A Study on a Controller to Suppress Periodic Speed Variation

2003 ◽  
Vol 22 (1) ◽  
pp. 33-45 ◽  
Author(s):  
Manabu Kosaka ◽  
Hiroshi Uda ◽  
Eiichi Bamba
Keyword(s):  
Energy Consumption ◽  
Repetitive Control ◽  
Sine Wave ◽  
Motor Speed ◽  
Angle Sensor ◽  
Tuning Parameters ◽  
Speed Variation ◽  
Reference Velocity ◽  
Velocity Changes ◽  
Increase Energy Consumption

This paper is concerned with a practical controller to suppress the periodic speed variation of a motor. Speed variation in a pump, a compressor or a wheel of an electric vehicle causes vibration and noise, which shorten the life of the machine. Although repetitive control can suppress the speed variation, there are the following problems: If a reference velocity changes, the period of the speed variation changes and the effect of the suppression is reduced. The tuning parameters are difficult to tune. In the case where a low-resolution angle sensor is used, the output of the controller to suppress the speed variation becomes pulse-shaped and causes harmonic ripples that increase energy consumption. In order to eliminate the harmonic ripples, we propose a controller of which the output is interpolated with a sine wave.

The Influence of Variable-Speed Waveforms on Vibration Suppression in Time-Varying Speed Cutting

2013 ◽  
Vol 690-693 ◽  
pp. 2514-2518
Author(s):  
Juan Cong ◽  
Yun Wang ◽  
Wei Na Yu
Keyword(s):  
Wave Speed ◽  
Vibration Suppression ◽  
Sine Wave ◽  
Time Varying ◽  
Variable Speed ◽  
Suppression Effect ◽  
Speed Variation ◽  
Input And Output ◽  
System Input ◽  
Better Than

Through the research on the change of system input and output energy in time-varying speed cutting, the influence of variable-speed waveforms on vibration suppression effect in time-varying speed cutting is quantitatively analyzed in this paper. A conclusion can be drawn that sine wave speed variation is better than triangle wave speed variation in vibration suppression.

scholarly journals Operational Aspects of Electric Vehicles from Car-Sharing Systems

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4614 ◽  
Author(s):  
Katarzyna Turoń ◽  
Andrzej Kubik ◽  
Feng Chen
Keyword(s):  
Energy Consumption ◽  
Electric Vehicles ◽  
Scientific Information ◽  
Electricity Consumption ◽  
Car Sharing ◽  
Electric Cars ◽  
Research Gap ◽  
Research Experiment ◽  
Operational Aspects ◽  
Increase Energy Consumption

The article was dedicated to the topic of energy consumption of driving cars equipped with an electric motor. Due to the emerging demands for the excessive use of energy by vehicles (including car-sharing system vehicles), the authors carried out research to determine factors that affect the energy consumption. Due to the occurrence of a research gap related to the lack of reliable scientific information regarding real electricity consumption by vehicles used in car-sharing systems, the authors attempted to determine these values based on the proposed research experiment. The purpose of the research was to identify factors that increase energy consumption while driving in the case of car-sharing systems and developing recommendations for users of car-sharing systems and system operators in relation to energy consumption. Based on data received from car-sharing system operators and to their demands that users move cars uneconomically and use too much energy, the authors performed a scientific experiment based on Hartley’s plan. The authors made journeys with electric cars from car-sharing (measurements) in order to compare real consumption with data obtained from operators. As a result, the authors developed a list of factors that negatively affect the energy consumption of electric vehicles from car-sharing systems. As conclusion, a number of recommendations were developed for car-sharing system operators on how to manage their systems to reduce excessive energy consumption in electric vehicles.

scholarly journals Comparative analysis of PD-PWM technique in the set: Multilevel Inverter-Induction motor

2020 ◽  
Vol 21 (1) ◽  
pp. 1-8
Author(s):  
Yesenia Reyes Severiano ◽  
Jesús Aguayo Alquicira ◽  
Susana Estefany De León Aldaco ◽  
Luis Mauricio Carrillo Santos
Keyword(s):  
Energy Consumption ◽  
Comparative Analysis ◽  
Induction Motor ◽  
Induction Motors ◽  
Electrical Energy ◽  
Power Converter ◽  
Multilevel Inverter ◽  
Motor Speed ◽  
Three Phase ◽  
Cascaded Multilevel Inverter

Currently, induction motors are widely used in industry because have a high potential for the efficiency improvement. Therefore, a topic of interest to the industry is to reduce the energy consumption of induction motors, as they represent almost half of the total electrical energy consumption in the world. The energy consumption of electric motors can be reduced by using motors that are more efficient and by using power converters to feed the motors, thereby enabling accurate control according to the load. The function of the power converter is to modify the intrinsic characteristics of the induction motor (speed and torque). There are different topologies of the power converter commonly called inverter for induction motors. An inverter requires a modulation strategy for its operation, there are several modulation strategies that are used in the induction converter-motor assembly. This paper presents the comparative analysis of the influence of the phase disposition modulation (PD-PWM) strategy with different modulation indices, on parameters related to the output signal of a seven-level cascaded multilevel inverter as well as on the nominal working conditions of a three-phase induction motor.

Energieeffizienz durch Oberschwingungsreduzierung*/Energy efficiency through harmonic distortion reduction – Harmonics-minimized control strategy in production machines

2019 ◽  
Vol 109 (10) ◽  
pp. 793-800
Author(s):  
S. Ju ◽  
N. Hanenkamp
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Power Electronics ◽  
Control Strategy ◽  
Harmonic Distortion ◽  
Wird Eine ◽  
Motor Speed ◽  
Increase Energy Efficiency ◽  
Fundamental Oscillation ◽  
Distortion Reduction

Oberschwingungen durch frequenzgeregelte Antriebe wirken sich stark negativ auf den Energieverbrauch aus. Diese Oberschwingungen verstärken sich immer dann, wenn schnelle Drehzahländerungen aus Produktivitätsgründen notwendig sind. Zur Kompensation dieser Effekte müssen Steuerungsstrategien optimiert und weiterentwickelt werden. Durch die Erhöhung des Grundschwingungsanteils im Motorsteuersignal lässt sich die Energieeffizienz um bis zu 20 % steigern. Um dieses Ziel zu erreichen, wird eine Bibliothek standardisierter Steuerungsbausteine entwickelt.   The effect of harmonic distortions triggered by frequency-controlled power electronics on energy consumption is non-negligible. These distortions increase when productivity-related accelerations and decelerations occur. A new control strategy has been developed. By increasing the fundamental oscillation ratio in the motor speed changing process, it is possible to increase energy efficiency by up to 20 %. A library model has been developed.

F-RBFNN Used for Tuning Parameters of Adaptive PID Control for the Drive Motor of Car Dumper

2014 ◽  
Vol 915-916 ◽  
pp. 430-435
Author(s):  
Fa Yi Cui ◽  
Lei Lei Ma
Keyword(s):  
Pid Control ◽  
Dynamic Performance ◽  
Practical Significance ◽  
Motor Speed ◽  
Tuning Parameters ◽  
Parameters Tuning ◽  
Drive Motor ◽  
Adaptive Pid Control ◽  
Online Tuning ◽  
Roll Drive

In the current environment of energy saving, dumper run energy efficiently that has great practical significance. The drive motor speed determines the roll-over machine efficiency, with the result that motor speed optimal control using adaptive PID control system. Contrary to the volume of PID control, using neural network online-tuning; On hand of network selection, RBFNN and F-RBFNN are selected. Compared with the classical PID control, the PID control based on F-RBFNN and RBFNN achieve the amount of online tuning the parameters of PID control. Especially, compared with RBFNN, F-RBFNN which combines a fuzzy logic technology and RBFNN is more suitable for real-time nonlinear control of the roll drive motor speed. Because parameters tuning more rapidly and static and dynamic performance and anti-interference ability more powerfully.

Dynamics of energy consumption, real sector value added and growth in energy deficient economies

2020 ◽  
Vol 14 (5) ◽  
pp. 1001-1022 ◽  
Author(s):  
Ebere Ume Kalu ◽  
Uchenna Florence Nwafor ◽  
Chinwe R. Okoyeuzu ◽  
Vincent A. Onodugo
Keyword(s):  
Energy Consumption ◽  
Development Policy ◽  
Value Added ◽  
Real Sector ◽  
Panel Estimation ◽  
Dynamic Panel ◽  
Content Type ◽  
Energy Deficiency ◽  
Ssa Countries ◽  
Increase Energy Consumption

Purpose The purpose of this study is to investigate the energy–growth linkage in sub-Saharan Africa (SSA), with emphasis on real sectors’ contribution to aggregate growth using dynamic panel estimation techniques that are practically and conceptually superior to the static models. Design/methodology/approach Dynamic panel econometric techniques pooled mean group, mean group and dynamic fixed effect were used to investigate the linkage among energy consumption, real sector value added and economic growth from 1967 to 2016 in 48 SSA countries. Findings A strong empirical evidence in favor of energy dependence and growth hypothesis in the investigated SSA countries was found. The finding that real sector value added and overall growth rate adjust reasonably to the shocks and dynamics of the energy consumption variables makes energy consumption an enabler for growth. This indicates that well thought-out and implemented energy development policy will not only increase energy consumption but also elicit multi-sectoral growth while addressing the obvious energy deficiency in the SSA region. Research limitations/implications It is also important to note the policy implications of the high adjustment profiles indicated by the error correction representations. All the speeds of adjustment of the three models denominated in time are slightly above a year and are all within predictable limits (they fall below unity or 100%). We found that when agriculture value added, manufacturing value added and overall economic growth rate in our SSA panel estimation exceed equilibrium levels as a result of deviations arising from energy related variables, downward adjustments at 66%, 62% and 78% per year, respectively, take place. Practical implications The study indicates that well thought-out and implemented energy development policy will not only increase energy consumption but also elicit multi-sectoral growth while addressing the obvious energy deficiency in the SSA region. Social implications Much as this study has made some addition to the literature on energy-growth nexus in the SSA region, which undoubtedly is an unveiling of economic forces in a collection of developing and energy deficient economies, it will be of great research significance if the form and style of this study is adopted for other economic blocs in the shapes and sizes of the SSA region. Originality/value This study ensured currency of data, novelty of approach and disaggregated energy consumption into emerging sources, traditional sources and geographical access.

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