CN105553242A - Method and method for suppressing industrial frequency harmonic disturbance of AC-DC (Alternating Current-Direct Current) power supply - Google Patents
Method and method for suppressing industrial frequency harmonic disturbance of AC-DC (Alternating Current-Direct Current) power supply Download PDFInfo
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- CN105553242A CN105553242A CN201610084698.9A CN201610084698A CN105553242A CN 105553242 A CN105553242 A CN 105553242A CN 201610084698 A CN201610084698 A CN 201610084698A CN 105553242 A CN105553242 A CN 105553242A
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- Prior art keywords
- circuit
- power supply
- harmonic
- suppressing
- industrial frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention discloses a method and a circuit for suppressing industrial frequency harmonic disturbance of an AC-DC (Alternating Current-Direct Current) power supply, and belongs to an AC-DC power supply module. The invention aims to solve the technical problem how to effectively reduce repeated harmonic noise generated by the AC-DC power supply module so as to enable a product to meet the requirements of the national military standard and meanwhile, avoid interference of reduction of quality of a power supply network to other current-using equipment. The invention adopts the technical scheme that the method for suppressing the industrial frequency harmonic disturbance of the AC-DC power supply comprises the following step of: (1) adding an active power factor correction circuit at the front end of the AC-DC power supply module so as to compensate current harmonic distortion caused by a capacitive load in the AC-DC power supply module and reduce repeated harmonic noise caused by current harmonic distortion. The circuit for suppressing the industrial frequency harmonic disturbance of the AC-DC power supply comprises an AC input module, a high-frequency filter, a harmonic suppressor, a rectifying circuit, the active power factor correction circuit and the AC-DC power supply module.
Description
Technical field
The present invention relates to a kind of AC-DC power module, specifically a kind of method for suppressing AC-DC power supply industrial frequency harmonic to be harassed and circuit thereof.
Background technology
AC-DC power module can make the device forming constant current in circuit, as dry cell, storage battery, DC generator etc., is called DC power supply.DC power supply has positive and negative two electrodes, and the electromotive force of positive pole is high, and the electromotive force of negative pole is low; When after two electrodes and circuit communication, DC power supply can maintain the constant potential difference between two electrodes, thus is formed in external circuit by the constant current of positive pole to negative pole.Make the electrical potential difference of DC power supply two interpolar keep the constant positive charge that must make to be flow to by positive pole negative pole in external circuit, in the direction of power source internal against electric field force, turn back to positive pole by negative pole.This process can not lean on electrostatic force, and " non-electrostatic force " that certain can only be leaned on contrary with electrostatic force direction realizes.
AC-DC power module, substantially be all after rectification, have a jumbo filter capacitor, reason due to this electric capacity makes its load characteristic present capacitive, alternating current 220V is when to AC-DC Power supply, due to the charge and discharge effect of filter capacitor, there is the ripple of sawtooth like ripple in the direct voltage at its two ends.On this filter capacitor, the minimum value of voltage is much larger than zero, is more or less the same with its maximum (ripple peak value).Due to the unilateral conduction of rectifier diode, when instantaneous AC input voltage is only higher than voltage on this filter capacitor, rectifier diode just can the conducting because of forward bias, and instantaneous AC input voltage lower than voltage on this filter capacitor time, rectifier diode ends because of reverse bias.So only within each half period of AC-input voltage near peak value, rectifier diode just can conducting.AC-input voltage still keeps sine waveform substantially, but AC input current is the spike of amplitude.The current waveform of this serious distortion contains a large amount of Resonance Wave Compositions, not only can cause line power factor degradation, and have a strong impact on whole supply network, disturbs other power consumption equipments on same supply network.
For reducing the high frequency E MI noise of itself, generally can not with power factor correction circuit when designing AC-DC power module, main cause has 2 points: one is that the high frequency E MI that can aggravate EMI Switching Power Supply itself disturbs, and increases design of filter difficulty; Two is to increase design difficulty and cost, but the AC-DC power module lacking power factor correction circuit will certainly cause product systems not meet harmonic wave conducted emission test requirement in national military standard.
How effectively can reduce AC-DC power module and produce multiple harmonic noise, make product meet military standard of China, avoid reducing supply network quality simultaneously, disturb other power consumption equipments to be the technical problems existed in prior art.
summary of the invention
Technical assignment of the present invention is for above weak point, provide that a kind of structure is simple, production cost is low, be easy to process, environmentally safe for the method that suppresses AC-DC power supply industrial frequency harmonic to be harassed and circuit thereof.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method for suppressing AC-DC power supply industrial frequency harmonic to be harassed, comprises the steps:
(1) active power factor circuit for rectifying is increased in AC-DC power module front end, compensate the current waveform distortion because capacitive load in AC-DC power module causes, reduce because current waveform distorts the multiple harmonic noise caused, improve the power factor of AC-DC power module, avoid interference other power consumption equipments in same supply network;
(2) increase rectification circuit in active power factor circuit for rectifying front end, become positive half cycle pulsating voltage after AC sine input full-bridge rectification, this positive half cycle pulsating voltage is as the power supply source of power factor correction circuit;
(3) harmonic shutter is increased in rectification circuit front end, for suppressing the issuable low-frequency noise of active power factor circuit for rectifying.
As preferably, described rectification circuit is bridge rectifier.
A kind of circuit for suppressing AC-DC power supply industrial frequency harmonic to be harassed, adopt the circuit of above-mentioned a kind of method design for suppressing AC-DC power supply industrial frequency harmonic to be harassed, comprise interchange input module, high frequency filter, harmonic shutter, rectification circuit, active power factor circuit for rectifying and AC-DC power module, described interchange input module is provided with L end, N end and PE end, wherein, L end is connected high frequency filter respectively with N end, PE end connects harmonic shutter, high frequency filter connects harmonic shutter, harmonic shutter connects rectification circuit, rectification circuit connects active power factor circuit for rectifying, active power factor circuit for rectifying connects AC-DC power module.Wherein, AC sine inputs, and by becoming positive half cycle pulsating voltage after rectification circuit full-bridge rectification, this positive half cycle pulsating voltage is as the power supply source of power factor correction circuit.Active power factor circuit for rectifying, by input current envelope following input voltage waveform, avoids multiple harmonic noise to produce.
As preferably, described active power factor circuit for rectifying comprises driving chip.
More preferably, described harmonic shutter comprises iron core inductor, and core inductances uses reactor unshakable in one's determination, and volume is little, few with copper.Non-linear due to ferromagnetic material, its inductance value is substantially constant when less by electric current, and can reduce when larger by electric current, and electric current and the non-linear relation of voltage.This non-linear for reducing, open air gap in iron circuit of being everlasting.
More preferably, described harmonic shutter is suitable for the noise of 25Hz-10KHz frequency range.
More preferably, described high frequency filter comprises common mode inductance, differential mode inductance and electric capacity.
More preferably, described high frequency filter is suitable for the noise of 10KHz-30MHz frequency range.
More preferably, described high frequency filter ground connection.One end of high frequency filter connects GND end, namely carries out grounding to high frequency filter.
Compared to the prior art a kind of method for suppressing AC-DC power supply industrial frequency harmonic to be harassed of the present invention and circuit thereof, have the following advantages:
1, the present invention is by increasing active power factor circuit for rectifying, compensate the current waveform distortion because capacitive load in AC-DC power module causes, reduce because current waveform distorts the multiple harmonic noise caused, improve the power factor of AC-DC power module, avoid interference other power consumption equipments in same supply network; Harmonic shutter is increased, for the low-frequency noise suppressing active power factor circuit for rectifying to produce in active power factor circuit for rectifying front end; Coordinated by active power factor circuit for rectifying and harmonic shutter (25Hz-10KHz) and high frequency filter (10KHzHz-30MHz), make product meet harmonic wave conducted emission test requirement in national military standard;
2, the present invention effectively can reduce the industrial frequency harmonic noise that whole product systems cause because of AC-DC power supply, makes product meet military standard of China.
As can be seen here, the present invention have reasonable in design, structure simple, be easy to the features such as processing, volume are little, easy to use, one-object-many-purposes, thus, have good value for applications.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Accompanying drawing 1 is a kind of structured flowchart of the circuit for suppressing AC-DC power supply industrial frequency harmonic to be harassed.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiment 1
A kind of method for suppressing AC-DC power supply industrial frequency harmonic to be harassed of the present invention, comprises the steps:
(1) active power factor circuit for rectifying is increased in AC-DC power module front end, compensate the current waveform distortion because capacitive load in AC-DC power module causes, reduce because current waveform distorts the multiple harmonic noise caused, improve the power factor of AC-DC power module, avoid interference other power consumption equipments in same supply network;
(2) increase rectification circuit in active power factor circuit for rectifying front end, become positive half cycle pulsating voltage after AC sine input full-bridge rectification, this positive half cycle pulsating voltage is as the power supply source of power factor correction circuit; Wherein, rectification circuit is bridge rectifier;
(3) harmonic shutter is increased in rectification circuit front end, for suppressing the issuable low-frequency noise of active power factor circuit for rectifying.
An active power factor circuit for rectifying is increased at AC-DC power module input, direct filter capacitor is not had for supply line, so active power factor circuit for rectifying is the load of purely resistive for what present supply line, avoid the current waveform distortion because capacitive load causes.The similar switching power circuit of active power factor circuit for rectifying operation principle, exchange input electricity by after a series of " switch " action of power factor correction circuit, its current waveform is interrupted, but its envelope is identical with voltage waveform, and envelope is identical with voltage waveform phase place.Active power factor circuit for rectifying front end increases bridge rectifier, exchange input electricity by becoming the positive half cycle voltage of pulsation after bridge rectifier, the positive half cycle voltage of this pulsation is as the power supply source of active power factor circuit for rectifying, active power factor circuit for rectifying becomes the direct current of half pulsation wave into high frequency and (is determined by power factor correction frequency, about 100KHz) " interchange " electricity, this high frequency " interchange " electricity will could be used by rear class PWM switching power supply through bridge rectifier again.With electric power system angle, this AC-DC power module has accomplished alternating voltage and alternating current homophase and voltage waveform and current waveform all meet sinusoidal waveform, has both solved power factor compensation problem, has again reduced low-frequency harmonics conduction interference.
Embodiment 2
As shown in Figure 1, a kind of circuit for suppressing AC-DC power supply industrial frequency harmonic to be harassed of the present invention, adopt the circuit of a kind of method design for suppressing AC-DC power supply industrial frequency harmonic to be harassed in embodiment 1, comprise interchange input module, high frequency filter, harmonic shutter, rectification circuit, active power factor circuit for rectifying and AC-DC power module, exchange on input module and be provided with L end, N end and PE end, wherein, L end is connected high frequency filter respectively with N end, PE end connects harmonic shutter, high frequency filter connects harmonic shutter, harmonic shutter connects rectification circuit, rectification circuit connects active power factor circuit for rectifying, active power factor circuit for rectifying connects AC-DC power module.Active power factor circuit for rectifying comprises driving chip.Harmonic shutter comprises iron core inductor.Harmonic shutter is suitable for the noise of 25Hz-10KHz frequency range.High frequency filter comprises common mode inductance, differential mode inductance and electric capacity.High frequency filter is suitable for the noise of 10KHz-30MHz frequency range.High frequency filter connects GND end, i.e. high frequency filter ground connection.
Active power factor circuit for rectifying is suppress industrial frequency harmonic harassing and wrecking basic, but owing to itself being also a kind of switching circuit, it is inevitable that its switching noise outwards conducts, and needs high frequency filter to disinthibite switch conduction noise; Active power factor circuit for rectifying can not accomplish that industrial frequency harmonic suppresses completely simultaneously, the harmonic shutter of low frequency is needed to go to make up, the present invention effectively can reduce AC-DC power module and produce multiple harmonic noise, avoids it to reduce supply network quality, disturbs other power consumption equipments.
Above-mentioned embodiment is only concrete case of the present invention; scope of patent protection of the present invention includes but not limited to above-mentioned embodiment; claims of any a kind of method for suppressing AC-DC power supply industrial frequency harmonic to be harassed according to the invention and any person of an ordinary skill in the technical field to its suitable change done or replacement, all should fall into scope of patent protection of the present invention.
By embodiment above, described those skilled in the art can be easy to realize the present invention.But should be appreciated that the present invention is not limited to two kinds of above-mentioned embodiments.On the basis of disclosed execution mode, described those skilled in the art can the different technical characteristic of combination in any, thus realizes different technical schemes.
Except the technical characteristic described in specification, be the known technology of those skilled in the art.
Claims (9)
1. the method for suppressing AC-DC power supply industrial frequency harmonic to be harassed, is characterized in that: comprise the steps:
(1) increase active power factor circuit for rectifying in AC-DC power module front end, compensate the current waveform distortion because capacitive load in AC-DC power module causes, reduce because current waveform distorts the multiple harmonic noise caused;
(2) increase rectification circuit in active power factor circuit for rectifying front end, become positive half cycle pulsating voltage after AC sine input rectification circuit, this positive half cycle pulsating voltage is as the power supply source of power factor correction circuit;
(3) harmonic shutter is increased in rectification circuit front end, for suppressing the issuable low-frequency noise of active power factor circuit for rectifying.
2. a kind of method for suppressing AC-DC power supply industrial frequency harmonic to be harassed according to claim 1, is characterized in that: described rectification circuit is bridge rectifier.
3. the circuit for suppressing AC-DC power supply industrial frequency harmonic to be harassed, it is characterized in that: the circuit adopting a kind of method design for suppressing AC-DC power supply industrial frequency harmonic to be harassed according to claim 1, comprise interchange input module, high frequency filter, harmonic shutter, rectification circuit, active power factor circuit for rectifying and AC-DC power module, described interchange input module is provided with L end, N end and PE end, wherein, L end is connected high frequency filter respectively with N end, PE end connects harmonic shutter, high frequency filter connects harmonic shutter, harmonic shutter connects rectification circuit, rectification circuit connects active power factor circuit for rectifying, active power factor circuit for rectifying connects AC-DC power module.
4. a kind of circuit for suppressing AC-DC power supply industrial frequency harmonic to be harassed according to claim 3, is characterized in that: described active power factor circuit for rectifying comprises driving chip.
5. a kind of circuit for suppressing AC-DC power supply industrial frequency harmonic to be harassed according to claim 4, is characterized in that: described harmonic shutter comprises iron core inductor.
6. a kind of circuit for suppressing AC-DC power supply industrial frequency harmonic to be harassed according to claim 5, is characterized in that: described harmonic shutter is suitable for the noise of 25Hz-10KHz frequency range.
7. a kind of circuit for suppressing AC-DC power supply industrial frequency harmonic to be harassed according to claim 6, is characterized in that: described high frequency filter comprises common mode inductance, differential mode inductance and electric capacity.
8. a kind of circuit for suppressing AC-DC power supply industrial frequency harmonic to be harassed according to claim 7, is characterized in that: described high frequency filter is suitable for the noise of 10KHz-30MHz frequency range.
9. a kind of circuit for suppressing AC-DC power supply industrial frequency harmonic to be harassed according to claim 8, is characterized in that: described high frequency filter ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610084698.9A CN105553242A (en) | 2016-02-14 | 2016-02-14 | Method and method for suppressing industrial frequency harmonic disturbance of AC-DC (Alternating Current-Direct Current) power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610084698.9A CN105553242A (en) | 2016-02-14 | 2016-02-14 | Method and method for suppressing industrial frequency harmonic disturbance of AC-DC (Alternating Current-Direct Current) power supply |
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| CN105553242A true CN105553242A (en) | 2016-05-04 |
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| CN201610084698.9A Pending CN105553242A (en) | 2016-02-14 | 2016-02-14 | Method and method for suppressing industrial frequency harmonic disturbance of AC-DC (Alternating Current-Direct Current) power supply |
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Cited By (1)
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| CN111193382A (en) * | 2018-10-25 | 2020-05-22 | Abb瑞士股份有限公司 | Power converter arrangement with attenuation element for electrical ringing |
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| CN201657475U (en) * | 2010-03-25 | 2010-11-24 | 刘水清 | Intelligent timing and dimming device for high-power low-frequency electrodeless lamp |
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