CN201667611U - System for inhibiting higher harmonic interference of frequency converter by compound heat carrier generator control system - Google Patents
System for inhibiting higher harmonic interference of frequency converter by compound heat carrier generator control system Download PDFInfo
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- CN201667611U CN201667611U CN2010201476120U CN201020147612U CN201667611U CN 201667611 U CN201667611 U CN 201667611U CN 2010201476120 U CN2010201476120 U CN 2010201476120U CN 201020147612 U CN201020147612 U CN 201020147612U CN 201667611 U CN201667611 U CN 201667611U
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- power supply
- frequency converter
- current filter
- filter
- heat carrier
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Abstract
The utility model relates to a system for inhibiting higher harmonic interference of a frequency converter by a compound heat carrier generator control system. The system comprises an alternating-current motor (1), a frequency converter (2), a power supply (3), a switch power supply (6), an electronic instrument (8) and a power line, and is characterized in that: the power line between the power supply (3) and the electronic instrument (8) is provided with an isolation transformer (4), an alternating-current filter (5) and a direct-current filter (7); a primary side of the isolation transformer (4) is in lead connection with the power supply (3) and a secondary side of the isolation transformer is in lead connection with the alternating-current filter (5); the alternating-current filter (5) and the direct-current filter (7) are respectively installed at the front and back of the switch power supply (6); and the direct-current filter (7) is arranged at the input side of the electronic instrument (8). The system only takes an affected control power supply into consideration for filtering, thus not only being low in investment cost and easier for implementation, but also more conforming to the actual condition of the site.
Description
(1) technical field
The utility model relates to a kind of inhibition frequency converter high order harmonic component EVAC (Evacuation Network Computer Model).Be mainly used in the little spatial dimension of solution, big-power transducer is specially adapted to HTHP combustion apparatus-composite heat carrier generator product to the interference problem of control system and instrument and meter.The technical field that belongs to rocket-powered composite heat carrier generator technological equipment.
(2) background technology
Along with the development of power electronic technology, frequency converter is used increasingly extensive, and the high order harmonic component that frequency converter produces also can not be ignored the harm that electrical network produces.Comprising:
1, harmonic wave produces contiguous communication system and disturbs, and the lighter produces noise, reduces communication quality, and weight person causes information dropout, makes the communication system can't operate as normal;
2, harmonic wave can cause the misoperation of relaying protection and automatics, and makes the electrical measuring instrument metering inaccurate.Input/output port to frequency converter installs high frequency filter device additional generally speaking, to weaken the frequency converter high order harmonic component to the influence of electrical network, electronic electric equipment on every side.This filter is made up of jumbo inductance coil and electric capacity, when inverter output terminal produces high order harmonic component, through the inductance coil filtration electric current is unlikely on the one hand and produces big sudden change, make the level and smooth change of electric current; Harmonic wave directly inserts the earth through capacitor on the other hand, to reduce the influence to electrical network.
But in actual application, because big-power transducer quantity is many, the quantity of corresponding input high frequency filter is big, the cost height, and the improvement project amount is big; Complete equipment is applied to offshore production platform, and according to 2 district's requirement of explosion proof, every frequency converter is installed in the flame proof cabinet, and the space is extremely limited, and extremely inconvenience is installed.
(3) summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and input cost is low, is easier to implement, and the composite heat carrier generator control system that more meets on-site actual situations suppresses frequency converter high order harmonic component EVAC (Evacuation Network Computer Model).
The purpose of this utility model is achieved in that a kind of composite heat carrier generator control system suppresses frequency converter high order harmonic component EVAC (Evacuation Network Computer Model), comprise alternating current motor, frequency converter, power supply, Switching Power Supply, electronic instruments and power line, power line between described power supply and the electronic instruments is provided with an isolating transformer, one alternating current filter and a direct current filter, described isolating transformer primary side lead-in wire connects power supply, isolating transformer secondary side lead-in wire connects alternating current filter, alternating current filter and DC filter are installed in the front and back of Switching Power Supply respectively, and DC filter is arranged on the electronic instruments input side.
The utility model at first carries out isolation processing by isolating transformer to the single-phase electricity that is subjected to harmonic pollution, and isolating transformer secondary side lead-in wire is through the alternating current filter Filtering Processing then, and further the harmonic carcellation composition is aided with good shielding, grounding measures.
(1) isolates
The isolation of so-called interference signal is meant from circuit keeps apart interference source and the part that is subject to disturb, and makes them that the contact of electricity, magnetic not take place.In the control power-supply system, normally on the power line between power supply and the electronic instruments, isolating transformer is set, directly the interference between insulating power supply and the electronic instruments.
(2) filtering
The effect that filter is set is in order to prevent that the high order harmonic component signal from conducting to power supply with carrier system from frequency converter, to disturb electric power system normally to move.For minimizing is subjected to the influence of the power supply of harmonic pollution to electronic instrument, DC filter can be set at the electronic instruments input side.
(3) shielding
The shielding interference source is to suppress to disturb effective method.Usually frequency converter itself does not allow its electromagnetic interference leak with the iron-clad shielding.Output line shields with steel pipe, during particularly with outside signal controlling frequency converter, require holding wire to lack (being generally in the 20m) as far as possible, and holding wire adopts the twin-core shielding, and separate laying fully with main circuit and control loop, can not be put in same pipe arrangement or the wire casing, also will carry out shielding to the circuit of electromagnetic signal sensitive electronic devices on every side.For making shielding effectively, radome must reliable ground.
(4) ground connection
The important means that ground connection is suppressed noise often and prevented to disturb.Good earthing mode can suppress the coupling of internal noise to a great extent, prevents the intrusion of external disturbance, improves the antijamming capability of system.Frequency converter uses special-purpose earth connection, and earth connection is tubbiness as far as possible, and to reduce grounding resistance, earth resistance should be less than 4 Ω, and sectional area is answered 〉=2mm
2, length≤20m; The contact-making surface of earth connection and shared earth terminal (or casing) is big as far as possible, connects and answers firm stable, must not become flexible or get rusty.
The beneficial effects of the utility model are:
The utility model is only considered to carry out Filtering Processing at affected control power supply, and so not only input cost is low, is easier to implement, and more meets on-site actual situations.
(4) description of drawings
Fig. 1 is the theory diagram that the utility model composite heat carrier generator control system suppresses frequency converter high order harmonic component EVAC (Evacuation Network Computer Model).
Reference numeral among the figure:
Alternating current motor 1, frequency converter 2, power supply 3, isolating transformer 4, alternating current filter 5, Switching Power Supply 6, DC filter 7, electronic instruments 8.
(5) embodiment
Referring to Fig. 1, Fig. 1 is the theory diagram that the utility model composite heat carrier generator control system suppresses frequency converter high order harmonic component EVAC (Evacuation Network Computer Model).As seen from Figure 1, the utility model composite heat carrier generator control system suppresses frequency converter high order harmonic component EVAC (Evacuation Network Computer Model), comprise alternating current motor 1, frequency converter 2, power supply 3, Switching Power Supply 6, electronic instruments 8 and power line, power line between described power supply 3 and the electronic instruments 8 is provided with an isolating transformer 4, one alternating current filter 5 and a direct current filter 7, described isolating transformer 4 primary sides lead-in wire connects power supply 3, isolating transformer secondary side lead-in wire connects alternating current filter 5, alternating current filter 5 and DC filter 7 are installed in the front and back of Switching Power Supply 6 respectively, and DC filter 7 is arranged on electronic instruments 8 input sides.
Concrete operations are as follows:
1. guarantee that all devices ground connection in the control cubicle is good, use short, thick earth connection (adopt strap or wire netting, because of its impedance when the high frequency lower) to be connected on the common ground.Press national Specification, its earth resistance should be less than 4 Ω.In addition the control appliance that links to each other with frequency converter (as PLC or other intelligence instrument) will with its altogether.
2. power cable and control cable, signal cable are separately set up during installation wiring, the above distance of 20cm is used independently wire casing, crane span structure etc. at interval, so that cut off radiated interference each other.If control cable must be intersected with power cable, become 90 ° of cross wires.
Select armoured cable when 3. selecting power cable and do not select common cable, and the necessary reliable ground of screen, can significantly reduce the radiated interference of power line high order harmonic component like this to peripheral equipment and electronic device.
When 4. using shielded conductor or twisted-pair feeder to connect control circuit, it is short as far as possible to guarantee not shield part, should adopt cable sleeve during conditions permit.
When 5. using shielding and armoured cable, with the screen two-terminal-grounding as the motor wiring.
Claims (1)
1. a composite heat carrier generator control system suppresses frequency converter high order harmonic component EVAC (Evacuation Network Computer Model), comprise alternating current motor (1), frequency converter (2), power supply (3), Switching Power Supply (6), electronic instruments (8) and power line, it is characterized in that: the power line between described power supply (3) and the electronic instruments (8) is provided with an isolating transformer (4), one alternating current filter (5) and a direct current filter (7), described isolating transformer (4) primary side lead-in wire connects power supply (3), isolating transformer secondary side lead-in wire connects alternating current filter (5), alternating current filter (5) and DC filter (7) are installed in the front and back of Switching Power Supply (6) respectively, and DC filter (7) is arranged on electronic instruments (8) input side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201476120U CN201667611U (en) | 2010-03-25 | 2010-03-25 | System for inhibiting higher harmonic interference of frequency converter by compound heat carrier generator control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201476120U CN201667611U (en) | 2010-03-25 | 2010-03-25 | System for inhibiting higher harmonic interference of frequency converter by compound heat carrier generator control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201667611U true CN201667611U (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201476120U Expired - Fee Related CN201667611U (en) | 2010-03-25 | 2010-03-25 | System for inhibiting higher harmonic interference of frequency converter by compound heat carrier generator control system |
Country Status (1)
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| CN (1) | CN201667611U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832833A (en) * | 2012-09-24 | 2012-12-19 | 核工业理化工程研究院 | Alternating current to direct current conversion device of intermediate frequency converter |
| CN104935155A (en) * | 2015-06-15 | 2015-09-23 | 山东超越数控电子有限公司 | Design method for DC-DC power ripple rejection |
| CN113161874A (en) * | 2021-03-01 | 2021-07-23 | 攀钢集团西昌钢钒有限公司 | Grounding system of motor transmission system |
-
2010
- 2010-03-25 CN CN2010201476120U patent/CN201667611U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832833A (en) * | 2012-09-24 | 2012-12-19 | 核工业理化工程研究院 | Alternating current to direct current conversion device of intermediate frequency converter |
| CN102832833B (en) * | 2012-09-24 | 2015-07-15 | 核工业理化工程研究院 | Alternating current to direct current conversion device of intermediate frequency converter |
| CN104935155A (en) * | 2015-06-15 | 2015-09-23 | 山东超越数控电子有限公司 | Design method for DC-DC power ripple rejection |
| CN104935155B (en) * | 2015-06-15 | 2017-06-20 | 山东超越数控电子有限公司 | A kind of method for designing for DC D/C power Ripple Suppressions |
| CN113161874A (en) * | 2021-03-01 | 2021-07-23 | 攀钢集团西昌钢钒有限公司 | Grounding system of motor transmission system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU DAJIANG PETROLEUM TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: JIANGSU XINDA PETROLEUM TECHNOLOGY SERVICE CO., LTD. Effective date: 20120331 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120331 Address after: 214446 Shi Zhuang Park, Jiangyin Economic Development Zone, Jiangsu, China Patentee after: Jiangsu Dajiang Petrotech Co., Ltd. Address before: 214446 No. 1240 West Binjiang Road, Lingang New Town, Jiangsu, Jiangyin Patentee before: Jiangsu Xinda Petroleum Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101208 Termination date: 20160325 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |