Eddy current slip coupling pdf

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The PMEC transmission is based on the Faraday, the copper rotor cuts the magnetic field produced by the PMs, and then alternating eddy current should give off alternating magnetic field. The coupling of eddy current magnetic field and the PMs produces magnetic thrust and magnetic pull, which realizes the shafting power transmission. S. An eddy current coupling (11) includes a housing (13, 15, 17), a rotor (29), an inductor drum means (25), coil means (41) for electro-magnetically coupling the rotor member and the inductor drum means and a slip ring assembly (45) for energizing the coil. The slip ring assembly includes a first support member (55) connected to the rotor member for rotation therewith, slip ring means (47, 49 In this paper the possibility of using an eddy-current slip coupling to remove cogging torque and torque ripple in a slip-synchronous permanent magnet wind generator is investigated. It is shown that 2D finite element methods are inaccurate compared to 3D finite element methods when solving eddy currents in eddy-current couplings. Two topologies of eddy-current couplings are optimised and For simplification of the analysis, the main assumptions are as follow. 1)The permanent magnet couplers operate in the steady state with constant slip speed, and the slip speed is limited between 40 an eddy current coupling as defined in claim 1 wherein said sealed chamber includes an inner surface on the outer periphery thereof which is sloped in a radially outward direction and which communicates with said passageway means, said inner surface accumulating debris thereon which are directed in a radially outwardly direction along said sloped … First, known eddy current coupling devices have driven members made of magnetic materials such as cast iron. Therefore, the driven members have, not only high torque, but also high inertia. Because AXIAL-FIELD EDDY-CURRENT COUPLING 5 3.2.2. Magnetic scalar potential (h e,φ) formulation Thanks to divj= 0, a source field h e producing eddy currents in conductors can be defined by: j e = curlh e (7) Then, introducing the magneticscalar potential φ, the magnetic field hbecomes: h= h e −gradφ (8) Liquid Cooled Eddy Current Clutches — Models WCS-215 through WCS-2253 200 through 2,000 HP ac power to dc to energize the field coil Dynamatic® heavy duty Eddy Current clutches provide stepless adjustable speed with full load torque, continu-ously available, over a wide speed range. Standard ratings are included in the table below. Units with capaci-ties up to 2,000 HP at 1200 rpm have been Eddy Current. Rotating Scanners . Rotating Scanners . The following five Eddy Current rotating scanners are available: MiniMite, Spitfire 2000, RA-2000, PS-5AL and PS-4. All scanners work with the Nortec 2000S series, Nortec WorkStation and PowerStation. Download Brochure (pdf, 245kb) RA2000. 600 to 2400 RPM variable speed right angle handheld rotating Eddy Current Scanner. Speed range: Nortec a conductive disk or ring, in which eddy-currents are induced. These couplings operate on the principle of slip, where more eddy-currents are induced with an increase in speed, which m