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Showing papers presented at "International Power Electronics and Motion Control Conference in 2021"


Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, a hybrid approach to path planning for mobile robot in variable space is proposed, consisting of off-line global path optimization algorithm and online path planning schemes, which is made using Artificial Bee Colony algorithm.
Abstract: The global path planning for mobile robot in variable robot space is not a trivial matter, since generation of optimal path is very time-consuming. A variable workspace may result in infeasible pre-optimized path, due to new obstacles or worker position. In this paper, a hybrid approach to path planning for mobile robot in variable space is proposed. It consists of off-line global path optimization algorithm and online path planning schemes. The first part requires the definition of most common situations of workers and obstacles positions, and then global optimization of the path for a mobile robot. It is made using Artificial Bee Colony algorithm. The control path points generated from off-line part are used to create a graph in on-line part. Next, the shortest path is selected using Dijkstra’s algorithm. The proposed approach ensures an at least satisfactory path in variable workspace with small computational effort in real-time path planning. The examination was made in Matlab/Simulink environment and the supplementary material, incl. visualization of the considered example, is included.

23 citations


Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, a novel application of Artificial Bee Colony (ABC) algorithm to identification of mechanical parameters in servo-drive system is presented, where several mathematical models, including non-linear one, are applied to identify parameters of considered plant.
Abstract: In this paper, a novel application of Artificial Bee Colony (ABC) algorithm to identification of mechanical parameters in servo-drive system is presented. The accurate identification of mechanical parameters of servo-drive system is essential for synthesis of the servo-drive’s control system. Several mathematical models, including non-linear one, are applied to identify parameters of considered plant. In the proposed approach, the identification is based on angular velocity response and electromagnetic torque generated by the motor. The identified parameters obtained for several configurations of experimental set, i.e. for different moments of inertia and friction components, were compared with another approaches of identification.

14 citations


Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this paper, a sensitivity analysis to charging power, substation distance and section length of overhead contact system is performed in comparison to the conventional two-port dc/dc converter based EV integration.
Abstract: DC traction networks that supply power to trolley-buses, tramcars and trains can be simultaneously used to integrate fast-charging stations for Electric Vehicles (EVs). This strategy improves the traction grid utilization of urban transportation systems. In addition, it offers a potential solution to the increasing requirement of charging infrastructure due to proliferation of plug-in EVs and the associated impact on the existing distribution network. This paper suggests that the use of multi-port converter based integration of EV chargers with dc trolley-bus network can be a preferred solution in terms of defined efficiency boundary. A sensitivity analysis to charging power, substation distance and section length of overhead contact system is performed in comparison to the conventional two-port dc/dc converter based EV integration.

12 citations


Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, a review on the effects of pulse charging of lithium-based battery technology is done, and it is shown that the electrical equivalent circuit analysis of batteries, often used to explain the beneficial results of pulses, is an incomplete analogy to fully explain the results of Pulse charging.
Abstract: In this paper a review on the effects of pulse charging of lithium based battery technology is done. Results published in existing literature are not in complete agreement regarding the effects of pulse charging. Several studies claim to have beneficial effects on charging efficiency, charging time, and capacity fade. While others have found disadvantageous effects on the same parameters. The goal of this paper is to summarize and review these results, based on fundamental theory. Additionally, it will be shown that the electrical equivalent circuit analysis of batteries, often used to explain the beneficial results of pulse charging is an incomplete analogy to fully explain the results of pulse charging.

11 citations


Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, a comparison between the available supercapacitors in the market and selecting the most suitable type for developing super-capacitor-based integrated photovoltaic energy storage systems, to achieve optimal electrical and physical integration is presented.
Abstract: One limitation of photovoltaic energy is the intermittent and fluctuating power output, which does not necessarily follow the consumption profile. Energy storage can mitigate this issue as the generated power can be stored and used at the needed time. Integrating energy storage directly in the PV panel provides advantages in terms of simplified system design, reduced overall cost and increased system flexibility. Incorporating supercapacitors directly in the PV panel on module or cell level raises some challenges regarding the electrical integration, such as charge controlling for the capacitors, capacitor matching, as well as internal power electronics layout. Physical integration of graphene supercapacitors with solar cells, at module- or cell-level presents challenges related to physical dimensioning, thermal management and life expectation of the entire system. The main goal of this article is to review the supercapacitor technologies and perform a comparison between the available supercapacitors in the market and selecting the most suitable type for developing supercapacitor-based integrated PV – energy storage systems, to achieve optimal electrical and physical integration.

11 citations


Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, the authors analyzed the regenerative energy potential and annual energy consumption of the roped elevator system through a case study, based on actual measurements performed on a faculty elevator with a synchronous motor with permanent magnets.
Abstract: This paper analyzes the regenerative energy potential and annual energy consumption of the roped elevator system through a case study. The case study is based on actual measurements performed on a faculty elevator with a synchronous motor with permanent magnets, the non-regenerative power converter, and the regenerative unit. The measurement was carried out for one week under real conditions, and the prediction of annual energy consumption and annual regenerative power generation is made based on the measurement results. The energy efficiency of the system for regenerative and non-regenerative operation of the studied elevator and the total annual energy consumption are calculated according to VDI 4707 and ISO 25745. The obtained results are compared with the predictions based on the measurement results, and the predicted energy savings are presented.

9 citations


Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this paper, the lifetime of two silicon carbide (SiC) and one silicon insulated gate bipolar transistor (Si-IGBT) power modules in a three-phase propulsion inverter for two different driving cycles are compared.
Abstract: This work studies the lifetime of two silicon carbide (SiC) and one silicon insulated gate bipolar transistor (Si-IGBT) power modules in a three-phase propulsion inverter for two different driving cycles. The ECE-City manual and the Worldwide Harmonized Light Vehicles Test Cycle (WLTC) are used as the mission profiles for the lifetime comparisons. For the WLTC, the urban and highway phases are included. The effect of blanking time and the MOSFET’s reverse conduction is considered on the power loss analysis. The lifetime versus different fluid rates of the heatsink are also compared for the three modules over the two mission profiles. The analysis shows that, the WLTC drive cycle causes considerably larger accumulated damage on the three compared modules’ devices, in comparison to ECE-City manual. Moreover, its impact on the SiC-based devices is higher compared to that of the Si-IGBTs. However, the SiC modules present substantially higher lifetime, (> 80%) for WLTC and (>90%) for ECE-City manual, compared to Si-IGBTs. In addition, it is observed that, a reasonable range of fluid flow rate in the heatsink can play a considerable role in improving or reducing the lifetime of the power devices in a reliability-wise optimization.

9 citations


Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, a multi-objective optimization (MOO) method was proposed to find the Pareto front of the DD charging pad, and the optimal design with a 96.82% efficiency was selected as the target design for the DIPT system.
Abstract: This paper aims to investigate the dynamic charging performance of an 11 kW dynamic inductive power transfer (DIPT) system. First, a multi-objective optimization (MOO) method is proposed to find the Pareto front of the DD charging pad. Then, the optimal design with a 96.82% efficiency is selected as the target design for the DIPT system. Based on the coupler mutual inductance at different misalignment, the orientation of the transmitter (Tx) and receiver (Rx) pads and the distance between Tx pads are studied and optimized. To obtain the dynamic characteristics of the DIPT system, the impact of mutual inductance variation is investigated, and a dynamic model using Laplace phasor transformation is built to solve the waveform amplitude of electrical variables. Finally, a time-variant circuit model is built. Based on the simulations, the dynamic model is proved to be accurate, and the proposed DIPT system displays a good dynamic charging performance.

8 citations


Proceedings ArticleDOI
25 Apr 2021
TL;DR: The idea of using spectral analysis of the stator phase current signal and its envelope to symptom extraction and the support vector machine to classify the fault is proposed and to assess the effectiveness of the proposed diagnostic method, experimental tests were conducted.
Abstract: This paper deals with the topic of detecting and classifying one of the most common faults of permanent magnet synchronous motor – interturn short circuits. The idea of using spectral analysis of the stator phase current signal and its envelope to symptom extraction and the support vector machine to classify the fault is proposed. To assess the effectiveness of the proposed diagnostic method, experimental tests were conducted. The object of the experimental verification was a 2.5kW permanent magnet synchronous motor operating in a closed-loop control structure. The impact of changes in motor operating conditions on the effectiveness of failure classification has also been tested.

8 citations


Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this paper, the potential of utilizing the Dual Active Bridge (DAB) converter as a 10 kW Power Electronics Building Block (PEBB) for the charging of electric vehicles where a wide output voltage range is required.
Abstract: This paper verifies the potential of utilizing the Dual Active Bridge (DAB) converter as a 10 kW Power Electronics Building Block (PEBB) for the charging of Electric Vehicles (EVs) where a wide output voltage range is required. Following the tendency of the new EV charging standards from CCS and CHAdeMO, the commonly employed isolated DC-DC converter should be able to supply the rated power for different vehicles which employ battery technologies which could range from 300 V up to 1000 V. Rectangular (or phase-shift), triangular and trapezoidal modulation strategies are investigated, of which the last two techniques are used for designing the PEBB. Suitable SiC-based semiconductors are chosen, the passive components are designed and the power losses are derived for the whole operating range. It is found that a high power efficiency can be achieved using the designed system.

7 citations


Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, the authors developed a new small scale logistic robot to move boxes in rather tight spaces, using AI and machine vision techniques to achieve flexibility and cost-effectiveness.
Abstract: The rapid development of intelligent control technology has affected the logistics industry and led to the implementation of new concepts of autonomous indoor logistic robots. These robots are operating inside warehouses and factories to move goods and packages around in the rooms. There is a high motivation to reduce the cost of these mobile robots as well as to create flexible control systems. Tallinn University of Technology in cooperation with a Kulinaaria production plant has developed a new small scale logistic robot to move boxes in rather tight spaces. New technology, including AI and machine vision, is applied to achieve the flexibility and cost-effectiveness of the newly developed mobile robot solution.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this paper, a proportional resonant (PR) controller in a three-phase four-leg voltage source inverter (VSI) was tuned by means of self-tuning method.
Abstract: This paper is devoted to tuning of proportional resonant (PR) controller in a three-phase four-leg voltage source inverter (VSI) by means of self-tuning method The purpose of this tuning is to improve the quality of output voltage of the VSI which connects distribution generation (DG) units to micro grid along with that independently control each phase load voltage The controller scheme is composed of an inner current control loop to control output current and an outer voltage control loop to control output voltage using proportional and practical swarm optimization (PSO) based PR regulator PSO is one of the widely used intelligent searching algorithm that is applied for self-tuning of the power control parameters The proposed method shows good tracking of the reference output voltage in the static and dynamic modes and satisfy the voltage quality requirements and proves the validity of the proposed strategy Studies of different loads on VSI are carried out using MATLAB/SIMULINK, simulation results demonstrate the effectiveness of the proposed approach

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this paper, the authors compared the influences of two different charging strategies on the performance of the EV charging system, including the EV battery, the battery management system (BMS), and the power electronic converter.
Abstract: This paper compares the influences of two different charging strategies on the performance of the Electric Vehicle (EV) charging system, including the EV battery, the Battery Management System (BMS), and the power electronic converter. Firstly, the two types of EV charging strategies are explained. Herein, the characteristics, the influences on the EV battery, and the respective requirements for the hardware and communication of the BMS and power electronic converter are summarized. Secondly, a simulation case study is conducted to investigate the influences of the two charging strategies on the performance of a typical power electronic converters employed as a back-end converter of a fast EV charger. A modular 50kW DC-DC EV charger constructed with five parallel-connected 10kW Phase-Shift Full-Bridge (PSFB) DC-DC converter is modelled with two different charging strategies, and two comparison metrics are proposed for a benchmark: the charging-cycle efficiency and the installation utilization rate. The results show that these two comparison metrics are influenced by the charging strategies of the EV.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, the Virtual Current Sensor (VCS) algorithm based on the direct current (DC) voltage and the rotor angular velocity is proposed to reconstruct the values of the stator phase currents in a stationary reference frame.
Abstract: In this paper current sensor fault tolerant control for direct rotor flux oriented induction motor drive has been presented. The simulation tests have been carried out when A-phase or/and B-phase sensors have failed. The solution proposes the use of the Virtual Current Sensor (VCS) algorithm based on the direct current (DC) voltage and the rotor angular velocity, which is reconstructing the values of the stator phase currents in a stationary reference frame (α-β). A simple algorithm for detecting and locating current sensor fault has been proposed. Simulation studies under different operating conditions of the drive showed high efficiency of the presented method.

Proceedings ArticleDOI
Salvatore D'Arco1, Jon Are Suul1
25 Apr 2021
TL;DR: In this paper, a feed-forward control method for improving the power reference tracking performance of virtual synchronous machines (VSMs) without compromising their main features in terms of grid forming capability and inertia emulation is presented.
Abstract: This paper presents a feed-forward control method for improving the power reference tracking performance of Virtual Synchronous Machines (VSMs) without compromising their main features in terms of grid forming capability and inertia emulation. The proposed approach acts directly on the phase angle used for reference frame transformations in the control system and can be generally applied to all VSM-based control schemes relying on a virtual swing equation. A small-signal model of a selected VSM implementation with the proposed feedforward control is derived. This model is utilized to assess the impact of the power reference feedforward on the operational characteristics of the VSM. The improvement of the power reference tracking capability is demonstrated by analysing the transfer function from the power reference to the power injected to the grid, as extracted from the small-signal model. The frequency domain analysis also demonstrates how the oscillation modes of the VSM and the inertial response to grid frequency perturbations remain unaffected by the proposed feed-forward control. Finally, the findings from the frequency domain analysis are verified by time domain simulations.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this paper, the authors describe and simulate different differential order synchronous machine models in MATLAB and evaluate the response of the models on the three phase short circuit fault, including pros and cons of each model as well as appropriate applications.
Abstract: The descriptions and simulations of different differential order synchronous machine models are analyzed in this paper. Focus is paid on the Power System Analyses Toolbox models in the Simulink environment (MATLAB). The response of the models on the three-phase short circuit fault is evaluated, including pros and cons of each model as well as appropriate applications. The verification of the results is based on comparison with another independent synchronous machine model and analytical three phase short circuit calculation based on the operational measurements and observations.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this paper, the authors explored the opportunities in the context of IoT industrial applications, where these opportunities will be explored in a work in progress, where they explored the possibilities of using IoT in diagnostics related to the detection or prediction of faults.
Abstract: Internet of Things (IoT) has seen rapid growth along with the recent advancement in information and communication area. With the introduction of new technologies, it has become easier to interact with machines and communicate with them. IoT cannot only be used to communicate and control these machines but it can be used further in diagnostics related to the detection or prediction of faults. As the infrastructure is advancing at a rapid speed, it has also become a need of the hour to update the way diagnostics and maintenance are carried out over them, to not only save cost but also time. This paper is a work in progress, where these opportunities will be explored in the context of IoT industrial applications.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this paper, the authors focused on the challenges in design and control of power converter for battery energy storage system (BESS) with the focus on power converter and its control.
Abstract: This paper is focused on the challenges in design and control of power converter for Battery Energy Storage System (BESS). This paper sums up design of small-scale prototype for BESS with the focus on power converter and its control. The first part of the paper explains converter topology selection, design of output LC filter and transformer. The second part of the paper describes control algorithm and feed-forward model derivation. Finally, the model simulation results and its validation are presented. The designed system with BESS 60 kW/30 kWh will be used for power peak-shaving (reduction of maximal demanded power) in the laboratory for testing of traction drives and as technological demonstrator for larger 5 MW device.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this paper, the transient thermal model of the Permanent Magnet Synchronous Motor (PMSM) and the airflow cooling model through the ribs in the stator lamination are discussed.
Abstract: This paper is focused on the transient thermal model of the Permanent Magnet Synchronous Motor (PMSM) and the airflow cooling model through the ribs in the stator lamination. The stator lamination has a new specialized designed shape. This type of lamination does not need a frame, and the lamination is directly cooled. It has reduced the thermal resistance between the cooling medium and stator lamination. The thermal model is loaded with variable Power, and the airflow speed of cooling air is variable. Thermal models are solved by software ANSYS CFX and Mechanical. The thermal model of PMSM is based on the traction motor. This machine is designed as enclosed. The modelled PMSM is used in the electric racing formula.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, an extremum seeking based adaptive active damping control method that is adaptive to different grid impedances is proposed to improve damping performance and stability of the active front end converter.
Abstract: Grid current feedback based Active Damping (AD) method is a preferable option in Active Front End (AFE) converter due to the need for less number of sensors and cost efficiency. However, AD performance is dependent on the model knowledge about LCL filter parameters and resonant frequency. In practical system, grid impedance is possibly not known, thus, in combination with LCL filter, resonant frequency is changed while stability margins and performance reduced. To address this problem, this paper proposes extremum seeking based adaptive active damping control method that is adaptive to different grid impedances, consequentially improving damping performance and stability of the active front end converter. The proposed method is verified through extensive simulations.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, three main types of interpolation algorithms for NURBS toolpaths are investigated: Taylor series interpolation, predictor-corrector interpolation and feedrate correction polynomial interpolation.
Abstract: In state of the art computerized numerically controlled (CNC) machines toolpaths are often defined as polynomial Non-Uniform Rational B-Spline (NURBS) curves. This article investigates three main types of interpolation algorithms for NURBS toolpaths. These are Taylor series interpolation (TSI), predictor-corrector interpolation (PCI) and feedrate correction polynomial interpolation (FCPI). Interpolation accuracy of each method is investigated for an example NURBS toolpath. Interpolation computation time is also investigated for each method. Results are presented that compare the accuracy and computation efficiency of each method. It is shown that the Predictor-Corrector interpolation method achieves the best accuracy of the investigated methods without significant increase in computation time.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, the selected topology of traction substation is described with the respect to industrial component parameters (25kV/50 Hz, substation power 12.5MVA, 3kV DC-link, switching frequency 250 Hz).
Abstract: This paper deals with study of operating states for AC traction substation. The selected topology of traction substation is described in paper. The topology suitability is discussed with the respect to industrial component parameters (25kV/50 Hz, substation power 12. 5MVA, 3kV DC-link, switching frequency 250 Hz). The basic theory of power balancing and power quality is documented on phasor diagram and simulation results. The simulation results document selected operation states of electronic balancer based on Cascaded H-bridge converter with PS-PWM.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, a speed sensorless control algorithm is designed utilizing the model reference adaptive system (MRAS) based on a Luenberger observer (LO), which estimates rotor speed and shaft position.
Abstract: Interior permanent magnet synchronous motor (IPMSM) salient pole structure drives benefits in utilizing in higher-performance industrial applications. For high-performance application, the control of IPMSM required precise information of rotor angular velocity and shaft position. The speed sensorless control algorithm is designed utilizing the model reference adaptive system (MRAS) based on a Luenberger observer (LO). The Adaptive Luenberger Observer (ALO) estimates rotor speed and used for speed self-sensing control. Due to the MRAS approach, the self-sensing speed control shows sensitivity to stator resistance. To address the effect of parameter variation, the stator resistance is estimated and utilized for efficient control performance. Maximum torque per armature (MTPA) algorithm is used to attain the maximum torque under the minimum phase current. The electrical parameters are estimated based on Popov’s stability criterion. To present the usefulness of the designed speed self-sensing control algorithm, the simulation is executed in Matlab/Simulink. The simulation result shows that the sensorless control algorithm can effectively estimate the shaft speed and position with the help of the state variable and attain steady-state and dynamic performance with computational complexity reduction.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this paper, a new state-space model is presented to represent the four types of currents flowing through a modular multilevel converter (MMC) topology, which adapts itself to the number of AC phases, active or passive nature of the AC-side grid, and the connection between the AC and DC neutral points.
Abstract: This paper presents a new state-space model (SSM) to represent the four types of currents flowing through a Modular Multilevel Converter (MMC). In line with the converter topology, the model itself is modular. In other words, its configuration adapts itself to the number of AC phases, to the active or passive nature of the AC-side grid, to the connection between the AC and DC neutral points, and to the number of submodules. The model describes the influence of the MMC arm voltages on the currents using an average behavior of the submodules. Simulations performed using a software dedicated to electrical engineering systems demonstrate the value and the accuracy of the proposed model.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, a case study of electrical machine faults, emerging in heat pump systems, is presented, where the setup of the systems is explained, faults are listed and presented, causes of the faults including modeling and measurement data are provided.
Abstract: This paper presents a case study of electrical machine faults, emerging in heat pump systems. In Nordic countries, heat pumps have been gaining popularity during the past years and have become one of the leading ways of heating in households and smaller public buildings. Although not a very complicated setup, the devices used are still prone to unexpected failures, especially if wrongly chosen, installed or maintained. The paper presents a study conducted on five real-life cases with very similar outcomes and failure modes. The setup of the systems is explained, faults are listed and presented, causes of the faults including modeling and measurement data are provided. The suggestions are given to overcome such faults in similar setups in the future.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, the feedback linearization based control of DC/DC buck converter, the output voltage controlled, is presented, where the presence of parasitic elements are not studied in detail in a previous article, therefore the applied state space model are taking into account of those.
Abstract: This paper presents the feedback linearization based control of DC/DC buck converter, the output voltage controlled. Also, the presence of parasitic elements are not studied in detail in a previous article, therefore the applied state space model are taking into account of those. The high slew rate of the controller cause inrush current during start-up, which have been examined and reduced. The linearized system has been investigated with linear quadratic regulator (LQR) through an example and simulated via Matlab.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, the authors presented the possibility of using higher-order transforms to detect unbalance in permanent magnet synchronous motors (PMSM) by means of mechanical vibration analysis.
Abstract: The paper presents the possibility of using higher-order transforms to detect unbalance in permanent magnet synchronous motors (PMSM). The phenomenon of unbalance and the method of its detection by means of mechanical vibration analysis are described. Bispectrum analysis and full spectrum transform were used to detect damage and their effectiveness was compared with those obtained using classical fast Fourier transform. The research methodology based on the signal of mechanical vibration acquisition is presented and the results obtained are discussed.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, the authors describe the basic principles of digital twins' design of the manipulator, taking into account its dynamic and mass-dimensional characteristics, and show that the use of polynomial algorithms in the control system provides the best solution for the quality of technological operations and provides standard tolerance grades and limit deviations within IT7.
Abstract: Nowadays digital twin technology is a powerful tool for describing, controlling, and displaying the behavior of a real object of robotic systems. This technology is currently planned for widespread application in the Industry 4.0. And one of the important tasks in this area is the creation of a dynamic model of the object in the simulation program. The article describes the basic principles of digital twins’ design of the manipulator, taking into account its dynamic and mass-dimensional characteristics. It was shown that the use of polynomial algorithms in the control system provides the best solution for the quality of technological operations and provides standard tolerance grades and limit deviations within IT7.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, a front-end Modular Multi-Parallel Rectifiers (MMR) system with a shared DC-link is proposed and a generalised mathematical representation for n number of parallel rectifiers is proposed.
Abstract: This paper proposes a comprehensive steady-state analysis for a front-end Modular Multi-Parallel Rectifiers (MMR) system with a shared DC-link. A generalised mathematical representation for n number of parallel rectifiers is proposed. The MMR is analysed for both Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM). In addition, the CCM and DCM boundary of the MMR is identified mathematically. A 60kW Simulink model for the MMR is utilised to confirm the proposed steady-state mathematical modelling equations.

Proceedings ArticleDOI
25 Apr 2021
TL;DR: In this article, a hybrid switch (HyS) based inverter for the application of electric vehicle (EV) traction is compared to the conventional inverter assembled with Si-based IGBTs and SiC-based MOS-FETs.
Abstract: The parallel connection of a Silicon (Si)-based IGBT and a Silicon Carbide (SiC)-based MOSFET forming a so called hybrid switch (HyS) can be used to exploit the advantageous features of both semiconductor and materials technologies. In this paper, a HyS-based inverter designed for the application of Electric Vehicle (EV) traction is compared to the conventional inverter assembled with Si-based IGBTs and SiC-based MOS-FETs. According to different standardized driving cycles, EVs operate in low partial load for a considerable amount of the time. Therefore, in this application, semiconductor conduction losses can be considerably reduced when unipolar switches such as MOSFETs are used. All in all, this work shows that the HyS configuration constitutes a good compromise between efficiency and cost when compared to the solution implementing only Si-based IGBT or solely SiC-based MOSFETs.