Connecting structure of motor stator assembly and printed circuit board assembly

Abstract

The utility model relates to a connecting structure. A connecting structure of a motor stator assembly and a printed circuit board assembly comprises a motor stator winding support, the number of grooves of the motor stator winding support is A, the number of winding grooves of each phase is B, B = A / 3, and winding wire ends of each phase are connected in a winding mode in sequence. A stator end cover is arranged above the motor stator winding support, a guide hole is arranged on the stator end cover, and a three-phase outgoing line terminal extending out of the stator end cover is fixed on the PCBA board. The utility model provides the connecting structure of the motor stator assembly and the printed circuit board assembly, which is simple in structure and omits a Busbar structure, thereby simplifying the manufacturing and assembling processes, improving the system stability and reducing the cost; the technical problems that in the prior art, a motor structure is connected through a Busbar assembly, the structure is complex, the manufacturing cost is high, and the reliability is not good enough are solved.

Description

Technical Field

[0001] The utility model relates to a connection structure, in particular to a connection structure between a motor stator assembly and a printed circuit board assembly. Background Art

[0002] With the continuous development of motor technology, Busbar components are widely used in the design of motors to improve the electrical performance and structural stability of motors. However, traditional motors with Busbar components have exposed some deficiencies in practical applications:

[0003] 1. High design complexity: The design of Busbar components usually requires additional space and connection points, resulting in a complex motor structure. Especially in small motors, the space occupied and the increased weight of Busbar components may affect the overall design compactness;

[0004] 2. High manufacturing cost: The manufacturing and assembly process of Busbar components is relatively complex, involving precision machining and multiple connection operations, increasing the production cost. At the same time, due to the high material and processing requirements of Busbar components, the overall cost is significantly increased;

[0005] 3. Limited heat dissipation performance: Although Busbar components contribute to current distribution, the complexity of their structure may lead to heat accumulation in local areas, increasing the difficulty of heat dissipation. In addition, the increase in connection points may also lead to resistance and heat accumulation, thereby affecting the overall performance and life of the motor;

[0006] 4. Reliability problems: The multi-level Busbar connection may increase the risk of electrical failures. Especially in high-vibration or high-temperature environments, the connection points of Busbar are prone to looseness or aging, reducing the reliability and durability of the motor. Summary of the Invention

[0007] The utility model provides a connection structure between a motor stator assembly and a printed circuit board assembly, which has a simple structure, omits the Busbar structure, thereby simplifying the manufacturing and assembly processes, improving the system stability, and reducing the cost; it solves the technical problems in the prior art that the connection in the motor structure through the Busbar component is complex in structure, high in manufacturing cost, and not good enough in reliability.

[0008] The above technical problems of the present utility model are solved by the following technical solutions: A connection structure between a motor stator assembly and a printed circuit board assembly, including a motor stator winding bracket, on which three-phase enameled wires are wound. The number of slots of the motor stator winding bracket is A, and the number of winding slots for each phase is B, where B = A / 3. The wire heads of each phase winding are wound in sequence. The wire head of the first-phase winding and the wire tail of the third-phase winding are connected together, the wire head of the second-phase winding and the wire tail of the first-phase winding are connected together, and the wire head of the third-phase winding and the wire tail of the second-phase winding are connected together to form the final UVW three-phase output terminals. Above the motor stator winding bracket, there is a stator end cover, on which there are guiding holes, and the three-phase output terminals extending from the stator end cover are fixed on the PCBA board. The three-phase terminals are directly wound by enameled wires, omitting the original Busbar component structure, greatly reducing the design and production complexity, simplifying the manufacturing and assembly processes, reducing the connection points, simplifying the electrical connection path, and thus reducing the probability of electrical failures. The terminals wound directly by enameled wires have better stability in high-vibration and high-temperature environments. Combining with the guiding and positioning function of the stator end cover, it further improves the reliability and durability of the motor.

[0009] The wire heads of each phase winding are wound in sequence. According to the number of slots, the winding pattern can be selected, but generally, it follows the pattern of cycling through the first phase, the second phase, and the third phase. For example, for a 12-slot stator, the first phase can be wound once first, then the second phase wound once, then the third phase wound once, and then the first phase again... Or the first phase can be continuously wound 2 times first, then the second phase also follows the same pattern and is continuously wound 2 times, then the third phase is continuously wound 2 times, and then the next round of sequential winding is carried out.

[0010] Preferably, the stator end cover is provided with guiding holes, and the stator end cover is connected to the motor stator winding bracket through buckles. Three guiding holes are designed on the stator end cover, providing accurate guiding and positioning functions for the enameled wire terminals. Through these guiding holes, the arrangement of the enameled wire terminals is more precise and stable, effectively avoiding assembly and electrical connection problems caused by inaccurate terminal positioning, and further improving the overall reliability of the motor.

[0011] Preferably, the guiding holes are long waist-shaped holes, and the buckles are evenly distributed on the stator end cover. It is convenient for the three-phase output terminals of the motor to pass through the PCBA board for fixation.

[0012] Preferably, PCBA three-phase connection terminals are welded on the PCBA board, and the PCBA three-phase connection terminals are connected to the UVW three-phase output terminals. The PCBA board is provided with wiring terminals welded on it and connected to the three-phase output terminals of the motor, without the high-precision requirements for the size and position required for the connection between conventional phase wire terminals and the PCB.

[0013] Preferably, the PCBA three-phase connection terminal includes a terminal base, on which a connection body is integrally formed. The connection body includes an elastic bending part connected to the terminal base. Above the elastic bending part, there is a connection body main body, and on each side of the connection body main body, there is an elastic connection piece, and the two elastic connection pieces are parallel to each other. After removing the paint film from the motor three-phase outgoing line terminals, they are directly welded to the elastic connection pieces by resistance welding.

[0014] Preferably, the number of slots of the winding bracket is 12, and each phase of enameled wire is in a 4-series winding structure, and each phase of enameled wire is wound with an interval of two winding slots.

[0015] Preferably, the number of slots of the winding bracket is 12, and each phase of enameled wire is first wound continuously for 2 winding slots, and each phase of enameled wire is wound with an interval of 4 winding slots.

[0016] Preferably, a waterproof end cover is provided above the stator end cover, and a thermal conductive adhesive is provided between the waterproof end cover and the PCBA. The waterproof end cover seals the internal coolant in the rotor, and at the same time transfers the heat on the PCBA to the waterproof end cover through the thermal conductive adhesive, and then is taken away by the coolant, so as to effectively dissipate the heat of the PCBA.

[0017] Therefore, the connection structure between a motor stator assembly and a printed circuit board assembly of the present utility model has the following advantages:

[0018] 1. Simplified design: The Busbar assembly is cancelled, and the three-phase terminals are directly wound by enameled wires. This not only reduces the number of components inside the motor, but also simplifies the manufacturing and assembly processes, and greatly reduces the design and production complexity;

[0019] 2. Reduced requirements for the position accuracy of the motor phase line terminals: The connection of the three-phase terminals is realized through the three-phase connection terminals on the PCBA board.

[0020] 3. Low cost: By cancelling the Busbar assembly, the dependence on high-precision machining and high-cost materials is reduced, and the production cost of the motor is significantly reduced. There is no need for additional installation and debugging links for the Busbar assembly, and the working hours and costs of manufacturing and assembly are also reduced;

[0021] 4. Improved heat dissipation performance: In the motor of the present utility model, since the Busbar assembly is omitted, the number of electrical connection points is reduced, and the accumulation of local heat is reduced. The direct winding design of the enameled wire contributes to the overall heat dissipation effect of the motor, extends the service life of the motor, and improves the operation stability under high load;

[0022] 5. Enhanced reliability: The present utility model simplifies the electrical connection path by reducing the connection points, thereby reducing the probability of electrical faults. Description of the Drawings

[0023] Figure 1 It is a perspective view of a connection structure between a motor stator assembly and a printed circuit board assembly.

[0024] Figure 2 It is a perspective view of the motor stator assembly.

[0025] Figure 3 It is Figure 1 The developed view after winding of the motor stator winding support of

[0026] Figure 4 It is Figure 1 The perspective view of the stator end cover of

[0027] Figure 5 It is Figure 1 The perspective view of the PCBA three-phase connection terminal in Specific embodiments

[0028] The technical solution of the utility model will be further specifically described below through embodiments in conjunction with the accompanying drawings.

[0029] Embodiment:

[0030] As Figure 1 and 2 and shown in FIGS. 3 and 4, a connection structure between a motor stator assembly and a printed circuit board assembly includes a circular motor stator winding support 4. Twelve winding grooves are provided on the motor stator winding support 4, and three-phase enameled wires are wound on the twelve winding grooves. The lead wire 8 of the first-phase winding, the lead wire 9 of the second-phase winding, and the lead wire 10 of the third-phase winding are respectively wound leftward from the first, third, and fifth winding grooves. The lead wire 8 of the first-phase winding is wound in the fourth winding groove after separating two grooves, the lead wire 9 of the second-phase winding is wound in the fifth winding groove after separating two grooves, and the lead wire 10 of the third-phase winding is wound in the seventh winding groove after separating two grooves. Then continue to wind in sequence, so that the lead wire 8 of the first-phase winding is connected in parallel with the tail wire 13 of the third-phase winding, the lead wire 9 of the second-phase winding is connected in parallel with the tail wire 11 of the first-phase winding, and the lead wire 10 of the third-phase winding is connected in parallel with the tail wire 12 of the second-phase winding, forming the final UVW three-phase output terminals 6. A stator end cover 3 is installed on the motor stator winding support 4. Three long waist-shaped guiding holes 14 are provided on the stator end cover 3. The UVW three-phase output terminals 6 extend out from the guiding holes 14 and are then welded to the three-phase connection terminals 5 on the PCBA board 1. A plurality of hooks 15 are evenly formed on the lower bottom surface of the stator end cover 3. A clamping groove 7 is provided on the motor stator winding support 4. The stator end cover 3 is fixed in the clamping groove 7 of the motor stator winding support through the hooks, thereby connecting the two. A waterproof end cover 2 is further installed below the PCBA board 1. The waterproof end cover 2 is the same size as the stator end cover 3. The waterproof end cover 2 is connected to the cooling structure inside the rotor. A heat-conducting adhesive is coated between the waterproof end cover 2 and the PCBA board 1.

[0031] As Figure 5 shown, the three-phase connection terminals on the PCBA board include a terminal base 18, on which a connecting body 17 is integrally formed. The connecting body includes an elastic bending part connected to the terminal base. Above the elastic bending part, there is a connecting body body, and on each side of the connecting body body, there is an elastic connecting piece 16, and the two elastic connecting pieces 16 are parallel to each other. After the paint of the UVW three-phase outgoing terminals 6 is removed, they extend into the middle of the two elastic connecting pieces 16 and are then welded together by resistance welding.

[0032] During assembly, the UVW three-phase terminals are directly connected to the PCBA board, omitting the busbar, and the assembly is simpler.

[0033] Embodiment 2:

[0034] Different from Embodiment 1, 12 winding slots are provided on the motor stator winding bracket 4, and three-phase enameled wires are wound on the 12 winding slots. The first-phase winding lead 8, the second-phase winding lead 9, and the third-phase winding lead 10 are respectively wound leftward from the first, third, and fifth winding slots. After the first-phase winding lead 8 winds two slots continuously, it winds after an interval of 4 slots and then winds two slots continuously to complete the winding of the first phase. Similarly, after the second-phase winding lead 9 winds the third and fourth slots continuously, it winds after an interval of 4 slots and then continues to wind two slots continuously to complete the winding of the second phase. After the second-phase winding lead 10 winds the fifth and sixth slots continuously, it winds after an interval of 4 slots and then continues to wind two slots continuously to complete the winding of the third phase. The first-phase winding lead 8 and the third-phase winding tail 13 are connected in parallel, the second-phase winding lead 9 and the first-phase winding tail 11 are connected in parallel, and the third-phase winding lead 10 and the second-phase winding tail 12 are connected in parallel to form the final UVW three-phase outgoing terminals 6.

[0035] The specific embodiments described herein are merely illustrative of the concept of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A connection structure between a motor stator assembly and a printed circuit board assembly, including a motor stator winding bracket around which three-phase enameled wires are wound, characterized in that: The number of slots of the motor stator winding bracket is A, the number of slots for each phase winding is B, and B = A / 3. The wire heads of each phase winding are sequentially wound and connected. The wire head of the first-phase winding is connected in parallel with the wire tail of the third-phase winding, the wire head of the second-phase winding is connected in parallel with the wire tail of the first-phase winding, and the wire head of the third-phase winding is connected in parallel with the wire tail of the second-phase winding to form the final three-phase outgoing terminals of UVW. A stator end cover is provided above the motor stator winding bracket, a guiding hole is provided on the stator end cover, and the three-phase outgoing terminals extending from the stator end cover are fixed on the PCBA board.

2. The connection structure between a motor stator assembly and a printed circuit board assembly according to claim 1, characterized in that: A guiding hole is provided on the stator end cover, and the stator end cover is connected to the motor stator winding bracket through a buckle.

3. The connection structure between a motor stator assembly and a printed circuit board assembly according to claim 2, wherein: The guiding hole is an oblong hole, and the buckles are evenly distributed on the stator end cover.

4. A connection structure between a motor stator assembly and a printed circuit board assembly according to claim 1 or 2 or 3, characterized in that: PCBA three-phase connection terminals are welded on the PCBA board, and the PCBA three-phase connection terminals are connected to the UVW three-phase outgoing terminals.

5. The connection structure between a motor stator assembly and a printed circuit board assembly according to claim 4, characterized in that: The PCBA three-phase connection terminals include a terminal base, and a connecting body is integrally formed on the terminal base. The connecting body includes an elastic bending part connected to the terminal base. Above the elastic bending part, there is a connecting body body, and each side of the connecting body body is provided with an elastic connecting piece, and the two elastic connecting pieces are parallel to each other.

6. The connection structure between a motor stator assembly and a printed circuit board assembly according to claim 1 or 2 or 3, characterized in that: The number of slots of the winding bracket is 12, and the enameled wire of each phase has a 4-connected winding structure, and the enameled wire of each phase is wound with an interval of two winding slots.

7. The connection structure between a motor stator assembly and a printed circuit board assembly according to claim 1 or 2 or 3, characterized in that: The number of slots of the winding bracket is 12, the enameled wire of each phase is first continuously wound for 2 winding slots, and the enameled wire of each phase is wound with an interval of 4 winding slots.

8. The connection structure between a motor stator assembly and a printed circuit board assembly according to claim 1 or 2 or 3, characterized in that: A waterproof end cover is provided above the stator end cover, and a thermal conductive adhesive is provided between the waterproof end cover and the PCBA.

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