Motor stator slot fullness rate detection tool

Abstract

The utility model relates to the technical field of motor detection, and particularly discloses a motor stator slot fullness rate detection tool, which is used for pre-detecting the slot fullness rate of a stator slot of a motor and comprises a detection table, a stator slot type plate is arranged on the detection table, and light transmission detection mechanisms are arranged at two ports of the stator slot type plate. The stator groove type plate is manufactured according to the shape and the size of a stator groove, the width and the type of the stator groove are completely the same as those of the stator groove, and detection of the groove fullness rate of an inner cavity of the stator groove type plate is equal to detection of the groove fullness rate of the stator groove. During detection, wires are sequentially placed into the inner cavity of the stator groove type plate according to the wire inserting standard, then the groove fullness rate of the stator groove type plate is detected by using the light transmission detection mechanism, the groove fullness rate of the stator groove with the corresponding groove width and groove type can be obtained, and when the groove fullness rate accords with the wire inserting standard range, the actual wire inserting operation can be carried out. At the moment, under the condition that the slot fullness factor is consistent, the wire can be inevitably embedded into the stator slot, and the problem that the wire cannot be embedded is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of motor detection, and in particular to a motor stator slot fullness detection tool. Background Art

[0002] Motors are widely used in all walks of life. There are windings in the motor stator. The three-phase windings are embedded in the stator slots according to certain rules to provide a stator magnetic field for the motor. The traditional asynchronous motor stator winding utilization rate is low and the slot fill rate is low, generally 60%-70%. Therefore, in actual production, only a rough calculation is made through the slot fill rate calculation formula, and the winding and wire embedding processes can be carried out if it does not exceed 70%.

[0003] With the development of technology, permanent magnet motors have emerged in large numbers. Since the rotor of a permanent magnet motor provides a constant magnetic field for the permanent magnet and the rotor magnetic field intensity is high, the magnetic field generated by the stator winding must match it. The number of effective windings and turns in the stator core slots of the permanent magnet motor is large, so the slot fill rate is higher than that of an asynchronous motor, generally 75%-80% or even higher, and some even reach more than 85%.

[0004] If only the formula calculation method is used to calculate the slot fill rate, the formula calculation method is: according to the slot size, the stator slot is divided into several small trapezoids, semicircles, and small rectangles, and the areas are calculated respectively. Then the total areas are added up to get the stator slot area As. When calculating the copper wire size, the diameter d of the round copper wire is equivalent to a square of d*d. If multiple wires are wound in parallel, multiply them by N1, N2, etc., so the slot fill rate S1=N1*N2*d*d / As is obtained.

[0005] When the slot full rate is high, but in the actual wire embedding process, the round copper wires are arranged in order one by one. When the row can hold an integer number of copper wires, the remaining space is insufficient to put in another round copper wire. At this time, the remaining space cannot meet the demand, but is included in the effective slot area. Therefore, in actual operation, the calculated slot full rate will be less than 75% and the wire cannot be embedded. Utility Model Content

[0006] In order to pre-detect the slot fill rate of a motor stator slot, thereby facilitating the smooth implementation of actual wire embedding, the present application provides a motor stator slot fill rate detection tool.

[0007] The present application provides a motor stator slot full rate detection tool, which adopts the following technical solution:

[0008] A motor stator slot full rate detection tool is used for pre-detecting the slot full rate of the motor's stator slots, comprising a detection platform, on which a stator slot plate is provided corresponding to the shape and size of the stator slot, the upper side and both ends of the stator slot plate are both opened and used for inserting wires to be detected, and two ports of the stator slot plate are provided with a light transmission detection mechanism for detecting the slot full rate of the stator slot plate.

[0009] By adopting the above technical solution, the stator slot plate is made according to the shape and size of the stator slot, and is completely the same as the slot width and slot shape of the stator slot. Testing the slot fill rate of the inner cavity of the stator slot plate is equivalent to testing the slot fill rate of the stator slot.

[0010] During the inspection, the cavity cross-sectional area of ​​the stator slot plate is first inspected using a light transmission inspection mechanism, and then the wires are placed into the inner cavity of the stator slot plate in sequence according to the wire embedding standard, and the slot fill rate of the stator slot plate is inspected again using the light transmission inspection mechanism, and the slot fill rate of the stator slot corresponding to the slot width and slot type can be obtained.

[0011] When the slot fill rate meets the wire insertion standard range, the actual wire insertion operation can be carried out. At this time, if the slot fill rate meets the standard range, the wire can definitely be embedded in the stator slot, and the problem of being unable to insert the wire due to the slot fill rate meeting the standard range will not occur.

[0012] Optionally, the light transmission detection mechanism includes a laser sensor, a receiver and a control panel arranged on the detection platform, the laser sensor and the receiver are respectively located at two ports of the stator slot plate and arranged opposite the end portions, and the control panel is electrically connected to the laser sensor and the receiver respectively.

[0013] By adopting the above technical solution, the laser emitted by the laser sensor can enter from one end of the stator slot plate, pass through the inner cavity of the stator slot plate and then pass out from the other end. Finally, the laser signal is received by the receiver and transmitted to the control panel, thereby calculating the light-transmitting area of ​​the stator slot plate. Then, the wire to be detected is embedded in the stator slot plate in sequence according to the wire embedding rules, and the laser sensor is used for laser measurement again. The receiver receives the laser signal again and transmits the signal to the control panel to calculate the light-transmitting area at this time. The calculation formula for the slot fill rate is: the ratio of the difference between the two light-transmitting areas to the first light-transmitting area.

[0014] Optionally, the stator slot plate includes two support inclined plates which are arranged obliquely and close to each other at the top ends, and two port plates which are integrally arranged at the top ends of the two support inclined plates, the bottoms of the two support inclined plates are slidably abutted against the upper surface of the detection platform, and the upper surface of the detection platform and the two support inclined plates and the two port plates are jointly arranged to form an inner cavity of the stator slot plate;

[0015] The detection platform is provided with an adjustment mechanism for driving the two support inclined plates to move toward or away from each other, and the adjustment mechanism can adjust the slot width of the stator slot plate to correspond to stator slots of different slot widths.

[0016] By adopting the above technical solution, when the slot widths of the stator slots that need to be embedded are different, the spacing between the two supporting inclined plates can be adjusted by the adjustment mechanism, so that the slot width of the stator slot plate is adjusted to be the same as the stator slot, thereby facilitating the pre-detection of the slot fill rates of the stator slots with different slot widths.

[0017] Optionally, the adjustment mechanism includes two telescopic parts correspondingly arranged on both sides of the two supporting inclined plates, the two telescopic parts are installed on the detection platform and the telescopic ends are respectively fixedly connected to the corresponding side edges of the supporting inclined plates, the two telescopic parts are electrically connected to the control panel, and can respectively drive the two supporting inclined plates to move towards or away from each other.

[0018] By adopting the above technical solution, when it is necessary to adjust the distance between the two supporting inclined plates, the control panel is operated to extend or shorten the two telescopic parts, thereby driving the two supporting inclined plates to move closer or farther away until the width is the same as the corresponding stator slots.

[0019] Optionally, a light-shielding cover for covering the stator slot plate, the laser sensor and the receiver is provided on the detection platform, and the light-shielding cover abuts against the top of the port plate when covering.

[0020] By adopting the above technical solution, the light-isolating cover can isolate the external environment, thereby reducing the impact of the external environment on the operation of the laser sensor and the receiver.

[0021] Optionally, a blocking mechanism is provided in the light-isolating cover for blocking laser light reaching the receiver from outside the stator slot plate.

[0022] By adopting the above technical solution, since the area irradiated by the laser sensor may be larger than the cross-sectional area of ​​the inner cavity of the stator slot plate, the blocking mechanism can block the laser that hits the outside of the stator slot plate, thereby preventing the laser outside the stator slot plate from being received by the receiver and affecting the measurement result.

[0023] Optionally, the blocking mechanism includes a multi-stage telescopic plate and an elastic member, and the multi-stage telescopic plate is respectively provided with two groups corresponding to the two supporting inclined plates, and is respectively located on the side away from each other of the two supporting inclined plates, and the two multi-stage telescopic plates are installed in the light shield at intervals, and the elastic member is correspondingly arranged in the multi-stage telescopic plate, and can drive the two groups of the multi-stage telescopic plates to elastically abut against the side edges of the corresponding supporting inclined plates.

[0024] By adopting the above technical solution, when measurement is required, the light shield is turned upside down on the test bench. At this time, the two supporting inclined plates push the corresponding two groups of multi-stage telescopic plates, so that the two groups of multi-stage telescopic plates are compressed to abut against the side edges of the supporting inclined plates, thereby blocking the space between the light shield and the supporting inclined plates to prevent the laser emitted by the laser sensor from passing through this space.

[0025] Optionally, the telescopic ends of the multi-stage telescopic plate are configured to be adaptive inclined surfaces corresponding to the supporting inclined plate and the port plate.

[0026] By adopting the above technical solution, when the end of the multi-stage telescopic plate abuts against the supporting inclined plate, the telescopic end of the multi-stage telescopic plate can perfectly abut and fit with the side walls of the supporting inclined plate and the port plate, so that the gap between the end of the multi-stage telescopic plate and the supporting inclined plate and the port plate is very small. At this time, it is difficult for the laser to pass through the gap, thereby reducing the impact on the measurement results.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] The stator slot plate is made according to the shape and size of the stator slot, and is exactly the same as the slot width and slot shape of the stator slot. Testing the slot fill rate of the inner cavity of the stator slot plate is equivalent to testing the slot fill rate of the stator slot.

[0029] During the inspection, the cavity cross-sectional area of ​​the stator slot plate is first inspected using a light transmission inspection mechanism, and then the wires are sequentially placed into the inner cavity of the stator slot plate according to the wire embedding standard, and the slot fill rate of the stator slot plate is inspected again using the light transmission inspection mechanism, so that the slot fill rate of the stator slot corresponding to the slot width and slot type can be obtained;

[0030] When the pre-measured slot fill rate meets the wire-insertion standard range, the actual wire-insertion operation can be carried out. At this time, if the slot fill rate meets the standard, the conductor can be inserted into the stator slot, and there will be no problem of being unable to insert the wire when the slot fill rate meets the standard.

[0031] When the slot widths of the stator slots to be embedded are different, the spacing between the two supporting inclined plates can be adjusted by the adjustment mechanism, so that the slot width of the stator slot plate is adjusted to be the same as that of the stator slot, thereby facilitating the pre-detection of the slot fill rates of the stator slots of different slot widths;

[0032] The light-shielding cover and the blocking mechanism can reduce the influence of other external factors on the slot fill rate measurement during the measurement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments 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 creative work.

[0034] Figure 1 It is a schematic diagram of the overall structure of the detection tool in the embodiment of the present application;

[0035] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the detection tool;

[0036] Figure 3 yes Figure 2 A schematic diagram of a part of the structure of the detection tool;

[0037] Figure 4 yes Figure 1 Schematic diagram of the cross section of the detection tool.

[0038] Figure numerals: 1. detection table; 2. stator slot plate; 21. support inclined plate; 22. port plate; 3. light transmission detection mechanism; 31. laser sensor; 32. receiver; 33. control panel; 4. telescopic part; 5. light shield; 6. blocking mechanism; 61. multi-stage telescopic plate. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-4 , further details of this application are given.

[0040] An embodiment of the present application discloses a tool for detecting the stator slot fill rate of a motor.

[0041] A motor stator slot full rate detection tool, reference Figure 1 and Figure 2 , used for pre-detecting the slot fill rate of the stator slot of the motor, including a detection platform 1, on which a stator slot plate 2 is arranged corresponding to the shape and size of the stator slot, the upper side and both ends of the stator slot plate 2 are opened and used for inserting the wire to be detected, and the two ends of the stator slot plate 2 are provided with a light transmission detection mechanism 3 for detecting the slot fill rate of the stator slot plate 2.

[0042] The stator slot plate 2 is made according to the shape and size of the stator slot, and is completely identical to the slot width and slot shape of the stator slot. Testing the slot fill rate of the inner cavity of the stator slot plate 2 is equivalent to testing the slot fill rate of the stator slot.

[0043] During the inspection, the light transmission detection mechanism 3 is first used to detect the cavity cross-sectional area of ​​the stator slot plate 2, and then the wires are placed into the inner cavity of the stator slot plate 2 in sequence according to the wire embedding standard, and the slot fill rate of the stator slot plate 2 is detected again using the light transmission detection mechanism 3, so that the slot fill rate of the stator slot corresponding to the slot width and slot type can be obtained.

[0044] When the slot fill rate meets the wire insertion standard range, the actual wire insertion operation can be carried out. At this time, if the slot fill rate meets the standard range, the wire can definitely be embedded in the stator slot, and the problem of being unable to insert the wire due to the slot fill rate meeting the standard range will not occur.

[0045] Specifically, refer to Figure 2 , Figure 3 and Figure 4 The stator slot plate 2 includes two support inclined plates 21 which are arranged obliquely and close to each other at the top ends, and two port plates 22 which are integrally arranged at the top ends of the two support inclined plates 21. The bottoms of the two support inclined plates 21 are slidably abutted against the upper surface of the detection platform 1. The upper surface of the detection platform 1 and the two support inclined plates 21 and the two port plates 22 are jointly arranged to form an inner cavity of the stator slot plate 2.

[0046] The detection platform 1 is provided with an adjustment mechanism for driving the two supporting inclined plates 21 to move toward or away from each other. The adjustment mechanism can adjust the slot width of the stator slot plate 2 to correspond to stator slots of different slot widths.

[0047] Reference Figure 2 and Figure 3 The light transmission detection mechanism 3 includes a laser sensor 31, a receiver 32 and a control panel 33 arranged on the detection platform 1. The laser sensor 31 and the receiver 32 are respectively located on both sides of the ends of the two supporting inclined plates 21, and are respectively arranged opposite to the ports between the two supporting inclined plates 21. The control panel 33 is electrically connected to the laser sensor 31 and the receiver 32 respectively.

[0048] Reference Figure 2 , Figure 3 and Figure 4 The adjustment mechanism includes two telescopic members 4 correspondingly arranged on both sides of the two supporting inclined plates 21. The telescopic members 4 adopt electric telescopic rods. The two electric telescopic rods are installed on the detection platform 1 and the telescopic ends are respectively fixedly connected to the corresponding side edges of the supporting inclined plates 21. The two electric telescopic rods are electrically connected to the control panel 33 and can respectively drive the two supporting inclined plates 21 to move towards or away from each other.

[0049] Furthermore, in order to reduce the impact of external factors on the test results, refer to Figure 1 , Figure 2 and Figure 4A light-shielding cover 5 for covering the stator slot plate 2, the laser sensor 31 and the receiver 32 is provided on the detection table 1. The inner top wall of the light-shielding cover 5 can cap the two port plates 22. A blocking mechanism 6 for blocking the laser reaching the receiver 32 from outside the stator slot plate 2 is provided inside the light-shielding cover 5. The light-shielding cover 5 abuts against the top of the supporting inclined plate 21 when covering.

[0050] During the detection process, the laser emitted by the laser sensor 31 can pass through the cavity enclosed by the two supporting inclined plates 21, the two port plates 22, the detection platform 1 and the light shield 5, and then reach the receiver 32. The receiver 32 transmits the signal to the control panel 33, thereby detecting the cross-sectional area of ​​the stator slot plate 2. The slot fill rate is calculated based on the cross-sectional area obtained by the presence or absence of the wire in the cavity.

[0051] Reference Figure 1 , Figure 2 and Figure 4 The blocking mechanism 6 includes a multi-stage telescopic plate 61 and an elastic member. The multi-stage telescopic plate 61 is provided with two groups corresponding to the two supporting inclined plates 21, and is respectively located on the side of the two supporting inclined plates 21 away from each other. The two multi-stage telescopic plates 61 are installed in the light isolation cover 5 at intervals;

[0052] The elastic members are arranged correspondingly in the multi-stage telescopic plates 61, and multiple groups of elastic members are arranged. In the present embodiment, the elastic members are springs, and the springs can drive the two groups of multi-stage telescopic plates 61 to elastically abut against the sides of the corresponding supporting inclined plates 21, and the telescopic ends of the multi-stage telescopic plates 61 are arranged into matching inclined surfaces corresponding to the supporting inclined plates 21 and the port plates 22.

[0053] The light shield 5 can isolate the external environment, reduce the impact of the external environment on the operation of the laser sensor 31 and the receiver 32, and can cap the two port plates 22. The telescopic end of the multi-stage telescopic plate 61 can perfectly abut and fit with the inclined surfaces of the supporting inclined plate 21 and the port plate 22, so that the gap between the end of the multi-stage telescopic plate 61 and the inclined surfaces of the supporting inclined plate 21 and the port plate 22 is very small, and it is difficult for the laser to pass through the space between the stator slot plate 2 and the light shield 5. The two work together to reduce the measurement error during detection, thereby improving the accuracy of detection.

[0054] The implementation principle of the motor stator slot full rate detection tool in the embodiment of the present application is as follows: during the detection, the control panel 33 is used to control the electric telescopic rod to drive the two supporting inclined plates 21 to move to the corresponding position, so that the space enclosed by the two supporting inclined plates 21 and the upper surface of the detection platform 1 is consistent with the shape and size of the stator slot;

[0055] The light shield 5 is placed upside down on the outside of the stator slot plate 2, and the laser sensor 31 is controlled by the control panel 33 to emit laser light. The laser light passes through the inner cavity of the stator slot plate 2 and reaches the receiver 32. The receiver 32 transmits the received signal to the control panel 33, and the control panel 33 calculates the light transmission area through the stator slot plate 2.

[0056] Remove the light-shielding cover 5, embed the wire to be detected into the inner cavity of the stator slot plate 2 according to the embedding rule, then re-flip the light-shielding cover 5 outside the stator slot plate 2, and emit laser light through the laser sensor 31 again. The laser light passes through the gaps between the wires and between the wires and the stator slot plate 2 to reach the receiver 32. The receiver 32 transmits the signal to the control panel 33 again, and the control panel 33 calculates the light-transmitting area at this time.

[0057] Calculate the difference between the two light transmission areas. The ratio of this difference to the first light transmission area is the slot filling rate of the inner cavity of the stator slot plate 2, that is, the slot filling rate of the stator slot;

[0058] By pre-simulating the wire embedding and the simulated measurement of the slot filling rate of the stator slot plate 2, the slot filling rate of the actual stator slot can be understood and the wire embedding can be smoothly performed, which is convenient for the subsequent actual wire embedding operation.

[0059] The above are all optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A motor stator slot full rate detection tool, used for pre-detecting the slot full rate of the motor stator slot, characterized in that: The invention comprises a detection platform (1), on which a stator slot plate (2) is arranged in a shape and size corresponding to a stator slot, the stator slot plate (2) is provided with openings on the upper side and both ends thereof and is used for inserting a wire to be detected, and two ports of the stator slot plate (2) are provided with a light transmission detection mechanism (3) for detecting the slot fill rate of the stator slot plate (2).

2. A motor stator slot fullness detection tool according to claim 1, characterized in that: The light transmission detection mechanism (3) comprises a laser sensor (31), a receiver (32) and a control panel (33) arranged on the detection platform (1); the laser sensor (31) and the receiver (32) are respectively located at two ports of the stator slot plate (2) and arranged directly opposite the end portions; and the control panel (33) is respectively electrically connected to the laser sensor (31) and the receiver (32).

3. A motor stator slot fullness detection tool according to claim 2, characterized in that: The stator slot plate (2) comprises two support inclined plates (21) which are arranged obliquely and whose top ends are close to each other, and two port plates (22) which are integrally arranged at the top ends of the two support inclined plates (21); the bottoms of the two support inclined plates (21) are slidably abutted against the upper surface of the detection platform (1); the upper surface of the detection platform (1) and the two support inclined plates (21) and the two port plates (22) are jointly arranged to form an inner cavity of the stator slot plate (2); The detection platform (1) is provided with an adjustment mechanism for driving the two supporting inclined plates (21) to move towards or away from each other, and the adjustment mechanism can adjust the slot width of the stator slot plate (2) to correspond to stator slots of different slot widths.

4. A motor stator slot fullness detection tool according to claim 3, characterized in that: The adjustment mechanism comprises two telescopic members (4) correspondingly arranged on both sides of the two supporting inclined plates (21); the two telescopic members (4) are mounted on the detection platform (1) and the telescopic ends are respectively fixedly connected to the corresponding side edges of the supporting inclined plates (21); the two telescopic members (4) are electrically connected to the control panel (33) and can respectively drive the two supporting inclined plates (21) to move in a direction of approaching or moving away from each other.

5. The motor stator slot fullness detection tool according to claim 3, characterized in that: The detection platform (1) is provided with a light-shielding cover (5) for covering the stator slot plate (2), the laser sensor (31) and the receiver (32); the light-shielding cover (5) abuts against the top of the port plate (22) when the cover is provided.

6. A motor stator slot fullness detection tool according to claim 5, characterized in that: A blocking mechanism (6) for blocking laser light reaching the receiver (32) from outside the stator slot plate (2) is arranged inside the light blocking cover (5).

7. A motor stator slot fullness detection tool according to claim 6, characterized in that: The blocking mechanism (6) comprises a multi-stage telescopic plate (61) and an elastic member. Two groups of the multi-stage telescopic plates (61) are respectively arranged corresponding to the two supporting inclined plates (21), and are respectively located on the side of the two supporting inclined plates (21) that are away from each other. The two multi-stage telescopic plates (61) are installed in the light isolation cover (5) at intervals. The elastic member is correspondingly arranged in the multi-stage telescopic plates (61), and can drive the two groups of the multi-stage telescopic plates (61) to elastically abut against the side edges of the corresponding supporting inclined plates (21).

8. A motor stator slot fullness detection tool according to claim 7, characterized in that: The telescopic ends of the multi-stage telescopic plate (61) are arranged to form matching inclined surfaces corresponding to the supporting inclined plate (21) and the port plate (22).

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