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 reduced switch count multipulse rectifier with medium-frequency (MF) transformer isolation. The proposed topology consists of a three-phase push–pull based ac to dc rectifier with a MF ac link employing two active switches. A three-phase, five-limb, multiwinding MF transformer is employed for isolation. The secondary side of the transformer is connected in a zig-zag configuration...
The brushless doubly-fed generator (BDFG) has the advantages of brushless structure, variable-speed constant-frequency operation, flexibly controllable active and reactive powers, low converter capacity and cost, and so on, which is very suitable for the wind power generation, especially the large wind turbines and offshore wind farm [1].
Power converter open-circuit fault leads to reduction of motor output performance. Fault-tolerant control strategy, which is applied to power converter of four-phase doubly salient electro-magnetic motor (DSEM) drive, is investigated in this paper to improve the post-fault motor performance. A fault-tolerant topology is newly presented. It has the advantage of simple structure with only two bidirectional...
Due to the flybacks' indirect characteristic of energy transfer, the transformer size increases for high power levels. Providing an additional direct energy transfer path can decrease its size. Parallel forward-flyback converters offer such functionality and outperform forward converters with regard to PFC functionality. A balanced forward-flyback converter is a variation on this kind of parallel...
This paper presents a reduced active switch count push-pull based DC fast charger for electric vehicles. The proposed system takes a 3-phase utility line voltage and produces a high frequency (HF) AC link employing only two active switches. A 5-limb HF transformer, in zig-zag connection, is employed for isolation. The primary side of the transformer is connected to a clamp circuit and two active semiconductor...
This paper presents a new adjustable speed drive (ASD) topology that employs medium frequency (MF) transformer isolation. The proposed system consists of a new 3-phase push-pull based AC to DC rectifier with a MF AC link employing only two active switches. A single 5-limb multi-winding MF transformer is employed for isolation. The secondary side of the transformer is connected in a zig-zag configuration...
Major concerns in the converter design are the efficiency and the power density. In this paper is presented a comparison of six modular power converter solutions based on single-phase link for offshore wind turbines with permanent magnet synchronous generator. The scheme of the converter module considered is based on three stages: 3AC-AC converter, a single-phase high-frequency transformer and a full-bridge...
High amount of direct current is essential in many industrial processes. Conventional methods for obtaining high amount of direct current involve parallel operation of converters with interphase or five-legged rectifier transformer. The interphase transformer (IPT) and/or rectifier transformer employed in the system increase overall size of the system and also provide limited control over the operation...
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.