A voltage amplifier inverter
By adding an amplification inverter bridge group and a coupling transformer to the inverter, the problem that existing inverters cannot be effectively supercharged is solved, and the voltage amplification and volume reduction effect is achieved, which is suitable for high-power applications.
Patent Information
- Application Number
- CN202110121864.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-01-28
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2041-01-28
AI Technical Summary
The output voltage of existing inverters cannot be higher than the input DC voltage, resulting in the need to increase the voltage when it is necessary to add a larger boost transformer, especially in high-power applications.
By adding an amplified inverter bridge group and a coupling transformer, a voltage amplification inverter is provided to reduce capacity requirements. Although the number of IGBTs is increased, the volume of the entire inverter is reduced.
The voltage increase is achieved, and the inverter volume and capacity requirements are reduced, making it suitable for high-power applications.
Smart Images
Figure CN114826003B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an inverter, in particular to a voltage amplifier inverter. Background Art
[0002] An inverter is a device that converts direct current into alternating current. Figure 1 As shown, in general, the output voltage of the inverter cannot be higher than the input DC voltage. Therefore, if the voltage needs to be increased, a step-up transformer needs to be added after the inverter. However, since the capacity of the step-up transformer must be consistent with the capacity of the inverter, the volume is too large, which is particularly serious in high-power applications. Summary of the invention
[0003] The purpose of the present invention is to provide a voltage amplifier inverter. By adding an amplifier inverter bridge group and a coupling transformer, an amplifier inverter can be provided and the capacity requirement can be reduced. Although the number of IGBTs is increased, the volume of the entire inverter is reduced.
[0004] The purpose of the present invention can be achieved by the following technical solutions:
[0005] A voltage amplifier inverter comprises a capacitor voltage divider circuit and a main inverter bridge group, wherein two ends of the main inverter bridge group are respectively connected to two ends of the capacitor voltage divider circuit; the inverter further comprises an amplifier inverter bridge group and a coupling transformer, wherein two ends of the amplifier inverter bridge group are respectively connected to two ends of the capacitor voltage divider circuit, and the output end of the main inverter bridge group is connected to one end of a primary coil of the coupling transformer, the output end of the amplifier inverter bridge group is connected to one end of a secondary coil of the coupling transformer, the other end of the primary coil of the coupling transformer is connected to one pole of an inverter output end, the other end of the secondary coil is connected to the other pole of the inverter output end, and is connected to the voltage divider output end of the capacitor voltage divider circuit.
[0006] The main inverter bridge group consists of two IGBT modules.
[0007] The amplifier inverter bridge group is composed of two IGBT modules.
[0008] The output end of the inverter is provided with a filter module.
[0009] The filtering module is a filtering capacitor.
[0010] The inverter further includes a controller connected to the main inverter bridge group and the booster inverter bridge group.
[0011] The controller is a single chip microcomputer.
[0012] The inverter further includes a wireless signal transceiver, and the wireless signal transceiver is connected to the controller.
[0013] The wireless signal transceiver is a WiFi module.
[0014] The number of turns of the primary coil of the coupling transformer is greater than the number of turns of the secondary coil.
[0015] Compared with the prior art, the present invention has the following beneficial effects: by adding an amplifier inverter bridge group and a coupling transformer, an amplifier inverter can be provided and the capacity requirement can be reduced. Although the number of IGBTs is increased, the volume of the entire inverter is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the prior art;
[0017] Figure 2 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION
[0018] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.
[0019] A voltage amplifier inverter, such as Figure 2 As shown, it includes a capacitor voltage divider circuit and a main inverter bridge group, and the two ends of the main inverter bridge group are respectively connected to the two ends of the capacitor voltage divider circuit. The inverter also includes an amplifier inverter bridge group and a coupling transformer T. The two ends of the amplifier inverter bridge group are respectively connected to the two ends of the capacitor voltage divider circuit, and the output end of the main inverter bridge group is connected to one end of the primary coil of the coupling transformer T, the output end of the amplifier inverter bridge group is connected to one end of the secondary coil of the coupling transformer T, the other end of the primary coil of the coupling transformer T is connected to one pole of the inverter output end, the other end of the secondary coil is connected to the other pole of the inverter output end, and is connected to the voltage divider output end of the capacitor voltage divider circuit, and the capacitor voltage divider circuit is obtained by connecting capacitors C1 and C2 in series.
[0020] By adding an amplifying inverter bridge group and a coupling transformer T, an amplifying inverter can be provided and the capacity requirement can be reduced. Although the number of IGBTs is increased, the volume of the entire inverter is reduced.
[0021] In some embodiments, the main inverter bridge group is composed of two IGBT modules, namely V1 and V2, and the boost inverter bridge group is also composed of two IGBT modules, namely V3 and V4.
[0022] In some embodiments, a filter module is provided at the output end of the inverter, and the filter module is a filter capacitor.
[0023] In some embodiments, the inverter further includes a controller, which is connected to the main inverter bridge group and the amplifier inverter bridge group. The controller is a single chip microcomputer. The inverter further includes a wireless signal transceiver, which is connected to the controller. The wireless signal transceiver is a WiFi module, which can be wirelessly controlled.
[0024] The ratio of the number of turns of the primary coil of the coupling transformer T to the number of turns of the secondary coil is N / n. By changing this ratio, the amplification ratio can be modified, Uo'=Uo+Up*N / n, where Uo' is the amplified voltage, Uo is the original output AC voltage, and Up is the voltage of the secondary coil. In some embodiments, the number of turns of the primary coil of the coupling transformer T is greater than the number of turns of the secondary coil.
Claims
1. A voltage amplifier inverter, comprising a capacitor voltage divider circuit and a main inverter bridge group, wherein two ends of the main inverter bridge group are respectively connected to two ends of the capacitor voltage divider circuit, characterized in that: The inverter also includes an amplifying inverter bridge group and a coupling transformer, wherein two ends of the amplifying inverter bridge group are respectively connected to two ends of a capacitor voltage divider circuit, and the output end of the main inverter bridge group is connected to one end of a primary coil of the coupling transformer, the output end of the amplifying inverter bridge group is connected to one end of a secondary coil of the coupling transformer, the other end of the primary coil of the coupling transformer is connected to one pole of an inverter output end, the other end of the secondary coil is connected to the other pole of the inverter output end, and is connected to a voltage divider output end of the capacitor voltage divider circuit.
2. A voltage amplifier inverter according to claim 1, characterized in that: The main inverter bridge group consists of two IGBT modules.
3. The voltage amplifier inverter according to claim 1, characterized in that: The amplifier inverter bridge group is composed of two IGBT modules.
4. The voltage amplifier inverter according to claim 1, characterized in that: The output end of the inverter is provided with a filter module.
5. The voltage amplifier inverter according to claim 4, characterized in that: The filtering module is a filtering capacitor.
6. The voltage amplifier inverter according to claim 1, characterized in that: The inverter further includes a controller connected to the main inverter bridge group and the booster inverter bridge group.
7. The voltage amplifier inverter according to claim 6, characterized in that: The controller is a single chip microcomputer.
8. The voltage amplifier inverter according to claim 6, characterized in that: The inverter further includes a wireless signal transceiver, and the wireless signal transceiver is connected to the controller.
9. The voltage amplifier inverter according to claim 8, characterized in that: The wireless signal transceiver is a WiFi module.
10. The voltage amplifier inverter according to claim 1, characterized in that: The number of turns of the primary coil of the coupling transformer is greater than the number of turns of the secondary coil.
Citation Information
Patent Citations
Voltage amplification inverter
CN214506901U