Multi-module half-bridge resonant DC-DC converter
By designing a multi-module half-bridge resonant DC-DC converter, using diode rectifier bridge topology and combined topology, the output voltage continuous adjustment and low voltage stress of fully controlled switching devices are achieved, solving the high cost and reliability of the system in the existing technology. The problem of low performance enables low power consumption and high efficiency converter design.
Patent Information
- Application Number
- CN202420596437.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-03-26
AI Technical Summary
In the case where the input voltage is large but the output voltage and output current are not required, the system cost is high, the reliability is low, and the traditional structure uses a large number of devices, resulting in high power consumption.
A multi-module half-bridge resonant DC-DC converter is designed, using diode rectifier bridge topology and multiple combined topology A or B. The output voltage is achieved through appropriate control methods and even continuous adjustment of the full range of output voltages is reduced to reduce the full control switch. The voltage stress of the device, and the switching device is turned on at zero voltage and the diode is turned off at zero current.
A multi-module half-bridge resonant DC-DC converter with low system cost, high reliability and low power consumption is realized. All fully controlled switching devices are subject to low voltage stress, and improve system efficiency through continuous adjustment and zero voltage and zero current control. .
Smart Images
Figure CN222441564U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of power electronics, in particular to a multi-module half-bridge resonant DC-DC converter. Background Art
[0002] In recent years, the popularity of electric vehicles and the application of distributed power generation have put forward new requirements for DC-DC converters. DC-DC converters are divided into isolated and non-isolated converters. Due to the presence of transformers, the input and output ends of isolated converters are electrically isolated, effectively ensuring the safety of personnel and equipment. Among the existing isolated converters, resonant converters have the ability to achieve soft switching, which can effectively reduce switching losses and have received extensive attention and research in the field of high-frequency power conversion.
[0003] In traditional resonant converters, full-bridge resonant converters are considered to be complex structures with complex control and a large number of fully controlled switching devices. In contrast, half-bridge structures are more attractive, using fewer fully controlled switching devices and a simpler structure. According to the different connection methods of the input and output ends of the standardized modules, four combinations of systems can be constructed, namely, input series and output series, input series and output parallel, input parallel and output series, and input parallel and output parallel. The input series and output series structure is mainly used in situations where both the input voltage and output voltage are large; the input series and output parallel is mainly used in situations where both the input voltage and output current are large; the input parallel and output series structure is mainly used in situations where the input voltage is low and the output voltage is high; the input parallel and output parallel structure is mainly used in situations where the input voltage is low and the output current is large. However, for situations where the input voltage is large but the output voltage and output current are not required, the traditional input series and output parallel, input series and output series structures are not applicable, and the traditional structure uses a large number of devices, resulting in excessive system cost and low system reliability.
[0004] The purpose of the utility model is to provide a multi-module half-bridge resonant DC-DC converter suitable for occasions where the input voltage is large but no requirements are made on the output voltage and output current. The multi-module half-bridge resonant DC-DC converter system proposed by the utility model has low cost, high reliability, low power consumption, and all fully controlled switch devices are subjected to small voltage stress. Moreover, by adopting a suitable control method, the multi-module half-bridge resonant DC-DC converter proposed by the utility model can achieve wide range or even full range continuous adjustment of output voltage, all fully controlled switch devices are turned on with zero voltage, and all diodes are turned off with zero current, thereby improving system efficiency. Utility Model Content
[0005] To achieve the above-mentioned purpose, the utility model provides a multi-module half-bridge resonant DC-DC converter, including a main power circuit, the main power circuit includes a diode rectifier bridge topology and N combination topologies A, wherein N is a positive integer, the diode rectifier bridge topology includes a bridge composed of four ordinary diodes D1, D2, D3, D4, an output DC capacitor C0 and a load R, the ordinary diode D1 and the ordinary diode D2 are located in the same bridge arm, the ordinary diode D3 and the ordinary diode D4 are located in the same bridge arm, the cathode of the ordinary diode D1 and the cathode of the ordinary diode D3, the output DC capacitor C0 The first terminal p is connected to the first terminal p of the load R, the anode of the common diode D1 is connected to the first terminal e of the diode rectifier bridge topology and the cathode of the common diode D2, the anode of the common diode D3 is connected to the second terminal f of the diode rectifier bridge topology and the cathode of the common diode D4, the anode of the common diode D2 is connected to the anode of the common diode D4, the second terminal n of the output DC capacitor C0, and the second terminal n of the load R, the combined topology A includes a branch capacitor C1, two fully controlled switch devices S1, S2, a transformer TR, and a resonant inductor L r , a resonant capacitor C r , the branch capacitor C1, the fully controlled switch devices S1, S2, the resonant inductor L r With the resonant capacitor C r Located at the primary winding side of the transformer TR, the fully controlled switch device S1 and the fully controlled switch device S2 are located in the same bridge arm, the first terminal p of the branch capacitor C1 is connected to the first terminal p of the fully controlled switch device S1, the second terminal n of the fully controlled switch device S1 is connected to the first terminal p of the fully controlled switch device S2, the resonant capacitor C r The first terminal p is connected to the resonant capacitor C r The second terminal n and the resonant inductor L r The first terminal p is connected to the resonant inductor L rThe second terminal n of the fully-controlled switch device S2 is connected to the first terminal a on the primary winding side of the transformer TR, the second terminal n of the fully-controlled switch device S2 is connected to the second terminal b on the primary winding side of the transformer TR and the second terminal n of the branch capacitor C1; the main power circuit includes N combination topologies A, wherein the second terminal n of the branch capacitor C1 of each combination topology A is connected to the first terminal p of the branch capacitor C1 of the next combination topology A in sequence, and the second terminal d on the secondary winding side of the transformer TR of each combination topology A is connected to the second terminal n of the branch capacitor C1 of the next combination topology A in sequence. The first terminal c on the secondary winding side of the transformer TR is connected in sequence, and the remaining four free ends of the combined topology A are connected, that is, the first terminal p of the branch capacitor C1 of the first combined topology A is connected to the positive electrode of the input voltage, the second terminal n of the branch capacitor C1 of the Nth combined topology A is connected to the negative electrode of the input voltage, the first terminal c on the secondary winding side of the transformer TR of the first combined topology A is connected to the first terminal e of the diode rectifier bridge topology, and the second terminal d on the secondary winding side of the transformer TR of the Nth combined topology A is connected to the second terminal f of the diode rectifier bridge topology.
[0006] In order to achieve the above-mentioned object, the utility model provides a multi-module half-bridge resonant DC-DC converter, including a main power circuit, wherein the main power circuit includes a diode rectifier bridge topology and N combination topologies B, wherein N is a positive integer, the diode rectifier bridge topology includes a bridge circuit composed of four ordinary diodes D1, D2, D3, D4, an output DC capacitor C0 and a load R, the ordinary diode D1 and the ordinary diode D2 are located in the same bridge arm, the ordinary diode D3 and the ordinary diode D4 are located in the same bridge arm, the cathode of the ordinary diode D1 and the cathode of the ordinary diode D3, the output DC capacitor C0 The first terminal p is connected to the first terminal p of the load R, the anode of the common diode D1 is connected to the first terminal e of the diode rectifier bridge topology and the cathode of the common diode D2, the anode of the common diode D3 is connected to the second terminal f of the diode rectifier bridge topology and the cathode of the common diode D4, the anode of the common diode D2 is connected to the anode of the common diode D4, the second terminal n of the output DC capacitor C0, and the second terminal n of the load R, and the combined topology B includes a branch capacitor C1, two fully controlled switch devices S1, S2, a transformer TR, and a resonant inductor L r , a resonant capacitor C r , the branch capacitor C1, the fully controlled switch devices S1, S2, the resonant inductor L r With the resonant capacitor C rLocated on the primary winding side of the transformer TR, the fully controlled switch device S1 and the fully controlled switch device S2 are located in the same bridge arm, the first terminal p of the branch capacitor C1 is connected to the first terminal p of the fully controlled switch device S1, the second terminal n of the fully controlled switch device S1 is connected to the first terminal p of the fully controlled switch device S2, the resonant inductor L r The first terminal p is connected to the resonant inductor L r The second terminal n and the resonant capacitor C r The first connection terminal p of the transformer TR is connected to the first connection terminal a of the primary winding side of the transformer TR, and the resonant capacitor C r The second terminal n of the branch capacitor C1 is connected to the second terminal b of the primary winding of the transformer TR, the second terminal n of the branch capacitor C1, and the second terminal n of the fully controlled switch device S2; the main power circuit includes N combination topologies B, wherein the second terminal n of the branch capacitor C1 of each combination topology B is connected to the first terminal p of the branch capacitor C1 of the next combination topology B in sequence, and the second terminal d of the secondary winding of the transformer TR of each combination topology B is connected to the first terminal d of the secondary winding of the transformer TR of the next combination topology B in sequence. A terminal c is connected in sequence, and the remaining four free ends of the combined topology B are connected, that is, the first terminal p of the branch capacitor C1 of the first combined topology B is connected to the positive electrode of the input voltage, the second terminal n of the branch capacitor C1 of the Nth combined topology B is connected to the negative electrode of the input voltage, the first terminal c on the secondary winding side of the transformer TR of the first combined topology B is connected to the first terminal e of the diode rectifier bridge topology, and the second terminal d on the secondary winding side of the transformer TR of the Nth combined topology B is connected to the second terminal f of the diode rectifier bridge topology.
[0007] The advantages and positive effects of the utility model of a multi-module half-bridge resonant DC-DC converter are: providing a new type of multi-module half-bridge resonant DC-DC converter circuit. The multi-module half-bridge resonant DC-DC converter system has low cost, high reliability, low power consumption, and all fully controlled switch devices are subjected to small voltage stress. Moreover, by adopting a suitable control method, the multi-module half-bridge resonant DC-DC converter proposed by the utility model can achieve wide range or even full range continuous adjustment of output voltage, all fully controlled switch devices are turned on at zero voltage, and all diodes are turned off at zero current, and has the advantage of high system efficiency.
[0008] The present invention will be described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1It is a circuit diagram of the combined topology A in the multi-module half-bridge resonant DC-DC converter of the utility model;
[0010] Figure 2 This is a circuit topology diagram of the first embodiment of the multi-module half-bridge resonant DC-DC converter of the utility model;
[0011] Figure 3 It is a circuit diagram of the combined topology B in the multi-module half-bridge resonant DC-DC converter of the utility model;
[0012] Figure 4 This is a circuit topology diagram of the second embodiment of the multi-module half-bridge resonant DC-DC converter of the utility model. DETAILED DESCRIPTION
[0013] The specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings to fully understand the purpose, features and effects of the utility model. This embodiment provides a detailed implementation and specific operation process, but the protection scope of the utility model is not limited to this embodiment.
[0014] In the embodiment of the multi-module half-bridge resonant DC-DC converter of the utility model, the multi-module half-bridge resonant DC-DC converter is an integral circuit topology composed of a diode rectifier bridge topology and a plurality of combined topologies.
[0015] Reference Figure 1 and Figure 2 In the first embodiment of the multi-module half-bridge resonant DC-DC converter of the present utility model, the main power circuit includes a diode rectifier bridge topology and N combination topologies A, where N is a positive integer.
[0016] The diode rectifier bridge topology includes a bridge circuit consisting of four ordinary diodes D1, D2, D3, and D4, an output DC capacitor C0, and a load R. The ordinary diode D1 and the ordinary diode D2 are located in the same bridge arm, the ordinary diode D3 and the ordinary diode D4 are located in the same bridge arm, the cathode of the ordinary diode D1 is connected to the cathode of the ordinary diode D3, the first terminal p of the output DC capacitor C0, and the first terminal p of the load R, the anode of the ordinary diode D1 is connected to the first terminal e of the diode rectifier bridge topology and the cathode of the ordinary diode D2, the anode of the ordinary diode D3 is connected to the second terminal f of the diode rectifier bridge topology and the cathode of the ordinary diode D4, and the anode of the ordinary diode D2 is connected to the anode of the ordinary diode D4, the second terminal n of the output DC capacitor C0, and the second terminal n of the load R.
[0017] Combined topology A includes a branch capacitor C1, two fully controlled switching devices S1, S2, a transformer TR, and a resonant inductor L r, a resonant capacitor C r , branch capacitor C1, fully controlled switching devices S1, S2, resonant inductor L r With the resonant capacitor C r Located on the primary winding side of the transformer TR, the fully controlled switching device S1 and the fully controlled switching device S2 are located in the same bridge arm, the first terminal p of the branch capacitor C1 is connected to the first terminal p of the fully controlled switching device S1, the second terminal n of the fully controlled switching device S1 is connected to the first terminal p of the fully controlled switching device S2, the resonant capacitor C r The first terminal p is connected to the resonant capacitor C r The second terminal n and the resonant inductor L r The first terminal p is connected to the resonant inductor L r The second terminal n of the fully-controlled switch S2 is connected to the first terminal a on the primary winding side of the transformer TR, and the second terminal n of the branch capacitor C1 is connected to the second terminal b on the primary winding side of the transformer TR and the second terminal n of the branch capacitor C1; the main power circuit includes N combination topologies A, wherein the second terminal n of the branch capacitor C1 of each combination topology A is connected to the first terminal p of the branch capacitor C1 of the next combination topology A in sequence, and the second terminal d of the secondary winding side of the transformer TR of each combination topology A is connected to the first terminal c of the secondary winding side of the transformer TR of the next combination topology A in sequence, and the remaining four free ends of the connected combination topologies A, that is, the first terminal p of the branch capacitor C1 of the first combination topology A is connected to the positive electrode of the input voltage, the second terminal n of the branch capacitor C1 of the Nth combination topology A is connected to the negative electrode of the input voltage, the first terminal c of the secondary winding side of the transformer TR of the first combination topology A is connected to the first terminal e of the diode rectifier bridge topology, and the second terminal d of the secondary winding side of the transformer TR of the Nth combination topology A is connected to the second terminal f of the diode rectifier bridge topology.
[0018] Reference Figure 3 and Figure 4 In the second embodiment of the multi-module half-bridge resonant DC-DC converter of the present utility model, the main power circuit includes a diode rectifier bridge topology and N combination topologies B, where N is a positive integer.
[0019] The diode rectifier bridge topology includes a bridge circuit consisting of four ordinary diodes D1, D2, D3, and D4, an output DC capacitor C0, and a load R. The ordinary diode D1 and the ordinary diode D2 are located in the same bridge arm, the ordinary diode D3 and the ordinary diode D4 are located in the same bridge arm, the cathode of the ordinary diode D1 is connected to the cathode of the ordinary diode D3, the first terminal p of the output DC capacitor C0, and the first terminal p of the load R, the anode of the ordinary diode D1 is connected to the first terminal e of the diode rectifier bridge topology and the cathode of the ordinary diode D2, the anode of the ordinary diode D3 is connected to the second terminal f of the diode rectifier bridge topology and the cathode of the ordinary diode D4, and the anode of the ordinary diode D2 is connected to the anode of the ordinary diode D4, the second terminal n of the output DC capacitor C0, and the second terminal n of the load R.
[0020] Combined topology B includes a branch capacitor C1, two fully controlled switching devices S1, S2, a transformer TR, and a resonant inductor L r , a resonant capacitor C r , branch capacitor C1, fully controlled switching devices S1, S2, resonant inductor L r With the resonant capacitor C r Located on the primary winding side of the transformer TR, the fully controlled switching device S1 and the fully controlled switching device S2 are located in the same bridge arm, the first terminal p of the branch capacitor C1 is connected to the first terminal p of the fully controlled switching device S1, the second terminal n of the fully controlled switching device S1 is connected to the first terminal p of the fully controlled switching device S2, and the resonant inductor L r The first terminal p is connected to the resonant inductor L r The second terminal n and the resonant capacitor C r The first terminal p of the transformer TR is connected to the first terminal a of the primary winding side, and the resonant capacitor C rThe second terminal n is connected to the second terminal b on the primary winding side of the transformer TR, the second terminal n of the branch capacitor C1, and the second terminal n of the fully controlled switching device S2; the main power circuit includes N combination topologies B, wherein the second terminal n of the branch capacitor C1 of each combination topology B is connected to the first terminal p of the branch capacitor C1 of the next combination topology B in sequence, and the second terminal d on the secondary winding side of the transformer TR of each combination topology B is connected to the first terminal c on the secondary winding side of the transformer TR of the next combination topology B in sequence, and the remaining four free ends of the connected combination topologies B, that is, the first terminal p of the branch capacitor C1 of the first combination topology B is connected to the positive electrode of the input voltage, the second terminal n of the branch capacitor C1 of the Nth combination topology B is connected to the negative electrode of the input voltage, the first terminal c on the secondary winding side of the transformer TR of the first combination topology B is connected to the first terminal e of the diode rectifier bridge topology, and the second terminal d on the secondary winding side of the transformer TR of the Nth combination topology B is connected to the second terminal f of the diode rectifier bridge topology.
[0021] The advantages and positive effects of the utility model of a multi-module half-bridge resonant DC-DC converter are: providing a new type of multi-module half-bridge resonant DC-DC converter circuit. The multi-module half-bridge resonant DC-DC converter system has low cost, high reliability, low power consumption, and all fully controlled switch devices are subjected to small voltage stress. Moreover, by adopting a suitable control method, the multi-module half-bridge resonant DC-DC converter proposed by the utility model can achieve wide range or even full range continuous adjustment of output voltage, all fully controlled switch devices are turned on at zero voltage, and all diodes are turned off at zero current, and has the advantage of high system efficiency.
[0022] The embodiments described above are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design scheme of the present invention, various modifications and improvements made to the technical scheme of the present invention by engineers and technicians in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the claims.
Claims
1. A multi-module half-bridge resonant DC-DC converter, characterized in that: The invention comprises a main power circuit, wherein the main power circuit comprises a diode rectifier bridge topology and N combination topologies A, wherein N is a positive integer, the diode rectifier bridge topology comprises a bridge circuit composed of four ordinary diodes D1, D2, D3, and D4, an output DC capacitor C0, and a load R, wherein the ordinary diode D1 and the ordinary diode D2 are located in the same bridge arm, the ordinary diode D3 and the ordinary diode D4 are located in the same bridge arm, the cathode of the ordinary diode D1 and the cathode of the ordinary diode D3, the first connection terminal p of the output DC capacitor C0, and the first connection terminal p of the load R are connected to each other. The anode of the common diode D1 is connected to the first terminal e of the diode rectifier bridge topology and the cathode of the common diode D2. The anode of the common diode D3 is connected to the second terminal f of the diode rectifier bridge topology and the cathode of the common diode D4. The anode of the common diode D2 is connected to the anode of the common diode D4, the second terminal n of the output DC capacitor C0, and the second terminal n of the load R. The combined topology A includes a branch capacitor C, two fully controlled switch devices S1 and S2, a transformer TR, and a resonant inductor L. r , a resonant capacitor C r , the branch capacitor C1, the fully controlled switch devices S1, S2, the resonant inductor L r With the resonant capacitor C r Located at the primary winding side of the transformer TR, the fully controlled switch device S1 and the fully controlled switch device S2 are located in the same bridge arm, the first terminal p of the branch capacitor C1 is connected to the first terminal p of the fully controlled switch device S1, the second terminal n of the fully controlled switch device S1 is connected to the first terminal p of the fully controlled switch device S2, the resonant capacitor C r The first terminal p is connected to the resonant capacitor C r The second terminal n and the resonant inductor L r The first terminal p is connected to the resonant inductor L r The second terminal n of the fully-controlled switch device S2 is connected to the first terminal a on the primary winding side of the transformer TR, the second terminal n of the fully-controlled switch device S2 is connected to the second terminal b on the primary winding side of the transformer TR and the second terminal n of the branch capacitor C1; the main power circuit includes N combination topologies A, wherein the second terminal n of the branch capacitor C1 of each combination topology A is sequentially connected to the first terminal p of the branch capacitor C1 of the next combination topology A, and the second terminal d on the secondary winding side of the transformer TR of each combination topology A is sequentially connected to the second terminal n of the branch capacitor C1 of the next combination topology A. The first terminal c on the secondary winding side of the transformer TR is connected in sequence, and the remaining four free ends of the connected combination topology A, that is, the first terminal p of the branch capacitor C1 of the first combination topology A is connected to the positive electrode of the input voltage, the second terminal n of the branch capacitor C1 of the Nth combination topology A is connected to the negative electrode of the input voltage, the first terminal c on the secondary winding side of the transformer TR of the first combination topology A is connected to the first terminal e of the diode rectifier bridge topology, and the second terminal d on the secondary winding side of the transformer TR of the Nth combination topology A is connected to the second terminal f of the diode rectifier bridge topology.
2. A multi-module half-bridge resonant DC-DC converter, characterized in that: The invention comprises a main power circuit, wherein the main power circuit comprises a diode rectifier bridge topology and N combination topologies B, wherein N is a positive integer, the diode rectifier bridge topology comprises a bridge composed of four ordinary diodes D1, D2, D3, D4, an output DC capacitor C0 and a load R, the ordinary diode D1 and the ordinary diode D2 are located in the same bridge arm, the ordinary diode D3 and the ordinary diode D4 are located in the same bridge arm, the cathode of the ordinary diode D1 and the cathode of the ordinary diode D3, the first connection terminal p of the output DC capacitor C0, and the first connection terminal p of the load R are connected to each other. The anode of the common diode D1 is connected to the first terminal e of the diode rectifier bridge topology and the cathode of the common diode D2. The anode of the common diode D3 is connected to the second terminal f of the diode rectifier bridge topology and the cathode of the common diode D4. The anode of the common diode D2 is connected to the anode of the common diode D4, the second terminal n of the output DC capacitor C0, and the second terminal n of the load R. The combined topology B includes a branch capacitor C1, two fully controlled switch devices S1 and S2, a transformer TR, and a resonant inductor L. r , a resonant capacitor C r , the branch capacitor C1, the fully controlled switch devices S1, S2, the resonant inductor L r With the resonant capacitor C r Located on the primary winding side of the transformer TR, the fully controlled switch device S1 and the fully controlled switch device S2 are located in the same bridge arm, the first terminal p of the branch capacitor C1 is connected to the first terminal p of the fully controlled switch device S1, the second terminal n of the fully controlled switch device S1 is connected to the first terminal p of the fully controlled switch device S2, the resonant inductor L r The first terminal p is connected to the resonant inductor L r The second terminal n and the resonant capacitor C r The first connection terminal p of the transformer TR is connected to the first connection terminal a of the primary winding side of the transformer TR, and the resonant capacitor C r The second terminal n of the branch capacitor C1 is connected to the second terminal b of the primary winding of the transformer TR, the second terminal n of the branch capacitor C1, and the second terminal n of the fully controlled switch device S2; the main power circuit includes N combination topologies B, wherein the second terminal n of the branch capacitor C1 of each combination topology B is connected to the first terminal p of the branch capacitor C1 of the next combination topology B in sequence, and the second terminal d of the secondary winding of the transformer TR of each combination topology B is connected to the first terminal d of the secondary winding of the transformer TR of the next combination topology B in sequence. A terminal c is connected in sequence, and the remaining four free ends of the combined topology B are connected, that is, the first terminal p of the branch capacitor C1 of the first combined topology B is connected to the positive electrode of the input voltage, the second terminal n of the branch capacitor C1 of the Nth combined topology B is connected to the negative electrode of the input voltage, the first terminal c on the secondary winding side of the transformer TR of the first combined topology B is connected to the first terminal e of the diode rectifier bridge topology, and the second terminal d on the secondary winding side of the transformer TR of the Nth combined topology B is connected to the second terminal f of the diode rectifier bridge topology.