CN215498247U - Current protection device for motor detection - Google Patents
Current protection device for motor detection Download PDFInfo
- Publication number
- CN215498247U CN215498247U CN202121049879.0U CN202121049879U CN215498247U CN 215498247 U CN215498247 U CN 215498247U CN 202121049879 U CN202121049879 U CN 202121049879U CN 215498247 U CN215498247 U CN 215498247U
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- Prior art keywords
- current
- protection device
- shell
- phase
- contactor
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- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 239000000428 dust Substances 0.000 claims abstract description 13
- 230000017525 heat dissipation Effects 0.000 claims abstract description 8
- 230000006378 damage Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of motor current protection, in particular to a current protection device for motor detection, which comprises a protection device body, wherein the protection device body comprises a shell, the bottom surface of the shell is fixedly connected with a base, the middle part of the front surface of the shell is fixedly connected with a lead, the lower end of the front surface of the shell is provided with a heat dissipation hole, the back surface of the heat dissipation hole is fixedly provided with a dust screen, a three-phase current detection sensor is fixedly arranged in the shell, and the rear side of the three-phase current detection sensor is fixedly connected with a three-phase alternating current contactor. According to the utility model, the NI acquisition card is used for acquiring the signal of the current sensor as a test current data record, once the over-limit current is acquired in the test process, the three-phase alternating current contactor is immediately controlled to be disconnected through the PLC, the power supply and the controller output are stopped, a closed-loop control mode is adopted in the whole process, the input and output current can be cut off at the first time, and the secondary damage to equipment is avoided.
Description
Technical Field
The utility model relates to the technical field of motor current protection, in particular to a current protection device for motor detection.
Background
The existing motor protection strategy is to add a current sensor on a three-phase line of a motor, when the current is detected to exceed a set value, a power supply is turned off and a controller is stopped to continuously output the current, the method can effectively cut off the large current from the source, but the motor is used as an inductive load, after the motor is charged by the large current, the input and the output of the controller are stopped instantly, the controller is possibly damaged due to the reverse discharge of the motor, the motor fault is detected, and the problems of the controller damage and the equipment fault due to the discharge characteristic of the motor exist.
Therefore, in order to solve the above problems, a current protection device for motor detection is proposed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a current protection device for motor detection, which aims to solve the problems that after a motor is charged by a large current, the input and the output of a controller are stopped instantly, the controller is possibly damaged and the motor is possibly detected to be out of order due to the reverse discharge of the motor, and the controller is damaged and equipment is possibly out of order due to the discharge characteristic of the motor.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a current protection device for motor detection, includes the protection device body, the protection device body includes the shell, the bottom surface fixedly connected with base of shell, the positive middle part fixedly connected with wire of shell, the louvre has been seted up to the positive lower extreme of shell, the back of louvre, fixed mounting has the dust screen, the inside fixed mounting of shell has three-phase current to detect the sensor, three-phase current detects the rear side fixedly connected with three-phase ac contactor of sensor.
Preferably, the bottom surface of the shell is provided with a containing cavity, and the upper end of the front surface of the shell is provided with a wiring terminal.
Preferably, the cross-sectional area of the bottom end of the shell is smaller than the top area of the base, and the top surface of the base is provided with a bolt.
Preferably, the dust screen is installed in the containing cavity, and the dust screen is located at the tail end of the heat dissipation hole.
Preferably, the three-phase current detection sensor and the three-phase ac contactor are installed inside the storage cavity.
Preferably, the protection device body is controlled by a PLC, the three-phase current detection sensor is connected with an NI acquisition card, and the three-phase AC contactor is connected with a power supply and a controller.
Compared with the prior art, the utility model has the beneficial effects that: the utility model utilizes the NI acquisition card to acquire the signal of the current sensor as the record of test current data, once the over-limit current is acquired in the test process, the three-phase alternating current contactor is immediately controlled by the PLC to be disconnected, and the output of the power supply and the controller is stopped, the whole process adopts a closed-loop control mode, the input and output current can be cut off at the first time, and the secondary damage to the equipment is avoided,
be provided with the protection device body, three-phase ac contactor designs for normally open state, only just can the actuation carry out load test when the test, the device utilizes NI collection card to gather three-phase current and detects sensor signal as experimental current data record, gather the electric current that transfinites in the test procedure, can pass through PLC control three-phase ac contactor disconnection, and termination power and controller output, whole journey adopts closed-loop control mode, can cut off input and output current at the very first time, control is complete, the response is timely, the current cut-off is thorough during the trouble, can avoid the secondary injury to equipment.
Drawings
FIG. 1 is a schematic front view of a protection device body according to the present invention;
FIG. 2 is a schematic side sectional view of the structure of the housing of the present invention;
FIG. 3 is a schematic side view of a heat dissipation hole of the present invention;
fig. 4 is a schematic view of the working principle of the protection device body of the present invention.
In the figure: 1. a protection device body; 11. a housing; 12. a base; 13. a wire; 14. heat dissipation holes; 15. a dust screen; 16. a three-phase current detection sensor; 17. a three-phase AC contactor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, an embodiment of the present invention is shown:
the utility model provides a current protection device for motor detection, includes protection device body 1, protection device body 1 includes shell 11, shell 11's bottom surface fixedly connected with base 12, shell 11 positive middle part fixedly connected with wire 13, shell 11 positive lower extreme has seted up louvre 14, the louvre 14 back, fixed mounting has dust screen 15, shell 11's inside fixed mounting has three-phase current to detect sensor 16, three-phase current detects sensor 16's rear side fixedly connected with three-phase ac contactor 17.
Further, the bottom surface of the shell 11 is provided with a containing cavity, and the upper end of the front surface of the shell 11 is provided with a wiring terminal, so that a containing space is provided for installing the three-phase current detection sensor 16 and the three-phase alternating current contactor 17.
Furthermore, the cross-sectional area of shell 11 bottom is less than the top area of base 12, and the bolt is installed to the top surface of base 12, makes shell 11 fixable mounting on base 12, guarantees the joint strength between shell 11 and the base 12, is convenient for fix protection device body 1.
Further, the dust screen 15 is installed in the inside of accomodating the chamber, and the dust screen 15 is located the tail end of louvre 14, filters the air that gets into and accomodate the intracavity portion, avoids the dust to pile up accomodating the intracavity portion, influences three-phase current detection sensor 16 and three-phase ac contactor 17's heat dissipation.
Further, three-phase current detection sensor 16 and three-phase ac contactor 17 are installed in the inside of accomodating the chamber, provide the position for three-phase current detection sensor 16 and three-phase ac contactor 17's installation, and shell 11 can protect three-phase current detection sensor 16 and three-phase ac contactor 17 simultaneously, prolongs the life of protection device body 1.
Further, the protection device body 1 is controlled by a PLC, an NI acquisition card is connected to the three-phase current detection sensor 16, a power supply and a controller are connected to the three-phase alternating current contactor 17, signals sent by the three-phase current detection sensor 16 can be acquired conveniently, then the PLC controls the three-phase alternating current contactor 17 to be disconnected, current is cut off timely, and secondary damage to equipment is avoided.
The working principle is as follows: three-phase ac contactor 17 designs for normally open state, only just can the actuation carry out load test when the test, the during operation utilizes NI collection card to gather three-phase current detection sensor 16 signal as test current data record, gather the electric current that transfinites in the test procedure, can pass through PLC control three-phase ac contactor 17 disconnection immediately, and termination power and controller output, whole journey adopts closed-loop control mode, can cut off input and output current at the very first time, control is complete, the response is timely, the current cuts off thoroughly during the trouble, avoid the secondary injury to equipment, guarantee the even running of equipment.
Simultaneously can filter the air that gets into and accomodate intracavity portion, guarantee to accomodate the clean and tidy of intracavity portion environment, avoid the dust to pile up at accomodating intracavity portion, influence three-phase current detection sensor 16 and three-phase ac contactor 17's heat dissipation, reduce the result of use of protection device body 1.
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.
Claims (6)
1. A current protection device for motor detection, comprising a protection device body (1), characterized in that: the protection device body (1) comprises an outer shell (11), the bottom surface fixedly connected with base (12) of outer shell (11), the positive middle part fixedly connected with wire (13) of outer shell (11), louvre (14) have been seted up to the positive lower extreme of outer shell (11), the back of louvre (14), fixed mounting has dust screen (15), the inside fixed mounting of outer shell (11) has three-phase current detection sensor (16), the rear side fixedly connected with three-phase ac contactor (17) of three-phase current detection sensor (16).
2. A current protection device for motor detection according to claim 1, wherein: the bottom surface of the shell (11) is provided with a containing cavity, and the upper end of the front surface of the shell (11) is provided with a wiring terminal.
3. A current protection device for motor detection according to claim 1, wherein: the cross-sectional area of shell (11) bottom is less than the top area of base (12), the top surface of base (12) is installed the bolt.
4. A current protection device for motor detection according to claim 1, wherein: the dust screen (15) is installed in the containing cavity, and the dust screen (15) is located at the tail end of the heat dissipation hole (14).
5. A current protection device for motor detection according to claim 1, wherein: and the three-phase current detection sensor (16) and the three-phase alternating current contactor (17) are installed in the containing cavity.
6. A current protection device for motor detection according to claim 2, wherein: the protection device body (1) is controlled by a PLC, an NI acquisition card is connected to the three-phase current detection sensor (16), and a power supply and a controller are connected to the three-phase alternating current contactor (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121049879.0U CN215498247U (en) | 2021-05-17 | 2021-05-17 | Current protection device for motor detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121049879.0U CN215498247U (en) | 2021-05-17 | 2021-05-17 | Current protection device for motor detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215498247U true CN215498247U (en) | 2022-01-11 |
Family
ID=79778406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121049879.0U Expired - Fee Related CN215498247U (en) | 2021-05-17 | 2021-05-17 | Current protection device for motor detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215498247U (en) |
-
2021
- 2021-05-17 CN CN202121049879.0U patent/CN215498247U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |