CN106329919A - Capacitor step-down power taking circuit using dynamic resistance - Google Patents
Capacitor step-down power taking circuit using dynamic resistance Download PDFInfo
- Publication number
- CN106329919A CN106329919A CN201610802806.1A CN201610802806A CN106329919A CN 106329919 A CN106329919 A CN 106329919A CN 201610802806 A CN201610802806 A CN 201610802806A CN 106329919 A CN106329919 A CN 106329919A
- Authority
- CN
- China
- Prior art keywords
- diode
- switch
- resistance
- control unit
- electric capacity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a capacitor step-down power taking circuit using dynamic resistance, which comprises diodes D1 and D2, and a capacitor C, a current control unit and a diode D stacked serially, wherein the current control unit is composed of a voltage-divider resistor Rg and a switch Q; the a capacitor C, the current control unit and the diode D stacked serially are parallelly connected and then accessed to the positive electrode of a pulse power supply V; the capacitor C is connected with the anode of the diode D1; the cathode of the D1 is connected with a load; the cathode of the diode D2 is connected with the anode of the diode D1; the resistor Rg is connected with a capacitor Ct; the S pole of the switch Q is connected with a resistor Rs; the resistor Rs is connected with the anode of the diode D1; and the resistor Rg is connected with the gate of the switch Q. The size of charge discharge resistance in the capacitor step-down circuit can be dynamically adjusted, large current can be generated in the case of no pulsation in a long time, and working of the load is maintained; and in the dynamic case, the circuit can be switched into the large resistance mode, the current is basically provided by the step-down capacitor, the power consumption is reduced and the efficiency is improved.
Description
Technical field
The invention belongs to high-power electric and electronic field, relate to a kind of capacitance decompression power-supply circuit using dynamic electric resistor.
Background technology
Power taking from high-pressure pulsating DC source, powers to low voltage control device, generally uses DC/DC changer, or
Power with isolating transformer.But in high pressure and supertension field, isolating transformer or the cost of DC/DC transducer, volume, weight
Steeply rise, even can not realize.
The technology that capacitance decompression is the most ancient and is widely used.Its operation principle utilizes electric capacity certain
The capacitive reactance produced under AC signal frequency limits maximum operating currenbt, presents constant-current characteristics, this electric current is carried out rectifying and wave-filtering
After voltage stabilizing, power to low-voltage device.
Fig. 1 be the operating circuit schematic diagram of halfwave rectifier formula capacitance decompression: V be high direct voltage pulsafeeder, friendship therein
Flow component is by completing halfwave rectifier to diode D1, D1 after electric capacity C1 blood pressure lowering, and the pulsating direct current after rectification is filtered by electric capacity C2
Accumulation of energy, Zener diode Z1 voltage stabilizing, output galvanic current is pressed to load.Resistance R1 is the charge discharging resisting of electric capacity C1 after power down
Resistance.Diode D2 is in order to the negative half period in exchange provides discharge and recharge path to electric capacity C1.
If all regarding the circuit after C1 as load, then be equivalent to C1 and a resistant series in alternating current power supply
In path.Electric capacity is all resistive with resistance under exchanging, dividing potential drop of connecting, it is achieved capacitance decompression.Owing to being step-down applications, one
As the capacitive reactance of electric capacity much larger than the impedance of resistance, the electric current of circuit is determined by electric capacity C1, presents constant-current characteristics.
If if high direct voltage pulsafeeder is not pulsed for a long time, only flip-flop, then C1 will lose efficacy, electric current leads to
Cross charge discharging resisting resistance R1 powering load and dividing potential drop.Supply current required during in order to maintain static state, the resistance of R1 needs to set
Counting smaller, the electric current flow through is big, causes power consumption on R1 bigger.Even if time dynamically after C1 work, R1 also having
Bigger electric current, causes efficiency to reduce.
Summary of the invention
It is an object of the invention to provide a kind of capacitance decompression power-supply circuit using dynamic electric resistor, with extremely low cost and
The power taking from high-pressure pulsating direct current of the highest efficiency, is transformed into low pressure for controlling device and provides electric power.
The purpose of the present invention can be achieved through the following technical solutions:
Using the capacitance decompression power-supply circuit of dynamic electric resistor, this circuit includes diode D1, D2, and the electricity of series stack
Hold C, current control unit and diode D；Described current control unit is made up of gate pole divider resistance Rg and switch Q, and switch Q is originally
Example uses MOSFET, it is possible to use IGBT or BJT；
Wherein, just pulse power V is being accessed after the electric capacity C of described series stack, current control unit are in parallel with diode D
Pole；Described diode D anode is connected to diode D3 negative electrode, and gate pole divider resistance Rg is connected to electric capacity Ct, and the S pole of switch Q is even
It is connected to resistance Rs, resistance Rs and is connected to diode D1 anode；Gate pole divider resistance Rg with switch Q gate pole is connected, switch Q gate pole and
Bipolar transistor T1 colelctor electrode connects；
Described electric capacity C is connected to diode D1 anode, and diode D1 negative electrode connects load, is equivalent to resistance RL；Electric capacity Ct,
Bipolar transistor T1 emitter stage, resistance Rs and electric capacity C are connected between diode D3, D1；Diode D1 with load RL it
Intermediate node is connected to the input test side of controller U1, and the output of controller U1 is connected to switch Q1 gate pole, and the D pole of switch Q1 is even
Being connected to switch the gate pole of Q, GND is accessed after collecting with diode D2 anode, load RL in the S pole of switch Q1.
Described bipolar transistor T1 and resistance Rs forms current constant control loop, when switching electric current increase on Q, series connection
Voltage on resistance Rs increases, and bipolar transistor T1 can be made to tend to conducting, causes the gate voltage switching Q to reduce, and reduction is opened
Close the electric current of Q, it is achieved current constant control.
The voltage that each described current control unit is born is equal.
Multiple described electric capacity C series stack are together.
Multiple described current control unit series stack are together；Described switch Q is MOSFET, BJT or IGBT.
Multiple described diode D series stack are together, it is provided that the back discharge path of electric capacity Ct, and electric capacity Ct controls switch
The opening time of Q.
Beneficial effects of the present invention: the present invention can dynamically regulate the size of charge discharging resisting resistance, can produce ratio when needing
Bigger electric current, can maintain loaded work piece when not pulsing for a long time；Time dynamically, can be switched to big resistance pattern, electric current is basic
Thered is provided by decompression capacitor, reduce power consumption and improve efficiency.
Accompanying drawing explanation
For the ease of it will be appreciated by those skilled in the art that the present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the working circuit diagram of halfwave rectifier formula capacitance decompression；
Fig. 2 is circuit diagram of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, those of ordinary skill in the art obtained under not making creative work premise all other
Embodiment, broadly falls into the scope of protection of the invention.
Using the capacitance decompression power-supply circuit of dynamic electric resistor, see Fig. 2, this circuit includes diode D1, D2, and string
The decompression capacitor C of connection stacking, current control unit and diode D；
In Fig. 2,3 electric capacity C series stack together, without loss of generality, according to high-pressure pulsating DC voltage, can be flexible
The connection selecting the number of series stack electric capacity C, series stack electric capacity C and left side circuit nor is it necessary that, broadly falls into this specially
Profit protection domain.
In Fig. 2, gate pole divider resistance Rg and switch Q forms most basic current control unit；Fig. 2 has only drawn 3 strings
The current control unit that connection is stacked.Without loss of generality, according to high-pressure pulsating DC voltage, series stack can be selected flexibly
The number of folded current control unit, the connection between current control unit and the right side electric capacity C of series stack nor is it necessary that
, switch Q can be the MOSFET in the design figure, it is possible to use BJT, even IGBT, broadly falls into this patent protection domain.
In Fig. 2,3 series stack diode D together provides the back discharge path of electric capacity Ct, and electric capacity Ct controls to open
Close the opening time of Q.Without loss of generality, according to high-pressure pulsating DC voltage, back discharge Diode series can be selected flexibly
The number of stacking, the connection between diode D and the right current switch unit of series stack nor is it necessary that, series stack
Diode D even can also be connected with electric capacity C, broadly fall into this patent protection domain.
Wherein, pulse power V positive pole, arteries and veins are accessed after the electric capacity C of series stack, current control unit are in parallel with diode D
Rush power supply V negative pole and access GND；
Diode D anode is connected to diode D3 negative electrode, and resistance Rg is connected to electric capacity Ct, and the S pole of switch Q is connected to resistance
Rs, resistance Rs are connected to diode D1 anode；Gate pole divider resistance Rg is connected with the gate pole of switch Q, and the gate pole of switch Q is with bipolar
Transistor npn npn T1 colelctor electrode connects；
Decompression capacitor C is connected to diode D1 anode, and diode D1 negative electrode connects load, equivalent resistance RL；Electric capacity Ct, double
Bipolar transistor T1 emitter stage, resistance Rs and electric capacity C are connected between diode D3, D1；Between diode D1 and resistance RL
Node connects the input test side of controller U1, and the output of controller U1 is connected to switch Q1 gate pole, and the D pole of switch Q1 is connected to
The gate pole of switch Q, GND is accessed after collecting with diode D2 anode, load RL in the S pole of switch Q1；
Bipolar transistor T1 and resistance Rs forms current control loop.When the electric current on switch Q increases, series resistance Rs
On voltage increase, can make bipolar transistor T1 tend to conducting, cause switch Q gate voltage reduce, reduce switch Q electricity
Stream, thus reach the purpose of current constant control.
Due to the dividing potential drop of gate pole divider resistance Rg, the voltage that each current control unit is born is equal.Control heap
Being stacked in the switch Q break-make of bottom, can make all of series stack Q break-make together, each switch Q of series connection is in safety
In running voltage.The low tension switch Q series stack that can use low cost is applied to environment under high pressure, reduces system cost.
When loading RL and need not electric current, i.e. the overtension at controller (Controller) U1 detection load RL two ends
Time, controller (Controller) U1 controls switch Q1 conducting.The gate pole making current-controlled switch Q meets GND, forces to make to flow through out
The electric current closing Q is 0, it is achieved for being electrically turn off.Without loss of generality, other can broadly fall into this patent with the method that force switch Q turns off
Protection domain.
Protection element and circuit has been fallen to put it more simply, Fig. 2 simplifies.
Work process:
Time static, the HVDC that the output of high-pressure pulsating DC source is stable.This HVDC is at the biggest resistance of resistance
Rg is upper forms small DC current, and this small DC current charges to electric capacity Ct.When the voltage on electric capacity Ct exceedes switch Q
After the threshold voltage opened, Q is open-minded for switch, and the electric current of switch Q is determined by transistor T1 and sample resistance Rs, and supply load RL makes
With.
Time dynamically, high-pressure pulsating DC source output zero level, now the electric charge on electric capacity Ct is reversed by diode D
Discharge.When high-pressure pulsating DC source exports high pressure again, it is not enough in flowing through the Weak current short time on resistance Rg
Accumulating enough voltage on electric capacity Ct makes switch Q open-minded, and equivalent resistance is the big valued resistor Rg of multiple series stack.The highest
Pressure Voltage pulsating direct-current supply is substantially is powered to load RL by electric capacity C.
If the charging interval that the pulse period of high-pressure pulsating DC source is less than electric capacity Ct, so that it may so that flowing through switch Q
Big electric current be cut off always, it is achieved the highest power supplying efficiency.If long-time high-pressure pulsating DC source is failure to actuate, electric capacity Ct
After the voltage that upper accumulation is enough, it is possible to automatically switch to bigger quiescent current.
When switching Q1 and being opened by control, force to make switch Q close, and make electric capacity Ct discharge, the electric current of roof-cut resistence Q.
Will also pass through diode D3 and switch Q1 to GND by the fluctuating signal of electric capacity C, stop load supplying.Switch Q1 is controlled
Device processed (Controller) U1 controls, and when load Rl overtension being detected, forces to be switched to energy saver mode, it is achieved accurate
Supply of electric power.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.Preferred embodiment is the most detailed
Describe all of details, be also not intended to the detailed description of the invention that this invention is only described.Obviously, according to the content of this specification,
Can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is to preferably explain the present invention
Principle and actual application so that skilled artisan can be best understood by and utilize the present invention.The present invention is only
Limited by claims and four corner thereof and equivalent.
Claims (6)
1. use the capacitance decompression power-supply circuit of dynamic electric resistor, it is characterised in that this circuit includes commutation diode D1, D2, with
And the electric capacity C of series stack, current control unit and diode D；Described current control unit is by gate pole divider resistance Rg and opens
Close Q composition；
Wherein, power supply V positive pole is accessed after the electric capacity C of described series stack, current control unit are in parallel with diode D；Described two
Pole pipe D anode is connected to diode D3 negative electrode, and resistance Rg is connected to electric capacity Ct, and the S pole of switch Q is connected to resistance Rs, resistance Rs
It is connected to diode D1 anode；Gate pole divider resistance Rg is connected with switch Q gate pole, switch Q gate pole and bipolar transistor T1 collection
Electrode connects；
Described electric capacity C is connected to diode D1 anode, and diode D1 negative electrode connects load, and the equivalent resistance of this load is RL；Electricity
Appearance Ct, bipolar transistor T1 emitter stage, resistance Rs and electric capacity C are connected between diode D3, D1；Diode D1 and load
The intermediate node of RL connects the input test side of controller U1, and the output of controller U1 is connected to switch Q1 gate pole, the D pole of switch Q1
The gate pole of connecting valve Q, GND is accessed after collecting with diode D2 anode, load RL in the S pole of switch Q1.
The capacitance decompression power-supply circuit of use dynamic electric resistor the most according to claim 1, it is characterised in that described ambipolar
Transistor T1 and resistance Rs forms current constant control loop, and when the electric current switched on Q increases, the voltage on the resistance Rs of series connection increases
Add, bipolar transistor T1 can be made to tend to conducting, cause the gate voltage switching Q to reduce, thus reduce the electric current of switch Q, real
Existing current constant control.
The capacitance decompression power-supply circuit of use dynamic electric resistor the most according to claim 1, it is characterised in that each described electricity
The gate pole divider resistance Rg that flow control unit is used is equal, and the voltage that the most each current control unit is born is phase
Deng.
The capacitance decompression power-supply circuit of use dynamic electric resistor the most according to claim 1, it is characterised in that multiple described electricity
Hold C series stack together, including, but not limited to 3 capacitances in series stackings.
The capacitance decompression power-supply circuit of use dynamic electric resistor the most according to claim 1, it is characterised in that multiple described electricity
Flow control unit series stack together, including, but not limited to 3 current control unit series stack；Described switch Q is showing
Intention is MOSFET, can also be BJT or IGBT.
The capacitance decompression power-supply circuit of use dynamic electric resistor the most according to claim 1, it is characterised in that multiple described two
Pole pipe D series stack together, including, but not limited to 3 diode D series stack, is used for providing the back discharge of electric capacity Ct
Path, electric capacity Ct controls the opening time of switch Q.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802806.1A CN106329919B (en) | 2016-09-05 | 2016-09-05 | Use the capacitance decompression power-supply circuit of dynamic electric resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802806.1A CN106329919B (en) | 2016-09-05 | 2016-09-05 | Use the capacitance decompression power-supply circuit of dynamic electric resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106329919A true CN106329919A (en) | 2017-01-11 |
| CN106329919B CN106329919B (en) | 2018-12-25 |
Family
ID=57786448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610802806.1A Active CN106329919B (en) | 2016-09-05 | 2016-09-05 | Use the capacitance decompression power-supply circuit of dynamic electric resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106329919B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070201A (en) * | 2017-04-14 | 2017-08-18 | 中国电力科学研究院 | One kind is with line feeder fiber composite overhead ground wire HVDC conversion electric power system and method |
| CN107425718A (en) * | 2017-08-10 | 2017-12-01 | 郑州云海信息技术有限公司 | A kind of DC decompression adjusts circuit structure |
| CN110136940A (en) * | 2019-05-20 | 2019-08-16 | 国网陕西省电力公司西安供电公司 | One kind is based on capacitor series connection constant-current source high pressure energy taking device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2622936Y (en) * | 2002-12-17 | 2004-06-30 | 金海亮 | Two-line system electronic switch general mains |
| JP2011199985A (en) * | 2010-03-18 | 2011-10-06 | Xikit Inc | Dc-dc converter |
| CN103227573A (en) * | 2013-05-06 | 2013-07-31 | 陈军 | Alternating-current voltage reduction micro-current supply circuit |
| CN103384436A (en) * | 2013-08-02 | 2013-11-06 | 广州视源电子科技股份有限公司 | Light-emitting diode (LED) backlight constant-current circuit |
| CN204258650U (en) * | 2014-12-05 | 2015-04-08 | 宁波新尚智能电气有限公司 | Resistance-capacitance depressurization power circuit |
| CN105356753A (en) * | 2015-11-11 | 2016-02-24 | 中国电子科技集团公司第二十九研究所 | High voltage electronic analog load circuit |
-
2016
- 2016-09-05 CN CN201610802806.1A patent/CN106329919B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2622936Y (en) * | 2002-12-17 | 2004-06-30 | 金海亮 | Two-line system electronic switch general mains |
| JP2011199985A (en) * | 2010-03-18 | 2011-10-06 | Xikit Inc | Dc-dc converter |
| CN103227573A (en) * | 2013-05-06 | 2013-07-31 | 陈军 | Alternating-current voltage reduction micro-current supply circuit |
| CN103384436A (en) * | 2013-08-02 | 2013-11-06 | 广州视源电子科技股份有限公司 | Light-emitting diode (LED) backlight constant-current circuit |
| CN204258650U (en) * | 2014-12-05 | 2015-04-08 | 宁波新尚智能电气有限公司 | Resistance-capacitance depressurization power circuit |
| CN105356753A (en) * | 2015-11-11 | 2016-02-24 | 中国电子科技集团公司第二十九研究所 | High voltage electronic analog load circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070201A (en) * | 2017-04-14 | 2017-08-18 | 中国电力科学研究院 | One kind is with line feeder fiber composite overhead ground wire HVDC conversion electric power system and method |
| CN107425718A (en) * | 2017-08-10 | 2017-12-01 | 郑州云海信息技术有限公司 | A kind of DC decompression adjusts circuit structure |
| CN107425718B (en) * | 2017-08-10 | 2020-02-07 | 郑州云海信息技术有限公司 | Direct current step-down regulating circuit structure |
| CN110136940A (en) * | 2019-05-20 | 2019-08-16 | 国网陕西省电力公司西安供电公司 | One kind is based on capacitor series connection constant-current source high pressure energy taking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106329919B (en) | 2018-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI530072B (en) | Capacitance discharge circuit and power converter using the same | |
| CN106787088B (en) | Self powered supply applied to discontinuous piezoelectric energy acquisition system manages circuit | |
| CN102843019B (en) | A kind of filter circuit | |
| CN103327694A (en) | Silicon controlled dimming LED drive circuit | |
| CN203911743U (en) | Electronic device and capacitor discharge circuit thereof | |
| CN106301031A (en) | Integrated circuit and switching power unit | |
| CN106329919A (en) | Capacitor step-down power taking circuit using dynamic resistance | |
| CN108649792A (en) | A kind of Boost circuit, Switching Power Supply, power supply system and control method | |
| CN203313500U (en) | Silicon controlled dimming LED driving circuit | |
| CN203660880U (en) | Two-stage boost topological circuit | |
| CN104021978A (en) | Constant-current charging switching device for switching-on switching-off capacitor of permanent magnet vacuum switch and control method thereof | |
| CN105763035A (en) | Method and circuit for improving low-temperature starting capacity | |
| CN101927211B (en) | High-voltage power device for electrostatic precipitator | |
| CN202759634U (en) | LED drive circuit without auxiliary winding | |
| CN107294393A (en) | A kind of low cost and high reliability Yi nationality medicine production isolation type switch power | |
| CN106992668A (en) | A kind of alternating current-direct current Mixed design dc source | |
| CN209016790U (en) | A kind of Dual-power automatic switching DC power-supply circuit | |
| CN104411035A (en) | LED drive circuit without auxiliary winding for power supply | |
| CN205123587U (en) | Switching power supply of super wide region input | |
| CN208522664U (en) | Wide input voltage regulator rectifier circuit | |
| CN204392101U (en) | AC/DC circuit and switching power supply | |
| CN207369369U (en) | LED power and LED display device | |
| CN203707751U (en) | RCC overvoltage protection circuit | |
| CN214799289U (en) | Power-off discharge circuit of power supply | |
| CN105915086B (en) | High-efficiency AC/D/C power circuit and its control method and method of supplying power to |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |