WO2020103831A1 - 一种开关电源 - Google Patents
一种开关电源Info
- Publication number
- WO2020103831A1 WO2020103831A1 PCT/CN2019/119499 CN2019119499W WO2020103831A1 WO 2020103831 A1 WO2020103831 A1 WO 2020103831A1 CN 2019119499 W CN2019119499 W CN 2019119499W WO 2020103831 A1 WO2020103831 A1 WO 2020103831A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- switch tube
- circuit
- current
- switch
- capacitor
- Prior art date
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
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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
Definitions
- the embodiments of the present application relate to but are not limited to power electronic conversion technology, such as a switching power supply.
- the embodiments of the present application provide a switching power supply, which can achieve current sharing.
- An embodiment of the present application provides a switching power supply, including: a first switch tube circuit configured to convert an input first DC current into a first AC current; an N-way parallel resonant cavity circuit configured to convert the first The AC current is converted into a second AC current; where the i-th parallel resonant cavity circuit includes an i-th resonant capacitor connected in series, an i-th winding coupled with a resonant inductor, and an i-th transformer, i is greater than or equal to 1 and less than Or an integer equal to N, where N is an integer greater than or equal to 2; the second switch tube circuit is configured to rectify and convert the second alternating current into a second direct current.
- FIG. 1 is a schematic structural diagram of a switching power supply according to an embodiment of this application.
- FIG. 2 is a schematic diagram of a coupled resonance inductor provided by an embodiment of the present application.
- FIG. 3 is a schematic circuit diagram of a switching power supply realized by an uncoupled resonance inductor provided by an embodiment of the present application;
- FIG. 4 is a schematic diagram of an implementation circuit of a switching power supply according to an embodiment of the present application.
- FIG. 5 is a schematic diagram of another switching power supply implementation circuit provided by an embodiment of the present application.
- FIG. 6 is a schematic diagram of yet another circuit for implementing a switching power supply according to an embodiment of the present application.
- an embodiment of the present application proposes a switching power supply, including a first switching tube circuit 101, an N-way resonant cavity circuit 102, and a second switching tube circuit 103.
- the first switch circuit 101 is configured to convert the input first DC current into a first AC current.
- the N-way parallel resonant cavity circuit 102 is configured to convert the first AC current into a second AC current; wherein, the i-th parallel resonant cavity circuit includes an i-th resonance capacitor connected in series and a i-th Windings and the i-th transformer, i is an integer greater than or equal to 1 and less than or equal to N, and N is an integer greater than or equal to 2.
- the second switch tube circuit 103 is configured to rectify and convert the second alternating current into a second direct current.
- the coupled resonant inductor includes: a magnetic core and N windings, the N windings are wound on the center column or side column of the magnetic core, and N windings Since the magnetic fields generated by the current changes are superimposed on each other, the number of turns of the N windings is the same.
- the coupled resonant inductor plays a role of current sharing. In the absence of the coupled resonant inductor, the resonant cavity will be prone to uneven current.
- the following analysis will be carried out: 3 Taking N as 2 as an example, a circuit schematic diagram of a switching power supply implemented by an uncoupled resonant inductor according to an embodiment of the present application is given. As shown in FIG. 3, when there is no deviation between the resonant inductance 1 and the resonant inductance 2, there is no deviation between the two currents. In the actual circuit, there are deviations in the component parameters.
- the following situations may exist: (1) When 1 is 5% upward and resonance inductor 2 is 5% downward, the current deviation between i 1 and i 2 is about 20%; (2) 10% is above resonance inductor 1 and 10% is below resonance inductor 2 (most In the case of bad conditions), the current deviation between i 1 and i 2 is about 40%.
- the uneven current is a physical quantity that characterizes the difference between the currents flowing through the two resonant inductors.
- FIG. 2 The structure of the coupled resonant inductance is shown in FIG. 2. Since the two windings of the coupled resonant inductance are in the same direction as above, the magnetic flux generated by the two windings is superimposed when the current flows as shown in FIG. In the case where the current of one of the windings increases, such as when the current i 1 of the winding 1 increases, the winding 2 hinders the increase of the magnetic flux, because the characteristic of the inductance is to hinder the change of the magnetic flux in the magnetic circuit, thus hindering the increase of i 1 . Similarly, when i 1 decreases, winding 2 impedes the reduction of i 1 .
- L 1 is the self-inductance coefficient of winding 1
- M is the mutual inductance coefficient
- i 2 is the current of winding 2
- L 2 is the self-inductance coefficient of the winding 2.
- the voltage across winding 1 is the voltage across winding 1
- the voltage across winding 2 is the voltage across winding 2
- u cr1 denote the terminal voltage of the first resonant capacitor of the first resonant cavity circuit
- C cr1 is the capacitance value of the first resonant capacitor
- i cr1 the current of the first resonant capacitor of the first resonant cavity circuit
- u L1 represents the first The voltage across the resonant inductance of the 1st resonant cavity circuit
- i L1 represents the current of the resonant inductance of the 1st resonant cavity circuit.
- i cr1 equal to i L1; represents a terminal voltage of the second resonant circuit second capacitor resonant cavity path by u cr2,
- C cr2 is the capacitance of the capacitor of the second harmonic, i cr2 second resonator circuit path
- Current of the second resonant capacitor i L2 represents the current of the resonant inductor of the second resonant cavity circuit
- u L2 represents the voltage across the resonant inductor of the second resonant cavity circuit, due to the resonant inductance of the second resonant cavity circuit ( That is, the second winding of the coupled resonant inductor) and the second resonant capacitor are connected in series, so i cr2 is equal to i L2 .
- the coupling structure for the i cr1 resonant inductor tends to decrease, for i cr2 tends to increase, thereby suppressing the cavity of the first current path resonator circuit, increasing the second current path cavity resonator circuit, the final Form a closed-loop negative feedback, so that the two currents are the same.
- FIG. 4 shows the implementation circuit diagram of a switching power supply provided by the embodiment of the present application when N is 2 as an example
- FIG. 5 shows the embodiment of the present application when N is 3 as an example Provide another schematic diagram of the realization of the switching power supply circuit. As shown in FIGS.
- the first switch tube circuit 101 includes: a first switch tube VT1, a second switch tube VT2, a third switch tube VT3, and a fourth switch tube VT4; wherein, the first switch tube VT1 The first end of the first DC current is connected to the first end of the third switching tube VT3, and the second end of the first switching tube VT1 is connected to the first end of the second switching tube VT2 And the first end of the N-channel parallel resonant cavity circuit; the second end of the second switching tube VT2 is connected to the second end of the fourth switching tube VT4 and the second end of the first DC current The second end of the third switching tube VT3 is connected to the first end of the fourth switching tube VT4 and the second end of the N-way parallel resonant cavity circuit.
- the second switch tube circuit 103 includes: a fifth switch tube VT5, a sixth switch tube VT6, a seventh switch tube VT7, and an eighth switch tube VT8; wherein, the first end of the fifth switch tube VT5 is connected to the The first end of the second direct current and the first end of the seventh switch VT7, the second end of the fifth switch VT5 is connected to the third end of the N-way parallel resonant cavity circuit and the first The first end of the six switch VT6; the second end of the sixth switch VT6 is connected to the second end of the second direct current and the second end of the eighth switch VT8; the seventh switch The second end of VT7 is connected to the first end of the eighth switching tube VT8 and the fourth end of the N-way parallel resonant cavity circuit.
- the first switch tube circuit and the second switch tube circuit in the embodiments of the present application may also adopt other implementation methods, and the implementation methods are not used to limit the protection scope of the embodiments of the present application.
- a schematic circuit diagram of yet another switching power supply provided by an embodiment of the present application is provided. As shown in FIG.
- the first switch tube circuit 101 includes: a first switch tube VT1, a second switch tube VT2, a first capacitor C1 and a second capacitor C2; wherein, the first end of the first switch tube VT1 is connected The first end of the first direct current and the first end of the first capacitor C1, the second end of the first switch VT1 is connected to the first end of the second switch VT2 and the N way The first end of the parallel resonant cavity circuit; the second end of the second switching tube VT2 is connected to the second end of the second capacitor C2 and the second end of the first direct current; the first capacitor C1 The second end of is connected to the first end of the second capacitor C2 and the second end of the N-way parallel resonant cavity circuit.
- the second switch tube circuit 103 includes: a third capacitor C3, a fourth capacitor C4, a seventh switch tube VT7, and an eighth switch tube VT8; wherein, the first end of the third capacitor C3 is connected to the second DC current The first end and the first end of the seventh switch VT7, the second end of the third capacitor C3 is connected to the third end of the N-way parallel resonant cavity circuit and the first end of the fourth capacitor C4 End; the second end of the fourth capacitor C4 is connected to the second end of the second direct current and the second end of the eighth switching tube VT8; the second end of the seventh switching tube VT7 is connected to the The first end of the eighth switching tube VT8 and the fourth end of the N-way parallel resonant cavity circuit.
- the current of the resonant cavity circuit is divided into N parts, i 1 , i 2 ,..., I N , due to the current It is divided into N parts, so the current stress of the resonant capacitor is greatly reduced, which also reduces the heating of the resonant capacitor. Similarly, the heat of the transformer is also reduced.
- the first end of the i-th resonance capacitor is connected to the first end of the N-way parallel resonant cavity circuit, and the second end of the i-th resonance capacitor is connected to the first end of the i-th winding coupled to the resonance inductor;
- the second end of the i-th winding of the coupled resonant inductor is connected to the first end of the primary side of the i-th transformer;
- the second end of the primary side of the i-th transformer is connected to the second end of the N-way parallel resonant cavity circuit, the i-th transformer
- the first end of the secondary side is connected to the third end of the N-way parallel resonant cavity circuit, and the second end of the i-th transformer is connected to the fourth end of the N-way parallel resonant cavity circuit.
- the N-channel resonant cavity circuit of the embodiment of the present application shares a switching tube, and the switching tubes can be connected in parallel, which simplifies the driving circuit of the switching tube;
- the embodiment of the present application is divided into N-channel resonant cavity circuits, and the current of each resonant cavity circuit is reduced to 1 / N, the line loss is lower, and the heat generation is smaller;
- the N-way resonant cavity circuit of the present application has N sets of resonant capacitors and transformers, which dissipate heat and facilitate design;
- the embodiment of the present application implements the resonant cavity circuit based on the coupled resonant inductor, greatly The uneven current of the N-way resonator circuit is reduced.
- computer storage media includes both volatile and nonvolatile implemented in any method or technology for storing information such as computer readable instructions, data structures, program modules, or other data Sex, removable and non-removable media.
- Computer storage media include but are not limited to RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, magnetic tape, magnetic disk storage or other magnetic storage devices, or may Any other medium for storing desired information and accessible by a computer.
- the communication medium generally contains computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium .
- Embodiments of the present application include: a first switch tube circuit configured to convert an input first DC current into a first AC current; an N-channel parallel resonant cavity circuit configured to convert a first AC current into a second AC current;
- the i-th parallel resonant cavity circuit includes an i-th resonant capacitor connected in series, an i-th winding coupled with a resonant inductor, and an i-th transformer.
- I is an integer greater than or equal to 1 and less than or equal to N, and N is greater than Or an integer equal to 2;
- the second switch tube circuit is configured to rectify and convert the second alternating current into the second direct current.
- the embodiment of the present application implements a resonant cavity circuit based on a coupled resonant inductor, and realizes current sharing.
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- Power Engineering (AREA)
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Abstract
Description
Claims (6)
- 一种开关电源,包括:第一开关管电路,设置为将输入的第一直流电流转换成第一交流电流;N路并联的谐振腔电路,设置为将所述第一交流电流转换成第二交流电流;其中,第i路并联的谐振腔电路包括串联连接的第i谐振电容、耦合谐振电感的第i个绕组和第i变压器,i为大于或等于1,且小于或等于N的整数,N为大于或等于2的整数;第二开关管电路,设置为将所述第二交流电流进行整流,以转换成第二直流电流。
- 根据权利要求1所述的开关电源,其中,所述耦合谐振电感包括:一个磁芯和N个绕组;所述N个绕组绕制在所述磁芯的中柱或者边柱上,所述N个绕组由于电流变化所产生的磁场相互叠加,所述N个绕组的匝数相同。
- 根据权利要求1所述的开关电源,其中,所述第一开关管电路包括:第一开关管、第二开关管、第三开关管和第四开关管;所述第一开关管的第一端连接所述第一直流电流的第一端和所述第三开关管的第一端,所述第一开关管的第二端连接所述第二开关管的第一端和所述N路并联的谐振腔电路的第一端;所述第二开关管的第二端连接所述第四开关管的第二端和所述第一直流电流的第二端;所述第三开关管的第二端连接所述第四开关管的第一端和所述N路并联的谐振腔电路的第二端。
- 根据权利要求1所述的开关电源,其中,所述第一开关管电路包括:第一开关管、第二开关管、第一电容和第二电容;所述第一开关管的第一端连接所述第一直流电流的第一端和所述第一电容的第一端,所述第一开关管的第二端连接所述第二开关管的第一端和所述N路并联的谐振腔电路的第一端;所述第二开关管的第二端连接所述第二电容的第二端和所述第一直流电流的第二端;所述第一电容的第二端连接所述第二电容的第一端和所述N路并联的谐振腔电路的第二端。
- 根据权利要求1所述的开关电源,其中,所述第二开关管电路包括:第五开关管、第六开关管、第七开关管和第八开关管;所述第五开关管的第一端连接所述第二直流电流的第一端和所述第七开关管的第一端,所述第五开关管的第二端连接所述N路并联的谐振腔电路的第三端和所述第六开关管的第一端;所述第六开关管的第二端连接所述第二直流电流的第二端和所述第八开关管的第二端;所述第七开关管的第二端连接所述第八开关管的第一端和所述N路并联的谐振腔电路的第四端。
- 根据权利要求1所述的开关电源,其中,所述第二开关管电路包括:第三电容、第四电容、第七开关管和第八开关管;所述第三电容的第一端连接所述第二直流电流的第一端和所述第七开关管的第一端,所述第三电容的第二端连接所述N路并联的谐振腔电路的第三端和所述第四电容的第一端;所述第四电容的第二端连接所述第二直流电流的第二端和所述第八开关管的第二端;所述第七开关管的第二端连接所述第八开关管的第一端和所述N路并联的谐振腔电路的第四端。
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CN201811374396.0A CN111200362A (zh) | 2018-11-19 | 2018-11-19 | 一种开关电源 |
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- 2018-11-19 CN CN201811374396.0A patent/CN111200362A/zh active Pending
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CN108964469A (zh) * | 2018-07-16 | 2018-12-07 | 江南大学 | 一种并串联结构的全桥双llc谐振变换器 |
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