Motor stator assembly and EC plastic package motor using same

Abstract

According to the motor stator assembly and the EC plastic package motor applying the same, the iron core of the plastic package motor is conducted with the controller through the iron core connecting piece, so that the induced voltage of the motor is balanced, and the EMC / EMI effect of the motor is improved; the iron core connecting pieces are matched with the first inserting grooves in the iron core single bodies, connection of the iron core connecting pieces can be rapidly achieved, the assembling process is simplified, and the production efficiency is improved; when the iron core assembly is bent and rolled into a circle, the orientation of the first inserting groove is changed to enable the groove wall to press the iron core connecting section, so that the looseness of the iron core connecting piece can be effectively prevented, the mechanical stability of the whole stator assembly is enhanced, and the long-term stable operation of the motor is facilitated; the insulating supports sleeved on the iron core single bodies and the varnished wires wound on the insulating supports ensure ordered arrangement of the varnished wires through the wire embedding grooves, so that eddy current loss is reduced, and the working efficiency and the electromagnetic performance of the motor are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a motor stator assembly and an EC plastic-sealed motor using the same. Background Art

[0002] As the concept of environmental protection and energy saving becomes more popular in society, and the national standard for the energy efficiency of motors is improved, more and more users are proposing to replace AC metal shell motors with EC input plastic-sealed DC motors because the EC input plastic-sealed DC motor integrates the motor controller with the plastic-sealed stand-alone machine, has a small overall size, is convenient for customers to install, and has high motor energy efficiency.

[0003] However, there are still some problems with the current EC input plastic-sealed DC motors. The motor controller is integrated into the single machine, and the electrical components on the controller are disturbed by the induced voltage generated by the stator core during the operation of the motor. At the same time, the shell of the plastic-sealed DC motor is made of insulating material BMC material, and the induced voltage cannot be balanced through the controller and the core channel, thus affecting the EMC / EMI effect of the electronic control solution.

[0004] The present invention is made based on the above situation. Summary of the invention

[0005] The present invention overcomes the shortcomings of the prior art and provides a motor stator assembly capable of connecting an iron core with a controller through an iron core connector so as to balance the induced voltage, and an EC plastic-sealed motor using the same.

[0006] The present invention is achieved through the following technical solutions:

[0007] A motor stator assembly comprises an iron core assembly and an iron core connector for conductively connecting the iron core assembly to a motor control box, the iron core connector comprising an iron core connecting section and an end plate connecting section, the iron core assembly is composed of a plurality of iron core monomers connected end to end, an insulating bracket is sleeved on the iron core monomer, the iron core monomer comprises a yoke and a tooth portion extending from the inner side of the yoke, a wire embedding groove is provided at a position corresponding to the tooth portion on the insulating bracket, an enameled wire is wound on the insulating bracket, the enameled wire is embedded in the wire embedding groove, an avoidance opening for providing space for the iron core assembly to be rolled up is provided between two adjacent yokes, wherein the side walls of the yoke on both sides of one or more of the avoidance openings are provided with a first plug-in groove for inserting the iron core connecting section, the iron core assembly is bent from a straight long strip into a circle, and the two ends of the head end are connected together, thereby changing the direction of the first plug-in groove so that the groove wall of the first plug-in groove presses the iron core connecting section.

[0008] In the motor stator assembly as described above, the insulating bracket includes a shielding portion capable of shielding the upper and lower sides of the yoke portion and a sleeve portion connected to the inner side of the shielding portion and sleeved on the tooth portion, and the wire embedding groove is provided on the sleeve portion.

[0009] In a motor stator assembly as described above, a second plug-in slot is provided at the position of the shielding portion corresponding to the first plug-in slot, and the core connector also includes a connecting and fixing section, the head end of the connecting and fixing section is connected to the core connecting section, and the tail end of the core connecting section is connected to the end plate connecting section. When the core assembly is bent from a straight strip into a circle, the connecting and fixing section is pressed by the slot wall of the second plug-in slot due to the change in the orientation of the second plug-in slot.

[0010] In the motor stator assembly as described above, the end plate connecting section is in the shape of a hollow cylinder.

[0011] In the motor stator assembly as described above, a transition section is provided between the end plate connecting section and the connecting and fixing section to connect the end plate connecting section to the connecting and fixing section. The core connecting section, the connecting and fixing section, the transition section and the end plate connecting section are an integrated structure.

[0012] The motor stator assembly as described above further comprises pins conductively connected to the enameled wires, wherein one or more of the insulating brackets are provided with sockets for connecting the pins.

[0013] A motor stator assembly as described above, the stator assembly also includes an end plate that can further fix the pins and the core connector, the end plate is provided with an outlet hole for the pins to pass through, and the end plate is also provided with a plug-in column for the end plate connecting section to be inserted, and the end of the plug-in column is provided with a mounting hole for the conductive part on the power supply control box to be inserted and abutted on the end plate connecting section.

[0014] The motor stator assembly as described above further comprises a shell formed by overmolding the stator assembly with insulating material, and the mounting holes and pins are exposed from the shell.

[0015] An EC plastic-sealed motor comprises a stator assembly, a rotor assembly, a rotating shaft and a control box, wherein the rotor assembly is arranged inside the stator assembly, the stator assembly is the motor stator assembly described in the claim, and the control box is provided with a conductive screw for mounting it on a housing, the conductive screw is threadedly connected to the mounting hole and abuts against the end plate connecting section.

[0016] In the EC plastic-encapsulated motor as described above, the insulating material includes BMC material.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] In this case, the core of the plastic-encapsulated motor is connected to the controller through the core connector, so as to balance the induced voltage of the motor and improve the EMC / EMI effect of the motor. By using the core connector to cooperate with the first plug-in slot on the core monomer, the connection of the core connector can be quickly realized, which simplifies the assembly process and improves production efficiency. When the core assembly is bent into a circle, the direction of the first plug-in slot is changed to make the slot wall press the core connection section, which can effectively prevent the loosening of the core connector, enhance the mechanical stability of the entire stator assembly, and contribute to the long-term stable operation of the motor. The insulating bracket sleeved on the core monomer and the enameled wire wound thereon ensure the orderly arrangement of the enameled wire through the wire embedding groove, which is conducive to reducing eddy current loss and improving the working efficiency and electromagnetic performance of the motor. In this case, the size and shape of the core assembly can be adjusted according to actual needs to meet the needs of motors of different specifications and power levels, increasing the flexibility and market competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 It is a schematic diagram of the structure of the present invention after the end plate is separated;

[0021] Figure 2 It is a schematic diagram of the structure of the present invention;

[0022] Figure 3 It is a schematic structural diagram of the stator assembly in the present invention when it is in a straight strip shape;

[0023] Figure 4 It is a structural schematic diagram of the core connector in the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the insulating bracket in the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the pins in the present invention;

[0026] Figure 7 It is a structural schematic diagram of the motor in the present invention;

[0027] Figure 8 It is a cross-sectional schematic diagram of the motor in the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings:

[0029] like Figures 1 to 8The motor stator assembly and the EC plastic-sealed motor using the same as shown in the figure include an iron core assembly 1 and an iron core connector 2 for conductively connecting the iron core assembly 1 to the motor control box 73, the iron core connector 2 includes an iron core connecting section 21 and an end plate connecting section 22, the iron core assembly 1 is composed of a plurality of iron core monomers 11 connected end to end, an insulating bracket 3 is sleeved on the iron core monomer 11, the iron core monomer 11 includes a yoke 111 and a tooth 112 extending from the inner side of the yoke 111, and a wire embedding groove is provided on the insulating bracket 3 at a position corresponding to the tooth 112 30, the insulating bracket 3 is wound with an enameled wire 4, the enameled wire 4 is embedded in the wire embedding groove 30, and a avoidance opening 10 for providing space for the iron core assembly 1 to be rolled is provided between two adjacent yokes 111, wherein the side walls of the yokes 111 on both sides of one or more of the avoidance openings 10 are provided with a first plug-in slot 1111 for inserting the iron core connecting section 21, the iron core assembly 1 is bent from a straight strip into a circle, and the two ends are connected together, thereby changing the direction of the first plug-in slot 1111 so that the slot wall of the first plug-in slot 1111 presses the iron core connecting section 21. Among them, the iron core assembly after rolling is welded at the head and tail to maintain the circle, or maintained in the circle by other structural connections.

[0030] In this case, the core of the plastic-encapsulated motor is connected to the controller through the core connector 2, so as to balance the induced voltage of the motor and improve the EMC / EMI effect of the motor. By using the core connector 2 to cooperate with the first plug-in slot 1111 on the core monomer 11, the connection of the core connector 2 can be quickly realized, which simplifies the assembly process and improves production efficiency. When the core assembly is bent into a circle, the direction of the first plug-in slot 1111 is changed to make the slot wall press the core connection section 21, which can effectively prevent the loosening of the core connector 2, enhance the mechanical stability of the entire stator assembly, and contribute to the long-term stable operation of the motor. The insulating bracket 3 sleeved on the core monomer 11 and the enameled wire 4 wound thereon ensure the orderly arrangement of the enameled wire 4 through the wire embedding groove 30, which is conducive to reducing eddy current loss and improving the working efficiency and electromagnetic performance of the motor. In this case, the size and shape of the core assembly can be adjusted according to actual needs to meet the needs of motors of different specifications and power levels, increasing the flexibility and market competitiveness of the product.

[0031] Specifically, the insulating bracket 3 includes a shielding portion 31 capable of shielding the upper and lower sides of the yoke 111 and a sleeve portion 32 connected to the inner side of the shielding portion 31 and sleeved on the tooth portion 112 , and the wire embedding groove 30 is provided on the sleeve portion 32 .

[0032] The shielding portion 31 can effectively shield the upper and lower sides of the yoke 111 of the core monomer 11, avoiding the short circuit phenomenon that may be caused by direct contact between the enameled wire 4 and the core, greatly improving the safety and reliability of the motor. The shielding portion 31 can form a certain air gap, which helps to dissipate the heat generated during the operation of the motor, improve the thermal performance of the motor, and extend the service life of the motor. The wire embedding groove 30 is arranged on the sleeve portion 32, which ensures the orderly arrangement of the enameled wire 4, reduces mutual interference between coils, and improves the electromagnetic performance of the motor. At the same time, it is also beneficial to increase the filling rate of the coil and further improve the working efficiency of the motor.

[0033] Furthermore, the shielding portion 31 is provided with a second plug-in slot 311 at a position corresponding to the first plug-in slot 1111, and the core connector 2 also includes a connecting and fixing section 23, the head end of which is connected to the core connector 21, and the tail end of the core connector 21 is connected to the end plate connector 22. When the core assembly 1 is bent from a straight strip into a circle, the connecting and fixing section 23 is pressed by the groove wall of the second plug-in slot 311 due to the change in the orientation of the second plug-in slot 311, thereby further pressing the core connector 2 and limiting its loosening. In one embodiment, the shielding portion 31 can be thickened at the second plug-in slot 311 to increase the friction and make the structure more stable.

[0034] In one embodiment, the core connecting segment 21 and the connecting and fixing segment 23 are bent following the curling of the stator assembly, thereby forming a tight connection with the core to achieve a reliable conduction result.

[0035] In one embodiment, a transition section 24 is provided between the end plate connection section 22 and the connection and fixing section 23 to connect the end plate connection section 22 to the connection and fixing section 23. The core connection section 21, the connection and fixing section 23, the transition section 24, and the end plate connection section 22 are an integrated structure. The core connector 2 is formed by bending a plate, which eliminates the connection points between the various components, reduces potential weak links, and improves the strength and rigidity of the overall structure. During the operation of the motor, it can better resist vibration and impact and extend the service life of the motor. The integrated design reduces the number of parts required for assembly, reduces the complexity of assembly, reduces the assembly steps, improves production efficiency, and reduces production costs. It avoids the cumulative error caused by multiple assemblies, reduces contact resistance, improves the efficiency of current transmission, reduces energy loss, helps reduce electromagnetic interference, and improves the electromagnetic compatibility of the motor.

[0036] In one embodiment, the stator assembly further comprises a pin 5 conductively connected to the enameled wire 4, wherein one or more of the insulating brackets 3 are provided with a socket 33 for connecting the pin 5. The socket 33 is provided with a mounting groove, and the pin 5 is inserted into the mounting groove.

[0037] In one embodiment, the end plate connection section 22 is a hollow column formed by bending a plate. The stator assembly also includes an end plate 6 that can further fix the pin 5 and the core connector 2. The end plate 6 is provided with a through hole 61 for the pin 5 to pass through. The end plate 6 is also provided with a plug-in column 62 for the end plate connection section 22 to be inserted. The end of the plug-in column 62 is provided with a mounting hole 621 for the conductive member on the power supply control box 73 to be inserted and abutted on the end plate connection section 22. Among them, the mounting hole 621 can be a threaded hole, and the conductive member can be a conductive screw, a conductive pin, a conductive wire, etc. The core is connected to the conductive screw through the core connector 2 so that the core is connected to the control box 73, thereby balancing the induced voltage of the motor, thereby improving the EMC / EMI effect of the motor.

[0038] The motor stator assembly further includes a housing 71 formed by overmolding an insulating material on the stator assembly. The mounting holes 621 and the pins 5 are exposed from the housing 71 , thereby facilitating electrical connection with the control box 73 .

[0039] In one embodiment, the present case also provides an EC plastic-encapsulated motor, which includes a housing 71, a stator assembly, a rotor assembly 74, a rotating shaft 72 and a control box 73. The stator assembly and the rotor assembly 74 are both installed in the housing 71. The stator assembly is the motor stator assembly described in the above embodiment. The control box 73 is provided with a conductive screw 75 for mounting it on the housing 71. The conductive screw 75 is threadedly connected to the mounting hole 621 and abuts against the end plate connecting section 22, thereby balancing the induced voltage of the motor and improving the EMC / EMI effect of the motor. The housing of the control box 73 is made of a conductive metal material.

[0040] In one embodiment, the insulating material includes BMC material, and may also be other insulating plastics.

Claims

1. A motor stator assembly, characterized in that: The invention comprises an iron core assembly (1) and an iron core connector (2) for conductively connecting the iron core assembly (1) to a motor control box, wherein the iron core connector (2) comprises an iron core connecting section (21) and an end plate connecting section (22), the iron core assembly (1) is composed of a plurality of iron core monomers (11) connected end to end, an insulating bracket (3) is sleeved on the iron core monomer (11), the iron core monomer (11) comprises a yoke (111) and a tooth (112) extending from the inner side of the yoke (111), a wire embedding groove (30) is provided on the insulating bracket (3) at a position corresponding to the tooth (112), and the insulating bracket (3) An enameled wire (4) is wound on the surface, and the enameled wire (4) is embedded in the wire embedding groove (30). An escape opening (10) for providing space for the iron core assembly (1) to be rolled is provided between two adjacent yokes (111), wherein the side walls of the yokes (111) on both sides of one or more of the escape openings (10) are provided with a first plug-in groove (1111) for inserting the iron core connecting section (21), so that the iron core assembly (1) is bent from a straight strip into a circle, and the two ends of the head are connected together, thereby changing the direction of the first plug-in groove (1111) so that the groove wall of the first plug-in groove (1111) presses the iron core connecting section (21).

2. The motor stator assembly according to claim 1, characterized in that: The insulating bracket (3) comprises a shielding portion (31) capable of shielding the upper and lower sides of the yoke (111) and a sleeve portion (32) connected to the inner side of the shielding portion (31) and sleeved on the tooth portion (112), and the wire embedding groove (30) is provided on the sleeve portion (32).

3. A motor stator assembly according to claim 2, characterized in that: The shielding portion (31) is provided with a second plug-in slot (311) at a position corresponding to the first plug-in slot (1111), and the core connector (2) further comprises a connecting and fixing section (23), the head end of the connecting and fixing section (23) is connected to the core connecting section (21), and the tail end of the core connecting section (21) is connected to the end plate connecting section (22); when the core assembly (1) is bent from a straight strip into a circle, the connecting and fixing section (23) is pressed by the slot wall of the second plug-in slot (311) due to the change in the orientation of the second plug-in slot (311).

4. A motor stator assembly according to claim 3, characterized in that: The end plate connecting section (22) is in the shape of a hollow cylinder.

5. The motor stator assembly according to claim 4, characterized in that: A transition section (24) is also provided between the end plate connection section (22) and the connection fixing section (23) to connect the end plate connection section (22) to the connection fixing section (23); the core connection section (21), the connection fixing section (23), the transition section (24) and the end plate connection section (22) are an integrated structure.

6. A motor stator assembly according to claims 1-5, characterized in that: The stator assembly also includes a pin (5) conductively connected to the enameled wire (4), wherein one or more of the insulating brackets (3) are provided with a socket (33) for connecting the pin (5).

7. The motor stator assembly according to claim 6, characterized in that: The stator assembly further comprises an end plate (6) capable of further fixing the pin (5) and the core connector (2); the end plate (6) is provided with an outlet hole (61) for the pin (5) to pass through; the end plate (6) is also provided with a plug-in column (62) for the end plate connecting section (22) to be inserted; the end of the plug-in column (62) is provided with a mounting hole (621) for inserting a conductive member on the power supply control box and abutting against the end plate connecting section (22).

8. The motor stator assembly according to claim 7, characterized in that: It also includes a shell (71) formed by overmolding an insulating material on the stator assembly, and the mounting hole (621) and the pin (5) are exposed from the shell (71).

9. An EC plastic-encapsulated motor, comprising a stator assembly, a rotor assembly (74), a rotating shaft (72) and a control box (73), wherein the rotor assembly (74) is arranged inside the stator assembly, and characterized in that The stator assembly is the motor stator assembly as claimed in claim 8, and the control box (73) is provided with a conductive screw (75) for mounting it on the housing (71), and the conductive screw (75) is threadedly connected to the mounting hole (621) and abuts against the end plate connecting section (22).

10. The EC plastic-encapsulated motor according to claim 9, characterized in that: The insulating material includes a BMC material.

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