TWI723609B - Stepper motor - Google Patents

Abstract

The present invention provides a stepper motor, which comprising a primary side, a secondary side and a guiding structure, wherein the primary side is opposite to and adjacent to the secondary side, and the primary side is mainly composed of two magnetic field units laterally adjacent. Each of the magnetic field units is disposed in an arc shape, and the magnetic field unit mainly comprises an excitation winding and a permanent magnet, and the secondary side is composed of a material that can be temporarily magnetized. The magnetic field unit forms a first magnetic pole surface opposite to the secondary side, and the first magnetic pole surface forms a circular arc shape. The secondary side forms a second magnetic pole surface opposite to the first magnetic pole surface, and the second magnetic pole surface cooperates with the first magnetic pole surface in a circular arc shape. The permanent magnet is disposed on the primary side to form an overall innovative spatial pattern, thereby achieving the advantages and practical advancement of the overall composing simplification.

Description

Stepping motor

The present invention relates to a stepping motor; in particular, it refers to an innovative structure type revealer of a stepping motor.

The stepping motor is mainly composed of a primary side and a secondary side opposed to each other, wherein the primary side is provided with an excitation winding for generating a magnetic field, the secondary side is provided with a magnet relative to the excitation winding, and the primary side and the The secondary side is respectively provided with convex teeth, the electric current passes through the excitation winding to form a magnetic field, and the change of magnetic conduction between the convex teeth on the primary side and the secondary side makes the primary side and the secondary side move relative to each other.

Therefore, in view of the above-mentioned problems of the conventional stepping motor technology, how to develop an innovative structure that can be more ideal and practical is really awaiting the relevant industry to think about the goal and direction of the breakthrough; in view of this, the invention With many years of experience in manufacturing, development and design of related products, human-centered people, after detailed design and careful evaluation for the above goals, finally came up with a practical invention.

The main purpose of the present invention is to provide a stepping motor, and the technical problem to be solved is to think about and make innovation breakthroughs for the goal of developing a new type of stepping motor that is more ideal and practical.

Based on the foregoing objectives, the technical feature of the present invention to solve the problem is mainly that the stepping motor includes a primary side, a secondary side, and a guiding structure, wherein the primary side is opposite to and adjacent to the secondary side, and the guiding The moving structure maintains the relative structure of the primary side and the secondary side in space, and guides the direction of relative movement of the primary side and the secondary side;

The primary side is mainly composed of two magnetic field units adjacent to each other sideways, each of the magnetic field units is arranged in an arc shape, and a gap is formed between each of the magnetic field units;

The magnetic field unit mainly includes an excitation winding and a permanent magnet, and each of the excitation windings is mainly composed of a coil winding arranged on two adjacent positioning frames in the lateral direction. Each positioning frame is made of silicon steel. The magnet is clamped between the positioning frames;

The secondary side is made of materials that can be temporarily magnetized;

The positioning frame forms a first magnetic pole surface opposite to the secondary side, the first magnetic pole surface is in a circular arc shape, the positioning frame forms a plurality of first convex teeth on the first magnetic pole surface, and a plurality of first tooth grooves are respectively formed Between the adjacent first convex teeth;

The secondary side forms a second magnetic pole surface opposite to the first magnetic pole surface, the second magnetic pole surface matches the first magnetic pole surface in a circular arc shape, and the second magnetic pole surface is recessed in a number of second tooth grooves, so that a number of The second convex teeth are respectively formed between the second tooth grooves.

The permanent magnet of the present invention is arranged on the primary side to form an overall innovative space type, thereby achieving the advantages of simplified overall structure and practical advancement.

Please refer to the several feasible embodiments of the stepping motor of the present invention shown in each figure, but these embodiments are for illustrative purposes only, and are not limited by this structure in the patent application.

As shown in Figures 1 to 5, the first embodiment of the present invention includes a primary side 10, a secondary side 20, and a guiding structure 40, wherein the primary side 10 and the secondary side 20 are opposite and adjacent to each other The guiding structure 40 is used to maintain the relative structure of the primary side 10 and the secondary side 20 in space, and guide the direction in which the primary side 10 and the secondary side 20 act relative to each other.

The primary side 10 is mainly composed of two magnetic field units 11 adjacent to each other sideways, each of the magnetic field units 11 is arranged in an arc shape, and a gap 12 is formed between each of the magnetic field units 11, and the magnetic field unit 11 mainly includes an excitation winding 13 And a permanent magnet 14, wherein each of the field windings 13 is mainly composed of a coil winding 132 wound around two adjacent positioning frames 134, each of the positioning frames 134 is made of silicon steel, and the permanent magnets 14 are sandwiched Between each of the positioning frames 134, the positioning frame 134 forms a first magnetic pole surface 15 opposite to the secondary side 20, the first magnetic pole surface 15 is in the shape of an arc, and the positioning frame 134 is formed on the first magnetic pole surface 15 A plurality of first convex teeth 154, a plurality of first tooth grooves 152 are respectively formed between adjacent first convex teeth 154, and the surface of each first convex tooth 154 adjacent to the secondary side 20 constitutes the first Magnetic pole face 15.

The secondary side 20 is made of iron or other materials that can be temporarily magnetized. The secondary side 20 forms a second magnetic pole surface 22 opposite to the first magnetic pole surface 15, and the second magnetic pole surface 22 matches the first magnetic pole. The surface 15 is in the shape of a circular arc, and the second magnetic pole surface 22 is recessed in a plurality of second tooth grooves 222, so that a plurality of second convex teeth 224 are respectively formed between the second tooth grooves 222, and each second convex tooth The surface of 224 adjacent to the primary side 10 constitutes the second magnetic pole surface 22.

The overall innovative spatial form of the stepping motor of the present invention, combined with the permanent magnet 14 arranged on the primary side 10, the overall structure is simplified. When current passes through any one of the coil windings 132, the coil winding 132 generates a magnetic field. Each of the permanent magnets 14 also generates a magnetic field. Under the action of the magnetic field, the magnetic conduction between each of the first convex teeth 154 and each of the second convex teeth 224 that are adjacent to each other changes, so that the secondary side 20 is relative to the primary Side 10 displacement.

When the current does not pass through each of the coil windings 132, each of the coil windings 132 will not generate a magnetic field. At this time, the magnetic field generated by the permanent magnet 14 causes each of the permanent magnets 14 and the secondary side 20 to form a magnetic attraction. The primary side 10 and the secondary side 20 are positioned relative to each other. The primary side 10 and the secondary side 20 will not easily move relative to each other due to gravity or other external forces. As a result, When the current supply to each of the excitation windings 13 is interrupted due to equipment shutdown or other reasons, the relative positioning between the primary side 10 and the secondary side 20 is not easily lost due to the influence of external forces. The primary side 10 and the secondary side 20 is not easy to produce unexpected relative movement. If you want to start the stepper motor again, when supplying current to the field winding 13, there is no need to perform the adjustment of the mutual positioning of the primary side 10 and the secondary side 20, just a stepper motor. Enter working mode.

Furthermore, when the current does not pass through each of the coil windings 132, the primary side 10 and the secondary side 20 can still be maintained in relative positioning by the permanent magnet 14. During the execution of the stepping motor, if necessary, If the operation is suspended for a long time, the current supply to each field winding 13 can be directly interrupted as the case may be, thereby reducing power consumption.

Furthermore, the guiding structure 40 is a sliding rail structure, the primary side 10 is disposed on the base 30, the guiding structure 40 is disposed on the base 30 and the secondary side 20, and the base 30 forms a housing Slot 32, the primary side 10 is disposed inside the accommodating slot 32, the accommodating slot 32 opens toward the secondary side 20 to form a first notch 34, and accordingly, the primary side 10 is disposed in the accommodating slot At 32 o'clock, a magnetic field unit 11 can be inserted into the accommodating slot 32 through the first slot 34 first, and the magnetic field unit 11 can be moved to one side of the accommodating slot 32, and then another magnetic field unit 11 The accommodating groove 32 is inserted into the accommodating groove 32 through the first notch 34 and moved toward the other side of the accommodating groove 32, so that the gap 12 is formed between the magnetic field units 11.

With the formation of the gap 12, after one magnetic field unit 11 is inserted into the accommodating slot 32 through the first slot 34, another magnetic field unit 11 can still be inserted into the accommodating slot 32 through the first slot 34.

In addition, the arcs of the first convex tooth 154 and the second convex tooth 224 are the same, the arcs of the first tooth grooves 152 are the same, the arcs of the second tooth grooves 222 are the same, and the first tooth grooves 152 have the same arc. Different from the curvature of the second tooth groove 222, the distance between each first convex tooth 154 and each adjacent second convex tooth 224 is changed accordingly.

The secondary side 20 forms a planar bearing surface 24 opposite to the second magnetic pole surface 22. The bearing surface 24 is used for bearing and setting various objects. As shown in FIG. 5, the primary side 10 is made to be along the second magnetic pole surface. The radial thickness of a magnetic pole surface 15 is T1, the secondary side 20 is between the second magnetic pole surface 22 and the bearing surface 24, and the radial thickness along the second magnetic pole surface 22 is T2, and T2≧0.6 T1, according to this, avoid the phenomenon of magnetic field narrowing in the range of the secondary side 20.

As shown in Fig. 6, the second embodiment is mainly different from the first embodiment in that the seat body 30 is further expanded to form a side of the accommodating groove 32 along the arc extending direction of the first magnetic pole surface 15. A flaring 35 is formed, and an obtuse angle is formed between the side wall 352 of the flaring 35 in the direction away from the primary side 10 and the arc extending direction of the first magnetic pole surface 15.

As shown in the first embodiment, if the gap 12 is relatively narrow, since each of the magnetic field units 11 is fan-shaped, after a magnetic field unit 11 is inserted into the accommodating groove 32 through the first notch 34, the first notch 34 Subtracting the remaining width of the magnetic field unit 11 that has been inserted, it may not be enough to provide another magnetic field unit 11 to pass through the outer part of the sector; accordingly, the second embodiment is provided in the accommodating groove 32 on the primary side 10 If the gap 12 is relatively narrow, after a magnetic field unit 11 is inserted into the accommodating groove 32 through the first slot 34, and formed by the flaring 35, another magnetic field unit 11 can still pass through the first slot. 34 is placed in the accommodating groove 32.

As shown in Fig. 7, the third embodiment is mainly different from the first embodiment in that the accommodating groove 32 forms a second notch 36 on one side, and the primary side 10 is disposed in the second notch 36 through the second notch 36. According to this, when the primary side 10 is disposed in the accommodating groove 32, each of the magnetic field units 11 can enter the accommodating groove 32 through the second slot 36 at the same time, so that the primary side 10 groups can be increased The convenience of being installed in the base 30.

As shown in Figure 8, the fourth embodiment is mainly different from the first embodiment in that the fourth embodiment includes a plurality of the primary side 10 and one of the secondary side 20, wherein each of the primary sides 10 are adjacent to each other sideways in sequence The secondary side 20 is a ring-shaped body, and the secondary side 20 is provided on the ring-shaped inner edge of each primary side 10.

In the fourth embodiment, the annular center of the secondary side 20 can be pivotally connected to a shaft (not shown in the figure) to drive the shaft to rotate. The fourth embodiment can also use the secondary side 20 as a carrier to provide Various types of clamps or objects are arranged on the secondary side 20, so that the clamps or objects rotate.

The fourth embodiment can be further changed to the fifth embodiment, which is not shown in the drawings. The fifth embodiment is mainly different from the fourth embodiment in that the secondary side is provided on the annular outer edge of each primary side.

10: Primary side 11: Magnetic field unit 12: Gap 13: Field winding 132: Coil winding 134: Positioning frame 14: Permanent magnet 15: The first magnetic pole face 152: first tooth groove 154: The first convex tooth 20: Secondary side 22: The second magnetic pole face 222: second tooth groove 224: The second convex tooth 24: Bearing surface 30: Seat 32: containing tank 34: The first notch 35: Flaring 352: Side wall 36: The second notch 40: Guiding structure T1: Thickness T2: Thickness 4: Part of the first magnetic pole face and the second magnetic pole face are enlarged and shown in Figure 4

Figure 1 is a perspective view of the first embodiment of the present invention. Figure 2 is a three-dimensional exploded view of the first embodiment of the present invention. Figure 3 is a cross-sectional view of the first embodiment of the present invention. Figure 4 is a partial enlarged view of Figure 3. Figure 5 is a schematic front view of the primary side and the secondary side of the first embodiment of the present invention, showing the thickness relationship between the primary side and the secondary side. Figure 6 is a schematic cross-sectional view of the second embodiment of the present invention Figure 7 is a perspective view of the third embodiment of the present invention. Figure 8 is a front view of the fourth embodiment of the present invention.

10: Primary side

11: Magnetic field unit

12: gap

13: Excitation winding

132: Coil winding

134: positioning frame

14: Permanent magnet

15: The first magnetic pole face

20: secondary side

22: The second magnetic pole face

24: bearing surface

30: seat body

32: accommodating slot

34: The first notch

40: Leading structure

Claims (10)

A stepping motor includes a primary side, a secondary side, and a guiding structure, wherein the primary side is opposite to and adjacent to the secondary side, and the guiding structure maintains the primary side and the secondary side in space Relatively constitute, and guide the direction of the relative action of the primary side and the secondary side; the primary side is mainly composed of two magnetic field units adjacent to the side, each of the magnetic field units are arranged in an arc shape, and the magnetic field units are formed between A gap; the magnetic field unit mainly includes an excitation winding and a permanent magnet, and each of the excitation windings is mainly composed of a coil winding arranged on two adjacent positioning frames in the lateral direction, and each positioning frame is composed of silicon steel , The permanent magnet is sandwiched between the positioning frames; the secondary side is made of temporarily magnetizable material; the positioning frame forms a first magnetic pole surface opposite to the secondary side, and the first magnetic pole surface is In an arc shape, the positioning frame forms a plurality of first convex teeth on the first magnetic pole surface, and a plurality of first tooth grooves are respectively formed between adjacent first convex teeth; the secondary side forms a second magnetic pole surface Opposite to the first magnetic pole surface, the second magnetic pole surface cooperates with the first magnetic pole surface to form a circular arc shape, and the second magnetic pole surface is recessed in a plurality of second tooth grooves, so that a plurality of second convex teeth are respectively formed in each of the Between the second tooth groove. The stepping motor according to claim 1, wherein the primary side is arranged on a base body, the guiding structure is arranged on the base body and the secondary side, the base body forms an accommodating groove, and the primary side is arranged on the Inside the accommodating tank. The stepping motor according to claim 2, wherein the accommodating groove opens toward the secondary side to form a first groove mouth. The stepping motor according to claim 3, wherein the seat body is further expanded to form a flaring on one side of the accommodating groove along the arc extending direction of the first magnetic pole surface, and the flaring is away from the primary side direction An obtuse angle is formed between the sidewalls of and the arc extending direction of the first magnetic pole surface. The stepping motor according to claim 2, wherein the accommodating groove forms a second notch on one side, and the primary side is disposed in the accommodating groove through the second notch. The stepping motor according to claim 1, wherein the arc of the first convex tooth and the second convex tooth are the same. The stepping motor according to any one of claim 1 to claim 6, wherein the secondary side forms a planar bearing surface opposite to the second magnetic pole surface. The stepping motor according to claim 7, wherein the thickness of the primary side along the radial direction of the first magnetic pole surface is T1, and the secondary side is between the second magnetic pole surface and the bearing surface along the first magnetic pole surface. The radial thickness of the two magnetic pole faces is T2, and T2≧0.6 T1. For example, the stepping motor described in any one of claim 1 to claim 6 includes a plurality of the primary sides, wherein each of the primary sides is adjacent to each other side in sequence and is arranged in a ring shape, and the secondary side is a ring Shaped body, and the secondary side is provided on the annular inner edge of each primary side. For example, the stepping motor described in any one of claim 1 to claim 6 includes a plurality of the primary sides, wherein each of the primary sides is adjacent to each other side in sequence and is arranged in a ring shape, and the secondary side is a ring Shaped body, and the secondary side is provided on the annular outer edge of each primary side.

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