A stator structure for a parallel motor model

Abstract

This invention provides a stator structure for a parallel motor model, including at least one pair of magnets consisting of a first magnet and a second magnet, and at least one pair of conductive rings consisting of a positive conductive ring and a negative conductive ring. The N pole of the first magnet faces the rotor to act on the energized coil, and the S pole of the second magnet faces the rotor to act on the energized coil. The positive conductive ring is used to connect to the positive terminal, and the negative conductive ring is used to connect to the negative terminal. The side of the conductive ring facing the rotation axis has an arc-shaped contact surface for direct or indirect sliding contact with the terminals connected to the coil to supply power to the coil. This invention eliminates brushes and commutators, and uses conductive rings to supply power instead of brushes. The coil can be energized and commutated by directly sliding contacting the arc-shaped contact surface of the conductive ring. This allows all coils to be connected in parallel, enabling all coils to operate continuously, and eliminating the problem of alternating energization regardless of the number of coils.

Description

Technical Field

[0001] This invention belongs to the field of motor technology, and in particular relates to a stator structure for a parallel motor model. Background Technology

[0002] Motors include brushed motors and brushless motors. Brushed motors are widely used in some less demanding applications due to their stable performance and low cost.

[0003] Traditional brushed motors mainly consist of a housing, stator, and rotor. The stator includes magnets and brushes, while the rotor includes coils and a commutator. The coils are connected to commutator segments and rotate with the commutator. Commutation of the coils is achieved by switching the commutator segments that the brushes contact. Because continuous rotation of the shaft cannot be guaranteed with only one set of coils, current motors use a multi-coil configuration. Figure 1 and Figure 2 As shown, a typical three-coil motor currently operates with each group of coils sharing a common contact point with adjacent coils via a commutator segment 4. During rotor rotation, positive and negative brushes 5 alternately contact the three commutator segments 4 to achieve commutation. It can be seen that currently, during rotor rotation, there is one set of parallel circuits, while the remaining circuits are either open-circuited or connected in series with other coils, making it impossible to achieve parallel connection of all coils. As the number of coils increases, the energizing time of each group of coils decreases accordingly, requiring the commutator to allocate the energizing time of each group, thus preventing full-time operation. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a stator structure for a parallel motor model.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A stator structure for a parallel motor model includes at least one pair of magnets consisting of a first magnet and a second magnet, and at least one pair of conductive rings consisting of a positive conductive ring and a negative conductive ring. The N pole of the first magnet faces the rotor to act on an energized coil, and the S pole of the second magnet faces the rotor to act on an energized coil. The positive conductive ring is used to connect to a positive electrode, and the negative conductive ring is used to connect to a negative electrode. The side of the positive and negative conductive rings facing the rotation axis has an arc-shaped contact surface for direct or indirect sliding contact of the terminals connected to the coil to supply power to the coil.

[0007] In the stator structure of the parallel motor model described above, the arc-shaped contact surface is located on the side of the corresponding conductive ring facing the rotating shaft, on the side of the corresponding conductive ring facing away from the rotating shaft, on the upper end face of the corresponding conductive ring, or on the lower end face of the corresponding conductive ring.

[0008] In the stator structure of the parallel motor model described above, when there are multiple pairs of conductive rings, the positive and negative conductive rings are arranged alternately in the circumferential direction.

[0009] When there are multiple pairs of magnets, the first magnet and the second magnet are arranged alternately in the circumferential direction.

[0010] In the stator structure described above for the parallel motor model, the number of conductive ring pairs is the same as the number of magnet pairs.

[0011] In the stator structure described above for a parallel motor model, each conductive ring / magnet is either a single unit or divided into two or more adjacent pieces. Preferably, each conductive ring / magnet is a single unit; however, dividing a conductive ring / magnet into two adjacent pieces is not excluded from the scope of this patent.

[0012] In the stator structure described above for the parallel motor model, the arc of the arc-shaped contact surface of each conductive ring is less than 180 / number of conductive ring pairs.

[0013] In the stator structure described above for the parallel motor model, the curvature of the conductive ring's arc-shaped contact surface approaches 180° / number of conductive ring pairs. Maximizing the curvature of the conductive ring's arc-shaped contact surface extends the coil's energizing time, ideally ensuring that all coils are always energized in parallel.

[0014] In the stator structure described above for the parallel motor model, adjacent conductive rings are isolated by insulating sheets.

[0015] The stator structure described above for the parallel motor model includes at least two pairs of magnets and at least two pairs of conductive rings.

[0016] In the stator structure of the parallel motor model described above, all the conductive rings have the same center, the same arc size, and are evenly distributed circumferentially; all the magnets have the same center, the same arc size, and are evenly distributed circumferentially.

[0017] In the stator structure of the parallel motor model described above, the positive electrode is the positive power supply, and the negative electrode is the grounding power.

[0018] Alternatively, the positive electrode may be a positive power source, the negative electrode may be a negative power source, and the stator may also include a grounding ring for grounding, and the grounding ring may have an arc-shaped contact surface for allowing the connection terminals to make sliding contact.

[0019] In the stator structure of the above-mentioned parallel motor model, the grounding ring has a 360-degree arc-shaped contact surface, and the grounding ring is located on the outer side of the shaft circumferentially so that the grounding terminal fixed on the shaft can slide in contact.

[0020] The advantages of this invention are: eliminating the brush and commutator, and replacing the brush with a conductive ring for power supply; the coil can be energized and commutated by directly sliding to the arc-shaped contact surface of the conductive ring; all coils can be connected in parallel, enabling all coils to work at all times; and there is no problem of rotating and energizing regardless of the number of coils. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a three-coil motor in the prior art;

[0022] Figure 2 This is a schematic diagram of the structure of a multi-coil motor in the prior art;

[0023] Figure 3 This is a schematic diagram of the structure of the present invention used in a parallel motor model;

[0024] Figure 4 This is a rendering of the parallel motor model in this scheme, showing the effect of setting multiple 90-degree coils.

[0025] Figure reference numerals: magnet pair 1; first magnet 11; second magnet 12; conductive ring pair 2; arc-shaped contact surface 21; coil 3; terminal 31; commutator 4; brush 5. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] like Figure 3 As shown, this embodiment discloses a stator structure for a parallel motor model, including at least one pair of magnets 1 consisting of a first magnet 11 and a second magnet 12, and at least one pair of conductive rings 2 consisting of a positive conductive ring and a negative conductive ring. The N pole of the first magnet 11 faces the rotor to act on the energized coil, and the S pole of the second magnet 12 faces the rotor to act on the energized coil. The positive conductive ring is used to connect to the positive electrode, and the negative conductive ring is used to connect to the negative electrode. Each conductive ring has an arc-shaped contact surface 21 for direct or indirect sliding contact with the terminal 31 connected to the coil 31 to supply power to the coil 3.

[0029] Specifically, the number of conductive ring pairs 2 is the same as the number of magnet pairs 1. When both the number of conductive ring pairs and the number of magnet pairs are one pair, the positive and negative conductive rings are symmetrically arranged with the rotation axis as the center line. The second magnet 12 and the first magnet 11 are also symmetrically arranged with the rotation axis as the center line.

[0030] When there are multiple pairs of conductive rings and magnets, the first magnet 11 and the second magnet 12 are arranged alternately in the circumferential direction, and the positive conductive rings and negative conductive rings are arranged alternately in the circumferential direction. The conductive rings and magnets can be arranged as follows: Figure 3The settings shown correspond one-to-one, or you can set them at different angles (to...). Figure 3 The structure formed by rotating the conductive ring around the rotation axis clockwise by a certain angle results in the conductive ring and the magnet being offset by a certain angle (e.g., 45 degrees). The specific offset angle is designed according to the actual situation and is not limited here.

[0031] Figure 4 The diagram shows two pairs of magnets (pair 1) and two pairs of conductive rings (pair 2). In actual operation, there can be one, three, four, or more pairs. Figure 4 The arc-shaped contact surface 21 is located on the side of the corresponding conductive ring facing the rotation axis. In practical applications, it can also be located on the side of the conductive ring facing away from the rotation axis, on the upper end face or the lower end face of the corresponding conductive ring. Preferably, all conductive rings and magnets are circumferentially uniformly distributed, and all conductive rings and magnets have the same center, with the centers of the conductive rings and magnets coinciding. All magnets have the same curvature, and all conductive rings have the same curvature. The conductive rings and magnets can have the same curvature or different curvatures. In actual application, the coil angle, the number of iron core slots spanned by each group of coils, the number of coil turns, and the number of coil groups can all be freely set by those skilled in the art as needed, and are not limited here.

[0032] Furthermore, each conductive ring / magnet is either a whole or cut into two or more adjacent pieces. A conductive ring / magnet cut into two or more pieces should be regarded as a whole. Therefore, in actual use, cutting a conductive ring / magnet into multiple pieces cannot circumvent the protection scope of this solution.

[0033] Furthermore, the arcuate contact surface 21 of the conductive ring has an arcuate radius less than 180° / number of conductive ring pairs. Preferably, the arcuate contact surface 21 of the conductive ring is close to 180° / number of conductive ring pairs. This allows adjacent conductive rings to be isolated by an insulating sheet, making the arcuate contact surface 21 approach 180° / number of conductive ring pairs. For example, when there is one pair of pairs, the arcuate contact surface 21 approaches 180 degrees; when there are two pairs of pairs, the arcuate contact surface 21 approaches 90 degrees; and when there are three pairs of pairs, the arcuate contact surface 21 approaches 60 degrees. Under the condition that the process allows, the closer the arcuate contact surface 21 is, the better. Here, "approaching" means that the deviation from the target (180 degrees, 90 degrees, 60 degrees) is within a very small range, such as 3 degrees, 5 degrees, 10 degrees, etc. The arc-shaped contact surface 21 refers to the section on the conductive ring that can contact the terminal 31 of the coil. In this embodiment, since the arc of each conductive ring is equal and has the same center, the entire inner surface, outer surface, upper surface or lower surface of each conductive ring is an arc-shaped contact surface 21.

[0034] like Figure 4As shown, when there are two pairs of conductive rings, multiple sets of 90-degree coils 3 can be used. Each set of coils 3 has two terminals 31 with an angle corresponding to the coil angle. The two terminals of each set of coils are used to slide in contact with the positive and negative conductive rings. The coil angle refers to the angle occupied by the coil on the 360-degree circumference of the iron core. When the coils 3 rotate, the two terminals 31 of each set of coils 3 rotate with the coil. The coils 31 slide in contact with the conductive rings through the two terminals 31. During the rotation of the coils, each set of coils 3 is independently connected to the conductive rings. In the structure of this embodiment, all coils can be connected in parallel, enabling all coils to work at all times. Multiple sets of coils are almost always energized, and the magnetic force acts on all coils almost always, thereby improving the working efficiency of the motor.

[0035] This design changes the traditional current switching and connection methods. Based on the stator structure of this design, the magnet pair 1 acts on each individual coil 3 for a longer period of time, and switching the current direction of any group of coils 3 will not affect the working state of other coils 3, thus avoiding the problem of mutual interference between different groups of coils 3 in traditional motors. It enables the magnet pair to act on almost all distributed coils of the rotor, meaning that there is always a force output to all coils, greatly improving working efficiency.

[0036] Example 2

[0037] Currently, there are two power supply methods for motors: 0-positive voltage power supply, such as 0-5V, 0-35V, etc., and negative voltage-positive voltage power supply, such as -2.5V-2.5V, -12V-12V, etc. Taking 0-5V and -2.5V-2.5V as examples, in Example 1, the positive terminal is 5V and the negative terminal is 0V, which can be directly grounded to achieve 0-5V power supply. In this example, the positive terminal is 2.5V and the negative terminal is -2.5V. In this case, the stator also includes a grounding ring, and the grounding ring has an arc-shaped contact surface for sliding contact of the grounding terminals.

[0038] Preferably, the grounding ring has a 360-degree arc-shaped contact surface, and the grounding ring is located on the outer circumference of the rotating shaft to allow the contacting end fixed on the rotating shaft to slide in contact. It can be located on the outer side of the rotating shaft, at the end of the conductive ring away from the coil, and the center of the grounding ring and the common center of the conductive ring are both on the rotating shaft. The grounding ring and the conductive ring can be fixed to a non-rotating part such as the motor housing.

[0039] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0040] Although this document frequently uses terms such as magnet pair 1, conductive ring pair 2, arc-shaped contact surface 21, coil 3, contact terminal 31, commutator 4, and brush 5, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A stator structure for a parallel motor model, characterized in that, include, At least two pairs of magnets consisting of a first magnet and a second magnet, with the first magnet and the second magnet arranged alternately in the circumferential direction; At least two pairs of conductive rings consisting of positive and negative conductive rings, with the positive and negative conductive rings arranged alternately in the circumferential direction; The N pole of the first magnet faces the rotor, and the S pole of the second magnet faces the rotor. The positive conductive ring is used to connect to the positive electrode, and the negative conductive ring is used to connect to the negative electrode. Both the positive and negative conductive rings have arc-shaped contact surfaces for direct or indirect sliding contact of the terminals connected to the coil. The number of conductive ring pairs is the same as the number of magnet pairs; The arc of the circular contact surface of each conductive ring is close to 180 / number of conductive ring pairs, and adjacent conductive rings are isolated by an insulating sheet. All conductive rings have the same center, the same arc size, and are evenly distributed circumferentially; all magnets have the same center, the same arc size, and are evenly distributed circumferentially.

2. The stator structure for a parallel motor model according to claim 1, characterized in that, The arc-shaped contact surface is located on the side of the conductive ring facing the rotating shaft, on the side of the conductive ring facing away from the rotating shaft, on the upper end face of the conductive ring, or on the lower end face of the conductive ring.

3. The stator structure for a parallel motor model according to claim 2, characterized in that, Each conductive ring / magnet is either a single unit or cut into two or more adjacent pieces.

4. The stator structure for a parallel motor model according to claim 3, characterized in that, All conductive rings and all magnets are evenly distributed circumferentially.

5. The stator structure for a parallel motor model according to claim 1, characterized in that, The positive electrode is the positive power source, and the negative electrode is the grounding power. Alternatively, the positive electrode may be a positive power source, the negative electrode may be a negative power source, and the stator may also include a grounding ring for grounding, and the grounding ring may have an arc-shaped contact surface for allowing the connection terminals to make sliding contact.

6. The stator structure for a parallel motor model according to claim 5, characterized in that, The grounding ring has a 360-degree arc-shaped contact surface, and the grounding ring is located on the outer side of the rotating shaft so that the grounding terminal fixed on the rotating shaft can slide in contact.

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