CN212111700U - Soft magnetic composite material motor stator testing device - Google Patents
Soft magnetic composite material motor stator testing device Download PDFInfo
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- CN212111700U CN212111700U CN202020628701.0U CN202020628701U CN212111700U CN 212111700 U CN212111700 U CN 212111700U CN 202020628701 U CN202020628701 U CN 202020628701U CN 212111700 U CN212111700 U CN 212111700U
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Abstract
The utility model discloses a soft magnetic composite material motor stator testing device, which belongs to the field of motor testing, and comprises a voltage source, a power analyzer and a motor stator clamp, wherein the motor stator clamp comprises a U-shaped yoke, a primary coil is wound on a first side arm of the U-shaped yoke, and a secondary coil is wound on a second side arm; the voltage source is connected with the primary coil through the oscilloscope, a current transformer is arranged on a circuit between the primary coil and the oscilloscope, and the output end of the current transformer is connected with a current wiring terminal of the power analyzer; the secondary coil is connected with a load resistor, a voltmeter is arranged on the load resistor, and two ends of the secondary coil are also connected to a voltage wiring terminal of the power analyzer. The utility model discloses can test the uniformity and the iron loss of forming back motor stator through powder metallurgy to the device can also test under the processing condition of difference, adopts the size of different processing methods to motor stator electromagnetic property influence.
Description
Technical Field
The utility model relates to a motor test field especially indicates a soft-magnetic composite motor stator testing arrangement.
Background
SMC (Soft Magnetic Composite) is a Composite material having a Soft Magnetic function, which is a Composite material of a Soft Magnetic ferrite and a high polymer matrix. The SMC motor adopts a modular structure, namely, the stator of the SMC motor is pressed into a certain shape in a powder metallurgy mode. Under the normal condition, all indexes of the electromagnetic performance of the pressed SMC motor stator are pressed into a certain annular sample according to the standard to test the electromagnetic performance of the SMC motor stator, but the difference of the electromagnetic performance tested by the annular sample and the electromagnetic performance of the motor stator actually produced exists; the consistency problem of the motor stator produced by using the soft magnetic composite material directly influences the stability of various performances of the SMC motor, at present, the consistency problem of the motor stator produced by adopting a powder metallurgy process is difficult to judge in the production process of the SMC motor stator, and an available testing device is not found at home and abroad.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a soft-magnetic combined material motor stator testing arrangement that can test motor stator's uniformity and iron loss.
In order to solve the technical problem, the utility model provides a technical scheme as follows:
the utility model provides a soft magnetic composite material motor stator testing arrangement, includes voltage source, power analyzer and motor stator anchor clamps, wherein:
the motor stator clamp comprises a U-shaped yoke, the U-shaped yoke comprises a first side arm and a second side arm which are opposite, a primary coil is wound on the first side arm, a secondary coil is wound on the second side arm, and an opening of the U-shaped yoke is used for placing a motor stator to be tested;
the voltage source is connected with the primary coil through an oscilloscope, a first switch is arranged between the voltage source and the oscilloscope, a current transformer is arranged on a circuit between the primary coil and the oscilloscope, and the output end of the current transformer is connected to a current terminal of the power analyzer;
the secondary coil is connected with a load resistor, a voltmeter is arranged on the load resistor, two ends of the secondary coil are further connected to a voltage wiring end of the power analyzer, and a second switch is arranged between the secondary coil and the power analyzer.
Furthermore, the voltage source is an alternating current voltage source with adjustable frequency and voltage, the frequency adjusting range is 0-1200Hz, and the voltage adjusting range is 0-36 v.
Furthermore, the first side arm is provided with a through hole at the opening part of the U-shaped yoke, and a sliding block used for clamping the motor stator is arranged in the through hole.
Furthermore, the motor stator clamp further comprises a clamping support, the clamping support is in a square frame shape, an opening is formed in the long edge of one side of the clamping support, and the opening of the U-shaped yoke is inserted into the opening, so that the outer side face of the second side arm of the U-shaped yoke abuts against the short edge of one side of the clamping support; and a short edge at the other side of the clamping bracket is provided with a longitudinal clamping block, and the end surface of the inner side of the longitudinal clamping block abuts against the sliding block.
Furthermore, the clamping support is provided with a round hole on a short edge provided with a longitudinal clamping block, the longitudinal clamping block comprises a first threaded rod penetrating through the round hole, a longitudinal clamping spring is sleeved on a part of the first threaded rod in the clamping support, a first end plate is arranged on the end part of the inner side of the first threaded rod, the first end plate is abutted against the sliding block, and a first nut is arranged on the part of the first threaded rod outside the clamping support.
Furthermore, a transverse clamping block is arranged on the long edge of the other side of the clamping support, and the end face of the inner side of the transverse clamping block is used for abutting against the motor stator.
Furthermore, press from both sides the dress support and be equipped with vertical slotted hole on the long limit that is equipped with horizontal clamp splice, horizontal clamp splice is including wearing to establish second threaded rod in the slotted hole, the second threaded rod is in it is equipped with horizontal clamping spring to press from both sides the cover on the part in the dress support, be equipped with the second end plate on the medial extremity of second threaded rod, the second end plate is used for leaning on the side of motor stator, the second threaded rod is in it is equipped with the second nut to press from both sides the outer part of dress support.
Furthermore, the second side arm is provided with a first step part used for limiting the bottom of the motor stator on the inner side surface of the opening part of the U-shaped yoke, and the end part of the inner side of the sliding block is provided with an L-shaped end plate used for limiting the upper part of the motor stator.
Furthermore, the second side arm is provided with a second step part for accommodating the short side of the clamping bracket on the outer side surface of the opening part of the U-shaped yoke, and the first end plate and the sliding block and the clamping bracket and the second step part are combined by adopting insulating glue.
Furthermore, the U-shaped yoke, the sliding block and the L-shaped end plate are made of silicon steel, and the clamping support, the longitudinal clamping block and the transverse clamping block are made of aluminum alloy.
The utility model discloses following beneficial effect has:
the utility model discloses can be to the motor stator of soft-magnetic composite preparation, the test is passed through powder metallurgy shaping back motor stator's uniformity and iron loss to the device can also test under the processing condition of difference, adopts the size of different processing methods to motor stator electromagnetic property influence.
Drawings
Fig. 1 is a schematic diagram of a testing device for a soft magnetic composite material motor stator of the present invention;
FIG. 2 is a schematic structural diagram of a stator clamp of the motor shown in FIG. 1;
FIG. 3 is a schematic structural view of the U-shaped yoke in FIG. 2, wherein (a) is a sectional structural view and (b) is a perspective structural view;
FIG. 4 is a schematic structural view of the slider and the L-shaped end plate in FIG. 2, wherein (a) is a front structural view and (b) is a perspective structural view;
fig. 5 is a schematic structural view of the holder of fig. 2, wherein (a) is a sectional structural view and (b) is a perspective structural view.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The utility model provides a soft magnetic composite material motor stator testing arrangement, as shown in fig. 1-5, including voltage source 1, power analyzer 2 and motor stator anchor clamps 3, wherein:
the motor stator clamp 3 comprises a U-shaped yoke 31, the U-shaped yoke 31 comprises a first side arm 311 and a second side arm 312 which are opposite, a primary coil 4 is wound on the first side arm 311, a secondary coil 5 is wound on the second side arm 312, and an opening 313 of the U-shaped yoke 31 is used for placing a motor stator 6 to be tested;
the voltage source 1 is connected with the primary coil 4 through the oscilloscope 7, the voltage source 1 is an alternating current voltage source, the preferred frequency and voltage are adjustable, the frequency adjusting range can be 0-1200Hz, the voltage adjusting range can be 0-36v, and the oscilloscope 7 is used for adjusting the voltage of the voltage source 1 to the required frequency and amplitude and supplying the frequency and amplitude to the primary coil 4; a first switch S1 is arranged between the voltage source 1 and the oscilloscope 7, a current transformer 8 is arranged on a circuit between the primary coil 4 and the oscilloscope 7, and the output end of the current transformer 8 is connected to the current terminal of the power analyzer 2;
the secondary coil 5 is connected with a load resistor R (preferably, a resistor with a large resistance value, for example, 1000 Ω), a voltmeter 9 is arranged on the load resistor R, two ends of the secondary coil 5 are also connected to voltage terminals of the power analyzer 2, and a second switch S2 is arranged between the secondary coil 5 and the power analyzer 2.
The specific model of the voltage source 1 can be PA9510 produced by electronic instruments in the Yanghe of Dongguan, IT7600 produced by Edx or DFWF001 produced by Qingdao Difloating; the specific model of the power analyzer 2 can be an IT9100 series produced by Edx, a high-precision power analyzer WT5000 produced by the electronic instrument of the Yanghe of Dongguan city or a PA1000 high-precision power analyzer produced by Tektronix; the specific model of the oscilloscope 7 can be Tektronix TDS3054B digital fluorescence oscilloscope, Ulidrex UPO2104CS four-channel digital storage fluorescence oscilloscope or STO1104C digital storage oscilloscope produced by Micsig; the specific model of the current transformer 8 can be a C7-009 current transformer (pin type) produced by Shenzhen Jingquan and electronics Limited, a CT7203 current transformer (pin type) produced by Shenzhen Heng-Tong electronics, or an XQCT103N current transformer (pin type) produced by Shenzhen Xin aerospace.
The test procedure was as follows:
the method comprises the following steps of testing the consistency of the motor stator, namely placing the motor stator in a testing device (namely an opening part of a U-shaped yoke of a motor stator clamp), closing a switch S1, turning off a switch S2, adjusting the frequency and voltage value U1 of a voltage source, adjusting the voltage amplitude of each test to be consistent through an oscilloscope, reading out the voltage U3 through a voltmeter, and judging the consistency of the motor stator by comparing the numerical value of the voltmeter U3 of each motor stator;
the iron loss of the motor stator is tested by placing the motor stator in a testing device (namely an opening part of a U-shaped yoke of a motor stator clamp), closing switches S1 and S2, adjusting the frequency and the voltage value U1 of a voltage source, converting the voltage value U1 into a current signal by a current transformer at the side of a primary coil, inputting the current signal into a current terminal of a power analyzer, connecting a voltage U2 output by a secondary coil with the voltage terminal of the power analyzer, and obtaining the iron loss of the motor stator through calculation in the power analyzer.
To sum up, the utility model discloses can be to the motor stator of soft-magnetic composite preparation, the test passes through the uniformity and the iron loss of powder metallurgy shaping back motor stator to the device can also test under the processing condition of difference, adopts the size of different processing methods to motor stator electromagnetic property influence.
Considering that if there is an air gap between the motor stator and the clamp, the accuracy of the value tested by the motor stator will be seriously affected, it is preferable that, as shown in fig. 2-3, the first side arm 311 is provided with a through hole 3111 at the U-shaped yoke opening 313, a slider 32 for clamping the motor stator 6 is arranged in the through hole 3111, when in use, the bottom surface of the motor stator 6 is located on the inner side surface of the second side arm 312, and the top surface of the motor stator 6 is clamped by moving the slider 32, so that the air gap between the motor stator and the clamp is reduced as much as possible, and the testing accuracy is greatly improved. The slider 32 and the through hole 3111 may be transition fit to minimize the air gap and allow for sliding convenience.
In order to improve the convenience of longitudinally clamping the motor stator, the motor stator clamp 3 may further include a clamping bracket 33, the clamping bracket 33 is in a square frame shape, the clamping bracket 33 is provided with an opening 331 (shown in fig. 5) at one long side (the left long side in the embodiment of the figure), and the opening 313 of the U-shaped yoke 31 is inserted into the opening 331, so that the outer side surface of the second side arm 312 of the U-shaped yoke 31 abuts against one short side (the lower short side in the embodiment of the figure) of the clamping bracket 33; the other short side (the upper short side in the embodiment in the figure) of the clamping bracket 33 is provided with a longitudinal clamping block 34, and the inner end surface of the longitudinal clamping block 34 is abutted against the slide block 32. Therefore, the sliding block can be better driven and positioned by clamping the bracket and the longitudinal clamping block, and the convenience and the stability of longitudinal clamping of the motor stator are improved.
The longitudinal clamp blocks 34 may take various configurations as will be readily apparent to those skilled in the art, such as threaded push rods threaded onto the clamp brackets, however the following configurations are preferred:
the clamp bracket 33 is provided with a round hole 332 (shown in fig. 5) on a short side (upper short side in the embodiment in the figure) provided with the longitudinal clamp block 34;
the longitudinal clamping block 34 includes a first threaded rod 341 inserted into the circular hole 332, a longitudinal clamping spring 342 is sleeved on a portion of the first threaded rod 341 inside the clamping bracket 33, a first end plate 343 is disposed on an inner end portion of the first threaded rod 341 to prevent the spring from falling off, the first end plate 343 abuts against the slider 32, and a first nut 344 is disposed on a portion of the first threaded rod 341 outside the clamping bracket 33 to perform a positioning function.
In order to improve the convenience of transversely clamping the motor stator, the other long side (the right long side in the embodiment in the figure) of the clamping bracket 33 is provided with a transverse clamping block 35, and the inner side end face of the transverse clamping block 35 is used for abutting against the motor stator. Therefore, the motor stator can be better positioned by clamping the bracket and the transverse clamping block, and the convenience and the stability of transversely clamping the motor stator are improved.
The transverse clamp blocks 35 may take various forms as will be readily apparent to those skilled in the art, such as threaded push rods threaded onto the clamp brackets, however the following forms are preferred:
the clamping bracket 33 is provided with a vertical oblong hole 333 (shown in fig. 5) on the long side (the right long side in the embodiment in the figure) provided with the transverse clamping block 35;
the transverse clamping block 35 comprises a second threaded rod 351 penetrating through the oblong hole 333, a transverse clamping spring 352 is sleeved on the part, in the clamping support 33, of the second threaded rod 351, a second end plate 353 is arranged at the end part of the inner side of the second threaded rod 351 to prevent the spring from falling off, the second end plate 353 is used for abutting against the side face of the motor stator 6, and a second nut 354 is arranged on the part, outside the clamping support 33, of the second threaded rod 351 to play a positioning role.
In the case of providing the transverse clamping block 35, in order to avoid the transverse displacement of the motor stator 6, it is preferable that the second side arm 312 has a first stepped portion 3121 (shown in fig. 3) on an inner side surface of the U-shaped yoke opening portion 313 for limiting a bottom portion of the motor stator 6, an inner side end portion of the slider 32 has an L-shaped end plate 36 (shown in fig. 4) for limiting an upper portion of the motor stator 6, and the slider 32 and the L-shaped end plate 36 may be an integral structure. Thus, under the combined action of the first step part, the L-shaped end plate and the transverse clamping block, the motor stator can be fixed at a proper position in the transverse direction.
Further, in order to improve the integral firmness of the motor stator clamp 3, the second side arm 312 is provided with a second stepped portion 3122 (as shown in fig. 3) for accommodating a short side (a lower short side in the embodiment of the drawing) of the clamping bracket 33 on the outer side surface of the U-shaped yoke opening 313, and the first end plate 343 and the slider 32, and the clamping bracket 33 and the second stepped portion 3122 are bonded by using insulating glue.
It can be understood that, the utility model discloses well U-shaped yoke 31, slider 32 and the preferred magnetic material such as silicon steel of material of L-shaped end plate 36, the preferred non-magnetic material such as aluminum alloy of the material of pressing from both sides dress support 33, vertical clamp splice 34 and horizontal clamp splice 35 to further improve the test accuracy. By the design, FEM simulation shows that the magnetic density of the stator of the motor is high, so that the model is ideal.
In the embodiment shown in fig. 2, the clamping process of the motor stator 6 may specifically be as follows:
the longitudinal clamping block 34 and the transverse clamping block 35 are pulled to place the motor stator 6 in the opening 313 of the U-shaped yoke 31, under the action of the longitudinal clamping spring 342, the bottom of the motor stator 6 and the U-shaped yoke 31, as well as the upper part of the motor stator 6 and the sliding block 32 can be tightly combined, under the action of the transverse clamping spring 352, the left lower part of the motor stator 6 and the U-shaped yoke 31, as well as the left upper part of the motor stator 6 and the L-shaped end plate 36 are tightly combined, and no air gap is formed at the combined part. The clamp can test the motor stators 6 with different heights and widths because the longitudinal clamping blocks 34 and the transverse clamping blocks 35 can be stretched.
The effects of the present invention will be described below with reference to the test.
Consistency test results:
for different voltages U1, the voltage U3 output by the secondary coil was calculated and respectively tested based on 3D FEM using the above-mentioned testing apparatus, and the performance was as follows (the same motor stator was tested, comparing the error between the simulation result and the test result):
TABLE 1
Testing different SMC motor stators, comparing the consistency of SMC customization, randomly extracting 5 motor stators from 100 motor stators to carry out the consistency test, and the performance is as following table 2:
TABLE 2
Iron loss test results:
a motor stator sample is extracted for testing and compared with the simulation result, and the performance is as follows in table 3:
TABLE 3
And (4) conclusion:
1. by comparing the voltage output by simulation with the voltage actually tested, the error of U3 is lower than 5% at the frequency lower than 500Hz, and the error of U3 and the error of simulated U3' increase to be higher than 20% when the frequency reaches 1000 Hz. The parameters of the iron loss model are determined by the measurement of the ring specimen under the alternating magnetic field, however, not only the alternating magnetic field but also the eddy current magnetic field are present in the test system. In actual tests, the error is larger due to the damage of the insulating layer around the particles, especially for high frequency eddy current loss, which results in the output voltage U3 or iron loss at 1000 Hz.
2. Through carrying out the conformance testing to the 5 motor stator that extract, can discover, adopt this testing arrangement can be fine to solve the problem of motor stator conformance testing. And the test result of the test device is reliable when the frequency is lower than 500 Hz.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a soft magnetic composite material motor stator testing arrangement which characterized in that, includes voltage source, power analysis appearance and motor stator anchor clamps, wherein:
the motor stator clamp comprises a U-shaped yoke, the U-shaped yoke comprises a first side arm and a second side arm which are opposite, a primary coil is wound on the first side arm, a secondary coil is wound on the second side arm, and an opening of the U-shaped yoke is used for placing a motor stator to be tested;
the voltage source is connected with the primary coil through an oscilloscope, a first switch is arranged between the voltage source and the oscilloscope, a current transformer is arranged on a circuit between the primary coil and the oscilloscope, and the output end of the current transformer is connected to a current terminal of the power analyzer;
the secondary coil is connected with a load resistor, a voltmeter is arranged on the load resistor, two ends of the secondary coil are further connected to a voltage wiring end of the power analyzer, and a second switch is arranged between the secondary coil and the power analyzer.
2. The soft magnetic composite material motor stator testing device according to claim 1, wherein the voltage source is an alternating current voltage source with adjustable frequency and voltage, the frequency adjusting range is 0-1200Hz, and the voltage adjusting range is 0-36 v.
3. The soft magnetic composite material motor stator testing device according to claim 1, wherein the first side arm is provided with a through hole in an opening portion of the U-shaped yoke, and a slider for holding the motor stator is provided in the through hole.
4. The soft magnetic composite material motor stator testing device according to claim 3, wherein the motor stator fixture further comprises a clamping bracket, the clamping bracket is square, the clamping bracket is provided with an opening at one long side, and the opening of the U-shaped yoke is inserted into the opening, so that the outer side surface of the second side arm of the U-shaped yoke abuts against one short side of the clamping bracket; and a short edge at the other side of the clamping bracket is provided with a longitudinal clamping block, and the end surface of the inner side of the longitudinal clamping block abuts against the sliding block.
5. The soft magnetic composite material motor stator testing device according to claim 4, wherein the clamping bracket is provided with a round hole on a short side provided with a longitudinal clamping block, the longitudinal clamping block comprises a first threaded rod penetrating through the round hole, a longitudinal clamping spring is sleeved on a part of the first threaded rod in the clamping bracket, a first end plate is arranged on the inner end part of the first threaded rod, the first end plate abuts against the sliding block, and a first nut is arranged on a part of the first threaded rod outside the clamping bracket.
6. The soft magnetic composite material motor stator testing device according to claim 5, wherein the other long side of the clamping bracket is provided with a transverse clamping block, and the inner side end face of the transverse clamping block is used for abutting against the motor stator.
7. The soft magnetic composite material motor stator testing device according to claim 6, wherein the clamping bracket is provided with a vertical slotted hole on a long edge provided with a transverse clamping block, the transverse clamping block comprises a second threaded rod penetrating through the slotted hole, a transverse clamping spring is sleeved on the part of the second threaded rod in the clamping bracket, a second end plate is arranged at the end part of the inner side of the second threaded rod and used for abutting against the side surface of the motor stator, and a second nut is arranged on the part of the second threaded rod outside the clamping bracket.
8. The soft magnetic composite material motor stator testing device according to claim 7, wherein the second side arm is provided with a first step part for limiting the bottom of the motor stator on the inner side surface of the opening part of the U-shaped yoke, and the inner side end part of the sliding block is provided with an L-shaped end plate for limiting the upper part of the motor stator.
9. The soft magnetic composite material motor stator testing device according to claim 8, wherein the second side arm is provided with a second step part for accommodating a short side of the clamping bracket on an outer side surface of the U-shaped yoke opening part, and the first end plate and the slider, and the clamping bracket and the second step part are bonded by using insulating glue.
10. The soft magnetic composite material motor stator testing device of claim 9, wherein the U-shaped yoke, the slider and the L-shaped end plate are made of silicon steel, and the clamping bracket, the longitudinal clamping block and the transverse clamping block are made of aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020628701.0U CN212111700U (en) | 2020-04-23 | 2020-04-23 | Soft magnetic composite material motor stator testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020628701.0U CN212111700U (en) | 2020-04-23 | 2020-04-23 | Soft magnetic composite material motor stator testing device |
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| Publication Number | Publication Date |
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| CN212111700U true CN212111700U (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020628701.0U Active CN212111700U (en) | 2020-04-23 | 2020-04-23 | Soft magnetic composite material motor stator testing device |
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| CN (1) | CN212111700U (en) |
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