Motor skeleton, motor and electrical equipment
By electrically connecting the PGND terminals to the iron core in the motor skeleton, the problem of insufficient anti-interference ability of the motor EMC is solved, and more efficient electromagnetic compatibility is achieved, reducing costs and labor consumption.
Patent Information
- Application Number
- CN201910758781.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-08-16
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2039-08-16
AI Technical Summary
The EMC anti-interference ability of existing motors is not strong, resulting in a large number of unqualified EMC tests. Traditional improvement methods such as adding or changing electronic components and adding magnetic rings are not effective.
Design a motor skeleton, in which two skeletons are arranged opposite to each other at both ends of the iron core, and the PGND terminal is electrically connected to the iron core through the first wiring structure to form an internal interference signal consumption path to avoid the release of interference signals to the outside, thereby improving EMC resistance Interference capability.
By electrically connecting the PGND terminals to the iron core, the anti-interference capability of EMC is effectively improved, the demand for circuit board layout and component improvement is reduced, production efficiency is improved, and motor cost is reduced.
Smart Images
Figure CN110474488B_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of motor technology, and in particular to a motor frame, a motor and an electrical device. Background Art
[0002] Motors have been widely used in electrical equipment such as air conditioners, dehumidifiers, heaters, and air purifiers.
[0003] In the related art, some motors are equipped with controllers, which can play the role of information detection, feedback, logic processing, control, drive, etc. Generally, there are strict national standards for the electromagnetic compatibility (EMC) of electrical equipment. For motors equipped with controllers, different controller setting schemes have different effects on the EMC test results of the motor load. During the test, the number of motors with controllers that fail the EMC test is relatively large. Even if improvements can be made from the aspects of circuit board layout, adding or changing electronic components, adding magnetic rings, etc., the results are not good and the EMC anti-interference ability is not strong. Summary of the invention
[0004] The purpose of this application is to provide a motor frame, a motor and an electrical device to solve the problem of weak EMC anti-interference ability of the motor in the related art.
[0005] The purpose of this application is achieved through the following technical solutions:
[0006] A motor skeleton is used in a motor, wherein the motor comprises an iron core and a controller, and the controller has a PGND terminal;
[0007] The motor frame includes two frames arranged opposite to each other at two ends of the iron core;
[0008] One of the two frames is provided with a first wiring structure;
[0009] The first wiring structure is used to electrically connect the PGND terminal to the iron core.
[0010] Optionally, the first wiring structure includes a wiring piece and a mounting hole matched with the wiring piece;
[0011] The mounting holes are provided on the frame;
[0012] The connecting piece is installed in the installation hole and is used to electrically connect the PGND terminal to the iron core.
[0013] Optionally, the wiring piece includes a first section, a second section, and a third section;
[0014] The first section is located at a side of the mounting hole away from the iron core and is used to be connected to the PGND terminal;
[0015] The second section is located in the mounting hole and is used to install and fix the wiring piece;
[0016] The third section is located at a side of the mounting hole close to the iron core and is used for conducting contact with the iron core.
[0017] Optionally, a buckle is provided on one side of the second section close to the third section; the buckle abuts against the hole wall of the mounting hole to fix the wiring piece.
[0018] Optionally, the width of the third section is greater than the widths of the first section and the second section;
[0019] The connecting piece is inserted through the installation hole close to the side of the iron core, and when installed in place, it is fixed by the third section.
[0020] Optionally, the width of the first segment is smaller than the width of the second segment and the width of the third segment.
[0021] Optionally, the third section protrudes from the mounting hole.
[0022] Optionally, the thickness of the third section is greater than the thickness of the second section and the thickness of the first section respectively.
[0023] Optionally, the first segment and the second segment are arranged along the same straight line, and the third segment intersects the first segment and the second segment respectively.
[0024] Optionally, the wiring lug is a T-shaped wiring lug, and the mounting hole is a T-shaped mounting hole;
[0025] Alternatively, the wiring lug is an L-shaped wiring lug, and the mounting hole is an L-shaped mounting hole.
[0026] Optionally, the skeleton is a ring-shaped skeleton;
[0027] The mounting hole is arranged along the axial direction of the frame.
[0028] Optionally, the frame provided with the first wiring structure is also provided with a second wiring structure;
[0029] The second wiring structure is used to connect the phase line of the motor.
[0030] A motor comprises an iron core and a controller, wherein the controller has a PGND terminal; the motor also comprises a motor skeleton as described in any one of the above items.
[0031] An electrical device comprises the motor as described above.
[0032] Optionally, the electrical device is an air conditioner, a heater, a fan, a range hood or an air purifier.
[0033] This application adopts the above technical solution, which has the following beneficial effects:
[0034] Generally, a motor includes an iron core and a controller. The controller has a PGND terminal. The PGND terminal is a protective ground and is generally connected to the casing of the motor. Based on this, a new motor skeleton is provided in the scheme of the present application. The motor skeleton includes two skeletons. The two skeletons are relatively arranged at the two ends of the iron core, and the iron core is clamped in the middle. A first wiring structure is added to one of the two skeletons. Through the first wiring structure, the PGND terminal can be electrically connected to the iron core of the motor instead of being connected to the casing of the motor. In this way, the iron core acts as the ground, thereby reliably introducing the interference signal in the controller into the iron core, realizing internal consumption instead of releasing it to the outside, avoiding electromagnetic interference with the outside world, and improving EMC anti-interference capability. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] In order to more clearly illustrate the embodiments of the present application 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 some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0036] Figure 1 It is a structural schematic diagram of a motor skeleton provided in one embodiment of the present application.
[0037] Figure 2 It is a schematic diagram of the decomposed structure of a motor skeleton provided in one embodiment of the present application.
[0038] Figure 3 This is a schematic diagram of a circuit connection structure provided by an embodiment of the present application.
[0039] Figure 4 Another embodiment of the present application provides Figure 1 The area indicated by the first dotted line frame is a schematic cross-sectional view of the first wiring structure along the AA′ direction.
[0040] Figure 5 Another embodiment of the present application provides Figure 4 A schematic structural diagram of the mounting hole of the first wiring structure.
[0041] Figure 6 It is a structural schematic diagram of a wiring piece in a first wiring structure provided in another embodiment of the present application.
[0042] Figure 7 Another embodiment of the present application provides Figure 1 The area indicated by the second dotted line frame is a schematic cross-sectional view of the second wiring structure along the BB' direction.
[0043] Figure 8 Another embodiment of the present application provides Figure 7 Schematic diagram of the structure of the installation slot of the second wiring structure. DETAILED DESCRIPTION
[0044] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other implementation methods obtained by ordinary technicians in the field without creative work belong to the scope of protection of the present application.
[0045] Example
[0046] See also Figure 1 , Figure 1 It is a structural schematic diagram of a motor skeleton provided in one embodiment of the present application.
[0047] See also Figure 2 , Figure 2 It is a schematic diagram of the decomposed structure of a motor skeleton provided in one embodiment of the present application.
[0048] See also Figure 3 , Figure 3 This is a schematic diagram of a circuit connection structure provided by an embodiment of the present application.
[0049] like Figure 1 , Figure 2 , Figure 3 As shown, this embodiment provides a motor skeleton, which is applied to a motor. The motor includes an iron core 1 and a controller 2. The controller 2 has a PGND terminal 21.
[0050] The motor frame includes two frames 3 arranged at two ends of the iron core 1 opposite to each other;
[0051] One of the two frames 3 is provided with a first wiring structure 4;
[0052] The first wiring structure 4 is used to electrically connect the PGND terminal 21 to the iron core 1 .
[0053] During implementation, the two skeletons 3 can be relatively clamped, the iron core 1 can be clamped in the middle, and then the wires are wound on the two skeletons 3. For details, please refer to the relevant technology, which will not be repeated here.
[0054] The motor may be a DC motor, such as a brushless DC motor.
[0055] The above motor can also be a plastic-encapsulated motor.
[0056] Since the motor includes an iron core and a controller, the controller has a PGND terminal, and the PGND terminal is a protective ground, which is generally connected to the casing of the motor. Based on this, in the scheme of the present application, a new motor skeleton is provided, which includes two skeletons, and the two skeletons are relatively arranged at the two ends of the iron core, and the iron core is clamped in the middle. A first wiring structure is added to one of the two skeletons, and the PGND terminal can be electrically connected to the iron core of the motor through the first wiring structure, instead of being connected to the casing of the motor. In this way, the iron core acts as the ground, thereby reliably introducing the interference signal in the controller into the iron core, realizing internal consumption instead of releasing it to the outside, avoiding electromagnetic interference with the outside world, and improving EMC anti-interference capability.
[0057] Generally, a Y capacitor is set in the controller to achieve anti-interference, and the PGND terminal is connected to one end of the Y capacitor. By connecting the PGND terminal to the iron core, a loop with extremely low impedance between the Y capacitor and the iron core can be provided, thereby reliably introducing the interference signal into the iron core and forming a self-loop, thereby improving the EMC anti-interference capability.
[0058] In addition, since this simple wiring structure improves the EMC anti-interference ability, it reduces the investment in circuit board layout, adding or changing electronic components, adding magnetic rings, etc., which greatly improves production efficiency, reduces manpower consumption, and reduces motor costs.
[0059] See also Figure 4 , Figure 4 Another embodiment of the present application provides Figure 1 The area indicated by the first dotted line frame 40 is a schematic cross-sectional view of the first wiring structure along the AA′ direction.
[0060] See also Figure 5 , Figure 5 Another embodiment of the present application provides Figure 4 A schematic structural diagram of the mounting hole of the first wiring structure.
[0061] See also Figure 6 , Figure 6 It is a structural schematic diagram of a wiring piece in a first wiring structure provided in another embodiment of the present application.
[0062] Due to the particularity of the core structure, most of them are smooth surfaces without wiring terminals, and it is difficult for the PGND terminal of the controller to be electrically connected to the core. To solve this problem, the inventors provide the following solution: Figure 1 , Figure 4 , Figure 5 , Figure 6 As shown, the first wiring structure 4 includes a wiring piece 41 and a mounting hole 42 matched with the wiring piece; the mounting hole is provided on the frame 3; the wiring piece 41 is installed in the mounting hole 42, and is used to electrically connect the PGND terminal 21 with the iron core 1. The shape of the mounting hole is consistent with the shape of the wiring piece. In this way, the mounting hole is provided on the frame structure, and the wiring piece is installed in the mounting hole. The wiring piece can electrically connect the PGND terminal to the iron core sandwiched between the two frames through the mounting hole.
[0063] There are many specific structures of the above-mentioned wiring piece. In some embodiments, Figure 4 , Figure 5 , Figure 6 As shown, the specific structure of the connecting piece includes a first section 411, a second section 412, and a third section 413; the first section 411 is located on the side of the mounting hole 42 away from the iron core 1, and is used to connect with the PGND terminal 21; the second section 412 is located in the mounting hole 42, and is used to install and fix the connecting piece 41; the third section 413 is located on the side of the mounting hole 42 close to the iron core 1, and is used to make conductive contact with the iron core 1. Similarly, due to the particularity of the iron core structure, in order to facilitate electrical connection, in this embodiment, the connecting piece is electrically connected by contact, and then installed and fixed to ensure good contact.
[0064] In order to increase the stability of installation and prevent the terminal from falling out of the installation hole, Figure 4 , Figure 6 As shown, a buckle 414 is provided on one side of the second section 412 close to the third section 413 ; the buckle 414 abuts against the hole wall of the mounting hole 42 to fix the wiring piece 41 . Figure 6 The state of the buckle 414 is shown in the unmounted state. When installing, the wiring piece is inserted from the side of the mounting hole close to the core. When installed in place, the wiring piece abuts against the hole wall of the mounting hole, thereby achieving fixed installation and preventing it from falling off. The first wiring structure provided in this embodiment is simple in design and easy to install.
[0065] In some embodiments, the width of the third section 413 is greater than the width of the first section 411 and the width of the second section 412; the connecting piece 41 is inserted through the mounting hole 42 close to the side of the iron core 1, and when installed in place, it is limited and fixed by the third section 413. Figure 6 As shown, the direction CC' is the direction of the width of the lug. Since the mounting hole is matched with the lug and the two have the same shape, after the lug is installed in place, it is restricted by the width of the third section and cannot be inserted further, thus playing a role of limiting and fixing, avoiding excessive insertion, the lug coming out of the mounting hole, and being unable to make conductive contact with the iron core.
[0066] In order to further ensure good conductive contact between the connecting piece and the iron core, the third section 413 protrudes from the mounting hole 42. The protruding third section 413 of the connecting piece can ensure that the connecting piece 41 can fully contact with the iron core 1.
[0067] It can be understood that the larger the contact area between the terminal lug and the iron core, the better the contact. In order to increase the contact area between the terminal lug and the iron core, there are various specific structures of the terminal lug. For example, the thickness of the third section 413 can be greater than the thickness of the second section 412 and the thickness of the first section 411. In this way, the contact area between the terminal lug 41 and the iron core 1 is increased by increasing the thickness of the third section 413.
[0068] Since the first section 411 is used to connect to the PGND terminal 21, for the convenience of connection, the width of the first section 411 can be smaller than the width of the second section 412 and the width of the third section 413, respectively. In this way, by refining the first section 411, it is convenient to connect to the PGND terminal 21 through a wire.
[0069] In some embodiments, the first section 411 and the second section 412 are arranged along the same straight line, and the third section 413 intersects with the first section 411 and the second section 412 respectively. That is to say, the first section 411 and the second section 412 are on the same line. In this way, they can be smoothly inserted into the mounting hole. The third section 413 intersects with the straight line where the first section 411 and the second section 412 are located, so that after being inserted into the mounting hole to a certain extent, the main limit can be achieved.
[0070] In implementation, the third section 413 may be perpendicular to the first section 411 and the second section 412. For example, the terminal lug may be, but is not limited to, a T-shaped terminal lug or an L-shaped terminal lug. Accordingly, the shape of the mounting hole is consistent with the shape of the terminal lug, and the mounting hole may be a T-shaped mounting hole or an L-shaped mounting hole. Figure 5 The T-shaped mounting hole is used as an illustration. Figure 1 , Figure 4 , Figure 6 A T-shaped lug is used as an illustration.
[0071] Generally, such as Figure 1 and Figure 2 As shown, the above-mentioned skeleton is an annular skeleton, and the space in the axial direction of the skeleton is larger. Then, the above-mentioned mounting holes can be arranged along the axial direction of the skeleton. Accordingly, the wiring pieces are inserted into the mounting holes along the axial direction, which is more convenient to arrange.
[0072] It is understandable that the motor also has three-phase lines U, W, and V, and a second wiring structure can also be provided on the frame provided with the first wiring structure; the second wiring structure is used to connect the phase lines of the motor. The first wiring structure and the second wiring structure are both provided on the same frame, and the frame without the wiring structure can be used as a frame close to the circuit board where the motor is fixed, so as to facilitate fixing.
[0073] See also Figure 7 , Figure 7 Another embodiment of the present application provides Figure 1 The area indicated by the second dotted line frame 50 is a schematic cross-sectional view of the second wiring structure along the BB' direction.
[0074] See also Figure 8 , Figure 8 Another embodiment of the present application provides Figure 7 Schematic diagram of the structure of the installation slot of the second wiring structure.
[0075] like Figure 1 , Figure 7 and Figure 8 As shown, the second wiring structure includes a terminal lug 51 for connecting the phase line and a mounting groove 52 for mounting the terminal lug. Since the phase line is not connected to the iron core, the mounting groove 52 is different from the mounting hole in the first wiring structure. The mounting hole passes through the frame and extends to the iron core side, while the mounting groove does not pass through the frame.
[0076] Based on the same concept, another embodiment of the present application further provides a motor, the motor includes an iron core and a controller, the controller has a PGND terminal; the motor also includes a motor frame as in any of the above embodiments.
[0077] The specific implementation scheme of the motor provided in the embodiment of the present application can refer to the implementation scheme of the motor frame in any of the above examples, which will not be repeated here.
[0078] Based on the same concept, another embodiment of the present application further provides an electrical device, including a motor as in any of the above embodiments.
[0079] Optionally, the above-mentioned electrical equipment may be, but is not limited to, an air conditioner, a heater, a fan, a range hood or an air purifier.
[0080] The specific implementation scheme of the electrical equipment provided in the embodiments of the present application can refer to the implementation scheme of the motor skeleton in any of the above examples, which will not be repeated here.
[0081] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.
[0082] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" refers to at least two.
[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0084] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A motor frame, characterized in that: Applied in a motor, the motor comprises an iron core and a controller, and the controller has a PGND terminal; The motor frame includes two frames arranged opposite to each other at two ends of the iron core; One of the two frames is provided with a first wiring structure; The first wiring structure is used to electrically connect the PGND terminal to the iron core; The first wiring structure includes a wiring piece and a mounting hole matched with the wiring piece; The mounting holes are provided on the frame; The wiring piece is installed in the mounting hole and is used to electrically connect the PGND terminal to the iron core; The connecting piece includes a first section, a second section, and a third section; The first section is located at a side of the mounting hole away from the iron core and is used to be connected to the PGND terminal; The second section is located in the mounting hole and is used to install and fix the wiring piece; The third section is located at a side of the mounting hole close to the iron core and is used for conducting contact with the iron core; A buckle is provided on one side of the second section close to the third section; the buckle abuts against the hole wall of the mounting hole to fix the wiring piece; The width of the third section is greater than that of the first section and the second section; the connecting piece is inserted through the mounting hole close to the side of the iron core, and when installed in place, it is limited and fixed by the third section.
2. The motor frame according to claim 1, characterized in that: The width of the first segment is smaller than the width of the second segment and the width of the third segment, respectively.
3. The motor frame according to claim 1, characterized in that: The third section protrudes from the mounting hole.
4. The motor frame according to claim 1, characterized in that: The thickness of the third section is greater than the thickness of the second section and the thickness of the first section.
5. The motor frame according to any one of claims 1 to 4, characterized in that: The first section and the second section are arranged along the same straight line, and the third section intersects the first section and the second section respectively.
6. The motor frame according to claim 5, characterized in that: The wiring lug is a T-shaped wiring lug, and the mounting hole is a T-shaped mounting hole; Alternatively, the wiring lug is an L-shaped wiring lug, and the mounting hole is an L-shaped mounting hole.
7. The motor frame according to claim 1, characterized in that: The skeleton is a ring-shaped skeleton; The mounting hole is arranged along the axial direction of the frame.
8. The motor frame according to claim 1, characterized in that: A second wiring structure is also provided on the frame provided with the first wiring structure; The second wiring structure is used to connect the phase line of the motor.
9. A motor, characterized in that: The motor includes an iron core and a controller, wherein the controller has a PGND terminal; the motor also includes a motor frame as described in any one of claims 1 to 8.
10. An electrical device, characterized in that: Comprising the motor as claimed in claim 9.
11. The electrical device according to claim 10, characterized in that: The electrical equipment is an air conditioner, a heater, a fan, a range hood or an air purifier.