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 presents a fault-tolerant converter intended for AC regenerative drives requiring improved reliability and availability. The standard six-switch three-phase converter is rearranged in order to obtain a four-switch tree-phase converter (FSTPC) during post-fault operation. Thus, its performance relies heavily on the fault diagnostic technique to trigger the remedial procedures, and on the...
Fault diagnosis is a mandatory feature in fault tolerant systems, since it provides the information necessary for the fault isolation and system reconfiguration. Recently, permanent magnet synchronous generator (PMSG) drives have achieved prominence in wind energy conversion systems (WECS), due to their reliability and availability. Therefore, in this paper a new approach is proposed for current sensor...
This paper presents a variable speed ac drive based on a permanent magnet synchronous motor, supplied by a three-phase fault-tolerant power converter. With the aim to develop a fully automated fault-tolerant drive, special control routines were incorporated into the drive main controller that allow the control system to accomplish four important tasks, namely inverter fault diagnosis, faulty leg isolation,...
Among the multilevel converter topologies the cascaded H-bridge converter (MCHBC) differs from other topologies by having series connections of several power cells, producing a better voltage quality and higher voltage output range, and using the same voltage power supply levels. This characteristic adds several benefits as it allows a modular system, the use of low voltage power supplies, and output...
This paper presents a variable speed ac drive based on a permanent magnet synchronous motor, supplied by a three-phase fault-tolerant power converter. In order to achieve this, beyond the main routines, the control system integrates a reliable and simple algorithm for real-time diagnostics of inverter open-circuit faults. This algorithm performs an important role since it is able to detect an inverter...
This paper presents a new fault diagnostic technique applied to switched reluctance motor (SRM) drives. A fault is detected when the measured amplitude of the DC bus current differs from its expected amplitude, assuming normal operating conditions. The information about phase currents amplitudes and the control states of all power switches permit to easily estimate the amplitude of the power converter...
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.