CN209928304U - Device for keeping output power and current of load constant - Google Patents
Device for keeping output power and current of load constant Download PDFInfo
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- CN209928304U CN209928304U CN201921055681.6U CN201921055681U CN209928304U CN 209928304 U CN209928304 U CN 209928304U CN 201921055681 U CN201921055681 U CN 201921055681U CN 209928304 U CN209928304 U CN 209928304U
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Abstract
The embodiment of the utility model discloses a device for keeping the output power and the current of a load constant, which comprises a monitoring unit, a control unit and a control unit, wherein the monitoring unit is used for monitoring whether the input voltage of the load changes in real time; the acquisition unit is used for acquiring the current input voltage when the input voltage of the load is monitored to change; and the adjusting unit is used for adjusting the resistance value of the load according to the output power and current of the load preset by the central processing unit and the current input voltage so as to keep the preset output power and current of the load constant. The utility model discloses a real-time supervision load's input voltage whether changes to adjust the resistance of load according to the result of monitoring, and then make the output and the electric current of load invariable.
Description
Technical Field
The embodiment of the utility model provides a relate to electron technical field, concretely relates to output and the invariable device of electric current that keeps load.
Background
The power dissipation element inside the load is a resistor, so the load itself is affected by ohm's law (P ═ U)2R), i.e. the output power of the load is influenced by the input voltage, e.g. the load resistance of AC220V, 10KW is 4.84 ohms (R ═ U)2/P), when the input voltage is rated voltage 220V, the output power of the equipment is 10KW, but when the input voltage is changed to 110V, the output power of the equipment is 2.5KW, thereby leading the output power of the equipment to be 2.5KWThe output power of the load fluctuates greatly, which may cause serious influence on the load during operation, and similarly, the current of the load is also influenced by the input voltage.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the present invention provides a device for keeping the output power and the current of a load constant, so as to solve the problem in the prior art that the output power and the current of the load fluctuate greatly due to the change of the voltage.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
according to a first aspect of embodiments of the present invention, there is provided a method of keeping output power and current of a load constant, the method comprising monitoring in real time whether an input voltage of the load changes;
when the input voltage of the load is monitored to change, acquiring the current input voltage;
and adjusting the resistance value of the load according to the preset output power and current of the load and the current input voltage of a central processing unit so as to keep the preset output power and current of the load constant.
Further, the resistance of the load is connected with a relay;
the adjusting the resistance value of the load specifically includes:
and adjusting the relay to realize the resistance value adjustment of the load.
Furthermore, the relay is a gear relay provided with a plurality of loads with different specifications.
Further, after the adjusting the resistance value of the load, the method further includes:
and recording the current resistance value of the load, and sending the current resistance value, the current output power and the current of the load to a display interface.
Further, when it is monitored that the input voltage of the load does not change, the step of monitoring whether the input voltage of the load changes in real time is continuously executed.
Further, before the real-time monitoring whether the input voltage of the load changes, the method further includes:
the output power and current of the load are preset.
According to a second aspect of the embodiments of the present invention, there is provided an apparatus for keeping output power and current of a load constant, the apparatus comprising:
the monitoring unit is used for monitoring whether the input voltage of the load changes in real time;
the acquisition unit is used for acquiring the current input voltage when the input voltage of the load is monitored to change;
and the adjusting unit is used for adjusting the resistance value of the load according to the output power and current of the load preset by the central processing unit and the current input voltage so as to keep the preset output power and current of the load constant.
Further, the resistor of the load is connected with a relay;
the adjusting unit is specifically configured to:
and adjusting the relay to realize the resistance value adjustment of the load.
Furthermore, the relay is a gear relay provided with a plurality of loads with different specifications.
Further, the apparatus further comprises:
the recording unit is used for recording the current resistance value of the load;
and the sending unit is used for sending the current resistance value, the current output power and the current of the load to a display interface.
Further, when the obtaining unit monitors that the input voltage of the load does not change, the monitoring unit continuously monitors whether the input voltage of the load changes in real time.
Further, the apparatus further comprises:
and the setting unit is used for presetting the output power and the current of the load.
Further, the central processing unit is a PLC central processing unit.
Further, the acquisition unit is an electrical parameter acquisition module.
The embodiment of the utility model provides a have following advantage: the utility model discloses a real-time supervision load's input voltage whether changes to adjust the resistance of load according to the result of monitoring, and then make the output and the electric current of load invariable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a schematic flowchart of a method for keeping output power and current of a load constant according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a method for keeping output power and current of a load constant according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a device for keeping output power and current of a load constant according to a third embodiment of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. 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.
Fig. 1 is a schematic flowchart of a method for keeping output power and current of a load constant according to an embodiment of the present disclosure, where the schematic flowchart includes:
and step S101, monitoring whether the input voltage of the load changes in real time.
And step S102, when the input voltage of the load is monitored to change, acquiring the current input voltage.
Step S103, adjusting a resistance value of the load according to the preset output power and current of the load and the current input voltage to keep the preset output power and current of the load constant.
Fig. 2 is a schematic flowchart of a method for keeping output power and current of a load constant according to a second embodiment of the present disclosure, where the schematic flowchart includes:
in step S201, the output power and the current of the load are preset.
In step S201 of the embodiment of the present disclosure, a user may set an output power value and a current value of a load through a human-machine interface, and send an instruction to the PLC central processing unit through the touch screen.
Step S202, monitoring whether the input voltage of the load changes in real time, if so, executing step S203, and if not, continuing to execute step S202.
In step S202 of the embodiment, an electrical parameter acquisition module may be used to measure an input voltage value of a load, and the electrical parameter acquisition module may be a voltmeter or a multimeter for measuring the voltage value.
In step S202 in the embodiment, when the input voltage of the load is monitored in real time, there is a monitoring error, that is, it is determined that the input voltage has not changed within a certain range, for example, the error range is 0.2V, and when the voltage value before monitoring is 5V, it cannot be determined that the voltage value has changed when the monitored voltage value becomes 5.2V.
In step S203, the current input voltage is obtained.
Step S204, adjusting a resistance value of the load according to the preset output power and current of the load and the current input voltage, so as to keep the preset output power and current of the load constant.
In step S204 of the illustrated embodiment, a resistor of the load is connected to the relay. The relay is a gear relay provided with a plurality of loads with different specifications. Different resistance values are adjusted by switching the gear of the relay, so that the output power and the current of the load are kept constant. The method for adjusting the resistance value of the load specifically comprises the following steps: and adjusting the relay to realize the resistance value adjustment of the load.
After the resistance value of the load is adjusted, the following steps may be further performed: and recording the current resistance value of the load, and sending the current resistance value, the current output power and the current of the load to a display interface.
The above process may be continuously cycled.
The load can be controlled by the PLC central processing unit to the touch screen. Replace traditional physical button and switch, improve the availability factor of equipment.
Fig. 3 is a schematic structural diagram of an apparatus for keeping output power and current of a load constant according to a third embodiment of the present disclosure, where the schematic structural diagram includes: detection unit 1, acquisition unit 2, adjustment unit 3, recording unit 4, and generation unit 5.
The monitoring unit 1 is used for monitoring whether the input voltage of the load changes in real time;
the obtaining unit 2 is configured to obtain a current input voltage when it is monitored that the input voltage of the load changes;
the adjusting unit 3 is configured to adjust the resistance value of the load according to the preset output power and current of the load and the current input voltage, so as to keep the preset output power and current of the load constant.
The resistor of the load is connected with the relay;
the adjusting unit 3 is specifically configured to:
and adjusting the relay to realize the resistance value adjustment of the load.
The relay is a gear relay provided with a plurality of loads of different specifications.
The recording unit 4 is used for recording the current resistance value of the load;
the sending unit 5 is configured to send the current resistance value, the output power, and the current of the load to a display interface.
When the obtaining unit 2 monitors that the input voltage of the load does not change, the monitoring unit 1 continues to monitor whether the input voltage of the load changes in real time.
The setting unit 6 is used for presetting the output power and the current of the load.
The central processing unit is a PLC central processing unit.
The acquisition unit is an electrical parameter acquisition module.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. An apparatus for maintaining constant output power and current of a load, the apparatus comprising:
the monitoring unit is used for monitoring whether the input voltage of the load changes in real time;
the acquisition unit is used for acquiring the current input voltage when the input voltage of the load is monitored to change;
and the adjusting unit is used for adjusting the resistance value of the load according to the output power and current of the load preset by the central processing unit and the current input voltage so as to keep the preset output power and current of the load constant.
2. The apparatus for maintaining constant output power and current of a load according to claim 1, wherein the resistance of the load is connected to a relay;
the adjusting unit is specifically configured to:
and adjusting the relay to realize the resistance value adjustment of the load.
3. The apparatus for maintaining constant output power and current of a load according to claim 2, wherein said relay is a step relay provided with a plurality of loads of different specifications.
4. The apparatus for maintaining constant output power and current of a load according to claim 1, further comprising:
the recording unit is used for recording the current resistance value of the load;
and the sending unit is used for sending the current resistance value, the current output power and the current of the load to a display interface.
5. The apparatus according to claim 1, wherein when the obtaining unit detects that the input voltage of the load has not changed, the monitoring unit continuously monitors whether the input voltage of the load has changed in real time.
6. The apparatus for maintaining constant output power and current of a load according to claim 1, further comprising:
and the setting unit is used for presetting the output power and the current of the load.
7. The apparatus for maintaining constant output power and current of a load according to claim 1, wherein said central processing unit is a PLC central processing unit.
8. The apparatus for keeping output power and current of a load constant according to claim 1, wherein the obtaining unit is an electrical parameter collecting module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921055681.6U CN209928304U (en) | 2019-07-08 | 2019-07-08 | Device for keeping output power and current of load constant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921055681.6U CN209928304U (en) | 2019-07-08 | 2019-07-08 | Device for keeping output power and current of load constant |
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| CN209928304U true CN209928304U (en) | 2020-01-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221646A (en) * | 2019-07-08 | 2019-09-10 | 上海文顺电器有限公司 | A kind of output power and the constant method and device of electric current of holding load |
| CN114533321A (en) * | 2022-04-18 | 2022-05-27 | 深圳市宏丰科技有限公司 | Control circuit and method for tooth washing device |
-
2019
- 2019-07-08 CN CN201921055681.6U patent/CN209928304U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221646A (en) * | 2019-07-08 | 2019-09-10 | 上海文顺电器有限公司 | A kind of output power and the constant method and device of electric current of holding load |
| CN114533321A (en) * | 2022-04-18 | 2022-05-27 | 深圳市宏丰科技有限公司 | Control circuit and method for tooth washing device |
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