Detailed Simulation Model of an Asymmetrical Half-Bridge PWM Converter with Synchronous Rectification including Parasitic Elements

2020 ◽  
Author(s):  
Benedikt Kohlhepp ◽  
Valentin Zeller ◽  
Markus Barwig ◽  
Thomas Durbaum
Keyword(s):  
Simulation Model ◽  
Pwm Converter ◽  
Synchronous Rectification ◽  
Detailed Simulation

scholarly journals A Joint-space Position Control-based Approach to Haptic Rendering of Stiff Objects using Gain Scheduling

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Yang Wang ◽  
Lei Feng ◽  
Kjell Andersson
Keyword(s):  
Simulation Model ◽  
Position Control ◽  
Gain Scheduling ◽  
Joint Space ◽  
Haptic Rendering ◽  
Smooth Transition ◽  
Position Controller ◽  
Detailed Simulation ◽  
Stability Issues ◽  
Computing Models

AbstractHaptic rendering often deals with interactions between stiff objects. A traditional way of force computing models the interaction using a spring-damper system, which suffers from stability issues when the desired stiffness is high. Instead of computing a force, this paper continues to explore shifting the focus to rendering an interaction with no penetration, which can be accomplished by using a position controller in the joint space using the encoders as feedback directly. In order to make this approach easily adaptable to any device, an alternative way to model the dynamics of the device is also presented, which is to linearize a detailed simulation model. As a family of linearized models is used to approximate the full dynamic model of the system, it is important to have a smooth transition between multiple sets of controller gains generated based on these models. Gain scheduling is introduced to improve the performance in certain areas and a comparison among three controllers is conducted in a simulation setup.

scholarly journals Efficiency analysis of an induction motor with direct torque and flux control at a hot rolling mill

2015 ◽  
Vol 26 (3) ◽  
pp. 111-115
Author(s):  
Rupert Gouws
Keyword(s):  
Simulation Model ◽  
Induction Motor ◽  
Hot Rolling ◽  
Rolling Mill ◽  
Original System ◽  
Efficiency Analysis ◽  
Flux Control ◽  
Rolling Mills ◽  
Detailed Simulation ◽  
Hot Rolling Mill

This paper presents an efficiency analysis of an induction motor with direct torque and flux control at a hot rolling mill in South Africa. Two scenarios were evaluated: 1) where the induction motor was controlled at a constant speed with a variable thickness slab; and 2) where the speed of the induction motor was controlled according to the thickness of the slab. Both scenarios used the speed as reference to control the torque and flux of the induction motor. A comparison on the energy consumption of the induction motor for both scenarios was done by means of a detailed simulation model. The simulation model for this specific case study is explained in detail. The results obtained showed an increase in the efficiency of the induction motor from the original system (scenario 1) to the improved system (scenario 2). Part of this paper provides an overview on hot rolling mills.

scholarly journals Evaluation of Location-Specific Predictions by a Detailed Simulation Model of Aedes aegypti Populations

PLoS ONE ◽  
2011 ◽  
Vol 6 (7) ◽  
pp. e22701 ◽  
Author(s):  
Mathieu Legros ◽  
Krisztian Magori ◽  
Amy C. Morrison ◽  
Chonggang Xu ◽  
Thomas W. Scott ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Simulation Model ◽  
Detailed Simulation

Utilization of Coupled Simulation in the Fatigue Loads Prediction of a Hydraulically Driven Log Crane

2001 ◽  
Author(s):  
Aki M. Mikkola
Keyword(s):  
Simulation Model ◽  
Dynamic Simulation ◽  
Fatigue Damage ◽  
Hydraulic System ◽  
Software Environment ◽  
Welded Structures ◽  
Mechanism Model ◽  
Detailed Simulation ◽  
Flexible Mechanism ◽  
Fatigue Loads

Abstract Welded structures, such as hydraulically driven booms, are disposed to fatigue damage. Design against fatigue requires information on the fatigue resistance of a structure’s critical details and the fatigue loads that act on each detail. The present paper introduces a method based on dynamic simulation for determining the fatigue loads in a hydraulically driven log crane. The detailed simulation model was built up in the MBS-software environment in which the flexible mechanism model and the equations describing the hydraulic system were combined. The complete simulation model was verified by comparing measurements to numerical results. This comparison shows that there is a clear correspondence between the simulated and measured results. It was thus shown that it is possible to create a simulation model which can be used realistically for determining stresses in fatigue analysis. The model was employed in the study of the fatigue loads, which are formed when the crane is being loaded.

scholarly journals Design of Microgrid Protection Schemes Using PSCAD/EMTDC and ETAP Programs

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5784 ◽  
Author(s):  
Hyun Shin ◽  
Sang Heon Chae ◽  
Eel-Hwan Kim
Keyword(s):  
Power System ◽  
Simulation Model ◽  
Computer Aided Design ◽  
Storage System ◽  
Circuit Breaker ◽  
Small Scale ◽  
Distributed Resources ◽  
Protective Relay ◽  
Detailed Simulation ◽  
Switching Devices

Steady-state, harmonics, and transient analysis of a power system by using a detailed simulation model is essential to microgrid operation before the installation of new power facilities, because the microgrid, which is a small-scale independent power grid consisting of distributed resources and an energy storage system, has no choice but to include many inverters consisting of switching devices. Accordingly, in the case of an accident in a microgrid system, various power system simulation tools must be used to calculate the fault current for grid protection components. Specifically, Modelling using Power System Computer Aided Design (PSCAD)/Electro-Magnetic Transient Design and Control (EMTDC) can perform detailed modeling of switching devices into each inverter, and Electrical Transient Analyzer Program (ETAP) can design protection relays. From this perspective, this study designed whole protection components in a microgrid system, including the capacity of switching devices for fault ride through a protective relay and the capacity of the circuit breaker. The parameters of an actual microgrid on the San Cristobal Island, Galapagos, were used to make a detailed simulation model in both PSCAD/EMTDC and ETAP. The capacities of the switching devices were estimated by using PSCAD/EMTDC. Additionally, the rated breaking capacities and the setting values of the protective relay were also calculated from the result of an ETAP simulation.

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