CN105515482A - Pulse modulation method for driving water pump motors connected in parallel - Google Patents
Pulse modulation method for driving water pump motors connected in parallel Download PDFInfo
- Publication number
- CN105515482A CN105515482A CN201610075278.4A CN201610075278A CN105515482A CN 105515482 A CN105515482 A CN 105515482A CN 201610075278 A CN201610075278 A CN 201610075278A CN 105515482 A CN105515482 A CN 105515482A
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- vector
- pump motor
- water pump
- control module
- excitation current
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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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
-
- 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 water pump motors connected in parallel. The method comprises the steps that included angles of every two excitation current component vectors are calculated through a vector-sum minimized algorithm according to the excitation current component vectors corresponding to the water pump motors to enable the vector sum to be minimized, a direct-current pulsating current is greatly reduced, the total capacitance value of snubber capacitors on a direct-current busbar is decreased, the cost is reduced, the heat loss of the snubber capacitors is reduced, the operating efficiency of a whole system is improved, and synergistic speed-regulation control over the multiple water pump motors can be achieved.
Description
Technical field
The present invention relates to pulse modulation method, be specifically related to the 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 condition (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, cannot carry out general multifrequency device modulation synchronously implementation efficiency optimizing operation, cause DC bus needing install too much buffer capacitor, heating loss is large, and cost is high.
Summary of the invention
The present invention seeks to carry out collaborative speed regulating control to multiple stage pump motor, reducing the harmonic current injecting common DC bus, reducing the pulse modulation method of the 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: the 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 is arranged some buffer capacitors, control module connects k pump motor, k is more than or equal to 2, pump motor is alternating current motor, and the number of phases of pump motor can be the same or different, and step is as follows:
A) control module carries out vector control to k platform pump motor, sets the excitation current component of each pump motor, obtains the vector of k excitation current component;
B) control module utilizes vector minimization algorithm to online calculate angle between each excitation current component vector;
C) control module carries out vector control by the exciting current of each pump motor, and the vector making k vector is 0, reduces DC pulse electric current.
In described step B, control module utilizes vector minimization algorithm to calculate angle between each excitation current component vector can calculated off-line; Described pump motor speed-adjusting and control system realizes plural parallel stage by DC bus and runs.
The present invention calculates angle between each excitation current component by excitation current component vector corresponding for each pump motor being utilized vector minimization algorithm, vector is minimized, greatly reduce DC pulse electric current, total capacitance of the buffer capacitor on DC bus is reduced, reduce cost, and the heating loss of buffer capacitor reduces, and makes the operational efficiency of whole system improve, can carry out collaborative speed regulating control to multiple stage pump motor.
Usefulness of the present invention is: 1) can carry out collaborative speed regulating control to multiple stage pump motor, improve the operational efficiency of whole system; 2) make total capacitance of the buffer capacitor on DC bus reduce, cause the buffer capacitor quantity of needs to reduce, installation cost reduces; 3) will the heating loss of buffer capacitor be reduced, running 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 polar plot of pump motor excitation current component.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
See Fig. 1 to Fig. 2, drive the pulse modulation method of parallel water pump motor, the control module of pump motor speed-adjusting and control system is by DC bus powered, DC bus is arranged some buffer capacitors, control module connects k pump motor, and k is more than or equal to 2, and each pump motor is alternating current motor, the pump motor number of phases can be identical, such as, be all three phase electric machine; Each water pump step number of motor phases also can be different, such as, have three phase electric machine and two-phase induction motor; Step is as follows:
A) control module carries out vector control to k platform pump motor, sets the excitation current component of each pump motor, obtains the vector of k excitation current component;
B) control module utilizes vector minimization algorithm to online calculate angle between each excitation current component vector;
C) control module carries out vector control by the exciting current of each pump motor, and the vector making k vector is 0, reduces DC pulse electric current.
In described step B, control module utilizes vector minimization algorithm to calculate angle between each excitation current component vector can calculated off-line; Described pump motor speed-adjusting and control system realizes plural parallel stage by DC bus and runs.
In present embodiment, control module connects k pump motor, and each pump motor is alternating current motor, and k is less than or equal to 10.
In present embodiment, if carry out vector control to k pump motor, then the excitation current component of corresponding pump motor is respectively Id1, Id2, Id3, Id4 ... Idk; These excitation current components need the mould meeting vector in vector space minimum; If the mould of each vector is equal, namely the kind of each pump motor, power are the same with electric pressure, and the angle so between each excitation current component is just 360/k degree, and the vector of k vector therefore just can be made to be 0.
In present embodiment, if the mould of each vector is unequal, then adopt vector minimization algorithm, online or calculated off-line draws the angle between each excitation current component, total total k excitation current component just has k angle just to have k vector, control module controls the angle between each excitation current vector by internal processes, make the vector of k vector minimum, be even 0, so just can ensure that DC pulse electric current reduces greatly, total capacitance of the buffer capacitor on DC bus is reduced, reduce cost, and the heating loss of buffer capacitor reduces, the operational efficiency of whole system is improved, collaborative speed regulating control can be carried out to multiple stage pump motor, implementation efficiency optimizing operation.
In present embodiment, this method is not only applicable to the governing system of multiple stage pump string-parallel connection, is applicable to the governing system of multiple stage blower fan string-parallel connection yet; 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, adopt Centralized Controller, 3 groups just independently can realize speed regulating control, and the patent that then just can realize upper level controls.
Protection scope of the present invention includes but not limited to above execution mode, 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, distortion, improvement made this technology all falls into protection scope of the present invention.
Claims (3)
1. drive the pulse modulation method of parallel water pump motor, the control module of pump motor speed-adjusting and control system, by DC bus powered, DC bus is arranged some buffer capacitors, and control module connects k pump motor, k is more than or equal to 2, it is characterized in that step is as follows:
A) control module carries out vector control to k platform pump motor, sets the excitation current component of each pump motor, obtains the vector of k excitation current component;
B) control module utilizes vector minimization algorithm to online calculate angle between each excitation current component vector;
C) control module carries out vector control by the exciting current of each pump motor, and the vector making k vector is 0, reduces DC pulse electric current.
2. the pulse modulation method of driving parallel water pump motor according to claim 1, is characterized in that: in described step B, and the angle that control module utilizes vector minimization algorithm to calculate between each excitation current component vector can calculated off-line.
3. the pulse modulation method of driving parallel water pump motor according to claim 1, is characterized in that: described pump motor speed-adjusting and control system realizes plural parallel stage by DC bus and runs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075278.4A CN105515482B (en) | 2016-02-03 | 2016-02-03 | Drive the pulse modulation method of parallel water pump motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610075278.4A CN105515482B (en) | 2016-02-03 | 2016-02-03 | Drive the pulse modulation method of parallel water pump motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105515482A true CN105515482A (en) | 2016-04-20 |
| CN105515482B CN105515482B (en) | 2018-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610075278.4A Active CN105515482B (en) | 2016-02-03 | 2016-02-03 | Drive the pulse modulation method of parallel water pump motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026798A (en) * | 2016-07-14 | 2016-10-12 | 上海金脉电子科技有限公司 | Automobile-used water pump motor controller |
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 CN201610075278.4A patent/CN105515482B/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 |
|---|---|---|---|---|
| CN106026798A (en) * | 2016-07-14 | 2016-10-12 | 上海金脉电子科技有限公司 | Automobile-used water pump motor controller |
| CN106026798B (en) * | 2016-07-14 | 2018-12-14 | 上海金脉电子科技有限公司 | Vehicle water pump electric machine controller |
Also Published As
| Publication number | Publication date |
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| CN105515482B (en) | 2018-10-23 |
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Denomination of invention: Pulse modulation method for driving parallel water pump motors Effective date of registration: 20230825 Granted publication date: 20181023 Pledgee: Ningbo Zhenhai Rural Commercial Bank Co.,Ltd. Pledgor: NINGBO JIURONG ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Registration number: Y2023980053821 |