Electromagnetic actuator
一种电磁致动器、电磁铁的技术，应用在电动组件、磁路、电气元件等方向，能够解决不能提高步进电机转矩等问题，达到提高转矩的效果
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Embodiment 1
[0067] figure 1 and figure 2 A stepping motor 1 according to a first embodiment of the present invention is shown. The stepping motor 1 has: two sets of stators 10, 20; a rotor 30; auxiliary stators and auxiliary yokes 40, 50 formed of soft magnetic materials.
[0068] The rotor 30 generally has a disc shape and an annular plate shape. On the peripheral surface 31, ten magnetic poles are formed at substantially equal intervals in the radial direction by magnetized permanent magnet structures. figure 2 In the region Nr 1 ~Nr 5 (Denoted by the symbol Nr when there is no distinction or collectively) is magnetized into the N pole, while the rest of the area Sr 1 ~Sr 5 (Denoted by the symbol Sr when there is no distinction or collectively), the surrounding surface is magnetized into an S pole. However, figure 2 The purpose of the schematic diagram is to show in an easy-to-understand manner that the N and S magnetic poles appear at substantially equal intervals on the per...
Embodiment 2
[0150] In addition, as long as the parts of the auxiliary yokes 40 and 50 facing both the different magnetic pole parts Nr and Sr of the rotor 30 are substantially magnetostatically coupled, instead of having the same wall thickness along the circumferential direction A, Figure 6A and Figure 6B As shown, thin-walled portions 43 and 53 having grooves and cutouts are provided in the middle of both end portions 41 , 42 and 51 , 52 in the circumferential direction A, respectively. can also be as Figure 6C and Figure 6D As shown, openings 44 and 54 are formed in the middle part of the circumferential direction A, and the two end parts 41, 42 and 51, 52. Thus, by forming the grooves, cutouts and openings 44, 45 in the auxiliary yokes 40, 50, the weight of the stepping motor 1 can be reduced.
Embodiment 3
[0152] In the above, the example in which the rotor 30 has ten magnetic poles has been described, but the number of poles of the rotor 30 may be more or less than this number.
[0153] Next, based on Figure 7 and Figure 8 , to illustrate the motor 1a in which the rotor is equipped with 12 poles at equiangular intervals. Figure 7 and Figure 8 In motor 1a, pair with figure 1 Components and elements that are the same as those of the motor 1 shown in FIG. 6 are assigned the same symbols, and for different components and elements, an "a" is added after the symbols.
[0154] The rotor 30 a has the same configuration as the rotor 30 except that the number of magnetic poles is twelve. That is, the rotor 30a has: 6 N poles Nr 1 ~Nr 6 (Denoted by the symbol Nr when no distinction is made or when collectively referred to); 6 S poles Sr 1 ~Sr 6 (Denoted by symbol Sr when no distinction is made or collectively referred to), the spread angle α of each magnetic pole is 30 degrees...
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