CN206293950U - The circuit of synchronous rectification of line loss compensation - Google Patents
The circuit of synchronous rectification of line loss compensation Download PDFInfo
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- CN206293950U CN206293950U CN201621150044.3U CN201621150044U CN206293950U CN 206293950 U CN206293950 U CN 206293950U CN 201621150044 U CN201621150044 U CN 201621150044U CN 206293950 U CN206293950 U CN 206293950U
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- line loss
- loss compensation
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- 239000004065 semiconductor Substances 0.000 claims abstract description 36
- 230000005611 electricity Effects 0.000 claims description 10
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- 230000009466 transformation Effects 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
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- 238000004134 energy conservation Methods 0.000 description 1
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Abstract
The utility model discloses a kind of circuit of synchronous rectification of line loss compensation, its connection transformer, including rectification unit and Commutation control unit, described rectification unit one end is electrically connected with the first output end of transformer, second output end of the rectification unit other end and transformer is connected with load unit, the rectification unit is provided with metal-oxide-semiconductor, the drain electrode of the metal-oxide-semiconductor is electrically connected with the first output end of transformer, the source electrode of the metal-oxide-semiconductor is electrically connected with load unit, and the source electrode and grid of the metal-oxide-semiconductor are electrically connected with Commutation control unit respectively.The utility model reduces power consumption by setting rectification unit between transformer and Commutation control unit using the conducting resistance of metal-oxide-semiconductor, so as to improve the purpose that efficiency reaches carbon reduction；Meanwhile, the line loss compensation end set using chip unit is electrically connected with the 9th resistance, and the electric wire wire that load unit is compensated by adjusting the resistance of the 9th resistance hinders produced pressure drop, with the input voltage value needed for proof load unit.
Description
Technical field
The utility model is related to charging circuit technical field, more particularly, to a kind of circuit of synchronous rectification of line loss compensation.
Background technology
As shown in figure 1, presently used charging circuit includes primary source unit and secondary power unit, wherein, it is secondary
Power subsystem major part all carries out rectification regulation using diode, if under the load condition of high current, can produce conducting
Loss W=Vf* I, and can there is obvious voltage differences V=R*I in line end, so as to influence the electric property of charger and fill
Electrical efficiency, is unfavorable for effective popularization of product, wherein, VfIt is the forward conducting voltage of diode, I is the electric current for flowing through load
Value, R is conductor wire resistance value.
Utility model content
Based on this, it is necessary to for the problem that above-mentioned background technology is present, there is provided a kind of synchronous rectification electricity of line loss compensation
Road, reduce loss improves the purpose that efficiency reaches carbon reduction, it is not necessary to which increasing multicomponent device can reach line loss compensation.
To achieve the above object, the utility model discloses a kind of circuit of synchronous rectification of line loss compensation, its connection transformation
Device, including rectification unit and Commutation control unit, described rectification unit one end are electrically connected with the first output end of transformer, institute
The second output end for stating the rectification unit other end and transformer is connected with load unit, and the rectification unit is provided with metal-oxide-semiconductor, institute
First output end of the drain electrode and transformer of stating metal-oxide-semiconductor is electrically connected with, and source electrode and the load unit of the metal-oxide-semiconductor are electrically connected with,
The source electrode and grid of the metal-oxide-semiconductor are electrically connected with Commutation control unit respectively.
Wherein in one embodiment, also including line loss compensation unit, the Commutation control unit is provided with chip unit,
The chip unit is provided with earth terminal, switch terminals, sense terminal, control end, voltage input end and line loss compensation end, the MOS
The source electrode of pipe is electrically connected with the earth terminal of chip unit, and the grid of the metal-oxide-semiconductor is electrically connected with the control end of chip unit,
It is electrically connected with voltage-regulator diode between the earth terminal and control end of the chip unit, the sense terminal of the chip unit is by the
One resistance and second resistance are electrically connected with the first output end of transformer, and the first resistor two ends are parallel with the first electric capacity；
The voltage input end of the chip unit is electrically connected with the second output end of transformer, and the second of the transformer is defeated
Go out between end and the source electrode of metal-oxide-semiconductor and be electrically connected with 3rd resistor and the 4th resistance, the 3rd resistor and the 4th resistant series
Set, the switch terminals of the chip unit are electrically connected between 3rd resistor and the 4th resistance；The line loss compensation unit with
The line loss compensation end of chip unit is electrically connected with.
Wherein in one embodiment, the line loss compensation unit includes the 9th resistance, the tenth resistance and the 5th electric capacity, institute
The line loss compensation end that the 9th resistance one end is electrically connected at chip unit is stated, the 9th resistance other end is electrically connected with
Ten resistance one end and the 5th electric capacity one end, the tenth resistance other end are electrically connected between the 7th resistance and the 8th resistance, institute
State the 5th electric capacity other end ground connection；The electric wire wire that load unit is compensated by adjusting the resistance of the 9th resistance hinders produced pressure
Drop, with the input voltage value needed for proof load unit.
Wherein in one embodiment, the load unit includes the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electricity
Resistance, the 6th resistance, the 7th resistance, the 8th resistance, photoelectrical coupler and controllable accurate source of stable pressure, second electric capacity and the 3rd electricity
Appearance be electrically connected between second output end and the source electrode of metal-oxide-semiconductor of transformer, described 5th resistance one end and the 7th electricity
Resistance one end is electrically connected with the second output end of transformer, and the 5th resistance other end electrically connects with photoelectrical coupler one end
Connect, the 7th resistance other end and the 8th resistance one end are electrically connected with, the 8th resistance other end and controllable accurate voltage stabilizing
The anode tap ground connection in source, the reference edge of described 6th resistance one end and controllable accurate source of stable pressure is electrically connected at the 7th resistance and the
Between eight resistance, the 6th resistance other end connects the 4th electric capacity one end, and the 4th electric capacity other end and controllable accurate are steady
The cathode terminal of potential source is electrically connected with the photoelectrical coupler other end.
Wherein in one embodiment, the controllable accurate source of stable pressure is TL431 chip structures.
Wherein in one embodiment, the chip model of the chip unit is LD8520.
In sum, the circuit of synchronous rectification of the utility model line loss compensation by transformer and Commutation control unit it
Between rectification unit is set, power consumption is reduced using the conducting resistance of metal-oxide-semiconductor, so as to improve the purpose that efficiency reaches carbon reduction；
Meanwhile, the line loss compensation end set using chip unit is electrically connected with the 9th resistance, is mended by adjusting the resistance of the 9th resistance
The pressure drop produced by the electric wire wire resistance of load unit is repaid, with the input voltage value needed for proof load unit.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of traditional diode charge circuit；
Fig. 2 is a kind of schematic block circuit diagram of embodiment of circuit of synchronous rectification of the utility model line loss compensation；
Fig. 3 is the circuit theory diagrams of the circuit of synchronous rectification of the utility model line loss compensation.
Specific embodiment
As shown in Figures 2 and 3, circuit of synchronous rectification one end connection transformer 100 of the utility model line loss compensation, its bag
Include rectification unit 200, Commutation control unit 300 and line loss compensation unit 400, the one end of the rectification unit 200 and transformer 100
The first output end be electrically connected with, it is single that the second output end of the other end of the rectification unit 200 and transformer 100 is connected with load
Unit 500, the rectification unit 200 is provided with the drain electrode of metal-oxide-semiconductor Q1, the metal-oxide-semiconductor Q1 and the first output end electricity of transformer 100
Property connection, source electrode and the load unit 500 of the metal-oxide-semiconductor Q1 be electrically connected with, the source electrode and grid of the metal-oxide-semiconductor Q1 respectively with it is whole
Flow control unit 300 is electrically connected with, and the Commutation control unit 300 is controlled regulation to the on off operating mode of metal-oxide-semiconductor Q1.
Specifically, the Commutation control unit 300 is provided with chip unit U1, the chip unit U1 and is provided with earth terminal
GND, switch terminals DRV, sense terminal SYN, control end ENDT, voltage input end VCC and line loss compensation end LREG, the metal-oxide-semiconductor Q1
The earth terminal GND of source electrode and chip unit U1 be electrically connected with, the grid of the metal-oxide-semiconductor Q1 and the control end of chip unit U1
ENDT is electrically connected with, and voltage-regulator diode D1, institute are electrically connected between the earth terminal GND and control end ENDT of the chip unit U1
The sense terminal SYN for stating chip unit U1 is electrical with the first output end of transformer 100 by first resistor R1 and second resistance R2
Connection, the first resistor R1 two ends are parallel with the first electric capacity C1.
The voltage input end VCC of the chip unit U1 is electrically connected with the second output end of transformer 100, the transformer
3rd resistor R3 and the 4th resistance R4, the 3rd electricity are electrically connected between 100 the second output end and the source electrode of metal-oxide-semiconductor Q1
Resistance R3 and the 4th resistance R4 is arranged in series, and the switch terminals DRV of the chip unit U1 is electrically connected at 3rd resistor R3 and the 4th
Between resistance R4.
Wherein in one embodiment, the chip model of the chip unit U1 is LD8520.
The load unit 500 includes the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th resistance R5, the 6th electricity
Resistance R6, the 7th resistance R7, the 8th resistance R8, photoelectrical coupler D2 and controllable accurate source of stable pressure U2, the second electric capacity C2 and the
Three electric capacity C3 are electrically connected between the second output end of transformer 100 and the source electrode of metal-oxide-semiconductor Q1, the 5th resistance R5
One end and the 7th resistance R7 one end are electrically connected with the second output end of transformer 100, the 5th resistance R5 other ends with
Photoelectrical coupler D2 one end is electrically connected with, the electric connection of the 7th resistance R7 other ends and the 8th resistance R8 one end, and described the
The anode tap ground connection of the eight resistance R8 other ends and controllable accurate source of stable pressure U2, described 6th resistance R6 one end and controllable accurate voltage stabilizing
The reference edge of source U2 is electrically connected between the 7th resistance R7 and the 8th resistance R8, the 6th resistance R6 other ends connection the 4th
The cathode terminal of electric capacity C4 one end, the 4th electric capacity C4 other ends and controllable accurate source of stable pressure U2 is electrically connected with photoelectrical coupler D2
The other end；Wherein, controllable accurate source of stable pressure U2 is TL431 chip structures.
Specifically, the control end ENDT voltages >=2V of the chip unit U1 can just start working, and to chip unit U1
Startup, close or output short-circuit protected, in voltage input end VCC >=UVLO (on) of chip unit U1, chip list
Had been started up inside first U1, the switch terminals DRV of chip unit U1 will not output signal, UVLO (on) opens for chip unit U1 is minimum
Dynamic voltage；In the control end ENDT voltages=2V of chip unit U1, the control end ENDT of chip unit U1 exports 10 μ A electric currents,
Now, it is 2V+10 μ A (R3//R4) that the control end ENDT of chip unit U1 forms voltage, wherein, R3//R4 is 3rd resistor R3
With the parallel resistance resistance of the 4th resistance R4.
Wherein in one embodiment, the sense terminal SYN of the chip unit U1 is defeated for detecting the first of transformer 100
Go out the working condition at end, and send feedback signal to chip unit U1 treatment, and then determine the switch of chip unit U1
Hold the output state of DRV.
Wherein in one embodiment, the line loss compensation unit 400 is connected to the line loss compensation end of chip unit U1
LREG, the line loss compensation unit 400 includes the 9th resistance R9, the tenth resistance R10 and the 5th electric capacity C5, the 9th resistance R9
One end is electrically connected at the line loss compensation end LREG of chip unit U1, and the 9th resistance R9 other ends are electrically connected with the tenth
Resistance R10 one end and the 5th electric capacity C5 one end, the tenth resistance R10 other ends are electrically connected with the 7th resistance R7 and the 8th resistance
Between R8, the 5th electric capacity C5 other ends ground connection；By the electricity for adjusting the resistance of the 9th resistance R9 to compensate load unit 500
Pressure drop produced by the resistance of line line, with the input voltage value needed for proof load unit 500.
When metal-oxide-semiconductor Q1 is in the conduction state, metal-oxide-semiconductor Q1 has electric current to flow through, now, the line loss compensation end of chip unit U1
The electric current I_R9 that flows through of LREG determines by the 9th resistance R9, and electric current I_R9 large compensation voltages of healing are bigger, when chip unit U1 work
When pattern is DCM (Discontinuous ConductionMode, discontinuous conduction mode), the resistance of load unit 500 is bigger
Electric current I_R9 is bigger；When chip unit U1 mode of operations are that (Continuous Conduction Mode, are continuously turned on mould to CCM
Formula) when, electric current I_R9 hardly changes with the resistance of load unit 500；Because electric current I_R9 is pulse current, therefore the 5th
Electric capacity C5 is filtered to electric current I_R9, while being electrically connected with controllable accurate source of stable pressure by the 5th electric capacity C5 and the 8th resistance R8
The reference edge of U2 carries out voltage-regulation.
Wherein in one embodiment, load unit 500 uses line length 1.8m, rated current 9A, the 16 of rated voltage 5V
The resistance of number electric wire wire is 0.0486 Ω, the pressure drop of 9A electric currents is flowed through for 0.437V, so ideally to compensate the electricity of 0.437V
Pressure, it is assumed that R7=10K Ω, R8=10K Ω, R10=10K Ω, the R9 resistances of required compensation 0.437V voltages are 36K Ω, wherein,
Offset voltage computing formula is offset voltage=2*R7/ (R9+R10).
As shown in figure 1, carrying out rectification in conventional charging circuit using diode D3, setting diode D3 flows through voltage V0
=5V, flows through electric current I0=9A, conduction impedance VfConduction losses=the I of=0.62 Ω, diode D30*Vf=5.58W.
As shown in Fig. 2 metal-oxide-semiconductor Q1's flows through voltage V0=5V, flows through electric current I0=9A, specification is Rds (on)=16.5m
Ω, Rds (on) are the conducting resistance of metal-oxide-semiconductor Q1 source electrodes and drain electrode, then the conduction losses of metal-oxide-semiconductor Q1 are I0 2* Rds (on)=
1.33W, greatly reduces power consumption, so as to improve the purpose that efficiency reaches carbon reduction.
In sum, the circuit of synchronous rectification of the utility model line loss compensation controls list by transformer 100 and rectification
Rectification unit 200 is set between unit 300, power consumption is reduced using the conducting resistance of metal-oxide-semiconductor Q1, so that improving efficiency reaches energy-conservation
Subtract the purpose of carbon；Meanwhile, the line loss compensation end LREG set using chip unit U1 is electrically connected with the 9th resistance R9, by regulation
The produced pressure drop of electric wire wire resistance of the resistance of the 9th resistance R9 to compensate load unit 500, with needed for proof load unit 500
Input voltage value.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore can not be interpreted as the limitation to the utility model the scope of the claims.It should be pointed out that common for this area
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (6)
1. a kind of circuit of synchronous rectification of line loss compensation, its connection transformer, it is characterised in that：Including rectification unit and rectification control
The first output end electric connection of unit processed, described rectification unit one end and transformer, the rectification unit other end and transformation
Second output end of device is connected with load unit, and the rectification unit is provided with metal-oxide-semiconductor, the drain electrode of the metal-oxide-semiconductor and transformer
The first output end be electrically connected with, the source electrode of the metal-oxide-semiconductor is electrically connected with load unit, the source electrode and grid of the metal-oxide-semiconductor
It is electrically connected with Commutation control unit respectively.
2. the circuit of synchronous rectification of line loss compensation according to claim 1, it is characterised in that：Also include line loss compensation list
Unit, the Commutation control unit is provided with chip unit, and the chip unit is provided with earth terminal, switch terminals, sense terminal, control
End, voltage input end and line loss compensation end, the source electrode of the metal-oxide-semiconductor are electrically connected with the earth terminal of chip unit, the metal-oxide-semiconductor
The control end of grid and chip unit be electrically connected with, be electrically connected with voltage stabilizing between the earth terminal and control end of the chip unit
Diode, the sense terminal of the chip unit is electrically connected by first resistor and second resistance with the first output end of transformer
Connect, the first resistor two ends are parallel with the first electric capacity；
The voltage input end of the chip unit is electrically connected with the second output end of transformer, the second output end of the transformer
3rd resistor and the 4th resistance are electrically connected with and the source electrode of metal-oxide-semiconductor between, the 3rd resistor and the 4th resistant series are set,
The switch terminals of the chip unit are electrically connected between 3rd resistor and the 4th resistance；The line loss compensation unit and chip list
The line loss compensation end of unit is electrically connected with.
3. the circuit of synchronous rectification of line loss compensation according to claim 2, it is characterised in that：The line loss compensation unit bag
The 9th resistance, the tenth resistance and the 5th electric capacity are included, described 9th resistance one end is electrically connected at the line loss compensation end of chip unit,
The 9th resistance other end is electrically connected with the tenth resistance one end and the 5th electric capacity one end, the tenth resistance other end electricity
Property between the 7th resistance of connection and the 8th resistance, the 5th electric capacity other end ground connection；By adjust the 9th resistance resistance come
The pressure drop produced by the electric wire wire resistance of load unit is compensated, with the input voltage value needed for proof load unit.
4. the circuit of synchronous rectification of line loss compensation according to claim 1 and 2, it is characterised in that：The load unit bag
Include the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, photoelectrical coupler and
Controllable accurate source of stable pressure, second electric capacity and the 3rd electric capacity are electrically connected with the second output end and metal-oxide-semiconductor in transformer
Source electrode between, described 5th resistance one end and the 7th resistance one end are electrically connected with the second output end of transformer, described
The 5th resistance other end is electrically connected with photoelectrical coupler one end, and the 7th resistance other end electrically connects with the 8th resistance one end
Connect, the anode tap of the 8th resistance other end and controllable accurate source of stable pressure ground connection, described 6th resistance one end and controllable accurate
The reference edge of source of stable pressure is electrically connected between the 7th resistance and the 8th resistance, and the 6th resistance other end connects the 4th electric capacity
The cathode terminal of one end, the 4th electric capacity other end and controllable accurate source of stable pressure is electrically connected with the photoelectrical coupler other end.
5. the circuit of synchronous rectification of line loss compensation according to claim 4, it is characterised in that：The controllable accurate source of stable pressure
It is TL431 chip structures.
6. the circuit of synchronous rectification of line loss compensation according to claim 2, it is characterised in that：The chip of the chip unit
Model LD8520.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621150044.3U CN206293950U (en) | 2016-10-24 | 2016-10-24 | The circuit of synchronous rectification of line loss compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621150044.3U CN206293950U (en) | 2016-10-24 | 2016-10-24 | The circuit of synchronous rectification of line loss compensation |
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| Publication Number | Publication Date |
|---|---|
| CN206293950U true CN206293950U (en) | 2017-06-30 |
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ID=59094684
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621150044.3U Expired - Fee Related CN206293950U (en) | 2016-10-24 | 2016-10-24 | The circuit of synchronous rectification of line loss compensation |
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| Country | Link |
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| CN (1) | CN206293950U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733212A (en) * | 2017-10-26 | 2018-02-23 | 东莞启益电器机械有限公司 | Has the direct current of power saving function with exchanging output circuit |
| CN109991455A (en) * | 2019-01-30 | 2019-07-09 | 国网浙江省电力有限公司衢州供电公司 | Battery compensation system after a kind of intelligent electric meter battery undervoltage |
-
2016
- 2016-10-24 CN CN201621150044.3U patent/CN206293950U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733212A (en) * | 2017-10-26 | 2018-02-23 | 东莞启益电器机械有限公司 | Has the direct current of power saving function with exchanging output circuit |
| CN107733212B (en) * | 2017-10-26 | 2024-04-16 | 东莞启益电器机械有限公司 | DC and AC output circuit with energy-saving function |
| CN109991455A (en) * | 2019-01-30 | 2019-07-09 | 国网浙江省电力有限公司衢州供电公司 | Battery compensation system after a kind of intelligent electric meter battery undervoltage |
| CN109991455B (en) * | 2019-01-30 | 2021-01-26 | 国网浙江省电力有限公司衢州供电公司 | Battery compensation system after intelligent electric meter battery under-voltage |
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