CN215894736U - Be used for permanent magnet synchronous motor shaft voltage test structure - Google Patents
Be used for permanent magnet synchronous motor shaft voltage test structure Download PDFInfo
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- CN215894736U CN215894736U CN202121809535.5U CN202121809535U CN215894736U CN 215894736 U CN215894736 U CN 215894736U CN 202121809535 U CN202121809535 U CN 202121809535U CN 215894736 U CN215894736 U CN 215894736U
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- semicircular hole
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- hole cover
- motor shaft
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Abstract
The utility model provides a structure for testing the voltage of a permanent magnet synchronous motor shaft, which is used for quickly detecting the voltage of the motor shaft, ensuring stable and reliable detection, and has simple structure and reduced manufacturing cost. It includes end cover, motor shaft, the corresponding end side of motor shaft is protruding to be arranged in the end cover, its characterized in that, it includes: a first semi-circular orifice cover; a second semi-circular orifice cover; the first semicircular hole cover and the second semicircular hole cover are spliced and sleeved at the axial position of the motor shaft, the side of the motor shaft protrudes out of the end cover, the first semicircular hole cover and the second semicircular hole cover are fixedly connected with the outer end face of the end cover through fasteners respectively, an inner ring wall formed by combining the first semicircular hole cover and the second semicircular hole cover and a corresponding outer ring wall of the motor shaft are spaced, radial inner grooves are formed in the inner ring walls of the first semicircular hole cover and the second semicircular hole cover respectively, springs and carbon brushes are plugged in the radial inner grooves, and the radial inner ends of the carbon brushes are arranged in a jacking mode on the motor shaft.
Description
Technical Field
The utility model relates to the technical field of motor shaft voltage testing, in particular to a structure for testing the voltage of a permanent magnet synchronous motor shaft.
Background
The new energy motor controller mostly adopts pulse width modulation to control the motor rotating speed, which means that common mode voltage can be generated on a motor rotating shaft through capacitance induction. Can discharge electricity on the motor bearing, so that the surface has electric corrosion spots or groove damage. The motor can be out of order under severe conditions, and the service life of the motor is greatly shortened. For high power and high torque motors, high frequency loop currents are also generated, which also cause irreversible damage to the bearings. Therefore, the voltage value of the motor shaft generated in the motor work can be accurately measured and controlled, and the method becomes an important ring in motor development; the existing motor shaft voltage test structure is complex and is not beneficial to popularization.
Disclosure of Invention
Aiming at the problems, the utility model provides a structure for testing the voltage of a permanent magnet synchronous motor shaft, which is used for quickly detecting the voltage of the motor shaft, ensuring stable and reliable detection, and has simple structure and reduced manufacturing cost.
The utility model provides a be used for permanent magnet synchronous motor shaft voltage test structure, its technical scheme is such, and it includes end cover, motor shaft, the corresponding end side of motor shaft is protruding in the end cover and is arranged, its characterized in that, it includes:
a first semi-circular orifice cover;
a second semi-circular orifice cover;
the first semicircular hole cover and the second semicircular hole cover are spliced and sleeved at the axial position where the side of the motor shaft is protruded to the end cover, the first semicircular hole cover and the second semicircular hole cover are fixedly connected with the outer end surface of the end cover through fasteners respectively,
an inner ring wall formed by combining the first semicircular hole cover and the second semicircular hole cover and a corresponding outer ring wall of the motor shaft are spaced, the inner ring walls of the first semicircular hole cover and the second semicircular hole cover are respectively provided with a radial inner groove, a spring and a carbon brush are plugged in the radial inner grooves, and the radial inner ends of the carbon brushes are arranged in a jacking mode on the motor shaft;
the first semicircular hole cover is made of a non-conductor, the first semicircular hole cover is further provided with a line passing hole corresponding to the tail end of the radial inner groove, the line passing hole enables the carbon brush to be connected with voltage detection equipment through a lead, the second semicircular hole cover is made of a conductor material, the second semicircular hole cover is connected with the end cover through a fastener of the conductor, and the end cover is externally connected with a grounding wire.
It is further characterized in that:
a boss ring groove is formed in the outer side of the end cover, and the first semicircular hole cover and the second semicircular hole cover are assembled in a positioning mode and then assembled in the boss ring groove, so that the assembly is fast and convenient;
the first semicircular hole cover and the second semicircular hole cover are provided with observation gaps corresponding to the outer end faces of the radial inner grooves, so that the grinding amount of the carbon brush can be conveniently observed, and the carbon brush can be conveniently replaced in time;
the first semicircular hole cover is made of a nylon material;
the second semicircular hole cover is made of cast aluminum.
After the technical scheme is adopted, the first semicircular hole cover and the second semicircular hole cover are assembled at the protruding position of the motor shaft relative to the end cover in a splicing mode, the two carbon brushes are respectively attached to the corresponding outer ring surface of the motor shaft through springs, a lead of the carbon brush on the first semicircular hole cover is externally connected with voltage detection equipment through the wire passing hole and used for detecting a voltage value, and the second semicircular hole cover is in conductor connection with the carbon brushes and the end cover through the wire passing hole, so that current generated on the motor shaft is led out through the grounding wire; the method not only realizes accurate measurement of the voltage of the motor shaft, but also meets the requirement of effectively avoiding shaft current; the motor shaft voltage detection device is used for rapidly detecting the voltage of a motor shaft, stable and reliable detection is guaranteed, the structure is simple, and the manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a perspective view of a second half round hole cover according to the present invention showing a schematic view of the necrosis;
the names corresponding to the sequence numbers in the figure are as follows:
the motor comprises an end cover 10, a boss ring groove 101, a motor shaft 20, a first semicircular hole cover 30, a second semicircular hole cover 40, a spacing 50, a radial inner groove 60, a rectangular groove 61, a circular groove 62, a spring 70, a carbon brush 80, a wire passing hole 90, a lead 100, a bolt 110 and an observation notch 120.
Detailed Description
A voltage test structure for a permanent magnet synchronous motor shaft is shown in figures 1 and 2 and comprises an end cover 10, a motor shaft 20, a first semicircular hole cover 30 and a second semicircular hole cover 40; the corresponding end side of the motor shaft 20 is arranged to be protruded from the end cover 10, the first semicircular hole cover 30 and the second semicircular hole cover 40 are assembled and sleeved at the axial position where the side of the motor shaft is protruded from the end cover, the first semicircular hole cover and the second semicircular hole cover are respectively fixedly connected with the outer end surface of the end cover 10 through fasteners,
an inner annular wall formed by combining the first semicircular hole cover 30 and the second semicircular hole cover 40 and a corresponding outer annular wall of the motor shaft are spaced by 50 intervals, the inner annular walls of the first semicircular hole cover 30 and the second semicircular hole cover 40 are respectively provided with a radial inner groove 60, a spring 70 and a carbon brush 80 are plugged in the radial inner grooves 60, and the radial inner end of the carbon brush 80 is arranged in a jacking mode on the motor shaft 20; the spring 70 ensures that the carbon brush 80 can still be effectively and stably attached to the motor shaft after being worn, so that the detection accuracy is ensured;
the first semicircular hole cover 30 is made of a non-conductor, the tail end, corresponding to the radial inner groove, of the first semicircular hole cover 30 is further provided with a line passing hole 90, the line passing hole 90 enables the carbon brush 80 to be externally connected with voltage detection equipment through a lead 100, the second semicircular hole cover 40 is made of a conductor material, the second semicircular hole cover 40 is connected with the end cover 10 through a fastener made of the conductor material, and the end cover 10 is externally connected with a grounding wire.
A boss ring groove 101 is formed in the outer side of the end cover 10, and the first semicircular hole cover 30 and the second semicircular hole cover 40 are assembled and then positioned in the boss ring groove 101, so that the assembly is fast and convenient;
the first semicircular hole cover 30 and the second semicircular hole cover 40 are provided with observation notches 120 corresponding to the outer end faces of the radial inner grooves, so that the grinding amount of the carbon brush 80 can be conveniently observed, and timely replacement is facilitated.
In the specific implementation: the first semicircular hole cover 30 is made of nylon material; the second semicircular hole cover 40 is made of cast aluminum, and the first semicircular hole cover 30 and the second semicircular hole cover 40 are fixedly connected with the corresponding outer end faces of the end cover 10 through annularly-distributed bolts 110 respectively;
the radial inner grooves 60 comprise radial outer rectangular grooves 61 and radial inner circular grooves 62, the rectangular grooves are used for installing the carbon brushes 80, and the circular grooves 62 are used for installing the springs 70; in specific implementation, the outer end face of the semicircular hole cover corresponding to the rectangular groove 61 is provided with an observation notch 120;
the conducting wire 100 is a copper conducting wire, one end of the copper conducting wire is connected to a voltage testing device, and a shaft voltage generated when the motor operates is detected by the device through the motor shaft 20, the carbon brush 80 and the conducting wire 100.
The working principle is as follows: the first semicircular hole cover and the second semicircular hole cover are assembled at the protruding positions of the motor shaft relative to the end cover in a splicing mode, the two carbon brushes are respectively attached to the corresponding outer ring surface of the motor shaft through springs, a lead of the carbon brush on the first semicircular hole cover is externally connected with voltage detection equipment through a wire passing hole and used for detecting a voltage value, and the second semicircular hole cover is in conductor connection with the carbon brushes and the end cover through a conductor, so that current generated on the motor shaft is led out through a grounding wire; the method not only realizes accurate measurement of the voltage of the motor shaft, but also meets the requirement of effectively avoiding the shaft current.
The innovation points are as follows: the whole round hole cover is in a half-structure, so that the processing of a slotted structure in the hole is realized, and meanwhile, an observation notch is formed in the outer side of the rectangular groove, so that the abrasion loss of the carbon brush can be conveniently observed; the carbon brush can be dynamically compensated for abrasion by using the spring for pressing, so that the carbon brush is ensured to be tightly attached to the rotating shaft of the motor; not only the accurate measurement of motor shaft voltage has been realized, has satisfied the effective evasion of counter shaft current simultaneously.
The beneficial effects are as follows: the influence on the service life of a motor bearing is judged by testing the voltage of a motor shaft and is used as an important basis for accounting the service life of the motor; the device has compact integral structure, flexible installation, simple disassembly and assembly, convenient maintenance and low processing and manufacturing cost, does not influence the original spatial arrangement of the motor; for the motor with a large actual measurement voltage value, the device can be used for drainage directly, so that the damage to the existing bearing of the motor is reduced.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. The utility model provides a be used for permanent magnet synchronous motor shaft voltage test structure, its includes end cover, motor shaft, the corresponding end side of motor shaft is protruding in the end cover and is arranged, its characterized in that, it includes:
a first semi-circular orifice cover;
a second semi-circular orifice cover;
the first semicircular hole cover and the second semicircular hole cover are spliced and sleeved at the axial position where the side of the motor shaft is protruded to the end cover, the first semicircular hole cover and the second semicircular hole cover are fixedly connected with the outer end surface of the end cover through fasteners respectively,
an inner ring wall formed by combining the first semicircular hole cover and the second semicircular hole cover and a corresponding outer ring wall of the motor shaft are spaced, the inner ring walls of the first semicircular hole cover and the second semicircular hole cover are respectively provided with a radial inner groove, a spring and a carbon brush are plugged in the radial inner grooves, and the radial inner ends of the carbon brushes are arranged in a jacking mode on the motor shaft;
the first semicircular hole cover is made of a non-conductor, the first semicircular hole cover is further provided with a line passing hole corresponding to the tail end of the radial inner groove, the line passing hole enables the carbon brush to be connected with voltage detection equipment through a lead, the second semicircular hole cover is made of a conductor material, the second semicircular hole cover is connected with the end cover through a fastener of the conductor, and the end cover is externally connected with a grounding wire.
2. The structure for testing the voltage of the shaft of the permanent magnet synchronous motor according to claim 1, wherein: and a boss ring groove is formed in the outer side of the end cover, and the first semicircular hole cover and the second semicircular hole cover are assembled in a positioning mode and are assembled in the boss ring groove.
3. The structure for testing the voltage of the shaft of the permanent magnet synchronous motor according to claim 1, wherein: and the first semicircular hole cover and the second semicircular hole cover are provided with observation gaps corresponding to the outer end faces of the radial inner grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121809535.5U CN215894736U (en) | 2021-08-04 | 2021-08-04 | Be used for permanent magnet synchronous motor shaft voltage test structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121809535.5U CN215894736U (en) | 2021-08-04 | 2021-08-04 | Be used for permanent magnet synchronous motor shaft voltage test structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215894736U true CN215894736U (en) | 2022-02-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121809535.5U Active CN215894736U (en) | 2021-08-04 | 2021-08-04 | Be used for permanent magnet synchronous motor shaft voltage test structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215894736U (en) |
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2021
- 2021-08-04 CN CN202121809535.5U patent/CN215894736U/en active Active
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