CN110165964B - Intelligent control method and control device for alternating-current submersible pump - Google Patents
Intelligent control method and control device for alternating-current submersible pump Download PDFInfo
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- CN110165964B CN110165964B CN201910497238.2A CN201910497238A CN110165964B CN 110165964 B CN110165964 B CN 110165964B CN 201910497238 A CN201910497238 A CN 201910497238A CN 110165964 B CN110165964 B CN 110165964B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
Abstract
The invention discloses an intelligent control method and a control device of an alternating current submersible pump, which comprise the following steps: collecting and calibrating under standard voltage to obtain multiple groups of water-deficient current theoretical values B and overload current values D of the motor; collecting real-time voltage loaded on a motor to obtain a real-time voltage value A and obtain a theoretical value of water-deficient current under the real-time voltage value A; comparing the real-time current value C with a theoretical water shortage current value B and an overload current value D; if the real-time current value C is smaller than the water shortage current theoretical value B, the motor is judged to be in a water shortage state; and if the real-time current value C is larger than the overload current value D, judging that the motor is in an overload state, and at the moment, enabling the motor to enter a forward and reverse rotation state or a forward and reverse recovery state. The invention can detect the real-time current and the real-time voltage of the motor in the submersible pump, and can carry out water shortage judgment, overload judgment, positive and negative rotation and positive rotation recovery judgment on the motor according to the detected real-time current value and real-time voltage value.
Description
Technical Field
The invention relates to the technical field of submersible pump control, in particular to an intelligent control method and an intelligent control device for an alternating-current submersible pump.
Background
The alternating current submersible pump has the advantages that due to factors of use environments, the voltage variation is large, fluctuation exists according to stability of a power grid, voltage loss is caused due to different lengths of used cable wires, and the low voltage of actual water pump operation is lower than or equal to power supply voltage. The current changes along with the voltage change, and the current change causes many intelligent judgment problems, wherein the phenomenon of water shortage is serious. The situation that water shortage possibly occurs comprises normal water use of a user, the voltage is relatively high, but the set water shortage threshold B is in the state, water shortage can be mistakenly caused, and the motor is stopped; in the second situation, a user uses water normally, the voltage is relatively low, the B value under the condition is high, the motor runs continuously and cannot be shut down, and if the temperature protection embedded in the motor is not acted, the motor leaks electricity or burns out the motor; the external hardware water level sensor of the third condition detects, because there is undulant in service environment water level height in the reality, can lead to the motor to frequently start when water level sensor floats from top to bottom, and start and all can have the heavy current, influence the motor life-span, damage the motor under the severe condition.
Disclosure of Invention
The invention aims to provide an intelligent control method and a control device for an alternating-current submersible pump. The invention can detect the real-time current and the real-time voltage of the motor in the submersible pump, and can carry out water shortage judgment, overload judgment, positive and negative rotation and positive rotation recovery judgment on the motor according to the detected real-time current value and real-time voltage value, thereby protecting the motor and avoiding the motor from being burnt.
The technical scheme of the invention is as follows: an intelligent control method of an alternating current submersible pump comprises the following steps:
s1, acquiring and calibrating a plurality of groups of water-deficient current theoretical values B and overload current values D of the motor under standard voltage, and forming a lookup table by the plurality of groups of water-deficient current theoretical values B;
s2, collecting the real-time voltage loaded on the motor to obtain a real-time voltage value A, obtaining a theoretical value B of water-deficient current under the real-time voltage value A by searching a lookup table, and collecting and obtaining a real-time current value C of the motor operation;
s3, comparing the real-time current value C with the water shortage current theoretical value B and the overload current D, and judging the running state of the motor according to the comparison result;
s4, if the real-time current value C is smaller than the water shortage current theoretical value B, the motor is judged to be in a water shortage state; and if the real-time current value C is larger than the overload current value D, judging that the motor is in an overload state, and at the moment, enabling the motor to enter a forward and reverse rotation state or a forward and reverse recovery state.
In the intelligent control method of the alternating current submersible pump, the real-time voltage loaded on the motor is collected through the voltage transformer, and the collected real-time voltage value A is fed back to the single chip microcomputer.
In the intelligent control method of the alternating current submersible pump, the real-time current on the motor is collected through the current transformer, and the collected real-time current value C is fed back to the single chip microcomputer.
In the foregoing intelligent control method for an ac submersible pump, the single chip microcomputer is provided with a parameter packet, and the parameter packet includes: the water-saving control method comprises the following steps of obtaining a real-time voltage value A, a water-shortage current theoretical value B, a motor operation real-time current value C, an overload current value D, overload forward rotation time E, overload recovery time T, overload reverse rotation time F, forward and reverse rotation allowable operation times N, water-shortage time M, overload time P, a water-shortage time threshold H and an overload time threshold J.
In the intelligent control method of the alternating current submersible pump, the water shortage state of the motor is judged by acquiring a real-time current value C and a real-time voltage value A of the current motor operation through a current transformer and a voltage transformer;
when the current acquired real-time motor operation current value C is smaller than the theoretical water shortage current value B under the real-time voltage value A, the water shortage time M is larger than the set water shortage time threshold value H, the motor enters water shortage, the motor enters normal operation again after I minutes, and if the motor still lacks water, the motor continuously waits;
if the duration time M is less than the set water shortage time threshold value H, the motor continuously operates, if voltage change occurs in the process, the theoretical value B of the water shortage current can be refreshed again, and judgment is carried out again, so that the water shortage state of the motor can be accurately judged.
In the intelligent control method of the alternating current submersible pump, the motor overload state is judged by acquiring a real-time current value C of the current motor operation through a current transformer, wherein the real-time current value C is larger than an overload current value D, if the overload time P is continuously detected to be larger than a set overload time threshold J, the motor enters a forward and reverse rotation state, the real-time current value C is continuously larger than the overload current value D within the forward rotation time E, the motor is stopped for waiting, the motor enters an overload recovery state, after the overload recovery time T, the motor enters reverse rotation, after the overload reverse rotation time F, the motor is stopped for waiting time T and then is rotated forward again for a plurality of times, and when the set forward and reverse rotation times N are exceeded, the motor is stopped for alarming, and; if the current transformer detects that the real-time current value C is smaller than the overload current value D within the forward rotation time E, the recovery is determined, and the motor operates normally.
A control device of an alternating current submersible pump comprises a voltage transformer, a current transformer, a single chip microcomputer, a driving power device, an alarm device, the submersible pump and an external power supply;
the voltage transformer is used for detecting real-time voltage loaded on a motor in the submersible pump;
the current transformer is used for detecting the real-time current passing through a motor in the submersible pump;
the single chip microcomputer is connected with the current transformer and the voltage transformer through weak current signals and is used for receiving a real-time current value C of motor operation detected by the current transformer, receiving a real-time voltage value A of motor operation detected by the voltage transformer and setting related parameters in a parameter packet;
the external power supply, the power driving device and the motor in the submersible pump are connected through cables allowing large current to pass through, and the power driving device is used for controlling the submersible pump to work;
the single chip microcomputer and the power driving device are controlled through weak current signals, the power driving device receives a control instruction sent by the single chip microcomputer and controls a motor in the submersible pump according to the received control instruction of the single chip microcomputer;
and the alarm device is connected with the singlechip and used for giving an alarm.
Compared with the prior art, the invention has the following advantages:
1. the invention adopts the hardware matching mode of the current transformer and the voltage transformer to judge the submersible pump under a plurality of states, including water shortage determination, overload determination, positive and negative rotation and positive rotation recovery determination.
After the current voltage value is read in the set of control system, the parameters are assigned according to different voltages. Because the service environment of immersible pump or the voltage loss that leads to using the cable, it is not stable value to lead to voltage, the electric current can change along with the change of voltage, under certain circumstances, the electric current change is less than the default value, can lead to the water shortage can't be judged, the operation that lasts can lead to motor high temperature, burn out the condition of motor, adopt current transformer and voltage transformer sharing to solve under different voltages, the condition that the water shortage that the electric current difference leads to can't be judged, the condition that the motor that has solved on the market because increase water level sensor leads to frequently starts to damage the click and can't just judge the water shortage to low water level, high in applicability.
2. The current transformer can accurately judge the theoretical value of the water shortage value B under the current voltage by matching with the voltage transformer in a signal checking mode, so that the normal water shortage of the submersible pump is ensured.
Drawings
FIG. 1 is a control flow diagram of the control method of the present invention;
fig. 2 is a control schematic of the present invention.
1-a voltage transformer; 2-a current transformer; 3, a singlechip; 4-driving a power device; 5-an alarm device; 6-a submersible pump; 7-external power supply.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example (b): an intelligent control method of an alternating current submersible pump is shown in fig. 1, and comprises the following steps:
s1, acquiring and calibrating a plurality of groups of water-deficient current theoretical values B and overload current values D of the motor under standard voltage, and forming a lookup table by the plurality of groups of water-deficient current theoretical values B; the current transformer is matched with the voltage transformer, the theoretical value of the water shortage value B under the current voltage can be accurately judged in a communication checking mode, and therefore the normal water shortage of the submersible pump is guaranteed.
S2, collecting the real-time voltage loaded on the motor to obtain a real-time voltage value A, obtaining a theoretical value B of water-deficient current under the real-time voltage value A by searching a lookup table, and collecting and obtaining a real-time current value C of the motor operation;
the method for collecting the real-time voltage on the motor comprises the steps of collecting the real-time voltage loaded on the motor through a voltage transformer, and feeding back a collected real-time voltage value A to a single chip microcomputer;
the method for collecting the real-time current on the motor is characterized in that the real-time current of the motor is collected through a current transformer, and the collected real-time current value C is fed back to the single chip microcomputer;
the single chip microcomputer is provided with a parameter packet, and the parameter packet comprises: the water-saving control method comprises the following steps of obtaining a real-time voltage value A, a water-shortage current theoretical value B, a motor operation real-time current value C, an overload current value D, overload forward rotation time E, overload recovery time T, overload reverse rotation time F, forward and reverse rotation allowable operation times N, water-shortage time M, overload time P, a water-shortage time threshold H and an overload time threshold J.
S3, comparing the real-time current value C with the water shortage current theoretical value B and the overload current D, and judging the running state of the motor according to the comparison result;
s4, if the real-time current value C is smaller than the water shortage current theoretical value B, the motor is judged to be in a water shortage state; and if the real-time current value C is larger than the overload current value D, judging that the motor is in an overload state, and at the moment, enabling the motor to enter a forward and reverse rotation state or a forward and reverse recovery state.
The method for judging the water shortage state of the motor comprises the steps of obtaining a real-time current value C and a real-time voltage value A of the current motor operation through a current transformer and a voltage transformer;
when the current acquired real-time motor operation current value C is smaller than the theoretical water shortage current value B under the real-time voltage value A, the water shortage time M is larger than the set water shortage time threshold value H, the motor enters water shortage, the motor enters normal operation again after I minutes, and if the motor still lacks water, the motor continuously waits; for example, if the water shortage time M is greater than the set water shortage time threshold H, the motor enters water shortage, and under the condition of no monitoring, the motor will enter normal operation again after 30 minutes, and if the water shortage still exists, the motor continues to wait.
If the duration time M is less than the set water shortage time threshold value H, the motor continuously operates, if voltage change occurs in the process, the theoretical value B of the water shortage current can be refreshed again, and judgment is carried out again, so that the water shortage state of the motor can be accurately judged.
The method for judging the overload state of the motor comprises the steps that a real-time current value C of the current motor operation is obtained through a current transformer, the real-time current value C is larger than an overload current value D, if the overload time P is continuously detected to be larger than a set overload time threshold value J (for example: OverCurrent (TMTH)), the motor enters a forward and reverse rotation state, the real-time current value C is continuously larger than the overload current value D within the forward rotation time E, the motor is stopped for waiting, the motor is in an overload recovery state, the motor enters reverse rotation after the overload recovery time T, the motor is stopped for waiting for the time T and then rotates forward again after the overload reverse rotation time F, the motor is stopped for a plurality of times, and when the set forward and reverse rotation times N are exceeded; if the current transformer detects that the real-time current value C is smaller than the overload current value D within the forward rotation time E, the recovery is determined, and the motor operates normally.
When the submersible pump motor is controlled, the system is initialized firstly, after the initialization is finished, the real-time voltage value A and the real-time current value C loaded at two ends of the submersible pump motor at present are read, then parameters in a parameter packet are loaded, the real-time current value C is compared with the water shortage current theoretical value B and the overload current value D, and the running state of the motor is judged according to the comparison result. If the real-time current value C is smaller than the water shortage current theoretical value B, the motor is judged to be in a water shortage state; and if the real-time current value C is larger than the overload current value D, judging that the motor is in an overload state, and at the moment, enabling the motor to enter a forward and reverse rotation state or a forward and reverse recovery state.
The invention adopts the hardware matching mode of the current transformer and the voltage transformer to judge the submersible pump under a plurality of states, including water shortage determination, overload determination, positive and negative rotation and positive rotation recovery determination.
After the current voltage value is read in the set of control system, the parameters are assigned according to different voltages. Because the service environment of immersible pump or the voltage loss that leads to using the cable, it is not stable value to lead to voltage, the electric current can change along with the change of voltage, under certain circumstances, the electric current change is less than the default value, can lead to the water shortage can't be judged, the operation that lasts can lead to motor high temperature, burn out the condition of motor, adopt current transformer and voltage transformer sharing to solve under different voltages, the condition that the water shortage that the electric current difference leads to can't be judged, the condition that the motor that has solved on the market because increase water level sensor leads to frequently starts to damage the click and can't just judge the water shortage to low water level, high in applicability.
A control device of an alternating current submersible pump is shown in figure 2 and comprises a voltage transformer 1, a current transformer 2, a singlechip 3, a driving power device 4, an alarm device 5, a submersible pump 6 and an external power supply 7;
the voltage transformer 1 is used for detecting real-time voltage loaded on a motor in the submersible pump 6;
the current transformer 2 is used for detecting the real-time current passing through a motor in the submersible pump 6;
the single chip microcomputer 3 is connected with the current transformer 2 and the voltage transformer 1 through weak current signals and is used for receiving a real-time current value C of motor operation detected by the current transformer 2, receiving a real-time voltage value A of motor operation detected by the voltage transformer 1 and setting related parameters in a parameter packet;
the external power supply 7, the power driving device 4 and the motor in the submersible pump 6 are connected through cables allowing large current to pass through, and the power driving device 4 is used for controlling the submersible pump 6 to work;
the single chip microcomputer 3 and the power driving device 4 are controlled through weak current signals, the power driving device 4 receives a control instruction sent by the single chip microcomputer 3, and controls a motor in the submersible pump 6 according to the received control instruction of the single chip microcomputer 3;
and the alarm device 5 is connected with the singlechip 3 and used for giving an alarm.
Claims (7)
1. An intelligent control method of an alternating current submersible pump is characterized in that: the method comprises the following steps:
s1, acquiring and calibrating a plurality of groups of water-deficient current theoretical values B and overload current values D of the motor under standard voltage, and forming a lookup table by the plurality of groups of water-deficient current theoretical values B;
s2, collecting the real-time voltage loaded on the motor to obtain a real-time voltage value A, obtaining a theoretical value B of water-deficient current under the real-time voltage value A by searching a lookup table, and collecting and obtaining a real-time current value C of the motor operation;
s3, comparing the real-time current value C with the water shortage current theoretical value B and the overload current value D, and judging the running state of the motor according to the comparison result;
s4, if the real-time current value C is smaller than the water shortage current theoretical value B, the motor is judged to be in a water shortage state; and if the real-time current value C is larger than the overload current value D, judging that the motor is in an overload state, and at the moment, enabling the motor to enter a forward and reverse rotation state or a forward and reverse recovery state.
2. The intelligent control method of the AC submersible pump according to claim 1, wherein: the method for collecting the real-time voltage on the motor comprises the steps of collecting the real-time voltage loaded on the motor through a voltage transformer and feeding back a collected real-time voltage value A to a single chip microcomputer.
3. The intelligent control method of the AC submersible pump according to claim 2, wherein: the method for collecting the real-time current on the motor comprises the steps of collecting the real-time current of the motor through a current transformer and feeding back the collected real-time current value C to a single chip microcomputer.
4. The intelligent control method of the AC submersible pump according to claim 3, wherein: the single chip microcomputer is provided with a parameter packet, and the parameter packet comprises: the water-saving control method comprises the following steps of obtaining a real-time voltage value A, a water-shortage current theoretical value B, a motor operation real-time current value C, an overload current value D, overload forward rotation time E, overload recovery time T, overload reverse rotation time F, forward and reverse rotation allowable operation times N, water-shortage time M, overload time P, a water-shortage time threshold H and an overload time threshold J.
5. The intelligent control method of the AC submersible pump according to claim 4, wherein: the method for judging the water shortage state of the motor comprises the steps of obtaining a real-time current value C and a real-time voltage value A of the current motor operation through a current transformer and a voltage transformer;
when the current acquired real-time motor operation current value C is smaller than the theoretical water shortage current value B under the real-time voltage value A, the water shortage time M is larger than the set water shortage time threshold value H, the motor enters water shortage, the motor enters normal operation again after I minutes, and if the motor still lacks water, the motor continuously waits;
if the duration time M is less than the set water shortage time threshold H, the motor continuously operates, if voltage change occurs in the process, the theoretical value B of the water shortage current is refreshed again, judgment is carried out again, and the water shortage state of the motor is accurately judged.
6. The intelligent control method of the AC submersible pump according to claim 4, wherein: the method for judging whether the motor is in the overload state comprises the steps of obtaining a real-time current value C of the current motor operation through a current transformer, enabling the real-time current value C to be larger than an overload current value D, enabling the motor to enter a forward and reverse rotation state if overload time P is detected to be larger than a set overload time threshold value J continuously, enabling the real-time current value C to be larger than the overload current value D continuously within forward rotation time E, stopping for waiting, enabling the motor to enter the overload recovery state, enabling the motor to enter reverse rotation after the overload recovery time T, enabling the motor to rotate forward again after the halt waiting time T after the overload reverse rotation time F, enabling the motor to continue for multiple times, and enabling the motor to stop for alarming and not to be started; if the current transformer detects that the real-time current value C is smaller than the overload current value D within the forward rotation time E, the recovery is determined, and the motor operates normally.
7. The control device of the alternating current submersible pump according to any one of claims 1 to 6, comprising a voltage transformer (1), a current transformer (2), a single chip microcomputer (3), a driving power device (4), an alarm device (5), the submersible pump (6) and an external power supply (7); the method is characterized in that:
the voltage transformer (1) is used for detecting real-time voltage loaded on a motor in the submersible pump (6);
the current transformer (2) is used for detecting the real-time current passing through a motor in the submersible pump (6);
the single chip microcomputer (3) is connected with the current transformer (2) and the voltage transformer (1) through weak current signals and is used for receiving a real-time current value C of motor operation detected by the current transformer (2), receiving a real-time voltage value A of motor operation detected by the voltage transformer (1) and setting related parameters in a parameter packet;
the external power supply (7), the power driving device (4) and the motor in the submersible pump (6) are connected through cables allowing large current to pass through, and the power driving device (4) is used for controlling the submersible pump (6) to work;
the single chip microcomputer (3) and the power driving device (4) are controlled through weak current signals, the power driving device (4) receives a control instruction sent by the single chip microcomputer (3), and controls a motor in the submersible pump (6) according to the received control instruction of the single chip microcomputer (3);
and the alarm device (5) is connected with the singlechip (3) and is used for giving an alarm.
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| CN110594168A (en) * | 2019-10-11 | 2019-12-20 | 珠海格力电器股份有限公司 | Control method and control device for water pump |
| CN110778527B (en) * | 2019-12-06 | 2020-05-08 | 台州轩辕国际贸易有限公司 | Control method of high-lift submersible pump |
| CN110943435A (en) * | 2019-12-31 | 2020-03-31 | 贵州航天凯山石油仪器有限公司 | Motor output control method for underground direct-reading measuring and adjusting instrument |
| CN111779683B (en) * | 2020-08-08 | 2021-07-23 | 上海新时达电气股份有限公司 | Deep well pump control method and driving device thereof |
| CN112798075A (en) * | 2020-12-23 | 2021-05-14 | 珠海格力电器股份有限公司 | Water level detection method and device for cooling fan and cooling fan |
| JP2022101755A (en) * | 2020-12-25 | 2022-07-07 | アクア株式会社 | Method for inspecting water supply pump |
| CN113890458B (en) * | 2021-09-29 | 2023-07-04 | 广东万和热能科技有限公司 | Motor control method, control circuit, device and gas water heater of water pump |
| CN114593073B (en) * | 2022-03-31 | 2023-09-22 | 苏州优德通力科技有限公司 | Constant-pressure deep well pump system and control method thereof |
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| CN102195557B (en) * | 2010-03-12 | 2013-01-23 | 时代新纪元科技集团有限公司 | Pump motor control method and device |
| CN203081719U (en) * | 2012-12-26 | 2013-07-24 | 山东星源矿山设备集团有限公司 | Intelligent-control submersible pump for mining |
| KR101535009B1 (en) * | 2014-02-06 | 2015-07-24 | 현대자동차주식회사 | Method for judging state of cooling water |
| CN104460582B (en) * | 2014-09-29 | 2017-09-22 | 贵州省水利科学研究院 | A kind of Internet of Things intelligent irrigation fertilising control method and system based on fuzzy control |
| CN104712561B (en) * | 2015-01-22 | 2017-05-31 | 晋州市水泵厂 | A kind of immersible pump water shortage automatic protecting control device and application method |
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