CN103683885B - Device for preventing electric current backward flowing and output capacitor discharging - Google Patents
Device for preventing electric current backward flowing and output capacitor discharging Download PDFInfo
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- CN103683885B CN103683885B CN201310672507.7A CN201310672507A CN103683885B CN 103683885 B CN103683885 B CN 103683885B CN 201310672507 A CN201310672507 A CN 201310672507A CN 103683885 B CN103683885 B CN 103683885B
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Abstract
The invention relates to a device for preventing electric current backward flowing and output capacitor discharging. The output end of a rectification unit is connected with a filtering unit, the output positive end of the filtering unit is connected with a backward-flowing prevention diode and an output control switch, the output control switch is connected with a voltage reduction circuit, and a cathode of the backward-flowing prevention diode is connected with a voltage detection branch, a switch and a large capacitive load; one end of the voltage detection branch is located at the front end of the large capacitive load, one end of a sampling branch is connected with the rear end of the large capacitive load, the other end of the voltage detection branch and the other end of the sampling branch are connected to a control circuit unit, the control circuit unit is connected with the switch and the output control switch in a control mode, the other end of the switch is connected with a booster circuit, the booster circuit and the voltage reduction circuit are connected with a high-voltage energy-storage capacitor, and the control circuit unit, the filtering unit, the booster circuit, the voltage reduction circuit and the high-voltage energy-storage capacitor are grounded. Energy flowing backwards from a load capacitor is rapidly absorbed and stored, the energy is rapidly released to an output capacitor when the device needs charging, and the on-off state of a main circuit and an energy storing circuit is controlled synchronously through an MCU.
Description
Technical field
The present invention relates to output capacitance energy recycle device during bulky capacitor load power source high-speed switch machine, more particularly, to prevent
Current flowing backwards and the device of output capacitance electric discharge.
Background technology
At present, civil power can be converted to constant or change a DC voltage and export it is possible to adjust by DC source
Magnitude of voltage and current limit powering load.For maintaining stablizing of output voltage, typically can parallel connection much jumbo electrolysis
Electric capacity is in outfan.In load current very little, the energy of output capacitance storage need to be lot more time to discharge.If necessary to fast
Fast Switching Power Supply to obtain square-wave output voltage, then needs power source internal components and parts to consume the energy on electric capacity.Generally,
The outfan of power supply also can connect an anti-reverse diode to stop electric current from pouring in down a chimney, and so then can not pass through power source internal components and parts
Consume the energy on electric capacity, result is that on electric capacity, voltage can not discharge it is impossible to obtain the output of a square wave, in addition, much setting
The standby requirement also having discharge time of shutting down, such design nor meet this requirement.Also being designed with of having extremely loads
Consumed energy, the energy so not only losing is big, and the poor effect when electric capacity is big.
Content of the invention
The purpose of the present invention is to overcome the shortcomings of that prior art exists, and provides one kind to prevent current flowing backwards and output capacitance from putting
The device of electricity, quickly can discharging for electric capacity under various loading conditions, thus obtaining square-wave output voltage, consuming simultaneously
Energy is minimum, does not increase the radiating burden of product.
The purpose of the present invention is achieved through the following technical solutions：
Prevent current flowing backwards and the device of output capacitance electric discharge, feature is：Including rectification unit and filter unit, rectification list
The outfan of unit is connected with filter unit, and the output plus terminal of filter unit takes over control anti-filling diode and output control switch, output
Controlling switch connects reduction voltage circuit, and the negative electrode that counnter attack fills diode connects voltage detecting branch road, switch and large capacitive load, and voltage is examined
The one end surveying branch road is located at the front end of large capacitive load, and one end of sampling branch road connects the rear end of large capacitive load, voltage detecting
The other end of the other end of branch road and sampling branch road connects to control circuit unit, control circuit unit and switch and output control
On-off control connects, and the other end of switch connects booster circuit, and booster circuit and reduction voltage circuit are all connected with high-voltage energy storage capacitor, control
Circuit unit processed, filter unit, booster circuit, reduction voltage circuit and high-voltage energy storage capacitor ground connection.
Yet further, the above-mentioned device preventing current flowing backwards and output capacitance electric discharge, described control circuit unit is
MCU control unit.
The substantive distinguishing features of technical solution of the present invention and progress are mainly reflected in：
The present invention can quickly absorb and store and pour in down a chimney, from load capacitance, the energy returned, the quick release energy when needing to charge
Measure to output capacitance, the on off operating mode of MCU Synchronization Control main circuit and accumulator.Solve the pass producing compared with large capacitive load
Motor speed problem, had both protected the output par, c of power supply itself, provided the square wave of high-speed switch again.
Brief description
Below in conjunction with the accompanying drawings technical solution of the present invention is described further：
Fig. 1：The organigram of the present invention.
Specific embodiment
As shown in figure 1, preventing current flowing backwards and the device of output capacitance electric discharge, including rectification unit 1 and filter unit 2,
The outfan of rectification unit 1 is connected with filter unit 2, and the output plus terminal of filter unit 2 takes over control anti-filling diode 3 and output control
Switch 4, output control switch 4 connects reduction voltage circuit 5, and the negative electrode that counnter attack fills diode 3 meets voltage detecting branch road 6, switch 11 and
Large capacitive load 9, one end of voltage detecting branch road 6 is located at the front end of large capacitive load 9, and one end of sampling branch road 7 connects great Rong
Property load 9 rear end, the other end of the other end of voltage detecting branch road 6 and sampling branch road 7 connects to control circuit unit 8, controls
Circuit unit 8 processed is MCU control unit, and control circuit unit 8 is connected with switch 11 and output control switch 4 control, switchs 11
The other end connect booster circuit 10, booster circuit 10 and reduction voltage circuit 5 are all connected with high-voltage energy storage capacitor 12, control circuit unit
8th, filter unit 2, booster circuit 10, reduction voltage circuit 5 and high-voltage energy storage capacitor 12 are grounded.
The impulse commutation that transformator exports is become positive voltage by rectification unit 1（Or pulse）；Filter unit 2 will be whole
Voltage after stream filters into clean DC voltage；Counnter attack fills diode 3 and is prevented from electric current in outside energy storage device（Such as great Rong
Property load 9）Electric current snap back flows and does not hinder electric current to flow outward；When MCU sends the output of signal power cutoff, control
Circuit unit 8 opens switch 11, turns off output control switch 4, and output capacitance energy is sent to high-voltage energy storage capacitor 12 and stores.When
When MCU sends signal and turns on the power output, control circuit unit 8 opens output control switch 4, turns off switch 11, is stored in height
The energy of pressure storage capacitor 12 fills diode 3 further through counnter attack and delivers to output, makes energy recycling.
Outside large capacitive load 9 when being connected to charge power supply, counnter attack fill diode 3 can block moment excessive electric current from
The electric capacity of the internal filter unit 2 of external loading flow direction, because counnter attack fills the presence of diode 3, when load shutdown, output capacitance
Electric discharge does not have loop, load voltage release can be led to very slow, sometimes up to as long as several minutes, so both affected the safety of equipment,
It is unable to the higher square-wave output voltage of exhaust frequency again.In order to solve this problem it is necessary to provide suitable path to output electricity
Hold.Switch 11, booster circuit 10, high-voltage energy storage capacitor 12, reduction voltage circuit 5 then arise at the historic moment, and provide outlet for output.Energy exists
Need to be temporarily stored within this passage when turning off output, when waiting start again, export in load.In protection power filter portion
While point not being subject to anti-sink current infringement, also provide capacitive energy transferring path.
Frequency that the logic of MCU switchs according to output voltage and determine, charge simultaneously opening main circuit for output capacitance,
Open output control switch 4, turn off switch 11, the energy of storage is discharged into output capacitance；While closing main circuit, beat
Switch 11, turns off output control switch 4, by the energy transfer in output capacitance to high-voltage energy storage capacitor 12, in this process
In, output voltage declines rapidly, so the working range of booster circuit needs setting to compared with low input, so that output electricity
Most of energy transfer in appearance.In addition, the control circuit of step-up/step-down circuit remains working condition, to shorten response time,
Complete energy conversion as early as possible.
Voltage accuracy on high-voltage energy storage capacitor 12 does not need very high, as long as guaranteeing to store enough energy and electric capacity
Itself will not be damaged, such booster circuit 10 and reduction voltage circuit 5 are required for expensive control circuit, only need to keep most basic
Voltage transformation function.
The present invention quickly absorbs and stores and pours in down a chimney, from load capacitance, the energy returned, the quick release of energy when needing to charge
To output capacitance, the on off operating mode of MCU Synchronization Control main circuit and accumulator.Solve the shutdown producing compared with large capacitive load
Speed issue, had both protected the output par, c of power supply itself, provided the square wave of high-speed switch again.
It is emphasized that：The above is only presently preferred embodiments of the present invention, not the present invention is made any formal
Restriction, any simple modification, equivalent variations and modification that every technical spirit according to the present invention is made to above example,
All still fall within the range of technical solution of the present invention.
Claims (2)
1. prevent current flowing backwards and output capacitance electric discharge device it is characterised in that：Including rectification unit and filter unit, rectification
The outfan of unit is connected with filter unit, and the output plus terminal of filter unit takes over control anti-filling diode and output control switch, defeated
Go out controlling switch and connect reduction voltage circuit, the negative electrode that counnter attack fills diode connects voltage detecting branch road, switch and large capacitive load, voltage
One end of detection branch is located at the front end of large capacitive load, and one end of sampling branch road connects the rear end of large capacitive load, and voltage is examined
The other end of the other end and sampling branch road of surveying branch road connects to control circuit unit, one end of control circuit unit and switch and
Output control switch controls connection, and the other end of switch connects booster circuit, and booster circuit and reduction voltage circuit are all connected with high pressure storage
Energy electric capacity, control circuit unit, filter unit, booster circuit, reduction voltage circuit and high-voltage energy storage capacitor ground connection.
2. according to claim 1 prevent current flowing backwards and output capacitance electric discharge device it is characterised in that：Described control
Circuit unit is MCU control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310672507.7A CN103683885B (en) | 2013-12-12 | 2013-12-12 | Device for preventing electric current backward flowing and output capacitor discharging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310672507.7A CN103683885B (en) | 2013-12-12 | 2013-12-12 | Device for preventing electric current backward flowing and output capacitor discharging |
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| Publication Number | Publication Date |
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| CN103683885A CN103683885A (en) | 2014-03-26 |
| CN103683885B true CN103683885B (en) | 2017-02-15 |
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| CN201310672507.7A Active CN103683885B (en) | 2013-12-12 | 2013-12-12 | Device for preventing electric current backward flowing and output capacitor discharging |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104411051A (en) | 2014-11-25 | 2015-03-11 | 欧普照明股份有限公司 | LED drive output end capacitor protecting circuit |
| CN107294365A (en) * | 2016-03-30 | 2017-10-24 | 中兴通讯股份有限公司 | A kind of power supply circuit and negative sense carrying out surge protection method |
| CN108964430B (en) * | 2017-05-25 | 2022-01-28 | 中兴通讯股份有限公司 | Discharging method and device of switching power supply |
| WO2021237409A1 (en) * | 2020-05-25 | 2021-12-02 | 深圳市锐明技术股份有限公司 | Protection circuit, power supply system of hard disk device, and vehicular device |
| CN114421430A (en) * | 2022-01-27 | 2022-04-29 | 东风汽车有限公司东风日产乘用车公司 | Reverse-filling-prevention short-circuit protection system and method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101203084A (en) * | 2006-12-12 | 2008-06-18 | 美国凹凸微系有限公司 | Power supply circuit for LCD backlight and method thereof |
| CN101521410A (en) * | 2008-11-24 | 2009-09-02 | 三一重工股份有限公司 | Method and device for power failure safeguard |
| CN101860200A (en) * | 2010-04-27 | 2010-10-13 | 华为技术有限公司 | Power-down retaining circuit, method and power supply system |
| CN102111011A (en) * | 2011-02-28 | 2011-06-29 | 华为技术有限公司 | Power failure maintaining method and circuit |
| CN202918041U (en) * | 2012-10-25 | 2013-05-01 | 施耐德电器工业公司 | Backup power supply circuit of electronic equipment |
| CN103219782A (en) * | 2013-05-02 | 2013-07-24 | 安伏（苏州）汽车电源科技有限公司 | High-power battery charging device capable of preventing reverse current charging and battery reversal |
| CN103296909A (en) * | 2012-12-27 | 2013-09-11 | 天津森宇科技发展有限公司 | Energy-saving device for power output feedback power supply |
| CN203590011U (en) * | 2013-12-12 | 2014-05-07 | 安伏（苏州）电子有限公司 | Device for preventing current backflow and output capacitance discharge |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI466407B (en) * | 2012-01-20 | 2014-12-21 | Ind Tech Res Inst | Energy recycle device |
| US20130320954A1 (en) * | 2012-06-01 | 2013-12-05 | Fairchild Semiconductor Corporation | Switched-mode voltage converter with energy recovery system |
-
2013
- 2013-12-12 CN CN201310672507.7A patent/CN103683885B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101203084A (en) * | 2006-12-12 | 2008-06-18 | 美国凹凸微系有限公司 | Power supply circuit for LCD backlight and method thereof |
| CN101521410A (en) * | 2008-11-24 | 2009-09-02 | 三一重工股份有限公司 | Method and device for power failure safeguard |
| CN101860200A (en) * | 2010-04-27 | 2010-10-13 | 华为技术有限公司 | Power-down retaining circuit, method and power supply system |
| CN102111011A (en) * | 2011-02-28 | 2011-06-29 | 华为技术有限公司 | Power failure maintaining method and circuit |
| CN202918041U (en) * | 2012-10-25 | 2013-05-01 | 施耐德电器工业公司 | Backup power supply circuit of electronic equipment |
| CN103296909A (en) * | 2012-12-27 | 2013-09-11 | 天津森宇科技发展有限公司 | Energy-saving device for power output feedback power supply |
| CN103219782A (en) * | 2013-05-02 | 2013-07-24 | 安伏（苏州）汽车电源科技有限公司 | High-power battery charging device capable of preventing reverse current charging and battery reversal |
| CN203590011U (en) * | 2013-12-12 | 2014-05-07 | 安伏（苏州）电子有限公司 | Device for preventing current backflow and output capacitance discharge |
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| CN103683885A (en) | 2014-03-26 |
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