TW201021384A - Efficient bidirectional conversion device - Google Patents

Abstract

An efficient bidirectional conversion device is adapted to be installed between a first energy storage unit and a second energy storage unit and comprises a coupling circuit, a first switch, a second switch, a third switch, a fourth switch and a first capacitor. The coupling circuit comprises a first winding and a second winding. With the switch of the switches, the energy of the first energy storage unit can be released to the second energy storage unit or the energy of the second energy storage unit can be released to the first energy storage unit. The conduction loss of the switches can be effectively reduced by voltage clamping, synchronous recitation, zero voltage switching and zero current switching; in addition, to fully make use of element specifications, the magnitude of current at the high and low voltage sides of the coupling circuit is strictly defined, such that the device of this invention has low switch loss and low conduction loss to achieve high conversion efficiency.

Description

201021384 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a conversion device, and more particularly to a high-performance bidirectional conversion device for DC-DC. [Prior Art]

As shown in Fig. 1, U.S. Patent No. 7,382,113 B2 proposes a conventional bidirectional conversion device suitable for being placed between a power storage, a pool & and a capacitor g and capable of bidirectionally converting energy to enable energy The battery is discharged toward the capacitor Q or by a capacitor. Release to the battery ^ direction. When the energy release direction is from the battery to the capacitor ^, then the battery 匕 is used as a source, the charge of the load is charged; and when the energy release direction is from the electricity valley CV to the battery & The capacitor c is used as a power source to charge the battery pack as a load. The bidirectional conversion device includes: a coupling circuit i, a first switch, a second switch 102, a third switch 1〇3, a first diode (1), a pole body 112, and a third diode 113. a first capacitor a!, a second capacitor 122, and an inductor 13. The crane circuit 1 includes a first winding u and a second winding 。. And each of the windings 11, 12 has a -polar point end and a - non-polar point end. The polarity end of the first winding 11 is electrically connected to the battery. The first switch 101 is electrically connected between the non-polar point end of the first winding U and the ground and is switchable between a conducting state and a non-conducting state. The first pole body ln has an anode electrically connected to a non-polar point end of the first winding U, and a cathode. 5 201021384 The first capacitor 121 is electrically connected between the cathode of the first diode u and the ground. The third diode 113 has an anode electrically connected to the cathode of the first diode ui, and a cathode. The second capacitor 122 is electrically connected between the non-polar dot end of the second winding 12 and the cathode of the third diode 113. The second diode 112 has an anode electrically connected to the ground, and a cathode 〇 electrically connected between the polarity end of the first winding u and the cathode of the second diode 112. The second switch 1G2 is electrically connected to the cathode of the second diode 112 and the cathode m of the second body 113 and is switchable between a conducting state and a non-conducting state. The third switch 103 is switchable between an on state and a non-conducting state, and has a first end electrically connected to the cathode of the third diode 113 and a second end electrically connected to the capacitor. According to the required energy release direction, the bidirectional conversion device performs corresponding switching so that the energy flows from the battery to the capacitor c or from the capacitor Ca/ to the battery, and the detailed operation of the bidirectional converter can be referred to. This patent case is not described here. Briefly < 'This conventional bidirectional conversion device has the following disadvantages: an additional inductance and multiple diodes are required to perform the bidirectional conversion function, especially the diode conduction loss is more than each switch having the same: rectification function The flexible switching effect of all switches is not obvious, so the conversion efficiency needs to be further improved, and the whole circuit is costly and bulky due to the external inductance 201021384. SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a high-performance bidirectional conversion device which has high conversion efficiency and can avoid the above-mentioned conventional deficiencies. The 咼 performance bidirectional conversion device is adapted to be disposed between a first energy storage unit and a second energy storage unit, and includes: a coupling circuit including a first winding, and a second winding, and each winding Having a first end and a second end, the first end of the first winding is electrically connected to the first energy storage unit, and the second end of the first winding is electrically connected to the first end of the second winding; a first switch having a first end electrically connected to the second end of the first winding and a grounded second end, and switchable between a conductive state and a non-conductive state; a second switch having an electrical connection a first end and a second end of the second end of the first winding, and switchable between a conducting state and a non-conducting state, a third switch having a first end electrically connected to the second end of the second switch And a second end electrically connected to the second end of the second winding, and switchable between a conductive state and a non-conductive state; a fourth switch having a first end electrically connected to the second end of the third switch And electrically connected to the second end of the second energy storage unit, Switching between a conducting state and a non-conducting state; and - the first capacitor is electrically connected between the second end of the second switch and the ground 201021384 by switching the switches to enable the first energy storage unit The energy is released to the second energy storage unit or the energy of the second energy storage unit is released to the first energy storage unit. The invention has the effect of using only four power semiconductor switching elements, that is, the control of the bidirectional current, and the voltage clamping, the synchronous rectification and the zero voltage switching and the zero current switching manner effectively reduce the conduction loss of the switch, and the consumption circuit is strict. The currents of the high and low voltage sides are divided to fully utilize the component specifications, so that the device has the characteristics of low switching loss and low conduction loss to achieve high conversion efficiency. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. As shown in FIG. 2, the preferred embodiment of the high-performance bidirectional conversion device of the present invention is adapted to be disposed between a first energy storage unit and a second energy storage unit, and can perform bidirectional conversion of energy to be first. The energy storage unit is released toward the second energy storage unit or released by the second energy storage unit toward the first energy storage unit. When the energy release direction is from the first energy storage unit to the second energy storage Cuiyuan, the first energy storage unit acts as a power source to charge the second casting energy unit as a load; and when the energy release direction is When the second energy storage unit is in the first energy storage unit, the second energy storage unit is charged as the first energy storage unit as the load. In the present embodiment, the battery includes a battery, and the first energy storage unit uses a battery as an example for a fuel cell, a solar cell, etc. - and 201021384 the first energy storage unit can also be other DC power generation farms. Set, and not limited to these. In this embodiment, the second energy storage unit is an output capacitor as an example, but is not limited thereto. In the embodiment, the first energy storage unit is a low-lying (four) energy component compared to the second energy storage unit, and the second energy storage unit can be incorporated into a high-voltage busbar. The preferred embodiment of the bidirectional conversion device includes: a coupling circuit VIII, a first-open I" second switch & a third switch & a fourth switch & a first capacitor C; And a second capacitor

The coupling circuit rr includes two windings (Fig., respectively - first-to-one and one second, two and one), and each winding has a first end (which is a polarity end) And a second end (which is a non-polar point end). The polarity end of the first winding is electrically connected to the battery, and the non-polar point end of the first winding 4 is electrically connected to the polarity end of the second winding h The first switch-ample has a first end electrically connected to the non-polar end of the first winding z and a grounded second end, and is switchable between a conducting state and a non-conducting state. § Switch & Having a first Λ* and a second end electrically connected to the non-polar point end of the first winding, and switchable between an on state and a non-conduction state. The first switch & has an electrical connection to the The second end of the second switch & the second end 'and the second end' can be switched between the on state and the non-conducting state. The fourth switch & has an electrical connection to the second end of the third switch & The first end of 201021384 and an electrical connection are connected to the second end of the output capacitor, and can be in a conducting state and not conducting Inter-state switching. The first capacitor is electrically connected between the second end of the second switch & ground. The second capacitor C" 2 is electrically connected to the second end of the third switch & Between the non-polar end of winding b. According to the required energy release direction, the high-efficiency bidirectional converter will perform the corresponding switching so that the energy flows from the output capacitor c" to the battery or from the battery to the output capacitor. When the capacitor is discharged from the capacitor to the battery, the voltage of the output capacitor is reduced in the process of energy transmission through the south-efficiency bidirectional conversion device, and then the battery is supplied to the battery, so that the battery obtains a voltage lower than the output capacitor. When the energy flows from the battery to the output capacitor, the voltage is boosted by the high-efficiency bidirectional conversion device to increase the voltage of the battery L to the output capacitor Ch, so that the output capacitor obtains a voltage higher than the battery. Referred to as the boost mode at this time, when the buck mode is executed, the fourth switch & turn-on and turn-off © 'control error or release coupling circuit 7; The quantity 'to adjust the voltage of the battery factory ί. The other three switches &, 5^ & with the fourth switch * SV switch, the timing operation is when the fourth switch & first turn on, followed by the second switch & Re-conducting, and when the fourth switch core and the second switch & are not turned on, the 'first switch' and the third switch & are simultaneously turned on. When the boost mode is executed, mainly by the third switch A Turn on and off 'control storage or release the energy of the coupling circuit eight' to adjust the voltage of the output power 10 201021384. The remaining three switches &, & && with the first switch & switching, timing operation is The first switch & is turned on first, and then the third switch A is turned on again, and after the first switch & and the third switch & are not turned on, the second switch & and the fourth switch & The following is a description of the operation of the entire circuit for both the buck and boost aspects. A·Bucking aspect: Referring to Figure 3, according to the switching of the four switches &amper &, &, &, &, the high efficiency monthly b bidirectional converter will operate in seven modes, as shown in Figure 4 below. Explain separately for each mode, and it is worth noting that, for convenience of explanation, the first energy storage unit of the mode® 4~1 wipe is directly represented by a battery, and the second energy storage unit directly uses the output power $G. Said. The parameters of ^ and 匕4 in Fig. 3 and Fig. 2 respectively represent the voltage, heart, and the control terminals of the first switch & second switch & first switch & Do not represent the current flowing through the first winding, the current flowing through the second winding & the parameters represent the current flowing through the first switch & the voltage across the first switch & The parameters respectively represent the current flowing through the second switch & the voltage parameters at the two ends of the second switch & respectively represent the current drawn through the third switch & the voltage Ά parameter at the two ends of the third switch & The current flowing through the fourth „ ^, the voltage across the fourth switch A. Mode 1 (Time:: Refer to Figure 4, in this mode, the second switch & and the fourth switch is turned on – time The remaining switches are not turned on. And in Figure 4, the current path is shown in this mode at 11 201021384. And for the sake of convenience, the non-conducting switch (in this mode is: the first switch and the third switch d) The battery is charged. The battery is charged: the output electric current C" provides a current through the fourth 'switch, the second capacitor 匸2 and the first winding' and then splits into two path currents, and the current flows through the first winding 1 />for battery The electrical charge of the first capacitor c7:

Another current is passed to the first capacitor via the second switch & Charging, and

Vzj* and the parameters are the voltage of the first winding 〇 and the voltage of the second winding k, respectively. The relationship between the two is such that the voltage 6 of the output capacitor can be expressed as V»=VC2+Vls+vlp+Vl=(<N + 1) Vu>+Vci^Vl (7) The first vsi = VL + switch & is non-conducting, and its voltage across is ~=vcl (3) mode two (time W2):

As shown, in the mode, the second switch & and the fourth switch = have been turned on for a period of time while the remaining switches are not conducting. The direction of the current path in this mode is indicated in Figure 5. The it capacitor C is marked; it begins to discharge to the battery via the first winding, and the current flowing through ^ _ 2 is turned, and the remaining paths maintain the previous mode operation. Mode 3 (Time: W3): As shown in Figure 6 - No. In this mode, all switches are not conducting, and 12 201021384 Figure 6 shows the direction of the current path in this mode. Leakage energy release: When the fourth switch core is not conducting, because the leakage inductance of the first winding and the second winding Zs and the energy of the & must be released, the current of the first winding I? flows through the first switch & The base diode is freewheeling, and the current L of the second winding is freewheeled through the first capacitor ς and the base diode path of the third switch & the first switch & and the third switch & The two ends are zero voltage to switch to zero voltage in the next mode.

Mode 4 (time: r3~r4): As shown in Fig. 7, in this mode, the first switch & and the third switch & start to conduct and the remaining switches are not turned on. And the direction of the current path in this mode is indicated in Figure 7. Because in the former mode, the base diodes of the first switch & and the third switch & have been turned on, this mode starts to turn on the two openings A, & to become synchronous rectification with low conduction loss ( Synchr〇n〇us generation... state. When the leakage inductance energy of the second winding is released, the current through the third switch & and the third switch & zero electrical waste is turned on, so there is no switching loss. 'The second capacitor c2 is discharged to the second winding, induced to the first winding by magnetic path induction and releases energy to the battery. Let the duty cycle of the fourth switch & 4 be 4 , the transient time of the crossover, the target, 丨d & 〜 relationship is 4 and ^ conduction responsibility cycle ^ 4 + name = 1 (4) 13 201021384 The voltage of the first winding Vip is equal to the voltage of the battery &;, according to V 〇 lt-Second Balance, the voltage L of the first winding 模式 in mode one is VLP = ^x[(li/4)M] (5) Substituting the above formula into the equation (3), the first capacitor C is obtained; the voltage Vci is vci=^+vi/)=Fi/ii4=vsl (6) The first capacitor C/the voltage vcl is also Same as the first switch & cross voltage ~, using the above formula, the voltage % of the second capacitor q can be calculated as VC2 = V „ - VC1 = ^ + 1 / ^) (7) ❹ Equations (5) and (7) Substituting equation (2) can find the step-down ratio % is ^=VjVH=dJ{N^2) (8) Substituting the above formula into equation (6) can obtain ^sl=K/(JV + 2) = vS2 (9) When the turns ratio is fixed to N, the voltage across the first switch & and the second switch & VS1 is related to the voltage 4 of the output capacitor, regardless of the duty cycle 4 of the fourth switch & Therefore, a low-voltage low-conductance metal oxide semi-conducting field effect transistor (MOSFET) can be used as the switch. 〇 mode five (time: ί4~ί5): As shown in Fig. 8, in this mode, each switch It is not conductive, and the direction of the current path in this mode is marked in Figure 8. When the first switch Α and the third switch & are not conducting, because of the leakage inductance of the first winding k and the second winding core 4] There is still energy release from the heart, so the first winding current k flows through the base diode of the first switch & and the current 匕 of the second winding L passes through the second capacitor q and the fourth switch &; Based on 14 201021384 diodes continue to flow to the output capacitor, causing the fourth switch to zero voltage across the 'wait for the next mode for zero voltage switching. Mode six (time: 匕): as shown in Figure 9. It is shown that in this mode, the fourth switch core is turned on and the remaining switches are not turned on. And in Fig. 9, it is indicated that in this mode, the current path is shifted to 0 because the base diode of the fourth switch & is turned on, so that the fourth switch & turns on with zero voltage switching characteristics. When the first winding ", the leakage inductance energy release of the second winding L is completed, the two winding currents reverse" respectively charge the parasitic capacitance of the first switch & and discharge the parasitic capacitance of the second switch & Mode 7 (time ί6~ί.): As shown in Figure 10, in this mode, the fourth switch & continues to conduct and the second switch is turned on during the mode seven, and the remaining switches are not The current flowing through the coupling circuit 7 is as in the previous mode, and the other difference is: when the voltage across the first switch & is higher than the voltage of the first capacitor Q, the base of the second switch & The body is turned on, and at this time, the second switch & conduction has a zero current switching characteristic and a synchronous rectification function. * When the current k of the first winding b is reversed, it returns to mode 1. Β·boost: ancient ▲ According to the switching of the four switches &, &, &, &, the horse performance bidirectional conversion device will operate in seven modes, as shown in the following Figures 12~18 15 201021384 for each mode Description, and again, for convenience of explanation, mode The first energy storage unit is directly represented by a battery pack, and the second energy storage unit is directly represented by an output capacitor c" mode one (time:: see Fig. 12, in this mode, the first switch & The third switch & has been turned on for a while and the remaining switches are not turned on. And in Figure 12, the direction of the current path is indicated in this mode.

The current h of the switch & is from two paths, one of which flows from the battery to the first winding, and the current includes the first sensed induced current and the exciting current. In addition, a current is charged from the first capacitor through the third switch ^, the second winding U and the second capacitor C2, so the voltage VC2 of the second capacitor C2 is expressed as vC2=A^+vcl 〇〇) mode 2 (time) :: Refer to Figure 13. In this mode 2, all switches are not conducting, and 13 is marked with the trend of the current path in this mode.

When the first switch and the third switch ^ are not conducting, in order to ensure the current of the first group and the group Ls, the current body of the first winding core is at the same time. The voltage of the two windings l, the voltage v across the charging of the parasitic capacitance of the first switch &ample rises rapidly, and the voltage of the n昧 switch terminal ^the second _& the parasitic capacitance terminal voltage VSZ is released until the electric passenger When the voltage at both ends is equal to the voltage v〇 of the valley G, this mode ends. Mode 3 (Time: Ί): Refer to Figure 14, in this mode, all switches are not conducting. And 16 201021384 14 In this mode three, the direction of the current path. When the voltage at the two ends of the first switch & is higher than the first, the second opening ... the base diode is turned on to provide a current path; = the leakage inductance of a winding I Released to the first capacitor q for charging. The voltage of the first capacitor 令 causes the duty cycle vcl of the first switch to be related to the voltage of the battery as vn=VL+vLP=vsx=VLl{\-dx). YS2 (11)

At the same time, 'the steering of the current L of the second winding L causes the parasitic capacitance of the third switch & to be charged' and the fourth switch m generates the capacitor for discharge and clamps each other. The highest crossover voltage of the switch & VS3=VS4 = VH-VCI (12) Mode 4 (Time: i3~f4): Referring to Figure 15, in this mode, the second switch ^ and the fourth _ & are turned on and the remaining switches are not turned on. And in Figure 15, the course of the current path is shown in this mode. When the two switches & and the base diode are turned on, the two switches &, & are turned on to complete synchronous rectification and reduce conduction loss. At this time, the voltage of the second winding 4 is positive at the non-polar point, and its value is =^ = ^, /(1-^) (13) The voltage of the battery G, the voltage center of the first winding 、, the second winding The voltage core is connected in series with the voltage vcz of the second capacitor C2, and flows to the output capacitor CV in a low current mode. The voltage FH of the output capacitor Ch can be obtained from the equations (1〇), (11) and (13) as follows: .

Vh=Vl+vlp+ vC2 + νω = (2 + N)Vl /(1 - dx) (14) 17 201021384

Gy2=VH/VL=(2 + N)/(i^di) 〇5) Substituting equation (11) into the square—the program (15) can obtain the first switch & cross voltage vsi=Vh/(N + 2) = vm (16) From equations (16) and (9), the voltage of the output capacitor G 匕 and ^ Μ 'the two ends of the two switches & 4 cross-voltage, and the responsibility of the battery's main control The period... is irrelevant, so the highest voltage at both ends of the two open_ is a fixed value.跨 The voltage across the two switches A, & is equal to 匕". The voltage VCI of the first capacitor q is equal to the voltage of the two switches u2, so the highest voltage of the two switches &, & Moved to a fixed value, and is smaller than the output capacitor c". The four switches ^& ϋ 降 降 、 、 、 升压 升压 升压 、 、 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降 降The current enters the next mode. Mode 5 (Time: Ws): Referring to Figure 16, in this mode 5, the second opening & and the fourth switch ❹ 4 continue to conduct, but switch to non-conduction during this mode. Not guiding and shown in Figure 16 in this mode, the current path is 2. When the current L of the first winding is equal to the current f of the second winding, the energy stored in the two windings is released via the fourth switching center to When the capacitor C is turned on, the other switches Α 无 have no current crossing. Mode 6 (Time: 18 201021384 Refer to the diagram switch for non-conduction. When the first switch & is turned on, the first winding, A ^ r is now · The leakage inductance of the heart 4 limits the rising slope of the electric current of the first winding 4, the domain to the ! Dagger winding current takes time to zero, since the two $ 5 ,, the leakage inductance current clamp each other, to be self-Fu zero current switching characteristic, the fourth on the money M & of the base body diode conduction ^

At this time, the current path (4) maintains the pre-mode, but gradually decreases, so the first switch A has a flexible switching characteristic when turned on, effectively reducing the switching loss. Mode seven (time:, 6~(.): / read Figure 18' In this mode, the first switch & continue to conduct and the second switch & switch to conduction during this mode, while the remaining switches are not Turning on. And in Figure 18, the direction of the current path is shown in this mode. When the leakage inductance energy is released, the second winding of the electric "turns and flows into the first switch to discharge the parasitic capacitance of the third switch & Charging with the parasitic capacitance of the fourth switch ^ and clamping each other. When the base body of the third switch & is turned on, the third switch & is turned on, and the voltage across the fourth switch & (12) Heart~ At this time, a switching cycle is completed, and 4 working mode returns to mode. ^ Experimental result: As shown in Fig. 19~23, when the output capacitor C is turned on at a voltage of 4=200V and the battery voltage is Fi=24V, the output is When the power is 500 W, the preferred embodiment of the present invention is the voltage and current waveform of each component of the step-down operation. As shown in Fig. I9, the current waveforms of the windings on both sides are the first winding 19 201021384 group 4 The current h is almost a negative charging current, the second winding The current k of 4 is a bidirectional flow. As shown in Fig. 20, the voltage and current waveform of the first switch & during the synchronous rectification control, the voltage of the first switch & is approximately equal to 50V, which is in accordance with the theoretical analysis. Figure 21 shows the voltage and current waveforms of the second switch & with synchronous rectification and zero voltage switching characteristics, the voltage clamping is the same as the first switch & as shown in Figures 22 and 23, the third switch is respectively shown. & and the fourth switch & ❹ voltage and current waveform, the two switches &, & turn on zero voltage switching characteristics, when the voltage is not on, the voltage clamp is limited to i 5〇v, in line with theoretical calculations. As shown in FIG. 28, when the voltage of the output capacitor is ~=2〇〇v and the voltage of the battery is C=24V, and the output power is 5〇〇w, the voltage of each component in the boosting embodiment of the preferred embodiment of the present invention is Current waveform: As shown in Figure 24, the waveform of the two winding currents, the first winding, the current I is all positive battery discharge current, and the second winding. The current L is bidirectional flow. , for the voltage and current waveform of the first switch & The current waveform is close to the square wave, has a low conduction loss, and has a zero current switching effect, and the voltage of the first switch & the frequency vsl is approximately equal to 50 V. As shown in Fig. 26, the voltage and current waveform of the second switch & With synchronous rectification and zero-electric switching characteristics, the voltage value is the same as that of the first switch & As shown in Fig. 27 and Fig. 28, the voltage and current of the third switch & and the fourth switch 20 201021384 are respectively displayed. The waveform, the one switch χ, & when turned on with zero voltage switching and synchronous rectification characteristics, the voltage clamp is limited to l5 〇 V when not conducting. As shown in Figure 29, the highest buck conversion efficiency is about 95%, and the highest boost conversion efficiency is about 96%. In summary, the preferred embodiment of the present invention has the following advantages: (1) Compared with the conventional bidirectional conversion device (Fig. 1), no additional inductance and multiple diodes are required, so the volume can be reduced. Small to facilitate carrying, and the cost can be reduced.

(1) All switches have the characteristics of ZCS in both boost and buck conditions, and the withstand voltage at both ends of the switch is fixed to the highest voltage of the system' and does not follow the seven-knife change mode and the duty cycle. Change to make the voltage across the switch fully suppressed. (―) The synchronous rectification technology effectively reduces the conduction loss of the switch, and at the same time has a high buck-boost ratio and high conversion efficiency. (4) Strictly dividing the high and low voltages by using the electromagnetic characteristics of the light-emitting circuit to fully utilize the component specifications. The above description is only for the preferred embodiment of the present invention, and can be used to limit the scope of the present invention to the rm ^ ^ implementation of the present invention, that is, the scope of the patent application and the description of the invention within the invention f ~ MA .. The short-term equivalent changes and modifications of the present invention are still within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a conventional 4α _ , bidirectional conversion device; FIG. 2 is a circuit diagram of the present invention; a preferred embodiment of a political energy bidirectional conversion device 21 201021384 FIG. 3 is a preferred embodiment FIG. 4 is a circuit diagram of the buck operation of the preferred embodiment, and FIG. 5 is a circuit diagram of the buck operation of the preferred embodiment, and the operation of the second embodiment; 6 is a circuit diagram of the step-down operation of the preferred embodiment, and the operation of Equation 3; FIG. 7 is a circuit diagram of the step-down operation of the preferred embodiment, and operation of Equation 4; FIG. 8 is the preferred embodiment. FIG. 9 is a circuit diagram of the buck operation of the preferred embodiment, and operation of the sixth embodiment; FIG. 10 is a circuit diagram of the buck operation of the preferred embodiment. Figure 11 is a timing diagram of the boosting operation of the preferred embodiment; Figure 12 is a circuit diagram of the preferred embodiment of the boosting operation; Figure 13 is a preferred embodiment of the boosting operation Pressure. Operation of the circuit diagram 2 operation; Figure 14 is the comparison The preferred embodiment is the operation of the circuit diagram of the boosting operation; 阖15 is the operation of the circuit diagram of the preferred embodiment in the boosting operation; Illustrated in the modulo 'description in the modulo' description in the modulo 'description' in the modulo 'description' in the modulo' description in the modulo 201021384 Figure 16 is a circuit diagram of the preferred embodiment of the boosting operation, illustrating the operation under Equation 5; ° 17 is a circuit diagram of the boosting operation of the preferred embodiment, illustrating operation in mode six; and FIG. 18 is a circuit diagram of the boosting operation of the preferred embodiment, illustrating operation in mode seven; The preferred embodiment is an experimental measurement diagram of the step-down operation, illustrating the current waveforms of the first winding and the second winding; FIG. 20 is an experimental measurement diagram of the step-down operation of the preferred embodiment, illustrating the first switch FIG. 21 is an experimental measurement diagram of the step-down operation of the preferred embodiment, illustrating voltage and current waveforms of the second switch; FIG. 22 is an experimental amount of the step-down operation of the preferred embodiment. Mapping FIG. 23 is an experimental measurement diagram of the step-down operation of the preferred embodiment, illustrating voltage and current waveforms of the fourth switch; FIG. 24 is a boosting operation of the preferred embodiment. The experimental measurement chart illustrates the current waveforms of the first winding and the second winding; FIG. 25 is an experimental measurement diagram of the boosting operation of the preferred embodiment, illustrating the voltage and current waveforms of the first switch; The preferred embodiment is an experimental measurement diagram of the boosting operation, illustrating the voltage and current waveforms of the second switch; FIG. 27 is an experimental measurement diagram of the boosting operation of the preferred embodiment, illustrating the third switch Voltage and current waveforms; 23 201021384 FIG. 28 is an experimental measurement diagram of the boosting operation of the preferred embodiment, illustrating voltage and current waveforms of the fourth switch, and FIG. 29 is an experimental measurement diagram of the preferred embodiment. , indicating conversion efficiency in buck operation and boost operation.

24 201021384 [Main component symbol description]

Tr.....•...

Ch .......output capacitor C1........-first capacitor C!...second capacitor S1 •...first switch 52 ......... The second switch 53 ... the third switch s4 ... ... the fourth switch LP ... ... the first winding Ls. ..second winding

25

Claims (1)

201021384 X. Patent Application Range·· 1. A high-performance two-way conversion device, which is suitable for being disposed between a first energy storage unit and a first storage unit, the high performance bidirectional conversion device comprising: a coupling circuit The first winding and the second winding are included, and the female winding has a first end and a second end, the first end of the first winding is electrically connected to the first energy storage unit, and the first winding The first end is electrically connected to the first end of the second winding; the first switch has a second electrically connected to the first winding a fourth end of the end and a second end of the ground, and switchable between a conducting state and a non-conducting cancer; a second switch having a first end and a second end, switching between states; electrically connecting to the a second winding of the first winding and in a conducting state and a non-conducting-third switch having a first end electrically connected to the second end of the second switch and a second end connected to the second end of the second burning group And switching between a conducting state and a non-conducting state; ❹ - a fourth switch having a first end electrically connected to the second end of the third switch and a second electrically connected to the second energy storage unit And switching between the conductive state and the non-conducting state, the second end of the second switch and the first first capacitor are electrically connected to the first portion; and the first energy storage can be performed by switching the switches The energy of the unit is released to the second energy storage unit or the energy of the second energy storage unit is released to the first energy storage unit. 26 201021384 2. According to the scope of the patent application, where the energy release side...: 丄 two-way conversion device 'Ab « . ^ direction 疋 from the second energy storage unit to the first storage moon 匕 single, the first electricity . Each of the electricity can be charged or placed via the second switch. According to the second aspect of the application, the second aspect of the invention is electrically connected to the second capacitor. Between the first end of the second winding and the second end of the third switch. The high-performance bidirectional conversion device according to Item 3 of the patent application (4), wherein the energy release direction is from the second energy storage unit to the first storage-storage 70 o'clock, the second capacitor is The second energy storage element is charged. 5. According to the high-performance two-way conversion device described in the first paragraph of the patent scope, ^: when the energy release direction is from the second energy storage unit to the first storage, the first switch and the first switch The third switch has the same duty cycle. ❿ 6. According to the shot, please use the high-performance bidirectional conversion device described in item 1, when the energy release direction is from the second energy storage unit to the first storage unit 兀 豸 豸 first switch and the third switch Simultaneously turned on, and the first switch is turned on during the on period of the fourth switch, and when the first switch is turned on, the fourth switch is not turned on. The high-performance two-way conversion device according to the first aspect of the patent application, wherein: when the energy release direction is from the first energy storage unit to the second storage unit b, the first switch and the The fourth switch has the same duty cycle. 27 201021384 8·=申: High-energy bidirectional conversion device according to item 1 of the patent scope... the energy release direction is from the first-staggered energy-early-timed time, the second switch and the fourth switch are the same as the first The storage switch is turned on during the on period of the first switch, and a, 'and the third switch is not turned on when the third switch is turned on. Although the second switch 9. According to the scope of claim i, wherein the first end of the first winding is a pole w, a bidirectional switching device, a half-turn horn polarity end, and ❹: the second end is non-polar a point end, and a second of the second winding: a winding point end, and the second end of the second winding is a non-polar point end. Creep 28