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Half-cycle control tri-level single-inductor dual buck half bridge inverter and control method thereof

A half-bridge inverter and single-inductor technology, which is applied in the direction of converting irreversible DC power input into AC power output, electrical components, and AC power input into DC power output, etc., which can solve the problem of large volume and weight and wide restrictions Application and other issues

Inactive Publication Date: 2009-10-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

In practical applications, especially in high-voltage and low-frequency applications, the filter has a large volume and weight, which limits its wide application

Method used

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  • Half-cycle control tri-level single-inductor dual buck half bridge inverter and control method thereof
  • Half-cycle control tri-level single-inductor dual buck half bridge inverter and control method thereof
  • Half-cycle control tri-level single-inductor dual buck half bridge inverter and control method thereof

Examples

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Embodiment Construction

[0016] Such as figure 1 As shown, a half-cycle control three-level single-inductance double-buck half-bridge inverter includes: a power supply circuit 1, a step-down circuit 2 and an output filter circuit 3, wherein the power supply circuit 1 includes two identical DC power supplies, namely The first DC power supply U d1 and the second DC power supply U d2 , the first DC power supply U d1 The negative pole and the second DC power supply U d2 The positive pole is connected to ground; step-down circuit 2 includes a first step-down circuit 21 and a second step-down circuit 22, wherein the first step-down circuit 21 includes a first power switch tube S 1 , the second power switch tube S 2 , the first parasitic body diode D S1 , the second parasitic body diode D S2 , the first blocking diode D 3 , the first clamping diode D 1 and the first freewheeling diode D 2 , the first power switch S 1 The drain and the first parasitic body diode D S1 After the cathode of the first ...

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Abstract

The invention discloses a half-cycle control tri-level single-inductor dual buck half bridge inverter and a control method thereof, belonging to the field of inverters. The inverter comprises a power circuit, a buck circuit and an output filter circuit, wherein the power circuit comprises a first direct current power and a second direct current power, the buck circuit comprises a first buck circuit and a second buck circuit, and the output filter circuit comprises an output filter inductor and an output filter capacitor. The control method of the inverter is as follows: the high level driving signal and the low level driving signal of a power switch tube are obtained by a voltage and current dual ring regulator, thus realizing half-cycle work. The inverter has small volume, light weight, no offset current, small waveform distortion, and high efficiency.

Description

technical field [0001] The invention relates to an inverter in an electric energy conversion device, in particular to a half-cycle controlled three-level single-inductance double-buck half-bridge inverter and a control method thereof, belonging to the field of inverters. Background technique [0002] With the development of high-frequency power devices, the switching frequency of inverters has been greatly increased, and the development of AC power sources such as aviation power supplies, UPS systems, and high-performance motor drives has put forward higher requirements for the performance of inverters. How to further increase the power density while achieving high frequency and high efficiency of the inverter has become a key issue in current research. Since the double-buck half-bridge inverter and its control method were proposed, it has been researched and applied a lot due to its novel circuit structure, no shoot-through, no dead time, and low switching loss. [0003] F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48H02M7/537
Inventor 陆芬王慧贞陈小刚
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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