CN108512408A - DC power supply micro-current start-up circuit - Google Patents
DC power supply micro-current start-up circuit Download PDFInfo
- Publication number
- CN108512408A CN108512408A CN201810206016.6A CN201810206016A CN108512408A CN 108512408 A CN108512408 A CN 108512408A CN 201810206016 A CN201810206016 A CN 201810206016A CN 108512408 A CN108512408 A CN 108512408A
- Authority
- CN
- China
- Prior art keywords
- resistance
- current
- capacitance
- power supply
- negative resistance
- 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.)
- Pending
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
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of DC power supply micro-current start-up circuits, including current-limiting circuit, accumulator and negative resistance switch；Current-limiting circuit：High-voltage DC power supply is subjected to current limliting, obtains micro-current；Accumulator：Micro-current is stored；Negative resistance switchs：When voltage reaches setting value in accumulator, negative resistance switch is opened；When flowing through the electric current of negative resistance switch less than the holding electric current that negative resistance switchs, negative resistance switch is closed.The present invention uses the DC power supply micro-current start-up circuit that series limiting resistor, storage capacitor and negative resistance switch member are combined into, and has many advantages, such as simple in structure, few using component, only lossy in DC power convertor startup moment.
Description
Technical field
The present invention relates to a kind of start-up circuits, and in particular, to a kind of DC power supply micro-current start-up circuit.
Background technology
On startup, what it is due to control circuit is low tension (generally within DC20V) to DC power convertor, and electric
The input voltage in source is generally in AC220V or more, so generally adding an auxiliary winding on the transformer of supply convertor.
After power initiation, control circuit is generally powered by auxiliary winding, but the auxiliary winding of supply convertor transformer on startup
It is not no voltage output, so many traditional supply convertors are by a current-limiting resistance of connecting to DC high-voltage power supply,
Start moment control circuit in converter in this way to power by current-limiting resistance.
But the method for traditional series limiting resistor is when supply convertor works normally, because its current limliting cannot be cut off
So causing to select the serious even resistance of small fever to be burned in resistance, and also big or current limliting electricity is lost in resistance loop
Resistance resistance value, which has been selected big, can cause it to can not meet the starting current that control chip starts needs.
The shortcomings that for series limiting resistor, existing means are that switch (half is added on the basis of series limiting resistor
Conductor switching tube), the circuit of current-limiting resistance is cut off when supply convertor start completion；But the device meeting added in this way
Increase many costs and occupies the prodigious area of pcb board.
Invention content
For the defects in the prior art, the object of the present invention is to provide a kind of DC power supply micro-current start-up circuits.
According to DC power supply micro-current start-up circuit provided by the invention, including current-limiting circuit, accumulator and negative resistance
Property switch；
Current-limiting circuit：High-voltage DC power supply is subjected to current limliting, obtains micro-current；
Accumulator：Micro-current is stored；
Negative resistance switchs：When voltage reaches setting value in accumulator, negative resistance switch is opened；It is opened when flowing through negative resistance
When the electric current of pass is less than the holding electric current that negative resistance switchs, negative resistance switch is closed.
Preferably, the negative resistance switch includes following any or various structures：
-- the diode with Trigger Function；
-- metal-oxide-semiconductor；
-- triode；
--SCR。
Preferably, also include capacitance C21；The current-limiting circuit includes resistance R17, and the accumulator includes capacitance C12,
The negative resistance switch includes bidirectional trigger diode D9；
One end of resistance R17 forms the connecting pins high-voltage DC power supply+BUS, and the other end of resistance R17 is connected respectively to capacitance
One end of C12, one end of bidirectional trigger diode D9；The other end of capacitance C12 is grounded；The other end of bidirectional trigger diode D9
It is connected to one end of capacitance C21 and forms DC-DC control circuits connecting pin；The other end of capacitance C21 is grounded.
Preferably, also include inductance L2；
One end of inductance L2 is connected respectively to one end of resistance R17, capacitance C12, the other end of inductance L2 and two-way triggering
One end of diode D9 is connected.
Preferably, also include zener diode ZD1；
One end of zener diode ZD1 be connected respectively to the other end of resistance R17, one end of capacitance C12, inductance L2 one
End, the other end ground connection of zener diode ZD1.
Preferably, also include zener diode ZD1, inductance L2, resistance R2, resistance R16 and capacitance C21；The current limliting
Circuit includes resistance R17, and the accumulator includes capacitance C12, and the negative resistance switch includes SCR；
One end of resistance R17 forms the connecting pins high-voltage DC power supply+BUS, and the other end of resistance R17 is connected respectively to capacitance
One end of C12, one end of zener diode ZD1, inductance L2 one end；The other end of capacitance C12 is grounded；Zener diode ZD1
The other end ground connection；The other end of inductance L2 be connected respectively to one end of resistance R2, SCR anode；The other end of resistance R2 point
It is not connected to one end of resistance R16, the control pole of SCR；The other end of resistance R16 is grounded；The cathode of SCR is connected to capacitance C12
One end and form DC-DC control circuits connecting pin；The other end of capacitance C21 is grounded.
Preferably, it is the equivalent resistance being made of voltage-stabiliser tube by resistance R2 and resistance R16.
Compared with prior art, the present invention has following advantageous effect：
1, the micro- electricity of DC power supply that the present invention is combined into using series limiting resistor, storage capacitor and negative resistance switch member
Start-up circuit is flowed, is had many advantages, such as simple in structure, few using component, only lossy in DC power convertor startup moment.
2, when DC power convertor starts, the present invention can give the control circuit of DC converter to provide maximum hundreds of millis
The electric current of peace, when the transformer of DC power convertor auxiliary winding energy bio-occlusion control circuit provide operating voltage when
It waits, which is stopped, and then avoids that current-limiting resistance overheat is burnt out, electric current cannot be satisfied control core
Piece starting current occupies the deficiencies of volume is big.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is DC power supply micro-current start-up circuit hardware block diagram provided by the invention；
Fig. 2 is circuit structure diagram of the invention in embodiment 1；
Fig. 3 is circuit structure diagram of the invention in embodiment 2；
Fig. 4 is circuit structure diagram of the invention in embodiment 3；
Fig. 5 is circuit structure diagram of the invention in embodiment 4.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
In the description of the present invention, it is to be understood that, term "upper", "lower", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is orientation based on ... shown in the drawings or position
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, device is not indicated or implied the indicated or element is necessary
With specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Basic embodiment：
As shown in Figure 1, DC power supply micro-current start-up circuit provided by the invention include current-limiting circuit, accumulator and
Negative resistance switchs；Current-limiting circuit：High-voltage DC power supply is subjected to current limliting, obtains micro-current (Cranial
Electrotherapy)；Accumulator：Micro-current is stored；Negative resistance switchs：When voltage reaches setting in accumulator
When value, negative resistance switch is opened；When flowing through the electric current of negative resistance switch less than the holding electric current that negative resistance switchs, negative resistance is opened
It closes.
Current-limiting circuit final purpose is (to be generally tens a micro-current is generated by current-limiting circuit from high-voltage DC power supply
Milliampere), and it is transported to storage capacitor；Current-limiting circuit is generally made of various types of resistance or constant-current circuit.Storage capacitor
Effect is exactly that the micro-current to come from current-limiting circuit conveying is stored.Storage capacitor generally selects capacitance, works as storage capacitor
The quantity of electric charge of accumulation is more, and the voltage of capacitance is higher.The effect of negative resistance switch is exactly when the voltage for detecting storage capacitor
Reach open-minded when setting value, the previously stored electric energy of storage capacitor is transported to DC power convertor by negative resistance switch at this time
Control circuit；After negative resistance switch is triggered, it can be always maintained at conducting state, until flowing through its electric current less than its guarantor
Hold electric current.Negative resistance switch is typically chosen diode with Trigger Function, metal-oxide-semiconductor, triode, silicon-controlled (SCR) etc. and partly leads
The circuit of body device composition.
Each preference of basic embodiment is specifically described below：
Embodiment 1：
As shown in Fig. 2, DC power supply micro-current start-up circuit provided by the invention also includes capacitance C21；The current limliting electricity
Road includes resistance R17, and the accumulator includes capacitance C12, and the negative resistance switch includes bidirectional trigger diode D9.Resistance
One end of R17 forms the connecting pins high-voltage DC power supply+BUS, and the other end of resistance R17 is connected respectively to one end of capacitance C12, double
To one end of diac D9；The other end of capacitance C12 is grounded；The other end of bidirectional trigger diode D9 is connected to capacitance
One end of C21 simultaneously forms DC-DC control circuits connecting pin；The other end of capacitance C21 is grounded.
+ BUS is the busbar power supply of DC converter, and resistance R17 effects are current limlitings, and C12 effects are storage capacitors, two-way to touch
Hair diode D9 is negative resistance switch；When DC power convertor electrifying startup moment ,+BUS voltages are generated by current-limiting resistance
One micro-current is to storage capacitor C12, when the voltage of capacitance C12 reaches bidirectional trigger diode D9 trigger threshold voltages, two poles
Pipe D9 conductings, bidirectional trigger diode D9 ends when capacitance C12 voltages and equal capacitance C21 voltages, but capacitance C21 at this time
On voltage VCCS can meet DC power convertor completely from starting to the required electric energy of normal work.
Embodiment 2：
The present embodiment increases an inductance L2 on the basis of 1 structure of embodiment.As shown in figure 3, one end of inductance L2
It is connected respectively to one end of resistance R17, capacitance C12, the other end of inductance L2 is connected with one end of bidirectional trigger diode D9.Electricity
Sense L2 is for the Q values of increase circuit in bidirectional trigger diode D9 triggering and conductings and plays inhibition electric current rate of climb work
With so that triggering moment electric current excessive will not cause bidirectional trigger diode D9 to be burned, and electric current is smoother to each device
The impact of part also has prodigious reduction.
Embodiment 3：
The present embodiment increases a zener diode ZD1 on the basis of 2 structure of embodiment.As shown in figure 4, voltage stabilizing two
One end of pole pipe ZD1 is connected respectively to one end of the other end of resistance R17, one end of capacitance C12, inductance L2, zener diode
The other end of ZD1 is grounded.Zener diode ZD1 be used for after converter starts successfully so that bidirectional trigger diode D9 lose it is tactile
Clockwork spring part thereby protects bidirectional trigger diode D9, while can also play the role of protecting storage capacitor.
Embodiment 4：
Bidirectional trigger diode D9 in embodiment 3 has been substituted for SCR by the present embodiment, increases resistance R2 and resistance
R16.As shown in figure 5, one end of resistance R17 forms the connecting pins high-voltage DC power supply+BUS, the other end of resistance R17 is separately connected
To one end of capacitance C12, one end of zener diode ZD1, inductance L2 one end；The other end of capacitance C12 is grounded；Two pole of voltage stabilizing
The other end of pipe ZD1 is grounded；The other end of inductance L2 be connected respectively to one end of resistance R2, SCR anode；Resistance R2's is another
Hold the control pole of one end, SCR for being connected respectively to resistance R16；The other end of resistance R16 is grounded；The cathode of SCR is connected to capacitance
One end of C12 simultaneously forms DC-DC control circuits connecting pin；The other end of capacitance C21 is grounded.It thus can be by the way that resistance be arranged
The ratio setting SCR's of R2 and resistance R16 opens condition, the inherent characteristic without being limited by bidirectional trigger diode D9.It is excellent
Selection of land, resistance R2 can also be replaced with resistance R16 with voltage-stabiliser tube, that is to say, that resistance R2 and resistance R16 is by voltage-stabiliser tube structure
At equivalent resistance.
Operation principle：The effect of power supply current-limiting circuit is when micro-current start-up circuit works due to from DC high-voltage
Source takes electricity, so with current-limiting circuit the very little of current limit；The effect of storage capacitor is micro- what is come from current-limiting circuit
Low current first stores, when the voltage of storage capacitor reaches the condition of setting, the conducting of negative resistance switch triggering, and energy storage
The previously stored electric energy of capacitance can be supplied to the control circuit of DC power convertor to work.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the absence of conflict, the feature in embodiments herein and embodiment can arbitrary phase
Mutually combination.
Claims (7)
1. a kind of DC power supply micro-current start-up circuit, which is characterized in that opened comprising current-limiting circuit, accumulator and negative resistance
It closes；
Current-limiting circuit：High-voltage DC power supply is subjected to current limliting, obtains micro-current；
Accumulator：Micro-current is stored；
Negative resistance switchs：When voltage reaches setting value in accumulator, negative resistance switch is opened；When flow through negative resistance switch
When electric current is less than the holding electric current that negative resistance switchs, negative resistance switch is closed.
2. DC power supply micro-current start-up circuit according to claim 1, which is characterized in that the negative resistance, which switchs, includes
Any below or various structures：
-- the diode with Trigger Function；
-- metal-oxide-semiconductor；
-- triode；
--SCR。
3. DC power supply micro-current start-up circuit according to claim 1 or 2, which is characterized in that also include capacitance C21；
The current-limiting circuit includes resistance R17, and the accumulator includes capacitance C12, and the negative resistance switch includes two-way triggering two
Pole pipe D9；
One end of resistance R17 forms the connecting pins high-voltage DC power supply+BUS, and the other end of resistance R17 is connected respectively to capacitance C12
One end, bidirectional trigger diode D9 one end；The other end of capacitance C12 is grounded；The other end of bidirectional trigger diode D9 connects
It is connected to one end of capacitance C21 and forms DC-DC control circuits connecting pin；The other end of capacitance C21 is grounded.
4. DC power supply micro-current start-up circuit according to claim 3, which is characterized in that also include inductance L2；
One end of inductance L2 is connected respectively to one end of resistance R17, capacitance C12, the other end of inductance L2 and two pole of two-way triggering
One end of pipe D9 is connected.
5. DC power supply micro-current start-up circuit according to claim 4, which is characterized in that also include zener diode
ZD1；
One end of zener diode ZD1 is connected respectively to one end of the other end of resistance R17, one end of capacitance C12, inductance L2,
The other end of zener diode ZD1 is grounded.
6. DC power supply micro-current start-up circuit according to claim 1 or 2, which is characterized in that also include two pole of voltage stabilizing
Pipe ZD1, inductance L2, resistance R2, resistance R16 and capacitance C21；The current-limiting circuit includes resistance R17, the accumulator packet
C12 containing capacitance, the negative resistance switch includes SCR；
One end of resistance R17 forms the connecting pins high-voltage DC power supply+BUS, and the other end of resistance R17 is connected respectively to capacitance C12
One end, one end of zener diode ZD1, inductance L2 one end；The other end of capacitance C12 is grounded；Zener diode ZD1's is another
One end is grounded；The other end of inductance L2 be connected respectively to one end of resistance R2, SCR anode；The other end of resistance R2 connects respectively
It is connected to one end of resistance R16, the control pole of SCR；The other end of resistance R16 is grounded；The cathode of SCR is connected to the one of capacitance C12
It holds and forms DC-DC control circuits connecting pin；The other end of capacitance C21 is grounded.
7. DC power supply micro-current start-up circuit according to claim 6, which is characterized in that by resistance R2 and resistance R16
It is the equivalent resistance being made of voltage-stabiliser tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810206016.6A CN108512408A (en) | 2018-03-13 | 2018-03-13 | DC power supply micro-current start-up circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810206016.6A CN108512408A (en) | 2018-03-13 | 2018-03-13 | DC power supply micro-current start-up circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108512408A true CN108512408A (en) | 2018-09-07 |
Family
ID=63376567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810206016.6A Pending CN108512408A (en) | 2018-03-13 | 2018-03-13 | DC power supply micro-current start-up circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108512408A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474170A (en) * | 2018-10-31 | 2019-03-15 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | A kind of seabed is plugged into the power circuit of box |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2884686Y (en) * | 2006-01-27 | 2007-03-28 | 太原理工天成科技股份有限公司 | Power cell auxiliary power source starting circuit of high voltage converter |
| CN102195462A (en) * | 2011-05-26 | 2011-09-21 | 广州金升阳科技有限公司 | Start-up circuit with high-tension power supply |
-
2018
- 2018-03-13 CN CN201810206016.6A patent/CN108512408A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2884686Y (en) * | 2006-01-27 | 2007-03-28 | 太原理工天成科技股份有限公司 | Power cell auxiliary power source starting circuit of high voltage converter |
| CN102195462A (en) * | 2011-05-26 | 2011-09-21 | 广州金升阳科技有限公司 | Start-up circuit with high-tension power supply |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474170A (en) * | 2018-10-31 | 2019-03-15 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | A kind of seabed is plugged into the power circuit of box |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104219840B (en) | LED switch color temperature regulation controller and LED drive circuit | |
| CN108599117B (en) | A kind of bidirectional, dc solid circuit breaker | |
| CN205544976U (en) | An ac/dc converter | |
| CN204090236U (en) | LED switch color-temperature regulating controller and LED drive circuit | |
| CN205786805U (en) | Flame detection circuit and flame ignition testing circuit | |
| CN108512408A (en) | DC power supply micro-current start-up circuit | |
| CN104852562A (en) | Low-loss universal starting circuit of switching power chip | |
| CN205425008U (en) | Spark tunable frequency's high energy ignition device | |
| CN208143088U (en) | DC power supply micro-current start-up circuit | |
| CN105162313A (en) | Flyback switching power supply | |
| CN204929332U (en) | LED light of safety and stability | |
| CN103857109B (en) | A kind of constant-current voltage-stabilizing drive circuit and light fixture | |
| CN206850404U (en) | A kind of line under-voltage protection circuit with the input of retarding window wide scope | |
| CN114709109A (en) | Relay slow discharge driving circuit | |
| CN109412400A (en) | Inverse-excitation type switch power-supply and its under-voltage protecting circuit | |
| CN208078889U (en) | A kind of circuit that can inhibit exchange input inrush current | |
| CN205544356U (en) | Adopt constant voltage charge circuit that floats ground formula | |
| CN105098705B (en) | A kind of earth leakage protective device | |
| CN208767783U (en) | Electric discharge device | |
| CN209709680U (en) | Direct current supply switching circuit | |
| CN206807281U (en) | Capacitor discharging circuit and modular power source and redundant system with the circuit | |
| CN206349938U (en) | A kind of synchronous rectification switch, chip and circuit | |
| CN106334857B (en) | A kind of arc welding arc ignition circuit | |
| CN105527482B (en) | A kind of electric system current monitoring system | |
| CN204704844U (en) | Shake triggers the electric-arc lighter of igniting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |