CN102168680B - Method for controlling photovoltaic centrifugal water pump to start and stop by using working current of motor - Google Patents
Method for controlling photovoltaic centrifugal water pump to start and stop by using working current of motor Download PDFInfo
- Publication number
- CN102168680B CN102168680B CN201010114275.XA CN201010114275A CN102168680B CN 102168680 B CN102168680 B CN 102168680B CN 201010114275 A CN201010114275 A CN 201010114275A CN 102168680 B CN102168680 B CN 102168680B
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- water pump
- water
- current
- photovoltaic
- chip microcomputer
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Abstract
The invention relates to a method for controlling a photovoltaic centrifugal water pump to start and stop by using a working current of a motor. The method is characterized by comprising the following steps: a sampling resistor is connected to a controller to sample a motor current; and then the motor current is transmitted to a single chip microcomputer; the single chip microcomputer judges whether the water exists or not through comparing and analyzing a current value; the controller outputs a water pump stopping signal while a value obtained by a sampling circuit is less than a set drying value; after the water pump stops for a period of set time, the controller outputs a water pump starting signal; the water pump tries to be started; if water still does not exist, the water pump continues to stop for waiting until water exists; and then the water pump continues to work. The method provided by the invention has the advantages of good real-time water level control of software and low fault rate, and can completely satisfy water level control requirements of the photovoltaic water pump.
Description
Technical field
The present invention relates to a kind of motor working current of utilizing and photovoltaic centrifugal water pump is carried out to the method for on off control.
Background technique
Photovoltaic water pump is the optical, mechanical and electronic integration system developing rapidly in recent years, the electric power that it utilizes solar cell to send, by intelligent controller, control water pump, thereby realize, begin work at sunrise, sunset and ceasing, without personnel, keep an eye on, maintenance workload can be down to minimum, is the desirable green energy resource technical products that integrates economical, reliability and the feature of environmental protection.Therefore be particularly suitable for the use in high mountain power outage area, because it is small-sized water pump, flow is very little, will realize unattendedly, automatically beats dry protection, will get rid of as much as possible some uncertain factors, makes the rate of fault of photovoltaic water pump drop to minimum.What use at present is level sensor, the shortcoming that this water level is controlled is while being applied in the smaller deep well of some bores, tend to because sensor encounter the borehole wall or kink with cable together with and to make controller that erroneous judgement occur disconnected, finally cause photovoltaic water pump normally to work.Given this, we determine to adopt the method for software control to realize water level control, thereby carry out the on off control of water pump.
Summary of the invention
The object of the invention is to solve in prior art, with level sensor, photovoltaic water pump is carried out to the existing the problems referred to above of on off control, provide a kind of motor working current of utilizing photovoltaic centrifugal water pump to be carried out to the method for on off control.The present invention designs a kind of motor working current of utilizing and photovoltaic centrifugal water pump is carried out to the method for on off control, it is characterized in that: on controller, connect sampling resistor, sampling current of electric, then pass to single-chip microcomputer, single-chip microcomputer judges whether to beat dry by comparative analysis size of current value, the value obtaining when sample circuit be less than setting beat dry numerical value time, the signal that water pump of controller output is shut down, Deng having shut down after one section of set time, the signal of a startup water pump of controller output, attempt starting, if still anhydrous, continue to shut down to wait for, until there is water water pump to work on.Advantage of the present invention is that software water level realtime control is good, failure rate is low, and the water level that can meet photovoltaic water pump is completely controlled requirement.
Below in conjunction with embodiment, the present invention is elaborated,
Embodiment
On controller, connect sampling resistor; sampling current of electric, then passes to single-chip microcomputer, and single-chip microcomputer judges whether to beat dry by comparative analysis size of current value; the value obtaining when sample circuit be less than setting beat dry numerical value time; the signal that water pump of controller output is shut down, waits and has shut down after one section of set time, the signal of a startup water pump of controller output; attempt starting; if still anhydrous, continue to shut down to wait for, until there is water water pump to work on.
By experiment, obtain the test data of centrifugal pump:
| Parameter situation classification | The situation that has water | Beat dry situation |
| Voltage | 48V | 48V |
| Electric current | 6.5A | 1.3A |
| Frequency | 500(HZ) | 680(HZ) |
The laboratory data that obtains screw pump is as follows:
| Parameter situation classification | The situation that has water | Beat dry situation |
| Voltage | 24V | 24V |
| Electric current | 1.3A | 1.2A |
| Frequency | 410(HZ) | 400(HZ) |
From above data, we can find out, centrifugal pump electric current changes dry in the situation that obviously having water and beat, so we can realize judging whether to beat and do by detecting the variation of electric current.The electric current and voltage of screw pump and frequency are not clearly having water and playing dry in the situation that variation, therefore can not adopt software to control water level.
Claims (1)
1. one kind is utilized motor working current photovoltaic centrifugal water pump to be carried out to the method for on off control, it is characterized in that: on controller, connect sampling resistor, sampling current of electric, then pass to single-chip microcomputer, single-chip microcomputer judges whether to beat dry by comparative analysis size of current value, the value obtaining when sample circuit be less than setting beat dry numerical value time, the signal that water pump of controller output is shut down, Deng having shut down after one section of set time, the signal of a startup water pump of controller output, attempt starting, if still anhydrous, continue to shut down to wait for, until there is water water pump to work on, described photovoltaic centrifugal water pump operating voltage when having water is 48V, operating current is 6.5A, frequency of okperation is 500HZ, the operating voltage that described photovoltaic centrifugal water pump is beaten while doing is 48V, operating current is 1.3A, frequency of okperation is 680HZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010114275.XA CN102168680B (en) | 2010-02-25 | 2010-02-25 | Method for controlling photovoltaic centrifugal water pump to start and stop by using working current of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010114275.XA CN102168680B (en) | 2010-02-25 | 2010-02-25 | Method for controlling photovoltaic centrifugal water pump to start and stop by using working current of motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102168680A CN102168680A (en) | 2011-08-31 |
| CN102168680B true CN102168680B (en) | 2014-08-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010114275.XA Expired - Fee Related CN102168680B (en) | 2010-02-25 | 2010-02-25 | Method for controlling photovoltaic centrifugal water pump to start and stop by using working current of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102168680B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503013B (en) * | 2020-05-09 | 2020-10-30 | 蜂巢动力系统(江苏)有限公司 | Dry-running protection method for electronic water pump |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3953777A (en) * | 1973-02-12 | 1976-04-27 | Delta-X Corporation | Control circuit for shutting off the electrical power to a liquid well pump |
| CN2305016Y (en) * | 1997-03-06 | 1999-01-20 | 深圳众大实业股份有限公司 | D/A convertor for pump driven by photocell |
-
2010
- 2010-02-25 CN CN201010114275.XA patent/CN102168680B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3953777A (en) * | 1973-02-12 | 1976-04-27 | Delta-X Corporation | Control circuit for shutting off the electrical power to a liquid well pump |
| CN2305016Y (en) * | 1997-03-06 | 1999-01-20 | 深圳众大实业股份有限公司 | D/A convertor for pump driven by photocell |
Non-Patent Citations (6)
| Title |
|---|
| > * |
| < * |
| .2007,8、39-41. * |
| 刘苏龙.直流无刷电机光伏水泵系统控制研究.< * |
| 刘苏龙.直流无刷电机光伏水泵系统控制研究.<<南京理工大学学位论文>>.2007,8、39-41. |
| 南京理工大学学位论文> * |
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| Publication number | Publication date |
|---|---|
| CN102168680A (en) | 2011-08-31 |
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Address after: 201517 Shanghai city Jinshan District Lu Zhen Zhu Lu Road No. 6750 Patentee after: Shanghai jubilon Polytron Technologies Inc Address before: 201517 Shanghai city Jinshan District Lu Zhen Zhu Lu Road No. 6750 Patentee before: Shanghai Xilong Solar Energy Technology Co., Ltd. |
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Granted publication date: 20140813 Termination date: 20200225 |
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