The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper deals with the study and implementation of a losses minimization control method for an integrated multi-drives topology used to interface a multi windings induction machine to more storage units in hybrid electric vehicle parallel drivetrains. The main target is to optimize the management of multi-directional power flows, by reducing the power losses in the induction machine as well as...
The paper proposes a simple method to estimate the stator resistance and rotor permanent magnet flux in a dual-three phase permanent magnet synchronous machine. This is accomplished by setting to zero for a short time the phase currents on one of the three-phase winding set, while the other is tasked to generate the whole motor torque. With the proposed method, the drive can operate properly without...
The accurate modeling of electrochemical batteries has to be considered a significant issue in the design of control algorithms applied to energy storage systems. In this paper, a comprehensive analysis of Energy Storage System models based on equivalent electric circuits is presented. Such models are compared by means of a multi-criteria approach considering performance, applications, battery technologies...
The paper proposes a simple method to enhance rotor position estimation carried out from back-EMF observers on sensorless dual-three phase permanent magnet synchronous motor drives. The influence of magnetic saturation and temperature variation on the estimated rotor flux position are mitigated through a direct back-EMF measurement. This is accomplished by setting to zero for a short time the phase...
A three-channel interleaved Power Factor Correction (PFC) based on a new digital controller STNRGPF01 [7] operating in Continuous Conduction Mode (CCM) is presented in this paper. The control structure is based on a mixed signal concept where the time critical functions such as input current control and fast over current protections are performed using analog parts. All the non-time critical functions,...
The paper deals with an extensive analysis of power converters failures in AC motor drives by exploiting the capability of a hardware-in-the-loop (HIL) simulation platform to emulate the real-time behavior of electrical machines and power converters. In this way it is possible to investigate the effects of power converter faults in electrical drives with the aim to propose solutions that allow to...
The main purpose of this paper is to provide a comprehensive study of an online energy management strategy devoted to hybrid electric vehicle (HEV) parallel drivetrains adopting an integrated multi-drives topology to interface a multi winding induction machine with the on-board hybrid storage units. This solution is designed to allow multi-directional power flows among the storage units and the drivetrain...
With the aim to improve the energy management of battery packs in stand-alone power supply applications, a simple but effective model-based algorithm for battery state estimation has been developed. The method can be classified into the category of PI-based observers and exploits a Thevenin-based equivalent circuit to model the battery behavior associated with a simple start-up identification process...
A new approach, based on a current controlled Asymmetrical Hybrid Multilevel Inverter (AHMLI), is proposed to reduce power losses and output current distortion on Multi-Level Inverters (MLI) used in AC motor drives, STAT COM devices, Photovoltaic and Wind generators. A key feature of the proposed approach is that the AC machine (motor or transformer) is operated in an open-end winding configuration,...
A two-stage converter working in dual mode time sharing is proposed for single-phase photovoltaic applications. The converter encompasses a dual boost front end and a single-phase three-level Neutral Point Clamped grid inverter. According to the time sharing strategy, the boost stage is by-passed and only the Neutral Point Clamped inverter is operated when the input voltage is greater than the actual...
The paper deals with an optimal technical solution to realize autonomous water pumping systems combining a PV electric energy source with battery chemical storage to supply a centrifugal electrical pump. The goal is to accomplish an optimal trade-off between the rated peak power of the PV generator and the power capability of the battery system in order to let the battery assisted solar pumping system...
The paper deals with an extensive experimental analysis of failures in ac motor drives exploiting a Hardware In the Loop (HIL) implementation. As many types of faults lead to stop the drive operation, a suitable approach for the realization of an appropriate test bench consists in the replacement of some hardware with an embedded system based on a FPGA board and high level graphical programming language...
Electrochemical batteries play a key role in electrical and electronics devices such are laptops, cellphones, electric cars, etc. Battery packs in devices having higher power are still too much expensive for wide applications. To achieve an effective exploitation of battery packs it is important to have a robust and reliable battery management. Accurate State of Charge estimation in battery management...
An over-voltage mitigation technique for open-end winding electrical drives with long power cables is proposed in this paper. In particular, a suitable dwell time is included in the switching patterns of the two inverters to minimize the over-voltage occurring at the stator terminals of this kind of systems. No passive RLC networks are required, thus avoiding additional costs and extra power losses...
The paper deals with an application of the planar magnetic technology addressing EMI filters for power electronic converters. FEA investigation and experimental measures have been performed on inductor prototypes to explore the possible advantages when employed in EMI Filtering on high switching frequency power converter. Preliminary evaluations show better overall energy efficiency and some design...
The paper presents a study of an Integrated Multi-Drive (IMD) system, obtained by redesigning the stator winding of a standard electrical machine to derive a combination of several Sub-Machines (SMs). A single SM consists of an independent three-phase stator winding set sharing a common magnetic circuit including the rotor with the other SMs. Exploiting independent vector control for each SMs, the...
In open-end winding AC motor drives, terminals of stator phases are normally connected between two inverters, normally, of the same type and size. In the present paper, an alternative configuration is studied where the machine is supplied exploiting two different converters: a main multi-level inverter and an auxiliary two-level inverter. The last operates as active power filter in order to eliminate...
Accurate modeling of electrochemical batteries is of major concern in designing the control system of Energy Storage Systems (ESS). In particular, a precise estimation of State of Charge (SOC) and State of Health (SOH) parameters strongly affects the full exploitation of battery energy potential in real applications. In this paper a novel real-time estimation method is presented representing a good...
Among single stage, single phase, inverter configurations the Neutral Point Clamped topology is advantaged by its quiet rail switching mechanism, producing negligible common mode currents. However, it requires a double input voltage if compared with a classic full bridge inverter. A modified Neutral Point Clamped, three level, single phase, inverter topology is presented in this paper intended for...
Thanks to an inner redundancy, AC Multi-Drives can be made fault tolerant with minor modifications of their structure. However, some additional components are generally required in order to create emergency current paths in case of a fault. According to a recently presented approach the amount of additional components can be reduced by exploiting healthy drives to support faulty drives. In this case...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.