CN211669327U - Motor back electromotive force measuring device - Google Patents
Motor back electromotive force measuring device Download PDFInfo
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- CN211669327U CN211669327U CN201922370246.9U CN201922370246U CN211669327U CN 211669327 U CN211669327 U CN 211669327U CN 201922370246 U CN201922370246 U CN 201922370246U CN 211669327 U CN211669327 U CN 211669327U
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- output shaft
- electromotive force
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Abstract
The utility model discloses a motor back electromotive force measuring device, belonging to the technical field of motor testing, comprising a supporting structure, a driving motor is arranged on the supporting structure, and the position of the driving motor in the vertical direction is adjustable; the connecting structure comprises a universal transmission shaft and a connecting piece, one end of the universal transmission shaft is connected to the output shaft of the driving motor, the other end of the universal transmission shaft is connected to the connecting piece, and the connecting piece can be detachably connected to the output shaft of the motor to be detected; and the counter potential measuring structure is configured to measure the counter potential of the tested motor. The utility model provides a motor back electromotive force measuring device, through setting up universal drive shaft and connecting piece, universal drive shaft can eliminate driving motor's output shaft and the eccentric error of the output shaft of being surveyed the motor, reduces the centering time of the output shaft of being surveyed the motor and driving motor's output shaft to the realization is to the quick clamping and the dismantlement of being surveyed the motor output shaft, reduces the measuring time of motor back electromotive force, improves the efficiency of software testing of motor back electromotive force.
Description
Technical Field
The utility model relates to a motor test technical field especially relates to a motor back electromotive force measuring device.
Background
In recent years, the alternating current servo system is widely applied, and has incomparable advantages for upgrading the industry of the machine manufacturing industry and improving the enterprise competitiveness. Because the permanent magnet synchronous servo motor has the advantages of simple structure, small volume, high efficiency, high power factor, high torque coefficient, low rotational inertia, easy heat dissipation, easy maintenance and the like, the application field of the permanent magnet synchronous servo motor is more and more extensive along with the reduction of the price of a permanent magnet material, the improvement of the magnetic performance of the material and the appearance of a novel permanent magnet material.
With the wide research and application of permanent magnet synchronous motors, the performance requirements on permanent magnet synchronous motors are increasing day by day. Various parameters of the motor directly reflect various performances of the motor. Therefore, the method for collecting, analyzing, counting and processing various parameters of the permanent magnet synchronous motor is an important method for permanent magnet synchronous motor product design, improvement or research, and is also an indispensable link in permanent magnet synchronous motor production and maintenance.
The back electromotive force of the motor is one of important parameters of the permanent magnet synchronous motor, and component analysis of the back electromotive force is an important index for judging whether the motor meets the design and manufacture requirements. At present, a motor counter potential testing method generally comprises the steps of installing a motor on an integrated test bench for testing, wherein the test bench can complete the measurement of a plurality of parameters of the motor, but the test bench is complex in structure, the installation and disassembly steps of the motor are complex, and when the counter potential of the motor needs to be tested independently and repeatedly, time and labor are wasted, and the testing efficiency of the motor is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a motor back electromotive force measuring device to the adoption integrated test bench that exists among the solution prior art alone and carries out motor back electromotive force many times and measure, wastes time and energy, influences the efficiency of software testing's of motor problem.
As the conception, the utility model adopts the technical proposal that:
a counter-potential measuring device for an electric motor, comprising:
the supporting structure is provided with a driving motor, and the position of the driving motor in the vertical direction is adjustable;
the connecting structure comprises a universal transmission shaft and a connecting piece, one end of the universal transmission shaft is connected to the output shaft of the driving motor, the other end of the universal transmission shaft is connected to the connecting piece, and the connecting piece can be detachably connected to the output shaft of the motor to be tested;
a back electromotive force measuring structure configured to measure a back electromotive force of the motor under test.
Further, the connecting piece includes the three-jaw chuck, the three-jaw chuck connect in universal drive shaft, the three-jaw chuck is used for the centre gripping the output shaft of motor under test.
Further, the connecting structure further comprises a bushing, and the bushing is arranged between the clamping jaws of the three-jaw chuck and the output shaft of the tested motor.
Further, the supporting structure comprises a supporting frame and a driving structure arranged on the supporting frame, and the driving structure can drive the driving motor to slide relative to the supporting frame along the vertical direction.
Further, the driving structure comprises a screw rod, a nut sleeved on the screw rod and a driving piece for driving the screw rod to rotate, and the driving motor is fixedly connected with the nut.
Further, the support frame includes relative bottom plate and the roof that sets up, set up the confession on the roof the wear to establish the hole that the one end of lead screw passed, set up on the bottom plate and hold the blind hole of the lead screw other end, the driving piece is hand round, hand round connect in the lead screw one end.
Furthermore, the support frame also comprises two support rods which are connected between the bottom plate and the top plate and are oppositely arranged, and the driving motor can be arranged on the two support rods in a sliding manner.
Further, the counter electromotive force measuring device of the motor further comprises a base, and the supporting structure is detachably arranged on the base.
Further, the motor back electromotive force measuring device further comprises a supporting seat used for supporting the motor to be measured, and the supporting seat can be slidably arranged on the base.
Furthermore, one of the supporting seat and the base is provided with a sliding groove, and the other one is provided with a sliding rail capable of sliding along the sliding groove.
The utility model has the advantages that:
the utility model provides a motor back electromotive force measuring device, through setting up universal drive shaft and connecting piece, universal drive shaft can eliminate driving motor's output shaft and the eccentric error of the output shaft of being surveyed the motor, reduces the centering time of the output shaft of being surveyed the motor and driving motor's output shaft to the realization is to the quick clamping and the dismantlement of being surveyed the motor output shaft, reduces the measuring time of motor back electromotive force, improves the efficiency of software testing of motor back electromotive force. Moreover, by arranging the supporting structure, the position of the driving motor in the vertical direction can be adjusted, so that the counter electromotive force of the motor counter electromotive force measuring device is suitable for counter electromotive force tests of tested motors with different diameters.
Drawings
Fig. 1 is a schematic diagram of a counter-potential testing device for a motor provided by the present invention.
In the figure:
11. a base plate; 12. a top plate; 13. a support bar; 21. a lead screw; 22. a drive member; 31. a universal drive shaft; 32. a connecting member; 4. a back-emf measurement structure; 5. a base; 6. a supporting seat;
10. a drive motor; 20. and (6) a motor to be tested.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, the present embodiment provides a counter electromotive force measuring apparatus for a motor, which includes a supporting structure, a connecting structure, and a counter electromotive force measuring structure 4. Wherein, the supporting structure is provided with a driving motor 10, and the position of the driving motor 10 in the vertical direction is adjustable. The connecting structure comprises a universal transmission shaft 31 and a connecting piece 32, one end of the universal transmission shaft 31 is connected to the output shaft of the driving motor 10, the other end of the universal transmission shaft is connected to the connecting piece 32, and the connecting piece 32 can be detachably connected with the output shaft of the tested motor 20. The back electromotive force measuring structure 4 is used for measuring the back electromotive force of the motor 20 to be measured, and the back electromotive force measuring structure 4 is not particularly limited in this embodiment as long as the measurement of the back electromotive force of the motor 20 to be measured can be realized, for example, an oscilloscope.
Through adopting universal drive shaft 31, the installation of being convenient for, and can eliminate the eccentric error of the output shaft of driving motor 10 and the output shaft of being surveyed motor 20 in the connection process, under the low rotational speed low torque condition, avoid driving motor 10 and being surveyed motor 20 to produce the vibration when rotating, it can be understood, through adopting universal drive shaft 31, can reduce the work load when being centered by the output shaft of being surveyed motor 20 and the output shaft of driving motor 10 to a certain extent, be favorable to reducing the measuring time of motor back emf. In addition, the universal transmission shaft 31 can be detachably connected with the output shaft of the driving motor 10 and the connecting piece 32, so that the motor counter electromotive force measuring device can be detached when not used, and the storage and the transportation are convenient.
Specifically, the connecting member 32 includes a three-jaw chuck for holding an output shaft of the motor 20 under test. By adopting the three-jaw chuck, the output shaft of the tested motor 20 can be clamped and released quickly, the counter electromotive force measuring time of the tested motor 20 is shortened, and the measuring efficiency is improved. Optionally, in this embodiment, the three-jaw chuck may be matched with the external spline of the output shaft of the measured motor 20 to clamp the output shaft of the measured motor 20, and may also be matched with the internal spline of the output shaft of the measured motor 20 to clamp the output shaft of the measured motor 20, it may be understood that the three jaws are close to each other to clamp the outer circumference of the output shaft of the measured motor 20, and at this time, the three jaws are all matched with the external spline of the output shaft of the measured motor 20. Keep away from each other and all support the inner peripheral surface of tightly being surveyed the output shaft of motor 20 through three jack catch to the realization is to being connected of being surveyed the output shaft of motor 20, sets up the centre bore that can make three jack catch stretch into on being surveyed the output shaft of motor 20 this moment, and three jack catch all cooperatees with the internal spline of being surveyed the output shaft of motor 20.
Optionally, in order to avoid the jaw from damaging the output shaft of the tested motor 20, the connection structure further includes a bushing (not shown in the figure) disposed between the output shaft of the tested motor 20 and the jaw, and it is understood that the bushing can be sleeved on the output shaft of the tested motor 20 and can also extend into the central hole of the output shaft of the tested motor 20. Further, a rubber bushing may be disposed between the bushing and the output shaft of the motor 20 to further avoid damage to the output shaft of the motor 20.
Of course, in other embodiments, a hydraulic, pneumatic or electric control device may be used to connect or disconnect the universal transmission shaft 31 and the output shaft of the motor 20 to be measured, but this would increase the volume of the motor back electromotive force measuring device, would not facilitate the handling of the motor back electromotive force measuring device, and would increase the production cost of the motor back electromotive force measuring device.
It can be understood that the counter electromotive force test of the tested motor 20 with different diameters can be adapted by adjusting the position of the driving motor 10 in the vertical direction and connecting the output shaft of the tested motor 20 through the connecting member 32. In addition, the motor back electromotive force measuring device is compact in structure and convenient to carry and convey.
As shown in fig. 1, the supporting structure includes a supporting frame and a driving structure disposed on the supporting frame, and the driving structure can drive the driving motor 10 to slide relative to the supporting frame along a vertical direction. Specifically, the driving structure includes a screw 21, a nut sleeved on the screw 21, and a driving member 22 for driving the screw 21 to rotate, and the driving motor 10 is fixedly connected to the nut. The screw 21 is driven to rotate by the driving part 22, so that the driving motor 10 is driven to slide in the vertical direction relative to the support frame by the nut, and the position of the driving motor 10 in the vertical direction is adjusted. In this embodiment, the driving member 22 is a hand wheel, but in other embodiments, the driving member 22 may be a motor or the like.
Of course, in other embodiments, the driving structure may also be a structure using a cylinder or the like.
Above-mentioned support frame is including relative bottom plate 11 and the roof 12 that sets up, sets up the wear to establish the hole that supplies lead screw 21's one end to pass on the roof 12, sets up the blind hole that holds the lead screw 21 other end on the bottom plate 11, and hand wheel 22 is connected in lead screw 21 and is passed the one end in wear to establish the hole. The support frame further comprises two support rods 13 connected between the bottom plate 11 and the top plate 12 and oppositely arranged, and the driving motor 10 is slidably arranged on the two support rods 13. It can be understood that the lead screw 21 is rotated by manually rotating the hand wheel, so that the driving motor 10 is driven by the nut to slide relative to the support rod 13 in the vertical direction.
Optionally, the counter-electromotive force measuring device of the motor provided in this embodiment further includes a base 5, and the supporting structure is detachably disposed on the base 5. Specifically, first fixed orifices have been seted up on bottom plate 11, and the second fixed orifices has been seted up to the position that base 5 corresponds with first fixed orifices, and the fastener passes first fixed orifices and stretches into in the second fixed orifices, realizes being connected of bottom plate 11 and base 5, and in this embodiment, the fastener is preferred the bolt, and the second fixed orifices is for can with bolt matched with screw hole this moment. By adopting the bolt to fix the base 5 and the bottom plate 11, the bottom plate 11 and the base 5 can be detached when the motor back electromotive force measuring device is not used, so that the space occupied by the motor back electromotive force measuring device is reduced. It will be appreciated that in other embodiments the back emf measuring device may be provided without the base 5, in which case the support structure may be directly secured to a grooved iron base plate or table, in which case the support structure may have protrusions that extend into the grooves.
Optionally, the counter electromotive force measuring device of the motor provided by this embodiment further includes a supporting seat 6 for supporting the motor 20 to be measured, and the supporting seat 6 is slidably disposed on the base 5. Specifically, one of the support base 6 and the base 5 is provided with a slide groove, and the other is provided with a slide rail capable of sliding along the slide groove. Through setting up supporting seat 6, be convenient for adjust the relative bearing structure's of measured motor 20 position to further be convenient for the connection of three-jaw chuck and the output shaft of measured motor 20.
The counter electromotive force measuring device for the motor provided by the embodiment further comprises a motor controller, and the motor controller is electrically connected to the driving motor 10. The motor controller is used for controlling the driving motor 10 to start and driving the tested motor 20 to reach a preset rotating speed, and the preset rotating speed is maintained for a preset time, so that the counter electromotive force of the tested motor 20 is tested. After the test is completed, the motor controller controls the driving motor 10 to stop rotating.
In summary, the motor back electromotive force measuring device provided in this embodiment, through the arrangement of the universal transmission shaft 31 and the connecting member 32, the universal transmission shaft 31 can eliminate the eccentric error between the output shaft of the driving motor 10 and the output shaft of the tested motor 20, and reduce the centering time between the output shaft of the tested motor 20 and the output shaft of the driving motor 10, thereby realizing the rapid clamping and dismounting of the output shaft of the tested motor 20, reducing the measuring time of the motor back electromotive force, and improving the testing efficiency of the motor back electromotive force. Moreover, by arranging the supporting structure, the position of the driving motor 10 in the vertical direction can be adjusted, so that the counter electromotive force measuring device of the motor is suitable for counter electromotive force tests of tested motors 20 with different diameters.
In addition, the motor back electromotive force measuring device is compact in structure, small in occupied area and convenient to carry and convey, and therefore the position of the motor back electromotive force measuring device can be flexibly adjusted. Moreover, when the motor back electromotive force testing device is not used, the supporting structure, the universal transmission shaft 31 and the connecting piece 32 can be disassembled, so that the storage or the transportation is convenient, and the occupied area of the motor back electromotive force testing device is further reduced.
The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A counter-potential measuring device for an electric motor, comprising:
the supporting structure is provided with a driving motor (10), and the position of the driving motor (10) in the vertical direction is adjustable;
the connecting structure comprises a universal transmission shaft (31) and a connecting piece (32), one end of the universal transmission shaft (31) is connected to the output shaft of the driving motor (10), the other end of the universal transmission shaft is connected to the connecting piece (32), and the connecting piece (32) can be detachably connected to the output shaft of the motor (20) to be tested;
a back-emf measurement structure (4) configured to measure a back-emf of the measured motor (20).
2. A motor back-emf measuring device according to claim 1, wherein said coupling member (32) comprises a three-jaw chuck connected to said universal drive shaft (31) for gripping an output shaft of said motor under test (20).
3. The motor back-emf measuring device of claim 2, wherein the coupling structure further comprises a bushing disposed between the jaws of the three-jaw chuck and the output shaft of the motor under test (20).
4. The motor back electromotive force measuring device according to claim 1, wherein the supporting structure comprises a supporting frame and a driving structure disposed on the supporting frame, the driving structure is capable of driving the driving motor (10) to slide relative to the supporting frame in a vertical direction.
5. The motor back electromotive force measuring device according to claim 4, wherein the driving structure comprises a screw (21), a nut sleeved on the screw (21), and a driving member (22) for driving the screw (21) to rotate, and the driving motor (10) is fixedly connected to the nut.
6. The motor back electromotive force measuring device of claim 5, wherein the support frame comprises a bottom plate (11) and a top plate (12) which are oppositely arranged, a through hole for one end of the lead screw (21) to pass through is formed in the top plate (12), a blind hole for accommodating the other end of the lead screw (21) is formed in the bottom plate (11), the driving piece (22) is a hand-operated wheel, and the hand-operated wheel is connected to the one end of the lead screw (21).
7. The motor back-emf measuring device of claim 6, wherein said support frame further comprises two support rods (13) connected between said bottom plate (11) and said top plate (12) and disposed opposite each other, said drive motor (10) being slidably disposed on said two support rods (13).
8. A motor back-emf measuring device according to claim 1, further comprising a base (5), wherein said support structure is removably disposed on said base (5).
9. The motor back electromotive force measuring device according to claim 8, further comprising a support base (6) for supporting the motor under test (20), wherein the support base (6) is slidably disposed on the base (5).
10. The motor back-emf measuring device of claim 9, wherein one of said support base (6) and said base (5) is provided with a slide slot, and the other is provided with a slide rail capable of sliding along said slide slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922370246.9U CN211669327U (en) | 2019-12-25 | 2019-12-25 | Motor back electromotive force measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922370246.9U CN211669327U (en) | 2019-12-25 | 2019-12-25 | Motor back electromotive force measuring device |
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| CN211669327U true CN211669327U (en) | 2020-10-13 |
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| CN201922370246.9U Active CN211669327U (en) | 2019-12-25 | 2019-12-25 | Motor back electromotive force measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281651A (en) * | 2021-06-02 | 2021-08-20 | 杭州长牛科技有限公司 | Method for rapidly measuring back electromotive force coefficient of synchronous traction machine |
| CN115598529A (en) * | 2022-11-20 | 2023-01-13 | 常州三协电机股份有限公司（Cn） | Counter potential testing device for stepping motor |
-
2019
- 2019-12-25 CN CN201922370246.9U patent/CN211669327U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281651A (en) * | 2021-06-02 | 2021-08-20 | 杭州长牛科技有限公司 | Method for rapidly measuring back electromotive force coefficient of synchronous traction machine |
| CN115598529A (en) * | 2022-11-20 | 2023-01-13 | 常州三协电机股份有限公司（Cn） | Counter potential testing device for stepping motor |
| CN115598529B (en) * | 2022-11-20 | 2023-03-10 | 常州三协电机股份有限公司 | Counter potential testing device for stepping motor |
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