CN204008747U - A kind of automatic variable-resistance device - Google Patents
A kind of automatic variable-resistance device Download PDFInfo
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- CN204008747U CN204008747U CN201420283196.5U CN201420283196U CN204008747U CN 204008747 U CN204008747 U CN 204008747U CN 201420283196 U CN201420283196 U CN 201420283196U CN 204008747 U CN204008747 U CN 204008747U
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- binding post
- resistance
- current
- drive motor
- guide rod
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Abstract
The utility model relates to circuit conditioning field, a kind of automatic variable-resistance device is disclosed, it comprises adjustment control, drive motor, transmission component, current transducer, bearing and slide rheostat, described slide rheostat comprises slide assemblies, guide rod and resistance body, described slide assemblies is sleeved on described guide rod, be slidably connected with described guide rod, and described slide assemblies is erected on described resistance body, described drive motor is connected with described transmission component, described transmission component is connected with described slide assemblies by web member, the voltage input end of described adjustment control, current input terminal respectively corresponding voltage input end is connected with current input terminal, its control signal output terminal is connected with described drive motor.The utility model can carry out fine adjustment to resistance, voltage, three kinds of setting values of electric current, and fast response time, and human body and charging equipment have been carried out to effective isolation, and security performance is high.
Description
Technical field
The utility model relates to circuit conditioning technical field, particularly relates to a kind of automatic variable-resistance device.
Background technology
Rheostat is used widely in physics laboratory and power engineering site test; physics laboratory is used for carrying out Experiment of Electrical Circuits, and in power engineering, generator excited system test is used for carrying out little current loading verification, rotor earth fault protection is used for carrying out 2 ground connection of model rotor etc.No matter existing rheostat is slide-changing resistor or variable rheostat, be all to rely on manual adjustments to change resistance value, often cannot accomplish accurate control, there is certain deviation in the resistance value and the required value that change, during as variable dividing potential drop, shunt resistance, to electric current and voltage, cannot accomplish accurate control, do not possess from dynamic response and control function, brought impact to the accuracy of resistance adjustment and the convenience of work.
Utility model content
(1) technical matters that will solve
The purpose of this utility model is to provide a kind of automatic variable-resistance device, and it can carry out fine adjustment to resistance, voltage, three kinds of setting values of electric current, and fast response time, and human body and charging equipment have been carried out to effective isolation, and security performance is high.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of automatic variable-resistance device, it comprises adjustment control, drive motor, transmission component, current transducer, bearing and slide rheostat, described slide rheostat comprises slide assemblies, guide rod and resistance body, described slide assemblies is sleeved on described guide rod, be slidably connected with described guide rod, and described slide assemblies is erected on described resistance body, described drive motor is connected with described transmission component, be used for driving described transmission component to move along described guide rod direction, described transmission component is connected with described slide assemblies by web member, described bearing and described current transducer are located at respectively the top, two ends of described resistance body, the two ends of described guide rod are connected with described current transducer with described bearing respectively, described bearing is provided with the first binding post, described current transducer is provided with two current terminals and the second binding post, the bottom, two ends of described resistance body is respectively equipped with the 3rd binding post and the 4th binding post, described the 3rd binding post and described the first binding post homonymy, the voltage input end of described adjustment control is connected with the 4th binding post with described the first binding post respectively, its current input terminal is connected with described two current terminals respectively, its control signal output terminal is connected with described drive motor, described the second binding post, the 3rd binding post is connected with external circuit respectively with the 4th binding post.
Wherein, described adjustment control is PID controller.
Wherein, on described PID controller, be respectively equipped with zero line voltage input end and hot voltage input end.
Wherein, described drive motor is servomotor.
Wherein, described slide assemblies comprises that sliding shoe is with two that are located at described sliding shoe lower end the slide plates that angle arranges, and described slide plate is erected on described resistance body.
Wherein, described transmission component comprises turn-screw and transmission screw, and described transmission screw engage sleeves is connected on described turn-screw, and described transmission screw is connected with described sliding shoe by web member.
Wherein, described drive motor is connected with described turn-screw by shaft coupling.
Wherein, the permission range of current of described current terminal is 4-20mA.
(3) beneficial effect
Compared with prior art, the utlity model has following advantage:
A kind of automatic variable-resistance device that the utility model provides, adopt drive motor to be connected with transmission component, be used for driving described transmission component to move along described guide rod direction, described transmission component is connected with described slide assemblies by web member, be used for driving described slide assemblies to slide on resistance, the voltage input end of adjustment control is connected with the 4th binding post with described the first binding post respectively, after externally circuit connects, for measuring the voltage that is added in resistance two ends, its current input terminal is connected with described two current terminals respectively, for measuring the electric current that flows through resistance, its control signal output terminal is connected with described drive motor, the voltage that utilization records, current value calculates resistance value in real time, and obtain deviation with the resistance value of prior setting, according to deviation, automatically control that drive motor regulates slide assemblies so that resistance reaches setting value, realized variable-resistance automatic fine adjustment.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of automatic variable-resistance device of the utility model.
In figure: 1: adjustment control; 2: drive motor; 3: shaft coupling; 4: transmission screw; 5: turn-screw; 6: sliding shoe; 7: guide rod; 8: resistance body; 9: the first binding posts; 10: the second binding posts; 11: the three binding posts; 12: the four binding posts; 13: current transducer; 14: the first current terminals; 15: the second current terminals; 16: web member; 17: bearing.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following instance is used for illustrating the utility model, but is not used for limiting scope of the present utility model.
In description of the present utility model, it should be noted that, term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second ", " the 3rd " etc. are only for describing object, and can not be interpreted as indication or hint relative importance.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand the concrete meaning of above-mentioned term in the utility model.
As shown in Figure 1, a kind of automatic variable-resistance device providing for the utility model, it comprises adjustment control 1, drive motor 2, transmission component, current transducer 13, bearing 17 and slide rheostat, described slide rheostat comprises slide assemblies, guide rod 7 and resistance body 8, described slide assemblies is sleeved on described guide rod 7, be slidably connected with described guide rod 7, and described slide assemblies is erected on described resistance body 8, described slide assemblies comprises sliding shoe 6 and is located at two slide plates that are angle setting of described sliding shoe 6 lower ends, by described slide plate, be erected on described resistance body 8, be used for by the slip of slide plate, change the size of resistance, described drive motor 2 is connected with described transmission component, for driving described transmission component to move along the horizontal direction at described guide rod 7 places, described transmission component is connected with described slide assemblies by web member 16, described web member 16 can be connecting link, described transmission component comprises turn-screw 5 and transmission screw 4, described transmission screw 4 engage sleeves are connected on described turn-screw 5, described transmission screw 4 is connected with described sliding shoe 6 by web member 16, described drive motor 2 is connected with described turn-screw 5 by shaft coupling 3, described bearing 17 and described current transducer 13 are located at respectively the top, two ends of described resistance body 8, the two ends of described guide rod 7 are connected with described current transducer 13 with described bearing 17 respectively, be used for supporting described guide rod 7, described bearing 17 is provided with the first binding post 9, described current transducer 13 is provided with two current terminals and the second binding post 10, described two current terminals are respectively the first current terminal 14 and the second current terminal 15, the bottom, two ends of described resistance body 8 is respectively equipped with the 3rd binding post 11 and the 4th binding post 12, described the 3rd binding post 11 and described the first binding post 9 homonymy settings, described the second binding post 10 and the 4th binding post 12 homonymy settings, the voltage input end of described adjustment control 1 is connected with the 4th binding post 12 with described the first binding post 9 respectively, voltage for measuring resistance two ends, its current input terminal is connected with described two current terminals respectively, for measuring the electric current that flows through resistance two ends, its control signal output terminal is connected with described drive motor 2, described the second binding post 10, the 3rd binding post 11 is connected with external circuit respectively with the 4th binding post 12.The voltage that utilization records, current value calculate resistance value in real time, and obtain deviation with the resistance value of prior setting, automatically control drive motor 2 regulate slide assemblies so that resistance reaches setting value according to deviation, realize automatic pinpoint closed-loop control; Also can preset magnitude of voltage or current value, by capable of self adjusting resistance, reach setting value simultaneously; Without staff, regulate, automatic fast response time, and human body and charging equipment have been carried out to effective isolation, safe.
Preferably, described adjustment control 1 is PID controller (Proportion IntegrationDifferentiation proportional-integral derivative controller), by ratio unit P, integral unit I and differentiation element D, formed, described PID controller is, according to PID control principle, whole control system is carried out to bias adjustment, thereby make the actual value of controlled variable and the predetermined value of technological requirement consistent, control procedure is accurate, stable.
On described PID controller, be respectively equipped with zero line voltage input end N and hot voltage input end L, for the zero line of the power supply with corresponding, be connected with live wire, to avoid wrong line.
Described drive motor 2 is preferably servomotor, and its moment of inertia is little, trigger voltage is low, no-load current is little.
The permission range of current of described current terminal is 4-20mA, with the running current of holding circuit.
The utility model can carry out fine adjustment to resistance, voltage, three kinds of setting values of electric current, automatic fast response time, and human body and charging equipment have been carried out to effective isolation, safe.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. an automatic variable-resistance device, it is characterized in that, comprise adjustment control, drive motor, transmission component, current transducer, bearing and slide rheostat, described slide rheostat comprises slide assemblies, guide rod and resistance body, described slide assemblies is sleeved on described guide rod, be slidably connected with described guide rod, and described slide assemblies is erected on described resistance body, described drive motor is connected with described transmission component, be used for driving described transmission component to move along described guide rod direction, described transmission component is connected with described slide assemblies by web member, described bearing and described current transducer are located at respectively the top, two ends of described resistance body, the two ends of described guide rod are connected with described current transducer with described bearing respectively, described bearing is provided with the first binding post, described current transducer is provided with two current terminals and the second binding post, the bottom, two ends of described resistance body is respectively equipped with the 3rd binding post and the 4th binding post, described the 3rd binding post and described the first binding post homonymy, the voltage input end of described adjustment control is connected with the 4th binding post with described the first binding post respectively, its current input terminal is connected with described two current terminals respectively, its control signal output terminal is connected with described drive motor, described the second binding post, the 3rd binding post is connected with external circuit respectively with the 4th binding post.
2. automatic variable-resistance device as claimed in claim 1, is characterized in that, described adjustment control is PID controller.
3. automatic variable-resistance device as claimed in claim 2, is characterized in that, is respectively equipped with zero line voltage input end and hot voltage input end on described PID controller.
4. automatic variable-resistance device as claimed in claim 1, is characterized in that, described drive motor is servomotor.
5. automatic variable-resistance device as claimed in claim 1, is characterized in that, described slide assemblies comprises that sliding shoe is with two that are located at described sliding shoe lower end the slide plates that angle arranges, and described slide plate is erected on described resistance body.
6. automatic variable-resistance device as claimed in claim 5, is characterized in that, described transmission component comprises turn-screw and transmission screw, and described transmission screw engage sleeves is connected on described turn-screw, and described transmission screw is connected with described sliding shoe by web member.
7. automatic variable-resistance device as claimed in claim 6, is characterized in that, described drive motor is connected with described turn-screw by shaft coupling.
8. automatic variable-resistance device as claimed in claim 1, is characterized in that, the permission range of current of described current terminal is 4-20mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420283196.5U CN204008747U (en) | 2014-05-29 | 2014-05-29 | A kind of automatic variable-resistance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420283196.5U CN204008747U (en) | 2014-05-29 | 2014-05-29 | A kind of automatic variable-resistance device |
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| Publication Number | Publication Date |
|---|---|
| CN204008747U true CN204008747U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420283196.5U Expired - Fee Related CN204008747U (en) | 2014-05-29 | 2014-05-29 | A kind of automatic variable-resistance device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044646A (en) * | 2015-09-11 | 2015-11-11 | 郑州众智科技股份有限公司 | Output potential calibration device |
| CN105445590A (en) * | 2015-12-16 | 2016-03-30 | 中能易电新能源技术有限公司 | Photovoltaic inverter leakage current protection motion automatic testing device |
| CN107145185A (en) * | 2017-04-01 | 2017-09-08 | 廖华勇 | It can be self-regulated and maintain the electronic component of rated voltage electric current output |
-
2014
- 2014-05-29 CN CN201420283196.5U patent/CN204008747U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044646A (en) * | 2015-09-11 | 2015-11-11 | 郑州众智科技股份有限公司 | Output potential calibration device |
| CN105445590A (en) * | 2015-12-16 | 2016-03-30 | 中能易电新能源技术有限公司 | Photovoltaic inverter leakage current protection motion automatic testing device |
| CN107145185A (en) * | 2017-04-01 | 2017-09-08 | 廖华勇 | It can be self-regulated and maintain the electronic component of rated voltage electric current output |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20180529 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |