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Non-circulating current single-phase double-buck full-bridge inverter and its control strategy

A full-bridge inverter and circulating current control technology, which is applied in the field of power electronics and DC-AC power conversion, can solve the difficulty of filter design, limit the efficiency of the inverter, and cannot realize the unipolar non-circulating current operation of the inverter, etc. question

Active Publication Date: 2021-09-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing dual-buck full-bridge inverter control method either cannot realize the unipolar non-circulating current operation of the inverter, which limits the efficiency of the inverter; or it can realize the non-circulating current operation, but the operating frequency is not fixed. Filter design is difficult

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  • Non-circulating current single-phase double-buck full-bridge inverter and its control strategy
  • Non-circulating current single-phase double-buck full-bridge inverter and its control strategy
  • Non-circulating current single-phase double-buck full-bridge inverter and its control strategy

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Embodiment Construction

[0074] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0075] The unipolar modulation non-circulating current control strategy of the double Buck full bridge inverter is characterized in that:

[0076] The circuit schematic diagram of the double Buck full bridge inverter is attached figure 1 Shown: by the input voltage source (V in ), the first switching tube (S 1 ), the second switching tube (S 2 ), the third switching tube (S 3 ), the fourth switching tube (S 4 ), the first diode (D 1 ), the second diode (D 2 ), the third diode (D 3 ), the fourth diode (D 4 ), forward filter inductor (L P ), reverse filter inductor (L N ), public filter inductance (L f ) and load (Z). Among them, the DC input voltage source (V in ) is connected to the first switching tube (S 1 ) collector, the second switching tube (S 2 ) collector, the third diode (D 3 ) cathode and fourth diode (D 4 ) of the cathode; the first switch...

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Abstract

The invention discloses a non-circulating current single-phase double Buck full-bridge inverter and a control strategy thereof, belonging to the technical field of power electronic converters. The invention proposes a unipolar modulation fixed-frequency no-circulation current control strategy for the traditional double-Buck full-bridge inverter, which solves the problem that the traditional double-Buck full-bridge inverter control strategy cannot use unipolar modulation to enable fixed-frequency no-circulation current running problems, help to improve inverter efficiency. The dual-input dual-Buck full-bridge inverter proposed by the present invention can simultaneously connect two DC input sources and generate various levels, thereby improving the reliability and efficiency of the inverter. The unipolar modulation fixed-frequency no-circulation-current control strategy of the dual-input dual-Buck full-bridge inverter proposed by the present invention adopts unipolar modulation to make the dual-input dual-Buck full-bridge inverter operate at a fixed frequency without circulating current, further improving the Dual-input dual-Buck full-bridge inverter efficiency.

Description

technical field [0001] The invention relates to a non-circulating current single-phase double-Buck full-bridge inverter and a control strategy thereof, belonging to the technical field of power electronics, in particular to the technical field of DC-AC electric energy conversion. Background technique [0002] In recent years, the rapid development of more electric aircraft and new energy power generation has put forward higher requirements on the reliability and efficiency of inverters. In traditional bridge inverters, there is a risk of bridge arm shoot-through because the switch tube is connected in series with the input power supply. To this end, scholars have proposed a variety of dual-buck inverters. The dual Buck inverter solves the problem of through-through of the bridge arm of the traditional full-bridge inverter, and at the same time, it has higher efficiency because there is no need for freewheeling of the body diode. Among many dual-buck inverters, the dual-buc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/5387
CPCH02M7/5387
Inventor 杨帆葛红娟李言于兆龙吴红飞
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS