What are the advantages of sintered nd-fe-b permanent magnet rings for radiation-oriented motors? We provide high performance series sintered nd-fe-b magnets with radiation-oriented rings. The figure is the FEM analysis result of the 16-pole magnetized radiation-oriented ring. Obviously, radiation-oriented rings have the following advantages compared with the rings formed by splicing 16 tile permanent magnets with a single orientation:
(1) the magnetic flux vector of radiation-oriented ring is completely radial, with no tangential magnetic flux component.Therefore, the air-gap magnetic field of a motor made with a radiation-oriented ring with the same remanent magnetism is much higher than that of a motor made with multiple tile permanent magnets with a single orientation.
(2) since the air gap magnetic field of the motor made by the radiation-oriented ring has no tangential flux component, the stray magnetic field is almost zero, which brings benefits to the waveform control of the output characteristics of the permanent magnet motor, as well as the control of the motor's heating, noise, vibration and other harmful indicators.
(3) the radiation-oriented ring has neither the splicing gap like the ring formed by the splicing of several tile permanent magnets with a single orientation, nor the uneven magnetic moment caused by geometric geometric tolerance of several tile permanent magnets with a single orientation. The air gap magnetic field uniformity of the motor is very high.
(4) the installation of radiation-oriented ring is simple, the installation and positioning accuracy is high, the installation error rate is low, and the large amount of automatic assembly is easy to be realized. Therefore, the manufacturing process cost, quality cost and management cost of permanent magnet motor can be significantly reduced.