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.
The use of permanent magnets offers freedom in machine design and the highest possible efficiencies for wind power machines. Although full power converters must be used with permanent magnet machines, these converters make it possible to fulfill even the strictest grid codes. If appropriate care is taken in selecting the exact magnetic material composition, Neodymium-Iron-Boron magnets are compatible...
Low cost and low cogging torque are the most important aspects in the design of direct drive PM wind generators. In this paper a low cost PM wind generator with an irregular, parallel slotted stator is analysed with respect to cogging torque. The sensitivity of average torque and cogging torque to machine dimension variations are investigated. From this a method is proposed whereby regions of low...
In this paper, a permanent magnet brushless machine for wind power with novel concentrated windings, is introduced, in which the special combination of stator slots/rotor poles is employed, resulting in high power density and low cogging torque. The distinct topology and operation principle are analyzed by using a 3-phase 24/22-pole prototyped machine as an example. Based on finite element method,...
This paper proposes a new outer-rotor permanent-magnet (PM) vernier machine for direct-drive wind power generation, which can offer low-speed operation to directly capture wind power, and enable high-speed rotating field design to maximize the power density. Compared with its mechanical gear counterpart, the proposed machine can eliminate the mechanical wear and tear as well as gear transmission loss,...
This paper presents generators models for rural electrification systems, fed from renewable energy. A brief introduction on wind energy and biomass system is shown, followed by dynamic modeling of three phase induction generator, single phase induction generators and Permanent Magnet generator. The aim of this research is to propose optimal electrification system design for rural areas, which are...
An 5 kVA axial flux permanent magnet synchronous generator(AFPMSG), designed to operate in a small-scale wind-power applications, is described in this paper. The stator of the machine is realized by using SMC to form teeth combined with a strip punched laminated core and concentrated winding. Such a novel generator structure is simple to construct and its performance is good. It offers sinusoidal...
A novel wind energy system is proposed and studied in this paper. An axial-flux permanent-magnet synchronous generator (AFPMSG) is directly coupled to a vertical-axis wind turbine (VAWT), which can be an H-Darrieus, Savonius, Hunt turbine, or others. The AFPMSG has an outer-rotor construction for convenient mounting to the turbine rotor structure. The coreless armature winding design eliminates cogging...
This paper aims to the disadvantage of high adjustment rate and many ripples for PM synchronous generator in wind power generation system, presents a newly brushless dc wind generator, whose rotor adopts tangential structure and Ferrite material in permanent magnet to increase flux, and the stator is composed of Single-wave winding structure connected polyphase full wave non-controlled rectification...
In order to overcome the problems such as heavy distortion of winding current, low power factor and high cost of DC inductor met in the traditional rectified permanent magnet (PM) wind generation system, a circuit of cascaded single phase power factor correction (PFC) rectifier pair is proposed and discussed. In the new scheme, proper designed armature inductor of the generator is used as boost inductor,...
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.