CN109038584A - A kind of voltage transformer triple-frequency harmonics suppressor - Google Patents
A kind of voltage transformer triple-frequency harmonics suppressor Download PDFInfo
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- CN109038584A CN109038584A CN201810903788.5A CN201810903788A CN109038584A CN 109038584 A CN109038584 A CN 109038584A CN 201810903788 A CN201810903788 A CN 201810903788A CN 109038584 A CN109038584 A CN 109038584A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The present invention discloses a kind of voltage transformer triple-frequency harmonics suppressor, including pre-filter circuit, the first common mode filtering circuit and the second common mode filtering circuit, the first common mode filtering circuit are connect with pre-filter circuit and the second common mode filtering circuit respectively；Pre-filter circuit includes mutual inductor, the first inductance, first resistor, first capacitor, the second inductance, the second capacitor and second resistance；First common mode filtering circuit includes third inductance, the 4th inductance, the 4th capacitor and the 5th capacitor；Second common mode filtering circuit includes the 5th inductance, the 6th inductance, the 7th inductance, the 8th inductance, the 6th capacitor, the 7th capacitor and the 8th capacitor.The present invention can carry out the inhibition of triple-frequency harmonics by pre-filter circuit, the first common mode filtering circuit and the second common mode filtering circuit to alternating current, to achieve the effect that inhibit radio frequency interference, improve the stability of circuit, the triple-frequency harmonics suppressor circuit has the characteristics that circuit is simple, practical and filter effect is good.
Description
Technical field
The invention belongs to harmonic suppression techniques, are related to a kind of voltage transformer triple-frequency harmonics suppressor.
Background technique
The function of filter is exactly that the signal of a certain component frequency is allowed smoothly to pass through, and the letter of another part frequency
Number then by biggish inhibition, it is substantially a frequency selection circuit.In filter, signal can by frequency range,
Referred to as passband or passband；Conversely, signal is known as stopband by very big decaying or repressed frequency range completely；Passband and resistance
Boundary frequency between band is known as cutoff frequency；Voltage gain of the ideal filter in passband is constant, the electricity in stopband
Pressing gain is zero；There are the intermediate zones of certain frequency range between the passband and stopband of practical filter.
With popularizing for current converter technique, damage of the harmonic current to power grid is increasingly serious, for effectively containment harmonic wave electricity
The negative interaction of stream needs to efficiently control the amplitude of harmonic current.
From the point of view of the realistic problem of social concerns, harmonic current mainly causes following problems: first is that issuing power plant
Electric energy be unable to fully utilize, cause power grid utilization rate of electrical low；Second is that current value increases in power grid, the diameter etc. of circuit lines
Quality factor requires to increase；Third is that the increasing of harmonic current is easy to make circuit itself to generate heat power consumption, even cause fire；Fourth is that
Bigger than normal easily cause of harmonic current causes public electric wire net quality variation, influences other users power quality etc..In order to solve these
Problem, national authorities are directed to each different industries, different harmonic current control standards have been formulated, such as to air-conditioning, refrigerator
Equal white goods industries should execute the standard of GB17625.1-2003.In face of the limitation requirement of country, the engineering skill of household electric appliances
Art personnel realize the technical requirements of national standard taking various methods, technically improve circuit function with finding in circuit design
The channel of rate factor inhibits the influence of harmonic current.The main method taken at present has two classes: one kind is active power factor
Correcting circuit is only applicable to use in low power appliance circuit, and circuit design higher cost affects electric appliance itself
Market price competition power；It is another kind of to use capacitance compensation method, the large-power occasions such as power distribution station are relatively specific for, and it is small to household appliances
Power circuit occasion uses seldom, and the added cost problem of electric appliance is equally caused using special electric power power compensation capacitor.
There are electromagnetic interference environments to be on the rise in em filtering, and supply harmonic and radio frequency interference inhibitory effect difference etc. are asked
Topic, seriously affects electromagnetic interference, now refers to a kind of voltage transformer triple-frequency harmonics suppressor in order to solve problem above.
Summary of the invention
The purpose of the present invention is to provide a kind of voltage transformer triple-frequency harmonics suppressors, pass through pre-filter circuit, one
Common mode filtering circuit and the second common mode filtering circuit filter the harmonic wave in circuit three times, can be effectively in suppression circuit
Harmonic wave solves existing harmonic suppression circuit, and existing filter effect is poor, annoyance level is big and problem at high cost.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of voltage transformer triple-frequency harmonics suppressor, including pre-filter circuit, the first common mode filtering circuit and second
Common mode filtering circuit, the first common mode filtering circuit are connect with pre-filter circuit and the second common mode filtering circuit respectively；
Pre-filter circuit include mutual inductor T, the first inductance L1, first resistor R1, first capacitor C1, the second inductance L2,
Second capacitor C2 and second resistance R2；
First common mode filtering circuit includes third inductance L3, the 4th inductance L4, the 4th capacitor C4 and the 5th capacitor C5；
Second common mode filtering circuit includes the 5th inductance L5, the 6th inductance L6, the 7th inductance L7, the 8th inductance L8, the 6th
Capacitor C6, the 7th capacitor C7 and the 8th capacitor C8；
First one end inductance L1 is connect with voltage input one end, and the other end is connect with mutual inductor T first end, mutual inductor T
Three ends are connect by concatenated first resistor R1 and first capacitor C1 with the 4th end mutual inductor T, mutual inductor T second end and the second electricity
Feel the connection of the one end L2, the second inductance L2 other end is connect by the second capacitor C2 with the voltage input other end, the second inductance L2 and
In parallel with second resistance R2 after second capacitor C2 series connection, second resistance R2 is in parallel with third capacitor C3；
Mutual inductor T second end is connect by third inductance L3 with the 4th capacitor C4, and the voltage input other end passes through the 4th electricity
Sense L4 is connect with the 5th capacitor C5, and the 4th capacitor C4 connects with the 5th capacitor C5；
Third inductance L3 is successively connect with the 5th inductance L5 and the 6th inductance L6, the 4th inductance L4 successively with the 7th inductance L7
It is connected with the 8th inductance L8, the 7th capacitor C7 connects with the 8th capacitor C8, and in parallel with the 6th capacitor C6 after series connection, and the 6th electricity
Sense L6 is connect with the 6th one end capacitor C6, and the 6th capacitor C6 other end is connect with the 8th inductance L8.
Further, the third inductance L3 and the 4th inductance L4 is common mode inductance, the 4th capacitor C4 and the 5th capacitor C5
For common mode capacitance.
Further, the 5th inductance L5 and the 7th inductance L7 is common mode inductance, the 6th inductance L6 and the 8th inductance L8
For common mode inductance, the 7th capacitor C7 and the 8th capacitor C8 are common mode capacitance.
Beneficial effects of the present invention:
Triple-frequency harmonics suppressor provided by the invention, it is total by pre-filter circuit, the first common mode filtering circuit and second
Mould filter circuit can carry out the inhibition of triple-frequency harmonics to alternating current, to achieve the effect that inhibit radio frequency interference, improve circuit
Stability, the triple-frequency harmonics suppressor circuit, have circuit structure it is simple, it is practical and inhibit filter effect add it is good
Feature.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of schematic diagram of voltage transformer triple-frequency harmonics suppressor in the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Refering to Figure 1, a kind of voltage transformer triple-frequency harmonics suppressor, including pre-filter circuit, the first common mode
Filter circuit and the second common mode filtering circuit, the first common mode filtering circuit are electric with pre-filter circuit and the second common mode filtering respectively
Road connection；
Pre-filter circuit include mutual inductor T, the first inductance L1, first resistor R1, first capacitor C1, the second inductance L2,
Second capacitor C2 and second resistance R2；
First common mode filtering circuit includes third inductance L3, the 4th inductance L4, the 4th capacitor C4 and the 5th capacitor C5,
In, third inductance L3 and the 4th inductance L4 are common mode inductance, and the 4th capacitor C4 and the 5th capacitor C5 are common mode capacitance；
Second common mode filtering circuit includes the 5th inductance L5, the 6th inductance L6, the 7th inductance L7, the 8th inductance L8, the 6th
Capacitor C6, the 7th capacitor C7 and the 8th capacitor C8, wherein the 5th inductance L5 and the 7th inductance L7 is common mode inductance, the 6th inductance
L6 and the 8th inductance L8 is common mode inductance, and the 7th capacitor C7 and the 8th capacitor C8 are common mode capacitance；
First one end inductance L1 is connect with voltage input one end, and the other end is connect with mutual inductor T first end, mutual inductor T
Three ends are connect by concatenated first resistor R1 and first capacitor C1 with the 4th end mutual inductor T, mutual inductor T second end and the second electricity
Feel the connection of the one end L2, the second inductance L2 other end is connect by the second capacitor C2 with the voltage input other end, the second inductance L2 and
In parallel with second resistance R2 after second capacitor C2 series connection, second resistance R2 is in parallel with third capacitor C3；
Mutual inductor T second end is connect by third inductance L3 with the 4th capacitor C4, and the voltage input other end passes through the 4th electricity
Sense L4 is connect with the 5th capacitor C5, and the 4th capacitor C4 connects with the 5th capacitor C5；
Third inductance L3 is successively connect with the 5th inductance L5 and the 6th inductance L6, the 4th inductance L4 successively with the 7th inductance L7
It is connected with the 8th inductance L8, the 7th capacitor C7 connects with the 8th capacitor C8, and in parallel with the 6th capacitor C6 after series connection, and the 6th electricity
Sense L6 is connect with the 6th one end capacitor C6, and the 6th capacitor C6 other end is connect with the 8th inductance L8.
During use, the voltage input of input is after the first inductance L1, by by mutual inductor T, first resistor R1
The stability that input current is improved with the pre-filter circuit of first capacitor C1 composition, so that circuit keeps stable concussion shape
State, the stabilization alternating current through pre-filter circuit output pass through common mode inductance and common mode capacitance filter in the first common mode filtering circuit
Except harmonic wave in electric current, finally by two common mode inductances and a common mode capacitance in the second common mode filtering circuit, can further filter
Except the harmonic wave in electric current, the harmonic wave in circuit can be effectively inhibited, to achieve the effect that inhibit radio frequency interference, improves circuit
Stability.
Harmonic suppression circuit works as resonance for inductance capacitance parallel circuit according to the series connection and principle of parallel of inductance capacitance
Very high impedance can be presented when being harmonic frequency in frequency；For inductance capacitance series circuit, when resonance frequency is harmonic frequency
Very low impedance can be presented.Thus the harmonic wave to inhibit power supply to generate.
Triple-frequency harmonics suppressor provided by the invention, it is total by pre-filter circuit, the first common mode filtering circuit and second
Mould filter circuit can carry out the inhibition of triple-frequency harmonics to alternating current, to achieve the effect that inhibit radio frequency interference, improve circuit
Stability, the triple-frequency harmonics suppressor circuit, have circuit structure it is simple, it is practical and inhibit filter effect add it is good
Feature.
The above content is just an example and description of the concept of the present invention, affiliated those skilled in the art
It makes various modifications or additions to the described embodiments or is substituted in a similar manner, without departing from invention
Design or beyond the scope defined by this claim, be within the scope of protection of the invention.
Claims (3)
1. a kind of voltage transformer triple-frequency harmonics suppressor, it is characterised in that: including pre-filter circuit, the first common mode filtering electricity
Road and the second common mode filtering circuit, the first common mode filtering circuit connect with pre-filter circuit and the second common mode filtering circuit respectively
It connects；
Pre-filter circuit includes mutual inductor T, the first inductance L1, first resistor R1, first capacitor C1, the second inductance L2, second
Capacitor C2 and second resistance R2；
First common mode filtering circuit includes third inductance L3, the 4th inductance L4, the 4th capacitor C4 and the 5th capacitor C5；
Second common mode filtering circuit includes the 5th inductance L5, the 6th inductance L6, the 7th inductance L7, the 8th inductance L8, the 6th capacitor
C6, the 7th capacitor C7 and the 8th capacitor C8；
First one end inductance L1 is connect with voltage input one end, and the other end is connect with mutual inductor T first end, mutual inductor T third end
It is connect by concatenated first resistor R1 and first capacitor C1 with the 4th end mutual inductor T, mutual inductor T second end and the second inductance L2
One end connection, the second inductance L2 other end are connect by the second capacitor C2 with the voltage input other end, the second inductance L2 and second
In parallel with second resistance R2 after capacitor C2 series connection, second resistance R2 is in parallel with third capacitor C3；
Mutual inductor T second end is connect by third inductance L3 with the 4th capacitor C4, and the voltage input other end passes through the 4th inductance L4
It is connect with the 5th capacitor C5, and the 4th capacitor C4 connects with the 5th capacitor C5；
Third inductance L3 is successively connect with the 5th inductance L5 and the 6th inductance L6, the 4th inductance L4 successively with the 7th inductance L7 and
Eight inductance L8 connections, the 7th capacitor C7 connect with the 8th capacitor C8, and in parallel with the 6th capacitor C6 after series connection, and the 6th inductance L6
It is connect with the 6th one end capacitor C6, the 6th capacitor C6 other end is connect with the 8th inductance L8.
2. a kind of voltage transformer triple-frequency harmonics suppressor according to claim 1, it is characterised in that: the third inductance
L3 and the 4th inductance L4 is common mode inductance, and the 4th capacitor C4 and the 5th capacitor C5 are common mode capacitance.
3. a kind of voltage transformer triple-frequency harmonics suppressor according to claim 1, it is characterised in that: the 5th inductance
L5 and the 7th inductance L7 is common mode inductance, and the 6th inductance L6 and the 8th inductance L8 are common mode inductance, the electricity of the 7th capacitor C7 and the 8th
Appearance C8 is common mode capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810903788.5A CN109038584A (en) | 2018-08-09 | 2018-08-09 | A kind of voltage transformer triple-frequency harmonics suppressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810903788.5A CN109038584A (en) | 2018-08-09 | 2018-08-09 | A kind of voltage transformer triple-frequency harmonics suppressor |
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| Publication Number | Publication Date |
|---|---|
| CN109038584A true CN109038584A (en) | 2018-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810903788.5A Pending CN109038584A (en) | 2018-08-09 | 2018-08-09 | A kind of voltage transformer triple-frequency harmonics suppressor |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2676486Y (en) * | 2003-11-06 | 2005-02-02 | 青岛海信空调有限公司 | A single harmonic current suppressor |
| CN203039568U (en) * | 2012-12-27 | 2013-07-03 | 孙明云 | Power supply harmonic wave and radio frequency interference suppressor |
| CN205911945U (en) * | 2016-08-23 | 2017-01-25 | 合肥博雷电气有限公司 | Variable frequency air conditioner is with high -power power harmonic suppression device |
-
2018
- 2018-08-09 CN CN201810903788.5A patent/CN109038584A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2676486Y (en) * | 2003-11-06 | 2005-02-02 | 青岛海信空调有限公司 | A single harmonic current suppressor |
| CN203039568U (en) * | 2012-12-27 | 2013-07-03 | 孙明云 | Power supply harmonic wave and radio frequency interference suppressor |
| CN205911945U (en) * | 2016-08-23 | 2017-01-25 | 合肥博雷电气有限公司 | Variable frequency air conditioner is with high -power power harmonic suppression device |
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Application publication date: 20181218 |
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