CN115800753A - Multi-port converter and control method thereof - Google Patents

Multi-port converter and control method thereof Download PDF

Info

Publication number
CN115800753A
CN115800753A CN202211320631.2A CN202211320631A CN115800753A CN 115800753 A CN115800753 A CN 115800753A CN 202211320631 A CN202211320631 A CN 202211320631A CN 115800753 A CN115800753 A CN 115800753A
Authority
CN
China
Prior art keywords
switch tube
inductance
current
tube
diode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211320631.2A
Other languages
Chinese (zh)
Inventor
乐卫平
刘涛
乐子毅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen CSL Vacuum Science and Technology Co Ltd
Original Assignee
Shenzhen CSL Vacuum Science and Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen CSL Vacuum Science and Technology Co Ltd filed Critical Shenzhen CSL Vacuum Science and Technology Co Ltd
Priority to CN202211320631.2A priority Critical patent/CN115800753A/en
Publication of CN115800753A publication Critical patent/CN115800753A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The invention relates to the technical field of converters, in particular to a multi-port converter and a control method thereof, wherein the multi-port converter comprises a direct-current power supply, an auxiliary battery pack, a first inductor, a transformer, a switching tube, a first diode, a third diode, a fourth diode and an output module; the transformer comprises a primary winding and a secondary winding; the output module comprises a second capacitor and a load; the switch tube comprises a first switch tube, a third switch tube and a fourth switch tube. The multi-port converter provided by the invention realizes multiple transformation ratios with less switching device quantity.

Description

Multi-port converter and control method thereof
Technical Field
The invention belongs to the technical field of converters, and particularly relates to a multi-port converter and a control method thereof.
Background
In the existing direct current power distribution system, if a new energy power generation system such as a wind power generation system, a photovoltaic power generation system and the like, and an energy storage unit need to be accessed, in order to effectively combine power generation equipment with various equipment in the direct current power distribution system, the purpose can be achieved through a plurality of direct current converters. The multi-port converter can replace a plurality of original discrete direct current converters, effectively reduces the volume weight of the power generation system, improves the power integration level of the system and has lower cost. The prior multi-port converter can be divided into a multi-input single-output type, a single-input multi-output type, a mixed type and a bidirectional type according to the difference of port power flow directions; the converter can be divided into a three-port converter, a four-port converter and the like according to different numbers of contained ports.
Most of the existing multi-port converters are configured in an array mode, and each port needs a switching tube circuit or a bridge control circuit with a specific framework, so that the number of switching devices of the multi-port converters is large. Common unidirectional or bidirectional multi-port converters are mostly configured in an array manner, each port needs a full-bridge or half-bridge control circuit, so that each port needs to be configured with a plurality of switching devices (at least four full-bridges and at least two half-bridges), the more the ports are, the more the switching devices of the converter are, and the energy consumption of the converter is high and the efficiency is low.
Disclosure of Invention
The invention provides a multi-port converter and a control method thereof, aiming at the problem that the existing multi-port converter has more switching devices.
According to a first aspect of the present invention, there is provided a multi-port converter, comprising a dc power supply, an auxiliary battery pack, a first inductor, a transformer, a switching tube, a first diode, a third diode, a fourth diode, and an output module;
the transformer comprises a primary winding and a secondary winding;
the output module comprises a second capacitor and a load;
the switch tube comprises a first switch tube, a third switch tube and a fourth switch tube;
the positive electrode of the direct current power supply is connected with the first end of the third switching tube, the negative electrode of the third diode and the first end of the primary winding;
the cathode of the first diode is connected with the second end of the third switching tube, and the cathode of the fourth diode is connected with the anode of the third diode;
the first end of the first inductor is connected with the second end of the third switching tube, and the second end of the first inductor is connected with the positive electrode of the auxiliary battery pack;
the first end of the first capacitor is connected with the second end of the primary winding, and the second end of the first capacitor is connected with the anode of the third diode;
the first end of the first switching tube is connected with the second end of the primary winding, and the second end of the first switching tube is connected with the first end of the secondary winding and the first end of the fourth switching tube;
the first end of the second capacitor is connected with the second end of the secondary winding, and the load is connected in parallel with the two ends of the second capacitor;
the negative electrode of the direct-current power supply, the negative electrode of the first diode, the negative electrode of the fourth diode, the negative electrode of the auxiliary battery pack, the second end of the fourth switch tube and the second end of the second capacitor are connected with each other.
Optionally, the device further comprises a second diode; the switch tube further comprises a second switch tube; the first end of the second switch tube is connected with the positive electrode of the auxiliary battery pack, the second end of the second switch tube is connected with the positive electrode of the second diode, and the negative electrode of the second diode is connected with the first end of the fourth switch tube.
Optionally, the transformer further includes an excitation inductor and a leakage inductor; the excitation inductor is connected in parallel with two ends of the primary winding, a first end of the leakage inductor is connected with a second end of the primary winding, and a second end of the leakage inductor is connected with a first end of the first switching tube.
Optionally, the switch tube is a field effect tube, and the first end of the switch tube is a drain electrode of the field effect tube; the second end of the switch tube is a source electrode of the field effect tube; the third end of the switch tube is the grid of the field effect tube.
According to a second aspect of the present invention, there is provided a control method of a multi-port converter, comprising the steps of:
generating a first control signal I, a third control signal I and a fourth control signal I; the first control signal I controls the on-off of the first switching tube, the third control signal I controls the on-off of the third switching tube, the fourth control signal I is transmitted to the grid electrode of the fourth switching tube, and the multi-port converter sequentially has the following five working modes in one period:
the first working mode I: the first switching tube is turned off, the third switching tube is turned on, and the fourth switching tube is turned on; the direct current power supply charges the first inductor, the current of the first inductor starts to rise linearly, the energy of the excitation inductor is transmitted to the secondary winding and charges the second capacitor, and the current flowing through the excitation inductor starts to fall;
the second working mode I: the first switching tube is conducted, the third switching tube is turned off, and the fourth switching tube is turned off; the first inductor releases energy to the auxiliary battery pack through the first diode, the current flowing through the first inductor starts to linearly decrease, the direct-current power supply simultaneously charges the excitation inductor and the leakage inductor, the current of the excitation inductor and the current of the leakage inductor respectively linearly increase, and the first capacitor releases energy until the current of the fourth diode is reduced to 0;
the third working mode I: the first switch tube is turned on, the third switch tube is turned off, the fourth switch tube is turned off, the first inductor continuously releases energy to the auxiliary battery pack through the first diode, the current of the first inductor linearly decreases, the direct current power supply continuously charges the excitation inductor and the leakage inductor, and the current of the excitation inductor and the current of the leakage inductor respectively linearly increase;
a fourth working mode I: the first switch tube is turned off, the third switch tube is turned off, the fourth switch tube is turned on, the first inductor continues to release energy to the auxiliary battery pack through the first diode, the current of the first inductor linearly drops, and the energy stored in the leakage inductor is transmitted to the first capacitor until all the energy stored in the leakage inductor is released; the energy stored in the excitation inductor is transmitted to the secondary winding, the second capacitor is charged, and the current of the excitation inductor starts to linearly decrease;
a fifth working mode I: the first switch tube is turned off, the third switch tube is turned off, the fourth switch tube is turned on, the first inductor continuously releases energy to the auxiliary battery pack through the first diode, the current of the first inductor linearly drops, the energy stored in the excitation inductor is transmitted to the secondary winding and charges the second capacitor, and the current of the excitation inductor linearly drops.
According to a third aspect of the present invention, there is provided a control method of a multi-port converter, comprising the steps of:
generating a first control signal II, a second control signal II and a fourth control signal II; the first control signal II controls the on-off of the first switch tube, the second control signal II controls the on-off of the second switch tube, the fourth control signal II is transmitted to the grid electrode of the fourth switch tube, and the multi-port converter sequentially has the following five working modes in one period:
the first working mode II: the first switch tube is switched on, the second switch tube is switched on, the fourth switch tube is switched off, the direct-current power supply charges the excitation inductor and the leakage inductor, the current of the excitation inductor and the current of the leakage inductor rise linearly, and the first capacitor releases energy until the current of the fourth diode is reduced to 0;
a second working mode II: the first switch tube is connected, the second switch tube is connected, the fourth switch tube is disconnected, the direct-current power supply continues to charge the excitation inductor and the leakage inductor, and the current of the excitation inductor and the current of the leakage inductor linearly rise;
a third working mode II: the first switch tube is turned off, the second switch tube is turned on, the fourth switch tube is turned off, the secondary winding of the auxiliary battery pack transmits energy to the primary winding and charges the excitation inductor, the current of the excitation inductor continuously and linearly rises, and the energy of the leakage inductor is transmitted to the first capacitor until the energy of the leakage inductor is completely released;
a fourth working mode II: the first switch tube is turned off, the second switch tube is turned on, the fourth switch tube is turned off, the auxiliary battery pack continuously transmits energy to the primary winding through the secondary winding and charges the excitation inductor, and the current of the excitation inductor continuously and linearly rises;
a fifth working mode II: the first switch tube is turned off, the second switch tube is turned off, the fourth switch tube is turned on, the energy of the excitation inductor is transmitted to the secondary winding and charges the second capacitor, and the current of the excitation inductor is linearly reduced.
According to a fourth aspect of the present invention, there is provided a control method of a multi-port converter, comprising the steps of:
generating a first control signal III and a fourth control signal III; the first control signal III controls the on-off of the first switch tube, the fourth control signal III is transmitted to the grid electrode of the fourth switch tube, and the multi-port converter is enabled to have the following four working modes in sequence in one period:
a first working mode III: the first switch tube is switched on, and the fourth switch tube is switched off; the direct-current power supply charges the excitation inductor and the leakage inductor at the same time, the current of the excitation inductor and the current of the leakage inductor respectively rise linearly, and the first capacitor releases energy until the current of the fourth diode is reduced to 0;
and a second working mode III: the first switch tube is switched on, and the fourth switch tube is switched off; the direct current power supply charges the excitation inductor and the leakage inductor at the same time, and the current of the excitation inductor and the current of the leakage inductor respectively rise linearly;
a third working mode III: the first switch tube is turned off, and the fourth switch tube is turned on; the energy of the leakage inductance is transmitted to the first capacitor, the energy of the excitation inductance is transmitted to the secondary winding, and the second capacitor is charged until the current of the leakage inductance is reduced to zero;
fourth mode of operation iii: the first switch tube is turned off, the fourth switch tube is turned on, the energy of the leakage inductance is completely released, the energy of the excitation inductance is transmitted to the secondary winding, and the second capacitor is continuously charged.
According to a fifth aspect of the present invention, there is provided a control method of a multi-port converter, comprising the steps of:
generating a second control signal IV and a fourth control signal IV; the second control signal IV controls the on-off of the second switch tube, the fourth control signal IV is transmitted to the grid electrode of the fourth switch tube, and the multi-port converter sequentially has the following two working modes in one period:
a first operating mode IV: the second switching tube is switched on, the fourth switching tube is switched off, the auxiliary battery pack transmits energy to the primary winding through the secondary winding and charges the excitation inductor, and the current of the excitation inductor rises linearly;
second operating mode IV: the second switch tube is turned off, the fourth switch tube is turned on, the energy of the excitation inductor is transmitted to the secondary winding, and the second capacitor is charged.
According to a sixth aspect of the present invention, there is provided a control method of a multiport converter, characterized by comprising the steps of:
and generating a third control signal V, wherein the third control signal V controls the on-off of a third switching tube, and the multiport converter has the following two working modes in sequence in one period:
a first working mode V: the third switching tube is conducted, the direct-current power supply respectively provides energy for the first inductor and the auxiliary battery pack, and the current of the first inductor rises linearly;
a second working mode V: and when the third switching tube is turned off, the first inductor releases energy to the auxiliary battery pack through the first diode, and the current of the first inductor linearly decreases.
Has the advantages that:
according to the multi-port converter provided by the invention, the switch tubes are mutually matched, and each port is required to be independently configured with a plurality of switch devices in the non-traditional array configuration, so that the number of the switch devices of the multi-port converter provided by the embodiment can be effectively reduced; the multi-port converter has multiple working modes, realizes multiple transformation ratios and is simple to control.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 shows a schematic diagram of a topology of a multi-port converter provided in this embodiment.
Fig. 2 shows a control strategy diagram of five operation modes of a multi-port converter provided in this embodiment.
Fig. 3 shows an operation diagram of the first operation mode i of the SIDO mode of the multi-port converter provided in this embodiment.
Fig. 4 shows an operation diagram of the second operation mode i of the SIDO mode of the multi-port converter provided in this embodiment.
Fig. 5 shows an operation diagram of a third operation mode i of the SIDO mode of the multi-port converter provided in this embodiment.
Fig. 6 shows an operation diagram of the fourth operation mode i of the SIDO mode of the multi-port converter according to the present embodiment.
Fig. 7 shows an operation diagram of a fifth operation mode i of the SIDO mode of the multi-port converter provided in this embodiment.
Fig. 8 shows an operation schematic diagram of the first operation mode ii of the DISO mode of the multi-port converter provided in this embodiment.
Fig. 9 shows an operation diagram of the second operation mode ii of the DISO mode of the multi-port converter provided in this embodiment.
Fig. 10 shows an operation schematic diagram of a third operation mode ii of a DISO mode of the multi-port converter provided in this embodiment.
Fig. 11 shows an operation schematic diagram of a fourth operation mode ii of a DISO mode of the multi-port converter provided in this embodiment.
Fig. 12 shows an operation schematic diagram of a fifth operation mode ii of the DISO mode of the multi-port converter provided in this embodiment.
Fig. 13 shows an operation diagram of the first operation mode iii of the SISO-i mode of the multi-port converter provided in the present embodiment.
Fig. 14 shows an operation diagram of the second operation mode iii of SISO-i mode of the multi-port converter provided in this embodiment.
Fig. 15 shows an operation diagram of the third operation mode iii of SISO-i mode of the multi-port converter provided in this embodiment.
Fig. 16 shows an operation diagram of the fourth operation mode iii of SISO-i mode of the multi-port converter provided in this embodiment.
Fig. 17 shows an operation diagram of a first operation mode iv of a SISO-ii mode of a multi-port converter provided in this embodiment.
Fig. 18 shows an operation diagram of a second operation mode iv of SISO-ii mode of the multi-port converter provided in the present embodiment.
Fig. 19 shows an operation diagram of the first operation mode v of the multi-port transformer SISO-iii mode provided in this embodiment.
Fig. 20 shows an operation diagram of the second operation mode v of the SISO-iii mode of the multi-port converter provided in the present embodiment.
Fig. 21 is a waveform diagram illustrating the operation of the main devices in one operating cycle of the SIDO mode of the multi-port converter provided in this embodiment.
Fig. 22 is a waveform diagram illustrating the operation of the main devices in one operating cycle of the DISO mode of the multi-port converter provided in this embodiment.
Fig. 23 is a waveform diagram showing the operation of the main devices in one operating cycle of the SISO-i mode of the multi-port converter provided in the present embodiment.
Fig. 24 is a waveform diagram showing the operation of the main devices in one operation cycle of the SISO-ii mode of the multi-port converter provided in the present embodiment.
Fig. 25 is a waveform diagram showing operation waveforms of main devices in one operation period of the SISO-iii mode of the multi-port converter provided in the present embodiment.
Reference numerals are as follows:
V in a direct current power supply;V b an auxiliary battery pack;
D 1 a first diode;D 2 a second diode;D 3 a third diode;D 4 a fourth diode;
S 1 the first switch tube;S 2 the second switch tube;S 3 a third switch tube;S 4 a fourth switching tube;
L p primary winding；L s A secondary winding;L m an excitation inductor;L 1k and leakage inductance;
L 1 the first inductor;
C s the first capacitor;C o a second capacitor;
Rand a load.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
As shown in FIG. 1, a multi-port converter according to the disclosed embodiments of the present invention includes a DC power sourceV in Auxiliary battery packV b First inductanceL 1 Transformer, switch tubeS 1 、S 2 、S 3 、S 4 Diode (D)D 1 、D 2 、D 3 、D 4 And an output module; the output module comprises a second capacitorC o And a loadR(ii) a The transformer comprises a primary windingL p Secondary windingL s Excitation inductorL m And the sense of leakageL 1k 。
Direct current power supplyV in Positive electrode and third switch tubeS 3 First terminal, third diodeD 3 Negative pole, primary winding ofL p Is connected; first diodeD 1 Negative electrode and third switching tubeS 3 Is connected to the second terminal of the fourth diodeD 4 Cathode and third diodeD 3 The positive electrode of (2) is connected; first inductorL 1 First end and third switch tubeS 3 Is connected to the second terminal of the first inductorL 1 Second terminal and auxiliary battery packV b Is connected to the positive electrode.
Primary windingL p Second terminal and leakage inductance ofL 1k Is connected with the first end of the exciting inductorL m Connected in parallel to the primary windingL p Two ends of (a); first capacitorC s Is a polar capacitor, a first capacitorC s Cathode and third diodeD 3 Is connected to the positive electrode of the first capacitorC s Positive electrode and leakage inductance ofL 1k Is connected with the second end of the first end; leakage inductanceL 1k First end and first switch tubeS 1 Is connected to the first end of the first housing.
Auxiliary battery packV b Anode and second switch tubeS 2 Is connected with the first end of the second switch tubeS 2 Second terminal and second diodeD 2 Is connected to the anode of a second diodeD 2 Negative pole and first switch tubeS 1 Second end, fourth switch tubeS 4 Is connected to the first end of the first housing.
First diodeD 1 Negative electrode of (1), fourth diodeD 4 Negative electrode of (1), auxiliary battery packV b Negative pole and fourth switch tubeS 4 Second terminal and DC power supplyV in Is connected to the negative electrode of (1).
Secondary windingL s First end and first switch tubeS 1 Is connected to the second terminal of, and is secondaryWinding wireL s Second terminal and second capacitorC o Is connected to a second capacitorC o Second terminal and DC power supplyV in The negative electrode of (1) is connected; load(s)RConnected in parallel to the second capacitorC o Two ends.
Primary windingL p First terminal and secondary winding ofL s The first ends of the first and second terminals are homonymous ends; switch tubeS 1 、S 2 、S 3 、S 4 Is a field effect transistor, a switching tubeS 1 、S 2 、S 3 、S 4 The first end of the first switch is the drain electrode of the field effect transistorS 1 、S 2 、S 3 、S 4 The second end of the first diode is a source electrode of a field effect transistor and a switching tubeS 1 、S 2 、S 3 、S 4 The third end of the second transistor is a grid electrode of the field effect transistor.
The multi-port converter provided in this embodiment has five operation modes, specifically including a single-input double-output (SIDO) mode, a double-input single-output (DISO) mode, a single-input single-output (SISO) mode, and a single-input single-output (SISO) mode, where the SISO mode includes a SISO-i mode, a SISO-ii mode, and a SISO-iii mode; direct current power supplyV in Input power at both ends isP in Auxiliary battery packV b Power at both ends isP b Load, loadROutput power at both ends ofP o The control strategies of the five working modes, that is, the power flow relationship corresponding to the working modes and the main control switch are shown in fig. 2.
In the SIDO mode, the first switch tubeS 1 And a third switching tubeS 3 Is a master control switch, a fourth switch tubeS 4 Following firstSwitch tubeS 1 Passive on-off; first switch tubeS 1 When conducting, the fourth switch tubeS 4 Cutting off; first switch tubeS 1 When the switch is turned off, the fourth switch tubeS 4 Conducting; second switch tubeS 2 Does not participate in the operation of this mode.
In the SIDO mode, the power flow relationship is
Figure 399609DEST_PATH_IMAGE001
(ii) a The SIDO mode sequentially comprises the following five working modes in one working cycle:
referring to fig. 3, the first mode of operation i: first switch tubeS 1 Turn-off and third switch tubeS 3 Conducting and fourth switch tubeS 4 Conducting; direct current power supplyV in For the first inductorL 1 Charging, first inductanceL 1 The current of (2) starts to rise linearly, the excitation inductanceL m To the secondary windingL s And to the second capacitorC o Charging, current-through exciting inductanceL m Begins to drop.
Referring to fig. 4, the second mode of operation i: first switch tubeS 1 Conducting and third switching tubeS 3 Turn-off and fourth switch tubeS 4 Turning off; first inductorL 1 Through a first diodeD 1 Releasing energy to an auxiliary battery packV b Flows through the first inductorL 1 The current of (1) starts to drop linearly, the direct current power supplyV in Inductance for simultaneous excitationL m And leakage inductanceL 1k Charging and exciting inductorL m Current and leakage inductance ofL 1k Respectively, of the current of the first capacitorC s Release energy until the fourth diodeD 4 Current of (2)And decreases to 0.
Referring to fig. 5, the third operating mode i: first switch tubeS 1 Conducting, third switch tubeS 3 Turn-off, fourth switch tubeS 4 Turn off, first inductanceL 1 Through the first diodeD 1 Continue to release energy to the auxiliary batteryV b First inductanceL 1 Current of (2) is linearly decreased, direct current power supplyV in Continue to supply excitation inductanceL m And the sense of leakageL 1k Charging and exciting inductorL m Current and leakage inductance ofL 1k Respectively, rises linearly.
Referring to fig. 6, the fourth mode of operation i: first switch tubeS 1 Turn-off, third switch tubeS 3 Turn-off, fourth switching tubeS 4 Conducting the first inductorL 1 Through a first diodeD 1 Continue to release energy to the auxiliary batteryV b First inductanceL 1 Current of (2) is linearly decreased and stored in a leakage inductanceL 1k To the first capacitorC s Until it is stored in the leakage inductanceL 1k The energy of (2) is released completely; stored in exciting inductanceL m To the secondary windingL s And to the second capacitorC o Charging and exciting inductorL m Begins to drop linearly.
Referring to fig. 7, a fifth operating mode i: first switch tubeS 1 Turn-off, third switch tubeS 3 Turn-off, fourth switch tubeS 4 Conducting the first inductorL 1 Through a first diodeD 1 Continuing to release energy to the auxiliary battery packV b First inductanceL 1 Is linearly decreased and stored in the exciting inductanceL m To the secondary windingL s And to the second capacitorC o Charging and exciting inductorL m The current of (2) decreases linearly.
The first known inductorL 1 Excitation inductorL m In the SIDO mode, the voltage of five working modes can be obtained according to the "volt-second balance" principle of the inductor, so that the steady-state voltage gain in the working mode can be obtained:
Figure 37788DEST_PATH_IMAGE002
in the formula (I), the compound is shown in the specification,M1for loads in SIDO modeROutput voltage at two ends and DC power supplyV in The voltage gain of the input voltage across it,V in as a direct current power supplyV in The input voltage at the two ends of the capacitor,Vois a loadRThe output voltage at the two ends of the capacitor,D1is a first switch tubeS 1 N is the turns ratio of the transformer;M2for auxiliary batteries in SIDO modeV b Voltage at two ends and DC power supplyV in The voltage gain of the input voltage across it,Vbfor assisting battery packsV b The input voltage at the two ends of the input,D3is a third switch tubeS 3 The duty cycle of (c).
In the SIDO mode, the operating waveforms of the main devices during one operating cycle are shown in fig. 21,i Lm for exciting inductanceL m The current of (a) is measured,V L1k is a leakage inductanceL 1k The voltage of (a) is set to be,i L1 is a first inductorL 1 The current of (2) is measured by the sensor,T S for the time of the next duty cycle in the SIDO mode,t 0 、t 1 、t 2 、t 3 、t 4 respectively corresponding to a first working mode I, a second working mode I and a third working modeThe working mode I, the fourth working mode I and the fifth working mode I are started,t 5 the moment corresponding to the beginning of the first working mode I of the next working cycle.
In DISO mode, the first switch tubeS 1 And a second switch tubeS 2 Is a master control switch, a fourth switch tubeS 4 Following the second switch tubeS 2 Passive on-off; second switch tubeS 2 When conducting, the fourth switch tubeS 4 Cutting off; second switch tubeS 2 When the switch is turned off, the fourth switch tubeS 4 Conducting; third switch tubeS 3 Does not participate in the operation of this mode.
In DISO mode, the power flow relationship is
Figure 630575DEST_PATH_IMAGE003
(ii) a The DISO mode comprises the following five working modes in sequence in one working cycle:
referring to fig. 8, the first mode of operation ii: first switch tubeS 1 Conducting, second switch tubeS 2 Conducting, fourth switch tubeS 4 Turn-off, direct current power supplyV in Excitation supply inductanceL m And leakage inductanceL 1k Charging and exciting inductorL m Current and leakage inductance ofL 1k The current of (1) rises linearly, the first capacitanceC s Release energy until the fourth diodeD 4 Is reduced to 0.
Referring to fig. 9, the second operation mode ii: first switch tubeS 1 Conducting, second switch tubeS 2 Conducting, fourth switch tubeS 4 Off, DC power supplyV in Continue to give excitation inductanceL m And the sense of leakageL 1k Charging and exciting inductorL m Current and leakage inductance ofL 1k The current of (2) rises linearly.
Referring to fig. 10, the third operating mode ii: first switch tubeS 1 Turn-off, second switch tubeS 2 Conducting, fourth switch tubeS 4 Turn-off, auxiliary battery packV b Secondary windingL s Transferring energy to a primary windingL p And to excitation inductanceL m Charging and exciting inductorL m Current continues to rise linearly, leakage inductanceL 1k To the first capacitorC s Up to leakage inductanceL 1k The energy of (2) is released completely.
Referring to fig. 11, the fourth operating mode ii: first switch tubeS 1 Turn-off, second switch tubeS 2 Conducting, fourth switch tubeS 4 Turn-off, auxiliary battery packV b By means of secondary windingsL s Continuing the energy transfer to the primary windingL p And supply excitation inductanceL m Charging and exciting inductorL m Continues to rise linearly.
Referring to fig. 12, the fifth mode of operation ii: first switch tubeS 1 Turn-off, second switch tubeS 2 Turn-off, fourth switch tubeS 4 Conducting and exciting inductorL m To the secondary windingL s And to the second capacitorC o Charging and exciting inductorL m The current of (2) decreases linearly.
Known magnetizing inductanceL m The voltage in the DISO mode in five modes can be obtained according to the principle of 'volt-second balance' of the inductor, and the expression of the output voltage and the input voltage in the working mode can be obtained:
Figure 494625DEST_PATH_IMAGE004
in the formula (I), the compound is shown in the specification,Vinas a direct current power supplyV in The input voltage at the two ends of the capacitor,Vois a loadRThe output voltage at the two ends of the capacitor,D1is a first switch tubeS 1 The duty cycle of (a) is,D2is a second switch tubeS 2 The duty cycle of (a) is,D3is a third switch tubeS 3 N is the turns ratio of the transformer;Vbfor assisting battery packsV b The voltage across the terminals.
In the DISO mode, the operating waveforms of the main devices during one operating cycle are shown in fig. 22,i m for exciting inductanceL m The current of (a) is measured,i L1k is a leakage inductanceL 1k The current of (a) is measured,V Lm for exciting inductanceL m The voltage of (a) is set to be,T S for the time of the next duty cycle in the DISO mode,t 0 、t 1 、t 2 、t 3 、t 4 respectively corresponding to the corresponding moments when a first working mode II, a second working mode II, a third working mode II, a fourth working mode II and a fifth working mode II start,t 5 the moment corresponding to the beginning of the first working mode II of the next working cycle.V Lm The voltage of the first working mode II and the second working mode II is
Figure 540290DEST_PATH_IMAGE005
；V Lm The voltage in the third working mode II and the fourth working mode II is equal to
Figure 379064DEST_PATH_IMAGE006
；V Lm In a fifth operating mode II, the voltage level is
Figure 849360DEST_PATH_IMAGE007
。
In SISO-I mode, the first switch tubeS 1 Is a master control switch, a fourth switch tubeS 4 Following the first switch tubeS 1 Passively switching on and off; first switch tubeS 1 When conducting, the fourth switch tubeS 4 Cutting off; first switch tubeS 1 When the switch is turned off, the fourth switch tubeS 4 Conducting; second switch tubeS 2 The third switch tubeS 3 Does not participate in the operation of this mode.
In SISO-I mode, the power flow relationship is
Figure 251523DEST_PATH_IMAGE008
(ii) a The SISO-I mode comprises the following four working modes in sequence in one working cycle:
referring to fig. 13, the first mode of operation iii: first switch tubeS 1 Conducting, fourth switch tubeS 4 Turning off; direct current power supplyV in Simultaneous pair excitation inductanceL m And the sense of leakageL 1k Charging and exciting inductorL m Current and leakage inductance ofL 1k Respectively, the current of the first capacitor rises linearlyC s Release energy until the fourth diodeD 4 Decreases to 0.
Referring to fig. 14, the second mode of operation iii: first switch tubeS 1 Conducting, fourth switch tubeS 4 Turning off; direct current power supplyV in Simultaneous pair excitation inductanceL m And the sense of leakageL 1k Charging and exciting inductorL m Current and leakage inductance ofL 1k Respectively, rises linearly.
Referring to fig. 15, the third operating mode iii: first switch tubeS 1 Turn-off, fourth switch tubeS 4 Conducting; leakage inductanceL 1k To the first capacitorC s Excitation inductanceL m To the secondary windingL s And to the second capacitorC o Charging until leakage inductanceL 1k The current of (c) drops to zero.
Referring to fig. 16, the fourth operating mode iii: first switch tubeS 1 Turn-off, fourth switch tubeS 4 Conduction and leakage inductanceL 1k The energy of (2) is totally released, and the inductance is excitedL m To the secondary windingL s And continue to the second capacitorC o And (6) charging.
Known magnetizing inductanceL m Under the voltage of four working modes in the SISO-I mode, according to the 'volt-second balance' principle of an inductor, the steady-state voltage gain under the working mode can be obtained:
Figure 123664DEST_PATH_IMAGE009
in the formula (I), the compound is shown in the specification,M SISO-Ⅰ for loads in SISO-I modeROutput voltage at two ends and DC power supplyV in The voltage gain of the input voltage across it,Vinas a direct current power supplyV in The input voltage at the two ends of the input,Vois a loadRThe output voltage at the two ends of the capacitor,D1is a first switch tubeS 1 N is the turns ratio of the transformer.
The operating waveforms of the main devices in SISO-i mode during one operating cycle are shown in fig. 23, where in fig. 23,i m for exciting inductanceL m The current of (2) is measured by the sensor,i L1k is a leakage inductanceL 1k The current of (2) is measured by the sensor,V Lm for exciting inductanceL m The voltage of (a) is set to be,T S for the time of one duty cycle in SISO-i mode,t 0 、t 1 、t 2 、t 3 respectively corresponding to the corresponding moments when a first working mode III, a second working mode III, a third working mode III and a fourth working mode III start in a working period,t 4 the corresponding moment when the first working mode III of the next working cycle starts.V Lm The voltage in the first working mode III and the second working mode III is
Figure 320290DEST_PATH_IMAGE010
；V Lm The voltage in the third working mode III and the fourth working mode III is equal to
Figure 277881DEST_PATH_IMAGE011
. In SISO-II mode, the second switch tubeS 2 Is a master control switch, a fourth switch tubeS 4 Following the second switch tubeS 2 Passively switching on and off; second switch tubeS 2 When conducting, the fourth switch tubeS 4 Cutting off; second switch tubeS 2 When the switch is turned off, the fourth switch tubeS 4 Conducting; first switch tubeS 1 The third switch tubeS 3 Does not participate in the operation of this mode.
In SISO-II mode, the power flow relationship is
Figure 218156DEST_PATH_IMAGE012
(ii) a The SISO-II mode comprises the following two working modes in sequence in one working cycle:
referring to fig. 17, the first operating mode iv: second switch tubeS 2 Conducting, fourth switch tubeS 4 Turn-off, auxiliary battery packV b By means of secondary windingsL s Transferring energy to a primary windingL p And to excitation inductanceL m Charging and exciting inductorL m The current of (2) rises linearly.
Referring to FIG. 18, secondAnd working mode IV: second switch tubeS 2 Turn-off, fourth switch tubeS 4 Conducting and exciting inductorL m To the secondary windingL s And to the second capacitorC o And (6) charging.
Known magnetizing inductanceL m Under the SISO-II mode, the voltage of two modes can be obtained according to the 'volt-second balance' principle of the inductor, and the steady-state voltage gain under the working mode can be obtained:
Figure 944803DEST_PATH_IMAGE013
in the formula (I), the compound is shown in the specification,M SISO-Ⅱ for loads in SISO-II modeROutput voltage at two ends and auxiliary battery packV b The gain ratio of the voltages across the two terminals,Vinas a direct current power supplyV in The input voltage at the two ends of the input,Vbfor assisting the batteryV b The voltage across the two terminals is such that,D2is a second switch tubeS 2 N is the turns ratio of the transformer.
The operating waveforms of the main devices in SISO-ii mode during one operating cycle are shown in fig. 24, where in fig. 24,i Lm for exciting the inductanceL m The current of (2) is measured by the sensor,V Lm for exciting inductanceL m The voltage of (a) is set to be,T S is the time of one duty cycle and,t 0 、t 1 respectively corresponding to the corresponding moments when a first working mode IV and a second working mode IV start in a working period,t 2 which is the corresponding moment at the beginning of the first operating mode iv of the next operating cycle.V Lm The voltage in the first working mode IV is
Figure 577910DEST_PATH_IMAGE014
，V Lm The voltage in the second working mode IV is
Figure 22798DEST_PATH_IMAGE015
. Third switch tube under SISO-III modeS 3 A first switch tube as a main control switchS 1 A second switch tubeS 2 And a fourth switching tubeS 4 Does not participate in the operation of this mode.
In SISO-III mode, the power flow relationship is
Figure 501184DEST_PATH_IMAGE016
(ii) a The SISO-III mode comprises the following two working modes in sequence in one working cycle:
referring to fig. 19, the first mode of operation v: third switch tubeS 3 Conducting, DC power supplyV in Respectively to the first inductorsL 1 And an auxiliary battery packV b Providing energy, first inductanceL 1 The current of (2) rises linearly.
Referring to fig. 20, the second mode of operation v: third switch tubeS 3 Turn off, first inductanceL 1 Through a first diodeD 1 To auxiliary battery packV b Releasing energy, first inductanceL 1 The current of (2) decreases linearly.
The first known inductorL 1 Under SISO-III mode, the voltage of two modes can obtain the steady state voltage gain under the working mode according to the 'volt-second balance' principle of the inductor:
Figure 347917DEST_PATH_IMAGE017
in the formula (I), the compound is shown in the specification,M SISO-Ⅲ for auxiliary batteries in SISO-III modeV b Voltage and dc power supply at both endsV in The voltage gain of the input voltage across it,D3is a third switching tubeS 3 Duty ratio ofAnd (4) the ratio.
In SISO-iii mode, the operating waveforms of the main devices during one operating cycle are shown in fig. 25, where in fig. 25,i L1 is a first inductorL 1 The current of (a) is measured,V L1 is a first inductorL 1 The voltage of (a) is set to be,T S for the time of one duty cycle in SISO-iii mode,t 0 、t 1 respectively corresponding to the corresponding moments when the first working mode V and the second working mode V start,t 2 the corresponding time instant at the beginning of the first mode of operation v of the next operating cycle.V L1 In the first operating mode V, the voltage is
Figure 886346DEST_PATH_IMAGE018
，V L1 In the second operating mode V, the voltage is
Figure 818529DEST_PATH_IMAGE019
。
The multi-port converter provided by the embodiment is arranged corresponding to three ports, five working modes are realized by utilizing four switching tubes, the four switching tubes are mutually matched, and each port in the non-traditional array configuration needs to be independently configured with a plurality of switching devices, so that the number of the switching devices of the multi-port converter provided by the embodiment can be effectively reduced, the energy consumption of the multi-port converter is reduced, and the efficiency of the multi-port converter is improved; the five working modes comprise a SISO mode, a DISO mode and an SIDO mode, wherein the SISO mode has three types, and the corresponding mode can be selected for use according to actual requirements; the control mode of the multiport converter is simple, and various transformation ratios can be realized.
Example 2
The first control method of the multi-port converter provided by the embodiment of the invention comprises the following steps:
generating a first control signal I, a third control signal I and a fourth control signal I;
first control signal I controls a first switch tubeS 1 On/off of the first switch tube, and a third control signal I controls a third switch tubeS 3 On-off of the fourth control signal I, the fourth control signal I is transmitted to the fourth switch tubeS 4 Grid electrode of, fourth switching tubeS 4 Along with first switch tubeS 1 Passively switching on and off;
the first control signal I, the third control signal I and the fourth control signal I enable the multi-port converter to work in an SIDO mode, and the SIDO mode sequentially has the following five working modes in one period:
referring to fig. 3, the first operating mode i: first switch tubeS 1 Turn-off and third switch tubeS 3 Conducting and fourth switch tubeS 4 Conducting; direct current power supplyV in For the first inductorL 1 Charging, first inductanceL 1 The current of (2) starts to rise linearly, the excitation inductanceL m To the secondary windingL s And to the second capacitorC o Charging, current-through exciting inductanceL m The current begins to drop.
Referring to fig. 4, the second mode of operation i: first switch tubeS 1 Conducting and third switching tubeS 3 Turn-off and fourth switch tubeS 4 Turning off; first inductorL 1 Through a first diodeD 1 Releasing energy to an auxiliary battery packV b Flows through the first inductorL 1 Start to drop linearly, DC power supplyV in Inductance for simultaneous excitationL m And leakage inductanceL 1k Charging and exciting inductanceL m Current and leakage inductance ofL 1k Respectively, of the current of the first capacitorC s Release energy until the fourth diodeD 4 Decreases to 0.
Referring to fig. 5, the third operating mode i: first switch tubeS 1 Conducting, third switch tubeS 3 Turn-off, fourth switch tubeS 4 Turn off, first inductanceL 1 Through a first diodeD 1 Continuing to release energy to the auxiliary battery packV b First inductanceL 1 Current of (2) is linearly decreased, direct current power supplyV in Continue to give excitation inductanceL m And the sense of leakageL 1k Charging and exciting inductorL m Current and leakage inductance ofL 1k Respectively, rises linearly.
Referring to fig. 6, a fourth operating mode i: first switch tubeS 1 Turn-off, third switch tubeS 3 Turn-off, fourth switching tubeS 4 Conducting the first inductorL 1 Through a first diodeD 1 Continuing to release energy to the auxiliary battery packV b First inductanceL 1 The current of (2) is linearly decreased and stored in the leakage inductanceL 1k To the first capacitorC s Up to storage in leakage inductanceL 1k The energy of (2) is released completely; stored in exciting inductanceL m To the secondary windingL s And to the second capacitorC o Charging and exciting inductorL m Begins to drop linearly.
Referring to fig. 7, a fifth mode of operation i: first switch tubeS 1 Turn-off, third switch tubeS 3 Turn-off, fourth switch tubeS 4 Conducting the first inductorL 1 Through the first diodeD 1 Continue to release energy to auxiliary batteryV b First inductanceL 1 Is linearly decreased and stored in the exciting inductanceL m To the secondary windingL s And supplying a second capacitorC o Charging and exciting inductorL m The current of (2) decreases linearly.
In the SIDO mode, the operating waveforms of the main devices during one operating cycle are shown in fig. 21,i Lm for exciting inductanceL m The current of (a) is measured,V L1k is a leakage inductanceL 1k The voltage of (a) is set to be,i L1 is a first inductorL 1 The current of (2) is measured by the sensor,T S for the time of the next duty cycle in the SIDO mode,t 0 、t 1 、t 2 、t 3 、t 4 respectively corresponding to the corresponding moments when a first working mode I, a second working mode I, a third working mode I, a fourth working mode I and a fifth working mode I start,t 5 the moment corresponding to the beginning of the first working mode I of the next working cycle.
Example 3
The second control method for a multi-port converter provided by the embodiment of the disclosure of the invention comprises the following steps:
generating a first control signal II, a second control signal II and a fourth control signal II; the first control signal II controls the first switch tubeS 1 On/off of the first switch tube, the second control signal II controls the second switch tubeS 2 On/off of the fourth control signal II, and the fourth control signal II is transmitted to the fourth switching tubeS 4 Grid electrode of, fourth switching tubeS 4 Following the second switch tubeS 2 Passively switching on and off;
the first control signal II, the second control signal II and the fourth control signal II enable the multi-port converter to work in a DISO mode, and the DISO mode sequentially has the following five working modes in one period:
referring to fig. 8, the first mode of operation ii: first switch tubeS 1 Conducting, second switch tubeS 2 Conducting, fourth switch tubeS 4 Off, DC power supplyV in Excitation supply inductanceL m And leakage inductanceL 1k Charging and exciting inductorL m Current and leakage inductance ofL 1k The current of (2) rises linearly, the first capacitanceC s Release energy until the fourth diodeD 4 The current of (2) is reduced to 0.
Referring to fig. 9, the second mode of operation ii: first switch tubeS 1 Conducting, second switch tubeS 2 Conducting, fourth switch tubeS 4 Turn-off, direct current power supplyV in Continue to give excitation inductanceL m And the sense of leakageL 1k Charging and exciting inductorL m Current and leakage inductance ofL 1k The current of (2) rises linearly.
Referring to fig. 10, the third operating mode ii: first switch tubeS 1 Turn-off, second switch tubeS 2 Conducting, fourth switch tubeS 4 Turn-off, auxiliary battery packV b Secondary windingL s Transferring energy to a primary windingL p And to excitation inductanceL m Charging and exciting inductorL m Current of (2) continuously rises linearly, leakage inductanceL 1k To the first capacitorC s Up to leakage inductanceL 1k The energy of (2) is released completely.
Referring to fig. 11, the fourth operating mode ii: first switch tubeS 1 Turn-off, second switch tubeS 2 Conducting, fourth switch tubeS 4 Turn-off, auxiliary battery packV b By means of secondary windingsL s Continuing to transfer energy to the primary windingL p And supply excitation inductanceL m Charging and exciting inductorL m Continues to rise linearly.
Referring to fig. 12, the fifth mode of operation ii:first switch tubeS 1 Turn-off, second switch tubeS 2 Turn-off, fourth switch tubeS 4 Conducting and exciting inductorL m To the secondary windingL s And to the second capacitorC o Charging and exciting inductorL m The current of (2) decreases linearly.
In the DISO mode, the operating waveform of the main device in one operating cycle is shown in fig. 22,i m for exciting inductanceL m The current of (a) is measured,i L1k is a leakage inductanceL 1k The current of (2) is measured by the sensor,V Lm for exciting inductanceL m The voltage of (a) is set to be,T S for the time of the next duty cycle in the DISO mode,t 0 、t 1 、t 2 、t 3 、t 4 respectively corresponding to the corresponding moments when the first working mode II, the second working mode II, the third working mode II, the fourth working mode II and the fifth working mode II start,t 5 the moment corresponding to the beginning of the first working mode II of the next working cycle.
Example 4
The third control method of the multi-port converter provided by the embodiment of the disclosure of the invention comprises the following steps:
generating a first control signal III and a fourth control signal III; the first control signal III controls a first switch tubeS 1 On/off of the fourth control signal III, and transmitting the fourth control signal III to the fourth switching tubeS 4 Grid electrode of, fourth switching tubeS 4 Along with first switch tubeS 1 Passively switching on and off; first switch tubeS 1 When conducting, the fourth switch tubeS 4 Cutting off; first switch tubeS 1 When the switch is turned off, the fourth switch tubeS 4 Conducting;
the first control signal III and the fourth control signal III enable the multi-port converter to sequentially have the following four working modes in one period:
referring to fig. 13, the first operating mode iii: first switch tubeS 1 Conducting, fourth switch tubeS 4 Turning off; direct current power supplyV in Simultaneous pair excitation inductanceL m And the sense of leakageL 1k Charging and exciting inductorL m Current and leakage inductance ofL 1k Respectively, the current of the first capacitor rises linearlyC s Release energy until the fourth diodeD 4 Decreases to 0.
Referring to fig. 14, the second mode of operation iii: first switch tubeS 1 Conducting, fourth switching tubeS 4 Turning off; direct current power supplyV in Simultaneous pair excitation inductanceL m And the sense of leakageL 1k Charging and exciting inductorL m Current and leakage inductance ofL 1k Respectively, rises linearly.
Referring to fig. 15, the third operating mode iii: first switch tubeS 1 Turn-off, fourth switching tubeS 4 Conducting; leakage inductanceL 1k To the first capacitorC s Excitation inductanceL m To the secondary windingL s And to the second capacitorC o Charging until leakage inductanceL 1k The current of (c) drops to zero.
Referring to fig. 16, the fourth operating mode iii: first switch tubeS 1 Turn-off, fourth switching tubeS 4 Conduction and leakage inductanceL 1k All the energy of (2) is released, and the inductance is excitedL m To the secondary windingL s And continue to the second capacitorC o And (6) charging.
In SISO-I mode, the working waveform of the main device in one working periodAs shown in fig. 23,i m for exciting inductanceL m The current of (a) is measured,i L1k is a leakage inductanceL 1k The current of (2) is measured by the sensor,V Lm for exciting the inductanceL m The voltage of (a) is set to be,T S for the time of one duty cycle in SISO-i mode,t 0 、t 1 、t 2 、t 3 respectively corresponding to the corresponding moments when a first working mode III, a second working mode III, a third working mode III and a fourth working mode III start in a working period,t 4 the corresponding moment when the first working mode III of the next working cycle starts.
Example 5
The fourth control method for a multi-port converter provided in the embodiments of the present disclosure includes the following steps:
generating a second control signal IV and a fourth control signal IV; the second control signal IV controls a second switch tubeS 2 Make-and-break; a fourth control signal IV is transmitted to a fourth switching tubeS 4 Grid electrode of, fourth switching tubeS 4 Following the second switch tubeS 2 Passive on-off, second switching tubeS 2 When conducting, the fourth switch tubeS 4 Cutting off; second switch tubeS 2 When the switch is turned off, the fourth switch tubeS 4 Conducting;
and the multi-port converter has the following two working modes in sequence in one period:
referring to fig. 17, the first operating mode iv: second switch tubeS 2 Conducting, fourth switch tubeS 4 Turn-off, auxiliary battery packV b By means of secondary windingsL s Transferring energy to a primary windingL p And to excitation inductanceL m Charging and exciting inductorL m The current of (2) rises linearly.
Referring to fig. 18, the second mode of operation iv: second switch tubeS 2 Turn-off, fourth switching tubeS 4 Conducting and exciting inductorL m To the secondary windingL s And to the second capacitorC o And (6) charging.
The operating waveforms of the main devices in SISO-ii mode during one operating cycle are shown in fig. 24, where in fig. 24,i Lm for exciting inductanceL m The current of (a) is measured,V Lm for exciting the inductanceL m The voltage of (a) is set to be,T S for the time of one duty cycle in SISO-ii mode,t 0 、t 1 respectively corresponding to the corresponding moments when the first working mode IV and the second working mode IV start in a working period,t 2 is the corresponding moment when the first working mode IV of the next working cycle starts.
Example 6
The fifth control method for a multi-port converter provided by the embodiment of the disclosure of the invention includes the following steps:
generating a third control signal V for controlling a third switching tubeS 3 Make and break, and make the multiport converter have following two kinds of working modes in a cycle in proper order:
referring to fig. 19, the first mode of operation v: third switch tubeS 3 Conducting, DC power supplyV in Respectively to the first inductorsL 1 And an auxiliary battery packV b Providing energy, first inductanceL 1 The current of (2) rises linearly.
Referring to fig. 20, the second mode of operation v: third switch tubeS 3 Turn off, first inductanceL 1 Through a first diodeD 1 To auxiliary battery packV b Releasing energy, first inductanceL 1 The current of (2) decreases linearly.
In SISO-iii mode, the operating waveforms of the main devices during one operating cycle are shown in fig. 25, where in fig. 25,i L1 is a first inductorL 1 The current of (a) is measured,V L1 is a first inductorL 1 The voltage of (a) is set to be,T S for the time of one duty cycle in SISO-iii mode,t 0 、t 1 respectively corresponding to the corresponding moments when the first working mode V and the second working mode V start,t 2 the moment corresponding to the beginning of the first operating mode v of the next operating cycle.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (9)

1. A multi-port converter comprising a DC power supply (C:)V in ) Auxiliary battery pack (a)V b ) A first inductor (L 1 ) Transformer, switch tube, first diode(s) ((D 1 ) A third diode (c)D 3 ) A fourth diode (c)D 4 ) And an output module;
the transformer comprises a primary winding (L p ) And a secondary winding (L s ）；
The output module comprises a second capacitor (C o ) And a load (R）；
The switch tube comprises a first switch tube (S 1 ) A third switch tube (a)S 3 ) And a fourth switching tube (S 4 ）；
DC power supply (V in ) The positive electrode and the third switching tube (S 3 ) First terminal of (1), third diodeD 3 ) Negative pole, primary winding of (a)L p ) Is connected with the first end of the first connecting pipe;
a first diode (D 1 ) The negative electrode and the third switching tube (S 3 ) Second terminal of (2), a fourth diode (c)D 4 ) Negative electrode of (1) and a third diodeD 3 ) The positive electrode of (1) is connected;
first inductor (L 1 ) The first end and the third switch tube (S 3 ) Is connected to the second terminal of (a) the first inductor (a)L 1 ) The second terminal of (a) and an auxiliary battery packV b ) The positive electrode of (2) is connected;
a first capacitor (C s ) First end of and primary winding (L p ) Is connected to the second terminal of the first capacitorC s ) Second terminal and third diode (D 3 ) The positive electrode of (2) is connected;
first switch tube (S 1 ) First end of and primary winding (L p ) Is connected with the second end of the first switch tube (a)S 1 ) Second terminal and secondary winding (L s ) The first end and the fourth switching tube (S 4 ) Is connected with the first end of the first connecting pipe;
second capacitor (a)C o ) First end and secondary winding of (L s ) To the second terminal of (2), a loadR) Connected in parallel to a second capacitor (C o ) Both ends of (a);
DC power supply (C)V in ) Cathode, first diode (a)D 1 ) Negative electrode of (1), fourth diodeD 4 ) Negative electrode of (1), auxiliary battery packV b ) Negative electrode, fourth switching tube: (S 4 ) Second terminal and second capacitance: (C o ) Are connected to each other.
2. The multi-port converter according to claim 1, further comprising a second diode(s) (ii)D 2 ) (ii) a The switch tube also comprises a second switch tube (S 2 ) (ii) a A second switch tube (S 2 ) The first terminal and the auxiliary battery pack (V b ) The positive electrode of (a) a second switching tube (a)S 2 ) Second terminal and second diode (D 2 ) Is connected to the anode of a second diode (a)D 2 ) (iii) a negative electrode and a fourth switching tubeS 4 ) Is connected to the first end of the first housing.
3. The multiport converter according to claim 2, characterized in that the transformer further comprises an excitation inductance (C:)L m ) And the feelings of leakage: (L 1k ) (ii) a The excitation inductance (L m ) In parallel with the primary winding (L p ) Both ends of (b), the leakage inductance (b)L 1k ) First end of and primary winding (L p ) Is connected to the second end of the inductor, the leakage inductance (L 1k ) Second end of (1) and a first switch tubeS 1 ) Is connected to the first end of the first housing.
4. The multi-port converter according to claim 3, wherein the switch tube is a field effect transistor, and the first end of the switch tube is a drain of the field effect transistor; the second end of the switch tube is the source electrode of the field effect tube; the third end of the switch tube is the grid of the field effect tube.
5. A method of controlling a multi-port converter according to claim 4, comprising the steps of:
generating a first control signal I, a third control signal I and a fourth control signal I; the first control signal I controls the first switch tube (S 1 ) On/off of the first switch, the third control signal I controls the third switch tube (S 3 ) On/off of (3), the fourth control signal I is transmitted to the fourth switching tube (S 4 ) The multi-port converter has the following five working modes in sequence in one period:
the first working mode I: a first switch tube (S 1 ) Turn-off and third switch tube (S 3 ) Conducting, fourth switching tube (S 4 ) Conducting; DC power supply (V in ) To the first inductor (L 1 ) Charging, first inductor (L 1 ) The current of (1) starts to rise linearly, and the excitation inductance (c)L m ) To the secondary winding (L s ) And to a second capacitor (C o ) Charging, flowing through the excitation inductor (L m ) The current of (2) begins to drop;
the second working mode I: a first switch tube (S 1 ) Conducting, third switch tube (S 3 ) Turn-off and fourth switch tube (S 4 ) Turning off; first inductor (L 1 ) Through the first diode (D 1 ) Releasing energy to auxiliary batteries: (V b ) Flows through the first inductor (L 1 ) The current of (2) starts to drop linearly, the DC power supply (V in ) Simultaneously energizing inductors (L m ) And the leakage inductance (L 1k ) Charging, exciting inductance: (L m ) Current and leakage inductance of (L 1k ) Respectively, the current of (a) rises linearly, the first capacitance (a)C s ) Release energy until the fourth diode: (D 4 ) To 0;
the third working mode I: a first switch tube (S 1 ) Conducting, third switch tube (S 3 ) Turn-off, fourth switch tube (S 4 ) Off, first inductance: (L 1 ) Through a first diode (D 1 ) Continuing to release energy to the auxiliary battery (V b ) A first inductor (L 1 ) Current of (2) linear decrease, DC power supply (C)V in ) Continue to supply excitation inductance (L m ) And the feelings of leakage: (L 1k ) Charging, exciting inductance (L m ) Current and leakage inductance of (L 1k ) Respectively, the current of (2) rises linearly;
a fourth working mode I: a first switch tube (S 1 ) Turn-off, third switching tube (S 3 ) Turn-off, fourth switch tube (S 4 ) Conduction, first inductance (L 1 ) Through the first diode (D 1 ) Continue to release energy to the auxiliary batteryGroup (A), (B)V b ) First inductance (a)L 1 ) The current of (2) is linearly decreased and stored in the leakage inductance (C)L 1k ) To a first capacitor (C s ) Up to storage in leakage inductance: (L 1k ) The energy of (2) is released completely; stored in excitation inductance (L m ) To the secondary winding (L s ) And for the second capacitor (C o ) Charging, exciting inductance (L m ) The current begins to decrease linearly;
a fifth working mode I: first switch tube (S 1 ) Off, the third switch tube (S 3 ) Off, fourth switching tube (a)S 4 ) On, the first inductor (L 1 ) Through the first diode (D 1 ) Continuing to release energy to the auxiliary battery (V b ) A first inductor (L 1 ) The current of (2) is linearly decreased and stored in the exciting inductance (c)L m ) To the secondary winding (L s ) And to a second capacitor (C o ) Charging and exciting inductance (L m ) The current of (2) decreases linearly.
6. A method of controlling a multiport converter according to claim 4, characterized in that it comprises the steps of:
generating a first control signal II, a second control signal II and a fourth control signal II; the first control signal II controls the first switch tube (S 1 ) On/off of the first switch tube, the second control signal II controls the second switch tube (S 2 ) On/off of the fourth control signal II, the fourth control signal II is transmitted to the fourth switching tube (S 4 ) The multi-port converter has the following five working modes in sequence in one period:
the first working mode II: a first switch tube (S 1 ) Is turned on, firstTwo switching tubes (S 2 ) Conducting, the fourth switching tube (S 4 ) Off, DC source (C)V in ) Excitation inductance (L m ) And the leakage inductance (L 1k ) Charging and exciting inductance (L m ) Current and leakage inductance of (L 1k ) The current of (1) rises linearly, the first capacitance: (C s ) Release energy until the fourth diode: (D 4 ) To 0;
a second working mode II: a first switch tube (S 1 ) Conducting, the second switch tube (S 2 ) Conducting, fourth switch tube (a)S 4 ) Off, DC source (C)V in ) Continuing to supply excitation inductance (L m ) And the leakage inductance: (L 1k ) Charging, exciting inductance (L m ) Current and leakage inductance of (L 1k ) The current of (2) rises linearly;
a third working mode II: a first switch tube (S 1 ) Turn off, the second switch tube: (S 2 ) Conducting, fourth switch tube (a)S 4 ) Shut down, assist battery pack (V b ) Secondary winding (L s ) Transferring energy to the primary winding (L p ) And for excitation inductance: (L m ) Charging and exciting inductance (L m ) The current of (1) continues to rise linearly, and the leakage inductance (c)L 1k ) To the first capacitor (C s ) Up to leakage inductance (L 1k ) The energy of (2) is released completely;
a fourth working mode II: a first switch tube (S 1 ) Off, the second switch tube (S 2 ) Conducting, the fourth switching tube (S 4 ) Shut down, assist battery pack (V b ) Through the secondary winding (L s ) Will be provided withEnergy continues to be transferred to the primary winding (L p ) And giving excitation inductance (L m ) Charging, exciting inductance (L m ) The current of (2) continues to rise linearly;
a fifth working mode II: a first switch tube (S 1 ) Off, the second switch tube (S 2 ) Turn-off, fourth switch tube (S 4 ) Conduction, excitation inductance (L m ) To the secondary winding (L s ) And for the second capacitor (C o ) Charging and exciting inductance (L m ) The current of (2) decreases linearly.
7. A method of controlling a multi-port converter according to claim 4, comprising the steps of:
generating a first control signal III and a fourth control signal III; the first control signal III controls the first switch tube (S 1 ) On/off of the fourth control signal III, the fourth control signal III is transmitted to the fourth switching tube (S 4 ) And the multi-port converter has the following four working modes in sequence in one period:
a first working mode III: a first switch tube (S 1 ) Conducting, fourth switch tube (a)S 4 ) Turning off; DC power supply (V in ) For exciting inductance (c) simultaneouslyL m ) And the leakage inductance: (L 1k ) Charging and exciting inductance (L m ) Current and leakage inductance of (L 1k ) Respectively, the current of (a) rises linearly, the first capacitance (a)C s ) Release energy until the fourth diode: (D 4 ) To 0;
a second working mode III: first switch tube (S 1 ) Conducting, the fourth switching tube (S 4 ) Turning off; DC power supply (C)V in ) While simultaneously exciting the inductors: (L m ) And the leakage inductance: (L 1k ) Charging and exciting inductance (L m ) Current and leakage inductance of (L 1k ) Respectively, the current of (2) rises linearly;
a third working mode III: first switch tube (S 1 ) Turn-off, fourth switch tube (S 4 ) Conducting; leakage inductance (L 1k ) To a first capacitor (C s ) Excitation inductance (L m ) To the secondary winding (L s ) And for the second capacitor (C o ) Charging until leakage inductance (L 1k ) The current of (2) drops to zero;
fourth mode of operation III: first switch tube (S 1 ) Off, fourth switching tube (a)S 4 ) Conduction, leakage inductanceL 1k ) All the energy of (2) is released, excitation inductance (L m ) To the secondary winding (L s ) And continuing to apply to the second capacitor (C o ) And (6) charging.
8. A method of controlling a multi-port converter according to any of claims 3 to 4, comprising the steps of:
generating a second control signal IV and a fourth control signal IV; a second control signal IV controls a second switch tube (S 2 ) The fourth control signal IV is transmitted to the fourth switching tube (S 4 ) And the multi-port converter has the following two working modes in sequence in one period:
a first operating mode IV: second switch tube (S 2 ) Conducting, fourth switch tube (a)S 4 ) Shut down, assist battery pack (V b ) By means of a secondary winding (L s ) Transferring energy to the primary winding (L p ) And for excitation inductance (L m ) Charging and exciting inductance (L m ) The current of (2) rises linearly;
a second operating mode IV: a second switch tube (S 2 ) Off, fourth switching tube (a)S 4 ) Conduction, excitation inductance (L m ) To the secondary winding (L s ) And for the second capacitance (C o ) And (6) charging.
9. A method of controlling a multiport converter according to any of claims 3 to 4, characterized by the steps of:
generates a third control signal V which controls a third switching tube (V)S 3 ) Make and break, and make the multiport converter have following two kinds of working modes in a cycle in proper order:
a first working mode V: a third switch tube (S 3 ) Conducting, direct current power supply (V in ) Respectively for the first inductors (L 1 ) And an auxiliary battery pack (V b ) Providing energy, a first inductor (L 1 ) The current of (2) rises linearly;
a second working mode V: third switch tube (S 3 ) Off, first inductance: (L 1 ) Through a first diode (D 1 ) For auxiliary battery set (V b ) Releasing energy, first inductance: (L 1 ) The current of (2) decreases linearly.
CN202211320631.2A 2022-10-26 2022-10-26 Multi-port converter and control method thereof Pending CN115800753A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211320631.2A CN115800753A (en) 2022-10-26 2022-10-26 Multi-port converter and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211320631.2A CN115800753A (en) 2022-10-26 2022-10-26 Multi-port converter and control method thereof

Publications (1)

Publication Number Publication Date
CN115800753A true CN115800753A (en) 2023-03-14

Family

ID=85433907

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211320631.2A Pending CN115800753A (en) 2022-10-26 2022-10-26 Multi-port converter and control method thereof

Country Status (1)

Country Link
CN (1) CN115800753A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116805840B (en) * 2023-08-24 2023-11-10 深圳市恒运昌真空技术有限公司 Soft switching high-gain converter and control method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116805840B (en) * 2023-08-24 2023-11-10 深圳市恒运昌真空技术有限公司 Soft switching high-gain converter and control method thereof

Similar Documents

Publication Publication Date Title
Wu et al. Full-bridge three-port converters with wide input voltage range for renewable power systems
Zhu et al. PV isolated three-port converter and energy-balancing control method for PV-battery power supply applications
Shang et al. A modularization method for battery equalizers using multiwinding transformers
Cacciato et al. A critical evaluation and design of bi-directional DC/DC converters for super-capacitors interfacing in fuel cell applications
Shang et al. A global modular equalizer based on forward conversion for series-connected battery strings
US20150131330A1 (en) Bidirectional dc-dc converter system and circuit thereof
CN106787723A (en) A kind of multi input boosting DC/DC converters high
CN101345431A (en) Charging equalization device for series storage battery pack
CN111725993B (en) High-efficiency Sepic soft switch converter and control method thereof
CN104716841A (en) Multiple-output dc/dc converter and power supply having the same
CN113394975B (en) High-voltage gain DC-DC direct current converter
CN107612332A (en) The three Port Translation device systems applied to independent photovoltaic generating occasion
CN111371315B (en) Zero-input-current ripple high-gain DC-DC converter
CN115800753A (en) Multi-port converter and control method thereof
Jun et al. A novel three-port bi-directional DC-DC converter
CN111342664A (en) Integrated DC-DC converter and control method thereof
CN206294078U (en) A kind of multi input boosting DC/DC converters high
Jiya et al. Novel high gain multiport isolated DC-DC converter with bipolar symmetric outputs
Al-Soeidat et al. A compact three-port DC-DC converter for integrated PV-battery system
CN112787516B (en) Four-port converter based on center-tapped transformer and control method
Alluhaybi et al. Design and implementation of dual-input microinverter for PV-battery applications
CN113162408A (en) Coupling inductance high-gain DC/DC converter based on novel Boost switch capacitor energy storage structure
Adarsh et al. Multiport Converters to Integrate Multiple Sources and Loads-A Review of Topologies
CN110087366B (en) LED lighting Cuk-LLC three-port circuit and fuzzy prediction method thereof
CN207518282U (en) A kind of battery energy storage system of double tube positive exciting multiport separate current control

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB03 Change of inventor or designer information

Inventor after: Yue Weiping

Inventor after: Liu Tao

Inventor before: Yue Weiping

Inventor before: Liu Tao

Inventor before: Yue Ziyi

CB03 Change of inventor or designer information