CN109149967A - A kind of capacitance-voltage-distributing type offset-type power supply - Google Patents
A kind of capacitance-voltage-distributing type offset-type power supply Download PDFInfo
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- CN109149967A CN109149967A CN201810274563.8A CN201810274563A CN109149967A CN 109149967 A CN109149967 A CN 109149967A CN 201810274563 A CN201810274563 A CN 201810274563A CN 109149967 A CN109149967 A CN 109149967A
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- Prior art keywords
- voltage
- capacitance
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- offset
- power supply
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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
-
- 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
-
- 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
Abstract
The invention discloses a kind of capacitance-voltage-distributing type offset-type power supplys, belong to high frequency list converting power source series, output and alternating current input same frequency, the altogether neutral conductor [NEUTRAL] N；Have the function of to export pressure stabilizing, small range pressure regulation, input power factor correction；Successfully solve the problem that ' excess energy ' of the offset-type power supply when mains input voltage is higher than load voltage rated value returns to alternating current；Required offset voltage amplitude is usually less than 100V, therefore uses low-voltage, high-current internal resistance for Ω grades of m of metal-oxide-semiconductor, energy conservation, low cost, and metal-oxide-semiconductor can be directly in parallel for expanding output power；Using Bootstrap mode, rectification is served only for supplementing ' the insufficient energy ' when mains input voltage is lower than load voltage rated value, rectification flow very little；' essential distinction of a kind of offset-type power supply ' [201510051636.3] is: replacing auto-transformer using capacitance partial pressure circuit, this more makes energy consumption, cost, volume, weight, all substantially reduces with documents.
Description
Technical field
The present invention relates to power technique fields, specifically, being a kind of capacitance-voltage-distributing type offset-type power supply, are widely used in steady
Pressure and small magnitude pressure regulation occasion.
Background technique
Documents ' a kind of offset-type power supply ', Patent No.: 201510051636.3, the self coupling transformation of input terminal
Device, limits the energy-saving and environmental protection of power supply itself, inexpensive index further increases, for this purpose, by the self coupling transformation of documents
Device is left out, and uses capacitance partial pressure circuit instead, and spy proposes ' a kind of capacitance-voltage-distributing type offset-type power supply '.
Summary of the invention
The invention discloses a kind of capacitance-voltage-distributing type offset-type power supply, voltage on the filter capacitor Co ' of output circuit 4,
It is exactly offset voltage Δ, load voltage is equal to the algebraical sum of mains input voltage and offset voltage Δ, when mains input voltage is low
When load voltage rated value, offset voltage Δ is positive sine wave, when mains input voltage is higher than load voltage rated value,
Offset voltage Δ is reversed sine wave, adjusts offset voltage Δ value, so that it may control a kind of capacitance-voltage-distributing type offset-type power supply
Load voltage, to complete to the small range pressure regulation of load voltage, voltage stabilizing function；By documents, ' a kind of offset-type power supply '
[201510051636.3] auto-transformer of input terminal, uses capacitance partial pressure circuit 2 instead, and making property/valence ratio greatly improves.
The present invention adopts the following technical scheme that solution above-mentioned technical problem:
A kind of alternating current input of capacitance-voltage-distributing type offset-type power supply with export the neutral conductor [NEUTRAL] N altogether, output voltage with
Mains input voltage same frequency.Using compensation, algebraical sum of the load voltage equal to mains input voltage and offset voltage, adjustment
Offset voltage, so that it may complete to the small size pressure regulation of load voltage, voltage stabilizing function.Output circuit 4 is that load current [is always opened
Close], load current phase is controlled, so that it is approached mains input voltage phase, input power factor correction can be completed.It will comparison
A kind of file ' the auto-transformer of offset-type power supply ' input terminal uses capacitance partial pressure circuit instead, and making property/valence ratio greatly improves.
It is illustrated below in conjunction with attached drawing.
Detailed description of the invention
Fig. 1 is a kind of capacitance-voltage-distributing type offset-type power supply block diagram of the present invention,
Fig. 2 is that a kind of capacitance-voltage-distributing type offset-type power supply with active power factor correction circuit implements block diagram.
In attached drawing, parts list represented by the reference numerals are as follows:
1 is EMC circuit, and 2 be capacitance partial pressure circuit, and 3 be energy storage rectifier circuit, and 4 be output circuit, and 5 be control circuit.H,
N is respectively the firewire of alternating current input, the neutral conductor, and H ' is a kind of output line of fire of capacitance-voltage-distributing type offset-type power supply.T1, T2 difference
For the testing current head of input, output end.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
Fig. 1 is a kind of capacitance-voltage-distributing type offset-type power supply block diagram of the present invention:
It includes EMC circuit 1, capacitance partial pressure circuit 2, energy storage rectifier circuit 3, output circuit 4 and control circuit 5.
Just power-up, storage capacitor C1, C2 of energy storage rectifier circuit 3 are electrically charged.Direct current laminated on storage capacitor C1, C2
It is added on mains input voltage, supply output circuit 4, after linear pulsewidth modulation LPWM, generates compensation electricity in filter capacitor Co '
Δ is pressed, load voltage is equal to the algebraical sum of offset voltage Δ and mains input voltage.Adjust offset voltage Δ value, so that it may complete
Small range pressure regulation or pressure stabilizing to load voltage.
Output circuit 4 is load current ' master switch ', adjusts the phase of load current, it is made to approach input voltage phase
Position, to complete input power factor correction.Because being load current ' master switch ', mains input current and load electricity
Stream flows through same current loop, and input voltage and load voltage are, for satisfaction ' conservation of energy ', when alternating current input is electric
Force down is in load voltage, needs rectifier diode D2, D2 of rectified accumulator 3, is rectified, and completes input side and ' increases
Stream ', so that mains input current is greater than load current；Conversely, when mains input voltage is to need to open through flow increasing higher than load voltage
It closes pipe Q3, Q3 and guides the part freewheel current of output inductor Lo into capacitance partial pressure circuit 2, through C3, C4, by intrinsic
Ratio, portion of electrical current [rather than all] alternating current is flowed back to, load-side flow increasing is completed, load current is made to be greater than mains input current.
The voltage divider principle of capacitance partial pressure circuit 2 is: derided capacitors C3, C4, is by capacitance value to mains input voltage
Inverse ratio rule divided, required operating point set with this；And alternating current input belongs to constant pressure source, therefore, derided capacitors C3,
Voltage fluctuation on C4 will not change mains input voltage value, so the undulating value and derided capacitors of derided capacitors C3 voltage
The undulating value of C4 voltage, must amplitude it is equal, contrary.And the voltage fluctuation that this absolute value is equal, according to capacitor C3, C4
Capacitance can calculate respective current ripple level, with this characteristic, to control above-mentioned load flow increasing.
A kind of capacitance-voltage-distributing type offset-type power supply completes output pressure stabilizing by ' compensation ' mode.For example, nominal load is electric
Pressure value be 220V, line voltage 200V, then output circuit 4 need to export 20V, i.e., 1st/11st of bearing power, be by
Output circuit 4 provide, remaining 10/11sts, be directly to be provided by input alternating current, so as to improving efficiency, reducing cost.
The input of output circuit 4, output voltage amplitude are all very low, thus can select low pressure, high current MOS device, and
And only level-one high frequency conversion, these are also all the key factors of low cost, energy conservation.MOS device is can be directly used in parallel
, it provides great convenience to expand output power of power supply.
Energy storage rectifier circuit 3 just starts to rectify, for completing input side only when mains input voltage is lower than rated value
[flow increasing], so rectification flow very little, this is also the key factor of energy-saving and environmental protection, low cost.
Fig. 2 is that a kind of capacitance-voltage-distributing type offset-type power supply with active power factor correction circuit implements block diagram.
Operational process is similar to above-mentioned Fig. 1, is a difference in that:
Rectifier diode D1, D2 are changed to active power factor correction circuit, so as to eliminating pollution of the rectification to alternating current.
Claims (7)
1. a kind of capacitance-voltage-distributing type offset-type power supply, it is characterised in that:
A kind of capacitance-voltage-distributing type offset-type power supply, including EMC circuit 1, capacitance partial pressure circuit 2, energy storage rectifier circuit 3, output electricity
Road 4 and control circuit 5, capacitance partial pressure circuit 2 are composed in series by two derided capacitors C3, C4, are connected across and are filtered through EMC circuit 1
On alternating current input firewire H and neutral conductor N after wave；Energy storage rectifier circuit 3, be by storage capacitor C1, C2 and rectifier diode D1,
D2 composition, the cathode of storage capacitor C1 and the cathode node C of C2, the capacitor C3 for connecing capacitance partial pressure circuit 2 are filtered with through EMC circuit 1
The node of alternating current input firewire H after wave；Output circuit 4 is by half-bridge switch pipe Q1, Q2, filter inductance Lo, filter capacitor
Co ', flow increasing switching tube Q3, Q4 composition, the drain electrode of half-bridge switch pipe Q1 connect the anode of storage capacitor C1 with rectifier diode D1's
Negative pole node V+, the source electrode of half-bridge switch pipe Q2 connect the cathode of storage capacitor C2 and the cathode node V- of rectifier diode D2, and half
The source electrode of bridge switch pipe Q1 and the drain node of Q2 connect the drain node for entering end Yu flow increasing switching tube Q4 of filter inductance Lo, flow increasing
The source electrode of switching tube Q4 is connected with the source electrode of Q3, and the drain electrode of flow increasing switching tube Q3 meets derided capacitors C3, C4 of capacitance partial pressure circuit 2
Node F, meet filter capacitor Co ' one end, connect the anode and the negative pole node D of rectifier diode D2 of rectifier diode D1, filter
The outlet of another termination filter inductance Lo of wave capacitor Co ', the one end [i.e. the firewire H ' of load voltage] for meeting filter capacitor Co, filter
Alternating current input neutral line N of another termination of wave capacitor Co through EMC circuit 1.
2. a kind of capacitance-voltage-distributing type offset-type power supply according to claim 1, it is further characterized in that:
Half-bridge switch pipe Q1, Q2 and flow increasing switching tube Q3, Q4 of output circuit 4 are usually metal-oxide-semiconductor, when the width for requiring offset voltage
When being worth very big, for example, IGBT pipe can be used instead when being used for output voltage phase shift；To control rectified voltage value, energy storage rectifier circuit
3 rectifier diode D1, D2, can use instead silicon-controlled；Alternating current is done to be further reduced the non-linear clutter that rectification generates
It disturbs, rectifier diode D1, D2 of energy storage rectifier circuit 3 can also use active power factor correction circuit instead.
3. a kind of capacitance-voltage-distributing type offset-type power supply according to claim 1, it is further characterized in that:
The input of control circuit 5 is respectively from alternating current firewire H, neutral conductor N, a kind of capacitance-voltage-distributing type offset-type through EMC circuit 1
The negative pole node V+ of anode and the rectifier diode D1 of the fire wire output end H ' of power supply, storage capacitor C1, storage capacitor C2 it is negative
Cathode node V-, the input current measuring head T1 and output testing current head T2 of pole and rectifier diode D2, half-bridge switch pipe Q1,
The grid of Q2, the grid of flow increasing switching tube Q3, Q4, the source electrode of half-bridge switch pipe Q1 and Q2 drain node, flow increasing switching tube Q3
Source electrode and Q4 source node, control circuit 5 output respectively control output circuit 4 half-bridge switch pipe Q1, Q2 and flow increasing
The switch state of switching tube Q3, Q4, also control substitution rectifier diode D1, D2's is silicon-controlled.
4. a kind of capacitance-voltage-distributing type offset-type power supply according to claim 1, it is further characterized in that:
Voltage on the filter capacitor Co ' of output circuit 4, is exactly offset voltage Δ, load voltage be equal to mains input voltage with
The algebraical sum of offset voltage Δ, when mains input voltage is lower than load voltage rated value, offset voltage Δ is positive sine wave,
When mains input voltage is higher than load voltage rated value, offset voltage Δ is reversed sine wave, adjusts offset voltage Δ value, just
It can control a kind of load voltage of capacitance-voltage-distributing type offset-type power supply, to complete the small range pressure regulation or steady to load voltage
Function is pressed, so-called small range pressure regulation refers to continuous adjustment offset voltage Δ value, makes load voltage consequently also consecutive variations, but its
Changing amplitude can only be within the scope of Δ threshold voltage.
5. a kind of capacitance-voltage-distributing type offset-type power supply according to claim 1, it is further characterized in that；
All load currents all originate from output circuit 4, therefore, can control load current phase, it is made to approach alternating current input electricity
Phase is pressed, to complete input power factor correction.
6. a kind of capacitance-voltage-distributing type offset-type power supply according to claim 1, it is further characterized in that:
Capacitance partial pressure circuit 2 is a spotlight of this patent, and constituting is to go here and there derided capacitors C3, C4 of capacitance partial pressure circuit 2
After connection, it is connected across through on the filtered alternating current of EMC circuit 1 input firewire H and neutral conductor N, derided capacitors C3, C4 input alternating current
Voltage is divided by the inverse ratio rule of capacitance value, sets required operating point with this；And alternating current input belongs to constant pressure
Source, therefore, the voltage fluctuation on derided capacitors C3, C4 will not change mains input voltage value, so derided capacitors C3 voltage
Undulating value and derided capacitors C4 voltage undulating value, must amplitude it is equal, contrary, it is defeated in alternating current using this characteristic
When entering voltage higher than load voltage rated value, flow increasing switching tube Q3, Q4 are controlled, to change the filter inductance Lo of output circuit 4
Freewheeling path makes freewheel current through derided capacitors C3, C4, and in the inverse ratio ratio of the capacitance of setting, only part flows into alternating current, and
Storage capacitor C1, C2 of no longer rectified accumulator 3 all flow into alternating current, complete the flow increasing to load current with this；Capacitor
The partial pressure series of bleeder circuit 2 can increase, for example, increasing derided capacitors C5, connect with derided capacitors C3, C4, just increase by one
A alternative partial pressure output point, it is easier to meet node D and the increasing of rectifier diode D1, D2 of energy storage rectifier circuit 3
The drain electrode for flowing switching tube Q3, the partial pressure value requirement to capacitance partial pressure circuit 2.
7. a kind of capacitance-voltage-distributing type offset-type power supply according to claim 1, it is further characterized in that:
A kind of capacitance-voltage-distributing type offset-type power supply is suitable for single phase ac electric system, is also applied for three-phase alternating current system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810274563.8A CN109149967A (en) | 2018-03-30 | 2018-03-30 | A kind of capacitance-voltage-distributing type offset-type power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810274563.8A CN109149967A (en) | 2018-03-30 | 2018-03-30 | A kind of capacitance-voltage-distributing type offset-type power supply |
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| Publication Number | Publication Date |
|---|---|
| CN109149967A true CN109149967A (en) | 2019-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810274563.8A Withdrawn CN109149967A (en) | 2018-03-30 | 2018-03-30 | A kind of capacitance-voltage-distributing type offset-type power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818355A (en) * | 2019-02-15 | 2019-05-28 | 董振隆 | A kind of three port type power grid clarifiers |
| CN109861257A (en) * | 2019-02-26 | 2019-06-07 | 董振隆 | A kind of AC voltage regulator |
| CN110597338A (en) * | 2019-10-08 | 2019-12-20 | 董振隆 | Another simplest compensating voltage-stabilized source |
-
2018
- 2018-03-30 CN CN201810274563.8A patent/CN109149967A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109818355A (en) * | 2019-02-15 | 2019-05-28 | 董振隆 | A kind of three port type power grid clarifiers |
| CN109818355B (en) * | 2019-02-15 | 2020-11-24 | 董振隆 | Three-port type power grid purifier |
| CN109861257A (en) * | 2019-02-26 | 2019-06-07 | 董振隆 | A kind of AC voltage regulator |
| CN110597338A (en) * | 2019-10-08 | 2019-12-20 | 董振隆 | Another simplest compensating voltage-stabilized source |
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Application publication date: 20190104 |