(s):  
Andrzej Popenda ◽  
Andrzej Szafraniec ◽  
Andriy Chaban
Keyword(s):  
Rapid Change ◽  
Electromechanical Systems ◽  
Loop Control ◽  
Control Structures ◽  
Speed Controller ◽  
Transmission Shaft ◽  
Automatic Adaptation ◽  
Drive Systems ◽  
Elastic Couplings ◽  
Rotational Speed Control

The electromechanical systems under analysis include electric drives, working machines that perform specific tasks in the technological process, and working mechanisms that transmit mechanical power between the electric drive and the working machine. The vast majority of electric motors included in drive systems require rotational speed control. This task is most often performed with the use of closed-loop control structures based on speed controllers. A step or overly rapid change in the speed reference causes a temporary lock of the speed controller due to the applied limitations at its output. Particularly, unfavorable effects of such a lock can be observed in drive systems in which there is a long elastic coupling (transmission shaft) between the electric motor and the working machine. As a consequence, shaft torsion and accompanying twisting moments of considerable amplitudes appear. This article proposes an uncomplicated active torque limiter structure, which enables the uninterrupted operation of the speed controller thanks to the automatic adaptation of the rate of the speed reference change to any moment of inertia of the rotor and attached rotating masses. The results of the investigations confirm the effectiveness of the proposed structure.

scholarly journals Auger-type granular fertylizer distributor: matemathical model and dynamic simulation

2012 ◽  
Vol 32 (1) ◽  
pp. 151-163 ◽  
Author(s):  
Angel P. Garcia ◽  
Nelson L. Cappelli ◽  
Claudio K. Umezu
Keyword(s):  
Electric Drive ◽  
Angular Speed ◽  
Open Loop ◽  
Loop Control ◽  
Speed Controller ◽  
Variable Rate Application ◽  
Input Model ◽  
Drive Systems ◽  
Operation Cycle ◽  
The Mathematical Model

The objective of this study was to model mathematically and to simulate the dynamic behavior of an auger-type fertilizer applicator (AFA) in order to use the variable-rate application (VRA) and reduce the coefficient of variation (CV) of the application, proposing an angular speed controller θ' for the motor drive shaft. The input model was θ' and the response was the fertilizer mass flow, due to the construction, density of fertilizer, fill factor and the end position of the auger. The model was used to simulate a control system in open loop, with an electric drive for AFA using an armature voltage (V A) controller. By introducing a sinusoidal excitation signal in V A with amplitude and delay phase optimized and varying θ' during an operation cycle, it is obtained a reduction of 29.8% in the CV (constant V A) to 11.4%. The development of the mathematical model was a first step towards the introduction of electric drive systems and closed loop control for the implementation of AFA with low CV in VRA.

scholarly journals Design and Implementation of Position Sensorless Field-Excited Flux-Switching Motor Drive Systems

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3672
Author(s):  
Tian-Hua Liu ◽  
Muhammad Syahril Mubarok ◽  
Yu-Hao Xu
Keyword(s):  
Digital Signal Processor ◽  
Position Estimation ◽  
Drive System ◽  
Dynamic Responses ◽  
Motor Drive ◽  
Rotor Position ◽  
Speed Controller ◽  
Drive Systems ◽  
Predictive Controllers ◽  
Flux Switching Motor

Field-excited flux-switching motor drive systems have become more and more popular due to their robustness and lack of need for a permanent magnet. Three different types of predictive controllers, including a single-step predictive speed controller, a multi-step predictive speed controller, and a predictive current controller are proposed for sensorless flux-switching motor drive systems in this paper. By using a 1 kHz high-frequency sinusoidal voltage injected into the field winding and by measuring the a-b-c armature currents in the stator, an estimated rotor position that is near ± 2 electrical degrees is developed. To improve the dynamic responses of the field-excited flux-switching motor drive system, predictive controllers are employed. Experimental results demonstrate the proposed predictive controllers have better performance than PI controllers, including transient, load disturbance, and tracking responses. In addition, the adjustable speed range of the proposed drive system is from 4 r/min to 1500 r/min. A digital signal processor, TMS-320F-2808, is used as a control center to carry out the rotor position estimation and the predictive control algorithms. Measured results can validate the theoretical analysis to illustrate the practicability and correctness of the proposed method.

scholarly journals Auto-Tuning Process of State Feedback Speed Controller Applied for Two-Mass System

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3067
Author(s):  
Rafal Szczepanski ◽  
Marcin Kaminski ◽  
Tomasz Tarczewski
Keyword(s):  
State Feedback ◽  
Mass System ◽  
Tuning Method ◽  
Optimal Coefficients ◽  
Speed Controller ◽  
Bee Colony ◽  
Tuning Process ◽  
Drive Systems ◽  
The Stability ◽  
Variable Moment

The state feedback controller is increasingly applied in electrical drive systems due to robustness and good disturbance compensation, however its main drawback is related to complex and time consuming tuning process. It is particularly troublesome for designer, if the plant is compound, nonlinear elements are taken into account, measurement noise is considered, etc. In this paper the application of nature-inspired optimization algorithm to automatic tuning of state feedback speed controller (SFC) for two-mass system (TMS) is proposed. In order to obtain optimal coefficients of SFC, the Artificial Bee Colony algorithm (ABC) is used. The objective function is described and discussed in details. Comparison with analytical tuning method of SFC is also included. Additionally, the stability analysis for the control system, optimized using the ABC algorithm, is presented. Synthesis procedure of the controller is utilized in Matlab/Simulink from MathWorks. Next, obtained coefficients of the controller are examined on the laboratory stand, also with variable moment of inertia values, to indicate robustness of the controller with optimal coefficients.

An Integrated Dual Voltage Loop Control for Capacitance Reduction in CHB-Based Regenerative Motor Drive Systems

2019 ◽  
Vol 66 (5) ◽  
pp. 3369-3379 ◽  
Author(s):  
Zezhou Yang ◽  
Jianjun Sun ◽  
Yi Tang ◽  
Meng Huang ◽  
Xiaoming Zha
Keyword(s):  
Motor Drive ◽  
Loop Control ◽  
Drive Systems

scholarly journals Structures of vector control of n-phase motor drives based on generalized Clarke transformation

2016 ◽  
Vol 64 (4) ◽  
pp. 865-872
Author(s):  
M. Janaszek
Keyword(s):  
Vector Control ◽  
Control Strategies ◽  
Open Loop ◽  
Current Control ◽  
Loop Current ◽  
Control Structures ◽  
Clarke Transformation ◽  
Drive Systems ◽  
Novel Concept ◽  
Multi Phase

Abstract The paper presents vector control structures for n-phase AC motors derived from generalized Clarke transformation. In contrast to known works, where authors operate on generalized formulas of the Clarke transformation, in this work, only a number of actually used phases, of mostly industrial purposes, are considered (n = 5, 6, 2×3). This allows to perform control calculations in stationary orthogonal coordinates aβ or rotating dq. There are implementations of different control strategies: ROC (rotor-oriented control) or FOC (field-oriented control). Next, the paper presents the novel concept of a voltage modulator designed for multi-phase drive systems. Operation of the modulator is based on the extended Clarke transformation for multiphase systems. A mathematical model of the multiphase voltage modulator, operating in open-loop and closed-loop current control has been presented. Some selected oscillograms of voltage and current waveform, which illustrate properties of proposed control structures have been presented.

Simulating Analysis and Choosing Control Method on the Speed Control of Egg Quality’s Detection

2011 ◽  
Vol 268-270 ◽  
pp. 1179-1183 ◽  
Author(s):  
Li Rong Xiong
Keyword(s):  
Induction Motor ◽  
Computer Aided Design ◽  
Control Method ◽  
Digital Simulation ◽  
Oscillation Amplitude ◽  
Control Process ◽  
Speed Control ◽  
Motor Speed ◽  
Speed Controller ◽  
Drive Systems

This fuzzy speed controller is designed and applied in induction motor drive systems. MATLAB software fuzzy logic toolbox is used to the single closed-loop induction motor speed control system for computer-aided design, and SIMULINK dynamic digital simulation is used to achieve optimal control parameters. Tests show that the fuzzy control process is overshoot, response time is short, the system oscillation amplitude is low, it is the optimum control strategy.

scholarly journals DRNN Robust DTC for Induction Motor Drive Systems Using FSTPI

2021 ◽  
Vol 54 (4) ◽  
pp. 539-547
Author(s):  
Lucky Dube ◽  
Ehab H.E. Bayoumi
Keyword(s):  
High Speed ◽  
Direct Torque Control ◽  
Torque Control ◽  
Speed Controller ◽  
Three Phase ◽  
Motor Parameter ◽  
Self Tuning ◽  
Drive Systems ◽  
Stator Resistance ◽  
Three Phase Inverter

In this paper, a self-tuning PI speed controller based on diagonal recurrent neural network is (DRNN) investigated and simulated to increase the robustness of the direct torque control (DTC) scheme for three-phase low-power IM drive system using a Four Switch Three-Phase Inverter (FSTPI). The drive is subjected to different system inputs and disturbances, step changes in speed under different load conditions, abrupt loading at high speed and speed reversal. Furthermore, the robustness of the controller is evaluated by varying motor parameter, stator resistance and moment of inertia. A comparison of classical and self-tuning PI speed controllers was presented to determine the effectiveness of the proposed controller. It is concluded based on simulation results using Matlab/Simulink. that the self-tuning PI speed controller provides the best performance by reacting rapidly and adaptively.

Dynamics of a Stepping Motor Driven Conventional Machine Slide

1988 ◽  
Author(s):  
E. I. Umez-Eronini
Keyword(s):  
Low Cost ◽  
Open Loop ◽  
Motor Drives ◽  
Numerical Control ◽  
Stepping Motor ◽  
Stick Slip ◽  
Loop Control ◽  
Drive Chain ◽  
Conventional Machine ◽  
Drive Systems

Abstract A model of a conventional, manually driven machine tool slide which is retrofitted for Numerical Control by merely incorporating high-power stepping motor drives, is developed. This model includes the relatively large amount of stick-slip friction in the slideways, and backlash in the drive chain, which characterize the conventional slide. Simulation results obtained using this model highlight the peculiar dynamic behavior, at low speed positioning and contouring operations, of such large stepping motor drive systems under electronically damped open-loop control. The results also demonstrate the feasibility of this low-cost approach to the retrofitting problem, given adequate open- or closed-loop controllers, and provide useful insight into the design of such control systems.

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