CN105915086B - High-efficiency AC/D/C power circuit and its control method and method of supplying power to - Google Patents
High-efficiency AC/D/C power circuit and its control method and method of supplying power to Download PDFInfo
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- CN105915086B CN105915086B CN201610236162.4A CN201610236162A CN105915086B CN 105915086 B CN105915086 B CN 105915086B CN 201610236162 A CN201610236162 A CN 201610236162A CN 105915086 B CN105915086 B CN 105915086B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004146 energy storage Methods 0.000 claims abstract description 101
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 53
- 230000005611 electricity Effects 0.000 claims description 7
- 230000005669 field effect Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000011217 control strategy Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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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
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of AC power input into DC power output without possibility of reversal 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
- H02M7/217—Conversion of AC power input into DC power output without possibility of reversal 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
- H02M7/219—Conversion of AC power input into DC power output without possibility of reversal 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 in a bridge configuration
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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
- H02M1/14—Arrangements for reducing ripples from DC input or output
-
- 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
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4233—Arrangements for improving power factor of AC input using a bridge converter comprising active switches
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The present invention provides a kind of high-efficiency AC/D/C power circuit and its control method and method of supplying power to, when AC supply voltage amplitude is higher than intermediate energy storage circuit voltage and load voltage sum, AC power charges and provides energy to load the AC/DC power circuits to middle accumulator；While AC supply voltage amplitude is less than intermediate energy storage circuit voltage and load voltage sum, AC supply voltage amplitude higher than load voltage and intermediate energy storage circuit voltage difference when, AC power is common with intermediate energy storage circuit to provide energy, intermediate energy storage circuit discharging to load.Amplitude or the discharge time of intermediate energy storage circuit discharging electric current are controlled, output constant current is capable of achieving.Power device loss of the present invention is extremely low, and conversion efficiency is high, easily expands the power range of application of driving power supply；The angle of flow of rectifier bridge is increased, the power factor for making power circuit is higher than conventional rectifier circuit；Output voltage and current ripples are small, and have the ability for preferably resisting lightning surge.
Description
Technical field
The present invention relates to a kind of high-efficiency AC/D/C power circuit and its control method and method of supplying power to, it is related to AC/DC power supplys
Field, and more particularly, it is related to the LED drive power field of non-isolated.
Background technology
In increasing lighting device, LED replaces conventional illumination sources, because it has more
Small size, low-power consumption, quick light emission operation and long luminescence lifetime.LED cannot connect directly to alternating current, it is necessary to match somebody with somebody
Corresponding current limliting driving power supply is put, current LED drives the scheme for using based on traditional high frequency switch power, and circuit is complicated,
High cost so that numerous manufacturers' conversion linear power supply schemes.
Conventional linear power circuit is as shown in Figure 1：Alternating current (or does not have via after rectifier bridge rectification to storage capacitor C1
Storage capacitor C1) charge, storage capacitor C1 maintains the voltage at its two ends to be consistently greater than the voltage at load R_load two ends, current limliting work(
Rate device M1 is undertaken on storage capacitor C1 beyond storage capacitor C2 voltages to maintain the electric current for loading R_load constant.
The characteristics of linear current-limiting circuit is simple circuit, and current-limited power device M1 can be integrated in inside an application-specific integrated circuit；
The shortcoming of the circuit is：
First, it is that, when line voltage is higher, the power consumption of current-limited power device M1 is very big, the temperature rise of current-limited power device M1
It is higher, which has limited the application power bracket of Linear Driving power supply.
If the 2, without storage capacitor C1 or C1 capacity very little：When input voltage instantaneous value is less than storage capacitor C2 two
During terminal voltage, storage capacitor C1 can not maintain its both end voltage to be consistently greater than the voltage at load two ends, cause load R_load to exist
The storage capacitor C2 electric discharge later stages do not have electric current to flow through, and ripple is than larger, and the utilization rate of load is low；When input voltage virtual value compares
When low, current-limited power device M1 is unable to reach the purpose of constant current so that line regulation is low.
3rd, if larger storage capacitor C1 is present, because the angle of flow of rectifier bridge is smaller, the linear power source circuit
Power factor is relatively low.
Above mentioned problem is the problem that should be paid attention to and solve in the design and production process of AC/DC power circuits.
The content of the invention
It is an object of the invention to provide a kind of high-efficiency AC/D/C power circuit and its control method and method of supplying power to, from root
Above-mentioned 3 kinds of harm is avoided on this, the efficiency of driving power supply is especially significantly improved, the application power of driving power supply is expanded
Scope, and meet the requirement to power factor (PF), solve the above-mentioned problems in the prior art.
Technical solution of the invention is：
A kind of high-efficiency AC/D/C power circuit, including：
One AC power, there is provided alternating current；
One rectification circuit, direct current is converted to by AC power offer alternating current；
One current limliting-constant-current circuit, including switching device and intermediate energy storage circuit, for being higher than in AC supply voltage amplitude
When intermediate energy storage circuit voltage is with load voltage sum, AC power charges to middle accumulator and provides energy to load,
Intermediate energy storage circuit storage energy simultaneously realizes metering function；And for electric less than intermediate energy storage circuit in AC supply voltage amplitude
While pressure is with load voltage sum, AC supply voltage amplitude higher than load voltage and intermediate energy storage circuit voltage difference when,
AC power is common with intermediate energy storage circuit to provide energy, intermediate energy storage circuit discharging to load；Control intermediate energy storage circuit is put
The amplitude of electric current or discharge time, realize output constant current.
One load circuit, is connected between rectification circuit and current limliting-constant-current circuit, by AC power and current limliting-Constant Electric Current
The electric energy that road provides is converted to output energy.
Further, current limliting-constant-current circuit includes intermediate energy storage circuit, switching device M1, switching device M2, diode
D5, diode D6, the input of rectification circuit are connected with AC power respectively, the cathode output end connection diode of rectification circuit
The positive pole of D5, the negative pole of diode D5 connects the positive pole of diode D6 by intermediate energy storage circuit, and the negative pole of diode D6 passes through
The cathode output end of load connection rectification circuit；
One end of switching device M1 is connected to the negative pole of diode D5 and the intersection of intermediate energy storage circuit, switching device M1
The other end be connected to the intersection of the negative pole of diode D6 and load, the control termination control signal of switching device M1；Switch
One end of device M2 is connected to the intersection of the positive pole of diode D5 and the cathode output end of rectification circuit, and switching device M2's is another
One end is connected between the intersection of accumulator and the positive pole of diode D6, the control termination control signal of switching device M2.
Further, current limliting-constant-current circuit includes intermediate energy storage circuit, switching device M1, switching device M2, diode
D5, diode D6, the input of rectification circuit are connected with AC power respectively, and the cathode output end of rectification circuit is by the company of load
The positive pole of diode D6 is connect, the negative pole of diode D6 connects the positive pole of diode D5 by intermediate energy storage circuit, diode D5's
Negative pole connects the cathode output end of rectification circuit；
One end of switching device M1 is connected to the positive pole of diode D6 and the intersection of load, the other end of switching device M1
It is connected between the intersection of accumulator and the positive pole of diode D5, the control termination control signal of switching device M1；Switch
One end of device M2 is connected to the negative pole of diode D6 and the intersection of intermediate energy storage circuit, the other end connection of switching device M2
In the intersection of the cathode output end of the negative pole and rectification circuit of diode D5, the control termination control signal of switching device M2.
Further, also including output filter capacitor C2, output filter capacitor C2 is in parallel with load.
Further, intermediate energy storage circuit uses storage capacitor net using intermediate energy storage electric capacity C1 or intermediate energy storage circuit
Network, storage capacitor network is characterised by：Two or more capacitances in series are equivalent to during charging, during discharging etc.
Imitate as two or more electric capacity are in parallel.
Further, storage capacitor network includes electric capacity C3, electric capacity C4, electric capacity C5, and one end of electric capacity C3 is connected to two poles
The intersection of the negative pole of pipe D7 and the positive pole of diode D8, the negative pole and diode of the other end connection diode D9 of electric capacity C3
The intersection of the negative pole of D12, electric capacity C4 one end is connected to the intersection of the negative pole of diode D8 and the positive pole of diode D9, electric capacity
The other end of C4 is connected to the intersection of the negative pole of diode D10 and the positive pole of diode D11, and one end of electric capacity C5 is connected to two
The intersection of the negative pole of pole pipe D11 and the positive pole of diode D12, the other end of electric capacity C5 be connected to the positive pole of diode D10 with
The intersection of the positive pole of diode D7.
Further, switching device M1 uses the drain electrode of FET M1, FET M1 to be connected to the negative of diode D5
Pole and the intersection of intermediate energy storage circuit, the source electrode of FET M1 are connected to the negative pole of diode D6 and the intersection of load,
The external control signal of grid of FET M1.
Further, switching device M2 uses FET M2, and the drain electrode of FET M2 is being connected to diode D5 just
The intersection of the cathode output end of pole and rectification circuit, the source electrode of FET M2 is connected between accumulator and diode D6
Positive pole intersection, the external control signal of grid of FET M2.
Further, switching device M1 uses FET M1, and the drain electrode of FET M1 is being connected to diode D6 just
Pole is connected to the positive pole of diode D5 and the intersection of intermediate energy storage circuit with the intersection for loading, the source electrode of FET M1,
The external control signal of grid of FET M1.
Further, switching device M2 uses the drain electrode of FET M2, FET M2 to be connected to the negative of diode D6
Pole and the intersection of intermediate energy storage circuit, the source electrode of FET M2 are connected to rectification circuit cathode output end and diode D5's
The intersection of negative pole pole, the external control signal of grid of FET M2.
A kind of control method of high-efficiency AC described in any of the above-described/D/C power circuit, switching device M1 and switching device
M2 is individually controlled and is operated in linear condition or on off state.
Further, controlling switch device M2 is operated on off state, and only in AC supply voltage amplitude less than load
During voltage, switching device M2 conductings, remaining time shut-off switching device M2；
Controlling switch device M1 is operated on off state, and load voltage and intermediate energy storage are less than in AC supply voltage amplitude
Sometime open switching device M1 during the difference of circuit voltage, according to demand the turn-off time of controlling switch device M1 and then
Control is delivered to the energy of output end；Switching device M1 is forced shutdown when AC supply voltage amplitude is higher than load voltage.
A kind of method of supplying power to of high-efficiency AC described in any of the above-described/D/C power circuit, AC power passes through intermediate energy storage
Circuit provides energy to load：
Power supply mode one：AC power is via rectification circuit, diode D5, intermediate energy storage circuit and diode D6 to load
Energy is provided, intermediate energy storage circuit charges；
Power supply mode two：AC power via rectification circuit, switching device M2, intermediate energy storage circuit and switching device M1 to
Load provides energy, intermediate energy storage circuit discharging.
Further, AC power also timesharing or can simultaneously be powered mode three：AC power is via rectification circuit, two
Pole pipe D5, switching device M1 or AC power provide energy via rectification circuit, switching device M2, diode D6 to load.
Further, when AC supply voltage amplitude is higher than intermediate energy storage circuit voltage and load voltage sum, into confession
Electrically one；
The amplitude of AC supply voltage is less than intermediate energy storage circuit voltage and load voltage sum and higher than intermediate energy storage electricity
During the difference of road voltage and load voltage, into power supply mode two；
AC supply voltage amplitude can enter power supply mode three higher than during load voltage.
Further, the other times section outside power supply mode one, power supply mode two, power supply mode three, rectification circuit, two poles
Pipe D5, diode D6, switching device M1, switching device M2 do not work, and only output filter capacitor C2 discharges and provided to load
Energy；If without output filter capacitor C2, load current is interrupted.
The beneficial effects of the invention are as follows：This kind of high-efficiency AC/D/C power circuit and its control method and method of supplying power to, power
Device loss is extremely low, and conversion efficiency is high, easily expands the power range of application of driving power supply.Invention increases rectifier bridge
The angle of flow, so that the power factor of power circuit is higher than conventional rectifier circuit.And output voltage of the invention and current ripples
It is small, and have the ability for preferably resisting lightning surge.
Brief description of the drawings
Fig. 1 is the connection diagram of conventional linear power circuit in the prior art.
Fig. 2 is the connection diagram of embodiment of the present invention high-efficiency AC/D/C power circuit.
Fig. 3 is the charging process schematic diagram of the intermediate energy storage electric capacity C1 in embodiment high-efficiency AC/D/C power circuit, wherein
（a）It is the positive half cycle of AC power,（b）It is the negative half period of AC power.
Fig. 4 is the discharge process schematic diagram of the intermediate energy storage electric capacity C1 in embodiment high-efficiency AC/D/C power circuit, wherein
（a）It is the positive half cycle of AC power,（b）It is the negative half period of AC power.
Fig. 5 is another connection diagram of embodiment high-efficiency AC/D/C power circuit.
Fig. 6 is a kind of connection diagram of the circuit of storage capacitor network in embodiment.
Specific embodiment
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
Embodiment
A kind of high-efficiency AC/D/C power circuit, including：
One AC power, there is provided alternating current；
One rectification circuit, direct current is converted to by AC power offer alternating current；
One current limliting-constant-current circuit, can be including but not limited to switching device and intermediate energy storage circuit, in AC power electricity
When pressure amplitude value is higher than intermediate energy storage circuit voltage and load voltage sum, AC power charges and to load to middle accumulator
Energy is provided, intermediate energy storage circuit storage energy simultaneously realizes metering function；And for being less than centre in AC supply voltage amplitude
While accumulator voltage is with load voltage sum, AC supply voltage amplitude is higher than load voltage and intermediate energy storage circuit electricity
During the difference of pressure, AC power is common with intermediate energy storage circuit to provide energy, intermediate energy storage circuit discharging to load.Storage in the middle of control
The amplitude of energy circuit discharging electric current or discharge time, it is capable of achieving output constant current.
One load circuit, is connected between rectification circuit and current limliting-constant-current circuit, by AC power and current limliting-Constant Electric Current
The electric energy that road provides is converted to output energy.
Such as Fig. 2, current limliting-constant-current circuit includes intermediate energy storage circuit, switching device M1, switching device M2, diode D5, two
Pole pipe D6, the input of rectification circuit is connected with AC power respectively, the cathode output end connection diode D5's of rectification circuit
Positive pole, the negative pole of diode D5 connects the positive pole of diode D6 by intermediate energy storage circuit, and the negative pole of diode D6 is by load
Connect the cathode output end of rectification circuit.
One end of switching device M1 is connected to the negative pole of diode D5 and the intersection of intermediate energy storage circuit, switching device M1
The other end be connected to the intersection of the negative pole of diode D6 and load, the control termination control signal of switching device M1；Switch
One end of device M2 is connected to the intersection of the positive pole of diode D5 and the cathode output end of rectification circuit, and switching device M2's is another
One end is connected between the intersection of accumulator and the positive pole of diode D6, the control termination control signal of switching device M2.
Such as Fig. 5, current limliting-constant-current circuit includes intermediate energy storage circuit, switching device M1, switching device M2, diode D5, two
Pole pipe D6, the input of rectification circuit is connected with AC power respectively, and the cathode output end of rectification circuit is by loading connection two
The positive pole of pole pipe D6, the negative pole of diode D6 connects the positive pole of diode D5, the negative pole of diode D5 by intermediate energy storage circuit
Connect the cathode output end of rectification circuit.
One end of switching device M1 is connected to the positive pole of diode D6 and the intersection of load, the other end of switching device M1
It is connected between the intersection of accumulator and the positive pole of diode D5, the control termination control signal of switching device M1；Switch
One end of device M2 is connected to the negative pole of diode D6 and the intersection of intermediate energy storage circuit, the other end connection of switching device M2
In the intersection of the cathode output end of the negative pole and rectification circuit of diode D5, the control termination control signal of switching device M2.
This kind of high-efficiency AC/D/C power circuit, power device loss is extremely low, and conversion efficiency is high, easily expands and drives electricity
The power range of application in source.Invention increases the angle of flow of rectifier bridge, so that the power factor of power circuit is higher than tradition
Rectification circuit.And output voltage of the invention and current ripples are small, and there is the ability for preferably resisting lightning surge.
Load R_load can be resistive load, or other types of load, including but not limited to LED load,
Switching Power Supply is loaded or linear power supply load.Output filter capacitor C2 is may also include, output filter capacitor C2 is in parallel with load.It is defeated
The capacitance for going out filter capacitor C2 can be chosen according to performance requirement.Output filter capacitor C2 is an optional device, by output current
Ripple requirement is determined.There is no output filter capacitor C2, circuit also can normal work.
Diode D5, diode D6 provide charge circuit for intermediate energy storage electric capacity C1.Switching device M1, switching device M2 are
Power device, its function is：Discharge path is provided to intermediate energy storage electric capacity C1 and be delivered to according to load R_load demand modelings
Output energy number.Under different control strategies, switching device M1, switching device M2 can be operated in respectively on off state or
Linear condition.Diode D1, diode D2, diode D3, diode D4 are input rectifying bridge.Intermediate energy storage electric capacity C1, output
The capacity of filter capacitor C2 can be chosen according to actual performance requirement.
Intermediate energy storage circuit uses storage capacitor network, storage capacitor using intermediate energy storage electric capacity C1 or intermediate energy storage circuit
Network is characterised by：Two or more capacitances in series are equivalent to during charging, be equivalent to during discharging two or
Multiple electric capacity are in parallel.Fig. 6 is a kind of storage capacitor network implementations, and storage capacitor network includes electric capacity C3, electric capacity C4, electric capacity
One end of C5, electric capacity C3 are connected to the intersection of the negative pole of diode D7 and the positive pole of diode D8, and the other end of electric capacity C3 connects
The intersection of the negative pole of diode D9 and the negative pole of diode D12 is met, electric capacity C4 one end is connected to the negative pole and two of diode D8
The intersection of the positive pole of pole pipe D9, the other end of electric capacity C4 is connected to the friendship of the negative pole of diode D10 and the positive pole of diode D11
At remittance, one end of electric capacity C5 is connected to the intersection of the negative pole of diode D11 and the positive pole of diode D12, and electric capacity C5's is another
End is connected to the intersection of the positive pole of diode D10 and the positive pole of diode D7.
As shown in Fig. 2 switching device M1 can use FET M1, the drain electrode of FET M1 is connected to diode D5's
The intersection of negative pole and intermediate energy storage circuit, the source electrode of FET M1 is connected to the negative pole of diode D6 and crossing for load
Place, the external control signal of grid of FET M1.
As shown in Fig. 2 switching device M2 can use FET M2, the drain electrode of FET M2 is connected to diode D5's
The intersection of the cathode output end of positive pole and rectification circuit, the source electrode of FET M2 is connected between accumulator and diode
The intersection of the positive pole of D6, the external control signal of grid of FET M2.
As shown in figure 5, switching device M1 can use FET M1, the drain electrode of FET M1 is connected to diode D6's
Positive pole is connected to the positive pole of diode D5 and crossing for intermediate energy storage circuit with the intersection for loading, the source electrode of FET M1
Place, the external control signal of grid of FET M1.
As shown in figure 5, switching device M2 can use FET M2, the drain electrode of FET M2 is connected to diode D6's
The intersection of negative pole and intermediate energy storage circuit, the source electrode of FET M2 is connected to rectification circuit cathode output end and diode D5
Negative pole pole intersection, the external control signal of grid of FET M2.
A kind of control method of high-efficiency AC/D/C power circuit, including：
a）Controlling switch device M2 is operated on off state, and only in AC supply voltage amplitude less than output filter capacitor
C2 voltages, i.e. | Vac |<Turned on during V_C2, the shut-off of remaining time.Can opened loop control.
B) controlling switch device M1 is operated on off state, and output filter capacitor C2 is less than in AC supply voltage amplitude
With the voltage difference of intermediate energy storage electric capacity C1, i.e. | Vac |<It is sometime open-minded during V_C2-V_C1.Turn-off time is controllable, from
And control to be delivered to according to demand output energy number.In input supply voltage instantaneous value more than output filter capacitor C2 electricity
Pressure, i.e. | Vac |>It is forced shutdown during V_C2.
This kind of control method of high-efficiency AC/D/C power circuit, switching device M1 and switching device M2 are operated in switch
State, the pressure difference being applied between switching device two ends is very low, significantly reduces loss.
This kind of control method of high-efficiency AC/D/C power circuit, AC power is always via intermediate energy storage electric capacity C1 to defeated
Go out filter capacitor C2 and load R_load provides energy, not via path diode D5- switching devices M1 or switching device M2-
Diode D6 provides energy to output filter capacitor C2 and load R_load.
This kind of control method of high-efficiency AC/D/C power circuit, intermediate energy storage electric capacity C1 is discharged by input power, effectively
The angle of flow of rectifier bridge is increased, so as to improve power factor (PF).During intermediate energy storage electric capacity C1 discharges, supply voltage rises,
Intermediate energy storage electric capacity C1 voltages decline, and Vrec+V_C1 amplitudes are changed very little, and effectively limit discharge current, reduce output electricity
Pressure and current ripples.
Except above-mentioned control schemes, this power circuit is also applicable various control strategy.Switching device M1, switching device M2
On off state or linear condition can be respectively operated in as needed.Input power can be filtered via intermediate energy storage electric capacity C1 to output
Ripple electric capacity C2 and load R_load provide energy, also can be via path diode D5- switching devices M1 or switching device M2- bis-
Pole pipe D6 provides energy to output filter capacitor C2 and load R-road.Both modes for providing energy can be carried out with timesharing,
Also can carry out simultaneously.
A kind of method of supplying power to of high-efficiency AC/DC, AC power has following three kinds of power supply modes：
Power supply mode one：AC power is via rectifier bridge, diode D5, intermediate energy storage electric capacity C1 and diode D6 to output
Filter capacitor C2 and load R_load provide energy, and intermediate energy storage electric capacity C1 charges.
Power supply mode two：AC power via rectifier bridge, switching device M2, intermediate energy storage electric capacity C1 and switching device M1 to
Output filter capacitor C2 and load R_load provide energy, intermediate energy storage electric capacity C1 electric discharges；
Power supply mode three：AC power is via rectifier bridge, diode D5, switching device M1 or AC power via rectification
Bridge, switching device M2, diode D6, energy is provided to output filter capacitor C2 and load R_load.Power supply mode three can be with confession
Electrically one or power supply mode two simultaneously or timesharing carry out.Under power supply mode three, switching device M1 or switching device M2 is controlled
System is operated in linear condition.Power supply mode three not necessarily, can decide whether using power supply according to different control strategies
Mode three.
When the voltage of voltage V_C1 and output filter capacitor C2 of the input supply voltage amplitude higher than intermediate energy storage electric capacity C1
During V_C2 sums, input power passes through rectifier bridge（Diode D1 and diode D4 or diode D2 and diode D3）, diode
D5 and diode D6 charges to middle storage capacitor C1 and output filter capacitor C2, and such as Fig. 3 (a), Fig. 3 (b) are shown in solid.It is middle
Storage capacitor C1 plays metering function.
When input supply voltage amplitude is less than intermediate energy storage electric capacity C1 and output filter capacitor C2 voltages and and more than output
When filter capacitor C2 and intermediate energy storage electric capacity C1 voltage differences, suitable control switching device M1 and switching device M2 so that centre storage
Energy electric capacity C1 is discharged output by input power, rectifier bridge, switching device M2 and switching device M1, is stored in intermediate energy storage
Energy in electric capacity C1 is discharged into output end.As shown in Fig. 4 (a), Fig. 4 (b).Intermediate energy storage electric capacity C1 and input power it is common to
Output provides energy.Switching device M1 and switching device M2 can respectively be operated in linear condition or on off state as needed.
During input supply voltage amplitude is higher than output filter capacitor C2 voltages, i.e. | Vac |>During V_ C2, can also fit
As controlling switch device M1 or switching device M2 so that input power by rectifier bridge-diode D5- switching devices M1 or
Rectifier bridge-switching device M2- diodes D6 charges to output filter capacitor C2.Its principle is identical with conventional linear power circuit.
Simultaneously can be with the charge or discharge of intermediate energy storage electric capacity C1.
Except the other times section of above-mentioned three kinds of mode of operations, rectifier bridge, diode D5, diode D6, switching device M1, open
Close device M2 not work, only output filter capacitor C2 to discharge and provide energy to load R_load.If without output filter capacitor
C2, then load current is interrupted.
Claims (14)
1. a kind of high-efficiency AC/D/C power circuit, it is characterised in that including：
One AC power, there is provided alternating current；
One rectification circuit, direct current is converted to by AC power offer alternating current；
One current limliting-constant-current circuit, including switching device and intermediate energy storage circuit, for being higher than centre in AC supply voltage amplitude
When accumulator voltage is with load circuit voltage sum, AC power charges to middle accumulator and provides energy to load circuit
Amount, intermediate energy storage circuit storage energy simultaneously realizes metering function；And for electric less than intermediate energy storage in AC supply voltage amplitude
While road voltage is with load circuit voltage sum, AC supply voltage amplitude is higher than load circuit and intermediate energy storage circuit voltage
Difference when, AC power and intermediate energy storage circuit are common to provide energy, intermediate energy storage circuit discharging to load circuit；Controlling switch
Device, so as to control amplitude or the discharge time of intermediate energy storage circuit discharging electric current, realizes output constant current；
One load circuit, is connected between rectification circuit and current limliting-constant-current circuit, and AC power is carried with current limliting-constant-current circuit
The electric energy of confession is converted to output energy；
Current limliting-constant-current circuit includes intermediate energy storage circuit, switching device M1, switching device M2, diode D5, diode D6, whole
The input of current circuit is connected with AC power respectively, the positive pole of the cathode output end connection diode D5 of rectification circuit, two poles
The negative pole of pipe D5 connects the positive pole of diode D6 by intermediate energy storage circuit, and the negative pole of diode D6 connects whole by load circuit
The cathode output end of current circuit；One end of switching device M1 is connected to the negative pole of diode D5 and crossing for intermediate energy storage circuit
Place, the other end of switching device M1 is connected to the negative pole of diode D6 and the intersection of load circuit, the control of switching device M1
Termination control signal；One end of switching device M2 is connected to crossing for the positive pole of diode D5 and the cathode output end of rectification circuit
Place, the other end of switching device M2 is connected between the intersection of accumulator and the positive pole of diode D6, switching device M2's
Control termination control signal；
Or, current limliting-constant-current circuit includes intermediate energy storage circuit, switching device M1, switching device M2, diode D5, diode
D6, the input of rectification circuit is connected with AC power respectively, and the cathode output end of rectification circuit connects two by load circuit
The positive pole of pole pipe D6, the negative pole of diode D6 connects the positive pole of diode D5, the negative pole of diode D5 by intermediate energy storage circuit
Connect the cathode output end of rectification circuit；One end of switching device M1 is connected to the positive pole of diode D6 and crossing for load circuit
Place, the other end of switching device M1 is connected between the intersection of accumulator and the positive pole of diode D5, switching device M1's
Control termination control signal；One end of switching device M2 is connected to the negative pole of diode D6 and the intersection of intermediate energy storage circuit,
The other end of switching device M2 is connected to the intersection of the negative pole of diode D5 and the cathode output end of rectification circuit, switching device
The control termination control signal of M2.
2. high-efficiency AC as claimed in claim 1/D/C power circuit, it is characterised in that：Load circuit also includes that output is filtered
Electric capacity C2, output filter capacitor C2 is in parallel with load circuit.
3. high-efficiency AC as claimed in claim 1/D/C power circuit, it is characterised in that：Intermediate energy storage circuit is stored up using middle
Energy electric capacity C1 or intermediate energy storage circuit use storage capacitor network, storage capacitor network that two or two are equivalent to during charging
Above capacitances in series, is equivalent to two or more electric capacity in parallel during discharging.
4. high-efficiency AC as claimed in claim 3/D/C power circuit, it is characterised in that：Storage capacitor network include electric capacity C3,
Electric capacity C4, electric capacity C5, one end of electric capacity C3 are connected to the intersection of the negative pole of diode D7 and the positive pole of diode D8, electric capacity C3
Other end connection diode D9 negative pole and the negative pole of diode D12 intersection, electric capacity C4 one end is connected to diode D8
Negative pole and diode D9 positive pole intersection, the other end of electric capacity C4 is connected to the negative pole and diode D11 of diode D10
Positive pole intersection, one end of electric capacity C5 is connected to the intersection of the negative pole of diode D11 and the positive pole of diode D12, electricity
The other end for holding C5 is connected to the intersection of the positive pole of diode D10 and the positive pole of diode D7.
5. high-efficiency AC as claimed in claim 1/D/C power circuit, it is characterised in that：Switching device M1 uses FET
The drain electrode of M1, FET M1 is connected to the negative pole of diode D5 and the intersection of intermediate energy storage circuit, the source of FET M1
Pole is connected to the negative pole of diode D6 and the intersection of load circuit, the external control signal of grid of FET M1.
6. high-efficiency AC as claimed in claim 1/D/C power circuit, it is characterised in that：Switching device M2 uses FET
The drain electrode of M2, FET M2 is connected to the intersection of the positive pole of diode D5 and the cathode output end of rectification circuit, field-effect
The source electrode of pipe M2 is connected between the intersection of accumulator and the positive pole of diode D6, the external control of grid of FET M2
Signal.
7. high-efficiency AC as claimed in claim 1/D/C power circuit, it is characterised in that：Switching device M1 uses FET
The drain electrode of M1, FET M1 is connected to the positive pole of diode D6 and the intersection of load circuit, and the source electrode of FET M1 connects
It is connected on the positive pole of diode D5 and the intersection of intermediate energy storage circuit, the external control signal of grid of FET M1.
8. high-efficiency AC as claimed in claim 1/D/C power circuit, it is characterised in that：Switching device M2 uses FET
The drain electrode of M2, FET M2 is connected to the negative pole of diode D6 and the intersection of intermediate energy storage circuit, the source of FET M2
Pole is connected to the intersection of rectification circuit cathode output end and the negative pole pole of diode D5, the external control of grid of FET M2
Signal.
9. a kind of control method of high-efficiency AC/D/C power circuit described in any one of claim 1-8, it is characterised in that switch
Device M1 and switching device M2 are individually controlled and are operated in linear condition or on off state.
10. the control method of high-efficiency AC as claimed in claim 9/D/C power circuit, it is characterised in that
Controlling switch device M2 is operated on off state, and is only opened when AC supply voltage amplitude is less than load circuit voltage
Close device M2 conductings, remaining time shut-off switching device M2；
Controlling switch device M1 is operated on off state, and load circuit voltage and intermediate energy storage are less than in AC supply voltage amplitude
Sometime open switching device M1 during the difference of circuit voltage, according to demand the turn-off time of controlling switch device M1 and then
Control is delivered to the energy of load circuit；Switching device is forced shutdown when AC supply voltage amplitude is more than load circuit voltage
M1。
The method of supplying power to of high-efficiency AC/D/C power circuit described in a kind of 11. any one of claim 1-8, it is characterised in that exchange
Power supply provides energy by intermediate energy storage circuit to load circuit：
Power supply mode one：AC power is via rectification circuit, diode D5, intermediate energy storage circuit and diode D6 to load circuit
Energy is provided, intermediate energy storage circuit charges；
Power supply mode two：AC power is via rectification circuit, switching device M2, intermediate energy storage circuit and switching device M1 to load
Circuit provides energy, intermediate energy storage circuit discharging.
The method of supplying power to of 12. high-efficiency ACs as claimed in claim 11/D/C power circuit, it is characterised in that：AC power is also
Timesharing or can simultaneously be powered mode three：AC power is via rectification circuit, diode D5, switching device M1 or alternating current
Source provides energy via rectification circuit, switching device M2, diode D6 to load circuit.
The method of supplying power to of 13. high-efficiency ACs as claimed in claim 12/D/C power circuit, it is characterised in that：
When AC supply voltage amplitude is higher than intermediate energy storage circuit voltage and load circuit voltage sum, into power supply mode one；
AC supply voltage amplitude is less than intermediate energy storage circuit voltage and load circuit voltage sum and higher than load circuit voltage
And during the difference of intermediate energy storage circuit voltage, into power supply mode two；
During AC supply voltage amplitude is higher than load circuit voltage, into power supply mode three.
The method of supplying power to of 14. high-efficiency ACs as claimed in claim 13/D/C power circuit, it is characterised in that：Power supply mode one,
Other times section outside power supply mode two, power supply mode three, rectification circuit, diode D5, diode D6, switching device M1, opens
Close device M2 not work, only output filter capacitor C2 to discharge and provide energy to load circuit；If without output filter capacitor C2,
Then load circuit current is interrupted.
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| CN109088535A (en) * | 2017-06-14 | 2018-12-25 | 上海明石光电科技有限公司 | A kind of Switching Power Supply and its soft starting circuit |
| CN108666979B (en) * | 2018-04-24 | 2019-09-13 | 湖北三江航天万峰科技发展有限公司 | A kind of high-voltage switch power supply real-time protection circuit |
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| CN201789415U (en) * | 2009-11-17 | 2011-04-06 | 中兴通讯股份有限公司 | Power supply device for pulse-type load |
| CN103260316A (en) * | 2013-05-27 | 2013-08-21 | 上海路千电子科技有限公司 | Two-circuit current-limiting driving circuit and two-circuit current-limiting driving method |
| CN103269537A (en) * | 2013-05-28 | 2013-08-28 | 上海路千电子科技有限公司 | A multi-loop current-limiting power supply circuit and its control method and current-limiting power supply method |
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| CN103197122B (en) * | 2013-04-12 | 2015-04-08 | 矽力杰半导体技术(杭州)有限公司 | Current detection circuit and switch-type regulator provided with same |
| CN103974510A (en) * | 2014-04-21 | 2014-08-06 | 李明科 | LED light-emitting circuit for night lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201789415U (en) * | 2009-11-17 | 2011-04-06 | 中兴通讯股份有限公司 | Power supply device for pulse-type load |
| CN103260316A (en) * | 2013-05-27 | 2013-08-21 | 上海路千电子科技有限公司 | Two-circuit current-limiting driving circuit and two-circuit current-limiting driving method |
| CN103269537A (en) * | 2013-05-28 | 2013-08-28 | 上海路千电子科技有限公司 | A multi-loop current-limiting power supply circuit and its control method and current-limiting power supply method |
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Effective date of registration: 20200417 Address after: 201100 room ta228, building 1, No. 450, Husong Road, Minhang District, Shanghai Patentee after: Shanghai Zhihong Electric Technology Co., Ltd Address before: 241009 No. 5, steam Road, Wuhu economic and Technological Development Zone, Anhui, 2-05 Patentee before: WUHU RUIXIN ELECTRONIC TECHNOLOGY Co.,Ltd. |