| 1. |
- Haghbin, Saeid, 1977, et al.
(författare)
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A trigonometric velocity estimator using a resolver sensor in drive system applications
- 2012
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Ingår i: IECON Proceedings (Industrial Electronics Conference). - 2162-4704 .- 2577-1647. - 9781467324199 ; , s. 2889 - 2894
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Konferensbidrag (refereegranskat)abstract
- Resolver sensors are widely used in the industry to measure the rotor angle position in high performance drive applications. Different methods are employed to estimate the velocity by measuring the rotor angle position. A novel trigonometric velocity estimator is described in this paper that has a simple structure for implementation and there is no need for parameter tuning. The proposed method is practically verified in a permanent magnet motor drive system. The results confirm that the proposed trigonometric velocity estimator has a good dynamic and steady state response subjected to different speed command profiles.
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| 2. |
- Josefsson, Oskar, 1985, et al.
(författare)
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Evaluation and comparison of a two-level and a multilevel inverter for an EV using a modulized battery topology
- 2012
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Ingår i: IECON Proceedings (Industrial Electronics Conference). - 2162-4704 .- 2577-1647. - 9781467324199 ; , s. 2949 - 2956
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Konferensbidrag (refereegranskat)abstract
- This paper analytically evaluates when it is suitable to use a multilevel inverter in an electrified vehicle. The multilevel inverter is compared to a classical two level inverter for different operation points and for different drive cycles.Reliable models of the components which build up the inverter are needed in order to be able to calculate the losses. Analytical models for the losses are developed to be able to compare the two inverters. Since the two inverters utilizes the battery in different ways the losses in the battery is also considered.It is shown that in certain operation points it is an advantage to use a multilevel inverter to achieve a higher efficiency for the inverter but is also shown that in some operation points the multilevel inverter increases the losses in the battery. However, it is worth mentioning that there is a controllability on where in the battery the losses should take place.The multilevel inverter can also be used as a two level inverter in these operation points to minimize the battery losses.
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| 3. |
- Alatalo, Mikael C D, 1959, et al.
(författare)
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Electric Machine Design for Traction Applications Considering Recycling Aspects- Review and New Solution
- 2011
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Ingår i: IECON Proceedings (Industrial Electronics Conference). - 2162-4704 .- 2577-1647. - 9781612849720 ; , s. 1836-1841
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Konferensbidrag (refereegranskat)abstract
- With the expansion of the fleet of electric and hybrid electric vehicles worldwide, it is of interest to consider recycling aspects of the parts that are introduced in these new vehicles. This paper focuses on the design of electrical machines considering recycling of its components. The materials to consider are mainly copper, core materials such as lamination steel or iron, and permanent magnets. One design is suggested with a core material of soft magnetic composites which is very suitable for recycling as it is a brittle material and thus simplifies the access of the copper winding. The suggested design shows to have similar performance to a similar size and similar weight commercial permanent magnet electric machine made with steel lamination. © 2011 IEEE.
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| 4. |
- Amirpour, Sepideh, 1980, et al.
(författare)
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Power Loss Analysis in a SiC/IGBT Propulsion Inverter Including Blanking Time, MOSFET’s Reverse Conduction and the Effect of Thermal Feedback Using a PMSM Model
- 2020
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Ingår i: IECON Proceedings (Industrial Electronics Conference). - 2162-4704 .- 2577-1647. ; :2020, s. 1424-1430
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Konferensbidrag (refereegranskat)abstract
- This paper presents a comparison of power losses for two silicon carbide (SiC) and one silicon insulated gate bipolar transistor (Si IGBT) power modules in a three-phase inverter, when considering the effect of blanking time and the MOSFET's reverse conduction. The total power losses versus different switching frequencies are also compared for the three inverters. The focus of this paper is to determine the influence of junction temperature and thermal feedback on the power loss calculation. The analysis shows that, without accounting for the thermal feedback, the loss levels are substantially underestimated, 11-15% on the conduction losses of the SiC inverters and up to 18% on the switching losses of the IGBT inverter. The data is derived at a chosen high torque, low speed operating point of a permanent magnet synchronous machine (PMSM). The operating point is considered as a worse operating condition from the power loss perspective.
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| 5. |
- Boscaglia, Luca, 1991, et al.
(författare)
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Balancing Peak-torque and Drive-cycle Efficiency with Magnet Dimensioning of Permanent Magnet Synchronous Machines
- 2020
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Ingår i: IECON Proceedings (Industrial Electronics Conference). - 2577-1647 .- 2162-4704. ; 2020-October, s. 883-888
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Konferensbidrag (refereegranskat)abstract
- There is an increasing trend in reducing rare-earth materials due to environmental and cost concerns. It affects design and manufacturing of Permanent Magnet Synchronous Machines (PMSM). Changes in parameters such as size and shape of the magnets will affect requirements as operating efficiency and maximum torque. In this paper, the design of a 250 kW PMSM for a commercial heavy-duty vehicle application is considered in order to evaluate effects of magnets thickness variation on performance and driving cycle efficiency. With this aim, an electromagnetic model is built using Finite Element Method (FEM) and efficiency map computations are carried out to investigate the effects of the magnet variation. System simulations are then implemented in MATLAB/PLECS to evaluate the driving cycle efficiency. Simulation results shown that the reduction of magnet thickness leads to significantly improved operating efficiency with reduction of maximum torque.
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| 6. |
- Cui, Chao, et al.
(författare)
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A Full Power Range ZVS Control Technology for Bidirectional Inductive Power Transfer System
- 2020
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Ingår i: IECON Proceedings (Industrial Electronics Conference). - 2577-1647 .- 2162-4704. ; 2020-October, s. 3861-3865
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Konferensbidrag (refereegranskat)abstract
- Inductive Power Transfer (IPT) technology has received extensive application research due to its safety and convenience. As a circuit topology with high efficiency and high controllability, dual active bridge (DAB) has been used in IPT system in recent years. In high-power applications, the EMI generated by the power device switch becomes more significant, which in turn negatively affects the efficiency and even the stability of the IPT system. There are several ways to reduce EMI. This article studies from the perspective of zero voltage switching (ZVS) of the DAB. When the duty cycle of the full bridge changes, the soft switching may not be maintained. This paper calculates and analyzes the ZVS operating range of the system under different situations. On this basis, a control method is proposed to achieve ZVS in the full power range of the system by adjusting the bilateral load angle. And the efficiency and stability of the system are improved. The correctness of the above theory and control method is verified through simulations.
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| 7. |
- Guo, Xiaorui, et al.
(författare)
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Event-Triggered Consensus Algorithm for Power Sharing with Abnormal Communication in Microgrids
- 2023
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Ingår i: IECON Proceedings (Industrial Electronics Conference). - 2162-4704 .- 2577-1647.
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Konferensbidrag (refereegranskat)abstract
- The precision and stability of droop control are easily affected by the difference of feeder impedance values and hardware filters in islanded inverter-based microgrids with distributed generations. To improve the performance of the conventional droop control, a distributed hierarchical control framework is introduced in this paper for reactive power sharing. Due to limited communication and transmission delays, an improved discrete consensus algorithm is proposed to reduce the overshoot and convergence error. Moreover, according to Lyapunov's second theorem, an event-triggered mechanism is adopted to control time instants of iteration calculation for each agent, and therefore to save communication resources. The proposed control scheme is extended to applications for the case of time-varying communication delays to compensate iteration error and negative effect due to delays in a distributed multi-agent system. To verify the feasibility and superiority of the proposed control scheme, simulations are implemented in MATLAB/Simulink. Several case studies and their results show that the proposed method can improve the convergence speed and the dynamic stability.
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| 8. |
- Hsieh, Meng-Ju, 1985, et al.
(författare)
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Maximum Torque Control Operating Points Estimation for Variable-Speed IM Applications by Parameter-Based Model
- 2023
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Ingår i: IECON Proceedings (Industrial Electronics Conference). - 2162-4704 .- 2577-1647.
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Konferensbidrag (refereegranskat)abstract
- In this work, a follow-up study of estimating optimal operating points by an improved parameter-based model of three-phase induction machines (IMs) is conducted and presented. The main objective is to examine the representation of IMs' parameters within a specified operating boundary. The paper begins by reviewing the theory behind the inverse Gamma-form model (IGFM) and maximum torque control. This review serves as a foundation for developing methods for estimating operating points. Finally, the study compares the results obtained using a 2D electromagnetic finite element method (FEM) model of a 15kW IM with those derived using a parameter-based model obtained through the conventional method, demonstrating the practical utility of the improved parameter-based model.
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| 9. |
- Jiang, Bowen, 1993, et al.
(författare)
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A New Battery Active Balancing Method with Supercapacitor Considering Regeneration Process
- 2020
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Ingår i: IECON Proceedings (Industrial Electronics Conference). - 2577-1647 .- 2162-4704. ; 2020-October:18 October 2020, s. 2364-2369
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Konferensbidrag (refereegranskat)abstract
- Lithium-ion batteries have been widely used in new energy vehicles (NEV) as large energy storage systems (ESS). It is necessary to balance series-connected cells to avoid over-charging or over-discharging as well as to improve the amount of usable energy. This paper starts with a comprehensive review of the existing strategies and gives a battery balancing category. A new balancing topology with its control algorithms is then introduced. A supercapacitor is used in the balancing circuit which replaces the highest state of charge (SOC) cell and is charged during the vehicle regeneration process. The supercapacitor also transfers energy to the lowest SOC cell after it is fully charged. This new strategy can not only improve the balancing efficiency due to fewer times of energy conversion but also reduce the required balancing time compared to single capacitor balancing.
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| 10. |
- Jiang, Bowen, 1993, et al.
(författare)
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A Novel Approach of Electric Powertrain Co-Simulation with High Fidelity Vehicle Model
- 2022
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Ingår i: IECON Proceedings (Industrial Electronics Conference). - 2577-1647 .- 2162-4704. ; 2022-October
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Konferensbidrag (refereegranskat)abstract
- This paper presents a co-simulation approach for an electric vehicle which combines dynamic models of electric machine, inverter, gearbox in PLECS with high fidelity models of driver, autobody, wheel, road and environment in CarMaker. Lumped parameter thermal networks to model heat dissipation in the electric machine and the inverter are also included. The aim is to demonstrate versatility of the co-simulation method in analyzing effects of driver behaviors on thermal performance of electric machine and inverter. Co-simulation results using two simulation tools are compared to those obtained entirely using a single tool. It is observed that performing co-simulation using low fidelity vehicle model results in underestimation of vehicle speed. Further, the impacts of three different driver models on the temperatures of electric machine windings and semiconductor junctions are analyzed. Differences of 30% and 25% in the maximum temperature are observed respectively between an aggressive and a defensive driver.
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