CN104538963B - Adaptive filter - Google Patents
Adaptive filter Download PDFInfo
- Publication number
- CN104538963B CN104538963B CN201410640364.6A CN201410640364A CN104538963B CN 104538963 B CN104538963 B CN 104538963B CN 201410640364 A CN201410640364 A CN 201410640364A CN 104538963 B CN104538963 B CN 104538963B
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- electric capacity
- circuit
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- 230000003044 adaptive effect Effects 0.000 title abstract description 4
- 239000003990 capacitor Substances 0.000 claims abstract description 26
- 239000000203 mixture Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 5
- 238000007600 charging Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000000284 extract Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 238000004377 microelectronic Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Filters And Equalizers (AREA)
Abstract
The invention provides an adaptive filter which effectively eliminates noise and peaks with 2kHz-1MHz frequency in an industrial power distribution system. According to the adaptive filter, harmonic power frequency voltage is independently used as reference voltage, and a harmonic component is traced along the reference voltage. Noise consists of a series of random peaks and has no alternating current and direct current difference, so that the noise can be filtered in the traditional RC (Resistance-Capacitance) or RCL (Resistance-Capacitance-Inductance) circuit and an active filtering network. Voltage reduction can ensure that a used large-value capacitor can effectively extend a filtering frequency range to 2kH2. The method is high in cost and large in space occupation.
Description
[technical field]
The present invention relates to field of circuit technology, a kind of specifically sef-adapting filter.
[background technology]
Significantly improve in terms of automatic business processing and productivity in past 25 years, we have witnessed microelectronics
The trend that the progress of technology and power-efficient are lifted.However, power industry faces the challenge of arduousness in terms of power supply quality is maintained.
The electric power interference that new technology is brought, causes downtime to extend, loss of data, device damage, and power-efficient is low and produces
Power declines.Therefore, thoroughly eliminate interference and improve client's productivity ratio it is critical that.
In the past, electrical Interference is essentially from thunderbolt, ground connection and electrical equipment.Breaker and ground connection can ensure electrical network and
Equipment normally runs.And current, the Switching Power Supply of 85% electric pollution used in microelectronic component, another part is then
Come from variable frequency drives, robot technology, data network, ballast illumination etc..Due to most operated devices with set
It is standby to occupy identical frequency bandwidth, electromagnetic interference is brought, this produces significant impact to modern microelectronic devices.Power transmission
Line serves as spaced antenna, the electromagnetic interference signal outside the antenna collection thousands of miles.These signals will be suitable by transmission line
Transformer, control system is directly entered.Electric harmonic from a few KHz to 1MHz frequency ranges is more harmful to electric energy.Greatly
Switching Power Supply in most control systems can effectively compensate for low frequency (less than several KHz) line voltage distribution change.However, these are electric
Source can also produce power noise and spike under high frequency state, and enter the whole outmoded distribution being connected with electrical load guarantor
System, circuit inherently can effectively weaken the interference of about 1MHz.
Wiring is seemed uses many series inductances, the crowd of some series resistances (Kelvin effect) and sizable shunt capacitance composition
Many low pass filters, the step-down and isolating transformer in circuit also takes on Partial filtration.Therefore, effectively screen and filter spike
It is able to ensure that the electrical system operation is stable.
Active and passive filter has all been widely used in microelectronics system, however, seldom using in supply line
They carry out harmonic carcellation.On the one hand, due to having used IC chip, active filter can only be in limited voltage range
Running, they run generally in the voltage environment of below 15V, and practical application need to be under the voltage of hundreds of volts, another aspect,
Passive filter is made up of electric capacity and inductance network, and generally, the electric current in circuit can reach hundreds of amperes, and
Arbitrary capacitor or inductor are all unpractical used in series circuit.
Thus, a parallel filter is selected to be unique feasible, pole easy means are to use a capacitor as filtering
Device, actual available high capacity capacitor, capacitor can reach the rated value of 1uF in the case of close 1000V.For one
Typical voltage 380V, for the system of power 40Kw, load resistance is 4ohm or so. therefore, the corner frequency of RC wave filters
It is 40KHz or so, effective frequency filtering is in 400kHz or so, and this is invalid in target frequency bandwidth range.
United States Patent (USP) 6486570 and 7446436 is pointed out to be connected on by rheostat by an inductor, capacitor, inductor,
The parallel filter constituted on resistor and indicator lamp network circuit in parallel.To effectively eliminate high-frequency noise, the first string
Connection inductance value must be very little so that being ignored completely.These equipment will become effective shunt rheostat, capacitor and damping
Circuit.As discussed before, actual electric capacity can only filter the noise of more than 400kHz, and rheostat can clamp out big point
Peak, because noise is superimposed upon on AC power line, varistor voltage have to be larger than peak power rating, therefore, these filtering
Device is not very effective.
[content of the invention]
The invention aims to interference of the modern microelectronic components and parts to electrical system is solved, and existing power supply is filtered
Ripple device can only filter the noise of more than 400kHz, it is impossible to effectively filter the technical problem of the high-frequency harmonic in power circuit, if
Meter is a kind of to dissipate upper frequency and is diverted to capacitor, effective filters out the adaptive of low-and high-frequency noise jamming in power circuit
Answer wave filter.
A kind of sef-adapting filter, is made up of following part：
(1). fuse
(2). the bleeder circuit being mainly made up of the capacitive element of inductance component series connection with it
A. under the fundamental frequency of 50Hz to 60Hz, inductance component L is in channel status, is then under the frequency of 2kHz to 1MHz
With respect to high-impedance state；
B. under the fundamental frequency of 50Hz to 60Hz, the impedance of the impedance ratio inductance component L of electric capacity C2 is big；
C. also, frequency be 2kHz to 1MHz when inductive circuit impedance ratio capacitive part impedance it is bigger；
(3). the inductance component of RC circuit in parallel to the circuit is filtered, and eliminates making an uproar between 2kHz to 1MHz frequencies
Sound and spike
A. under fundamental frequency, RC circuit impedances are less than or equal to the impedance of the inductance component；
B. under the frequency of 2kHz to 1MHz, source impedance Zs of the RC circuit impedances less than load RL and 1/10th；
C.2kHz the frequency noise and spike to 1MHz is stored up at first in electric capacity C2 and electric capacity C3, is then transferred into electric capacity
C3；
(4). unnecessary electric charge in dissipation circuit, it is intended to the noise energy dissipated in electric capacity C3, and slow releasing capacitor,
Therefore excessive noise jamming can't be produced in the frequency range of 2kHz to 1MHz.
Sensing part composition sensor circuit, sensor circuit is circuit of the inductance value 0.5 to 40mH scopes, with ability
The LCR lattice networks that domain one of ordinary skill makes realize identical effect.
Capacitive element constitutes capacitor circuit, and capacitor circuit is circuit of the capacitance 0.5 to 2uF scopes, with
The LCR lattice networks that the one of ordinary skill of this area makes realize identical effect.
RC circuits are the parallel circuits of capacitor C3 and resistance R1 compositions, and capacitance is in 100uF to -1mF, and rated voltage is low
To 10V, R1 controls the discharge rate of capacitor, obtains 1/ (2 π R1C3)<2kHz.
In described RC circuits, electric capacity C3 series connection one small resistance value R3 of addition is during the charging and discharging of capacitor
Consume some noise powers.
It is common that as little as 5 volts of voltage in described circuit, RLC wave filters and active filter configuration can apply to this area
In the RC circuits that technical staff makes.
Dissipation circuit is 1/ (a 2 π R2C2) of satisfaction<The resistor R2 of 2kHz.
RLC wave filters are configured to be realized by one of ordinary skill in the art in the condition according to (4).
Rheostat and capacitor C1 are used in parallel with parallel filter, rheostat be in order to protection system is from flash,
Under the high-frequency of 100kHz to 1MHz, capacitor is used as a preliminary wave filter.
Described circuit includes power-supplying circuit, inductance L, the electricity that power supply Vs, source resistance Rs and source inductance Ls are constituted
Resistance R1 and electric capacity C2 composition voltage dividers and resistance R2, R3, R4, the circuit network of LED composition, power supply Vs, source
Resistance Rs, source inductance Ls are connected with switched resistive load RL, and source resistance Rs extracts one end parallel connection fuse Fuse, inductance L, electricity out
Hold C2 to power supply Vs one end, inductance L, electric capacity C2 two ends difference shunt capacitance C1 and piezo-resistance MOV, electric capacity C3, resistance R5 string
Inductance L two ends are connected in parallel to after connection, inductance L two ends parallel resistance R1, resistance R3 is connected in parallel to electric capacity after connecting with LED
C2 two ends, inductance C2 two ends parallel resistances R2 and R10.
Advantages of the present invention compared with the existing technology, has an advantage in that：Power frequency supply voltage is used as into reference, upper frequency
Noise is dissipated and is diverted to capacitor, is then dissipated to ground, effectively eliminates 2kHz to 1MHz frequencies in industrial power distribution systems
Between noise and spike, harmonic wave point can be followed the trail of along reference voltage individually using the power-frequency voltage in harmonic wave as reference voltage
Amount, because noise is made up of a series of random peaks, not alternating current-direct current point, noise in traditional RC, RCL circuits and
Can be filtered out in active power filtering network, step-down also ensures that the large value capacitor for using effectively extends to frequency filtering
The scope of 2kHz, this mode high cost, and it is big to take up room.
[description of the drawings]
Fig. 1 is the schematic diagram of the sef-adapting filter of the present invention；
Fig. 2 is tracking filter schematic diagram in the present invention；
Figure of abstract of the specified Fig. 1 as the present invention.
[specific embodiment]
Below in conjunction with the accompanying drawings the invention will be further described, for the structure and principle of this device people professional to this
It is to be perfectly clear readily understood, specific embodiment described herein only to explain the present invention, is not intended to limit the present invention.
The present invention is that power frequency supply voltage is used as into reference, and higher frequency noise is dissipated and is diverted to capacitor, then
Ground is dissipated to, as shown in Figure 1.Vs, RS, and LS's is respectively power line supply voltage, source resistance, and source inductance, generally
The low-voltage for being used in the distribution system of many industrial premises is 110V, 220V, 380V, 480V and 760V, can be it is single-phase or
Three-phase.
Described by this example is the utilization in a monophase system.It can easily extend and use the three of three-phase system
In angular or star-configured system.Typical single-phase linear heat generation rate be tens or kilowatt.Source resistance and inductance ordinarily be about 0.01ohm
And 20uH, ZL are typically several ohm of load impedance.
Shown in Fig. 1 realized under specific power condition, is the circuit theory diagrams of parallel filter.Wherein insure
Silk is that, in order to protection system is from too high voltages, rheostat vises high voltage spike, and capacitor is provided under an intermediate frequency
High-pass filter, by L, the voltage divider with C2 compositions R1 in parallel, with by R2, the circuit network of R3, R4, LED composition is in parallel,
The fundametal compoment of reference voltage approximately power supply is made, under target noise frequency, the impedance of inductor is very high, and lower half
The impedance of portion's network is extremely low, and any noise all will be charged by R1 to electric capacity, and noise energy is transmitted by R1 and finally disappeared
Scattered, while charging to electric capacity, excess charge in the capacitor can slowly be disappeared by R2, the network of R3, R4 and LED composition
Dissipate, across the Static Electro pressure drop very little of L, the specified large capacitor C3 of low-voltage can be used in parallel with L and R1, this capacitor
Easily it is made into small volume and equipment with low cost.Noise energy train of pulse will be stored in capacitor, and be discharged by R1,
Be substantially high-frequency noise and spike across the voltage of L, R1 and C3 is in parallel, be in order to store C3 in initial noise energy simultaneously
R1 and C2 and its circuit network are discharged into, therefore, the noise of the power supply that is added to can be eliminated with (as shown in Figure 2).Due to C3
Being not substantially affected by constant AC or DC bias affects, and specified (30 to the 100V) capacitor of low-voltage can be used,
100uF's is applied both to these voltage rating circuits to the high capacity in the range of 500uF.It is compact reliable and economy
's.RL and Zs typically only have several ohms, Z=0.35ohm, for a 3.5Ohm load, noise in industrial power distribution systems
Electric current will reduce by 20 decibels, i.e., noise power under a load can reduce -10dB.
Claims (9)
1. a kind of sef-adapting filter, is made up of following part：
(1). fuse；
(2). the bleeder circuit being mainly made up of the electric capacity C2 of inductance component L series connections with it；
A. under the fundamental frequency of 50Hz to 60Hz, inductance component L is then under the frequency of 2kHz to 1MHz in channel status
With respect to high-impedance state；
B. under the fundamental frequency of 50Hz to 60Hz, the impedance ratio inductance component L impedances of electric capacity C2 are big；
C. also, frequency be 2kHz to 1MHz when inductive circuit impedance ratio capacitive element impedance it is bigger；
(3). RC circuit in parallel is filtered to inductance component L, and eliminates noise and spike between 2kHz to 1MHz frequencies；
A. under the fundamental frequency of 50Hz to 60Hz, RC circuit impedances are less than or equal to the impedance of the inductance component L；
B. under the frequency of 2kHz to 1MHz, source impedance Zs of the RC circuit impedances less than load RL and 1/10th；
C.2kHz the frequency noise and spike to 1MHz is stored up at first in electric capacity C2 and electric capacity C3, is then transferred into electric capacity C3；
(4). dissipation circuit, it is intended to the noise energy dissipated in electric capacity C3, and electric charge unnecessary in capacitive element is slowly discharged, because
This can't produce excessive noise jamming in the frequency range of 2kHz to 1MHz.
2. a kind of sef-adapting filter as claimed in claim 1, it is characterised in that inductance component L constitutes inductive circuit, inductance
Circuit be an inductance value 0.5 to 40mH scopes circuit, realize identical effect with LCR lattice networks.
3. a kind of sef-adapting filter as claimed in claim 1, it is characterised in that capacitive element constitutes capacitor circuit, electric capacity
Device circuit be a capacitance 0.5 to 2uF scopes circuit, realize identical effect with LCR lattice networks.
4. a kind of sef-adapting filter as claimed in claim 1, it is characterised in that RC circuits are that electric capacity C3 and resistance R1 is constituted
Parallel circuit, capacitance in 100uF to 1mF, rated voltage as little as 10V, R1 control electric capacity C3 discharge rate, obtain 1/ (2
πR1C3)<2kHz。
5. a kind of sef-adapting filter as claimed in claim 4, it is characterised in that in described RC circuits, electric capacity C3 series connection adds
Plus the resistance R5 of a small resistance value consumes some noise powers during the charging and discharging of electric capacity C3.
6. a kind of sef-adapting filter as claimed in claim 1, it is characterised in that the voltage as little as 5 in described RC circuits
Volt, RLC wave filters and active filter configuration can apply in RC circuits.
7. a kind of sef-adapting filter as claimed in claim 1, it is characterised in that dissipation circuit is 1/ (2 π of satisfaction
R2C2)<The resistance R2 of 2kHz.
8. a kind of sef-adapting filter as claimed in claim 1, it is characterised in that piezo-resistance MOV and electric capacity C1 are in parallel, with
Sef-adapting filter is used in parallel, and piezo-resistance MOV is in order to protection system is from flash, in the high frequency of 100kHz to 1MHz
Under rate, electric capacity C1 is used as a preliminary wave filter.
9. a kind of sef-adapting filter as claimed in claim 1, it is characterised in that including power supply Vs, source resistance Rs and source electrode electricity
The voltage divider of the power-supplying circuit of sense Ls tri- parts composition, inductance component L, resistance R1 and the parts of electric capacity C2 tri- composition and
Resistance R2, R3, R4, the circuit network of the part of LED four composition, power supply Vs, source resistance Rs, source inductance Ls and load
RL connects, and source resistance Rs extracts one end parallel connection fuse, inductance component L, electric capacity C2 to power supply Vs one end out, described fuse with
Connect between inductance component L and electric capacity C2, inductance component L is connected in parallel to respectively electric capacity C1 and piezo-resistance after connecting with electric capacity C2
Be connected in parallel to inductance component L two ends after MOV, electric capacity C3, resistance R5 series connection, inductance component L two ends parallel resistance R1, resistance R3 with send out
Electric capacity C2 two ends, electric capacity C2 two ends difference parallel resistance R2 and R4 are connected in parallel to after optical diode LED strip connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410640364.6A CN104538963B (en) | 2014-11-13 | 2014-11-13 | Adaptive filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410640364.6A CN104538963B (en) | 2014-11-13 | 2014-11-13 | Adaptive filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104538963A CN104538963A (en) | 2015-04-22 |
| CN104538963B true CN104538963B (en) | 2017-04-19 |
Family
ID=52854455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410640364.6A Expired - Fee Related CN104538963B (en) | 2014-11-13 | 2014-11-13 | Adaptive filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN104538963B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113364271A (en) * | 2018-12-24 | 2021-09-07 | 广东美的白色家电技术创新中心有限公司 | System for inhibiting conduction EMI (electro-magnetic interference) for switch tube and household appliance |
| JP7129355B2 (en) * | 2019-02-01 | 2022-09-01 | デクセリアルズ株式会社 | protection circuit |
| CN113675851A (en) * | 2021-08-17 | 2021-11-19 | 西安西电电力系统有限公司 | Passive filter bank with variable tuning frequency and tuning frequency control method |
| CN115085768B (en) * | 2022-08-24 | 2022-11-29 | 广东金朋科技有限公司 | Power line noise separation isolation frame |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5731965A (en) * | 1996-06-21 | 1998-03-24 | Wisconsin Alumni Research Foundation | Power line harmonic reduction by hybrid parallel active/passive filter system with square wave inverter and DC bus control |
| CN1309140C (en) * | 2002-08-20 | 2007-04-04 | 环境潜能股份有限公司 | Waveform correcting filter |
| JP2007236137A (en) * | 2006-03-02 | 2007-09-13 | Fuji Electric Holdings Co Ltd | Noise filter |
| US7446436B2 (en) * | 2006-03-27 | 2008-11-04 | Environmental Potentials, Inc. | Waveform correction filters |
| US9112351B2 (en) * | 2013-02-05 | 2015-08-18 | Freescale Semiconductor Inc. | Electrostatic discharge circuit |
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2014
- 2014-11-13 CN CN201410640364.6A patent/CN104538963B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN104538963A (en) | 2015-04-22 |
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Granted publication date: 20170419 |