CN102244461A - Leakage circuit and method for reducing power consumption of electromagnetic interference filer - Google Patents
Leakage circuit and method for reducing power consumption of electromagnetic interference filer Download PDFInfo
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- CN102244461A CN102244461A CN201010169797XA CN201010169797A CN102244461A CN 102244461 A CN102244461 A CN 102244461A CN 201010169797X A CN201010169797X A CN 201010169797XA CN 201010169797 A CN201010169797 A CN 201010169797A CN 102244461 A CN102244461 A CN 102244461A
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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
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Abstract
The invention discloses a leakage circuit and method for reducing power consumption of an electromagnetic interference filer. An AC (alternating current) power supply connected with the electromagnetic interference filer is rectified to generate full-wave signals; and the full-wave signals control a leakage switch to build or cut off a leakage path. The leakage circuit and method can cut off the leakage path during the AC power supply supplies power, thereby reducing the power consumption of a leakage resistor.
Description
Technical field
The present invention relates to a kind of electromagnetic interference (Electro-Magnetic Interference; EMI) filter is particularly about a kind of leadage circuit and method that reduces the power consumption of Electromagnetic interference filter.
Background technology
In recent years, because of energy crisis and environmental protection notion new line, relevant environmental protection rules are stipulated to electronic equipment one after another in zones such as European Union, North America and Japan, except that the conversion efficiency of regulation electronic equipment, also unloaded standby energy consumption are proposed to be strict with.As shown in Figure 1, be applied in the Electromagnetic interference filter 12 of power supply equipment, pull out the back and cause plug long charged in order to prevent attaching plug because of the electric charge that its capacitor C x stores, thereby use bleeder resistance (bleeding resistor) R1 shunt capacitance Cx with its electric charge of releasing, make Electromagnetic interference filter 12 meet safety.For example CEI/IEC 60950-1clause 2.1.1.7 stipulates, the discharge time constant of capacitor C x and bleeder resistance R1 (time constant) need be less than 1 second.Usually bleeder resistance R1 is 2M Ω, and its power consumption is 4～35mW.As long as AC power AC power supply, bleeder resistance R1 is consumed energy always.When system standby, the power consumption of bleeder resistance R1 more duty is carried the standby energy consumption quite great proportion.
Summary of the invention
One of purpose of the present invention is to provide a kind of leadage circuit and method that reduces the power consumption of Electromagnetic interference filter.
According to the present invention, a kind of leadage circuit that reduces the power consumption of Electromagnetic interference filter comprises rectification circuit and connects the AC power that this Electromagnetic interference filter connects, the bleeder resistance and the switch series of releasing are coupled between this rectification circuit and the earth terminal, be used for setting up or cutting off the path of releasing, and circuit for detecting is according to this switch of releasing of all-wave signal controlling of this rectification circuit generation.
According to the present invention, a kind of drainage method that reduces the power consumption of Electromagnetic interference filter comprises AC power rectification that this Electromagnetic interference filter is connected producing the all-wave signal, and releases switch to set up or to cut off the path of releasing according to this all-wave signal controlling.
Description of drawings
Fig. 1 is existing Electromagnetic interference filter;
Fig. 2 is according to embodiments of the invention; And
Fig. 3 is the oscillogram of the circuit of Fig. 2.
Embodiment
Below in conjunction with Figure of description the specific embodiment of the present invention is done detailed description.
Fig. 2 is according to embodiments of the invention, with the bleeder resistance R1 among leadage circuit 14 replacement Fig. 1, it comprises bleeder resistance R2 and the switch SW of releasing is series between rectification circuit 16 and the earth terminal, when the switch SW of releasing is closed circuit, set up the path of releasing, when releasing the switch SW open circuit, cut off the path of releasing.When AC power AC powers, two diode D1, the D2s of the cross-pressure Vx of capacitor C x in rectification circuit 16 are rectified into the all-wave signal, and circuit for detecting 18 relatively produces comparison signal S1 with the all-wave signal Vd and the reference voltage Vref of this all-wave signal after voltage divider 20 dividing potential drops in comparator 22.If all-wave signal Vd is higher than reference voltage Vref, then comparison signal S1 is a high levle, otherwise, then be low level.Detecting controller 24 is according to comparison signal S1 controlled discharge switch SW, with when the release electric charge of electric capacity Cx of controlled discharge resistance R 2, thereby reduces the loss that bleeder resistance R2 causes, and then reduces unloaded standby energy consumption.
Fig. 3 is the oscillogram of the circuit of Fig. 2.When AC power AC powers, the comparison signal S1 that all-wave signal Vd and reference voltage Vref relatively obtain can continue to switch between high low level, its time in high levle is T1, and the switch SW of releasing during this period is open circuit, so bleeder resistance R2 is equal to and does not exist.After AC power AC is removed, if all-wave signal Vd is higher than reference voltage Vref, detecting controller 24 surpasses time of delay during T2 in the time that comparison signal S1 is in high levle, the conducting switch SW of releasing makes the bleeder resistance R2 electric charge of electric capacity Cx of releasing, thereby the requirement that the discharge time constant of capacitor C x and bleeder resistance R2 was less than 1 second.Time of delay, T2 can set according to safety, released the time with decision.Reach the detecting controller 24 of above-mentioned functions, its circuit is very simple, only needs one to go up number or following number timer, and this is those skilled in the art scholar's well known.The preferably, this timer is a programmable.
More than; only be preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range that claim was defined.
Claims (8)
1. leadage circuit that reduces the power consumption of Electromagnetic interference filter, this Electromagnetic interference filter has electric capacity and is connected between the two ends of AC power, it is characterized in that, and this leadage circuit comprises:
Rectification circuit is connected between the two ends of this AC power, to produce the all-wave signal;
The bleeder resistance and the switch series of releasing are coupled between this rectification circuit and the earth terminal; And
Circuit for detecting connects this rectification circuit and the switch of releasing, according to this switch of releasing of this all-wave signal controlling.
2. leadage circuit as claimed in claim 1 is characterized in that this rectification circuit comprises two diodes.
3. leadage circuit as claimed in claim 1 is characterized in that, this circuit for detecting comprises:
Voltage divider connects this rectification circuit, with this all-wave signal dividing potential drop;
Comparator connects this voltage divider, and relatively all-wave signal and the reference voltage after this dividing potential drop produces comparison signal according to this; And
The detecting controller connects this comparator, produces control signal according to this comparison signal and switches this switch of releasing.
4. leadage circuit as claimed in claim 3 is characterized in that, this detecting controller calculates the time that this comparison signal is kept high levle, determines this control signal according to this.
5. leadage circuit as claimed in claim 4 is characterized in that, this detecting controller comprises timer to determine this control signal.
6. a drainage method that reduces the power consumption of Electromagnetic interference filter is characterized in that, this Electromagnetic interference filter has electric capacity and is connected between the two ends of AC power, and this drainage method comprises:
(A) to this AC power rectification to produce the all-wave signal; And
(B) release switch to set up or to cut off the path of releasing according to this all-wave signal controlling.
7. drainage method as claimed in claim 6 is characterized in that, this step B comprises:
With this all-wave signal dividing potential drop;
Relatively all-wave signal after this dividing potential drop and reference voltage are to produce comparison signal; And
Produce control signal according to this comparison signal, in order to do bleeder resistance ground connection is set up this path of releasing.
8. drainage method as claimed in claim 7 is characterized in that, more comprises this comparison signal of calculating and keeps the time of high levle to determine this control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010169797XA CN102244461A (en) | 2010-05-12 | 2010-05-12 | Leakage circuit and method for reducing power consumption of electromagnetic interference filer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010169797XA CN102244461A (en) | 2010-05-12 | 2010-05-12 | Leakage circuit and method for reducing power consumption of electromagnetic interference filer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102244461A true CN102244461A (en) | 2011-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010169797XA Pending CN102244461A (en) | 2010-05-12 | 2010-05-12 | Leakage circuit and method for reducing power consumption of electromagnetic interference filer |
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| CN (1) | CN102244461A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187861A (en) * | 2011-12-28 | 2013-07-03 | 立锜科技股份有限公司 | Self-discharge bleeder circuit, method, bleeder integrated circuit device and AC/DC interface |
| CN103516187A (en) * | 2012-06-19 | 2014-01-15 | 立锜科技股份有限公司 | Bleeder circuit and method for reducing power consumption of electromagnetic interference filter |
| CN103973106A (en) * | 2013-01-30 | 2014-08-06 | 仁宝电脑工业股份有限公司 | Power supply system with pulse signal generator |
| CN105407595A (en) * | 2015-11-16 | 2016-03-16 | 江苏力行电力电子科技有限公司 | Capacitance-resistance leakage circuit and light emitting diode (LED) driving circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004289893A (en) * | 2003-03-19 | 2004-10-14 | Sharp Corp | Power-factor improving circuit |
| JP2006204028A (en) * | 2005-01-21 | 2006-08-03 | Matsushita Electric Ind Co Ltd | Direct-current power supply unit |
| CN101051751A (en) * | 2007-05-14 | 2007-10-10 | 上海艾帕电力电子有限公司 | Active power filter including power unit and its control method |
| CN101714831A (en) * | 2009-06-03 | 2010-05-26 | 崇贸科技股份有限公司 | A startup circuit about a discharging electromagnetic interference filter for power saving for a power supply apparatus |
-
2010
- 2010-05-12 CN CN201010169797XA patent/CN102244461A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004289893A (en) * | 2003-03-19 | 2004-10-14 | Sharp Corp | Power-factor improving circuit |
| JP2006204028A (en) * | 2005-01-21 | 2006-08-03 | Matsushita Electric Ind Co Ltd | Direct-current power supply unit |
| CN101051751A (en) * | 2007-05-14 | 2007-10-10 | 上海艾帕电力电子有限公司 | Active power filter including power unit and its control method |
| CN101714831A (en) * | 2009-06-03 | 2010-05-26 | 崇贸科技股份有限公司 | A startup circuit about a discharging electromagnetic interference filter for power saving for a power supply apparatus |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187861A (en) * | 2011-12-28 | 2013-07-03 | 立锜科技股份有限公司 | Self-discharge bleeder circuit, method, bleeder integrated circuit device and AC/DC interface |
| CN103516187A (en) * | 2012-06-19 | 2014-01-15 | 立锜科技股份有限公司 | Bleeder circuit and method for reducing power consumption of electromagnetic interference filter |
| CN103973106A (en) * | 2013-01-30 | 2014-08-06 | 仁宝电脑工业股份有限公司 | Power supply system with pulse signal generator |
| CN105407595A (en) * | 2015-11-16 | 2016-03-16 | 江苏力行电力电子科技有限公司 | Capacitance-resistance leakage circuit and light emitting diode (LED) driving circuit |
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Application publication date: 20111116 |