CN112727740A - DC control method and DC control device - Google Patents
DC control method and DC control device Download PDFInfo
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- CN112727740A CN112727740A CN201911028917.1A CN201911028917A CN112727740A CN 112727740 A CN112727740 A CN 112727740A CN 201911028917 A CN201911028917 A CN 201911028917A CN 112727740 A CN112727740 A CN 112727740A
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- electric signal
- direct current
- compressor
- driving
- threshold
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention provides a direct current control method and a direct current control device, wherein the control method is used for controlling and driving compressors of different models and comprises the following steps: receiving a first electrical signal; judging whether the first electric signal is in a working area or not; if so, selecting a driving scheme matched with the currently electrically connected compressor according to the first electric signal, and outputting a second electric signal according to the driving scheme; the second electrical signal is used to drive the electrically connected compressor. The direct current control device is suitable for different application occasions such as hybrid power, communication base stations, uninterruptible power supplies, new wind, light and electricity energy fields and the like, and has the characteristic of one machine with multiple purposes, namely the direct current control device can drive multiple compressors; the power supply has self-adaptability; the model of the compressor is automatically identified, manual intervention is not needed, and the method has the advantages of safety, reliability and the like.
Description
Technical Field
The invention relates to the field of compressors, in particular to a direct current control method and a direct current control device for controlling and driving a compressor.
Background
The base station, namely the public mobile communication base station, is an interface device for accessing the mobile equipment to the internet, the energy consumption of the base station is mainly electricity, along with the development of the communication field, the mobile network is continuously expanded, the number of the base stations is also continuously increased, and the power cost is increased accordingly.
In recent years, the importance of energy sources to human beings is gradually recognized in countries all over the world, and the damage to the environment and the ecosystem in the conventional energy utilization process is further recognized. The countries begin to control and relieve the deteriorated environment according to the national conditions, and the development and utilization of renewable and pollution-free new energy are used as important contents of sustainable development. A wind, light or hybrid power supply mode system is a power supply mode for converting wind energy and solar energy resources into electric energy, is a novel energy power generation system with high cost performance, has good application prospect, and adopts a wind, light and hybrid power supply mode in many base stations at present.
In the wind, light and hybrid power supply mode, a solar battery and a storage battery are/is adopted for supplying power, the power supply mode outputs direct-current voltage between 12V and 48V generally, and therefore a low-voltage compressor is generally adopted as a cooling system for a base station adopting the wind, light and hybrid power supply mode. However, because of the instability of the output voltage of the wind, light and hybrid power supply systems, a dc controller with functions of overvoltage and undervoltage protection, current protection, over-temperature protection and the like is generally required to drive the compressor.
Usually, the dc input voltage of the dc controller is constant, such as 12V, 24V or 48V, i.e. one controller generally corresponds to one compressor, and therefore, there is a great limitation. In terms of circuit structure, the controller can drive compressors of different models under the condition that input voltages are respectively direct current 12V, 24V and 48V, but software of the controller needs to be adjusted according to different direct current voltages and compressors of different models, different software versions exist, and confusion is easy to happen.
A fixed controller can be compatible with a plurality of compressor models and corresponding software versions, and the existing methods mainly include:
the selection of the model is realized through dialing, and the method has the defects that the dialing may cause the wrong selection or the selection omission of the model;
the selection of the model is realized through short jump, and the method has the defects that the short jump possibly has insufficient solder joint, which can cause unsuccessful model selection;
the selection of the machine type is realized through the communication between the upper computer and the lower computer, the cost of the compressor is increased by the upper computer added in the method, and in addition, the machine type needs to be manually selected in the method.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present invention and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.
Disclosure of Invention
In view of the problems in the prior art, an object of the present invention is to provide a dc control method and a dc control apparatus, which can drive compressors of different models.
The implementation of the invention provides a direct current control method, which comprises the following steps:
receiving a first electrical signal;
judging whether the first electric signal is in a working area or not;
if so, selecting a driving scheme matched with the currently electrically connected compressor according to the first electric signal, and outputting a second electric signal according to the driving scheme; the second electrical signal is used to drive the electrically connected compressor.
According to an example of the present invention, the first electrical signal is a direct current voltage signal.
According to an example of the present invention, the dc voltage is equal to or less than a threshold voltage.
According to an example of the present invention, the operating region is a region where the dc voltage is between a first threshold and a fourth threshold;
the selection of a driving scheme matching a currently electrically connected compressor according to the detected first electric signal includes the steps of:
judging whether the detected first electric signal is larger than a first threshold value;
if the first electric signal is less than or equal to a first threshold value, judging that the fault is an undervoltage fault;
selecting a first drive scheme if the first electrical signal is greater than a first threshold and less than or equal to a second threshold;
selecting a second drive scheme if the first electrical signal is greater than a second threshold and less than or equal to a third threshold;
selecting a third drive scheme if the first electrical signal is greater than a third threshold and less than or equal to a fourth threshold;
and if the first electric signal is larger than a fourth threshold value, judging that the overvoltage fault exists.
According to an example of the present invention, the compressor is a compressor using a permanent magnet synchronous motor.
The embodiment of the present invention further provides a dc control apparatus for controlling and driving compressors of different models, including:
the device comprises an input unit, a detection unit, a driving unit and an output unit;
the input unit is used for receiving a first electric signal;
the detection unit is used for judging whether the first electric signal is in a working area or not;
the output unit is electrically connected with the input end of the compressor;
the driving unit is prestored with at least one driving scheme;
the driving unit is used for selecting a driving scheme matched with the current electrically connected compressor according to the first electric signal and outputting a second electric signal at the output unit according to the driving scheme, wherein the second electric signal is used for driving the electrically connected compressor.
According to an example of the present invention, the first electrical signal is a direct current voltage signal.
According to an example of the present invention, the detecting unit is a voltage detecting circuit for detecting a value region of the first electrical signal.
According to an example of the present invention, the compressor is a compressor using a permanent magnet synchronous motor.
The direct current control device is suitable for different application occasions, such as 12V/24V/48V hybrid power, communication base stations, uninterruptible power supplies and the field of new wind, light and electricity energy, and has the following advantages:
the machine has multiple functions, namely the direct current control device can drive multiple compressors;
self-adapting of a power supply;
the model of the compressor is automatically identified, manual intervention is not needed, and safety and reliability are achieved.
Drawings
Other features, objects, and advantages of the invention will be apparent from the following detailed description of non-limiting embodiments, which proceeds with reference to the accompanying drawings and which is incorporated in and constitutes a part of this specification, illustrating embodiments consistent with the present application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a flow chart of a DC control method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a dc control device according to an embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.
Fig. 1 is a flowchart of a dc control method according to an embodiment of the present invention, which is a method for implementing a dc control device to control and drive compressors of different models, and includes the following steps:
s100: receiving a first electrical signal; for some base stations using wind, light and hybrid power supply methods, the first electrical signal in this application is a dc voltage signal output by the wind, light and hybrid power supply methods, and typically, such dc voltage is 12V, 24V or 48V, which is a dc voltage less than or equal to a threshold voltage, where the threshold voltage may be a maximum voltage resistance value of the device in the present invention, or a set voltage value, and in an embodiment of the present invention, the threshold voltage is 48V.
Accordingly, there are different models of compressors, such as a 12V compressor, a 24V compressor, or a 48V compressor, depending on the different supply voltages. In practical applications, although compressors with different operating voltages can operate at a certain operating voltage, for example, a 12V compressor can operate at 12V, 24V or 48V, the energy efficiency at 24V or 48V cannot meet the requirements of customers. Therefore, for a compressor model, there is a matching drive scheme, and the compressor operates most energy efficiently under the control of the matching drive scheme.
S200: judging whether the first electric signal is in a working area or not; in practice, there is generally a step of correcting the first electrical signal sample S101.
In the embodiment of the present invention, a certain low-voltage dc is divided into a working area in which the compressor can be driven to operate and a non-working area in which the compressor cannot be driven to operate, and when the value of the first electrical signal is in the non-working area, the dc control device executes S201 to display a failure step.
If the first electric signal is in the working area, executing S300, namely selecting a driving scheme matched with the current electrically connected compressor according to the first electric signal,
in an embodiment, the low critical voltage and the high critical voltage of the working region are respectively defined as a first threshold and a fourth threshold, that is, the working region is a region where the dc voltage is between the first threshold and the fourth threshold;
the selecting a driving scheme matching with the currently electrically connected compressor according to the detected first electrical signal in the step S300 may further include the steps of:
judging whether the detected first electric signal is larger than a first threshold value;
if the first electric signal is less than or equal to a first threshold value, judging that the fault is an undervoltage fault;
selecting a first drive scheme if the first electrical signal is greater than a first threshold and less than or equal to a second threshold;
selecting a second drive scheme if the first electrical signal is greater than a second threshold and less than or equal to a third threshold;
selecting a third drive scheme if the first electrical signal is greater than a third threshold and less than or equal to a fourth threshold;
and if the first electric signal is larger than a fourth threshold value, judging that the overvoltage fault exists.
The first, second and third drive schemes of the present invention correspond to drive schemes of the compressor having the operating voltage between the first and second threshold values, the second and third threshold values, and the third and fourth threshold values, respectively.
And finally executing S400: outputting a second electrical signal according to the drive scheme; the second electrical signal is used to drive the electrically connected compressor.
Outputting a second electrical signal according to the driving scheme in step S400; the second electrical signal is used to drive the electrically connected compressor. Specifically, each of the driving schemes includes parameters such as a trigger current value, a pulse width value, a trigger action time length, and a voltage/current value during steady operation of the currently electrically connected compressor, and accordingly, the second electrical signal output according to the driving scheme includes a voltage, a current value, and the like at each stage of driving the compressor to operate, and in different driving schemes, the voltage and the current value vary according to the difference of the compressors, the load of the compressor, and the operating state of the compressor.
In the embodiment of the invention, the compressor can be a compressor adopting a permanent magnet synchronous motor. The compressor adopting the permanent magnet synchronous motor has the advantages of high efficiency, small starting current, large starting torque and the like, and is more suitable for the low-voltage working environment. When the compressor is a compressor adopting a permanent magnet synchronous motor, the driving scheme comprises
The invention also provides a direct current control device, which is used for controlling and driving compressors of different models and comprises:
an input unit M100, a detection unit M200, a driving unit M300, and an output unit M400,
The input unit M100 is configured to receive a first electrical signal; the first electrical signal may be a direct current voltage signal;
the detection unit M200 is configured to determine whether the first electrical signal is in a working area; in the embodiment of the invention, a certain low-voltage direct current is divided into a working area capable of driving the compressor to operate and a non-working area incapable of driving the compressor to operate, and when the value of the first electric signal is in the non-working area, the direct current control device displays a fault.
The driving unit M300 is pre-stored with at least one driving scheme; the driving scheme herein is not limited to the three listed in the above-described direct current control method;
the output unit M400 is electrically connected with the input end of the compressor;
the driving unit M300 selects a driving scheme matched with the currently electrically connected compressor according to the first electric signal, and outputs a second electric signal for driving the electrically connected compressor at the output unit M400 according to the driving scheme. The driving scheme has important significance for improving the energy efficiency and the performance of the compressor, and different driving schemes in the application correspond to the optimal scheme during different-stage operation of compressors of different models, or the operation scheme with the highest energy efficiency.
In the dc control apparatus of an embodiment, as shown in fig. 2, the input unit M100 is configured to receive a first electrical signal, where the first electrical signal may be an input dc voltage of 12V, 24V, or 48V, and the input unit M100 may also be configured to provide power with various specifications to other modules in the apparatus. In this embodiment, the detecting unit M200 is a voltage detecting circuit for detecting a value range of the first electrical signal. The output unit M400 may also be configured to receive a voltage, a current, or a fault signal when the fed back compressor operates, and feed back the received signal to the detection unit M200, where the detection unit 200 is further configured to determine whether the model of the compressor is selected.
Preferably, the compressor is a compressor using a permanent magnet synchronous motor.
In summary, the present invention provides a dc control method and a dc control apparatus for controlling and driving compressors, which realizes that one dc control apparatus drives a plurality of types of compressors, can omit steps of manually selecting driving schemes of different compressors, and has the advantages of safety, reliability, and the like.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application 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 application 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 is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the apparatus claims may also be implemented by one unit or means in software or hardware. It is to be understood that the terms "lower" or "upper", "downward" or "upward" and the like are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures; the terms first, second, etc. are used to denote names, but not any particular order.
Claims (9)
1. A direct current control method is used for controlling and driving compressors of different models, and is characterized by comprising the following steps:
receiving a first electrical signal;
judging whether the first electric signal is in a working area or not;
if so, selecting a driving scheme matched with the currently electrically connected compressor according to the first electric signal, and outputting a second electric signal according to the driving scheme; the second electrical signal is used to drive the electrically connected compressor.
2. The direct current control method according to claim 1, characterized in that: the first electrical signal is a direct current voltage signal.
3. The direct current control method according to claim 2, characterized in that: the direct current voltage is less than or equal to a threshold voltage.
4. The direct current control method according to claim 2, characterized in that: the working area is an area where the direct-current voltage is between a first threshold value and a fourth threshold value;
the selection of a driving scheme matching a currently electrically connected compressor according to the detected first electric signal includes the steps of:
judging whether the detected first electric signal is larger than a first threshold value;
if the first electric signal is less than or equal to a first threshold value, judging that the fault is an undervoltage fault;
selecting a first drive scheme if the first electrical signal is greater than a first threshold and less than or equal to a second threshold;
selecting a second drive scheme if the first electrical signal is greater than a second threshold and less than or equal to a third threshold;
selecting a third drive scheme if the first electrical signal is greater than a third threshold and less than or equal to a fourth threshold;
and if the first electric signal is larger than a fourth threshold value, judging that the overvoltage fault exists.
5. The direct current control method according to claim 1, characterized in that: the compressor is a compressor adopting a permanent magnet synchronous motor.
6. A dc control apparatus for controlling and driving compressors of different models, comprising:
the device comprises an input unit, a detection unit, a driving unit and an output unit;
the input unit is used for receiving a first electric signal;
the detection unit is used for judging whether the first electric signal is in a working area or not;
the output unit is electrically connected with the input end of the compressor;
the driving unit is prestored with at least one driving scheme;
the driving unit is used for selecting a driving scheme matched with the current electrically connected compressor according to the first electric signal and outputting a second electric signal at the output unit according to the driving scheme, wherein the second electric signal is used for driving the electrically connected compressor.
7. The direct current control device according to claim 6, characterized in that: the first electrical signal is a direct current voltage signal.
8. The direct current control device according to claim 7, characterized in that: the detection unit is a voltage detection loop and is used for detecting a numerical value area of the first electric signal.
9. The direct current control device according to claim 6, characterized in that: the compressor is a compressor adopting a permanent magnet synchronous motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911028917.1A CN112727740B (en) | 2019-10-28 | 2019-10-28 | DC control method and DC control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911028917.1A CN112727740B (en) | 2019-10-28 | 2019-10-28 | DC control method and DC control device |
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| CN112727740A true CN112727740A (en) | 2021-04-30 |
| CN112727740B CN112727740B (en) | 2022-08-09 |
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| CN103780173A (en) * | 2012-10-25 | 2014-05-07 | 海尔集团公司 | Control method matched with various kinds of direct current brushless motor drive programs |
| CN105339661A (en) * | 2013-05-01 | 2016-02-17 | 流量控制有限责任公司 | Pump using multi voltage electronics with run dry and over current protection |
| CN106870343A (en) * | 2017-03-31 | 2017-06-20 | 四川长虹电器股份有限公司 | A kind of unitized motor drives matching process |
| CN107035713A (en) * | 2017-05-25 | 2017-08-11 | 广东万和热能科技有限公司 | A kind of automatic identifying method and device of DC fan type |
| CN108270376A (en) * | 2018-01-22 | 2018-07-10 | 青岛海尔空调电子有限公司 | The method and device of air conditioning frequency converter parameter is configured |
| CN108362053A (en) * | 2018-01-31 | 2018-08-03 | 南京创维电器研究院有限公司 | A kind of frequency-changeable compressor control parameter automatic matching method and identifying system |
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2019
- 2019-10-28 CN CN201911028917.1A patent/CN112727740B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780173A (en) * | 2012-10-25 | 2014-05-07 | 海尔集团公司 | Control method matched with various kinds of direct current brushless motor drive programs |
| CN105339661A (en) * | 2013-05-01 | 2016-02-17 | 流量控制有限责任公司 | Pump using multi voltage electronics with run dry and over current protection |
| CN106870343A (en) * | 2017-03-31 | 2017-06-20 | 四川长虹电器股份有限公司 | A kind of unitized motor drives matching process |
| CN107035713A (en) * | 2017-05-25 | 2017-08-11 | 广东万和热能科技有限公司 | A kind of automatic identifying method and device of DC fan type |
| CN108270376A (en) * | 2018-01-22 | 2018-07-10 | 青岛海尔空调电子有限公司 | The method and device of air conditioning frequency converter parameter is configured |
| CN108362053A (en) * | 2018-01-31 | 2018-08-03 | 南京创维电器研究院有限公司 | A kind of frequency-changeable compressor control parameter automatic matching method and identifying system |
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| CN112727740B (en) | 2022-08-09 |
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