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T-type coupled inductor network boost converter

A technology of boost converter and coupled inductor, which is applied in the direction of adjusting electrical variables, without intermediate conversion to AC conversion equipment, and DC power input conversion to DC power output, etc., which can solve problems such as reducing system performance, voltage and current spikes, etc.

Active Publication Date: 2018-07-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the voltage gain is increased by increasing the turns ratio of the existing converters that use coupled inductor technology to achieve voltage gain, which easily causes voltage and current peaks and seriously reduces the performance of the system. The present invention Provides a T-type coupled inductor network boost converter

Method used

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specific Embodiment approach 1

[0037] Specific implementation mode one: see figure 1 Describe this embodiment, the T-type coupled inductor network boost converter described in this embodiment includes a T-type coupled inductor network, a clamp-boost circuit, a power switch tube S, and a filter capacitor C o and rectifier diode D o ;

[0038] The T-type coupled inductor network includes: the first winding of the coupled inductor N 1 , The second winding of the coupled inductor N 2 , The third winding of the coupled inductor N 3 , the clamp-boost circuit includes a clamp diode D 1 , clamp capacitor C c , boost diode D 2 and boost capacitor C 1 ;

[0039] Among them, the coupled inductor first winding N 1 The opposite end of the coupled inductor, the second winding N 2 The dissenting terminal and the third winding of the coupled inductor N 3 The ends of the same name are connected together,

[0040] Coupled inductor first winding N 1 The eponymously terminated DC voltage source V in The positive...

specific Embodiment approach 2

[0046] Embodiment 2: The difference between this embodiment and the T-type coupled inductor network boost converter described in Embodiment 1 is that the first winding N of the coupled inductor 1 with a coupled inductor for the second winding N 2 The turns ratio is less than 1.

[0047] In this embodiment, when the first coupled inductor N 1 and the second coupled inductor N 2 The smaller the turns ratio (closer to 1), the greater the voltage gain of the boost converter, forming an approximate inverse proportional relationship, which effectively reduces the influence of leakage inductance and parasitic capacitance in the coupled inductor on the performance of the converter.

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Abstract

The invention relates to a T-type coupling inductance network boost converter and belongs to the power electronic converter technology field. By using an existing method, voltage and current peaks are easy to cause and system performance is reduced, wherein in the method, a converter uses a coupling inductance technology to realize boost; and through increasing a turns ratio, increase of a voltage gain is realized. By using the converter in the invention, the above problems are solved. The converter comprises a T-type coupling inductance network, a clamping-booster circuit, a power switch tube S, a filtering capacitor Co and a rectifier diode Do. An input terminal of the T-type coupling inductance network is connected to a direct current voltage source. An intermediate winding of the T-type coupling inductance network (a coupling inductance second winding N2) is connected to a power switch tube. An output terminal of the T-type coupling inductance network is connected to the clamping-booster circuit and then is connected to the rectifier diode and the filtering capacitor. The converter is mainly used in the boost transformation field.

Description

technical field [0001] The invention relates to a T-type coupled inductance network boost converter, which belongs to the technical field of power electronic converters. Background technique [0002] Boost converters are widely used in industrial fields, such as new energy power generation, fuel cells and other occasions. The traditional boost converter topology is a boost circuit, and the boost circuit is often used in occasions where the input voltage is relatively low and the output voltage is relatively high, such as a single photovoltaic cell module. However, due to the influence of parasitic parameters, the duty cycle cannot be too large. Generally, the limit boost ratio is about 5 times. Therefore, it is difficult for the boost circuit to increase the voltage of a single photovoltaic cell to the required bus voltage level. A converter that uses coupled inductor technology to achieve a boost generally achieves an increase in voltage gain by increasing the turns ratio....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/04H02M3/155
CPCH02M3/04H02M3/155
Inventor 刘洪臣李飞纪玉亮范国磊沈志芳张力彬李熙
Owner HARBIN INST OF TECH
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