Motor turn-to-turn short circuit test equipment
By designing adjustable fixed rods and drive parts combined with multi-directional adjustment of oscilloscope probes, the problems of poor versatility and low accuracy of existing motor interturn short-circuit testing equipment are solved, and accurate interturn short-circuit detection of motor rotors of different specifications is achieved, reducing costs.
Patent Information
- Application Number
- CN202510709299.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-29
- Publication Date
- 2025-07-04
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing motor interturn short circuit testing equipment can only meet rotor testing of one size specification, which is costly and has poor test accuracy, so it is impossible to accurately measure the short circuit between each turn.
A motor turn short circuit test device including a test platform, winding fixing assembly and a dual-wire oscilloscope is designed. The fixed and rotation of motor rotors of different lengths and diameter sizes is achieved through adjustable fixing rods and drive members. Combined with the multi-directional adjustment of the oscilloscope probe, accurate tests between different coil turns are achieved.
It improves the versatility of the equipment, reduces costs, and through multi-directional adjustment and precise testing, it realizes accurate detection of the inter-turn short circuit situation of motor rotors of different specifications.
Smart Images
Figure CN120254698A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of motor turn - to - turn short - circuit testing, and particularly relates to a motor turn - to - turn short - circuit testing device. Background Art
[0002] During the production process of a motor rotor, due to installation and manufacturing process problems, a part of metal iron filings will adhere to the inter - winding layer, damaging the inter - layer insulation and causing turn - to - turn short - circuit. Turn - to - turn short - circuit easily leads to insulation accidents during the operation of the motor rotor, such as overheating, deformation or melting of the wire, and seriously causes the rotor to burn out. Secondly, turn - to - turn short - circuit forms an asymmetric magnetic field component in the air - gap magnetic flux, which will cause a series of shafting vibration problems. Therefore, before leaving the factory, it is necessary to conduct turn - to - turn short - circuit testing on the produced motor rotors. Currently, a turn - to - turn short - circuit testing device is generally used to test whether there is a turn - to - turn short - circuit in the motor rotor.
[0003] In the actual use process, the testing equipment for motor turn - to - turn can only meet the testing of rotors with one size specification. Different size specifications of rotors require different testing equipment, which increases the cost of rotor turn - to - turn short - circuit testing, has poor universality in use, and is not convenient for measuring the short - circuit situation between each turn. It can only conduct turn - to - turn short - circuit testing on the entire winding of the rotor, and the testing accuracy needs to be improved. Summary of the Invention
[0004] The purpose of the present invention is to provide a motor turn - to - turn short - circuit testing device. This turn - to - turn testing device can meet the turn - to - turn short - circuit testing of motor rotors with different lengths and different diameter size specifications, and can realize the testing of the short - circuit situation between different coil turns. Compared with the testing of the whole winding, the testing is accurate.
[0005] To achieve the above purpose, the present invention provides the following technical solutions: A motor turn - to - turn short - circuit testing device includes a testing platform, a winding fixing component, and a dual - trace oscilloscope. The winding fixing component includes a bracket fixed on the testing platform. A cross - bar is rotatably connected inside the bracket. Fixing frames are fixed at both ends of the cross - bar. A fixing rod is slidably connected to the end of the fixing frame away from the cross - bar. There are four fixing rods. A driving member is also connected to the middle position of the cross - bar for driving the cross - bar to rotate. The dual - trace oscilloscope is placed on the testing platform. The dual - trace oscilloscope is connected with oscilloscope probes, and two oscilloscope probes are placed under each fixing frame.
[0006] Further, a sliding groove for the fixing rod to slide is opened on the fixing frame. A first spring is fixed on one side of each fixing rod, and the other end of the first spring is fixed at the bottom of the sliding groove.
[0007] Adopting the above scheme can meet the turn - to - turn short - circuit testing of motor rotors with different diameter size specifications, improve the universality in use, and reduce the equipment cost of testing.
[0008] Furthermore, a fixing plate is fixed on the fixing rod, a sliding plate is arranged opposite to the fixing plate, the sliding plate slides along the length direction of the fixing rod, a second spring is fixed at the end of the sliding plate facing the fixing plate, a groove is formed at the end of the fixing rod away from the sliding plate, a movable plate is rotatably connected inside the groove, a third spring is fixed at the end of the movable plate facing the groove, and the third spring...
[0009] Adopting the above solution can meet the inter-turn short circuit tests of motor rotors with different lengths, further improve the universality of use, and reduce the equipment cost of testing.
[0010] Furthermore, the driving member includes a first transmission wheel fixed outside the cross bar, and also includes a motor fixed on the test platform. The output end of the motor is connected with a second transmission wheel, and a transmission track is connected between the first transmission wheel and the second transmission wheel.
[0011] Adopting the above solution, the structure is simple, and it is convenient to operate to drive the two fixing frames to rotate, thereby facilitating the control of the winding rotation and realizing the short circuit situation test between different coil turns. Compared with the test between the overall windings, the test is accurate.
[0012] Furthermore, a sleeve rod is sleeved outside the oscilloscope probe, a spherical connecting block is fixed at the bottom of the sleeve rod, a supporting block is arranged outside the corresponding spherical connecting block, a spherical card slot is formed inside the supporting block, and a supporting rod is fixed at the bottom of the supporting block, and the supporting rod is fixed on the test platform.
[0013] Adopting the above solution, the oscilloscope probe can rotate in the 360° direction, can be adjusted in multiple directions, and is convenient to be adjusted to both sides of motor windings with different specifications for testing.
[0014] The beneficial effects of the present invention are as follows: 1. For this inter-turn test device of the motor, four fixing rods with adjustable spacing are arranged on the fixing frame to place and fix the motor winding. At the same time, a sliding plate and a fixing plate are arranged on the fixing rod, which can meet the inter-turn short circuit tests of motor rotors with different lengths and different diameter sizes, improve the universality of use, and reduce the equipment cost of testing.
[0015] 2. For this inter-turn test device of the motor, on the basis of meeting the clamping requirements of the inter-turn short circuit tests of motor rotors with different lengths and different diameter sizes, the movable plate arranged can automatically pop out to fix the winding after the winding is fixed. At the same time, when taking out the winding, the movable plate can be pressed to rotate into the groove, which is convenient for taking out the winding and improves the test efficiency.
[0016] 3. The motor turn-to-turn test device is provided with a driving member. During the winding test, the driving member can rotate to drive the winding to rotate, and at the same time, the oscilloscope probe can be adjusted. The combination of the two can realize the test of the short-circuit situation between different coil turns. Compared with the test of the overall winding, the test is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification, but do not constitute a limitation to the present invention. In the drawings: Figure 1 is a schematic diagram of the overall structure of a motor turn-to-turn short-circuit test device according to this embodiment; Figure 2 is a schematic diagram of the structure of the winding fixing assembly of a motor turn-to-turn short-circuit test device according to this embodiment; Figure 3 is a motor turn-to-turn short-circuit test device according to this embodiment Figure 2 The enlarged schematic diagram at I in; Figure 4 is a motor turn-to-turn short-circuit test device provided by the present invention Figure 1 The enlarged schematic diagram at II in.
[0018] In the figure: 1, test platform; 2, winding fixing assembly; 3, dual-trace oscilloscope; 4, bracket; 5, cross bar; 6, fixing frame; 7, fixing rod; 8, oscilloscope probe; 9, chute; 10, first spring; 11, fixing plate; 12, sliding plate; 13, second spring; 14, groove; 15, movable plate; 16, third spring; 17, first driving wheel; 18, motor; 19, second driving wheel; 20, transmission track; 21, sleeve rod; 22, support rod; 23, spherical connecting block; 24, support block; 25, spherical card slot. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following further describes the present invention in detail with reference to the drawings.
[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0021] Please refer to Figures 1-4The present invention provides a technical solution: a motor turn-to-turn short-circuit test device, comprising a test platform 1, a winding fixing component 2, and a two-wire oscilloscope 3. The winding fixing component 2 comprises a bracket 4 fixed on the test platform 1, a cross bar 5 is rotatably connected inside the bracket 4, two ends of the cross bar 5 are fixed with fixing frames 6, the fixing frames 6 are slidably connected with fixing rods 7 away from the ends of the cross bar 5, four fixing rods 7 are provided, and a driving member is also connected to the middle position of the cross bar 5 for driving the cross bar 5 to rotate. The two-wire oscilloscope 3 is placed on the test platform 1, the two-wire oscilloscope 3 is connected with an oscilloscope probe 8, and two oscilloscope probes 8 are placed under each fixing frame 6.
[0022] The fixing frame 6 is provided with a slide groove 9 for the fixing rod 7 to slide. A first spring 10 is fixed to one side of each fixing rod 7 , and the other end of the first spring 10 is fixed to the bottom of the slide groove 9 .
[0023] Among them, a fixed plate 11 is fixed on the fixed rod 7, and a sliding plate 12 is arranged relative to the fixed plate 11. The sliding plate 12 slides along the length direction of the fixed rod 7, and a second spring 13 is fixed to the end of the sliding plate 12 facing the fixed plate 11. The fixed rod 7 is provided with a groove 14 at the end away from the sliding plate 12, and a movable plate 15 is rotatably connected inside the groove 14. The movable plate 15 is fixed with a third spring 16 facing the groove 14.
[0024] The above-mentioned fixing frame 6 is used to fix the standard winding and the test winding respectively during the test. At the same time, the spacing between the four fixing rods 7 on the fixing frame 6 is adjustable, and can be used to test windings of different sizes. After the winding is placed, the fixing rod 7 is fixed to the inner side of the winding under the elastic action of the first spring 10. Since the first spring 10 is in a compressed state after the winding is sleeved on the outside of the four fixing rods 7, the first spring 10 has a force in the rebound direction to resist through the fixing rod 7 to stabilize the winding.
[0025] When testing the winding, in order to achieve testing of different turns, a driving member is provided to drive the winding to rotate. During the test, the oscilloscope probes 8 on both sides of the winding remain fixed, wherein the driving member includes a first transmission wheel 17 fixed to the outside of the cross bar 5, and also includes a motor 18 fixed to the test platform 1, the output end of the motor 18 is connected to a second transmission wheel 19, and a transmission belt 20 is connected between the first transmission wheel 17 and the second transmission wheel 19. By turning on the motor 18, the motor 18 drives the second transmission wheel 19 to rotate, and then drives the first transmission wheel 17 to drive the cross bar 5 to rotate through the transmission belt 20, drives the two fixed frames 6 to rotate, and then drives the winding to rotate, and changes different turns for testing.
[0026] In the test adjustment, since a sleeve rod 21 is sleeved outside the oscilloscope probe 8, a spherical connecting block 23 is fixed at the bottom of the sleeve rod 21, a support block 24 is arranged outside the corresponding spherical connecting block 23, a spherical card slot 25 is opened inside the support block 24, a support rod 22 is fixed at the bottom of the support block 24, the support rod 22 is fixed on the test platform 1, the direction of the oscilloscope probe 8 can be adjusted, and the sleeve rod 21 and the support block 24 are spherically connected. Therefore, the oscilloscope probe 8 can rotate in a 360° direction and can be adjusted in multiple directions, which is convenient for adjustment. During the test, the two oscilloscope probes 8 are adjusted to both sides of the winding and are in contact with both sides of the coil inside the winding for testing. The waveform diagrams generated after the test are displayed on the dual-trace oscilloscope 3, and then two waveform diagrams are displayed on the dual-trace oscilloscope 3. One is the test diagram of the standard winding, and the other is the test diagram of the winding under test. The two are compared to obtain the test result.
[0027] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.
[0028] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A motor turn-to-turn short circuit test device, characterized in that The motor turn-to-turn short circuit test equipment includes a test platform (1), a winding fixing component (2), and a dual-trace oscilloscope (3). The winding fixing component (2) includes a bracket (4) fixed on the test platform (1). A cross bar (5) is rotatably connected inside the bracket (4). Fixing frames (6) are fixed at both ends of the cross bar (5). Fixing rods (7) are slidably connected to the ends of the fixing frames (6) away from the cross bar (5). There are four fixing rods (7). A driving member is also connected to the middle position of the cross bar (5) for driving the cross bar (5) to rotate. The dual-trace oscilloscope (3) is placed on the test platform (1). The dual-trace oscilloscope (3) is connected to oscilloscope probes (8). Two oscilloscope probes (8) are placed below each fixing frame (6).
2. The inter-turn short circuit test device based on an electric machine according to claim 1, wherein, A chute (9) for the fixing rod (7) to slide is formed on the fixing frame (6). A first spring (10) is fixed on one side of each fixing rod (7), and the other end of the first spring (10) is fixed at the bottom of the chute (9).
3. The inter-turn short circuit test device for motor according to claim 2, wherein A fixing plate (11) is fixed on the fixing rod (7). A sliding plate (12) is arranged opposite to the fixing plate (11). The sliding plate (12) slides along the length direction of the fixing rod (7). A second spring (13) is fixed at the end of the sliding plate (12) facing the fixing plate (11). A groove (14) is formed at the end of the fixing rod (7) away from the sliding plate (12). An activity plate (15) is rotatably connected inside the groove (14). A third spring (16) is fixed at the end of the activity plate (15) facing the groove (14). The third spring (16).
4. The inter-turn short circuit test device based on an electric machine according to claim 1, characterized in that, The driving member includes a first transmission wheel (17) fixed outside the cross bar (5), and also includes a motor (18) fixed on the test platform (1). The output end of the motor (18) is connected to a second transmission wheel (19). A transmission track (20) is connected between the first transmission wheel (17) and the second transmission wheel (19).
5. The inter-turn short circuit test device for motor according to claim 1, characterized in that, A sleeve rod (21) is sleeved outside the oscilloscope probe (8). A spherical connecting block (23) is fixed at the bottom of the sleeve rod (21). A support block (24) is arranged outside the corresponding spherical connecting block (23). A spherical card slot (25) is formed inside the support block (24). A support rod (26) is fixed at the bottom of the support block (24). The support rod (26) is fixed on the test platform (1).