Single-electrical-inductance double-step-down type half-bridge inverter working in half cycle and control method thereof

A half-bridge inverter and double step-down technology, which is applied in the direction of electrical components, output power conversion devices, AC power input conversion to DC power output, etc., can solve the problems of large volume and weight, and limit wide application, and achieve Simple control, no bias current, and low waveform distortion

Inactive Publication Date: 2009-01-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In practical applications, especially in high-voltage and low-frequency applicat

Method used

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  • Single-electrical-inductance double-step-down type half-bridge inverter working in half cycle and control method thereof
  • Single-electrical-inductance double-step-down type half-bridge inverter working in half cycle and control method thereof
  • Single-electrical-inductance double-step-down type half-bridge inverter working in half cycle and control method thereof

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Example Embodiment

[0014] As shown in Figure 1, a half-cycle single-inductance double-buck half-bridge inverter is characterized in that it is composed of a power supply circuit 1, a step-down circuit 2, and an output filter circuit 3, in which the power supply circuit 1 is connected in sequence. Including two identical DC power supplies, namely the first DC power supply U d1 , 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 electrode of the buck is connected to the ground; the 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 S 1 , The first parasitic body diode D S1 , The first blocking diode D 3 And the first freewheeling diode D 1 , The first power switch S 1 The drain and the first parasitic body diode D S1 After the cathode is connected to form the input terminal of the first step-down circuit 21, the...

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Abstract

The invention provides a single inductance double voltage reduction type half-bridge inverter working in half period and a control method thereof, belonging to the inverter and the control method thereof. The single inductance double voltage reduction type half-bridge inverter working in half period consists of a power supply circuit, a voltage reduction circuit and an output filter circuit which are connected one another in sequence, wherein the power supply circuit comprises a first DC power supply and a second DC power supply; the voltage reduction circuit comprises a first voltage reduction circuit and a second voltage reduction circuit; the first voltage reduction circuit comprises a first power switch tube, a first parasitic body diode, a first blocking diode, and a first afterflow diode; the second voltage reduction circuit comprises a second power switch tube, a second parasitic body diode, a second blocking diode, and a second afterflow diode; and the output filter circuit comprises an output filter inductance and an output filter capacitor. The control method obtains a high-low level drive signal of the power switch tube by a voltage and current dual-ring adjuster to realize the half period operation. The inverter has the advantages of small volume, light weight, small waveform distortion, high efficiency and no bias current.

Description

technical field [0001] The invention relates to an inverter in a power conversion device and a control method thereof, in particular to a half-cycle single-inductance double-buck half-bridge inverter and a control method thereof. 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] For example, the publication number CN10100...

Claims

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Application Information

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IPC IPC(8): H02M7/5387
Inventor 陈小刚王慧贞龚春英
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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