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The paper considers the solving of the applied task of developing electric machines, particularly, designing of brushless synchronous magneto-electric machine. The need in electric machines, where the electromagnetic field excitation occurs because of using hard permanent magnets, is growing constantly which follows the creation of modern permanent magnets on the basis of neodymium alloys (NdFeB)...
This paper presents a novel configuration of the permanent magnet system for rotating magnetic refrigerator, which consists of stator and rotor. The stator of this system includes two permanent magnets and iron yoke. The rotor includes shaft, iron core and magnetic refrigerant material. When the magnetic refrigerant material is located under the pole of the permanent magnet, it is magnetized by a...
This paper presents a generic design concept of three degree-of-freedom (3-DOF) permanent-magnet (PM) spherical actuators. A ball-shaped rotor mounted with multiple layers of PM poles is concentrically housed in a spherical-shell-like stator with multiple layers of air-core coils. This design allows more rotor and stator poles to be incorporated to increase torque output and motion range of the actuator...
A new structure is set forth for the interior composite-rotor controllable-flux permanent magnet synchronous machine (PMSM). NdFeB permanent magnet(PM), which has high remanent flux density as well as high coercive force, and AlNiCo PM, which has high remanent flux density but low high coercive force, are used in this structure. The magnetization intensity and direction of AlNiCo PM can be controlled...
In order to implement an aviation or aerospace brushless DC machine servo control system in a high-temperature hostile environment, a novel electromagnetic rotor position sensor was designed. Concentrated excitation coils were symmetrically mounted at the middle of the stator inner circumference notches and the pickup ones were wound around the stator teeth. The rotor outer circumference was cut to...
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