CN105743394A - Pulse modulation method for driving parallel water pump motors - Google Patents
Pulse modulation method for driving parallel water pump motors Download PDFInfo
- Publication number
- CN105743394A CN105743394A CN201610075257.2A CN201610075257A CN105743394A CN 105743394 A CN105743394 A CN 105743394A CN 201610075257 A CN201610075257 A CN 201610075257A CN 105743394 A CN105743394 A CN 105743394A
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- Prior art keywords
- phasor
- pump motor
- voltage
- water pump
- component
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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
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The invention discloses a pulse modulation method for driving parallel water pump motors. A voltage component corresponding to each water pump motor is calculated by a phasor sum minimization algorithm to obtain included angles between the voltage components; and the phasor sum is minimized, so that a DC pulsating current is greatly reduced; the total capacitance value of buffer capacitors on a DC bus is reduced; the cost is reduced; the heating loss of the buffer capacitors is reduced; the operating efficiency of the whole system is improved; and collaborative speed regulation control can be carried out on a plurality of water pump motors.
Description
Technical field
The present invention relates to pulse modulation method, be specifically related to a kind of pulse modulation method driving parallel water pump motor.
Background technology
Way of supplying water traditionally has three kinds: the first directly supplies water for pump group；The second is water tower, high-level tank water；The third is airpressured pitcher；And for a long time, people are devoted to the exploration of more superior water system, frequency conversion speed adjusting pump system is one of this idealized system.
But the nowadays current direct way of supplying water of pump group is multiple ontology constant pressure water supply system, a programmable controller is adopted to control a pump speed control, other pump then constant-speed operation；But under most of operating conditions (such as flow little in), the overall operation efficiency of system is very low, causes waste；Even if when indivedual many pumps speed governing operation, owing to adopting universal frequency converter technology, it is impossible to carrying out the modulation synchronization of general multifrequency device and run to realize efficiency optimization, cause needing on dc bus to install too much buffering electric capacity, heating loss is big, and cost is high.
Summary of the invention
The invention aims to multiple stage pump motor carries out collaborative speed regulating control, reduce the harmonic current injecting common DC bus, reduce a kind of pulse modulation method driving parallel water pump motor of the heating loss that direct current bus bar is held.
The present invention is achieved through the following technical solutions: a kind of pulse modulation method driving parallel water pump motor, the control module of pump motor speed-adjusting and control system is by DC bus powered, dc bus arranges some buffering electric capacity, control module and connect k pump motor, k is be more than or equal to 2, pump motor is ac motor, and the number of phases of pump motor can be the same or different, and step is as follows:
A) control module and k platform pump motor is carried out phasor control, set the stator voltage component of each pump motor, obtain the phasor of k component of voltage；
B) control module utilize phasor and minimize algorithm and online calculate the angle between each component of voltage phasor；
C) control module and the component of voltage of each pump motor will be carried out phasor control so that the phasor of k phasor and be 0, reduce DC pulse electric current.
In described step B, control module utilize phasor and minimize angle that algorithm calculates between each component of voltage phasor can calculated off line；Described pump motor speed-adjusting and control system can realize plural parallel stage by dc bus and run.
The present invention by utilizing phasor and minimizing algorithm and calculate the angle between each component of voltage by component of voltage corresponding for each pump motor, make phasor and minimize, greatly reduce DC pulse electric current, the total capacitance making the buffering electric capacity on dc bus reduces, reduce cost, and the heating loss cushioning electric capacity reduces so that the operational efficiency of whole system improves, multiple stage pump motor can be carried out collaborative speed regulating control.
The invention have benefit that: 1) multiple stage pump motor can be carried out collaborative speed regulating control, improve the operational efficiency of whole system；2) the total capacitance making the buffering electric capacity on dc bus reduces, and causes that the buffering electric capacity quantity of needs reduces, and installation cost reduces；3) heating loss making buffering electric capacity being reduced, the operational efficiency of system promotes.
Accompanying drawing explanation
Fig. 1 is the frame diagram of pump motor speed-adjusting and control system of the present invention.
Fig. 2 is the phasor diagram of pump motor component of voltage.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the invention will be further described.
See Fig. 1 to Fig. 2, a kind of pulse modulation method driving parallel water pump motor, the control module of pump motor speed-adjusting and control system is by DC bus powered, dc bus arranges some buffering electric capacity, controlling module and connect k pump motor, k is be more than or equal to 2, and each pump motor is ac motor, the pump motor number of phases can be identical, for instance is all three phase electric machine；Each water pump step number of motor phases can also be different, for instance have three phase electric machine and two-phase induction motor；Step is as follows:
A) control module and k platform pump motor is carried out phasor control, set the stator voltage component of each pump motor, obtain the phasor of k component of voltage；
B) control module utilize phasor and minimize algorithm and online calculate the angle between each component of voltage phasor；
C) control module and the component of voltage of each pump motor will be carried out phasor control so that the phasor of k phasor and be 0, reduce DC pulse electric current.
In described step B, control module utilize phasor and minimize angle that algorithm calculates between each component of voltage phasor can calculated off line；Described pump motor speed-adjusting and control system can realize plural parallel stage by dc bus and run.
In present embodiment, controlling module and connect k pump motor, each pump motor is ac motor, and k is less than or equal to 10.
In present embodiment, if k pump motor is carried out phasor control, then component of voltage respectively v1, v2, v3, v4 of corresponding pump motor ... vk；These component of voltages need the mould meeting phasor sum in phase quantity space minimum；If the mould of each phasor is equal, namely the kind of each pump motor, power are the same with electric pressure, then the angle between each component of voltage, just for 360/k degree, therefore just can make the phasor of k phasor and is 0.
In present embodiment, if the mould of each phasor is unequal, then adopt phasor and minimize algorithm, online or calculated off line draws the angle between each component of voltage, total total k component of voltage just has k angle just to have k phasor, control module and control the angle between each component of voltage by internal processes, make the phasor of k phasor and minimum, even for 0, thus can guarantee that DC pulse electric current is substantially reduced, so that total capacitance of the buffering electric capacity on dc bus reduces, reduce cost, and the heating loss cushioning electric capacity reduces, the operational efficiency making whole system improves, multiple stage pump motor can be carried out collaborative speed regulating control simultaneously, realize efficiency optimization to run.
In present embodiment, this method is applicable not only to the series-parallel governing system of multiple stage pump, is also applied for the series-parallel governing system of many Fans；Many group multiple stage pump/fan parallel-connections can also be suitable for and run governing system, if 3 groups of pump public direct-flow bus wire systems, first group is 3 2kw pumps, second group is 3 5kw pumps, 3rd group is 3 10kw pumps, adopting Centralized Controller, 3 groups just can independently realize speed regulating control, then can be achieved with the patent of upper level and control.
Protection scope of the present invention includes but not limited to embodiment of above, and protection scope of the present invention is as the criterion with claims, and any replacement that those skilled in the art will find apparent that this technology is made, deformation, improvement each fall within protection scope of the present invention.
Claims (3)
1. the pulse modulation method driving parallel water pump motor, the control module of pump motor speed-adjusting and control system, by DC bus powered, dc bus arranges some buffering electric capacity, controls module and connects k pump motor, k is be more than or equal to 2, it is characterised in that step is as follows:
A) control module and k platform pump motor is carried out phasor control, set the stator voltage component of each pump motor, obtain the phasor of k component of voltage；
B) control module utilize phasor and minimize algorithm and online calculate the angle between each component of voltage phasor；
C) control module and the component of voltage of each pump motor will be carried out phasor control so that the phasor of k phasor and be 0, reduce DC pulse electric current.
2. a kind of pulse modulation method driving parallel water pump motor according to claim 1, it is characterised in that: in described step B, control module utilize phasor and minimize angle that algorithm calculates between each component of voltage phasor can calculated off line.
3. a kind of pulse modulation method driving parallel water pump motor according to claim 1, it is characterised in that: described pump motor speed-adjusting and control system can realize plural parallel stage by dc bus and run.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075257.2A CN105743394B (en) | 2016-02-03 | 2016-02-03 | A kind of pulse modulation method driving parallel water pump motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075257.2A CN105743394B (en) | 2016-02-03 | 2016-02-03 | A kind of pulse modulation method driving parallel water pump motor |
Publications (2)
| Publication Number | Publication Date |
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| CN105743394A true CN105743394A (en) | 2016-07-06 |
| CN105743394B CN105743394B (en) | 2018-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610075257.2A Active CN105743394B (en) | 2016-02-03 | 2016-02-03 | A kind of pulse modulation method driving parallel water pump motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117279283A (en) * | 2023-11-17 | 2023-12-22 | 广州市安立发智能技术有限公司 | Energy-saving environment-friendly intelligent variable-frequency control cabinet for water pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645689A (en) * | 2008-08-04 | 2010-02-10 | 上海电驱动有限公司 | Motor control system for oil extractor in oil field |
| CN101707463A (en) * | 2009-11-10 | 2010-05-12 | 中国人民解放军海军工程大学 | Parallel vector control system of induction motor |
| US20110080000A1 (en) * | 2008-06-09 | 2011-04-07 | Rolls-Royce Plc | Synchronous electrical machine |
| CN102878092A (en) * | 2012-10-16 | 2013-01-16 | 章礼道 | Novel energy-saving and speed-regulation electric water feeding pump system |
-
2016
- 2016-02-03 CN CN201610075257.2A patent/CN105743394B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110080000A1 (en) * | 2008-06-09 | 2011-04-07 | Rolls-Royce Plc | Synchronous electrical machine |
| CN101645689A (en) * | 2008-08-04 | 2010-02-10 | 上海电驱动有限公司 | Motor control system for oil extractor in oil field |
| CN101707463A (en) * | 2009-11-10 | 2010-05-12 | 中国人民解放军海军工程大学 | Parallel vector control system of induction motor |
| CN102878092A (en) * | 2012-10-16 | 2013-01-16 | 章礼道 | Novel energy-saving and speed-regulation electric water feeding pump system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117279283A (en) * | 2023-11-17 | 2023-12-22 | 广州市安立发智能技术有限公司 | Energy-saving environment-friendly intelligent variable-frequency control cabinet for water pump |
| CN117279283B (en) * | 2023-11-17 | 2024-01-30 | 广州市安立发智能技术有限公司 | Energy-saving environment-friendly intelligent variable-frequency control cabinet for water pump |
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| CN105743394B (en) | 2018-11-20 |
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Denomination of invention: A Pulse Modulation Method for Driving Parallel Water Pump Motors Effective date of registration: 20230825 Granted publication date: 20181120 Pledgee: Ningbo Zhenhai Rural Commercial Bank Co.,Ltd. Pledgor: NINGBO JIURONG ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Registration number: Y2023980053821 |
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