Triple connection winding structure of brushless motor stator

Abstract

The invention discloses a brushless motor stator triple-connection winding structure, and relates to the technical field of brushless motors, the brushless motor stator triple-connection winding structure comprises a stator core and a plurality of phase windings wound on the stator core, the stator core is provided with a plurality of winding teeth and slots which are distributed at intervals, and the winding teeth and the slots are alternately distributed along the circumferential direction. The wire inlet end of the first phase winding firstly penetrates through the piercing end of the first pin, then is wound around the ninth winding tooth by one circle, then penetrates through the piercing end of the first pin again after being wound by one circle, then winds around the outer side of the winding groove between the ninth winding tooth and the first winding tooth, and continues to penetrate through the piercing end located on the second pin. And then winding is carried out on the first winding teeth, the second winding teeth and the third winding teeth in sequence, and finally a first-phase winding is formed. According to the triple-connection winding structure of the brushless motor stator, the technical problem of connection failure of an existing phase winding inlet wire is solved, and the stability and the reliability of connection between the winding inlet wire and the pin terminal are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of brushless motors, and in particular to a triple-connected winding structure of a brushless motor stator. Background Art

[0002] Brushless motors are widely used in industrial automation, household appliances, and the automotive industry due to their high efficiency, high reliability, and low maintenance requirements. One of the core components of a brushless motor is the stator, which includes multiple winding teeth for embedding winding coils. When the motor is working, power is supplied to the winding coils through the control circuit to generate a rotating magnetic field, which drives the rotor to rotate, thereby realizing the function of the motor.

[0003] However, in actual applications, the winding coils in the winding teeth may be impacted by mechanical vibration, thermal effects, etc. If the contact position between the winding input wire and the pin terminal is broken or poorly contacted, the motor performance will be reduced or even completely failed, thus affecting the normal operation of the entire system.

[0004] In existing brushless motor designs, the winding input line is usually connected through only one pin. Once there is a problem with the connection point between the winding input line and the pin, the entire winding may lose power supply, causing the motor to fail to work properly.

[0005] Therefore, how to provide a brushless motor stator triple connection winding structure to enhance the stability and reliability of the connection between the winding input line and the pin terminal is a technical problem that technicians in this field currently need to solve. Summary of the invention

[0006] The purpose of the present invention is to provide a brushless motor stator triple connection winding structure, which solves the technical problem of failure of the existing phase winding incoming line connection.

[0007] To achieve the above object, the present invention provides a brushless motor stator triple connection winding structure, comprising a stator core and a plurality of phase windings wound on the stator core, wherein the stator core is provided with a plurality of winding teeth and wire slots distributed at intervals, and the winding teeth and the wire slots are alternately distributed along the circumferential direction.

[0008] The phase windings include a first phase winding, a second phase winding and a third phase winding;

[0009] The winding teeth include a first winding tooth, a second winding tooth, a third winding tooth, a fourth winding tooth, a fifth winding tooth, a sixth winding tooth, a seventh winding tooth, an eighth winding tooth and a ninth winding tooth;

[0010] The first phase winding, the second phase winding and the third phase winding each include a first coil, a second coil and a third coil which are wound in series on the corresponding winding teeth;

[0011] A first pin, a second pin, a third pin, a fourth pin, a fifth pin and a sixth pin are arranged on the motor housing;

[0012] The inlet end of the first phase winding first passes through the punctured end of the first pin, then is wound around the ninth winding tooth for one circle, and after completing one circle, it passes through the punctured end of the first pin again, then goes around the outside of the winding groove between the ninth winding tooth and the first winding tooth, and continues to pass through the punctured end of the second pin, and then is wound on the first winding tooth, the second winding tooth and the third winding tooth in sequence, finally forming the first phase winding;

[0013] The inlet end of the second phase winding first passes through the pierced end of the third pin, then is wound around the third winding tooth for one circle, and after completing one circle of winding, it passes through the pierced end of the third pin again, then goes around the outside of the winding groove between the third winding tooth and the fourth winding tooth, and continues to pass through the pierced end of the fourth pin, and then is wound on the fourth winding tooth, the fifth winding tooth and the sixth winding tooth in sequence, finally forming the second phase winding;

[0014] The incoming wire end of the third phase winding first passes through the pierced end of the fifth pin, then is wound around the sixth winding tooth for one circle, and after completing one circle of winding, it passes through the pierced end of the fifth pin again, then bypasses from the outside of the winding groove between the sixth winding tooth and the seventh winding tooth, and continues to pass through the pierced end of the sixth pin, and then is wound on the seventh winding tooth, the eighth winding tooth and the ninth winding tooth in turn, finally forming the third phase winding.

[0015] Preferably, the outgoing wire ends of the first phase winding, the second phase winding and the third phase winding are welded in parallel in a Y-shaped connection.

[0016] Preferably, the inlet end of the first phase winding is tilted downward and wound around the inner side of the ninth winding tooth in one circle; the inlet end of the second phase winding is tilted downward and wound around the inner side of the third winding tooth in one circle; the inlet end of the third phase winding is tilted downward and wound around the inner side of the sixth winding tooth in one circle.

[0017] Preferably, the winding wire of the first phase winding passes through the second pin and is then wound obliquely downward on the first winding tooth; the winding end of the second phase winding passes through the fourth pin and is then wound obliquely downward on the fourth winding tooth; the winding wire of the third phase winding passes through the sixth pin and is then wound obliquely downward on the seventh winding tooth.

[0018] Preferably, the incoming wire ends of the first phase winding, the second phase winding and the third phase winding are routed along a horizontal line or an inclined line from the outside of the winding slot, and thus a horizontal avoidance groove and an inclined avoidance groove are correspondingly provided on the motor housing.

[0019] Preferably, adjacent coils of the first phase winding, the second phase winding and the third phase winding are respectively connected in series through winding cross-wires, and a limiting column is provided on the motor housing, and the winding cross-wires are located on the outside of the limiting column.

[0020] With respect to the above background technology, the present invention provides a brushless motor stator triple connection winding structure, in which the incoming wire end of each phase winding is connected to the pin on the motor housing by a puncture contact method, and each phase winding winding is not only connected in series with one pin, but also connected with another pin, so that there are a total of three connection points between each phase winding and two pins. In particular, one of the pins is connected to the phase winding winding twice: the first time is to pass through the puncture end of the pin at the incoming wire end for winding, and the second time is to pass through the area near the pin again during the winding process. The other pin is connected to the phase winding winding once, that is, after the winding is completed, it passes through the puncture end of the pin, and the triple connection design greatly improves the reliability and durability of the connection. Even if one of the connection points fails for various reasons, the other two connection points can still ensure the normal on-off of the circuit. Therefore, only when all three contact points fail, the connection will fail completely, reducing the probability of connection failure, enhancing the stability and reliability of the connection between the winding incoming wire and the pin terminal, extending the service life of the motor, and improving the strength of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 A schematic diagram of a triple-connected winding structure of a brushless motor stator provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the connection between the first pin and the second pin of the first phase winding provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the connection between the first pin of the first phase winding and the phase winding incoming line provided by an embodiment of the present invention;

[0025] Figure 4A schematic diagram of the connection between the second pin of the first phase winding and the winding wire provided in an embodiment of the present invention.

[0026] in:

[0027] 1-first phase winding, 2-second phase winding, 3-third phase winding, 4-first winding tooth, 5-second winding tooth, 6-third winding tooth, 7-fourth winding tooth, 8-fifth winding tooth, 9-sixth winding tooth, 10-seventh winding tooth, 11-eighth winding tooth, 12-ninth winding tooth, 13-motor housing, 14-first pin, 15-second pin, 16-third pin, 17-fourth pin, 18-fifth pin, 19-sixth pin, 20-winding cross-wire, 21-limiting column. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] See also Figure 1-Figure 4 The present application provides a triple-connected winding structure of a brushless motor stator, comprising a stator core and a plurality of phase windings wound on the stator core, the stator core being provided with a plurality of winding teeth and wire slots distributed at intervals, the winding teeth and wire slots being alternately distributed along the circumferential direction, the phase winding comprising a first phase winding 1, a second phase winding 2 and a third phase winding 3; the winding teeth comprising a first winding tooth 4, a second winding tooth 5, a third winding tooth 6, a fourth winding tooth 7, a fifth winding tooth 8, a sixth winding tooth 9, a seventh winding tooth 10, an eighth winding tooth 11 and a ninth winding tooth 12; the first phase winding 1, the second phase winding 2 and the third phase winding 3 each comprising a first coil, a second coil and a third coil wound in series on corresponding winding teeth; a first pin 14, a second pin 15, a third pin 16, a fourth pin 17, a fifth pin 18 and a sixth pin 19 arranged on a motor housing 13.

[0031] That is to say, the stator core is the basic component of the motor. It is provided with a plurality of winding teeth and slots spaced apart from each other. The winding teeth and slots are alternately distributed along the circumferential direction, providing necessary support and guidance for the winding of the phase winding. The pins are used to connect to the external circuit to realize the input and output of current.

[0032] Winding process of the first phase winding 1:

[0033] Incoming line connection: The incoming line of the first phase winding 1 first passes through the pierced end of the first pin 14 to achieve connection with the external circuit of the motor.

[0034] Initial winding: Subsequently, the incoming wire end is wound around the ninth winding tooth 12 for one circle, which helps to fix the incoming wire end.

[0035] Passing through the pin again: After completing one circle of winding, the incoming wire end passes through the pierced end of the first pin 14 again to ensure the reliability of the electrical connection.

[0036] Crossing the winding groove: Then, the incoming wire end passes through the punctured end of the second pin 15 from the outside of the winding groove between the ninth winding tooth 12 and the first winding tooth 4, and then, the incoming wire end is wound on the first winding tooth 4, the second winding tooth 5 and the third winding tooth 6 in sequence to form a complete coil of the first phase winding 1.

[0037] The winding process of the second phase winding 2 and the third phase winding 3:

[0038] The winding process of the second phase winding 2 and the third phase winding 3 is similar to that of the first phase winding 1, but they start and end on different winding teeth and are connected to different pins, as follows:

[0039] The incoming wire end of the second phase winding 2 passes through the third pin 16, is wound once on the third winding tooth 6, and then passes through the third pin 16 again, then passes around the outside of the wire slot between the third winding tooth 6 and the fourth winding tooth 7, passes through the fourth pin 17, and finally is wound on the fourth winding tooth 7, the fifth winding tooth 8, and the sixth winding tooth 9;

[0040] The incoming end of the third phase winding 3 passes through the fifth pin 18, is wound around the sixth winding tooth 9 once, and then passes through the fifth pin 18 again, then goes around the outside of the wire slot between the sixth winding tooth 9 and the seventh winding tooth 10, passes through the sixth pin 19, and finally is wound around the seventh winding tooth 10, the eighth winding tooth 11 and the ninth winding tooth 12.

[0041] The outgoing line end of the first phase winding 1 is connected to the outgoing line end of the second phase winding 2 and the outgoing line end of the third phase winding 3 through wires or welding points to form a common connection point (i.e., the center point of the Y shape). Since the outgoing line end is not connected to the pin, resistance failure will not occur, thereby reducing the failure probability.

[0042] Therefore, the present application provides a brushless motor stator triple connection winding structure, the incoming line end of each phase winding is connected to the pin on the motor housing by puncture contact, each phase winding winding is not only connected in series with one pin, but also connected with another pin, so that each phase winding has a total of three connection points between the two pins. In particular, one of the pins is connected to the phase winding winding twice: the first time is to pass through the puncture end of the pin at the incoming line end for winding, and the second time is to pass through the area near the pin again during the winding process. The other pin is connected to the phase winding winding once, that is, the puncture end of the pin is passed through after the winding is completed. The triple connection design greatly improves the reliability and durability of the connection. Even if one of the connection points fails for various reasons, the other two connection points can still ensure the normal on-off of the circuit. Therefore, only when all three contact points fail, the connection will fail completely, reducing the probability of connection failure, enhancing the stability and reliability of the connection between the winding incoming line and the pin terminal, extending the service life of the motor, and improving the strength of the structure.

[0043] In addition, the pin angle position of the current phase winding moves to the next phase winding. When the pin of the double-point connection fails, the appearance of one more turn of winding will not affect the magnetic field of the current phase. At the same time, the adjacent phases are not energized temporarily, so the adjacent phase windings are not affected, achieving a quasi-interlocking effect.

[0044] Based on the above embodiments, see Figure 3-Figure 4 Taking the first phase winding as an example, the incoming wire end of the first phase winding 1 is tilted downward and wound around the inner side of the ninth winding tooth 12 for one circle; the incoming wire end of the second phase winding 2 is tilted downward and wound around the inner side of the third winding tooth 6 for one circle; the incoming wire end of the third phase winding 3 is tilted downward and wound around the inner side of the sixth winding tooth 9 for one circle; the winding wire of the first phase winding 1 passes through the second pin 15 and is tilted downward and wound on the first winding tooth 4; the winding wire end of the second phase winding 2 passes through the fourth pin 17 and is tilted downward and wound on the fourth winding tooth 7; the winding wire of the third phase winding 3 passes through the sixth pin 19 and is tilted downward and wound on the seventh winding tooth 10, and the winding wire of the phase winding of the present application is enameled wire.

[0045] Since the existing phase winding is wound vertically downward after passing through the pin, instead of being wound diagonally downward, the enameled wire in the present application is an oblique cross-wire. The winding method of the oblique cross-wire increases the contact area between the enameled wire and the coil of the winding group, thereby increasing the compression length of the coil on the enameled wire, which can reduce looseness and vibration, and thus reduce the failure rate.

[0046] The diagonal winding method also helps to optimize the structure of the winding, making it more compact and efficient.

[0047] Based on the above embodiments, see Figure 2Taking the first phase winding as an example, the incoming wire ends of the first phase winding 1, the second phase winding 2 and the third phase winding 3 are routed along a horizontal line or an inclined line from the outside of the winding groove, and a horizontal avoidance groove and an inclined avoidance groove are correspondingly provided on the motor housing 13. The present application prefers an inclined line.

[0048] That is, when the incoming wire ends of the first phase winding 1, the second phase winding 2 and the third phase winding 3 are wound from the outside of the winding slot, the routing mode can be a horizontal line or an inclined line. This means that when the enameled wire is introduced from the outside of the winding slot and connected to the pin inside the motor, it can be wound in a horizontal direction or an inclined direction.

[0049] In order to adapt to these two different wiring methods, the motor housing 13 is correspondingly designed with horizontal avoidance grooves and inclined avoidance grooves. The purpose of the avoidance grooves is to ensure that the enameled wire will not be hindered by the housing during the winding process, so that the winding action can be completed smoothly.

[0050] Based on the above embodiments, adjacent coils of the first phase winding 1, the second phase winding 2 and the third phase winding 3 are respectively connected in series through winding cross-wires 20. A limiting column 21 is provided on the motor housing 13. The winding cross-wires 20 are located on the outside of the limiting column 21. The winding cross-wires 20 can be enameled wires to prevent the enameled wires from being impacted, protect the enameled wires and prevent functional circuit breakage.

[0051] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0052] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A brushless motor stator triple connection winding structure, comprising a stator core and a plurality of phase windings wound on the stator core, wherein the stator core is provided with a plurality of winding teeth and wire slots distributed at intervals, wherein the winding teeth and the wire slots are alternately distributed along the circumferential direction, and characterized in that: The phase winding comprises a first phase winding (1), a second phase winding (2) and a third phase winding (3); The winding teeth comprise a first winding tooth (4), a second winding tooth (5), a third winding tooth (6), a fourth winding tooth (7), a fifth winding tooth (8), a sixth winding tooth (9), a seventh winding tooth (10), an eighth winding tooth (11) and a ninth winding tooth (12); The first phase winding (1), the second phase winding (2) and the third phase winding (3) each comprise a first coil, a second coil and a third coil which are wound in series on the corresponding winding teeth; A first pin (14), a second pin (15), a third pin (16), a fourth pin (17), a fifth pin (18) and a sixth pin (19) arranged on the motor housing (13); The incoming wire end of the first phase winding (1) first passes through the pierced end of the first pin (14), then is wound around the ninth winding tooth (12) for one circle, and after completing one circle, it passes through the pierced end of the first pin (14) again, then goes around the outside of the winding slot between the ninth winding tooth (12) and the first winding tooth (4), and continues to pass through the pierced end of the second pin (15), and then is wound on the first winding tooth (4), the second winding tooth (5) and the third winding tooth (6) in sequence, finally forming the first phase winding (1); The inlet end of the second phase winding (2) first passes through the pierced end of the third pin (16), then is wound around the third winding tooth (6) for one circle, and after completing one circle, it passes through the pierced end of the third pin (16) again, then bypasses from the outside of the winding slot between the third winding tooth (6) and the fourth winding tooth (7), and continues to pass through the pierced end located at the fourth pin (17), and then is wound on the fourth winding tooth (7), the fifth winding tooth (8) and the sixth winding tooth (9) in sequence, finally forming the second phase winding (2); The incoming wire end of the third phase winding (3) first passes through the pierced end of the fifth pin (18), then winds around the sixth winding tooth (9) for one circle, and after completing one circle of winding, passes through the pierced end of the fifth pin (18) again, then bypasses the outside of the winding slot between the sixth winding tooth (9) and the seventh winding tooth (10), and continues to pass through the pierced end of the sixth pin (19), and then winds around the seventh winding tooth (10), the eighth winding tooth (11) and the ninth winding tooth (12) in sequence, finally forming the third phase winding (3).

2. A brushless motor stator triple connection winding structure according to claim 1, characterized in that: The outgoing wire ends of the first phase winding (1), the second phase winding (2) and the third phase winding (3) are welded in parallel in a Y-shaped connection.

3. The triple-connected winding structure of a brushless motor stator according to claim 2, characterized in that: The inlet end of the first phase winding is tilted downward and wound around the inner side of the ninth winding tooth (12) for one turn; the inlet end of the second phase winding is tilted downward and wound around the inner side of the third winding tooth (6) for one turn; the inlet end of the third phase winding is tilted downward and wound around the inner side of the sixth winding tooth (9) for one turn.

4. The triple-connected winding structure of a brushless motor stator according to claim 3, characterized in that: The winding wire of the first phase winding (1) passes through the second pin (15) and is then wound obliquely downward on the first winding tooth (4); the winding wire end of the second phase winding (2) passes through the fourth pin (17) and is then wound obliquely downward on the fourth winding tooth (7); and the winding wire of the third phase winding (3) passes through the sixth pin (19) and is then wound obliquely downward on the seventh winding tooth (10).

5. The triple-connected winding structure of a brushless motor stator according to claim 3, characterized in that: The incoming wire ends of the first phase winding (1), the second phase winding (2) and the third phase winding (3) are arranged along a horizontal line or an inclined line from the outside of the winding slot, and the motor housing (13) is provided with a horizontal avoidance slot and an inclined avoidance slot accordingly.

6. The triple-connected winding structure of a brushless motor stator according to claim 4, characterized in that: Adjacent coils of the first phase winding (1), the second phase winding (2) and the third phase winding (3) are respectively connected in series via winding crossovers (20); a limiting column (21) is provided on the motor housing (13); and the winding crossovers (20) are located in close contact with the outside of the limiting column (21).

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