Magnet ring structure and permanent magnetic synchronous motor using same
A magnetic ring and permanent magnet material technology, applied in the shape/style/structure of the magnetic circuit, rotating parts of the magnetic circuit, etc., can solve the problems of increasing the core loss, serious waveform distortion, reducing the motor control accuracy, etc., to improve the overall performance. , the effect of eliminating high-order harmonics
Active Publication Date: 2014-07-30
湖北立锐机电有限公司
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Problems solved by technology
Obviously, the air-gap magnetic flux density waveform is poor in sinusoidality, the waveform distortion is serious, and it contains relatively rich high-order harmonics
In addition, it also reduces the control accuracy of the motor, resulting in a decrease in the overall performance of the motor
Method used
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Embodiment Construction
[0029] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the permanent magnet synchronous motor according to the embodiments of the present invention will be specifically described below with reference to the accompanying drawings, and the embodiments of the present invention are not limited to the following exemplary embodiments.
[0030] According to an embodiment of the present invention, the magnetic ring has Figure 4 and Figure 5 There are two parts of material shown in : viscous filler 5 and permanent magnetic material 6 .
[0031] The number of magnetic poles of the permanent magnet synchronous motor is set as M, and the number of stator slots is N. Both the reference example and the embodiment have the number of magnetic poles M=10 and N=12. The mechanical angle of space occupied by each pole:
[0032] Suppose the mechanical angle of the magnetic ring magnetic pole magnetization part of the ...
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The invention provides a magnet ring structure and a permanent magnetic synchronous motor using the magnet ring structure. The magnet ring structure comprises sticky fillings, permanent material and magnetic poles. The magnetic ring structure is characterized in that the upper surfaces of the magnetic poles of the magnet ring are in a circular arc shape, the lower surfaces of the magnetic poles of the magnet ring are round, the sticky fillings are arranged between the two poles, and the magnet ring structure is integrally annular; the non-magnetization permanent material is arranged between the adjacent magnetic poles of the magnet ring, and the minimum thickness positions of the two adjacent magnetic poles are connected to form a straight line. The magnet ring structure is designed for generating an air-gap magnetic field distributed in an approximate-sine shape, higher harmonic is reduced or eliminated, and overall performance of the motor is improved.
Description
technical field [0001] The invention relates to a permanent magnet synchronous motor, more particularly to a magnetic ring structure with an optimized shape and a permanent magnet synchronous motor using the same. Background technique [0002] In order to generate a higher-strength air-gap magnetic field, permanent magnet synchronous motors generally use rare-earth permanent magnet materials with higher performance. For permanent magnet synchronous motors with small power and small volume, multi-pole annular permanent magnets, that is, magnetic rings, are generally used as excitation permanent magnets. A multi-pole ring permanent magnet refers to a magnet filled with multiple pairs (≥2) of magnetic poles on the outer or inner circumference of the ring. figure 1 Shown is one of the most common radially magnetized magnetic rings with 5 pairs of poles, which is characterized by circular inner and outer surfaces, concentric circles, and uniform thickness of the rings. The corr...
Claims
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Inventor 任武许强刘缵阁
Owner 湖北立锐机电有限公司