Isolated energy routing device

Abstract

The utility model relates to an isolated energy routing device, which comprises a group of multi-tap high-frequency isolation transformers with equal turn ratio, each group of taps on two sides of the high-frequency isolation transformers are respectively connected with a routing access module, and a power conversion unit and a voltage stabilization unit are arranged in each routing access module. Compared with the prior art, the multi-tap isolation transformer has the advantages that energy interaction and electrical isolation are realized by using the multi-tap isolation transformer, the efficiency is improved, the electrical isolation capability is improved, the volume of the transformer is related to the total interaction power and is irrelevant to the number of routing groups, and the volume of a plurality of routing groups is reduced.

Description

Technical Field

[0001] This utility model relates to the field of power technology, and in particular to an isolated energy routing device. Background Technology

[0002] With the emergence of the digital grid concept, people began to break down the massive synchronous power grid into asynchronous, autonomous, interconnected local area networks (LANs). Energy allocation and network interconnection are achieved through digital grid routers, leading to the proposal of an energy internet centered on power routers, also aiming to provide better solutions for renewable energy access. Current energy routing devices consist of three-phase isolation transformers, each phase of which includes at least two power modules and mutual inductance windings. Any two different power modules are coupled through these windings, and the three-phase AC ports connected to different power modules are different. Existing energy routing devices suffer from an excessive number of components and a large size due to multiple routing configurations. Utility Model Content

[0003] The purpose of this invention is to overcome the defects of the existing technology and provide an isolated energy routing device.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] An isolated energy routing device includes a set of multi-tap high-frequency isolation transformers with equal turns ratio. Each set of taps on both sides of the high-frequency isolation transformer is connected to a routing access module. The routing access module includes a power conversion unit and a voltage regulation unit.

[0006] As a preferred technical solution, the voltage input of the power conversion unit is fed into two Z-source networks after passing through the parallel filter capacitor C1, and the output terminals of the two Z-source networks are respectively connected to the two bridge arms of the full-bridge inverter circuit.

[0007] As a preferred technical solution, the input terminals of the Z-source network are connected to inductor L1 and forward diode D1, respectively. A forward diode D3 is connected after inductor L1, and inductor L2 is connected after diode D1. A diode D2 is connected between the output terminals of inductor L1 and diode D1. The Z-source network operates in two states: when the MOSFET is turned on, the two inductors and two diodes operate in parallel; when the MOSFET is turned off, the two inductors and one diode operate in series.

[0008] As a preferred technical solution, the Z-source network operates with two inductors and two diodes in parallel when the power switch of the corresponding bridge arm is turned on; and with two inductors and one diode in series when the power switch of the corresponding bridge arm is turned off.

[0009] As a preferred technical solution, the full-bridge inverter circuit consists of four power devices S1, S2, S3, and S4; the power switches S1 and S3 of the first bridge arm are connected to capacitor C2; and the power switches S2 and S4 of the second bridge arm are connected to capacitor C3.

[0010] As a preferred technical solution, when the full-bridge inverter circuit is running, S1 and S4, S2 and S3 are turned on simultaneously, S1 and S3 are turned on complementaryly, and the voltage of C2 is equal to the voltage of C3. When S1 and S4 are turned on, C3 outputs electrical energy, and L1 and L2 are charged at this time. When S2 and S3 are turned on, C2 outputs electrical energy to supply power, and L3 and L4 are charged at this time.

[0011] As a preferred technical solution, the voltage input of the voltage regulator unit passes through the parallel filter capacitor C4, and its positive input passes through the series color code inductor L5 and the rectifier diode D8 in sequence; the color code inductor L5 is an energy storage inductor, and its two ends are connected in parallel with an oscillation circuit and a voltage regulator circuit.

[0012] As a preferred technical solution, the oscillator includes transistors T1 and T2, and capacitor C5; the input terminal of the color code inductor L5 is connected to the emitter of transistor T1, the collector of transistor T1 is connected to the base of transistor T2, and the base of transistor T1 is connected to the negative input terminal through a pull-down resistor R1; the collector of transistor T2 is connected to the output terminal of color code inductor L5, and the emitter of transistor T2 is connected to the negative input terminal; capacitor C5 is connected between the base of transistor T1 and the collector of transistor T2.

[0013] As a preferred technical solution, the voltage regulator circuit includes C6 as the output filter capacitor, transistor T3, diode D7, diode D9 and resistor R2.

[0014] As a preferred technical solution, a reverse diode D7 is connected between the base of transistor T1 and the pull-down resistor R1, the other end of diode D7 is connected to the collector of transistor T3, the base of transistor T3 is connected to a reverse diode D9, the emitter of transistor T3 is connected to the positive terminal of the output, and a current-limiting resistor R2 is connected between the base and emitter of transistor T3; a filter capacitor C6 is provided between the positive and negative terminals of the output.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention utilizes a multi-tap isolation transformer to achieve energy exchange and electrical isolation, thereby improving efficiency and enhancing electrical isolation capabilities. The transformer size is related to the total power exchanged and is independent of the number of routing groups, thus reducing the size of multiple routing groups. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of the isolated energy routing device of this utility model;

[0018] Figure 2 This is a circuit diagram of the power conversion unit of this utility model;

[0019] Figure 3 This is a circuit diagram of the voltage regulator unit of this utility model;

[0020] The numbers in the diagram indicate: 1. High-frequency isolation transformer, 2. Routing access module, 21. Power conversion unit, 22. Voltage stabilizing unit. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0022] Example 1

[0023] like Figure 1 As shown, this utility model proposes an isolated energy routing device, including a set of multi-tap high-frequency isolation transformers 1 with equal turns ratio. Each set of taps on both sides of the high-frequency isolation transformer 1 is connected to a routing access module 2. The routing access module 2 includes a power conversion unit 21 and a voltage regulator unit 22.

[0024] This invention employs multiple routing access modules, with one end serving as the energy routing access interface and the other end connected to a high-frequency isolation transformer 1 as the core of energy interaction, providing port isolation. The multi-tap isolation transformer 1 achieves energy interaction and electrical isolation, improving efficiency and enhancing electrical isolation capabilities. Simultaneously, the transformer's size is related to the total interaction power and independent of the number of routing groups, reducing the overall size of the multiple routing modules. The topology connecting the routing end and the transformer end of the routing access module is completely consistent, improving module convenience and technical consistency; both ends are interchangeable.

[0025] like Figure 2 The diagram shown is a circuit diagram of the power conversion unit 22 of this utility model. After the voltage input passes through the parallel filter capacitor C1, its positive input is connected to the two bridge arms of the full-bridge inverter circuit through a Z-source network.

[0026] The Z-source network consists of two inductors and three diodes. Two of the inductors and diodes form an impedance network. The input terminals of the Z-source network are connected to inductor L1 and a forward-biased diode D1. A forward-biased diode D3 is connected after inductor L1, and inductor L2 is connected after diode D1. A diode D2 is connected between the output terminals of inductor L1 and diode D1. The Z-source network operates in two states: when the corresponding bridge arm power switch is on, the two inductors and two diodes operate in parallel; when the corresponding bridge arm power switch is off, the two inductors and one diode operate in series.

[0027] The full-bridge inverter circuit includes four power switches S1, S2, S3, and S4. A capacitor C2 is connected between power switches S1 and S3 in the first bridge arm; a capacitor C3 is connected between power switches S2 and S4 in the second bridge arm. During normal operation, S1 and S4, and S2 and S3 are simultaneously turned on, with S1 and S3 being complementary. The voltage across C2 is equal to the voltage across C3. When S1 and S4 are on, C3 outputs power, charging L1 and L2. When S2 and S3 are on, C2 outputs power, charging L3 and L4.

[0028] like Figure 3 The diagram shows the circuit diagram of the voltage regulator unit 22 of this invention. After passing through the parallel filter capacitor C4, the positive input voltage passes sequentially through the series color-coded inductor L5 and the rectifier diode D8. The color-coded inductor L5 is an energy storage inductor, and its two ends are connected in parallel with an oscillation circuit and a voltage regulator circuit. An oscillator is formed by transistors T1 and T2, and capacitor C5. Specifically, the input terminal of the color-coded inductor L5 is connected to the emitter of transistor T1, and the collector of transistor T1 is connected to the base of transistor T2. The base of transistor T1 is connected to the negative input terminal through a pull-down resistor R1. The collector of transistor T2 is connected to the output terminal of the color-coded inductor L5, and the emitter of transistor T2 is connected to the negative input terminal. A capacitor C5 is also connected between the base of transistor T1 and the collector of transistor T2. On the other hand, C6 serves as the output filter capacitor, and transistor T3, diode D7, diode D9, and resistor R2 constitute a voltage regulator circuit for stabilizing the output voltage. The output voltage of voltage regulator unit 22 is approximately equal to the voltage regulation value of D9.

[0029] Specifically, a reverse diode D7 is connected between the base of transistor T1 and the pull-down resistor R1. The other end of diode D7 is connected to the collector of transistor T3. The base of transistor T3 is connected to a reverse diode D9. The emitter of transistor T3 is connected to the positive terminal of the output. A current-limiting resistor R2 is connected between the base and emitter of transistor T3. A filter capacitor C6 is provided between the positive and negative terminals of the output.

[0030] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An isolated energy routing device, characterized in that, The high-frequency isolation transformer (1) includes a set of multi-tap equal turns ratio high-frequency isolation transformers (1). Each set of taps on both sides of the high-frequency isolation transformer (1) is connected to a routing access module (2). The routing access module (2) includes a power conversion unit (21) and a voltage regulation unit (22).

2. The isolated energy routing device according to claim 1, characterized in that, The voltage input of the power conversion unit (21) is fed into two Z-source networks after passing through the parallel filter capacitor C1. The output terminals of the two Z-source networks are respectively connected to the two bridge arms of the full-bridge inverter circuit.

3. The isolated energy routing device according to claim 2, characterized in that, The input terminals of the Z-source network are connected to inductor L1 and forward diode D1, respectively. A forward diode D3 is connected after inductor L1, and inductor L2 is connected after diode D1. A diode D2 is connected between the output terminals of inductor L1 and diode D1. The Z-source network operates in two states: when the MOSFET is turned on, the two inductors and two diodes operate in parallel; when the MOSFET is turned off, the two inductors and one diode operate in series.

4. The isolated energy routing device according to claim 3, characterized in that, When the power switch of the corresponding bridge arm is turned on, the Z-source network operates with two inductors and two diodes in parallel; when the power switch of the corresponding bridge arm is turned off, the two inductors and one diode operate in series.

5. An isolated energy routing device according to claim 2, characterized in that, The full-bridge inverter circuit consists of four power devices S1, S2, S3, and S4; the power switches S1 and S3 of the first bridge arm are connected to capacitor C2; and the power switches S2 and S4 of the second bridge arm are connected to capacitor C3.

6. The isolated energy routing device according to claim 5, characterized in that, When the full-bridge inverter circuit is running, power devices S1 and S4 are turned on simultaneously, and power devices S2 and S3 are turned on simultaneously. S1 and S3 are turned on complementaryly, and the voltage of C2 is equal to the voltage of C3. When S1 and S4 are turned on, C3 outputs electrical energy, and L1 and L2 are charged at this time. When S2 and S3 are turned on, C2 outputs electrical energy to supply power, and L3 and L4 are charged at this time.

7. The isolated energy routing device according to claim 1, characterized in that, The voltage input of the voltage regulator unit (22) passes through the parallel filter capacitor C4, and its positive input passes through the series color code inductor L5 and the rectifier diode D8 in sequence; the color code inductor L5 is an energy storage inductor, and its two ends are connected in parallel with an oscillation circuit and a voltage regulator circuit.

8. An isolated energy routing device according to claim 7, characterized in that, The oscillation circuit includes transistors T1 and T2, and capacitor C5. The input terminal of the color code inductor L5 is connected to the emitter of transistor T1, the collector of transistor T1 is connected to the base of transistor T2, and the base of transistor T1 is connected to the negative input terminal through a pull-down resistor R1. The collector of transistor T2 is connected to the output terminal of color code inductor L5, and the emitter of transistor T2 is connected to the negative input terminal. A capacitor C5 is connected between the base of transistor T1 and the collector of transistor T2.

9. An isolated energy routing device according to claim 8, characterized in that, The voltage regulator circuit includes C6 as the output filter capacitor, transistor T3, diode D7, diode D9, and resistor R2.

10. An isolated energy routing device according to claim 9, characterized in that, A reverse-biased diode D7 is connected between the base of transistor T1 and the pull-down resistor R1. The other end of diode D7 is connected to the collector of transistor T3. The base of transistor T3 is connected to a reverse-biased diode D9. The emitter of transistor T3 is connected to the positive terminal of the output. A current-limiting resistor R2 is connected between the base and emitter of transistor T3. A filter capacitor C6 is provided between the positive and negative terminals of the output.

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