A brushless motor stator triple connection winding structure

Abstract

The application 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 interval distributed winding teeth and wire grooves. The winding teeth and the wire grooves are alternately distributed along the circumference. The wire inlet end of the first phase winding firstly passes through the piercing end of the first pin, then winds around the ninth winding tooth for one turn, passes through the piercing end of the first pin again after one turn winding, then passes through the outside of the wire groove between the ninth winding tooth and the first winding tooth, and continues to pass through the piercing end of the second pin, then winds on the first winding tooth, the second winding tooth and the third winding tooth in sequence, and finally forms the first phase winding. The above-mentioned brushless motor stator triple-connection winding structure solves the technical problem of invalid connection of the wire inlet of the phase winding, and enhances the stability and reliability of the connection between the wire inlet of the winding and the pin terminal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brushless motors, in particular to a three-connection winding structure of a brushless motor stator. BACKGROUND

[0002] Brushless motors have been widely used in industrial automation, household appliances and automotive industries 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 in operation, the winding coils are supplied with power through a control circuit, generating a rotating magnetic field to drive the rotor to rotate, thereby realizing the function of the motor.

[0003] However, in actual application, the winding coils in the winding teeth may be subjected to impact due to mechanical vibration, thermal effects and other factors. If the contact position between the winding wire and the pin terminal is disconnected or poorly contacted, it will cause the motor performance to decline or even completely fail, thereby affecting the normal operation of the entire system.

[0004] In existing brushless motor designs, the winding wire usually only passes through one pin for connection. Once the connection point between the winding wire and the pin fails, the entire winding may lose power supply, making the motor unable to work normally.

[0005] Therefore, how to provide a three-connection winding structure of a brushless motor stator to enhance the stability and reliability of the connection between the winding wire and the pin terminal is a technical problem that needs to be solved by those skilled in the art at present. SUMMARY

[0006] The purpose of the present application is to provide a three-connection winding structure of a brushless motor stator, which solves the technical problem of existing phase winding wire connection failure.

[0007] To achieve the above-mentioned purpose, the present application provides a three-connection 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 is provided with a plurality of interval distributed winding teeth and wire slots, the winding teeth and the wire slots are alternately distributed along the circumference,

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

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

[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 wound in series on the corresponding winding teeth;

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

[0012] the incoming wire end of the first phase winding first passes through the piercing end of the first pin, then makes one turn around the ninth winding tooth, after completing one turn, passes through the piercing end of the first pin again, then passes outside the winding slot between the ninth winding tooth and the first winding tooth, and continues to pass through the piercing end of the second pin, then successively winds on the first winding tooth, the second winding tooth and the third winding tooth, and finally forms the first phase winding;

[0013] the incoming wire end of the second phase winding first passes through the piercing end of the third pin, then makes one turn around the third winding tooth, after completing one turn, passes through the piercing end of the third pin again, then passes outside the winding slot between the third winding tooth and the fourth winding tooth, and continues to pass through the piercing end of the fourth pin, then successively winds on the fourth winding tooth, the fifth winding tooth and the sixth winding tooth, and finally forms the second phase winding;

[0014] the incoming wire end of the third phase winding first passes through the piercing end of the fifth pin, then makes one turn around the sixth winding tooth, after completing one turn, passes through the piercing end of the fifth pin again, then passes outside the winding slot between the sixth winding tooth and the seventh winding tooth, and continues to pass through the piercing end of the sixth pin, then successively winds on the seventh winding tooth, the eighth winding tooth and the ninth winding tooth, and finally forms 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 parallelly welded in a Y-shaped connection manner.

[0016] Preferably, the incoming wire end of the first phase winding makes one turn around the inside of the ninth winding tooth obliquely downward; the incoming wire end of the second phase winding makes one turn around the inside of the third winding tooth obliquely downward; the incoming wire end of the third phase winding makes one turn around the inside of the sixth winding tooth obliquely downward.

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

[0018] Preferably, the wire routing of the incoming ends of the first phase winding, the second phase winding and the third phase winding from outside the wire slot is a horizontal line or an inclined line, and the motor housing is correspondingly provided with a horizontal avoiding slot and an inclined avoiding slot.

[0019] Preferably, the adjacent coils of the first phase winding, the second phase winding and the third phase winding are connected in series through the winding cross line, and the motor housing is provided with a limiting column, and the winding cross line is attached outside the limiting column.

[0020] With respect to the above background art, the present application provides a three-connection winding structure of a brushless motor stator. The incoming end of each phase winding is connected to a pin on the motor housing in a piercing contact manner. Each phase winding is not only connected in series with one pin, but also connected with another pin, so that there are three connection points between each phase winding and two pins in total. In particular, one of the pins is connected with the phase winding twice: once when the incoming end is wound through the piercing end of the pin, and the second time when the winding passes through the area near the pin again during winding. The other pin is connected with the phase winding once, i.e. after winding is completed, the piercing end of the pin is passed through. The three-connection design greatly improves the reliability and durability of the connection. Even if one of the connection points fails due to various reasons, the other two connection points can still ensure the normal on-off of the circuit. Therefore, the connection will completely fail only when all three contact points fail, reducing the probability of connection failure, enhancing the stability and reliability of the connection between the winding incoming line and the pin terminal, prolonging the service life of the motor, and improving the strength of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.

[0022] Figure 1 A three-connection winding structure of a brushless motor stator provided by an embodiment of the present application;

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

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

[0025] Figure 4The second pin of the first phase winding is connected with the winding wire.

[0026] Wherein:

[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 shell, 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 technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0029] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0030] Referring to Figures 1-4 The present application provides a three-winding structure of a brushless motor stator, which 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 wire slots distributed at intervals, and the winding teeth and wire slots are alternately distributed along the circumference. The phase windings comprise 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 wound in series on the corresponding winding tooth. The first pin 14, the second pin 15, the third pin 16, the fourth pin 17, the fifth pin 18 and the sixth pin 19 are arranged on the motor shell 13.

[0031] That is, the stator core is a basic component of the motor, and the stator core is provided with a plurality of winding teeth and wire slots distributed at intervals. The winding teeth and wire slots are alternately distributed along the circumference, providing necessary support and guidance for the winding of the phase windings. The pins are used for connection with external circuits to realize input and output of current.

[0032] The winding process of the first phase winding 1 is as follows:

[0033] Inlet connection: The inlet end of the first phase winding 1 first passes through the piercing end of the first pin 14, realizing the connection with the external circuit of the motor.

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

[0035] Pass through the pin again: After completing one turn, the inlet end passes through the piercing end of the first pin 14 again, in order to ensure the reliability of the electrical connection.

[0036] Cross the winding slot: Then, the inlet end passes through the piercing end of the second pin 15 from the outside of the winding slot between the ninth winding tooth 12 and the first winding tooth 4, and then the inlet end is wound on the first winding tooth 4, the second winding tooth 5 and the third winding tooth 6 in turn, forming a complete coil of the first phase winding 1.

[0037] 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 with different pins, as follows:

[0039] The inlet end of the second phase winding 2 passes through the third pin 16, winds one turn on the third winding tooth 6, and then passes through the third pin 16 again, then passes through 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 winds on the fourth winding tooth 7, the fifth winding tooth 8 and the sixth winding tooth 9.

[0040] The inlet end of the third phase winding 3 passes through the fifth pin 18, winds one turn on the sixth winding tooth 9, and then passes through the fifth pin 18 again, then passes through 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 winds on the seventh winding tooth 10, the eighth winding tooth 11 and the ninth winding tooth 12.

[0041] The outlet end of the first phase winding 1, the outlet end of the second phase winding 2 and the outlet end of the third phase winding 3 are connected by wires or soldering points respectively, forming a common connection point (i.e. the center point of the Y shape). Since the outlet end is not connected with the pin, there will be no resistance failure, thereby reducing the failure probability.

[0042] Therefore, the application provides a triple connection winding structure of a brushless motor stator. The incoming wire end of each phase winding is connected to the pin on the motor shell in a piercing contact manner. Each phase winding is not only connected in series with one pin, but also connected with another pin, so that there are three connection points between each phase winding and two pins. In particular, one of the pins is connected with the phase winding twice: once when the incoming wire end of the winding passes through the piercing end of the pin, and the second time when the winding passes through the area near the pin again during winding. The other pin is connected with the phase winding once, i.e. after winding, the winding passes through the piercing end of the pin. The triple connection design greatly improves the reliability and durability of the connection. Even if one of the connection points fails due to various reasons, the other two connection points can still ensure the normal on-off of the circuit. Therefore, the connection will completely fail only when all three contact points fail, which reduces the probability of connection failure, enhances the stability and reliability of the connection between the winding incoming wire and the pin terminal, prolongs the service life of the motor, and improves the strength of the structure.

[0043] In addition, when the pin angle position of the current phase winding moves to the next phase winding, and the double-point connected pin fails, the additional winding does not affect the magnetic field of the current phase, and the adjacent phase is not powered, so the adjacent phase winding is not affected, achieving a similar interlocking effect.

[0044] Based on the above embodiment, referring to Figures 3-4 Taking the first phase winding as an example, the incoming wire end of the first phase winding 1 is inclined downward to pass around the inner side of the ninth winding tooth 12 for one turn. The incoming wire end of the second phase winding 2 is inclined downward to pass around the inner side of the third winding tooth 6 for one turn. The incoming wire end of the third phase winding 3 is inclined downward to pass around the inner side of the sixth winding tooth 9 for one turn. The winding of the first phase winding 1 is inclined downward to be wound on the first winding tooth 4 after passing through the second pin 15. The winding end of the second phase winding 2 is inclined downward to be wound on the fourth winding tooth 7 after passing through the fourth pin 17. The winding of the third phase winding 3 is inclined downward to be wound on the seventh winding tooth 10 after passing through the sixth pin 19. The winding of the phase winding of the application is a lacquered wire.

[0045] Since the existing phase winding passes through the pin and then vertically downward, it is not inclined downward and then wound. The lacquered wire of the application is an inclined crossing wire. The winding method of the inclined crossing wire increases the contact area between the lacquered wire and the coil of the winding set, thereby increasing the compression length of the coil on the lacquered wire, reducing looseness and vibration, and further reducing the failure rate.

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

[0047] Based on the above embodiment, referring to Figure 2For example, the first phase winding, the second phase winding and the third phase winding are horizontal lines or inclined lines when the incoming ends pass outside the winding slot, and the motor housing 13 is correspondingly provided with horizontal avoidance grooves and inclined avoidance grooves, and the inclined lines are preferred.

[0048] That is, the incoming ends of the first phase winding, the second phase winding and the third phase winding can be horizontal lines or inclined lines when they pass outside the winding slot. 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 along the horizontal direction or the inclined direction.

[0049] In order to adapt to the two different wiring methods, the motor housing 13 is correspondingly designed with horizontal avoidance grooves and inclined avoidance grooves, and the avoidance grooves are used to ensure that the enameled wire will not be hindered by the shell during winding, so as to smoothly complete the winding action.

[0050] On the basis of the above embodiment, the adjacent coils of the first phase winding, the second phase winding and the third phase winding are connected in series through the winding cross line 20, the motor housing 13 is provided with a limiting column 21, the winding cross line 20 is attached outside the limiting column 21, and the winding cross line 20 can be an enameled wire, so as to avoid the impact on the enameled wire and protect the enameled wire from functional circuit breakage.

[0051] It should be noted that in the present specification, the relationship terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between the entities.

[0052] The principles and implementation modes of the present application are described by using specific examples in the present application, and the above embodiment is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A triple connection 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 is provided with a plurality of interval distributed winding teeth and wire slots, the winding teeth and the wire slots are alternately distributed along the circumference, characterized in that: the phase windings comprise 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 wound in series on the corresponding winding tooth; 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) are arranged on a motor housing (13); the wire inlet end of the first phase winding (1) first passes through the piercing end of the first pin (14), then makes one turn around the ninth winding tooth (12), after completing one turn, it passes through the piercing end of the first pin (14) again, then passes from the outside of the wire slot between the ninth winding tooth (12) and the first winding tooth (4), and continues to pass through the piercing end of the second pin (15), then successively winds on the first winding tooth (4), the second winding tooth (5) and the third winding tooth (6), and finally forms the first phase winding (1); the wire inlet end of the second phase winding (2) first passes through the piercing end of the third pin (16), then makes one turn around the third winding tooth (6), after completing one turn, it passes through the piercing end of the third pin (16) again, then passes from the outside of the wire slot between the third winding tooth (6) and the fourth winding tooth (7), and continues to pass through the piercing end of the fourth pin (17), then successively winds on the fourth winding tooth (7), the fifth winding tooth (8) and the sixth winding tooth (9), and finally forms the second phase winding (2); the wire inlet end of the third phase winding (3) first passes through the piercing end of the fifth pin (18), then makes one turn around the sixth winding tooth (9), after completing one turn, it passes through the piercing end of the fifth pin (18) again, then passes from the outside of the wire slot between the sixth winding tooth (9) and the seventh winding tooth (10), and continues to pass through the piercing end of the sixth pin (19), then successively winds on the seventh winding tooth (10), the eighth winding tooth (11) and the ninth winding tooth (12), and finally forms the third phase winding (3). The wire outlet ends of the first phase winding (1), the second phase winding (2) and the third phase winding (3) are parallelly welded in a Y-shaped connection manner. ​ ​ ​ ​ ​ ​ ​ 2. A triple connection winding structure of a brushless motor stator according to claim 1, characterized in that, ​ 3. A brushless motor stator triple connection winding structure according to claim 2, characterized in that, The incoming end of the first phase winding is obliquely downwardly wound around the inner side of the ninth winding tooth (12) for one turn; the incoming end of the second phase winding is obliquely downwardly wound around the inner side of the third winding tooth (6) for one turn; and the incoming end of the third phase winding is obliquely downwardly wound around the inner side of the sixth winding tooth (9) for one turn.

4. A triple connection winding structure of a brushless motor stator according to claim 3, characterized in that, The winding of the first phase winding (1) is obliquely downwardly wound on the first winding tooth (4) after passing through the second pin (15); the winding end of the second phase winding (2) is obliquely downwardly wound on the fourth winding tooth (7) after passing through the fourth pin (17); and the winding of the third phase winding (3) is obliquely downwardly wound on the seventh winding tooth (10) after passing through the sixth pin (19).

5. A three-fold connection winding structure of a brushless motor stator according to claim 3, characterized in that, The wire traces of the incoming ends of the first phase winding (1), the second phase winding (2) and the third phase winding (3) passing outside the winding slot are horizontal lines or oblique lines, and the motor shell (13) is correspondingly provided with horizontal avoiding grooves and oblique avoiding grooves.

6. A triple connection winding structure of a brushless motor stator according to claim 4, wherein The adjacent coils of the first phase winding (1), the second phase winding (2) and the third phase winding (3) are connected in series through winding cross wires (20), and the motor shell (13) is provided with a limiting column (21), and the winding cross wires (20) are located outside the limiting column (21).

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