CN107612305A - The method of preposition quasi- Z sources lifting switch power supply electric work efficiency - Google Patents
The method of preposition quasi- Z sources lifting switch power supply electric work efficiency Download PDFInfo
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- CN107612305A CN107612305A CN201711104683.5A CN201711104683A CN107612305A CN 107612305 A CN107612305 A CN 107612305A CN 201711104683 A CN201711104683 A CN 201711104683A CN 107612305 A CN107612305 A CN 107612305A
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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
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- 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 invention discloses the method for preposition quasi- Z sources lifting switch power supply electric work efficiency, and diode D is connected simultaneously in the direct-current input power supplying anode of Switching Power SupplyINNegative pole and inductance L one end, diode DINPositive pole connection electric capacity CINOne end, electric capacity CINThe other end connects the inductance L other ends, by inductance L, diode DINWith electric capacity CINForm quasi- Z sources, inductance L and electric capacity CINSeries resonance particular harmonic frequency in input current ripple, the harmonic energy is converted into electric capacity CINVoltage injection Switching Power Supply inside bus, lifted busbar voltage.The inventive method realizes the recycling of the energy of input current ripple or surge in lifting switch power source internal busbar voltage and provides vulnerabilities scan device power supply inside Switching Power Supply, constrains the ripple factor of input current, lifting switch power supply entirety electric work efficiency.
Description
Technical field
The invention belongs to switch power technology field, the side of more particularly to preposition quasi- Z sources lifting switch power supply electric work efficiency
Method.
Background technology
With the fast development of Power Electronic Technique, Switching Power Supply is widely used in the national defences such as Aeronautics and Astronautics, navigation
And the civil area such as power system, communications and transportation, post and telecommunications, Industry Control.It is main in particular with oil, coal and natural gas etc.
Energy growing tension is wanted, the development and utilization of new energy is increasingly valued by people.Utilize the crucial skill of new energy
Art --- Switching Power Supply, the direct current energy of other new energy conversion such as battery, solar cell and fuel cell can be converted
Into AC energy and network grid-connected power.Therefore, switch power technology has heavy to closing in the development and utilization field of new energy
The status wanted.
At this stage in technology, conventional Switching Power Supply necessarily leads to ripple, and the generation of ripple necessarily lead to it is expendable
Ripple is lost.The method directly filtered more using LCL filter for current ripples at present, it is not used recovery；Separately
Outside, more methods using one power module of increase in Switching Power Supply, power for controller MCU, cause inefficient.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of method of preposition quasi- Z sources lifting switch power supply electric work efficiency,
The recycling of the energy of input current ripple or surge is realized in lifting switch power source internal busbar voltage and switch electricity is provided
Vulnerabilities scan device power supply inside source, constrain the ripple factor of input current, lifting switch power supply entirety electric work efficiency.
The present invention adopts the following technical scheme that solution above-mentioned technical problem：
The method of preposition quasi- Z sources lifting switch power supply electric work efficiency, Switching Power Supply direct-current input power supplying anode simultaneously
Connect diode DINNegative pole and inductance L one end, diode DINPositive pole connection electric capacity CINOne end, electric capacity CINThe other end connects
The inductance L other ends are connect, by inductance L, diode DINWith electric capacity CINForm quasi- Z sources, inductance L and electric capacity CINSeries resonance is in input
A particular harmonic frequency in current ripples, the harmonic energy is converted into electric capacity CINVoltage injection Switching Power Supply inside mother
Line, lift busbar voltage.
It is additionally included between the direct-current input power supplying negative terminal of Switching Power Supply and earth terminal GND and concatenates power transformer AM primary
Winding N1, power transformer AM armature windings N1 couple electromagnetic energy add to secondary windings N2, secondary windings N2 inductance
Inductance Lf0Total inductance respectively with electric capacity CV1, electric capacity CV2Form two series resonant tanks：First series resonant tank electric current by
Secondary windings N2 different names end is successively through inductance Lf0, electric capacity CV1, diode DV1Positive pole to negative pole, return to the same of secondary windings N2
Name end；Second series resonant tank electric current is by secondary windings N2 Same Name of Ends successively through diode DV2Positive pole to negative pole, electric capacity
CV2, inductance Lf0Return to secondary windings N2 Same Name of Ends；Diode DV1Positive pole connection earth terminal GND；Above-mentioned two series resonance
Loop occurs series resonance and obtains electric capacity C respectivelyV1With electric capacity CV2The direct current of voltage sum, by Zener diode DZ voltage stabilizings
The controller MUC being supplied to afterwards as operating voltage inside Switching Power Supply.
The circuit topology of use also includes forceful electric power performance loop and controller MCU startup power supply circuit；
The forceful electric power performance loop is divided into output current positive half-wave loop and output current bears half-wave loop：
Output current positive half-wave loop：Electric current is from direct-current input power supplying VINAnode outflow, flow through inductance L, electric power successively
Electronic switch Q1 drains and source electrode, inductance Lf1, inductance Lf2, load R0, inductance Lf3, inductance Lf4, electronic power switch Q3 drain electrode and
Source electrode, power transformer AM armature winding N1 Same Name of Ends to different name end, return to direct-current input power supplying VINNegative terminal；
Output current bears half-wave loop：Electric current is from direct-current input power supplying VINAnode outflow, flow through inductance L, electric power successively
Electronic switch Q2 source electrodes and drain electrode, inductance Lf4, inductance Lf3, load R0, inductance Lf2, inductance Lf1, electronic power switch Q4 source electrodes and
Drain electrode, power transformer AM armature windings N1 Same Name of Ends return to direct-current input power supplying V to different name endINNegative terminal；
The electronic power switch Q1, electronic power switch Q2, electronic power switch Q3, electronic power switch Q4 are
MOSFET is managed；Electronic power switch Q1, electronic power switch Q2, electronic power switch Q3 and electronic power switch Q4 grid point
Controller MCU I/O interfaces P1, P2, P3 and P4 Dui Ying not connected；Controller MCU works in PWM ripples regulation and control dutycycle mode,
PWM the ripple PWM2 and PWM4 of same polarity, and PWM the ripple PWM1 and PWM3 of reversed polarity, corresponding regulation and control power electronics are exported respectively
Switch Q2, electronic power switch Q4, electronic power switch Q1, electronic power switch Q3 dutycycle；
The startup power supply circuit of the controller MCU is：
Before controller MCU startups, by Switching Power Supply internal bus voltage, through resistance RVWith resistance RV1Partial pressure obtains voltage
VF, voltage VFBy diode D5 through resistance RV0As startup voltage after isolation, then through resistance RB, obtained by Zener diode DZ voltage stabilizings
To burning voltage VZPowered to controller MCU, controller MCU starts.
The inductance Lf1, inductance Lf2, inductance Lf3With inductance Lf4, respectively with electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4With
And electric capacity Cf1, electric capacity Cf2, electric capacity Cf3, electric capacity Cf4Multiple series resonant tanks are formed, are tuned in different humorous of input current respectively
Wave frequency rate, harmonic energy is fed back to Switching Power Supply internal bus respectively, physical circuit open up for：The electronic power switch Q1's
Shunt capacitance C between source electrode and drain electrode1, electronic power switch Q2 source electrode and drain electrode between shunt capacitance C2, electronic power switch
Shunt capacitance C between Q3 source electrode and drain electrode3, electronic power switch Q4 source electrode and drain electrode between shunt capacitance C4；Electric capacity Cf1
It is connected to Switching Power Supply internal bus and inductance Lf1With inductance Lf2Points of common connection between, electric capacity Cf2It is connected to inductance Lf1With
Inductance Lf2Points of common connection and earth terminal GND between, electric capacity Cf3It is connected to inductance Lf3With inductance Lf4Points of common connection with connecing
Between ground terminal GND, electric capacity Cf4It is connected to Switching Power Supply internal bus and inductance Lf3With inductance Lf4Points of common connection between；Electricity
Hold Cf1, electric capacity Cf2, electric capacity and electric capacity Cf4, one diode of each electric capacity both ends reverse parallel connection.
Also include load current feedback circuit and busbar voltage monitoring negative voltage feedback circuit,
Load current feedback circuit：By direct-current input power supplying VINNegative terminal and current transformer AM armature winding N1 it is different
The points of common connection at name end is connected to controller MCU sample connection rs1 as feedback point；
Busbar voltage monitors negative voltage feedback circuit：Switching Power Supply internal bus series resistor RVWith resistance RV1Connect afterwards
Ground terminal GND, resistance RVWith resistance RV1Points of common connection be sequentially connected resistance RFEarth terminal GND is met again with resistance R1；Resistance RFWith
Resistance R1 points of common connection connection controller MCU sample connection rs2.
The advantage of the invention is that：
(1) surge of Switching Power Supply input current or ripple are certainly existed, and prior art is generally pressed down with LCL filter
System, not only increase cost and loss can be increased, reduce the overall electric work efficiency of Switching Power Supply.And the present invention uses preposition quasi- Z sources
Method, the energy of input current ripple or surge convert DC energy, lifting switch power source internal busbar voltage, constrain it is defeated
Enter the ripple factor of electric current, on the premise of identical power output, reduce switching current, reduce thermal losses, lifting switch electricity
Source entirety electric work efficiency.
(2) present invention is directly proportional to current squaring according to being lost, and electric work efficiency is inversely proportional with current squaring, using " exchange
Current transformer " principle, pick up vulnerabilities scan device power supply electricity of the energy of input current ripple or surge as the Switching Power Supply
Source, the overall electric work efficiency of lifting switch power supply.
Brief description of the drawings
Fig. 1 is the circuit topology figure of the inventive method.
Embodiment
The specific embodiment of the invention is elaborated below in conjunction with drawings and examples, but does not form and the present invention is weighed
The limitation of the claimed scope of profit.
Traditional switch power supply generally requires adds a monolithic IC Switching Power Supply, the power supply for vulnerabilities scan chip in addition
VDD.Cost is not only added, also increases loss rate loss.The inventive method utilizes resonance principle, recovery input current THD%
The energy of larger six harmonic frequencies relatively with recovery value of energy, is converted into DC energy in 31 subharmonic；Utilize product
Prime factor Q increases passive voltage multiplication factor.
As shown in figure 1, to flow through load R0 electric current from left to right for positive direction, current loop is when forceful electric power works：
(1) during positive half-wave, electric current is from input power VINAnode outflow, flow through successively inductance L, electronic power switch Q1 leakage
Pole and source electrode, inductance Lf1, inductance Lf2, load R0, inductance Lf3, inductance Lf4, electronic power switch Q3 drain electrode and source electrode, power supply it is mutual
Sensor AM armature winding N1 Same Name of Ends returns to input power V to different name endINNegative terminal.
(2) when bearing half-wave, electric current is from input power VINAnode outflow, flow through inductance L, electronic power switch Q2 sources successively
Pole and drain electrode, inductance Lf4, inductance Lf3, load R0, inductance Lf2, inductance Lf1, electronic power switch Q4 source electrodes and drain electrode, power supply it is mutual
Sensor AM armature windings N1 Same Name of Ends returns to input power V to different name endINNegative terminal.
In inductance L connection input powers VINAnode points of common connection connection diode DINNegative pole, diode DIN's
Positive pole connection electric capacity CINOne end, electric capacity CINThe other end connects the inductance L other ends.By inductance L, diode DINWith electric capacity CINForm
Quasi- Z sources.Quasi- Z sources effect is LC resonance in some specific frequency, and its object is to reclaim energy in input current THD%
Maximum harmonic energy.It finally shows as, electric capacity CINWith the energy at inductance L points of common connection, after LC resonance, than defeated
Enter power supply VINAnode energy it is high, then busbar voltage is improved, so as to improve electric work efficiency.As for electric capacity CINIt is public with inductance L
Current direction after tie point, it is believed that the shunting of current loop when being forceful electric power work：
Shunting circuit during positive half-wave：Shunt current is from electric capacity CINFlowed out with inductance L points of common connection, flow through electricity successively
Power electronic switch Q1 drains and source electrode, inductance Lf1, inductance Lf2, load R0, inductance Lf3, inductance Lf4, electronic power switch Q3 drain electrode
With source electrode, diode D0, electric capacity CIN, return to electric capacity CINWith inductance L points of common connection.Shunting circuit during negative half-wave is similarly.
The present invention makes high voltage bus voltage be more than input power V using preposition quasi- Z sourcesINOperation principle：
During the positive half-wave of input current THD% ripples (or positive pole pulsation surge), quasi- Z sources LC loop resonances, deposit inductance L
Energy storage capacity.During the negative half-wave of input current THD% ripples (or positive pole pulsation surge), inductance L freewheel currents are through electric capacity CINWith two
Pole pipe DINSeries resonance is formed, i.e., input current THD% ripple electric energy is converted into electric capacity CINVoltage.By diode DIN
Electric capacity CINElectric energy injection high voltage bus.So, it can both constrain the ripple factor of input current, utilize inductance L and electric capacity again
CINSeries resonance maximum harmonic frequency of harmonic energy content in input current ripple, realizes the mesh for lifting overall electric work efficiency
's.Diode DINUsing high-frequency diode (nanoseconds of 1A 600V 35).Bus anode recovers energy, and lifts busbar voltage, carries
High electric work efficiency.
Power transformer AM secondary windings N2 inductance adds inductance Lf0Total inductance respectively with electric capacity CV1With electric capacity CV2Shape
Into series resonant tank, inductance Lf1、Lf2、Lf3、Lf4Respectively with electric capacity C1、C2、C3、C4And Cf1、Cf2、Cf3、Cf4Form multiple strings
Join resonant tank, be tuned in the larger each harmonic wave frequency relatively with recovery value of resonant energy in input current THD% respectively
Rate, by diode Df1、Df2、Df3、Df4Clamped rectification is realized, harmonic energy feedback supplement to power source bus, realizes lifting electric work
Efficiency.Therefore, diode Df1、Df2、Df3、Df4Use high-frequency diode (1A 600V 35ns).Physical circuit topology is：Institute
State shunt capacitance C between electronic power switch Q1 source electrode and drain electrode1, electronic power switch Q2 source electrode and drain electrode between it is in parallel
Electric capacity C2, electronic power switch Q3 source electrode and drain electrode between shunt capacitance C3, electronic power switch Q4 source electrode and drain electrode between
Shunt capacitance C4；Electric capacity Cf1It is connected to Switching Power Supply internal bus and inductance Lf1With inductance Lf2Points of common connection between, electric capacity
Cf2It is connected to inductance Lf1With inductance Lf2Points of common connection and earth terminal GND between, electric capacity Cf3It is connected to inductance Lf3And inductance
Lf4Points of common connection and earth terminal GND between, electric capacity Cf4It is connected to Switching Power Supply internal bus and inductance Lf3With inductance Lf4's
Between points of common connection；Electric capacity Cf1, electric capacity Cf2, electric capacity and electric capacity Cf4Both ends difference anti-parallel diodes Df1、Df2、Df3、
Df4.Diode D1, D2, D3, D4 are respectively electronic power switch Q1, Q2, Q3, Q4 body diode.
Controller MCU works in PWM ripples regulation and control dutycycle mode, respectively with the PWM2 and PWM4 of same polarity, and antipole
Property PWM1 and PWM3, it is corresponding regulate and control firm type full-bridge topology electronic power switch Q2, Q4, Q1, Q3 dutycycle.Controller
MCU four I/O interfaces P1, P2, P3 and P4 are connected respectively electronic power switch Q1, Q2, Q3, Q4 grid, controller
MCU connects load current feedback and busbar voltage monitoring negative voltage feedback by sample connection rs1 with rs2 respectively, according to electric current
Analysis calculating is carried out with sample and voltage sampling data, generates PWM ripples respectively with the duty of every electronic power switch of accuracy controlling
Than.Electronic power switch Q1, Q2, Q3, Q4 are managed using MOSFET.
Load current feedback is by input power VINNegative terminal and current transformer AM armature winding N1 different name end
Points of common connection is connected to controller MCU sample connection rs1 as feedback point.Current transformer AM armature winding N1's is same
Name termination earth terminal GND, load current is after current transformer AM armature winding N1 is flowed through, due to current transformer AM itself
There is the resistance of a very little, then pressure drop is being produced at feedback point.Then, the Voltage Feedback of feedback point is given to controller MCU, it is real
Existing current feedback.The simple Ohm's law relations of U/R be present in current feedback and the voltage of the feedback point.Due to current transformer AM
Armature winding N1 termination earth terminal GND of the same name, so the voltage of the feedback point is actually negative voltage.
Busbar voltage monitoring negative voltage is fed back to：Busbar voltage is through resistance RVWith resistance RV1Partial pressure obtains voltage bus monitoring electricity
Press VF, voltage VFMore than controller MCU that provides starts energy, after steady operation, voltage VFThrough resistance RFDivide with resistance R1
Pressure, there is provided the sample connection rs2 that a negative voltage feeds back to controller MCU is sampled.
The Absorption Capacitance C in parallel with electronic power switch respectivelyf1、Cf2、Cf3、Cf4, oscillograph sees every switch during by debugging
Pipe VDSPulse burr, on the premise of it can absorb frequency glitches, as far as possible using small capacitances.
Method of supplying power to is as follows when controller MCU startup and steady operation：
The present invention utilizes power transformer AM armature windings N1 electromagnetic energy, is coupled to secondary windings N2, utilizes secondary
Winding N2 inductance is plus tune resonant inductance Lf0Total inductance, with electric capacity CV1With electric capacity CV2Generation series resonance, obtains direct current
Electricity, by resistance RBPlace obtains voltage stabilizing Vz after Zener diode DZ, then reaches woods by NPN-PNP by three pole T1 and triode T2
Connection of pausing obtains the power vd D pins that burning voltage is supplied to controller MUC.Bus negative terminal recovers energy, there is provided voltage stabilizing is to control
Device MUC power supplies processed.
Controller MCU starts power supply mode：Before controller MCU startups, by high voltage bus voltage, through resistance RVWith electricity
Hinder RV1Partial pressure obtains voltage bus monitoring voltage VF, by diode D5 (model 1N4007) through resistance RV0Isolation, as start voltage,
Again through resistance RB, a stable 15V or so voltage can be obtained by Zener diode DZ, afterwards by NPN type triode T1's
15-0.6=14.4V power vd D pin powered of the burning voltage to controller MCU is obtained after PN junction, controller MCU is opened
It is dynamic.Triode T1 and triode T2 uses Darlington connection, and it is an object of the present invention to provide a big electric current, so that controller MCU
Supply voltage is more stable.
Controller MCU steady operation power supply modes：After controller MCU steady operations, power transformer AM armature windings N1
Electromagnetic energy, be coupled to secondary windings N2.First series resonant tank electric current is by secondary windings N2 different names end successively through inductance
Lf0, electric capacity CV1, diode DV1Positive pole secondary windings N2 Same Name of Ends is returned to negative pole；Second series resonant tank electric current by
Secondary windings N2 Same Name of Ends is successively through diode DV2Positive pole to negative pole, electric capacity CV2, inductance Lf0Return to the of the same name of secondary windings N2
End.Above-mentioned two series resonant tank adds inductance L using secondary windings N2 inductancef0Total inductance, respectively with electric capacity CV1With
Electric capacity CV2Generation series resonance, obtain electric capacity CV1With electric capacity CV2The dc source of voltage sum, then through resistance RB, by Zener two
Pole pipe DZ voltage stabilizings, then obtain burning voltage by NPN-PNP Darlington connections by triode T1 and triode T2 and give controller MUC
Power vd D pin powereds.It is specifically intended that electric capacity CV1With electric capacity CV2Voltage sum, it is necessary to monitor electricity than voltage bus
Press VFIt is high.It can so make diode D5 reverse-biased, so as to make startup power supply mode fail after steady operation.
The present invention as shown in Figure 1 is the non-isolated output topologys of DC-AC, again can be with if adding rectification circuit in output end
Realize non-isolated direct current output, i.e. DC-DC topologys；Isolation circuit can also be added in output end, realize that isolated DC is defeated
Go out.
Claims (5)
1. the method for preposition quasi- Z sources lifting switch power supply electric work efficiency, it is characterised in that in the direct-current input power supplying of Switching Power Supply
Anode connects diode D simultaneouslyINNegative pole and inductance L one end, diode DINPositive pole connection electric capacity CINOne end, electric capacity CIN
The other end connects the inductance L other ends, by inductance L, diode DINWith electric capacity CINForm quasi- Z sources, inductance L and electric capacity CINConnect humorous
Shake a particular harmonic frequency in input current ripple, the harmonic energy is converted into electric capacity CINVoltage injection Switching Power Supply
Internal bus, lift busbar voltage.
2. the method for preposition quasi- Z sources lifting switch power supply electric work efficiency as claimed in claim 1, it is characterised in that also include
Power transformer AM armature winding N1 are concatenated between the direct-current input power supplying negative terminal and earth terminal GND of Switching Power Supply, power supply is mutual
Sensor AM armature windings N1 couple electromagnetic energy adds inductance L to secondary windings N2, secondary windings N2 inductancef0Total inductance
Respectively with electric capacity CV1, electric capacity CV2Form two series resonant tanks：First series resonant tank electric current is by secondary windings N2 different names
End is successively through inductance Lf0, electric capacity CV1, diode DV1Positive pole to negative pole, return to secondary windings N2 Same Name of Ends；Second series connection is humorous
Loop current of shaking is by secondary windings N2 Same Name of Ends successively through diode DV2Positive pole to negative pole, electric capacity CV2, inductance Lf0Return to secondary
Winding N2 Same Name of Ends；Diode DV1Positive pole connection earth terminal GND；Above-mentioned two series resonant tank is connected humorous respectively
Shake to obtain electric capacity CV1With electric capacity CV2The direct current of voltage sum, provided after Zener diode DZ voltage stabilizings as operating voltage
To the controller MUC inside Switching Power Supply.
3. the method for preposition quasi- Z sources lifting switch power supply electric work efficiency as claimed in claim 2, it is characterised in that use
Circuit topology also includes forceful electric power performance loop and controller MCU startup power supply circuit；
The forceful electric power performance loop is divided into output current positive half-wave loop and output current bears half-wave loop：
Output current positive half-wave loop：Electric current is from direct-current input power supplying VINAnode outflow, flow through inductance L, power electronics successively
Switch Q1 drain electrodes and source electrode, inductance Lf1, inductance Lf2, load R0, inductance Lf3, inductance Lf4, electronic power switch Q3 drain electrode and source
Pole, power transformer AM armature winding N1 Same Name of Ends to different name end, return to direct-current input power supplying VINNegative terminal；
Output current bears half-wave loop：Electric current is from direct-current input power supplying VINAnode outflow, flow through inductance L, power electronics successively
Switch Q2 source electrodes and drain electrode, inductance Lf4, inductance Lf3, load R0, inductance Lf2, inductance Lf1, electronic power switch Q4 source electrodes and leakage
Pole, power transformer AM armature windings N1 Same Name of Ends return to direct-current input power supplying V to different name endINNegative terminal；
The electronic power switch Q1, electronic power switch Q2, electronic power switch Q3, electronic power switch Q4 are MOSFET
Pipe；Electronic power switch Q1, electronic power switch Q2, electronic power switch Q3 and electronic power switch Q4 grid correspond to respectively
Connect controller MCU I/O interfaces P1, P2, P3 and P4；Controller MCU works in PWM ripples regulation and control dutycycle mode, defeated respectively
Go out PWM the ripple PWM2 and PWM4 of same polarity, and PWM the ripple PWM1 and PWM3 of reversed polarity, it is corresponding regulate and control electronic power switch Q2,
Electronic power switch Q4, electronic power switch Q1, electronic power switch Q3 dutycycle；
The startup power supply circuit of the controller MCU is：
Before controller MCU startups, by Switching Power Supply internal bus voltage, through resistance RVWith resistance RV1Partial pressure obtains voltage VF, electricity
Press VFBy diode D5 through resistance RV0As startup voltage after isolation, then through resistance RB, obtained surely by Zener diode DZ voltage stabilizings
Determine voltage VZPowered to controller MCU, controller MCU starts.
4. the method for preposition quasi- Z sources lifting switch power supply electric work efficiency as claimed in claim 3, it is characterised in that the electricity
Feel Lf1, inductance Lf2, inductance Lf3With inductance Lf4, respectively with electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4And electric capacity Cf1, electric capacity
Cf2, electric capacity Cf3, electric capacity Cf4Form multiple series resonant tanks, be tuned in the different harmonic frequency of input current respectively, respectively
Harmonic energy feeds back to Switching Power Supply internal bus, physical circuit open up for：The source electrode of the electronic power switch Q1 and drain electrode
Between shunt capacitance C1, electronic power switch Q2 source electrode and drain electrode between shunt capacitance C2, electronic power switch Q3 source electrode and leakage
Shunt capacitance C between pole3, electronic power switch Q4 source electrode and drain electrode between shunt capacitance C4；Electric capacity Cf1It is connected to switch electricity
Source internal bus and inductance Lf1With inductance Lf2Points of common connection between, electric capacity Cf2It is connected to inductance Lf1With inductance Lf2It is public
Between tie point and earth terminal GND, electric capacity Cf3It is connected to inductance Lf3With inductance Lf4Points of common connection and earth terminal GND between,
Electric capacity Cf4It is connected to Switching Power Supply internal bus and inductance Lf3With inductance Lf4Points of common connection between；Electric capacity Cf1, electric capacity Cf2、
Electric capacity and electric capacity Cf4, one diode of each electric capacity both ends reverse parallel connection.
5. the method for preposition quasi- Z sources lifting switch power supply electric work efficiency as claimed in claim 3, it is characterised in that also include
Load current feedback circuit and busbar voltage monitoring negative voltage feedback circuit,
Load current feedback circuit：By direct-current input power supplying VINNegative terminal and current transformer AM armature winding N1 different name end
Points of common connection controller MCU sample connection rs1 is connected to as feedback point；
Busbar voltage monitors negative voltage feedback circuit：Switching Power Supply internal bus series resistor RVWith resistance RV1After connect earth terminal
GND, resistance RVWith resistance RV1Points of common connection be sequentially connected resistance RFEarth terminal GND is met again with resistance R1；Resistance RFAnd resistance
R1 points of common connection connection controller MCU sample connection rs2.
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| CN110113013A (en) * | 2019-06-27 | 2019-08-09 | 中国电子科技集团公司第五十四研究所 | A kind of high octave ultra wide band input matching circuit for low-noise amplifier |
| CN110247539A (en) * | 2019-06-21 | 2019-09-17 | 广州宝善电子科技有限公司 | A method of reducing Switching Power Supply standby energy consumption |
| CN112953175A (en) * | 2021-03-15 | 2021-06-11 | 杭州必易微电子有限公司 | Isolated voltage conversion system and primary side control circuit and method |
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| CN110247539A (en) * | 2019-06-21 | 2019-09-17 | 广州宝善电子科技有限公司 | A method of reducing Switching Power Supply standby energy consumption |
| CN110113013A (en) * | 2019-06-27 | 2019-08-09 | 中国电子科技集团公司第五十四研究所 | A kind of high octave ultra wide band input matching circuit for low-noise amplifier |
| CN110113013B (en) * | 2019-06-27 | 2024-03-22 | 中国电子科技集团公司第五十四研究所 | High octave ultra-wideband input matching circuit for low noise amplifier |
| CN112953175A (en) * | 2021-03-15 | 2021-06-11 | 杭州必易微电子有限公司 | Isolated voltage conversion system and primary side control circuit and method |
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