CN107612370A - Multichannel rectification circuit and Switching Power Supply altogether - Google Patents
Multichannel rectification circuit and Switching Power Supply altogether Download PDFInfo
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- CN107612370A CN107612370A CN201710850059.3A CN201710850059A CN107612370A CN 107612370 A CN107612370 A CN 107612370A CN 201710850059 A CN201710850059 A CN 201710850059A CN 107612370 A CN107612370 A CN 107612370A
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Abstract
The invention provides a kind of multichannel, rectification circuit and Switching Power Supply, wherein rectification circuit include altogether：It is parallel at least single-phase conduction path and at least full-wave rectification path all the way all the way of same AC power；Switch module, at least single-phase conduction path block and/or at least AC of full-wave rectification path all the way all the way are arranged on, for when opening, disconnecting the path where switch module.Due to multiple DC output ends altogether, in full-wave rectification path and/or the input of single-phase conduction path, switch module is set, when switch module disconnects, due to, full-wave rectification path and/or single-phase conduction path are parallel to same AC power, for path where switch module when any one-level is high potential in the two poles of the earth of AC power, equal no current is by the way that the DC Module that multichannel exports altogether more can effectively control wherein one or more power-off.
Description
Technical field
The present invention relates to power technique fields, and in particular to a kind of multichannel rectification circuit and Switching Power Supply altogether.
Background technology
Existing multiple-channel output rectification circuit is generally rectification circuit that multichannel as shown in Figure 1 does not export altogether (with two
Illustrated exemplified by road).In multiple-channel output rectification circuit, it usually needs to wherein all the way or a few roads power off, for example, load set
It is standby in holding state, it is necessary to the power supply of off device work, without the power supply of controller in off device.
In the prior art, as shown in figure 1, in multiple-channel output all the way or the power-off of a few roads is typically employed in and needs to power off
All the way or the input of the rectification module on a few roads adds switch module 40, and when needing power-off, it is i.e. achievable need to only to disconnect switch
The road powers off.
However, multipath rectification circuit scheme sometimes for multichannel altogether, for example, the VCC windings of DC brushless motor are with opening
Powered-down source assists winding is same winding, and when VDC is with another way rectification circuit, the rectification circuit reference ground of Switching Power Supply with
VDC rectification circuit reference ground is altogether.(being illustrated by taking two-way as an example), the input addition of rectification module is opened all the way wherein
Module 40 is closed, when switch module 40 disconnects, electric capacity C1 and electric capacity C2 is charged, two-way has output, it is impossible to plays disconnection
Effect wherein all the way.
Therefore, how to control one or more power-off in the rectification circuit that multichannel exports altogether to turn into urgently to be resolved hurrily to ask
Topic.
The content of the invention
One or more power-off of the technical problem to be solved in the present invention in the rectification circuit that control multichannel exports altogether.
Therefore, according in a first aspect, the embodiments of the invention provide a kind of multichannel rectification circuit altogether, including：It is parallel to
At least single-phase conduction path and at least full-wave rectification path all the way all the way of same AC power；Switch module, it is arranged at least
Single-phase conduction path block and/or at least all the way on any one input of full-wave rectification path all the way, in switch module
During opening, the path where switch module is disconnected.
Alternatively, single-phase conduction path includes：First single-phase conduction device, the positive pole and AC power of the first single-phase conduction device
Pole connection, the negative pole of the first single-phase conduction device and the DC output end of single-phase conduction path；Second single-phase conduction device, second
The positive pole of single-phase conduction device and another pole connection of AC power, the negative pole of the second single-phase conduction device and the first single-phase conduction device
Negative pole connects；Switch module is arranged on the positive pole of the first single-phase conduction device or the input of the second single-phase conduction device, for opening
When closing module opening, the path where the second conduction device of path or disconnection where the first single-phase conduction device of disconnection.
Alternatively, single-phase conduction device includes：At least one diode, the positive pole of diode are connected with power supply, diode
Negative pole is the DC output end of single-phase conduction path.
Alternatively, full-wave rectification bridge or full-wave bridge heap, it is arranged on the DC output end of AC power and full-wave rectification path
Between；Switch module is arranged on any one input of full-bridge rectifier or full-wave bridge heap, for when switch module is opened,
The path of input where disconnecting switch module.
Alternatively, any one in relay circuit, semiconductor switch or mechanical switch.
Alternatively, rectification circuit also includes multichannel altogether：Filter circuit, respectively with the DC output end of single-phase conduction path
It is in parallel with the DC output end of full-wave rectification path.
Alternatively, filter circuit includes at least one electric capacity.
Alternatively, rectification circuit also includes multichannel altogether：Resistance, is separately positioned on single-phase conduction path and full-wave rectification is led to
Lu Zhong.
Alternatively, resistance includes thermistor, cement resistor, wire resistor and/or metal-back packaged resistance.
According to second aspect, the embodiments of the invention provide a kind of Switching Power Supply, including：
Switching Power Supply main circuit and the rectification circuit such as above-mentioned first aspect any one.
Multichannel provided in an embodiment of the present invention rectification circuit and Switching Power Supply, including be parallel to same AC power altogether
At least single-phase conduction path and at least full-wave rectification path all the way all the way；Switch module, is arranged at least that single-phase conducting is logical all the way
Road block and/or at least AC of full-wave rectification path all the way, for when opening, disconnecting the path where switch module.By
In multiple DC output ends altogether, switch module is set in full-wave rectification path and/or the input of single-phase conduction path, opened
When closing module disconnection, because full-wave rectification path and/or single-phase conduction path are parallel to same AC power, switch module institute
The two poles of the earth in AC power of path in any one-level be high potential when, equal no current passes through the direct current that multichannel exports altogether
Module more can effectively control wherein one or more power-off.
Brief description of the drawings
Fig. 1 shows that the present invention can disconnect not two-way output rectification circuit figure altogether all the way in the prior art；
Fig. 2 shows that the present invention can disconnect common ground two-way output rectification circuit figure all the way in the prior art；
Fig. 3 shows the rectification circuit figure of two-way altogether in the embodiment of the present invention；
Fig. 4 shows the rectification circuit figure of two-way altogether in the embodiment of the present invention.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that instruction or hint relative importance.
The embodiments of the invention provide a kind of multichannel rectification circuit altogether, as shown in figure 3, the rectification circuit includes：
It is parallel at least single-phase conduction path 50 and at least full-wave rectification path 60 all the way all the way of same AC power；Open
Module 40 is closed, is arranged at least that any one of single-phase conduction path 50 and/or at least full-wave rectification path 60 all the way are defeated all the way
Enter on end, for when the switch module 40 is opened, disconnecting the path where switch module 40.In the particular embodiment,
AC power is alternating current, can be commercial power specifically, can be household electricity, and alleged AC power can include the
One electrode A C-L1 and second electrode AC-N1, wherein, the friendship of first electrode AC-L1 electric signal for live wire electric signal after filtered
Flow signal, AC signals of the second motor AC-N1 for zero line electric signal after filtered.In the present embodiment, it is alleged it is multiple altogether
DC output end 20 include at least two DC output ends, single-phase conduction path 50 and full-wave rectification can be corresponded respectively
Path 60.In the present embodiment, switch module 40 can be arranged on the defeated of single-phase conduction path 50 and/or full-wave rectification path 60
Enter end, specifically, switch module 40 can be arranged on the single-phase conduction path 50 all the way for needing to disconnect and/or full-wave rectification is led to
The input on road 60.Can also be in each single-phase conduction path 50 and the input of full-wave rectification path 60.It is somebody's turn to do needing to disconnect
When road exports, switch module 40 is disconnected.In the present embodiment, switch module 40 is in the state of disconnection, the switch currently disconnected
DC output end no current corresponding to module 40 exports.In the present embodiment, due to multiple DC output ends 20 altogether, all-wave is whole
Logical circulation road 60, it is ensured that output end exports for all-wave.
It is parallel at least single-phase conduction path and at least full-wave rectification path all the way all the way of same AC power；Switching molding
Block, at least single-phase conduction path block and/or at least AC of full-wave rectification path all the way all the way are arranged on, for opening
When, disconnect the path where switch module.Due to multiple DC output ends altogether, in full-wave rectification path and/or single-phase conducting
The input of path sets switch module, when switch module disconnects, due to full-wave rectification path and/or single-phase conduction path
Same AC power is parallel to, the path where switch module is when any one-level is high potential in the two poles of the earth of AC power,
No current is by the way that the DC Module that multichannel exports altogether more can effectively control wherein one or more power-off.
In an alternate embodiment of the invention, at least one single-phase conduction path 50, specifically may refer to the circuit shown in Fig. 3
Figure, wherein, the single-phase conduction path 50 can utilize in full-wave rectification path 60 in parallel therewith with the single-phase conduction path
50 opposite single-phase turning circuits form full bridge rectifiers, in the single-phase conduction path 50, can include first and single-phase lead
Logical device and the second single-phase conduction device, the positive pole of the first single-phase conduction device are connected with first electrode AC-L1, the first single-phase conduction device
Negative pole connects with single-phase 50 corresponding DC output end of conduction path；The positive pole of second single-phase conduction device and second electrode AC-N1
Connection, the negative pole of the second single-phase conduction device are connected with the negative pole of the first single-phase conduction device, and in the present embodiment, switch module 40 can
To be arranged on the positive pole of the first single-phase conduction device, or the positive pole of the second single-phase conduction device.When switch module 40 disconnects, the is disconnected
One single-phase conduction device or the second single-phase conduction device.In the present embodiment, single-phase conduction device can be single diode, can be string
Multiple diodes of connection.For example, as shown in figure 3, first electrode AC-L1 potential is higher than second electrode AC-N1, its electric current flows through
First path be first electrode AC-L1, the first diode D1, first resistor RC1, the first electric capacity C1, the 6th diode D6 is extremely
Second electrode AC-N1, the first load R1 obtain electric work.Second path is first electrode AC-L1, the 3rd diode D3, second electricity
RC2 is hindered, the second electric capacity C2, the 6th diode D6 to second electrode AC-N1, second loads R2 obtains electric work.Second electrode AC-N1
Potential be higher than first electrode AC-L1, the 3rd path that its electric current flows through is second electrode AC-N1, the second diode D2, first
Resistance RC1, the first electric capacity C1, the 5th diode D5 to first electrode AC-L1, first load R1 obtains electric work, the first load R1
Obtain electric work.4th path is, second electrode AC-N1, the 4th diode D4, second resistance R3, the second electric capacity C2, the five or two pole
Pipe D5 to first electrode AC-L1 second loads R2 obtains electric work.It is possible thereby to realize that two-way all-wave exports.
By taking Fig. 3 as an example, filter circuit is road DC output end altogether, wherein the rectification module for being all the way is that single-phase conducting is logical
Road, another way is full-wave rectification path, in embodiment, or multichannel, in the present embodiment, with switch module 40 complete
Ripple rectifying path input, when switch module 40 disconnects, and when first electrode AC-L1 potential is higher than second electrode AC-N1,
Its current path is that first electrode AC-L1, the first diode D1, first resistor RC1, the first electric capacity C1, the 6th diode D6 is extremely
Second electrode AC-N1.C2 no currents flow through.Second electrode AC-N1 potential is higher than first electrode AC-L1, no guiding path.Can
One or more power-off in the rectification circuit exported altogether with more effective control multichannel.
In the present embodiment, first resistor RC1 and second resistance RC2 is used to limit dash current, first resistor RC1 and the
Two resistance RC2 can be that thermistor can also be cement resistor and wire resistor, metal-back packaged resistance, in the present embodiment
In, first resistor RC1 and second resistance RC2 can also be other high-power resistances.It can be selected to use PTC according to actual conditions
(Positive Temperature CoeffiCient) resistance or NTC (Negative Temperature CoeffiCient)
Resistance, in the present embodiment, first resistor RC1 and second resistance RC2 position are not limited to position shown in Fig. 4, can be arranged on
Optional position between power supply and DC output end.In the present embodiment, the first electric capacity C1 and the second electric capacity C2 is filtering
Electric capacity, for stabilizing the direct current of output.In the present embodiment, switch module 40 can be relay and its control circuit,
It can be semiconductor switch (for example, controllable silicon) and its control circuit, or mechanical switch.
After ensureing one or more disconnection in rectification circuit, the circuit being not turned off can normally export all-wave,
In an alternate embodiment of the invention, switch module 40 can also be arranged on the output end of rectification circuit, such as the switch of dotted portion in Fig. 3
Shown in module 40, in the present embodiment, when switch module 40 disconnects, and first electrode AC-L1 potential is higher than second electrode
During AC-N1, its current path is, first electrode AC-L1, the first diode D1, first resistor RC1, the first electric capacity C1, the six or two
Pole pipe D6 to second electrode AC-N1.C2 no currents flow through.When second electrode AC-N1 potential is higher than first electrode AC-L1, electricity
Flow path is second electrode AC-N1, the second diode D2, first resistor RC1, the first electric capacity C1, the 5th diode D5 to first
Electrode A C-L1.So as to realize that the first electric capacity C1 has electric current to flow through in the positive half period of electric current and the negative half-cycle of electric current,
The output end is exported with all-wave.
In alternatively embodiment, full-wave rectification path 60, switch module 40 can set the output of full-wave rectification path
End, ensure to be all-wave output per road DC output end.In the present embodiment, full-wave rectification path 60 can be full-wave rectification bridge
Or full-wave bridge heap, the two poles of the earth connection of the ac input end and power supply of full-wave rectification bridge or full-wave bridge heap, full-wave rectification bridge or all-wave
The DC output end connection corresponding with full-wave rectification path of the output end of bridge heap.Wherein, full-wave bridge heap can be four diodes
The full-wave rectifying circuit being linked to be, it is specific as shown in figure 4, Fig. 4 exemplary showing two-way has full-wave rectification path, switch
The exemplary output end for being arranged on full-wave rectification path of module 40, switch module 40 can also be arranged on full-wave rectification path
Input.When switch module 40 turns on, because path where electric capacity C3 is full-wave rectification loop, it exports all-wave, and the 3rd is negative
Carry R3 and obtain electric work, the path where C4, be similarly full-wave rectification loop, it exports all-wave, and the 4th load R4 obtains electric work
When switch module 40 disconnects, because path where electric capacity C3 is full-wave rectification loop, it exports all-wave, and the 3rd load R3 obtains electric
Work.Path is without guiding path where C4.The rectification circuit of multichannel altogether is not interfere with each other, and does not interfere with the work of another way.
The stability of circuit can be so greatly enhanced, while also ensure that the reliability of circuit.
The embodiment of the present invention additionally provides a kind of Switching Power Supply, including, Switching Power Supply main circuit, and above-described embodiment are retouched
The rectification circuit stated.
Although being described in conjunction with the accompanying embodiments of the present invention, those skilled in the art can not depart from this hair
Various modification can be adapted in the case of bright spirit and scope and modification, and such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (10)
- A kind of 1. multichannel rectification circuit altogether, it is characterised in that including：It is parallel at least single-phase conduction path and at least full-wave rectification path all the way all the way of same AC power；Switch module, is arranged at least that any one of single-phase conduction path and/or at least full-wave rectification path all the way are defeated all the way Enter on end, for when the switch module disconnects, disconnecting the path where the switch module.
- 2. multichannel as claimed in claim 1 rectification circuit altogether, it is characterised in that the single-phase conduction path includes：First single-phase conduction device, the positive pole of the first single-phase conduction device are connected with a pole of the AC power, the first single-phase conducting The negative pole of device and the DC output end of single-phase conduction path；Second single-phase conduction device, the positive pole of the second single-phase conduction device are connected with another pole of the AC power, and second single-phase leads The negative pole of logical device is connected with the negative pole of the described first single-phase conduction device；The switch module is arranged on the positive pole of the described first single-phase conduction device or the input of the second single-phase conduction device, for When the switch module is opened, the path where the second conduction device of path or disconnection where the first single-phase conduction device of disconnection.
- 3. multichannel as claimed in claim 2 rectification circuit altogether, it is characterised in that the single-phase conduction device includes：At least one diode, the positive pole of diode are connected with described with power supply, and the negative pole of diode is logical for the single-phase conducting The DC output end on road.
- 4. multichannel as claimed in claim 1 rectification circuit altogether, it is characterised in that the full-wave rectification path includes：Full-wave rectification bridge or full-wave bridge heap, be arranged on the AC power and the full-wave rectification path DC output end it Between；The switch module is arranged on any one input of the full-bridge rectifier or full-wave bridge heap, in the switch When module is opened, the path of input where disconnecting the switch module.
- 5. multichannel as claimed in claim 1 rectification circuit altogether, it is characterised in that the switch module includes：Any one in relay circuit, semiconductor switch or mechanical switch.
- 6. multichannel as claimed in claim 1 rectification circuit altogether, it is characterised in that also include：Filter circuit, respectively with the DC output end of the single-phase conduction path and the DC output end of the full-wave rectification path It is in parallel.
- 7. multichannel as claimed in claim 6 rectification circuit altogether, it is characterised in that the filter circuit includes at least one electricity Hold.
- 8. multichannel as claimed in claim 1 rectification circuit altogether, it is characterised in that also include：Resistance, it is separately positioned on described In single-phase conduction path and the full-wave rectification path.
- 9. multichannel as claimed in claim 1 rectification circuit altogether, it is characterised in that the resistance includes thermistor, cement Resistance, wire resistor and/or metal-back packaged resistance.
- A kind of 10. Switching Power Supply, it is characterised in that including：Switching Power Supply main circuit andMultichannel as described in claim 1-9 any one rectification circuit altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710850059.3A CN107612370A (en) | 2017-09-19 | 2017-09-19 | Multichannel rectification circuit and Switching Power Supply altogether |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710850059.3A CN107612370A (en) | 2017-09-19 | 2017-09-19 | Multichannel rectification circuit and Switching Power Supply altogether |
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| Publication Number | Publication Date |
|---|---|
| CN107612370A true CN107612370A (en) | 2018-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710850059.3A Pending CN107612370A (en) | 2017-09-19 | 2017-09-19 | Multichannel rectification circuit and Switching Power Supply altogether |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277487A (en) * | 1999-06-03 | 2000-12-20 | 索尼公司 | Electric source device, method and electronic apparatus |
| JP2003059633A (en) * | 2001-08-20 | 2003-02-28 | Mitsubishi Electric Corp | Induction cooker |
| CN2689567Y (en) * | 2003-10-09 | 2005-03-30 | 孙泉龄 | Charger of automatic battery |
| CN1783683A (en) * | 2004-10-01 | 2006-06-07 | 松下电器产业株式会社 | Air conditioner |
| CN101636014A (en) * | 2009-08-12 | 2010-01-27 | 苏州市春和电器有限公司 | Low power consumption standby circuit device of induction cooker |
| CN102545654A (en) * | 2010-12-21 | 2012-07-04 | 广东易事特电源股份有限公司 | Input rectification circuit of auxiliary power supply |
| CN102611338A (en) * | 2011-01-21 | 2012-07-25 | 汤征宁 | Wide voltage impedance step-down circuit |
| CN102843048A (en) * | 2012-09-20 | 2012-12-26 | 深圳市鑫汇科电子有限公司 | Power supply for low stand-by power consumption electromagnetic heating device and electromagnetic oven |
| CN204376744U (en) * | 2014-12-15 | 2015-06-03 | 浙江朗科智能电气有限公司 | Reduce the circuit of electromagnetic oven power consumption |
| CN104967300A (en) * | 2015-05-27 | 2015-10-07 | 阳光电源股份有限公司 | Precharging circuit and photovoltaic inverter |
| CN207782674U (en) * | 2017-09-19 | 2018-08-28 | 珠海格力电器股份有限公司 | Multichannel rectification circuit and Switching Power Supply altogether |
-
2017
- 2017-09-19 CN CN201710850059.3A patent/CN107612370A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277487A (en) * | 1999-06-03 | 2000-12-20 | 索尼公司 | Electric source device, method and electronic apparatus |
| JP2003059633A (en) * | 2001-08-20 | 2003-02-28 | Mitsubishi Electric Corp | Induction cooker |
| CN2689567Y (en) * | 2003-10-09 | 2005-03-30 | 孙泉龄 | Charger of automatic battery |
| CN1783683A (en) * | 2004-10-01 | 2006-06-07 | 松下电器产业株式会社 | Air conditioner |
| CN101636014A (en) * | 2009-08-12 | 2010-01-27 | 苏州市春和电器有限公司 | Low power consumption standby circuit device of induction cooker |
| CN102545654A (en) * | 2010-12-21 | 2012-07-04 | 广东易事特电源股份有限公司 | Input rectification circuit of auxiliary power supply |
| CN102611338A (en) * | 2011-01-21 | 2012-07-25 | 汤征宁 | Wide voltage impedance step-down circuit |
| CN102843048A (en) * | 2012-09-20 | 2012-12-26 | 深圳市鑫汇科电子有限公司 | Power supply for low stand-by power consumption electromagnetic heating device and electromagnetic oven |
| CN204376744U (en) * | 2014-12-15 | 2015-06-03 | 浙江朗科智能电气有限公司 | Reduce the circuit of electromagnetic oven power consumption |
| CN104967300A (en) * | 2015-05-27 | 2015-10-07 | 阳光电源股份有限公司 | Precharging circuit and photovoltaic inverter |
| CN207782674U (en) * | 2017-09-19 | 2018-08-28 | 珠海格力电器股份有限公司 | Multichannel rectification circuit and Switching Power Supply altogether |
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Application publication date: 20180119 |