CN108023471A - A kind of soft upper electric system, equipment and its soft powering method - Google Patents
A kind of soft upper electric system, equipment and its soft powering method Download PDFInfo
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- CN108023471A CN108023471A CN201610962235.8A CN201610962235A CN108023471A CN 108023471 A CN108023471 A CN 108023471A CN 201610962235 A CN201610962235 A CN 201610962235A CN 108023471 A CN108023471 A CN 108023471A
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- 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
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Abstract
The present invention provides a kind of soft upper electric system, equipment and its soft powering method, soft upper electric system includes：Bidirectional thyristor, uncontrollable rectifier unit, boost boosting units and electrolytic capacitor；One end of bidirectional thyristor and one end of AC power connect, and the other end is connected with the first end of uncontrollable rectifier unit；4th end of uncontrollable rectifier unit and the other end of AC power connect, and two output terminals are connected with boost boosting units, and boost boosting units are connected with electrolytic capacitor；Switching Power Supply is connected to the both ends of electrolytic capacitor；The change of the alternating voltage that bidirectional thyristor is provided with AC power and on or off, and AC power charges electrolytic capacitor in conducting, when the voltage of electrolytic capacitor reaches maximum, realizes and the soft of rear class Switching Power Supply is powered on.The present invention to power on current overshoot small；Circuit structure is simple, and element used is few, applied widely；Electrochemical capacitor life is grown.
Description
Technical field
The present invention relates to converters technical field, more particularly to it is a kind of based on thyristor without current-limiting resistance
Soft upper electric system, equipment and its soft powering method.
Background technology
Technics of Power Electronic Conversion device completes electric energy by what electric semiconductor equipment, busbar and instrument etc. formed
The overall control circuit of one of property transition.The purpose of Power Electronic Technique research is exactly to utilize high performance power semiconductor device
Part, is controlled these electric power point switch devices using advanced control theory and means, and electrical energy form is turned with reaching
The requirement changed.At present, the Technics of Power Electronic Conversion device application range of single phase alternating current power supply power supply is quite varied, wherein single-phase active
Power factor corrector has been widely applied to the front stage circuits that frequency-conversion domestic electric appliances power circuit hands over orthogonal converter, realizes AC-
DC is converted and harmonic carcellation pollution.There is bridge single-phase active power factor corrector to include two parts：Single-phase diode uncontrollable rectifier
Bridge and boost booster circuits.Single-phase power factor correcting device output terminal is connected with electrolytic capacitor, is after filtered capacitor filtering
Rear class Switching Power Supply is powered.To cause Switching Power Supply to obtain stable voltage, it is necessary to it is defeated to reduce single-phase power factor correcting device
Go out the ripple of voltage, it is therefore desirable to using the electrolytic capacitor of large capacity, but when single phase alternating current power supply powers on, the electricity of large capacity
Solution capacitance can cause big dash current, cause current waveform distortion to cause harmonic pollution, more seriously, high current may
Circuit element is destroyed, causes circuit to start or fault, the normal of circuit is opened so taking and powering on current limiting measures
It is dynamic to have highly important effect.
In general, series limiting resistor powers on electric current to limit in circuit, according to whether excision current-limiting resistance can be by it
It is divided into two classes：
(1) relay excision current-limiting resistance is utilized after starting；Adopt this method, when cutting off resistance, can cause
The impact of secondary current；
(2) NTC (Negative Temperature Coefficient, the negative temperature coefficient) heat of series connection negative temperature characteristic
Quick resistance, does not cut off current-limiting resistance after startup, adopt this method, and in the case of high current, resistance loss is excessive.
Find there is more or less lack using the soft electrification circuit of current-limiting resistance by the retrieval to the prior art
Fall into, therefore, those skilled in the art is directed to finding a kind of effective soft upper electric system.
The content of the invention
In view of the foregoing deficiencies of prior art, it is an object of the invention to provide a kind of soft upper electric system, equipment and
Its soft powering method, for solve it is of the prior art using current-limiting resistance realize it is soft power on caused by secondary current impact or
The problem of resistance loss is excessive.
In order to achieve the above objects and other related objects, the present invention provides a kind of soft upper electric system, is used for realization described soft
The soft of rear class Switching Power Supply of upper electric system powers on, and the soft upper electric system includes：Bidirectional thyristor, uncontrollable rectifier unit,
Boost boosting units and electrolytic capacitor；One end of the bidirectional thyristor and one end of AC power connect, the other end with it is described
The first end connection of uncontrollable rectifier unit；The first end of the uncontrollable rectifier unit and the other end phase of the bidirectional thyristor
Even, second end is connected with the first end of the boost boosting units, the 3rd end respectively with the boost boosting units second
End is connected with the anode of the electrolytic capacitor, and the 4th end is connected with the other end of the AC power；The boost boosting units
First end be connected with the second end of the uncontrollable rectifier unit；Second end respectively with the 3rd end of the uncontrollable rectifier unit and
The anode connection of the electrolytic capacitor；3rd end is connected with the cathode of the electrolytic capacitor；The rear class Switching Power Supply is connected to
The both ends of the electrolytic capacitor；The change for the alternating voltage that the bidirectional thyristor is provided with the AC power and turn on or close
It is disconnected, and the AC power charges the electrolytic capacitor in conducting；When the voltage of the electrolytic capacitor reaches maximum,
Realization powers on the soft of rear class Switching Power Supply.
In one embodiment of the invention, the uncontrollable rectifier unit includes：First power diode, two pole of the second power
Pipe, the 3rd power diode and the 4th power diode；Wherein, the cathode of first power diode is not controlled whole as described in
The first end of unit is flowed, is connected respectively with the other end of the bidirectional thyristor and the anode of the 3rd power diode, is born
Pole is connected with the anode of second power diode；The anode of second power diode is as the uncontrollable rectifier unit
Second end, the also first end with the boost boosting units is connected；The cathode other end with the AC power and institute respectively
State the anode connection of the 4th power diode；The cathode of 3rd power diode as the uncontrollable rectifier unit the 3rd
End, the respectively cathode with the 4th power diode, the second end of the boost boosting units and the electrolytic capacitor
Anode connects, and anode is connected with the other end of the bidirectional thyristor and the cathode of first power diode respectively；It is described
The second end of the cathode of 4th the power diode cathode with the 3rd power diode, the boost boosting units respectively
It is connected with the anode of the electrolytic capacitor；Fourth end of the anode as the uncontrollable rectifier unit, respectively with the alternating current
The other end in source is connected with the cathode of second power diode.
In one embodiment of the invention, the soft upper electric system further includes the first filter capacitor, first filtered electrical
Appearance is connected between the cathode of first power diode and the anode of the 4th power diode.
In one embodiment of the invention, the boost boosting units include boost inductance, the 5th power diode and
IGBT；First end and the second of the uncontrollable rectifier unit of the one end of the boost inductance as the boost boosting units
End is connected, and the other end is connected with the cathode of the 5th power diode and the collector of the IGBT respectively；5th work(
The cathode of rate diode is connected with the other end of the boost inductance, anode as the boost boosting units the 3rd end with
The cathode of the electrolytic capacitor is connected；The collector of the IGBT other end with the boost inductance and the 5th work(respectively
The cathode of rate diode is connected；Second end of the emitter as the boost boosting units, respectively with the uncontrollable rectifier unit
The 3rd end be connected with the anode of the electrolytic capacitor.
In one embodiment of the invention, the soft upper electric system further includes pull down resistor, and the pull down resistor is connected to
Between the first end and second end of the boost boosting units.
In one embodiment of the invention, the soft upper electric system further includes the second filter capacitor；Second filtered electrical
Hold the both ends for being connected to the electrolytic capacitor.
In one embodiment of the invention, the soft upper electric system further includes the 6th power diode, the 6th power
The cathode of diode is connected with the second end of the uncontrollable rectifier unit, and anode is connected with the cathode of the electrolytic capacitor.
The invention discloses a kind of soft powered devices, it includes soft upper electric system as described above.
The invention also discloses a kind of soft powering method, realize the soft upper electric system rear class Switching Power Supply it is soft on
Electricity, the soft powering method include：Connect the AC power of the soft upper electric system, the boost boostings of the soft upper electric system
The IGBT shut-offs of unit；Charge to the electrolytic capacitor of the soft upper electric system：In the alternating current that the AC power provides
When pressure is increased to close to zero point, the bidirectional thyristor conducting of the soft upper electric system, the two-way crystalline substance of the soft upper electric system
Brake tube, uncontrollable rectifier unit, two pole of boost inductance and the 5th power of the electrolytic capacitor and the boost boosting units
Pipe forms circuit, and the AC power charges the electrolytic capacitor, the voltage rise of the electrolytic capacitor；In the friendship
When the AC voltage drop that galvanic electricity source provides is as low as zero, the bidirectional thyristor shut-off, the AC power is to the electrolysis electricity
Hold and continue to have without charging, the voltage of the electrolytic capacitor；It is described when the voltage of the electrolytic capacitor reaches maximum
IGBT is turned on, and soft power on is realized to the rear class Switching Power Supply.
The invention discloses a kind of soft powering method, realizes that the soft of rear class Switching Power Supply of the soft upper electric system powers on,
The soft powering method includes：Connect the AC power of the soft upper electric system, the boost boosting units of the soft upper electric system
IGBT shut-off；Charge to the electrolytic capacitor of the soft upper electric system：In the alternating voltage liter that the AC power provides
When up to close to zero point, the bidirectional thyristor conducting of the soft upper electric system, the bidirectional thyristor of the soft upper electric system,
Uncontrollable rectifier unit, the 6th power diode and the electrolytic capacitor form circuit, and the electrolytic capacitor is in charged state, institute
State the voltage rise of electrolytic capacitor；When the AC voltage drop that the AC power provides is as low as zero, the bidirectional thyristor
Shut-off, the electrolytic capacitor are in non-charged state, and the voltage of the electrolytic capacitor continues to have；When the electricity of the electrolytic capacitor
When pressure reaches maximum, the IGBT conductings, soft power on is realized to the rear class Switching Power Supply.
As described above, a kind of soft upper electric system, equipment and its soft powering method of the present invention, have bridge is single-phase to have existing
Increase bidirectional thyristor on the basis of Power Factor Corrector as switch, adjusted using the voltage change of AC power two-way
The turn-on and turn-off time of thyristor, so as to control the charging of electrolytic capacitor so that the voltage of electrolytic capacitor can be desirably
Curve is gradually increasing, and effectively extends the service life of electrolytic capacitor；Also, controlled by the turn-on and turn-off of bidirectional thyristor
The gradation charging of electrolytic capacitor so that it is small to power on current overshoot, realizes soft power on.The circuit structure of the present invention is simple, member used
Part is few, and thyristor is cheap, and type selecting is convenient, applied widely.
Brief description of the drawings
Fig. 1 is shown as a kind of circuit principle structure schematic diagram of soft upper electric system disclosed by the embodiments of the present invention.
Fig. 2 is shown as a kind of circuit principle structure schematic diagram of soft upper electric system disclosed in another embodiment of the present invention.
Fig. 3 is shown as a kind of structure diagram of soft powering method disclosed by the embodiments of the present invention.
Fig. 4 is shown as in a kind of soft powering method disclosed by the embodiments of the present invention, the state of bidirectional thyristor and electrolysis
The curve synoptic diagram that the alternating voltage with AC power of the voltage of capacitance changes.
Component label instructions
110 uncontrollable rectifier units
120 Boost boosting units
200 rear class Switching Power Supplies
S31~S33 steps
Embodiment
Illustrate embodiments of the present invention below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.It should be noted that in the case where there is no conflict, following embodiments and implementation
Feature in example can be mutually combined.
Refer to attached drawing.It should be noted that the diagram provided in following embodiments only illustrates this hair in a schematic way
Bright basic conception, then in schema only the display component related with the present invention rather than component count during according to actual implementation,
Shape and size are drawn, and kenel, quantity and the ratio of each component can be a kind of random change during its actual implementation, and its component
Being laid out kenel may also be increasingly complex.
The present invention provides a kind of soft upper electric system, equipment and its soft side of powering on without current-limiting resistance based on thyristor
Method, its by it is existing have bridge single-phase active power factor corrector based on, add bidirectional thyristor as switch, two-way crystalline substance
The conversion for the alternating voltage that brake tube is provided by AC power carries out electrolytic capacitor and on or off, and in ON time
Charging so that power on current adjustment, in the case where not increasing current-limiting resistance, realize soft power on.
Embodiment 1
A kind of soft upper electric system without current-limiting resistance based on thyristor is present embodiments provided, as shown in Figure 1, including：
Bidirectional thyristor S0, uncontrollable rectifier unit 110, boost boosting units 120 and electrolytic capacitor EC1.
Wherein, one end of bidirectional thyristor S0 is connected with one end of AC power, the other end and uncontrollable rectifier unit 120
First end is connected.
Uncontrollable rectifier unit 110 is uncontrollable rectifier bridge, its first end is connected with bidirectional thyristor S0, second end and boost
The first end of boosting unit 120 is connected；3rd end respectively with the second end of boost boosting units and the anode of electrolytic capacitor EC1
It is connected.
Uncontrollable rectifier bridge includes the first power diode D1, the second power diode D2, the 3rd power diode D3 and the
Four power diode D4.Wherein,
First end of the cathode of first power diode D1 as uncontrollable rectifier unit 110, it is another with bidirectional thyristor S0
One end is connected；Anode is connected with the anode of the second power diode and the first end of boost boosting units respectively；
Anode of the cathode of second power diode D2 respectively with AC power and the 4th power diode D4 is connected, anode
As the second end of uncontrollable rectifier unit 110, respectively with the anode of the first power diode D1 and boost boosting units 120
First end connects；
Threeth end of the cathode of 3rd power diode D3 as uncontrollable rectifier unit 110, respectively with two pole of the 4th power
The cathode of pipe D4, the second end of boost boosting units are connected with the anode of electrolytic capacitor EC1；Anode respectively with bidirectional thyristor
The cathode of the other end of S0 and the first power diode D1 connect；
The cathode of 4th power diode the D4 cathode with the 3rd power diode D3, boost boosting units 120 respectively
Second end is connected with the anode of electrolytic capacitor；Fourth end of the anode as uncontrollable rectifier unit 110, it is another with AC power respectively
One end is connected with the cathode of the second power diode D2.
Also, the cathode of the 3rd power diode D3 and the plus earth of the 4th power diode D4.
Boost boosting units use boost booster circuits (the boost converter), it is a kind of common opens
DC voltage booster circuit is closed, for making output voltage be higher than input voltage.Preferably boost booster circuits include boost inductance L1,
5th power diode D5 and IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor)
S1.Also,
First end of the one end of boost inductance L1 as boost boosting units 120, second with uncontrollable rectifier unit 110
End be connected, i.e., the anode with the second power diode D2 of uncontrollable rectifier bridge is connected, the other end respectively with the 5th power diode
The cathode of D5 is connected with the collector of IGBT S1；
The cathode of 5th power diode D5 is connected with the other end of boost inductance L1 and the collector of IGBT S1 respectively,
Threeth end of the anode as boost boosting units 120, is connected with the cathode of electrolytic capacitor EC1；
The collector of IGBT S1 is connected with the other end of boost inductance L1 and the cathode of the 5th power diode D5 respectively；
Second end of the emitter as boost boosting units 120, is connected with the anode of electrolytic capacitor EC1.
The rear class Switching Power Supply 200 of soft upper electric system is connected in parallel on the both ends of electrolytic capacitor EC1.
4 power diode D1-D4, boost inductance L1, the power the 5th of bidirectional thyristor S0, uncontrollable rectifier unit 110
Power diode D5 and electrolytic capacitor EC1 forms soft upper electrical circuit.Alternating voltage us of the bidirectional thyristor S0 according to AC poweri
Change and on or off, and when bidirectional thyristor S0 is in the conduction state, AC power fills electrolytic capacitor EC1
Electricity.In the voltage u of electrolytic capacitor EC1oWhen reaching maximum, soft power on is carried out to rear class Switching Power Supply 200.
Further, in the present embodiment, AC power is preferably the single phase alternating current power supply of 220V；5 power diodes
(DA-D5) preferably 600V/25A/100 DEG C of power diode；Boost inductance preferably uses 500 μ H；Electrolytic capacitor EC1 is preferably adopted
With the energy storage electrolytic capacitor of 400V/3300 μ F；Bidirectional thyristor S0 preferably powers on 600V/25A/100 DEG C of electric current in order to control
Bidirectional thyristor；IGBT S1 are preferably used for the electric current that boost inductance L1 is flowed through in control so that power factor is 1 600V/
25A/100 DEG C of IGBT.
In a preferred embodiment of the invention, soft upper electric system further includes the first filter capacitor C1, the second filtered electrical
Hold C2 and pull down resistor R1.First filter capacitor C1 is connected to the cathode of the first power diode D1 of uncontrollable rectifier unit 110
And the 4th power diode D4 anode between；Second filter capacitor C2 is connected to the both ends of electrolytic capacitor EC1；Pull down resistor R1
It is connected between the emitter of boost inductance and IGBT S1.Wherein, the first filter capacitor C1 and the second filter capacitor preferably use
The capacitance of 2.0 μ F/400V；Pull down resistor R1 uses 100k Ω/100 DEG C, the resistance of 10W.
In addition, in order to protrude the innovative part of the present invention, will not be proposed by the invention with solution in the present embodiment
The less close unit of technical problem relation introduces, but this is not intended that in the present embodiment that there is no other units.
Embodiment 2
A kind of soft upper electric system without current-limiting resistance based on thyristor is present embodiments provided, it is provided with embodiment 1
It is soft power on system approximation, the 6th power diode D6 is simply added in electric system on soft, as shown in Fig. 2, the 6th power
The D6 cathodes of the diode second end (i.e. the anode of the second power diode D2) and boost with uncontrollable rectifier unit 110 respectively
First end (i.e. one end of the boost inductance L1) connection of boosting unit 120；Anode respectively with boost boosting units 120 the 3rd
End (i.e. the anode of the 5th power diode) is connected with the cathode of electrolytic capacitor EC1.Bidirectional thyristor S0, uncontrollable rectifier unit
110 4 power diode D1-D4, the 6th power diode D6 and electrolytic capacitor EC1 forms soft upper electrical circuit.Compared to reality
The soft upper electrical circuit of the offer of example 1 is applied, the soft upper electrical circuit consumption smaller of the present embodiment, the charging of electrolytic capacitor EC1 is faster.
Embodiment 3
Present embodiment discloses it is a kind of using embodiment 1 disclosed in soft upper electric system carry out the soft method powered on, such as Fig. 3
It is shown, specifically include：
Step S31, connects the AC power of soft upper electric system, the IGBT of the boost boosting units of the soft upper electric system
Shut-off；
Step S32, charges the electrolytic capacitor of the soft upper electric system：
For the present embodiment to the charging process of electrolytic capacitor referring to Fig. 4, first curve in Fig. 4 is the voltage of AC power
Oscillogram；Article 2 column ripple is the conducting off state figure of bidirectional thyristor；Article 3 is that the voltage transformation of electrolytic capacitor is bent
Line chart.
The electric current that AC power provides makees cyclically-varying with the time.As shown in figure 4, the AC power that the present embodiment uses
The alternating voltage of offer is in sinusoidal variations：
In the alternating voltage u that AC power providesiWhen being increased to close to zero point, the bidirectional thyristor of the soft upper electric system
Conducting, the bidirectional thyristor, uncontrollable rectifier unit, boost inductance, the 5th power diode and the institute of the soft upper electric system
State electrolytic capacitor and form soft upper electrical circuit, AC power charges for electrolytic capacitor, the voltage u of electrolytic capacitoroRise；Boost inductance
It can play the role of suppressing current break；
And then, the alternating voltage u of AC poweriMay proceed to raise, after maximum is increased to, alternating voltage can under
Drop, when AC voltage drop is as low as zero, bidirectional thyristor turns off naturally, and AC power no longer charges electrolytic capacitor,
The voltage u of electrolytic capacitoroContinue to have；
Further, as the alternating voltage u of AC poweriSecondary when being increased to close to zero point, bidirectional thyristor can be carried
Preceding triggering, AC power charge for electrolytic capacitor, the voltage u of electrolytic capacitoroRaise again；
Then, as the alternating voltage u of AC poweriSecondary when being reduced to zero point, bidirectional thyristor turns off naturally, alternating current
Electrolytic capacitor is no longer charged in source, the voltage u of electrolytic capacitoroContinue to have；
Hereafter the alternating voltage u that each AC power providesiIt is increased to all trigger bidirectional thyristor close to before zero point, and
The time triggered every time all once shifts to an earlier date earlier above, the voltage u of electrolytic capacitor after each chargingoAll raise, be finally reached
Maximum.Soft to power on completion, circuit enters normal operating conditions.
Step S33, as the voltage u of electrolytic capacitoroWhen reaching maximum, the IGBT conductings of boost boosting units, to rear class
Switching Power Supply realize it is soft power on, circuit enters normal operating conditions.
Embodiment 4
Present embodiment discloses it is a kind of using embodiment 1 disclosed in soft upper electric system carry out the soft method powered on, its with
Soft powering method disclosed in embodiment 3 is similar, and simply when charging to electrolytic capacitor, its soft upper electrical circuit is poor
It is different.The soft upper electrical circuit used of the present embodiment for bidirectional thyristor, uncontrollable rectifier unit 4 power diodes (D1-D4),
6th power diode and electrolytic capacitor.
In conclusion a kind of soft upper electric system, equipment and its soft powering method of the present invention, have bridge is single-phase to have existing
Increase bidirectional thyristor on the basis of Power Factor Corrector as switch, adjusted using the voltage change of AC power two-way
The turn-on and turn-off time of thyristor, so as to control the charging of electrolytic capacitor so that the voltage of electrolytic capacitor can be desirably
Curve is gradually increasing, and effectively extends the service life of electrolytic capacitor；Also, controlled by the turn-on and turn-off of bidirectional thyristor
The gradation charging of electrolytic capacitor so that it is small to power on current overshoot, realizes soft power on.The circuit structure of the present invention is simple, member used
Part is few, and thyristor is cheap, and type selecting is convenient, applied widely.So the present invention effectively overcomes kind of the prior art
Plant shortcoming and have high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
- A kind of 1. soft upper electric system, it is characterised in that the rear class Switching Power Supply being used for realization after the soft upper electric system it is soft on Electricity, the soft upper electric system include：Bidirectional thyristor, uncontrollable rectifier unit, boost boosting units and electrolytic capacitor；One end of the bidirectional thyristor and one end of AC power connect, the first end of the other end and the uncontrollable rectifier unit Connection；The first end of the uncontrollable rectifier unit is connected with the other end of the bidirectional thyristor, second end and the boost liters Press unit first end connection, the 3rd end respectively with the second end of the boost boosting units and the anode of the electrolytic capacitor Connection, the 4th end is connected with the other end of the AC power；The first end of the boost boosting units is connected with the second end of the uncontrollable rectifier unit；Second end respectively with it is described 3rd end of uncontrollable rectifier unit is connected with the anode of the electrolytic capacitor；3rd end is connected with the cathode of the electrolytic capacitor；The rear class Switching Power Supply is connected to the both ends of the electrolytic capacitor；The change of the alternating voltage that the bidirectional thyristor is provided with the AC power and on or off, also, the friendship Charge in conducting to the electrolytic capacitor in galvanic electricity source；When the voltage of the electrolytic capacitor reaches maximum, realize to described The soft of rear class Switching Power Supply powers on.
- 2. soft upper electric system according to claim 1, it is characterised in that：The uncontrollable rectifier unit includes：First power Diode, the second power diode, the 3rd power diode and the 4th power diode；Wherein,First end of the cathode of first power diode as the uncontrollable rectifier unit, respectively with the bidirectional thyristor The other end be connected with the anode of the 3rd power diode, anode is connected with the anode of second power diode；Second end of the anode of second power diode as the uncontrollable rectifier unit, also boosts single with the boost The first end connection of member；Cathode is connected with the other end of the AC power and the anode of the 4th power diode respectively；Threeth end of the cathode of 3rd power diode as the uncontrollable rectifier unit, respectively with the 4th power two The cathode of pole pipe, the second end of the boost boosting units and the electrolytic capacitor anode connection, anode respectively with it is described The other end of bidirectional thyristor is connected with the cathode of first power diode；The cathode of 4th power diode cathode with the 3rd power diode, the boost boosting units respectively Second end be connected with the anode of the electrolytic capacitor；Fourth end of the anode as the uncontrollable rectifier unit, respectively with institute The other end for stating AC power is connected with the cathode of second power diode.
- 3. soft upper electric system according to claim 2, it is characterised in that：The soft upper electric system further includes the first filtered electrical Hold, first filter capacitor be connected to first power diode cathode and the 4th power diode anode it Between.
- 4. soft upper electric system according to claim 1, it is characterised in that：The boost boosting units include boost inductance, 5th power diode and IGBT；One end of the boost inductance is as the first end of the boost boosting units and the second end of the uncontrollable rectifier unit It is connected, the other end is connected with the cathode of the 5th power diode and the collector of the IGBT respectively；The cathode of 5th power diode is connected with the other end of the boost inductance, and anode boosts as the boost 3rd end of unit is connected with the cathode of the electrolytic capacitor；The collector of the IGBT is connected with the other end of the boost inductance and the cathode of the 5th power diode respectively； Second end of the emitter as the boost boosting units, respectively the 3rd end with the uncontrollable rectifier unit and the electrolysis The anode of capacitance is connected.
- 5. soft upper electric system according to claim 1, it is characterised in that：The soft upper electric system further includes pull down resistor, The pull down resistor is connected between the first end and second end of the boost boosting units.
- 6. soft upper electric system according to claim 1, it is characterised in that：The soft upper electric system further includes the second filtered electrical Hold；Second filter capacitor is connected to the both ends of the electrolytic capacitor.
- 7. soft upper electric system according to claim 1, it is characterised in that：The soft upper electric system further includes the 6th power two Pole pipe, the cathode of the 6th power diode are connected with the second end of the uncontrollable rectifier unit, anode and the electrolysis electricity The cathode connection of appearance.
- A kind of 8. soft powered devices, it is characterised in that：The soft powered devices are included as any one of claim 1-7 Soft upper electric system.
- A kind of 9. soft powering method, it is characterised in that realize that the soft of rear class Switching Power Supply after soft upper electric system powers on, it is described soft Powering method includes：Connect the AC power of the soft upper electric system, the IGBT shut-offs of the boost boosting units of the soft upper electric system；Charge to the electrolytic capacitor of the soft upper electric system：It is increased to approach in the alternating voltage that the AC power provides During zero point, the bidirectional thyristor conducting of the soft upper electric system, the bidirectional thyristor, the uncontrollable rectifier of the soft upper electric system Unit, the boost inductance of the electrolytic capacitor and the boost boosting units and the 5th power diode form circuit, institute State AC power to charge to the electrolytic capacitor, the voltage rise of the electrolytic capacitor；There is provided in the AC power When AC voltage drop is as low as zero, the bidirectional thyristor shut-off, the AC power to the electrolytic capacitor without charging, The voltage of the electrolytic capacitor continues to have；When the voltage of the electrolytic capacitor reaches maximum, the IGBT conductings, realize on soft the rear class Switching Power Supply Electricity.
- A kind of 10. soft powering method, it is characterised in that realize that the soft of rear class Switching Power Supply after soft upper electric system powers on, it is described Soft powering method includes：Connect the AC power of the soft upper electric system, the IGBT shut-offs of the boost boosting units of the soft upper electric system；Charge to the electrolytic capacitor of the soft upper electric system：It is increased to approach in the alternating voltage that the AC power provides During zero point, the bidirectional thyristor conducting of the soft upper electric system, the bidirectional thyristor, the uncontrollable rectifier of the soft upper electric system Unit, the 6th power diode and the electrolytic capacitor form circuit, and the electrolytic capacitor is in charged state, the electrolysis electricity The voltage rise of appearance；When the AC voltage drop that the AC power provides is as low as zero, the bidirectional thyristor shut-off is described Electrolytic capacitor is in non-charged state, and the voltage of the electrolytic capacitor continues to have；When the voltage of the electrolytic capacitor reaches maximum, the IGBT conductings, realize on soft the rear class Switching Power Supply Electricity.
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| CN108023471B (en) | 2020-08-07 |
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