WO2017038294A1 - Dc-dcコンバータ - Google Patents
Dc-dcコンバータ Download PDFInfo
- Publication number
- WO2017038294A1 WO2017038294A1 PCT/JP2016/071485 JP2016071485W WO2017038294A1 WO 2017038294 A1 WO2017038294 A1 WO 2017038294A1 JP 2016071485 W JP2016071485 W JP 2016071485W WO 2017038294 A1 WO2017038294 A1 WO 2017038294A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- switching element
- bridge circuit
- operation mode
- full bridge
- Prior art date
Links
Images
Classifications
-
- 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
- H02M3/33584—Bidirectional converters
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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 present invention relates to a DAB (Dual Active Bridge) type DC-DC converter.
- Patent Document 1 discloses a DAB converter.
- a full bridge circuit is connected to each of the primary winding and the secondary winding of the transformer, and power transmission is performed by appropriately controlling the switching phase difference between the two full bridge circuits. Do.
- ZVS zero voltage switching
- the efficiency may be reduced.
- the reactive current that does not contribute to the transmission power increases and the efficiency may deteriorate.
- an object of the present invention is to provide a DC-DC converter that can realize a ZVS operation in a wide range and always perform a high-efficiency operation even when the input / output voltage ratio is large and the load fluctuation range is wide. There is.
- the present invention includes an input unit to which a DC voltage V1 is input, an output unit to which a DC voltage V2 is output, a first full bridge circuit connected to the input unit, and a second full circuit connected to the output unit.
- a controller for controlling the switching of the first full bridge circuit.
- the first full bridge circuit includes a first switching element, a second switching element, a third switching element, and a fourth switching element.
- a first series circuit sequentially connected in series, and a fifth switching element, a sixth switching element, a seventh switching element, and an eighth switching element are sequentially connected in parallel to the first series circuit.
- a second series circuit connected in a row; a first floating capacitor connected to a connection point of the first switching element and the second switching element; and a connection point of the third switching element and the fourth switching element;
- a second floating capacitor connected to a connection point of the fifth switching element and the sixth switching element, and a connection point of the seventh switching element and the eighth switching element, and the transformer of the transformer
- the first winding has one end connected to a connection point between the second switching element and the third switching element, and the other end connected to a connection point between the sixth switching element and the seventh switching element,
- the control unit is configured so that a voltage applied to both ends of the first winding of the transformer is the DC voltage V1.
- the voltage output from the first full bridge circuit can be made different depending on whether the voltage input from the input unit is applied to the floating capacitor or not. That is, when the first full bridge circuit is operated in the full bridge operation mode or the first and second half bridge operation modes, the input / output voltage ratio is large and the fluctuation range of the load connected to the output section is wide. Even so, by increasing the ZVS range as compared with the configuration of the prior art, it is possible to suppress an increase in reactive current that does not contribute to transmission and to operate the DC-DC converter efficiently.
- first series circuit and the second series circuit constituting the first full bridge circuit are formed by connecting four switching elements in series, each element is compared with the case where two switching elements are connected in series. The voltage applied to is low. For this reason, it is not necessary to increase the element breakdown voltage of each switching element. As a result, a MOS-FET having a low on-resistance value can be used for each switching element.
- the controller outputs a five-level potential from the first full bridge circuit by switching between the full bridge operation mode and the half bridge operation mode during one cycle of the drive frequency of the first full bridge circuit. May be.
- the input unit is a first input / output unit that inputs / outputs a DC voltage
- the output unit is a second input / output unit that inputs / outputs a DC voltage
- the voltage input to the first input / output unit is The voltage input to the second input / output unit is preferably higher.
- the input voltage from the first input / output unit can be transformed over a wide range.
- the DC-DC converter of the present invention further comprises load current detection means for detecting a current flowing in a load connected to the output unit, and the control unit is based on the result detected by the load current detection means, It is preferable to switch between the full-bridge operation mode and the half-bridge operation mode.
- switching the operation mode can widen the ZVS operation range, and thus does not contribute to transmission.
- An increase in reactive current can be suppressed and the DC-DC converter can be operated efficiently.
- FIG. 1 is a circuit diagram of a DC-DC converter according to an embodiment.
- FIG. 2 is a diagram showing the relationship between the states of the eight switching elements of the full bridge circuit and the voltages.
- 3A, 3B, 3C, and 3D are equivalent circuit diagrams of the full bridge circuit in each state shown in FIG.
- FIGS. 6A, 6B, 6C, and 6D are equivalent circuit diagrams of the full bridge circuit in each state shown in FIG. FIG.
- FIG. 7 is a diagram showing a transition pattern in “one switching period” of the operation mode shown in FIG. 2 in the five-level operation mode.
- FIG. 8 is a diagram showing a transition pattern in “one switching period” of the operation mode shown in FIG. 2 in the five-level operation mode.
- FIG. 9 is a diagram showing a transition pattern “within one switching period” in the operation mode shown in FIG. 2 in the five-level operation mode.
- FIG. 10 is a diagram illustrating a voltage waveform of a voltage at each position of the full bridge circuit.
- FIG. 13 is a diagram showing the relationship between the output power of the DC-DC converter and the input / output voltage ratio.
- the DC-DC converter described below includes two full-bridge circuits, and transmits power between the two full-bridge circuits by controlling their drive frequencies to be equal and to provide a phase difference. This is a DAB type DC-DC converter.
- FIG. 1 is a circuit diagram of a DC-DC converter 1 according to this embodiment.
- the DC-DC converter 1 includes input / output terminals IO1, IO2, IO3, and IO4. A load and a DC power source are connected to the input / output terminals IO1, IO2, IO3, and IO4.
- the DC-DC converter 1 is a bidirectional DC-DC converter that transforms a DC voltage input from one of the input / output terminals IO1 and IO2 or the input / output terminals IO3 and IO4 and outputs it from the other.
- the input / output terminals IO1 and IO2 correspond to an “input unit” and a “first input / output unit” according to the present invention.
- the input / output terminals IO3 and IO4 correspond to an “output unit” and a “second input / output unit” according to the present invention.
- the input capacitor C1 and the full bridge circuit 10 are connected to the input / output terminals IO1 and IO2.
- the full bridge circuit 10 includes a first series circuit of a first switching element Q1, a second switching element Q2, a third switching element Q3, and a fourth switching element Q4, a fifth switching element Q5, a sixth switching element Q6, and a seventh switching element.
- the switching element Q7 and the second series circuit of the eighth switching element Q8 are connected in parallel.
- the first to eighth switching elements Q1 to Q8 are n-type MOS-FETs, and are formed with a body diode and a parasitic capacitance. Further, the gates of the first to eighth switching elements Q1 to Q8 are connected to the control unit 31, and the gate voltage is applied from the control unit 31 to perform switching control.
- the first to eighth switching elements Q1 to Q8 are simply referred to as switching elements Q1 to Q8.
- a conventional general full bridge circuit is configured by connecting in parallel a series circuit in which two switching elements are connected in series.
- each of the first series circuit and the second series circuit constituting the full bridge circuit 10 is formed by connecting four switching elements in series. Therefore, in the related art, two switching elements are connected in series. Compared with, the voltage applied to each element is low. For this reason, it is not necessary to increase the element breakdown voltage of each switching element. Since a switching element having a high withstand voltage generally has a large on-resistance value, a MOS-FET having a low on-resistance value can be used for each switching element.
- the full bridge circuit 10 includes a first charge / discharge capacitor Cf1 and a second charge / discharge capacitor Cf2.
- the first charge / discharge capacitor Cf1 is connected between a connection point between the first switching element Q1 and the second switching element Q2 and a connection point between the third switching element Q3 and the fourth switching element Q4.
- the second charge / discharge capacitor Cf2 is connected between a connection point between the fifth switching element Q5 and the sixth switching element Q6 and a connection point between the fifth switching element Q5 and the sixth switching element Q6.
- the full bridge circuit 10 corresponds to a “first full bridge circuit” according to the present invention.
- the first charge / discharge capacitor corresponds to a “first floating capacitor” according to the present invention, and the second charge / discharge capacitor corresponds to a “second floating capacitor” according to the present invention.
- the input capacitor C2 and the full bridge circuit 20 are connected to the input / output terminals IO3 and IO4.
- the full bridge circuit 20 includes a ninth switching element Q9 and a tenth switching element Q10 connected in series, and an eleventh switching element Q11 and a twelfth switching element Q12 connected in series.
- the ninth to twelfth switching elements Q9 to Q12 are n-type MOS-FETs, and a body diode and a parasitic capacitance are formed.
- the ninth to twelfth switching elements Q9 to Q12 have their gates connected to the control unit 32, and are subjected to switching control when a gate signal is applied from the control unit 32.
- the full bridge circuit 20 corresponds to a “second full bridge circuit” according to the present invention.
- an output voltage detection circuit 21 and a load current detection circuit 22 are provided at the input / output terminals IO3 and IO4. By attaching an overvoltage protection function and an overcurrent protection function, or by detecting a load current, it is possible to determine the weight of the load.
- the load current detection circuit 22 is an example of the “load current detection means” according to the present invention.
- a transformer T1 is connected between the full bridge circuit 10 and the full bridge circuit 20.
- the transformer T1 has a primary winding n1 and a secondary winding n2.
- the primary winding n1 has one end connected to the connection point U between the second switching element Q2 and the third switching element Q3 via the resonance coil L1, and the other end connected to the sixth switching element Q6 and the seventh switching element Q7.
- the secondary winding n2 has one end connected to a connection point between the ninth switching element Q9 and the tenth switching element Q10, and the other end connected to a connection point between the eleventh switching element Q11 and the twelfth switching element Q12. Yes.
- the turns ratio of the primary winding n1 and the secondary winding n2 is N: 1.
- the primary winding n1 of the transformer T1 corresponds to a “first winding” according to the present invention
- the secondary winding n2 corresponds to a “second winding” according to the present invention
- the full bridge circuit 10 side is a primary winding and the full bridge circuit 20 side is a secondary winding, but the full bridge circuit 10 side is a secondary winding and a full bridge circuit.
- the 10 side may be a primary winding.
- the control unit 31 controls the full bridge circuit 10 by zero voltage switching using the parasitic capacitances of the switching elements Q1 to Q8 and the resonance with the resonance coil L1. To do. Specifically, during the dead time when switching the switching element on and off, the current flowing through the resonant coil L1 is passed through the parasitic capacitance of the switching element, discharging the parasitic capacitance, and turning on the switching element with zero voltage. Thereby, switching loss, switching noise, etc. can be reduced. Instead of using the resonance coil L1, zero voltage switching may be performed by utilizing resonance between the leakage inductance of the transformer T1 and the parasitic capacitances of the switching elements Q1 to Q8.
- the DC voltage V1 is applied to the input / output terminals IO1 and IO2 of the DC-DC converter 1 configured as described above.
- the control unit 31 performs switching control of the switching elements Q1 to Q8 of the full bridge circuit 10.
- a five-level voltage Vo of 0, ⁇ V1 / 2, ⁇ V1 is applied to the primary winding n1 of the transformer T1.
- the control unit 32 performs switching control of the full bridge circuit 20 and outputs DC voltages V2 of 0, V1 / 2N, and V1 / N from the input / output terminals IO3 and IO4. That is, the full bridge circuit 10 is a five-level circuit that outputs five voltage levels.
- the DC-DC converter 1 is a three-level DC-DC converter that outputs three voltage levels.
- the DC-DC converter 1 is a bidirectional DC-DC converter, when a DC voltage is input from the input / output terminals IO3 and IO4, the full bridge circuits 10 and 20 are controlled to switch the input / output. A DC voltage is output from the terminals IO1 and IO2.
- FIG. 2 shows the relationship between the states of the eight switching elements of the full bridge circuit 10 and the voltages Vu, Vv, Vo, and the relative relationship between the charge / discharge states of the first charge / discharge capacitor Cf1 and the second charge / discharge capacitor Cf2. It is a figure which shows what was divided into.
- the voltage Vu is a voltage at the connection point U between the switching elements Q2 and Q3.
- the voltage Vv is a voltage at the connection point V of the switching elements Q6 and Q7.
- the voltage Vo is an output voltage from the full bridge circuit 10 applied to the primary winding n1 of the transformer T1, and is a potential difference between the connection point U and the connection point V.
- It is an equivalent circuit diagram of the
- the full bridge circuit 10 operates in any one of the full bridge operation mode, the half bridge operation mode, and the 5-level operation mode.
- Vo 0
- Vc1 a charging voltage of the first charging / discharging capacitor Cf1.
- Vc1 V1 / 2
- Vu V1 / 2.
- Vv Vc2.
- the full bridge circuit 10 operates in any of the full bridge operation mode, the half bridge operation mode, and the 5-level operation mode.
- FIGS. 7, 8 and 9 are diagrams showing transition patterns within “one switching period” of the operation mode shown in FIG. 2 in the five-level operation mode.
- “one switching period” means one period of the driving frequency of the first full bridge circuit in the five-level operation mode, in other words, the driving period of the transformer T1.
- “1 switching period” means a range from “t1” to “t2”.
- the “one switching period” corresponds to “one period of the driving frequency of the first full bridge circuit” of the present invention.
- FIG. 10 is a diagram illustrating voltage waveforms of the voltages Vu, Vv, and Vo at each position of the full bridge circuit 10.
- ⁇ is a phase difference between the voltages Vu and Vv.
- the period when the voltage Vo V1 is ⁇ 2 ⁇ .
- the output period of each voltage of 5 levels is adjusted by the values of ⁇ and ⁇ .
- FIG. 10 also shows switch timings of the switching elements Q9 to Q12 of the full bridge circuit 20.
- Control unit 32 turns on and off switching elements Q9 and Q12 and switching elements Q10 and Q11 at a duty ratio of 50%.
- ⁇ is a switching phase difference between the full bridge circuits 10 and 20.
- the output power of the DC-DC converter 1 is controlled by ⁇ , ⁇ , and ⁇ .
- the DC-DC converter 1 Since the DC-DC converter 1 according to the present embodiment outputs three voltage levels, the DC-DC converter 1 can be operated with high efficiency in accordance with load fluctuations of a load connected to the DC-DC converter 1. it can.
- the ZVS range In the case of a general insulated two-level DC-DC converter, the ZVS range is limited by the input / output voltage ratio and the transformer turns ratio. For this reason, when the input / output voltage ratio is large, when a light load is connected to the two-level DC-DC converter, the ZVS operation range may be exceeded, and the ZVS operation may not be performed. As a result, the reactive current that does not contribute to the transmission power increases, and the transmission efficiency of the DC-DC converter deteriorates.
- the operation mode of the DC-DC converter 1 is determined according to the load variation, so that it can be operated with high efficiency.
- a method for determining the operation mode of the full bridge circuit 10 will be described.
- FIG. 13 is a diagram showing the relationship between the output power Pout of the DC-DC converter 1 and the input / output voltage ratio.
- the input / output voltage ratio can be expressed as NV2 / V1.
- N is a turn ratio (N: 1) between the primary winding n1 and the secondary winding n2 of the transformer T1.
- Region (1) is the control range of the full-bridge operation mode
- region (2) is the control range of the half-bridge operation mode
- region (3) is the control range of the 5-level operation mode.
- the operation mode of the DC-DC converter 1 is set to the full bridge operation mode.
- the operation mode of the DC-DC converter 1 is set to the half-bridge operation mode in the region excluding the region (3) described above.
- the operation mode of the DC-DC converter 1 is set to the 5-level operation mode.
- the ZVS operation can be performed in a wide load fluctuation range, so that the reactive current can be suppressed and the DC-DC converter 1 is operated with high efficiency. be able to. Further, even in the region (3) where the conventional two-level DC-DC converter cannot perform zero voltage switching, in this embodiment, zero voltage switching is possible, and zero voltage switching in a wide load fluctuation range is possible. It becomes possible.
- switching elements Q1, Q2, Q6, Q8 are replaced with a method of alternately switching on and off switching elements Q1, Q3, Q7, Q8 and switching elements Q2, Q4, Q5, Q6.
- switching control which turns on and off switching elements Q3, Q4, Q5 and Q7 alternately may be used.
- the voltage Vo ⁇ V1 / 2 due to the current flowing through the second charge / discharge capacitor Cf2.
- the full bridge circuit 10 of the DC-DC converter 1 is configured to operate in any one of the full bridge operation mode, the half bridge operation mode, and the five level operation mode.
- the configuration may be such that it operates in a full-bridge operation mode or a half-bridge operation mode. Even in this case, since it is not necessary to provide two circuits of a full bridge circuit and a half bridge circuit, an increase in size can be suppressed.
- the voltage applied to both ends of the first winding of the transformer in the full bridge operation mode is applied to both ends of the DC winding V1 and the first winding of the transformer in the half bridge operation mode.
- the voltage is half of the DC voltage (V1 / 2), these may include some errors.
- the DC voltages V1 and V1 / 2 include a case where it fluctuates due to variations in FET parasitic capacitance, manufacturing errors, and the like.
Abstract
Description
スイッチング素子Q1,Q2,Q7,Q8がON、スイッチング素子Q3,Q4,Q5,Q6がOFFである状態では、図3(A)に示す経路で電流が流れる。この場合の出力電圧VoはV1である。この場合、電圧Vu=V1、電圧Vv=0、電圧Vo=Vu-Vv=V1である。
スイッチング素子Q3,Q4,Q5,Q6がON、スイッチング素子Q1,Q2,Q7,Q8がOFFである状態では、図3(B)に示す経路で電流が流れる。この場合、トランスT1の1次巻線n1には、図3(A)の場合と反対の極性の電圧が印加され、電圧Vu=0、電圧Vv=V1、電圧Vo=Vu-Vv=-V1である。
スイッチング素子Q1,Q3,Q6,Q8がON、スイッチング素子Q2,Q4,Q5,Q7がOFFである状態では、図3(C)に示す経路で電流が流れる。この場合、電圧Vu=V1-Vc1である。ここでVc1は第1充放電コンデンサCf1の充電電圧である。Vc1=V1/2であるとすると、電圧Vu=V1/2である。また、電圧Vv=Vc2である。ここでVc2は第2充放電コンデンサCf2の充電電圧である。Vc2=V1/2であるとすると、電圧Vu=V1/2である。そして、電圧Vo=Vu-Vv=0である。
スイッチング素子Q1,Q3,Q7,Q8がON、スイッチング素子Q2,Q4,Q5,Q6がOFFである状態では、図5(A)に示す経路で電流が流れる。この場合、電圧Vu=V1-Vc1=V1/2、電圧Vv=0、電圧Vo=Vu-Vv=V1/2である。また、スイッチング素子Q2,Q4,Q7,Q8がON、スイッチング素子Q1,Q3,Q5,Q6がOFFである状態では、図5(B)に示す経路で電流が流れる。この場合、電圧Vu=Vc1=V1/2、電圧Vv=0、電圧Vo=Vu-Vv=V1/2である。なお、電圧Vuは、図5(A)の状態時に第1充放電コンデンサCf1に充電された電圧Vc1である。
スイッチング素子Q3,Q4,Q5,Q7がON、スイッチング素子Q1,Q2,Q6,Q8がOFFである状態では、図6(A)に示す経路で電流が流れる。この場合、電圧Vu=0、電圧Vv=V1-Vc2=V1/2、電圧Vo=Vu-Vv=-V1/2である。また、スイッチング素子Q3,Q4,Q6,Q8がON、スイッチング素子Q1,Q2,Q5,Q7がOFFである状態では、図6(B)に示す経路で電流が流れる。この場合、電圧Vu=0、電圧Vv=Vc2=V1/2、電圧Vo=Vu-Vv=-V1/2である。なお、電圧Vvは、図6(A)の状態時に第2充放電コンデンサCf2に充電された電圧Vc2である。
C2…入力コンデンサ
Cf1…第1充放電コンデンサ
Cf2…第2充放電コンデンサ
L1…共振コイル
Q1~Q12…スイッチング素子
T1…トランス
1…DC-DCコンバータ
IO1,IO2,IO3,IO4…入出力端子
n1…1次巻線
n2…2次巻線
10,20…フルブリッジ回路
21…出力電圧検出回路
22…負荷電流検出回路
31,32…制御部
Claims (4)
- 直流電圧V1が入力される入力部と、
直流電圧V2が出力される出力部と、
前記入力部に接続される第1フルブリッジ回路と、
前記出力部に接続される第2フルブリッジ回路と、
磁気結合する第1巻線及び第2巻線を有し、前記第1巻線が前記第1フルブリッジ回路に接続され、前記第2巻線が前記第2フルブリッジ回路に接続されたトランスと、
前記第1フルブリッジ回路をスイッチング制御する制御部と、
を備え、
前記第1フルブリッジ回路は、
第1スイッチング素子、第2スイッチング素子、第3スイッチング素子及び第4スイッチング素子が順次直列接続された第1直列回路と、
前記第1直列回路に並列接続され、第5スイッチング素子、第6スイッチング素子、第7スイッチング素子及び第8スイッチング素子が順次直列接続された第2直列回路と、
前記第1スイッチング素子及び前記第2スイッチング素子の接続点と、前記第3スイッチング素子及び前記第4スイッチング素子の接続点とに接続された第1フローティングキャパシタと、
前記第5スイッチング素子及び前記第6スイッチング素子の接続点と、前記第7スイッチング素子及び前記第8スイッチング素子の接続点とに接続された第2フローティングキャパシタと、
を有し、
前記トランスの前記第1巻線は、
一端が前記第2スイッチング素子と前記第3スイッチング素子との接続点に接続され、他端が前記第6スイッチング素子と前記第7スイッチング素子との接続点に接続され、
前記制御部は、
前記トランスの前記第1巻線の両端に印加される電圧が、前記直流電圧V1となるように前記第1~第8スイッチング素子を制御するフルブリッジ動作モードと、
前記トランスの前記第1巻線の両端に印加される電圧が、前記直流電圧V1の半分となるように前記第1~第8スイッチング素子を制御するハーフブリッジ動作モードと、
の少なくとも2つのモードで前記第1フルブリッジ回路をスイッチング制御する、
DC-DCコンバータ。 - 前記制御部は、
前記第1フルブリッジ回路の駆動周波数の1周期中に、前記フルブリッジ動作モードと前記ハーフブリッジ動作モードとを切り替えることによって、前記第1フルブリッジ回路から5レベルの電位を出力する、
請求項1に記載のDC-DCコンバータ。 - 前記入力部は、直流電圧を入出力する第1入出力部であり、
前記出力部は、直流電圧を入出力する第2入出力部であり、前記第1入出力部に入力される電圧は、前記第2入出力部に入力される電圧よりも高い、
請求項1又は2に記載のDC-DCコンバータ。 - 前記出力部に接続される負荷に流れる電流を検出する負荷電流検出手段をさらに備え、
前記制御部は、
前記負荷電流検出手段によって検出された結果に基づいて、前記フルブリッジ動作モードと前記ハーフブリッジ動作モードとを切り替える、
請求項1から3の何れかに記載のDC-DCコンバータ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017537647A JP6477893B2 (ja) | 2015-08-28 | 2016-07-22 | Dc−dcコンバータ |
DE112016003507.1T DE112016003507T5 (de) | 2015-08-28 | 2016-07-22 | Gleichspannungswandler |
US15/904,679 US10171004B2 (en) | 2015-08-28 | 2018-02-26 | DC-DC converter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015-169417 | 2015-08-28 | ||
JP2015169417 | 2015-08-28 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/904,679 Continuation US10171004B2 (en) | 2015-08-28 | 2018-02-26 | DC-DC converter |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017038294A1 true WO2017038294A1 (ja) | 2017-03-09 |
Family
ID=58188777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/071485 WO2017038294A1 (ja) | 2015-08-28 | 2016-07-22 | Dc-dcコンバータ |
Country Status (4)
Country | Link |
---|---|
US (1) | US10171004B2 (ja) |
JP (1) | JP6477893B2 (ja) |
DE (1) | DE112016003507T5 (ja) |
WO (1) | WO2017038294A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2018159437A1 (ja) * | 2017-03-14 | 2020-04-16 | 株式会社村田製作所 | Dc−dcコンバータ |
WO2020137633A1 (ja) * | 2018-12-27 | 2020-07-02 | 東芝インフラシステムズ株式会社 | 電力変換装置 |
JP7293001B2 (ja) | 2018-12-27 | 2023-06-19 | 東芝インフラシステムズ株式会社 | 電力変換装置 |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018159437A1 (ja) * | 2017-03-01 | 2018-09-07 | 株式会社村田製作所 | Dc-dcコンバータ |
JP6902962B2 (ja) * | 2017-08-22 | 2021-07-14 | ダイヤモンド電機株式会社 | コンバータ |
JP6951222B2 (ja) * | 2017-12-06 | 2021-10-20 | シャープ株式会社 | 電力変換装置及び電力変換システム |
US10938319B2 (en) | 2018-12-27 | 2021-03-02 | Toshiba Infrastructure Systems & Solutions Corporation | Power conversion apparatus |
CN111446860B (zh) * | 2019-01-16 | 2021-09-21 | 台达电子企业管理(上海)有限公司 | 直流/直流变换器及其控制方法 |
CN111446861B (zh) | 2019-01-16 | 2021-02-26 | 台达电子企业管理(上海)有限公司 | 直流/直流变换器及其控制方法 |
DE102019212887A1 (de) * | 2019-08-28 | 2021-03-04 | Robert Bosch Gmbh | Ansteuerverfahren für einen Gleichspannungswandler und Gleichspannungswandler |
DE102019216911A1 (de) * | 2019-11-04 | 2021-05-06 | Robert Bosch Gmbh | Stromrichter und verfahren zum betreiben eines stromrichters |
CN111224553A (zh) * | 2020-03-09 | 2020-06-02 | 合肥博鳌电气科技有限公司 | 一种改进的双向半桥三电平llc直流变换器及其同步控制方法 |
CN113517817A (zh) * | 2021-06-07 | 2021-10-19 | 燕山大学 | 三电平双向全桥llclc多谐振变换器拓扑 |
US20230072823A1 (en) * | 2021-09-03 | 2023-03-09 | L3Harris Technologies, Inc. | Method and Apparatus for Absorption of High Energy Load Feedback in Degaussing Applications |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013013220A (ja) * | 2011-06-29 | 2013-01-17 | Mitsubishi Electric Corp | 電力変換装置 |
CN103684017A (zh) * | 2012-09-21 | 2014-03-26 | 成都市思博睿科技有限公司 | 级联五电平输出电容箝位桥式变频器 |
JP2014508495A (ja) * | 2011-03-01 | 2014-04-03 | ライニシュ−ヴェストファーリシュ−テクニシェ ホーホシューレ アーヘン | 双方向dc−dcコンバータ |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5355294A (en) | 1992-11-25 | 1994-10-11 | General Electric Company | Unity power factor control for dual active bridge converter |
JP5437312B2 (ja) * | 2011-05-31 | 2014-03-12 | 日産自動車株式会社 | 電力変換装置 |
JP5377574B2 (ja) * | 2011-05-31 | 2013-12-25 | 日産自動車株式会社 | 電力変換装置 |
JP5377573B2 (ja) * | 2011-05-31 | 2013-12-25 | 日産自動車株式会社 | 電力変換装置 |
JP5377575B2 (ja) * | 2011-05-31 | 2013-12-25 | 日産自動車株式会社 | 電力変換装置 |
JP5437313B2 (ja) * | 2011-05-31 | 2014-03-12 | 日産自動車株式会社 | 電力変換装置 |
JP5377604B2 (ja) * | 2011-09-06 | 2013-12-25 | 日産自動車株式会社 | 電力変換装置 |
JP5377603B2 (ja) * | 2011-09-06 | 2013-12-25 | 日産自動車株式会社 | 電力変換装置 |
JP5437334B2 (ja) * | 2011-09-06 | 2014-03-12 | 日産自動車株式会社 | 電力変換装置 |
WO2013051476A1 (ja) * | 2011-10-07 | 2013-04-11 | 日産自動車株式会社 | 電力変換装置 |
JP5476510B2 (ja) * | 2011-10-07 | 2014-04-23 | 日産自動車株式会社 | 電力変換装置 |
CN104205605B (zh) * | 2012-03-26 | 2017-03-08 | 株式会社村田制作所 | 逆变器装置 |
JP5598513B2 (ja) * | 2012-08-29 | 2014-10-01 | 株式会社村田製作所 | 電力系統連系インバータ装置 |
-
2016
- 2016-07-22 JP JP2017537647A patent/JP6477893B2/ja active Active
- 2016-07-22 WO PCT/JP2016/071485 patent/WO2017038294A1/ja active Application Filing
- 2016-07-22 DE DE112016003507.1T patent/DE112016003507T5/de not_active Ceased
-
2018
- 2018-02-26 US US15/904,679 patent/US10171004B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014508495A (ja) * | 2011-03-01 | 2014-04-03 | ライニシュ−ヴェストファーリシュ−テクニシェ ホーホシューレ アーヘン | 双方向dc−dcコンバータ |
JP2013013220A (ja) * | 2011-06-29 | 2013-01-17 | Mitsubishi Electric Corp | 電力変換装置 |
CN103684017A (zh) * | 2012-09-21 | 2014-03-26 | 成都市思博睿科技有限公司 | 级联五电平输出电容箝位桥式变频器 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2018159437A1 (ja) * | 2017-03-14 | 2020-04-16 | 株式会社村田製作所 | Dc−dcコンバータ |
WO2020137633A1 (ja) * | 2018-12-27 | 2020-07-02 | 東芝インフラシステムズ株式会社 | 電力変換装置 |
JP7293001B2 (ja) | 2018-12-27 | 2023-06-19 | 東芝インフラシステムズ株式会社 | 電力変換装置 |
Also Published As
Publication number | Publication date |
---|---|
JP6477893B2 (ja) | 2019-03-06 |
US20180183345A1 (en) | 2018-06-28 |
US10171004B2 (en) | 2019-01-01 |
DE112016003507T5 (de) | 2018-04-19 |
JPWO2017038294A1 (ja) | 2018-06-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6477893B2 (ja) | Dc−dcコンバータ | |
WO2018159437A1 (ja) | Dc-dcコンバータ | |
JP5556859B2 (ja) | 電流共振型dcdcコンバータ | |
JP6271099B1 (ja) | 直流電圧変換回路 | |
JP5434370B2 (ja) | 共振型スイッチング電源装置 | |
US9570991B2 (en) | Bidirectional DC/DC converter | |
US7405955B2 (en) | Switching power supply unit and voltage converting method | |
WO2018061286A1 (ja) | 電力変換装置 | |
JP4391496B2 (ja) | Dc−dcコンバータ | |
JP6241334B2 (ja) | 電流共振型dcdcコンバータ | |
TW202316780A (zh) | Llc諧振轉換器、電源電路及其產生輸出電壓的方法 | |
US9484841B2 (en) | Inverter device | |
JP2007318999A (ja) | スイッチング電源装置 | |
JP6711449B2 (ja) | Dc−dcコンバータ | |
JP5510846B2 (ja) | 共振型dcdcコンバータ | |
CN111869076A (zh) | 直流电压变换电路以及电源装置 | |
JP4434010B2 (ja) | 直流変換装置 | |
JP4635584B2 (ja) | スイッチング電源装置 | |
KR101435469B1 (ko) | 영전압 스위칭 직류-직류 컨버터 | |
WO2020208936A1 (ja) | 直流変換装置 | |
JP6234651B1 (ja) | 電力変換装置 | |
JP2020022307A (ja) | 電源装置及び電源装置の制御方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16841326 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2017537647 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 112016003507 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16841326 Country of ref document: EP Kind code of ref document: A1 |