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An output branch structure based on coupled inductor

A technology of coupled inductance and branch circuit is applied in the output power conversion device, the conversion of DC power input to DC power output, electrical components and other directions, which can solve the problems of large switching loss and reduction, and achieve cost and volume reduction The effect of small switching losses

Inactive Publication Date: 2020-05-29
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this type of converter, only the number of switching tubes is reduced, and the number of magnetic components, which account for a large proportion of weight and volume, is exactly the same as that of independent multiple converters, so the cost and volume of the system are only slightly improved.
In addition, in the above multi-output DC converter with multiplexed inductors or switching tubes, the switching tubes are hard switches, which will cause large switching losses

Method used

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  • An output branch structure based on coupled inductor
  • An output branch structure based on coupled inductor
  • An output branch structure based on coupled inductor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] figure 2 A schematic structural diagram of a dual-output soft-switching DC converter constructed by applying the output branch structure based on coupled inductors of the present invention to a traditional Sepic converter is given. It is powered by a DC input voltage source V i , The coupled inductor T with the primary and secondary turns ratio of 1:1 1 , switch tube S 1 ~S 3 , Diode D 1 , capacitance C, inductance L and including the output capacitance C o1～2 , output resistance R 1～2 The two outputs are composed together. The coupled inductor T 1 Equivalent to primary side excitation inductance L m , Primary leakage inductance L r and an ideal transformer with a turn ratio of 1:1; the switching tube S 1 ~S 3 It is formed by parallel connection of N-channel MOSFET, anti-parallel diode and parasitic capacitance.

[0021] DC input voltage source V i The positive pole of the coupled inductor T 1 The same-named ends of the primary and secondary sides are con...

Embodiment 2

[0036] Figure 10 A schematic structural diagram of a dual-output soft-switching DC converter constructed by applying the present invention to a traditional Cuk converter is given. The converter is powered by a DC input voltage source V i , The coupled inductor T with the primary and secondary turns ratio of 1:1 1 , switch tube S 1 ~S 3 , Diode D 1 , capacitance C, inductance L and including the output capacitance C o1～2 , output resistance R 1～2 The two outputs are composed together. The coupled inductor T 1 Equivalent to primary side excitation inductance L m , Primary leakage inductance L r and an ideal transformer with a turn ratio of 1:1; the switching tube S 1 ~S 3 It is formed by parallel connection of N-channel MOSFET, anti-parallel diode and parasitic capacitance.

[0037] DC input voltage source V i The positive pole of the coupled inductor T 1 The same-named ends of the primary and secondary sides are connected; the coupled inductance T 1 The opposite...

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Abstract

The invention discloses an output branch structure based on a coupled inductor, and relates to power electronics. The output branch structure based on the coupled inductor comprises the coupled inductor T1, a switch tube S3, a diode D1, an output capacitor Co2 and an output resistor R2, wherein dotted terminals of a primary side and a secondary side of the coupled inductor T1 are connected to a port a, a synonymous terminal of the primary side is marked as a port b, and a synonymous terminal of the secondary side is connected with a drain electrode of the switch tube S3; a source electrode ofthe switch tube S3 is connected with a positive electrode of the diode D1; a negative electrode of the diode D1 is connected with the output capacitor Co2; the other end of the output capacitor Co2 isgrounded; the output resistor R2 and the output capacitor Co2 are serially connected; the port a and the port b replace two ends of original input filter inductors of Sepic and Cuk input current-typesingle-output DC converters respectively through connection to build a corresponding dual-output DC converter. The input current of the newly-built dual-output converter is equal to the sum of the primary current and the secondary current of the coupled inductor T1, and when the turn ratio of the coupled inductor T1 is 1:1, the input current is continuous.

Description

technical field [0001] The invention relates to power electronics, in particular to an output branch circuit structure based on coupling inductance which can replace the input filter inductance in the input current type single output DC converter, realize dual output and improve the performance of the original converter. Background technique [0002] With the development of science and technology, various electronic devices have been widely used in industrial production and daily life. Since the power supply voltage required by different electronic devices is different, it is necessary to provide them with a variety of different levels of voltage through the power electronic converter. To meet this need, each electronic device can be equipped with a separate single output converter. However, this solution will result in high cost and bulky system due to the need for multiple independent converters. [0003] In order to reduce the cost and volume, relevant research at home ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/00H02M3/155
Inventor 陈桂鹏刘雨薇卿新林
Owner XIAMEN UNIV