Induction heating device

Abstract

The utility model discloses an induction heating device, and relates to the technical field of motors. The induction heating device is provided with an induction heating cavity and comprises an induction heating assembly and a second rotary clamping assembly which are arranged in the induction heating cavity; the second rotary clamping assembly is used for clamping the motor winding on the inner ring or the outer ring of the motor winding and driving the motor winding to rotate; the induction heating assembly comprises a first induction coil and a second induction coil; the first induction coil and the second induction coil can be matched with each other to form an induction coil pair capable of avoiding a clamping area of the second rotary clamping assembly on the motor winding to perform induction heating on the motor winding; wherein the induction coil pair comprises an inner side induction coil and an outer side induction coil; the inner side induction coil is used for conducting induction heating on the inner ring of the motor winding, and the outer side induction coil is used for conducting induction heating on the outer ring of the motor winding. According to the technical scheme, the heating efficiency of the motor winding can be improved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and more particularly to an induction heating device. Background Art

[0002] The purpose of impregnating the motor winding with paint is to remove the moisture contained in the winding and insulating materials, fill the air gap with insulating paint, bond the winding copper wire, slot insulation, slot wedge and fix it in the core slot, which can not only improve the insulation strength and moisture resistance of the winding, but also improve the heat resistance and heat dissipation of the winding, and also improve the mechanical properties and chemical stability of the winding insulation, while preventing the winding and insulating materials from moving in the slot. There are two main methods for impregnating the motor winding with paint: dipping and dripping. Compared with dipping, dripping can reduce the temperature rise of the motor, shorten the dipping cycle, and reduce the energy consumption and cost of insulation treatment. It is widely used in small motors.

[0003] After the paint drips on the motor winding, a fluid insulating paint will be formed to cover the motor winding. In order to prevent the insulating paint from dripping from the motor winding, the insulating paint needs to be gelled to convert the fluid insulating paint into a gel state. Usually, hot air heating is used, such as hot air oven heating, to heat the motor winding to achieve gelling of the insulating paint.

[0004] However, the hot air heating method has the problem of low heating efficiency. Therefore, how to improve the heating efficiency of the motor winding is a technical problem that those skilled in the art need to solve urgently. Utility Model Content

[0005] In view of this, in order to solve the above-mentioned technical problems, the present application provides an induction heating device, which is provided with an induction heating chamber, and the induction heating device includes an induction heating component and a second rotating clamping component; the second rotating clamping component is used to clamp the motor winding in the inner ring or outer ring of the motor winding and drive the motor winding to rotate.

[0006] The induction heating assembly includes a first induction coil and a second induction coil; the first induction coil and the second induction coil can cooperate with each other to form an induction coil pair that can avoid a preset clamping area to perform induction heating on the motor winding, and the preset clamping area is the clamping area of ​​the second rotating clamping assembly on the motor winding; wherein the induction coil pair includes an inner induction coil and an outer induction coil; the inner induction coil is used to perform induction heating on the inner ring of the motor winding, and the outer induction coil is used to perform induction heating on the outer ring of the motor winding.

[0007] Beneficial effect: Different from the prior art, during the rotation of the motor winding, the heating efficiency of the motor winding can be improved by inductively heating the inner and outer rings of the motor winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic structural diagram of an example of a gel system for a motor winding of the present application;

[0009] Figure 2 is a schematic structural diagram of an example of an induction heating device of a gel system of a motor winding of the present application;

[0010] Figure 3 is a schematic diagram of the relative position distribution of the induction coil pair, the clamp and the motor winding when the motor winding is inductively heated in an example of the gel system of the motor winding of the present application;

[0011] Figure 4 is a schematic structural diagram of an example of a hot air heating device for a gel system of a motor winding of the present application;

[0012] Figure 5 is a schematic structural diagram of another example of a gel system for a motor winding of the present application;

[0013] Figure 6 is a structural schematic diagram of another example of an induction heating device of a gel system of a motor winding of the present application;

[0014] Figure 7 is another example of the gel system for the motor winding of the present application, a schematic diagram of the relative position distribution of the induction coil pair, the clamp and the motor winding when the motor winding is inductively heated;

[0015] Figure 8 is a schematic structural diagram of another example of a hot air heating device for a gel system of a motor winding of the present application;

[0016] Fig. 9 It is a schematic flow chart of the gel method of the motor winding of the present application.

[0017] Description of reference numerals:

[0018] Gel system 10; induction heating device 100; induction heating chamber 101; second air inlet 102; second air outlet 103; hot air heating device 200; hot air heating chamber 201; first air inlet 202; first air outlet 203; winding shifting assembly 300; conveyor belt 310a; first mechanical arm 320a; second mechanical arm 310b; third mechanical arm 320b; first rotating clamping assembly 400; electric control switch door 500; motor winding 20;

[0019] Induction heating assembly 110; second rotating clamping assembly 120; clamp 121; first adapter 1211a; driven gear 1212a; first telescopic assembly 1213a; second adapter 1211b; second telescopic assembly 1212b; rotation drive mechanism 122; driving gear 1221a; first rotating motor 1222a; second rotating motor 1221b; second exhaust fan 130; first induction coil 111; second induction coil 112; first coil shifting assembly 113; first front-rear shifting module 1131 ; first left-right shift module 1132; second coil shift assembly 114; second front-back shift module 1141; second left-right shift module 1142; induction coil pair 30; inner induction coil 31; outer induction coil 32; first coil segment 32-1a; second coil segment 32-2a; third coil segment 31-1b; fourth coil segment 31-2b; hot air heating assembly 210; third rotating clamping assembly 220; heating wire 211; first fan assembly 212; first air intake fan 2121; first exhaust fan 2122. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described implementation methods are only part of the implementation methods of the present application, rather than all the implementation methods. Based on the implementation methods in the present application, all other implementation methods obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0021] First, the nouns appearing in the specific implementation manner of this application are explained.

[0022] Filling rate: Each motor winding is cut vertically at a certain axial position, and the ratio of the actual filling area of ​​the insulating paint on each section to the theoretical full filling area is measured and calculated, which is the filling rate of the section. The lowest filling rate of each section is taken as the filling rate of the motor winding. In this application, the filling rate is the average value of the filling materials of multiple motor windings.

[0023] Fluctuation: For multiple motor windings, measure the filling rate of each motor winding, then fluctuation = (maximum filling rate - minimum filling rate) / minimum filling rate.

[0024] Motor winding: The motor winding includes an iron core and a coil. For example, the iron core may be made of silicon steel sheets. The motor winding may be a motor stator or a motor rotor.

[0025] See also Figure 1-Figure 4As shown, the gel system 10 for the motor winding 20 includes an induction heating device 100, a hot air heating device 200, a winding displacement assembly 300 and a first rotating clamping assembly 400 which are arranged in sequence.

[0026] The first rotating clamping assembly 400 is disposed on the winding displacement assembly 300, and the first rotating clamping assembly 400 is used to drive the motor winding 20 to rotate. The induction heating device 100 is provided with an induction heating chamber 101. The hot air heating device 200 is provided with a hot air heating chamber 201. The winding displacement assembly 300 is used to move the first rotating clamping assembly 400 to sequentially shift the motor winding 20 to the induction heating chamber 101 and the hot air heating chamber 201.

[0027] The induction heating device 100 includes an induction heating component 110 and a second rotating clamping component 120, wherein the second rotating clamping component 120 is used to drive the motor winding 20 in the induction heating chamber 101 to rotate, and the induction heating component 110 is used to alternately perform induction heating on the inner ring and the outer ring of the motor winding 20 in the induction heating chamber 101. The hot air heating device 200 includes a hot air heating component 210 and a third rotating clamping component 220, wherein the third rotating clamping component 220 is used to drive the motor winding 20 in the hot air heating chamber 201 to rotate, and the hot air heating component 210 is used to introduce hot air into the hot air heating chamber 201 to perform hot air heating on the motor winding 20. Among them, the induction heating chamber 101 and the hot air heating chamber 201 are independent of each other.

[0028] Through the above method, at least the following beneficial effects are achieved. First, the rotation of the motor winding 20 is maintained during the displacement process, so that the insulating paint in a fluid state on the motor winding 20 is not easy to drip during the displacement, which can reduce the amount of paint overflow. Second, by alternately induction heating the inner ring and the outer ring of the motor winding 20 in the first heating, and hot air heating of the motor winding 20 in the second heating, in addition to further reducing the amount of paint overflow, the filling rate can also be increased and the volatility of the filling rate can be reduced.

[0029] Alternatively, if Figure 1 As shown, in one example, the winding displacement assembly 300 may include a conveyor belt 310a and a first mechanical arm 320a disposed on the conveyor belt 310a. The first rotating clamping assembly 400 is disposed on the first mechanical arm 320a, and the conveyor belt 310a is used to drive the first mechanical arm 320a to move so that the first mechanical arm 320a moves to a position corresponding to the induction heating device 100 or the hot air heating device 200. The first mechanical arm 320a is used to drive the first rotating clamping assembly 400 to move so that the first rotating clamping assembly 400 enters or exits the corresponding heating chamber.

[0030] It should be understood that, in conjunction with Figure 1 See also Figure 2 and Figure 4 The cavity wall of the induction heating cavity 101 or the cavity wall of the hot air heating cavity 201 is provided with an electric control switch door 500 for the first rotating clamping assembly 400 to enter and exit. In this way, when the first rotating clamping assembly 400 needs to enter and exit the induction heating cavity 101 or the hot air heating cavity 201, the corresponding electric control switch door 500 can be controlled to open. After the first rotating clamping assembly 400 exits the induction heating cavity 101 or the hot air heating cavity 201, the corresponding electric control switch door 500 can be controlled to close again.

[0031] Optionally, compare Figure 1 See also Figure 5 In another example, the winding displacement assembly 300 may include a second mechanical arm 310b and a third mechanical arm 320b. The second mechanical arm 310b and the third mechanical arm 320b are each provided with a first rotating clamping assembly 400. The second mechanical arm 310b, the induction heating device 100, the third mechanical arm 320b and the hot air heating device 200 are arranged in sequence. Among them, the second mechanical arm 310b is used to drive the corresponding first rotating clamping assembly 400 to move so that the corresponding first rotating clamping assembly 400 enters or exits the induction heating chamber 101. The second mechanical arm 310b is used to drive the corresponding first rotating clamping assembly 400 to move so that the corresponding first rotating clamping assembly 400 switches between the induction heating chamber 101 and the hot air heating chamber 201.

[0032] Optionally, see Figure 4 The hot air heating assembly 210 includes a heating wire 211 and a first fan assembly 212. The heating wire 211 is used to heat the gas. The first fan assembly 212 is used to drive the gas heated by the heating wire 211 to flow to form hot air entering the hot air heating chamber 201.

[0033] Further, see Figure 4 The hot air heating chamber 201 is provided with a first air inlet 202 and a first air outlet 203. The heating wire 211 is provided in the hot air heating chamber 201 and is located at the side where the first air inlet 202 is located. The first fan assembly 212 includes a first air inlet fan 2121 and a first air outlet fan 2122.

[0034] The first air inlet fan 2121 is provided corresponding to the first air inlet 202, and is used to drive the gas so that the gas passes into the hot air heating chamber 201 through the first air inlet 202. The first exhaust fan 2122 is provided corresponding to the first air outlet 203, and is used to drive the gas heated by the heating wire 211 to flow so as to form hot air that flows through the hot air heating chamber 201 and flows out from the first air outlet 203.

[0035] Through the above-mentioned method, by utilizing the mutual cooperation of the first air inlet 202, the first air outlet 203, the first air inlet fan 2121, the first exhaust fan 2122 and the heating wire 211, the gas in the hot air heating chamber 201 is continuously renewed and heated, and the gas containing volatile substances of the insulating paint is discharged through the first air outlet 203, so as to avoid or reduce the influence of the volatile substances of the insulating paint on the structure of the motor winding 20.

[0036] Furthermore, if Figure 2 and Figure 3 As shown, the induction heating chamber 101 is provided with a second air inlet 102 and a second air outlet 103, and the induction heating device 100 includes a second exhaust fan 130, which is arranged corresponding to the second air outlet 103 and is used to drive the gas to form an airflow that flows through the second air inlet 102 and the induction heating chamber 101 in sequence and flows out from the second air outlet 103.

[0037] Through the above-mentioned method, the gas in the induction heating chamber 101 is continuously updated by utilizing the mutual cooperation of the second exhaust fan 130, the second air inlet 102 and the second air outlet 103, wherein the gas containing volatile substances of the insulating paint in the induction heating chamber 101 is continuously discharged through the second air outlet 103, so as to avoid or reduce the influence of the volatile substances of the insulating paint on the structure of the motor winding 20.

[0038] Furthermore, if Figure 2 and Figure 3 As shown, the induction heating assembly 110 includes a first induction coil 111 and a second induction coil 112. The first induction coil 111 and the second induction coil 112 can cooperate with each other to form an induction coil pair 30 that can avoid a preset clamping area to perform induction heating on the motor winding 20. The preset clamping area is the clamping area of ​​the second rotating clamping assembly 120 on the motor winding 20. The induction coil pair 30 includes an inner induction coil 31 and an outer induction coil 32. The inner induction coil 31 is used to perform induction heating on the inner ring of the motor winding 20, and the outer induction coil 32 is used to perform induction heating on the outer ring of the motor winding 20.

[0039] In the above manner, the first induction coil 111 and the second induction coil 112 are used to form an induction coil pair 30, and the inner ring and the outer ring of the motor winding 20 are inductively heated. A space can be reserved between the first induction coil 111 and the second induction coil 112 for the second rotating clamping assembly 120 to clamp the motor winding 20 at the inner ring or the outer ring of the motor winding 20, so that the second rotating clamping assembly 120 can clamp the motor winding 20 during the induction heating process. In addition, during the rotation of the motor winding 20, the heating efficiency of the motor winding 20 can be improved by inductively heating the inner ring and the outer ring of the motor winding 20.

[0040] Furthermore, if Figure 2 and Figure 3 As shown, the induction heating device 100 includes a first coil displacement component 113 and a second coil displacement component 114 .

[0041] The first coil displacement assembly 113 is connected to the first induction coil 111 and is used to drive the first induction coil 111 closer to or away from the motor winding 20. The second coil displacement assembly 114 is connected to the second induction coil 112 and is used to drive the second induction coil 112 closer to or away from the motor winding 20.

[0042] When the first induction coil 111 and the second induction coil 112 are both close to the motor winding 20 , the first induction coil 111 and the second induction coil 112 cooperate with each other to form an induction coil pair 30 .

[0043] By combining the above methods Figure 1 See also Figure 2-Figure 4 When the motor winding 20 is shifted from the induction heating chamber 101 to the hot air heating chamber 201 , steps S11 to S16 may be performed in sequence.

[0044] Step S11: Control the first coil shifting assembly 113 and the second coil shifting assembly 114 to respectively drive the first induction coil 111 and the second induction coil 112 away from the motor winding 20, and control the output end of the second rotating clamping assembly 120 to keep clamping the motor winding 20 and keep driving the motor winding 20 to rotate.

[0045] Step S12 : controlling the winding shifting assembly 300 to move the first rotating clamping assembly 400 , so that the first rotating clamping assembly 400 enters the induction heating chamber 101 .

[0046] Step S13 : controlling the output end of the first rotating clamping assembly 400 to rotate synchronously with the motor winding 20 and clamp the motor winding 20 .

[0047] Step S14 : controlling the output end of the first rotating clamping assembly 400 to loosen the motor winding 20 , and controlling the winding shifting assembly 300 to move the first rotating clamping assembly 400 , so that the first rotating clamping assembly 400 enters the hot air heating chamber 201 .

[0048] Step S15 : controlling the output end of the third rotating clamping assembly 220 to rotate synchronously with the motor winding 20 and clamp the motor winding 20 .

[0049] Step S16: controlling the first rotating clamping assembly 400 to loosen the motor winding 20 , and controlling the winding shifting assembly 300 to move the first rotating clamping assembly 400 , so that the first rotating clamping assembly 400 withdraws from the hot air heating chamber 201 .

[0050] Based on steps S11 to S16, the motor winding 20 can be kept rotating continuously during the entire process of shifting the motor winding 20 from the induction heating chamber 101 to the hot air heating chamber 201, so that the insulating paint still in a fluid state on the motor winding 20 is not easy to overflow and drip from the motor winding 20.

[0051] Furthermore, if Figure 2 and Figure 3 As shown, the second rotating clamping assembly 120 includes a clamper 121 and a rotating driving mechanism 122 .

[0052] The clamp 121 is the output end of the second rotating clamp assembly 120, and is used to clamp the motor winding 20 at the inner or outer ring of the motor winding 20. The rotating drive mechanism 122 is connected to the clamp 121, and is used to drive the clamp 121 to rotate, so that the motor winding 20 rotates.

[0053] Through the above-mentioned manner, the clamping of the motor winding 20 by the clamper 121 and the rotation of the clamper 121 driven by the rotary drive mechanism 122 can be controlled independently without affecting each other, so as to facilitate control.

[0054] In particular, before the second rotating clamping assembly 120 releases the motor winding 20, the second rotating clamping assembly 120 is used to drive the motor winding 20 to rotate, and the output end of the first rotating clamping assembly 400 rotates synchronously with the motor winding 20 and clamps the motor winding 20, so that after the second rotating clamping assembly 120 releases the motor winding 20, the first rotating clamping assembly 400 can be used to maintain the rotation of the motor winding 20.

[0055] Alternatively, if Figure 2 and Figure 3 As shown, in one example, the clamp 121 can clamp the motor winding 20 at the outer ring of the motor winding 20. Specifically, the clamp 121 includes a first adapter 1211a, an annular driven gear 1212a, and a plurality of first telescopic components 1213a.

[0056] The first adapter 1211a is annular and rotatably arranged in the induction heating chamber 101. The annular driven gear 1212a is fixedly arranged on the first adapter 1211a and is arranged concentrically with the first adapter 1211a. The rotary drive mechanism 122 is meshed with the annular driven gear 1212a to drive the annular driven gear 1212a to drive the first adapter 1211a to rotate. A plurality of first telescopic components 1213a are arranged on the first adapter 1211a and are distributed along the annular direction of the first adapter 1211a. Among them, the plurality of first telescopic components 1213a can be extended or retracted, and the plurality of first telescopic components 1213a can clamp the outer ring of the motor winding 20 when extended, and the plurality of first telescopic components 1213a can loosen the motor winding 20 when retracted. In this way, the motor winding 20 can be clamped more stably by using the plurality of first telescopic components 1213a.

[0057] By way of example and not limitation, the telescopic assembly may be an electric cylinder assembly or a pneumatic cylinder assembly, but is not limited thereto.

[0058] Furthermore, if Figure 2 and Figure 3 As shown, the rotary drive mechanism 122 includes a driving gear 1221a and a first rotary motor 1222a. The driving gear 1221a meshes with the annular driven gear 1212a. The driving gear 1221a is disposed on the output shaft of the first rotary motor 1222a.

[0059] Alternatively, if Figure 2 As shown, the first coil shifting assembly 113 includes a first front-to-back shifting module 1131 and a first left-to-right shifting module 1132 .

[0060] The first front-to-back displacement module 1131 is disposed in the induction heating chamber 101, and is used to drive the first induction coil 111 to move in the front-to-back direction to align the motor winding 20 on the left side of the motor winding 20. The first left-to-right displacement module 1132 is disposed in the induction heating chamber 101, and is used to drive the first induction coil 111 to move in the left-to-right direction to approach or move away from the aligned motor winding 20.

[0061] Alternatively, if Figure 2 As shown, the second coil shifting assembly 114 includes a second front-to-back shifting module 1141 disposed in the induction heating chamber 101, for driving the second induction coil 112 to move along the front-to-back direction to align with the motor winding 20 on the right side of the motor winding 20; a second left-right shifting module 1142 is disposed in the induction heating chamber 101, for driving the second induction coil 112 to move along the left-right direction to approach or move away from the aligned motor winding 20.

[0062] Optionally, combined Figure 2 See also Figure 3As shown, the outer induction coil 32 includes a first coil segment 32-1a ( Figure 3 The coil segment in the dotted line area) and the second coil segment 32-2a ( Figure 3 The first coil segment 32-1a is formed by the first induction coil 111, the second coil segment 32-2a is formed by a part of the second induction coil 112; and the inner induction coil 31 is formed by another part of the second induction coil 112. In this way, a space can be reserved between the first coil segment 32-1a and the second coil segment 32-2a for the second rotating clamping assembly 120 to clamp the motor winding 20 at the outer ring of the motor winding 20.

[0063] By way of example and not limitation, Figure 2 See also Figure 3 As shown, the first coil segment 32-1a and the second coil segment 32-2a can cover part of the outer circle of the motor winding 20, and the length of the first coil segment 32-1a and the second coil segment 32-2a along the axial direction of the motor winding 20 corresponding to the part of the outer circle of the motor winding 20 covered by the first coil segment 32-1a and the second coil segment 32-2a is at least 10 mm.

[0064] Optionally, compare Figure 2 and Figure 3 See also Figure 6 and Figure 7 As shown, in another example, the clamp 121 can clamp the motor winding 20 at the inner ring of the motor winding 20. Figure 6 and 7 The structure of another example of the induction heating assembly 100 is similar to the above Figure 2 and Figure 3 The same parts of the structure of the induction heating assembly 100 in the illustrated example will not be described in detail, and only the differences will be described.

[0065] Specifically, see Figure 6 and Figure 7 As shown, in this other example, the clamp 121 includes a second adapter 1211b and a plurality of second telescopic components 1212b.

[0066] The second adapter 1211b is connected to the rotation drive mechanism 122, and the rotation drive mechanism 122 is used to drive the second adapter 1211b to rotate. A plurality of second telescopic components 1212b are arranged on the second adapter 1211b and are distributed along the circumferential direction of the second adapter 1211b. Among them, the plurality of second telescopic components 1212b can be extended or retracted. When the plurality of second telescopic components 1212b are extended, the motor winding 20 can be clamped, and when the plurality of second telescopic components 1212b are retracted, the motor winding 20 can be loosened. In this way, the motor winding 20 can be clamped more stably by using the plurality of second telescopic components 1212b.

[0067] By way of example and not limitation, Figure 6 and Figure 7 As shown, the rotary drive mechanism 122 includes a second rotary motor 1221b, and the second adapter 1211b is disposed on the output shaft of the second rotary motor 1221b.

[0068] Alternatively, if Figure 6 and Figure 7 As shown, the inner induction coil 31 includes a third coil segment 31-1b ( Figure 7 The coil segment in the middle dotted line area) and the fourth coil segment 31-2b ( Figure 7 The third coil segment 31-1b is formed by a portion of the first induction coil 111, the fourth coil segment 31-2b is formed by the second induction coil 112; and the outer induction coil 32 is formed by another portion of the first induction coil 111. In this way, a space can be reserved between the third coil segment 31-1b and the fourth coil segment 31-2b for the second rotating clamping assembly 120 to clamp the motor winding 20 at the inner circle of the motor winding 20.

[0069] By way of example and not limitation, Figure 6 and Figure 7 As shown, the third coil segment 31-1b and the fourth coil segment 31-2b can cover part of the inner circle of the motor winding 20, and the length of the corresponding part covered by the third coil segment 31-1b and the fourth coil segment 31-2b in the inner circle of the motor winding 20 along the axial direction of the motor winding 20 is at least 10 mm.

[0070] The present application also provides a gel method for a motor winding 20, which can be used in the gel system 10 for the motor winding 20. The gel method for the motor winding 20 includes steps S110 to S140.

[0071] Step S110: Control the motor winding covered with the insulating varnish in a fluid state to be shifted to the induction heating chamber, and control the motor winding to rotate during the shifting process.

[0072] Generally, there is a paint dripping step before the gelling process, after which the motor windings are covered with insulating paint. After the paint dripping step, the motor windings covered with insulating paint in a fluid state can be controlled to be shifted to the induction heating chamber. During the shifting process, the rotation of the motor windings can be controlled to reduce the amount of paint spillage.

[0073] Step S120: controlling the rotation of the motor winding to be maintained in the induction heating chamber, and controlling the first heating of the motor winding; the first heating includes alternately induction heating the inner ring and the outer ring of the motor winding.

[0074] In step S120, the temperature of the motor winding can be increased more quickly by induction heating, so that the insulating paint in a fluid state can be transformed into a gel state as soon as possible after the temperature is increased, thereby reducing the amount of paint overflow.

[0075] Step S130: Control the motor winding after the first heating to shift from the induction heating chamber to the hot air heating chamber, and control the motor winding to rotate during the shifting process.

[0076] In step S130, keeping the motor winding rotating during the shifting process can reduce the amount of paint overflow from the motor winding.

[0077] Step S140: Control to maintain the rotation of the motor winding in the hot air heating chamber, and control to perform a second heating on the motor winding, the second heating includes performing hot air heating on the motor winding to convert the insulating varnish covering the motor winding into a gel state.

[0078] Optionally, the step of alternately performing induction heating on the inner ring and the outer ring of the motor winding in the first heating comprises steps S121 to S122 performed in sequence.

[0079] Step S121: alternately induction heating the inner and outer rings of the motor windings to heat the motor windings to a first temperature; wherein the first temperature is 130°C to 190°C (eg, 130°C, 150°C, 170°C, 190°C).

[0080] The temperature of the motor winding can be sensed by an infrared sensor disposed in the induction heating chamber to determine whether the motor winding is heated to the first temperature.

[0081] Step S122: alternately induction heating the inner ring and the outer ring of the motor winding to keep the motor winding at a first temperature, wherein the insulation time of the first temperature is 3.5 min to 11 min (for example, 3.5 min, 5 min, 8 min, 11 min).

[0082] Among them, the step of shifting the motor winding after the first heating from the induction heating chamber to the hot air heating chamber includes: in response to the first temperature insulation time being reached, shifting the motor winding from the induction heating chamber to the hot air heating chamber.

[0083] Optionally, the time for heating the motor winding to the first temperature is a first heating time, and the first heating time is 0.5 min to 2 min (for example, 0.5 min, 1 min, 2 min).

[0084] Optionally, the hot air heating in the second heating includes: hot air heating the motor winding with hot air at a second temperature. The second temperature is 140°C to 200°C (for example, 140°C, 180°C, 200°C). The hot air heating time is 6 minutes to 14 minutes (for example, 6 minutes, 9 minutes, 14 minutes).

[0085] The temperature of the hot air can be sensed by a temperature sensor disposed in the hot air heating chamber to determine whether the hot air reaches the second temperature.

[0086] Optionally, the rotation speed of the motor winding in the induction heating chamber, the hot air heating chamber and the displacement process is 5rpm to 40rpm, for example, 5rpm, 10rpm, 30rpm, 40rpm.

[0087] Optionally, the temperature is controlled with an accuracy of ±5°C throughout the gelation process.

[0088] The following control experiment is designed in combination with the embodiments and comparative examples to illustrate the beneficial effects of the gel method for the motor winding of the present application, wherein the embodiment adopts the gel method for the motor winding of the present application, and the comparative example adopts the gel method for the motor winding in contrast to the embodiment.

[0089] Example 1

[0090] Step S101a: heating the motor winding to a preheating temperature and preheating the motor winding.

[0091] Among them, the preheating temperature is 110°C and the preheating time is 60 minutes.

[0092] Since the preheating process of the motor winding is not the key point in this application, in addition to using the above preheating thermometer preheating time, you can also refer to the relevant records in the prior art and use other preheating temperatures and preheating times, which will not be repeated here.

[0093] Step S102a: dripping paint on the preheated motor windings so that the motor windings are covered with insulating paint in a fluid state.

[0094] Among them, since the motor winding has been heated to degrees Celsius before, during the paint dripping process, the insulating paint in a fluid state can spread on the motor winding, making the insulating paint more evenly distributed on the motor winding.

[0095] Since the paint dripping process on the motor winding is not the key point in this application, the detailed paint dripping process can be referred to the relevant records in the prior art and will not be repeated here.

[0096] Step S110a: Control the motor winding covered with the insulating varnish in a fluid state to be shifted to the induction heating chamber, and control the motor winding to rotate during the shifting process.

[0097] Among them, the rotation speed of the motor winding is 20rpm.

[0098] Step S120a: controlling the rotation of the motor winding to be maintained in the induction heating chamber, and controlling the first heating of the motor winding; the first heating includes alternately induction heating the inner ring and the outer ring of the motor winding.

[0099] The rotation speed of the motor winding is 20 rpm, and the step of alternately performing induction heating on the inner ring and the outer ring of the motor winding in the first heating includes steps S121a to S122a performed in sequence.

[0100] Step S121a: alternately induction heating the inner ring and the outer ring of the motor winding to heat the motor winding to a first temperature; wherein the first temperature is b1°C.

[0101] Step S122a: alternately induction heating the inner ring and the outer ring of the motor winding to keep the motor winding at a first temperature, and the insulation time of the first temperature is c1min.

[0102] Step S130a: Control the motor winding after the first heating to shift from the induction heating chamber to the hot air heating chamber, and control the motor winding to rotate during the shifting process;

[0103] Among them, the rotation speed of the motor winding is 20rpm.

[0104] Step S140a: Control the rotation of the motor winding in the hot air heating chamber and control the second heating of the motor winding, the second heating includes hot air heating the motor winding to convert the insulating paint covering the motor winding into a gel state, wherein the induction heating chamber and the hot air heating chamber are independent of each other.

[0105] Among them, the rotation speed of the motor winding is 20rpm, and the hot air heating in the second heating includes: hot air heating the motor winding with hot air at a second temperature; wherein the second temperature is b2°C; and the hot air heating time is c2min.

[0106] Step S150a: Control the motor winding after the second heating to be shifted from the hot air heating chamber to the curing heating chamber, and control the curing of the insulating paint in a gel state on the motor winding.

[0107] Curing involves heating the motor windings to 160°C and holding for 60 minutes.

[0108] Since the curing process is not the key point in this application, in addition to using the above temperature and insulation time, you can also refer to the relevant records in the prior art and use other temperatures and insulation times, which will not be repeated here.

[0109] Comparative Example 1

[0110] The parts of Comparative Example 1 that are the same as those in Example 1 will not be repeated here. The difference lies in that the alternating induction heating of the inner and outer rings of the motor winding in Example 1 is replaced by the simultaneous induction heating of the inner and outer rings of the motor winding, and the rest remains unchanged.

[0111] Comparative Example 2

[0112] The same parts in Comparative Example 2 as those in Example 1 are not described in detail. The difference is that the induction heating chamber and the hot air heating chamber are the same heating chamber, that is, the induction heating and the hot air heating use the same space for heating. Therefore, step S130a in Example 1 is not required in Comparative Example 2, and the rest remains unchanged.

[0113] Each group of control experiments includes Example 1, Comparative Example 1 and Comparative Example 2. Multiple groups of control experiments are carried out to test the motor windings after curing the insulating paint, and the paint overflow amount, filling rate and the volatility of the filling rate are statistically obtained as shown in Table 1 below.

[0114] Table 1: Control experiment table.

[0115]

[0116] As shown in Table 1 above, the representation of each parameter is as follows:

[0117] A1+B1 means: induction heating and hot air heating are heated in independent spaces, and induction heating heats the inner and outer rings of the motor winding alternately.

[0118] A1+B2 means: induction heating and hot air heating use independent space heating, and induction heating heats the inner and outer rings of the motor winding at the same time.

[0119] A2+B1 means: induction heating and hot air heating are heated in the same space, and induction heating heats the inner and outer rings of the motor winding alternately.

[0120] In order to facilitate the understanding of the data in Table 1, the two columns of data where b1*c1 and b2*c2 are located are explained by taking Example 1 of Control Experiment 1 as an example. Among them, 130*11 means b1 is 130 and c1 is 11. 140*14 means b2 is 140 and c2 is 14.

[0121] Based on the data in Table 1, the following comparison is made:

[0122] Comparison 1: It can be seen from the control experiments in Table 1 that the amount of paint overflow, filling rate and the volatility of the filling rate in Example 1 of each group of control experiments are better than those in Comparative Example 1 of the same group of control experiments. It can be concluded that the heating method A1+B1 is better than the heating method A1+B2.

[0123] Comparison 2: It can be seen from the control experiments in Table 1 that the amount of paint overflow, filling rate and the volatility of the filling rate in Example 1 of each group of control experiments are better than those in Comparative Example 2 of the same group of control experiments. It can be concluded that the heating method A1+B1 is better than the heating method A2+B1.

[0124] Based on the above comparison, it can be seen that the gel method of the motor winding of the present application can increase the amount of paint overflow, increase the filling rate and reduce the volatility of the filling rate.

[0125] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An induction heating device, characterized in that: The induction heating device is provided with an induction heating chamber, and the induction heating device comprises an induction heating component and a second rotating clamping component; the second rotating clamping component is used to clamp the motor winding at the inner ring or the outer ring of the motor winding and drive the motor winding to rotate; The induction heating assembly includes a first induction coil and a second induction coil; the first induction coil and the second induction coil can cooperate with each other to form an induction coil pair that can avoid a preset clamping area and perform induction heating on the motor winding, and the preset clamping area is a clamping area of ​​the second rotating clamping assembly on the motor winding; Wherein, the induction coil pair includes an inner induction coil and an outer induction coil; the inner induction coil is used for induction heating the inner circle of the motor winding, and the outer induction coil is used for induction heating the outer circle of the motor winding.

2. The induction heating device according to claim 1, characterized in that: The induction heating device comprises: A first coil displacement component, connected to the first induction coil, and used to drive the first induction coil to move closer to or away from the motor winding; and a second coil displacement assembly connected to the second induction coil and used for driving the second induction coil to approach or move away from the motor winding; Wherein, when the first induction coil and the second induction coil are both close to the motor winding, the first induction coil and the second induction coil cooperate with each other to form the induction coil pair.

3. The induction heating device according to claim 1, characterized in that: The second rotating clamping assembly comprises: A clamper, used for clamping the motor winding at the inner ring or outer ring of the motor winding; And a rotation driving mechanism is connected with the clamp and is used to drive the clamp to rotate so as to rotate the motor winding.

4. The induction heating device according to claim 3, characterized in that: The holder comprises: A first adapter, which is annular and rotatably disposed in the induction heating chamber; an annular driven gear, fixedly disposed on the first adapter and arranged concentrically with the first adapter; the rotary drive mechanism is engaged with the annular driven gear to drive the annular driven gear to rotate; and a plurality of first telescopic components, which are arranged on the first adapter and distributed along the circumferential direction of the first adapter; Among them, multiple first telescopic components can be extended or retracted, and multiple first telescopic components can clamp the outer ring of the motor winding when extended, and multiple first telescopic components can loosen the outer ring of the motor winding when retracted.

5. The induction heating device according to claim 4, characterized in that: The rotary drive mechanism comprises: A driving gear meshing with the driven gear; and a first rotating motor, wherein the driving gear is arranged on an output shaft of the first rotating motor.

6. The induction heating device according to claim 3, characterized in that: The holder comprises: A second adapter, connected to the rotation drive mechanism, and the rotation drive mechanism is used to drive the second adapter to rotate; A plurality of second telescopic components, disposed on the second adapter and distributed along the circumferential direction of the second adapter; Among them, multiple second telescopic components can be extended or retracted, and multiple second telescopic components can clamp the inner circle of the motor winding when extended, and can loosen the inner circle of the motor winding when retracted.

7. The induction heating device according to claim 2, characterized in that: The first coil shifting assembly comprises: A first front-to-back displacement module is disposed in the induction heating chamber and is used to drive the first induction coil to move in a front-to-back direction so as to align the motor winding on the left side of the motor winding; And a first left-right shifting module is arranged in the induction heating chamber and is used to drive the first induction coil to move along the left-right direction so as to approach or move away from the aligned motor winding.

8. The induction heating device according to claim 2, characterized in that: The second coil shifting assembly comprises: A second front-to-back displacement module is disposed in the induction heating chamber and is used to drive the second induction coil to move in the front-to-back direction so as to align with the motor winding on the right side of the motor winding; And a second left-right shifting module is arranged in the induction heating chamber and is used to drive the second induction coil to move along the left-right direction so as to approach or move away from the aligned motor winding.

9. The induction heating device according to claim 1, characterized in that: The outer induction coil includes a first coil segment and a second coil segment which are arranged in segments, the first coil segment is formed by the first induction coil, the second coil segment is formed by a portion of the second induction coil; and the inner induction coil is formed by another portion of the second induction coil; Alternatively, the inner induction coil includes a third coil segment and a fourth coil segment that are arranged in segments, the third coil segment is formed by a portion of the first induction coil, and the fourth coil segment is formed by the second induction coil; and the outer induction coil is formed by another portion of the first induction coil.

10. The induction heating device according to claim 9, characterized in that: The first coil segment and the second coil segment can cover a portion of the outer circle of the motor winding, and the length of the portion of the outer circle of the motor winding correspondingly covered by the first coil segment and the second coil segment is at least 10 mm along the axial direction of the motor winding; Alternatively, the third coil segment and the fourth coil segment can cover a portion of the inner circle of the motor winding, and the length of the portion of the inner circle of the motor winding correspondingly covered by the third coil segment and the fourth coil segment is at least 10 mm along the axial direction of the motor winding.

Images