CN104092391B - Zero-loss rectifying circuit for induction electricity obtaining power supply - Google Patents
Zero-loss rectifying circuit for induction electricity obtaining power supply Download PDFInfo
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Abstract
The invention discloses a zero-loss rectifying circuit for an induction electricity obtaining power supply. The zero-loss rectifying circuit comprises a first diode, a second diode, a third diode and a fourth diode. In addition, the zero-loss rectifying circuit further comprises four MOSFETs correspondingly connected with the four diodes in parallel and a logic control module, wherein the logic control module comprises a signal voltage divider and a comparison circuit and controls connection and disconnection of all the MOSFETs so that the MOSFETs can replace the diodes correspondingly connected with the MOSFETs in parallel to serve as channels of rectification conversion signals under the connection state. The zero-loss rectifying circuit for the induction electricity obtaining power supply achieves zero rectification voltage drop, thereby achieving zero losses.
Description
Technical field
The present invention relates to a kind of power component circuit, more particularly, to a kind of rectification circuit.
Background technology
As a kind of power component circuit, it includes the bridge that four diodes are formed to rectification circuit, realizes input
The conversion of the direct current signal to output for the AC signal.
Within each work period of rectification circuit, the same time only has two diode operation, by the list of diode
To conducting function, AC signal is converted into unidirectional DC pulse signal.Because the pressure drop of diode itself is so that rectified current
Road inevitably produces certain loss during using, and especially obtains field, above-mentioned loss in energy conversion
The performance of whole circuit will be affected.Therefore, the loss reducing rectification circuit is a focus of energy harvesting area research.
Publication No. cn102468741a, publication date is in May, 2012 No. 23, the Chinese patent of entitled " rectification circuit "
Document discloses a kind of control method of rectification circuit, and when load current is less than reference current, rectification circuit is in underloading shape
State, control circuit reduces the switching frequency of on-off circuit, both can improve the underloading frequency reducing efficiency of power supply unit, can effectively subtract again
Ripple voltage component in this Output Voltage in Rectified Circuits few.
Publication No. cn102075102a, publication date is in May, 2011 No. 25, the China of entitled " bridge rectifier "
Patent document discloses a kind of rectification circuit, and two underarm diodes of rectifier bridge are replaced by it with n-channel mosfet, and pass through
Control circuit realizes the control of mesfet, thus the loss of rectifier bridge is reduced half.
Publication No. cn101626198, publication date is in January, 2010 No. 13, entitled " high efficiency active rectifying circuit "
Chinese patent literature disclose a kind of Half bridge rectifier circuit, it completes half-bridge circuit using mosfet, realizes relatively low loss.
For the rectification circuit in energy conversion field, its rectifier loss is more low better, these patent literary compositions therefore above-mentioned
Offer disclosed rectification circuit and also have improved space.
Content of the invention
It is an object of the invention to provide a kind of sensing power taking power supply is lost rectification circuit with zero, it enables zero rectification pressure
Fall, thus realize zero loss of rectification circuit.
To achieve these goals, the present invention proposes a kind of sensing power taking power supply with zero loss rectification circuit, for inciting somebody to action
Ac input signal rectifying conversion is direct-flow output signal, including the first diode, the second diode, the 3rd diode and the 4th
Diode, the negative pole of the wherein first diode is connected with the positive pole of the second diode, the negative pole of the second diode and the three or two pole
The negative pole of pipe is connected, and the positive pole of the 3rd diode is connected with the negative pole of the 4th diode, and the positive pole of the 4th diode is connected and the
The positive pole of one diode is connected, the negative pole connection ac input end of the negative pole of the wherein first diode and the 4th diode, and first
The negative pole of the positive pole of diode and the second diode connects DC output end；It also includes:
First mosfet, the 2nd mosfet, the 3rd mosfet and the 4th mosfet, its respectively with the first diode, second
Diode, the 3rd diode and the 4th diode are corresponding in parallel；
Logic control module, described Logic control module, according to the AC signal being received from ac input end, exports logic
Control signal is controlling the conducting of each mosfet and to block, so that each mosfet substitutes corresponding parallel connection in the state of conducting
Diode as rectifying conversion signal passage；Described Logic control module includes:
Signal divider, its input connects described ac input end, and ac input end is inputted by described signal divider
Alternating voltage partial pressure be available for the voltage that following comparison circuits are processed after export；
Comparison circuit, it is connected with the output end of signal divider, and it is defeated that described comparison circuit will be received from signal divider
The AC signal going out end is converted to control signal output；
First driver, the second driver, the 3rd driver and fourth drive, the input of described each driver all with
The output end of described comparison circuit connects, described first driver, the second driver, the 3rd driver and fourth drive defeated
Go out end respectively with a described mosfet, the 2nd mosfet, the 3rd mosfet and the 4th mosfet grid corresponding connect, export
Described logic control signal with the conducting of each mosfet of corresponding control respectively and blocks.
Sensing power taking power supply of the present invention is with zero loss rectification circuit, whole including the routine being formed by four diodes
Stream bridge, by will be corresponding in parallel respectively to four mosfet and described four diodes, thus form the four of the rectifier bridge of the present invention
Individual brachium pontis, is responsible for rectification in voltage over zero by diode, then controls mosfet to lead according to the conducting sequential of former diode
Logical, thus the conducting branches of a zero pressure drop are formed to replace former diode as the passage of rectifying conversion signal by mosfet,
Realize the zero energy loss of rectification circuit, improve the efficiency of whole rectification circuit.Specifically, sensing power taking of the present invention
Power supply is with, during zero loss rectification circuit work, receiving ac input signal from ac input end, rectified conversion is from direct current output
End output direct-flow output signal；Wherein, when ac input signal is positive half-wave, from rectifier bridge operation principle, the two or two pole
Pipe and the 4th diode current flow, now, Logic control module controls the 2nd mosfet and the 4th mosfet conducting, because it is considered as
Zero conduction voltage drop (conducting resistance only milliohm level), leads to the second diode and the cut-off of the 4th diode, now energy loss
Produce only on the 2nd mosfet and the 4th mosfet, and this device energy ezpenditure is considered as zero；In the same manner, ac input signal is negative
During half-wave, the first diode and the 3rd diode current flow, now, Logic control module controls a mosfet and the 3rd mosfet
Conducting, because it is considered as zero conduction voltage drop, leads to the first diode and the cut-off of the 3rd diode, now energy loss is only the
Produce on one mosfet and the 3rd mosfet, and this device energy ezpenditure is considered as zero.Described Logic control module is handed over by judgement
The positive and negative half-wave state of stream input signal be given corresponding logic control signal control four mosfet with four diode phases
Same conducting sequential conducting and cut-off, thus substitute diode as the passage of rectifying conversion signal；Wherein, comparison circuit receives
Ac input signal after signal divider partial pressure, according to the different level of different half-wave State- outputs, this level is through four
Driver generates the grid that final logic control signal controls four mosfet, thus controlling its conducting and ending.The present invention
During described sensing power taking power supply is lost rectifier circuit rectifies with zero, loss be instead of by the mosfet of zero loss higher
Diode is as the passage of rectifying conversion signal, thus realizing zero loss of rectification circuit.
Further, of the present invention sensing power taking power supply use zero loss rectification circuit in, described DC output end and
Logic control module connects, and thinks that Logic control module is powered.Due to DC output end output is direct current, therefore can profit
Powered for Logic control module with it.
Further, of the present invention sensing power taking power supply with zero loss rectification circuit also include dc source, its with
Logic control module connects, and thinks that Logic control module is powered.In order to reduce output loss to greatest extent, also can separately take direct current
Source powers for Logic control module.
Further, sensing power taking power supply of the present invention is with, in zero loss rectification circuit, described signal divider is extremely
Include first resistor and the second resistance being connected in series less, first resistor is connected to described exchange with second resistance after being connected in series
Input, the output end of described signal divider is connected between first resistor and second resistance.Described signal divider utilizes
The voltage divide function of resistant series carries out partial pressure to ac input signal.
Further, it is lost in rectification circuit with zero in sensing power taking power supply of the present invention, described comparison circuit bag
Include reverse comparator, the reverse input end of described reverse comparator connects the output end of signal divider, reverse comparator same
Connect benchmark signal to input, the output end of reverse comparator is the output end of described comparison circuit.
Further, in above-mentioned sensing power taking power supply with, in zero loss rectification circuit, described comparison circuit also includes the
Three resistance and the 4th resistance；One end of described 3rd resistor connects to the input in the same direction of reverse comparator, described 3rd resistor
The other end be connected to the output end of reverse comparator；One end of described 4th resistance is connected to the input in the same direction of reverse comparator
End, the other end ground connection of described 4th resistance.
Further, sensing power taking power supply of the present invention is lost in rectification circuit with zero, the grid of described mosfet
It is connected with resistance and source electrode between or between grid and drain electrode.This resistance plays pull-up or the effect of drop-down current potential.
Further, of the present invention sensing power taking power supply use zero loss rectification circuit in, a described mosfet with
4th mosfet is n-channel mosfet, and described 2nd mosfet and the 3rd mosfet is p-channel mosfet；First mosfet and
The drain electrode of the 2nd mosfet connects the first diode and the negative pole of the second diode, the leakage of the 3rd mosfet and the 4th mosfet respectively
Pole connects the positive pole of the 3rd diode and the 4th diode respectively；The source electrode of the first mosfet and the 2nd mosfet connects the one or two respectively
Pole pipe and the positive pole of the second diode, the source electrode of the 3rd mosfet and the 4th mosfet connects the 3rd diode and the four or two pole respectively
The negative pole of pipe.
Further, above-mentioned sensing power taking power supply is lost in rectification circuit with zero, a described mosfet and the 3rd
It is connected to resistance between the grid of mosfet and drain electrode, divide between the grid of the 2nd mosfet and the 4th mosfet and source electrode
It is not connected with resistance.
Sensing power taking power supply disclosed by the invention zero loss rectification circuit is due to employing above technical scheme so that whole
The rectification pressure drop of current circuit is zero, so that the loss of rectification circuit is zero.
Brief description
Fig. 1 is a kind of sensing power taking power supply of the present invention zero loss circuit under embodiment for the rectification circuit
Figure.
Fig. 2 is a kind of sensing power taking power supply of the present invention zero loss logic control under embodiment for the rectification circuit
The circuit diagram of molding block.
Specific embodiment
Below in conjunction with Figure of description and specific embodiment, sensing power taking power supply of the present invention is lost with zero
Rectification circuit makes further explanation and explanation.
Fig. 1 illustrates a kind of sensing power taking power supply of the present invention zero loss electricity under embodiment for the rectification circuit
Road.
As shown in figure 1, the sensing power taking power supply of the present embodiment is lost rectification circuit with zero, comprising: four diodes, respectively
It is the first diode d1, the second diode d2, the 3rd diode d3 and the 4th diode d4；Four mosfet, are respectively
One mosfet t1, the 2nd mosfet t2, the 3rd mosfet t3 and the 4th mosfet t4；Four resistance r1, r2, r3 and
r4.Its annexation is as shown in figure 1, diode d1, d2, d3 and d4 form conventional rectification circuit；In+ with in- is defeated for exchanging
Enter signal, vcc and gnd is direct-flow output signal；Mosfet t2 and t3 of p-channel is in parallel with diode d2 and d3 respectively, n ditch
Mosfet t1 and t4 in road is in parallel with diode d1 and d4 respectively；The power supply of Logic control module u is by the output of rectification circuit
Vcc and gnd provides, four logic control signal output ends g1, g2, g3 and g4 respectively with mosfet t1, t2, t3 and t4
Grid be connected, the grid voltage of mosfet is respectively vg1, vg2, vg3 and vg4, and source voltage is respectively vs1, vs2, vs3
And vs4, drain voltage respectively vd1, vd2, vd3 and vd4, resistance r2 and r3 is respectively the pull-up of mosfet t2 and t3
Resistance, when gate control levels are for tri-state, grid voltage is pulled to source voltage, resistance r1 and r4 is respectively mosfet
The pull down resistor of t1 and t4, when gate control levels are for tri-state, grid voltage is pulled down to drain voltage；Logic control module
U real-time detection ac input signal in+ and in-, according to ac input signal phase place routinely under rectification circuit diode lead
Logical sequential selects different mosfet conductings, so that each mosfet substitutes the diode of corresponding parallel connection in the state of conducting
As the passage of rectifying conversion signal, thus realizing the low-loss rectification to ac input signal in+ and in-, output direct current is defeated
Go out signal vcc and gnd.
Fig. 2 illustrates sensing power taking power supply of the present invention and a kind of rectification circuit patrolling under embodiment is lost with zero
Collect the circuit structure of control module.
As shown in Fig. 2 the Logic control module u of the present embodiment includes: signal divider, reverse comparison circuit and four
Driver g1, g2, g3 and g4, wherein signal divider include first resistor r5 and second resistance r6 connected, and reversely compare
Circuit includes reverse comparator u1, resistance r7 and resistance r8.As schemed, ac input signal in+ and in- connects series connection to connected mode
R5 and r6 two ends, g1, g2, g3 and g4 be respectively four drivers g1, g2, g3 and g4 output end.Additionally, vcc
With gnd be reverse comparator and driver provides power supply.Resistance r5 and r6 constitutes signal divider, by ac input signal in
+ the voltage and in- between becomes the voltage levvl being available for that reverse comparator u1 is processed, and resistance r5 mono- terminates in+, other end
It is connected with resistance r6, is concurrently accessed the reverse input end of reverse comparator u1, the other end of resistance r6 meets in-, resistance r7,
R8 and reverse comparator u1 constitutes reverse comparison circuit, and resistance r8 mono- terminates gnd, and other end is connected with resistance r7, simultaneously
It is linked into the input in the same direction of reverse comparator u1, the other end of resistance r7 is connected with the output of reverse comparator u1.Take r8 >
> so that benchmark is approximately zero, ac input signal in+ and in- is converted into pulse output letter to r7 by reverse comparator u1
Number, it is respectively connected to the input of four drivers g1, g2, g3 and g4；Driver has input and output end, wherein,
When driver input end input signal is gnd, driver g1 and g3 is output as tri-state, and driver g2 and g4 is output as
gnd；When driver input end input signal is vcc, driver g1 and g3 is output as gnd, the output of driver g2 and g4
For tri-state.Four output ends g1, g2 of driver g1, g2, g3 and g4, g3 and g4 are whole Logic control module u's
Output end.
The specific work process of the present embodiment is incorporated by reference to reference to Fig. 1 and Fig. 2:
When ac input signal in+ and in- is positive half-wave, i.e. vin+ > vcc > gnd > vin-, reverse comparator u1's
Reverse input end signal is just, is output as gnd, the input input signal of four drivers g1, g2, g3 and g4 is gnd, drives
Output g1 and g3 of dynamic device g1 and g3 is tri-state, and output g2 and g4 of driver g2 and g4 is gnd.For mosfet t1, due to
G1 is tri-state, and vg1 is pulled down to vin+, so t1 is not turned on；For mosfet t2, because g2 is gnd, vg2=gnd, vs2=
Vin+, and vin+ > gnd, therefore t2 conducting；For mosfet t3, because g3 is tri-state, therefore vg3 is pulled to vin-, institute
It is not turned on t3；For t4, because g4 is gnd, vg4=gnd, vd4=vin-, gnd > vin-, therefore t4 conducting；Now believe
Number path is in+-t2-vcc-gnd-t4-in-.
When ac input signal in+ and in- is negative half-wave, i.e. vin- > vcc > gnd > vin+, reverse comparator u1's
Reverse input end signal is negative, is output as vcc, the input input signal of four drivers g1, g2, g3 and g4 is vcc, drives
Output g1 and g3 of dynamic device g1 and g3 is gnd, and output g2 and g4 of driver g2 and g4 is tri-state.For mosfet t1, due to
G1 is gnd, vg1=gnd, vd1=vin+, gnd > vin+, therefore t1 conducting；For mosfet t2, because g2 is tri-state, therefore
Vg2 is pulled down to vin+, and t2 is not turned on；For mosfet t3, because g3 is gnd, vg3=gnd, vd3=vin-, vin- >
Gnd, therefore t3 turn on；For mosfet t4, because g4 is tri-state, therefore vg4 is pulled to vin-, and t4 is not turned on it.Now
Signal path is in--t3-vcc-gnd-t1-in+.
When being turned on due to mosfet t2 and t4 or t3 and t1, conducting resistance is only milliohm rank, and therefore loss is considered as
Zero.As can be seen here, there is corresponding mosfet conducting in the range of the positive and negative half-wave of ac input signal in+ and in-, it is minimum
Conducting resistance make the pressure drop of rectification circuit and loss be zero.
It should be noted that listed above is only the specific embodiment of the present invention it is clear that the invention is not restricted to above enforcement
Example, has the similar change of many therewith.If those skilled in the art directly derives from present disclosure or joins
The all deformation expected, all should belong to protection scope of the present invention.
Claims (7)
1. a kind of sensing power taking power supply is lost rectification circuit with zero, for being that direct current output is believed by ac input signal rectifying conversion
Number, including the first diode, the second diode, the 3rd diode and the 4th diode, the negative pole of the wherein first diode and
The positive pole of two diodes is connected, and the negative pole of the second diode is connected with the negative pole of the 3rd diode, the positive pole of the 3rd diode and
The negative pole of the 4th diode is connected, and the positive pole of the 4th diode is connected and is connected with the positive pole of the first diode, the wherein the 1st pole
The negative pole of the negative pole of pipe and the 4th diode connects ac input end, and the negative pole of the positive pole of the first diode and the second diode is even
Connect DC output end；It is characterized in that, also include:
First mosfet, the 2nd mosfet, the 3rd mosfet and the 4th mosfet, its respectively with the first diode, the two or two pole
Pipe, the 3rd diode and the 4th diode are corresponding in parallel；In voltage over zero, rectification is responsible for by diode；
Logic control module: Logic control module provides corresponding logic by the positive and negative half-wave state judging ac input signal
Control signal controls four mosfet to turn on sequential conducting with four diode identicals and to end, thus by mosfet shape
The conducting branches becoming a zero pressure drop are to replace former diode as the passage of rectifying conversion signal；Described Logic control module bag
Include:
Signal divider, its input connects described ac input end, the friendship that ac input end is inputted by described signal divider
Stream voltage is to be available for output after the voltage that following comparison circuits are processed；
Comparison circuit, it is connected with the output end of signal divider, and described comparison circuit will be received from signal divider output end
AC signal be converted to control signal output；
First driver, the second driver, the 3rd driver and fourth drive, the input of described each driver all with described
The output end of comparison circuit connects, described first driver, the output end of the second driver, the 3rd driver and fourth drive
Respectively with a described mosfet, the 2nd mosfet, the 3rd mosfet and the 4th mosfet grid corresponding connect, output is described
Logic control signal with the conducting of each mosfet of corresponding control respectively and blocks.
2. sensing power taking power supply as claimed in claim 1 uses zero rectification circuit to be lost it is characterised in that described DC output end
It is connected with Logic control module, think that Logic control module is powered.
3. sensing power taking power supply as claimed in claim 1 zero loss rectification circuit is it is characterised in that also include direct current
Source, it is connected with Logic control module, thinks that Logic control module is powered.
4. sensing power taking power supply as claimed in claim 1 uses zero rectification circuit to be lost it is characterised in that described signal divider
At least include first resistor and the second resistance being connected in series, first resistor and second resistance are connected to described friendship after being connected in series
Stream input, the output end of described signal divider is connected between first resistor and second resistance.
5. sensing power taking power supply as claimed in claim 1 uses zero rectification circuit to be lost it is characterised in that described comparison circuit bag
Include reverse comparator, the reverse input end of described reverse comparator connects the output end of signal divider, reverse comparator same
Connect benchmark signal to input, the output end of reverse comparator is the output end of described comparison circuit.
6. sensing power taking power supply as claimed in claim 1 uses zero rectification circuit to be lost it is characterised in that the grid of described mosfet
It is connected with resistance between pole and source electrode or between grid and drain electrode.
7. sensing power taking power supply as claimed in claim 1 uses zero rectification circuit to be lost it is characterised in that described first
The source electrode of mosfet and the 2nd mosfet connects the first diode and the negative pole of the second diode respectively, the 3rd mosfet and
The source electrode of the 4th mosfet connects the positive pole of the 3rd diode and the 4th diode respectively；First mosfet and second
The drain electrode of mosfet connects the first diode and the positive pole of the second diode respectively, the 3rd mosfet's and the 4th mosfet
Drain electrode connects the negative pole of the 3rd diode and the 4th diode respectively.
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| CN201410354831.9A CN104092391B (en) | 2014-07-24 | 2014-07-24 | Zero-loss rectifying circuit for induction electricity obtaining power supply |
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| CN201410354831.9A CN104092391B (en) | 2014-07-24 | 2014-07-24 | Zero-loss rectifying circuit for induction electricity obtaining power supply |
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| CN110274630A (en) * | 2019-07-02 | 2019-09-24 | 凯铭诺(深圳)科技有限公司 | A kind of low-voltage distributing line branch monitoring device and its monitoring method |
| CN110492768A (en) * | 2019-08-13 | 2019-11-22 | 苏州格远电气有限公司 | Rectifier circuit |
| CN110932573B (en) * | 2019-12-18 | 2020-12-08 | 科大智能电气技术有限公司 | Power-taking rectifying and protecting circuit |
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| SK287977B6 (en) * | 2008-05-16 | 2012-08-06 | Jaroslav Dudrik | Lossless circuit for reducing disconnecting losses in indirect one-way convertor with output controlled rectifier |
| CN102075102B (en) * | 2011-02-24 | 2013-05-15 | 成都芯源系统有限公司 | bridge rectifier circuit |
| CN202872622U (en) * | 2012-08-08 | 2013-04-10 | 能极电源(深圳)有限公司 | High-efficiency bridge type rectification driving control circuit |
| CN103475241B (en) * | 2013-10-13 | 2016-11-23 | 西安电子科技大学 | Self-driven full-bridge synchronous rectification circuit |
| CN203951380U (en) * | 2014-07-24 | 2014-11-19 | 国家电网公司 | A kind of induction power taking zero loss rectification circuit for power supply |
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