Automatic motor parameter testing equipment

Abstract

The utility model discloses automatic motor parameter testing equipment, which comprises a testing rack, an instrument rack and a tested motor, and is characterized in that the testing rack is provided with a power mechanism, a power transmission mechanism, a shaft tail bearing seat and a jig mandrel; the power mechanism comprises a power shaft and a power assembly. The power transmission mechanism comprises a transmission shaft and an electromagnetic brake. One end of the jig mandrel is rotationally connected with the shaft tail bearing seat, and the other end of the jig mandrel is connected with the transmission shaft; a jig mounting seat is arranged on the outer side of the jig core shaft, and a tested rotor is connected with the jig core shaft; an industrial control computer, an instrument assembly and a printer are arranged on the test rack, and the instrument assembly comprises a gauss meter, an LCR tester, a digital oscilloscope, a power analyzer and an alternating current programming power supply. According to the utility model, parameters such as inductance, induced voltage, magnetic flux and the like of the motor can be tested and recorded automatically, reports are generated, the production cost is reduced, the detection speed and precision are improved, and the detection result is accurate and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of automation, in particular to an automatic motor parameter testing device. Background Art

[0002] In the prior art, motor parameter testing is performed by manually operating various mechanical components and instruments to detect various parameters of the motor, and some parameters need to be recorded manually; since the motor detection itself has many items, the detection operation process is very complicated, the detection accuracy is difficult to control, the detection speed is slow and it is very easy to make mistakes, which cannot meet the requirements of the prior art.

[0003] Therefore, it is urgent to design an automated motor parameter testing equipment that can automatically complete the testing and recording of motor parameters such as inductance, induced voltage, magnetic flux, and generate reports, reduce production costs, improve detection speed and accuracy, and ensure accurate and reliable detection results. Utility Model Content

[0004] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0005] An automated motor parameter testing device, comprising a test frame, an instrument frame and a motor to be tested, characterized in that a power mechanism, a power transmission mechanism, a shaft tail bearing seat and a fixture mandrel are coaxially arranged on the test frame from left to right in sequence;

[0006] The power mechanism includes a power shaft and a power assembly for driving the power shaft to rotate, and the power transmission mechanism includes a transmission shaft and an electromagnetic brake arranged on the transmission shaft;

[0007] One end of the fixture mandrel is rotatably connected to the shaft tail bearing seat, and the other end is connected to the transmission shaft, and one end of the power shaft is connected to the transmission shaft;

[0008] The motor under test comprises a stator under test and a rotor under test, a fixture mounting seat for mounting the stator under test is arranged on the outer side of the fixture core shaft, and the rotor under test is detachably connected to the fixture core shaft;

[0009] The test rack is provided with an industrial computer and an instrument component and a printer electrically connected to the industrial computer, wherein the instrument component includes a gauss meter, an LCR tester, a digital oscilloscope, a power analyzer and an AC programming power supply;

[0010] The measured motor, electromagnetic brake and power assembly are electrically connected to the industrial control computer.

[0011] Preferably, the power mechanism further comprises a rotary encoder electrically connected to the industrial computer, and one end of the power shaft away from the transmission shaft is transmission-connected to the rotary encoder.

[0012] Preferably, a first adjustment mechanism is provided between the shaft tail bearing seat and the fixture mounting seat and the test frame, and the first adjustment mechanism is used to adjust the distance between the shaft tail bearing seat and the fixture mounting seat and one end of the transmission shaft away from the power shaft.

[0013] Preferably, the first adjustment mechanism comprises a connecting plate, a first sliding assembly and a first locking assembly;

[0014] The shaft tail bearing seat and the fixture mounting seat are arranged on a connecting plate, and the connecting plate is connected to the test frame through a first sliding component, and the first locking component is located between the connecting plate and the first sliding component.

[0015] Preferably, the first adjustment mechanism further includes a connection plate position adjustment component;

[0016] The connecting plate position adjustment assembly includes a screw, a screw connecting seat, a nut mounting seat and a handle. The two ends of the screw are only rotatably connected to the screw connecting seat through bearings, the nut mounting seat is connected to the connecting plate, the screw is threadedly connected to the nut mounting seat, and the end of the screw away from the connecting plate is connected to the handle.

[0017] Preferably, a second adjustment mechanism is provided between the shaft tail bearing seat and the connecting plate, and the second adjustment mechanism is used to adjust the distance between the shaft tail bearing seat and the fixture mounting seat.

[0018] Preferably, the second adjustment mechanism includes a second sliding assembly and a second locking assembly disposed between the shaft tail bearing seat and the second sliding assembly.

[0019] Preferably, the power mechanism further comprises a power bearing seat connected to the test frame, and the power shaft is rotatably connected to the power bearing seat; the power transmission mechanism further comprises a transmission bearing seat connected to the test frame, and the transmission shaft is rotatably connected to the transmission bearing seat;

[0020] The power assembly includes a servo motor that is coaxially arranged with the power shaft. The servo motor is arranged on a power bearing seat. A driven wheel is arranged on the power shaft. A driving wheel is arranged on the driving shaft of the servo motor. The driving wheel and the driven wheel are connected by a synchronous belt transmission.

[0021] Preferably, the test frame is provided with a protective cover on the outside of the power mechanism, the power transmission mechanism and the shaft tail bearing seat.

[0022] Preferably, it further comprises an air cooler disposed on the test rack, wherein the cooling air outlet of the air cooler is located above the fixture mounting seat.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The utility model can automatically complete the testing and recording of parameters such as the inductance, induced voltage, magnetic flux, etc. of the motor, and generate a report, thereby reducing production costs, improving the detection speed and accuracy, and the detection results are accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the first adjusting mechanism and the second adjusting mechanism in the utility model;

[0027] Figure 3 It is a structural schematic diagram of the power mechanism and the power transmission mechanism in the utility model;

[0028] Figure 4 It is a partial structural schematic diagram of the utility model;

[0029] Among them: first adjustment mechanism 1, second adjustment mechanism 2, measured motor 3, power mechanism 4, power transmission mechanism 5, shaft tail bearing seat 6, fixture mandrel 7, industrial computer 8, instrument assembly 9, fixture mounting seat 10, printer 20, taper sleeve 30, coupling 40, semicircular block 50, protective cover 60, air cooler 70, connecting plate 11, first sliding assembly 12, first locking assembly 13, connecting plate position adjustment assembly 14, second sliding assembly 21, second locking assembly 22, measured stator 31, measured rotor 32, dynamic Force shaft 41, power assembly 42, rotary encoder 43, power bearing seat 44, transmission shaft 51, electromagnetic brake 52, transmission bearing seat 53, Gaussmeter 91, LCR tester 92, digital oscilloscope 93, power analyzer 94, AC programming power supply 95, test rack 100, instrument rack 200, screw 141, screw connecting seat 142, nut mounting seat 143, handle 144, servo motor 421, driven wheel 422, driving wheel 423, synchronous belt 424, cover 601, and swing door 602. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0034] like Figure 1-4 As shown, an automated motor parameter testing device comprises a test frame 100, an instrument frame 200 and a motor to be tested 3, wherein a power mechanism 4, a power transmission mechanism 5, a shaft tail bearing seat 6 and a fixture mandrel 7 are coaxially arranged on the test frame 100 from left to right in sequence;

[0035] The power mechanism 4 includes a power shaft 41 and a power assembly 42 for driving the power shaft 41 to rotate, and the power transmission mechanism 5 includes a transmission shaft 51 and an electromagnetic brake 52 disposed on the transmission shaft 51;

[0036] One end of the jig mandrel 7 is rotatably connected to the shaft tail bearing seat 6, and the other end is connected to the transmission shaft 51, and one end of the power shaft 41 is connected to the transmission shaft 51;

[0037] The motor under test 3 comprises a stator under test 31 and a rotor under test 32. A fixture mounting seat 10 for mounting the stator under test 31 is disposed on the outer side of the fixture core shaft 7. The rotor under test 32 is detachably connected to the fixture core shaft 7.

[0038] The test rack 100 is provided with an industrial computer 8 and an instrument assembly 9 and a printer 20 electrically connected to the industrial computer 8, wherein the instrument assembly 9 includes a gauss meter 91, an LCR tester 92, a digital oscilloscope 93, a power analyzer 94 and an AC programming power supply 95;

[0039] The measured motor 3 , the electromagnetic brake 52 and the power assembly 42 are electrically connected to the industrial control computer 8 .

[0040] In this embodiment, the electromagnetic brake 52 is used to limit the rotation of the transmission shaft 51, the Gaussmeter 91 is used to test the magnetic flux of the motor 3 under test, the LCR tester 92 is used to test the inductance characteristics of the motor 3 under test, the power analyzer 94 is used to test the induced voltage and current phase of the motor 3 under test, the digital oscilloscope 93 is used to test the induced voltage waveform of the motor 3 under test, the rotary encoder 43 is used to convert the rotation angle of the power shaft 41 into an electrical signal and feed it back to the industrial control computer 8, and the AC programming power supply 95 is used to make the rotor 32 under test rotate to the LD maximum value position and the Lq minimum value position.

[0041] Working principle:

[0042] Step 1 (loading the motor 3 under test): select the jig core shaft 7 corresponding to the model of the motor 3 under test, install the rotor 32 under test on the jig core shaft 7, and then install it on the shaft tail bearing seat 6, and then fix the probe 31 under test on the jig mounting seat 10, and connect the measuring leads of the Gaussmeter 91, LCR tester 92, digital oscilloscope 93 and AC programming power supply 95 to the UV phase pin of the motor 3 under test through relays respectively, and connect the measuring leads of the power analyzer 94 to the UVW phase pin of the motor 3 under test through relays.

[0043] Step 2 (motor parameter test): The following parameter tests can be performed, and the test order is not limited.

[0044] Magnetic flux test: The relay is controlled by the industrial computer 8 to connect the Gaussmeter 91 to the UV phase pin of the motor 3 under test. The power component 42 drives the rotor 32 under test to rotate at a set speed through the power transmission mechanism 5. The Gaussmeter 91 is started to measure the set time and then the measurement data is obtained. Then the power component 42 stops rotating and the Gaussmeter 91 is reset. After multiple automatic measurements, the average value is taken, the data is recorded, and the Gaussmeter 91 is disconnected from the active component.

[0045] No-power inductance test: The relay is controlled by the industrial computer 8 to connect the LCR tester 92 to the UV phase pin of the motor 3 under test. The power assembly 42 drives the rotor 32 under test to rotate 0.5 degrees through the power transmission mechanism 5 and locks it through the electromagnetic brake 52 to obtain the current inductance until it rotates 360 degrees in total. Then the LCR tester 92 is disconnected, LD and Lq are calculated and solved, the data is recorded, and the inductance characteristic curve diagram and Ld and Lq reports are generated. The printer 20 can also be controlled to print out.

[0046] Power-on inductance LD, Lq test: First, the power-on inductance LD test is performed, and the relay is controlled by the industrial control computer 8 to connect the LCR tester 92, the AC programming power supply 95 and the UV phase pin of the motor 3 under test. The power component 42 drives the rotor 32 under test to the LD maximum value position through the power transmission mechanism 5, and locks the rotor 32 under test through the electromagnetic brake 52. The current and frequency setting values ​​of a gear are read from the configuration file, and the output of the AC programming power supply 95 is controlled according to the setting values. Then, the voltage, current and phase data are read and recorded; after completing all configuration tests, the electromagnetic brake 52 is released;

[0047] Then, the power-on inductance Lq test is performed, the power component 42 drives the rotor 32 to rotate to the Lq maximum value position through the power transmission mechanism 5, and locks the rotor 32 to be tested through the electromagnetic brake 52, reads a current and frequency setting value from the configuration file, controls the output of the AC programming power supply 95 according to the setting value, and then reads the voltage, current, and phase data and records them. After completing all configuration tests, release the electromagnetic brake 52, disconnect the AC programming power supply 95, and turn off the fan.

[0048] Induced voltage waveform test: The relay is controlled by the industrial computer 8 to connect the digital oscilloscope 93 to the UV phase pin of the motor 3 under test. The servo motor 421 of the power assembly 42 drives the rotor 32 under test to rotate at a constant speed at a set speed. Then the digital oscilloscope 93 selects a suitable gear to obtain the voltage curve, then stops rotating, disconnects the digital oscilloscope 93, records data, and generates an induced voltage waveform diagram. The printer 20 can also be controlled to print out.

[0049] Induced voltage and current phase test: The relay is controlled by the industrial computer 8 to connect the power analyzer 94 to the UVW phase pins of the motor 3 under test. The servo motor 421 of the power assembly 42 drives the rotor 32 under test to rotate at a constant speed at a set speed, and then reads the voltage, current, and phase difference from the power analyzer 94. Then the rotation is stopped, the power analyzer 94 is disconnected, and the data is recorded.

[0050] Step 3 (unloading of the test motor): unloading is performed after all the above parameter items are tested, and the test of the next motor 3 to be tested is cycled in sequence.

[0051] In summary, the inductance, induced voltage, magnetic flux and other parameters of the motor can be automatically tested and recorded, and a report can be generated, thereby reducing production costs, improving detection speed and accuracy, and ensuring that the detection results are accurate and reliable.

[0052] In this embodiment, the transmission shaft 51 and the power shaft 41 as well as the power shaft 41 and the encoder are connected via couplings 40 , respectively.

[0053] In this embodiment, if Figure 3As shown, since the fixture core shaft 7 needs to be frequently assembled and disassembled with the transmission shaft 51 , in order to improve the convenience of assembly and disassembly and the reliability of connection, the transmission shaft 51 and the fixture core shaft 7 are connected by a tapered sleeve 30 .

[0054] Furthermore, as shown in the figure, in order to improve the fixing effect of the fixture mounting seat 10 on the measured element 31, a semicircular holding block 50 is provided between the fixture mounting seat 10 and the measured element 31.

[0055] Further, such as Figure 3 As shown, in order to improve the precise control of the rotation angle of the power shaft 41, the power mechanism 4 also includes a rotary encoder 43 electrically connected to the industrial control computer 8, and the end of the power shaft 41 away from the transmission shaft 51 is transmission-connected to the rotary encoder 43; the rotation angle of the power shaft 41 is converted into an electrical signal and fed back to the industrial control computer 8, and the real-time rotation angle of the power shaft 41 can be accurately fed back through double feedback comparison.

[0056] Further, such as Figure 1 , 3 As shown, in order to improve the scope of application and meet the testing of motors 3 under test of different specifications, a first adjustment mechanism 1 is arranged between the shaft tail bearing seat 6 and the fixture mounting seat 10 and the test frame 100, and the first adjustment mechanism 1 is used to adjust the distance between the shaft tail bearing seat 6 and the fixture mounting seat 10 and the transmission shaft 51 away from one end of the power shaft 41.

[0057] Further, such as Figure 2 As shown, in order to realize the movement, position adjustment and locking of the shaft tail bearing seat 6 and the fixture mounting seat 10, the first adjustment mechanism 1 includes a connecting plate 11, a first sliding component 12 and a first locking component 13;

[0058] The shaft tail bearing seat 6 and the fixture mounting seat 10 are arranged on a connecting plate 11 , and the connecting plate 11 is connected to the test frame 100 through a first sliding component 12 , and the first locking component 13 is located between the connecting plate 11 and the first sliding component 12 .

[0059] Further, such as Figure 2 As shown, in order to stably adjust the shaft tail bearing seat 6 and the fixture mounting seat 10, and to improve the convenience and accuracy of adjustment, the first adjustment mechanism 1 also includes a connecting plate position adjustment component 14;

[0060] The connecting plate position adjustment assembly 14 includes a screw 141, a screw connecting seat 142, a nut mounting seat 143 and a handle 144. The two ends of the screw 141 are only rotatably connected to the screw connecting seat 142 through bearings, the nut mounting seat 143 is connected to the connecting plate 11, the screw 141 is threadedly connected to the nut mounting seat 143, and the end of the screw 141 away from the connecting plate 11 is connected to the handle 144.

[0061] Further, such as Figure 2 As shown, in order to improve the scope of application and meet the testing of motors 3 of different series and specifications, a second adjustment mechanism 2 is provided between the shaft tail bearing seat 6 and the connecting plate 11, and the second adjustment mechanism 2 is used to adjust the distance between the shaft tail bearing seat 6 and the fixture mounting seat 10.

[0062] Further, such as Figure 2 As shown, in order to achieve position adjustment and locking of the shaft tail bearing seat 6 relative to the fixture mounting seat 10, the second adjustment mechanism 2 includes a second sliding component 21 and a second locking component 22 arranged between the shaft tail bearing seat 6 and the second sliding component 21.

[0063] Further, such as Figure 3 As shown, in order to realize the connection between the power shaft 41 and the test frame 100 and the transmission shaft 51 and the test frame 100, the power mechanism 4 also includes a power bearing seat 44 connected to the test frame 100, and the power shaft 41 is rotatably connected to the power bearing seat 44; the power transmission mechanism 5 also includes a transmission bearing seat 53 connected to the test frame 100, and the transmission shaft 51 is rotatably connected to the transmission bearing seat 53.

[0064] Further, such as Figure 3 As shown, in order to realize the rotational drive of the power shaft 41, the power assembly 42 includes a servo motor 421 that is coaxially arranged with the power shaft 41, the servo motor 421 is arranged on a power bearing seat 44, a driven wheel 422 is arranged on the power shaft 41, a driving wheel 423 is arranged on the driving shaft of the servo motor 421, and the driving wheel 423 and the driven wheel 422 are connected through a synchronous belt 424.

[0065] Furthermore, in order to meet the requirement of a maximum rotation speed of 1000 rpm and ensure smooth and accurate rotation of the power shaft 41 , a 1.5KW high torque servo motor 421 is used.

[0066] Further, such as Figure 1 , 4 As shown, in order to improve safety, the test frame 100 is provided with a protective cover 60 on the outside of the power mechanism 4 , the power transmission mechanism 5 and the shaft tail bearing seat 6 .

[0067] Further, such as Figure 1 As shown, in order to improve the convenience and safety of operation, the protective cover 60 includes a cover body 601 and a swing door 602 that is telescopically and slidably connected to the opening of the cover body 601, and the swing door 602 is a two-stage telescopic structure.

[0068] Further, such as Figure 4As shown, in order to cool the motor 3 under test for the on-state inductance LD and Lq test, a cooling fan 70 is also provided on the test rack 100 , and the cooling air outlet of the cooling fan 70 is located above the fixture mounting seat 10 .

[0069] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of the utility model patent.

Claims

1. An automated motor parameter testing device, comprising a test rack, an instrument rack and a motor to be tested, characterized in that: The test frame is coaxially provided with a power mechanism, a power transmission mechanism, a shaft tail bearing seat and a fixture mandrel from left to right; The power mechanism includes a power shaft and a power assembly for driving the power shaft to rotate, and the power transmission mechanism includes a transmission shaft and an electromagnetic brake arranged on the transmission shaft; One end of the fixture mandrel is rotatably connected to the shaft tail bearing seat, and the other end is connected to the transmission shaft, and one end of the power shaft is connected to the transmission shaft; The motor under test comprises a stator under test and a rotor under test, a fixture mounting seat for mounting the stator under test is arranged on the outer side of the fixture core shaft, and the rotor under test is detachably connected to the fixture core shaft; The test rack is provided with an industrial computer and an instrument component and a printer electrically connected to the industrial computer, wherein the instrument component includes a gauss meter, an LCR tester, a digital oscilloscope, a power analyzer and an AC programming power supply; The measured motor, electromagnetic brake and power assembly are electrically connected to the industrial control computer.

2. The automatic motor parameter testing device according to claim 1, characterized in that: The power mechanism also includes a rotary encoder electrically connected to the industrial computer, and one end of the power shaft away from the transmission shaft is transmission-connected to the rotary encoder.

3. The automatic motor parameter testing device according to claim 1, characterized in that: A first adjustment mechanism is provided between the shaft tail bearing seat, the fixture mounting seat and the test frame, and the first adjustment mechanism is used to adjust the distance between the shaft tail bearing seat, the fixture mounting seat and one end of the transmission shaft away from the power shaft.

4. The automatic motor parameter testing device according to claim 3, characterized in that: The first adjustment mechanism includes a connecting plate, a first sliding assembly and a first locking assembly; The shaft tail bearing seat and the fixture mounting seat are arranged on a connecting plate, and the connecting plate is connected to the test frame through a first sliding component, and the first locking component is located between the connecting plate and the first sliding component.

5. The automatic motor parameter testing device according to claim 3, characterized in that: The first adjustment mechanism also includes a connection plate position adjustment component; The connecting plate position adjustment assembly includes a screw, a screw connecting seat, a nut mounting seat and a handle. The two ends of the screw are only rotatably connected to the screw connecting seat through bearings, the nut mounting seat is connected to the connecting plate, the screw is threadedly connected to the nut mounting seat, and the end of the screw away from the connecting plate is connected to the handle.

6. The automatic motor parameter testing device according to claim 4, characterized in that: A second adjustment mechanism is provided between the shaft tail bearing seat and the connecting plate, and the second adjustment mechanism is used to adjust the distance between the shaft tail bearing seat and the fixture mounting seat.

7. The automatic motor parameter testing device according to claim 6, characterized in that: The second adjustment mechanism includes a second sliding component and a second locking component arranged between the shaft tail bearing seat and the second sliding component.

8. The automatic motor parameter testing device according to claim 1, characterized in that: The power mechanism further comprises a power bearing seat connected to the test frame, and the power shaft is rotatably connected to the power bearing seat; the power transmission mechanism further comprises a transmission bearing seat connected to the test frame, and the transmission shaft is rotatably connected to the transmission bearing seat; The power assembly includes a servo motor that is coaxially arranged with the power shaft. The servo motor is arranged on a power bearing seat. A driven wheel is arranged on the power shaft. A driving wheel is arranged on the driving shaft of the servo motor. The driving wheel and the driven wheel are connected by a synchronous belt transmission.

9. The automatic motor parameter testing device according to claim 1, characterized in that: The test frame is provided with a protective cover on the outer sides of the power mechanism, the power transmission mechanism and the shaft tail bearing seat.

10. The automatic motor parameter testing device according to claim 1, characterized in that: It also includes a cooling air fan arranged on the test rack, wherein the cooling air outlet of the cooling air fan is located above the fixture mounting seat.

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