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A Design Method of Resonant Tank Parameters for Bidirectional DC-DC Converter

A DC-DC, design method technology, applied in the direction of converting DC power input to DC power output, instruments, adjusting electrical variables, etc., can solve problems such as cumbersome design process, and achieve the effect of accurate parameters and simple design process

Active Publication Date: 2020-07-28
XIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for designing the resonant tank parameters of a bidirectional DC-DC converter, which solves the need for trial and error, repeated iterations, and cumbersome design process when designing the resonant tank parameters of a symmetrical LLC resonant bidirectional DC-DC converter. The problem

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  • A Design Method of Resonant Tank Parameters for Bidirectional DC-DC Converter
  • A Design Method of Resonant Tank Parameters for Bidirectional DC-DC Converter
  • A Design Method of Resonant Tank Parameters for Bidirectional DC-DC Converter

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Embodiment Construction

[0048] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0049] Symmetrical LLC resonant bidirectional DC-DC converter such as figure 1 As shown, it includes a first switch network, a resonant tank, a second switch network, a first power supply and a second power supply, the two ends of the DC side of the first switch network are respectively connected to the two ends of the first power supply, the first switch network The two ends of the AC side are connected to the input end of the resonance tank, and the second power supply is connected to the output end of the resonance tank through the second switch network.

[0050] The first switching network includes a switching tube Q 1 , switch tube Q 2 , switch tube Q 3 , switch tube Q 4 , capacitance C 1 , capacitance C 2 , capacitance C 3 , capacitance C 4 , Diode D 1 , Diode D 2 , Diode D 3 , Diode D 4 .

[0051] The resonance tank includ...

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Abstract

The design method of the resonant tank parameters of the bidirectional DC-DC converter disclosed by the present invention firstly calculates the ratio k of the first resonant inductance of the primary side of the transformer and the exciting inductance; then after step 1, according to the formula and the minimum normalized frequency f n，min Get the maximum value Q of the quality factor Q max , take Q=Q max ; After step 2, calculate the resonance tank parameter L r1 , L r2 , L m and C r1 、C r2 ; where Z r =QR eq ; Solve the problem that the parameters of the resonant tank of the symmetrical LLC resonant bidirectional DC-DC converter need to be tried and tested, repeated iterations, and the design process is cumbersome.

Description

technical field [0001] The invention belongs to the technical field of converter parameter design, and relates to a method for designing the parameters of a resonant tank of a bidirectional DC-DC converter. Background technique [0002] The high-power isolated bidirectional DC-DC converter can realize the functions of DC transformation, bidirectional energy transmission and electrical isolation. It has application prospects in the fields of electric vehicles, renewable energy, DC power distribution systems, uninterruptible power supply systems, and power electronic transformers. broad. [0003] Since the DC-DC converter topology using LLC resonance has natural soft switching characteristics, it can realize zero-voltage conduction of the inverter switch on the primary side of the transformer and zero-voltage conduction of the rectifier diode on the secondary side of the transformer in a wide range of input voltage and full load. The advantages of current shutdown, no need fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33584H02M1/0058Y02B70/10
Inventor 陈桂涛李海平孙向东白力静
Owner XIAN UNIV OF TECH