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Coupling inductor employed boosting inverter and control method thereof

A technology of coupled inductors and inverters, which is applied to electrical components, high-efficiency power electronic conversion, and conversion of AC power input to DC power output. It can solve problems such as low step-up ratio, improve conversion efficiency, and implement control strategies easily. , the effect of reducing the volume

Inactive Publication Date: 2018-04-24
HOHAI UNIV WENTIAN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of low boost ratio in the boost inverter in the prior art, the present invention provides a coupled inductor boost inverter and its control method

Method used

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  • Coupling inductor employed boosting inverter and control method thereof
  • Coupling inductor employed boosting inverter and control method thereof
  • Coupling inductor employed boosting inverter and control method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Such as figure 1 As shown, a coupled inductor boost inverter in this embodiment includes a diode D 1 、D 2 、D S3 and D S4 , switch tube S 1 , S 2 , S 3 , S 4 and S 5 ; The primary winding N of the coupled inductor T 1 and the secondary winding N 2 ; Capacitance C 1 ;

[0059] Diode D 1 The anode is connected to one end of the input power supply Uin, and the diode D 1 The cathode is connected to the primary winding N of the coupled inductor T 1 end of the same name;

[0060] Primary winding N of coupled inductor T 1 Non-identical terminal and switch tube S 1 Terminal A, switch tube S 2 A terminal and capacitor C 1 connected at one end;

[0061] Switch tube S 1 C terminal, diode D 3 Cathode, switch tube S 5 The A terminal of the terminal is connected to the other terminal of the input power supply Uin;

[0062] Diode D 3 anode, diode D 2 Cathode and Capacitor C 2 connected at one end;

[0063] Capacitance C 2 The other end and the primary windin...

Embodiment 2

[0072] combine figure 1 , a coupled inductor boost inverter of this embodiment is further improved on the basis of Embodiment 1, because the capacitor C 1 and C 2 Both are intermediate energy storage elements, which play the role of energy conversion, and the capacitor C 1 and C 2 All are non-polar capacitors, which make the circuit work reliably and increase the working life of the circuit.

Embodiment 3

[0074] combine figure 1 , a coupled inductance boost inverter of this embodiment is further improved on the basis of embodiment 1 or 2, and further includes a filter, the nodes a and b are connected to the input ends of the filter, and the filter The output terminal is connected to the load R o or the grid.

[0075] In this embodiment, the step-up inverter is completed, and the output terminal of the filter, that is, the output voltage u o directly for the load R o power supply, or the output voltage u o Feedback to the grid.

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Abstract

The invention discloses a coupling inductor employed boosting inverter and a control method thereof and belongs to the technical field of power electronic converters. The inverter includes a diode D1,a diode D2, a diode DS3 and a diode DS4, a switch tube S1, a switch tube S2, a switch tube S3, a switch tube S4, a switch tube S5, a primary winding N1 and an auxiliary winding N2 of a coupling inductor T and a capacitor C1. The anode of the diode D1 is connected with one end of an input power source Uin. A cathode of the diode D1 is connected with a dotted terminal of a primary winding N1 of thecoupling inductor T. A non-dotted terminal of the primary winding N1 of the coupling inductor T is connected with an A terminal of the switch tube S1, an A terminal of the switch tube S2 and one endof the capacitor C1. A C terminal of the switch tube S1, the cathode of a diode D3, an A terminal of the switch tube S5 are connected with the other end of the input power source Uin. The anode of thediode D3 and the cathode of the diode D2 are connected with one end of the capacitor C2. Aiming at a problem of low boosting ratio of a boosting inverter in the prior art, the inverter provided by the invention is high integration level, high in boosting ratio and flexible in boosting ratio adjustment.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a coupled inductance boost inverter and a control method thereof. Background technique [0002] In traditional technology, when DC voltage is converted into AC voltage, the two-stage method of DC boost and inverter combination is often used. The DC / DC two-stage cascaded inverter of the front stage and the rear stage DC / AC can convert the DC Voltage is converted to AC voltage. However, the two-stage cascaded inverter requires many devices, large volume and weight, and low conversion efficiency. In order to achieve stable operation of the system, the matching adjustment between the front stage and the rear stage is relatively complicated. [0003] In recent years, more and more scholars have begun to turn their research attention to single-stage boost inverters. In 2002, Peng Fangzheng proposed the Z-source inverter, which solved some shortcomings of the tradi...

Claims

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Application Information

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IPC IPC(8): H02M7/537H02M1/12H02M1/34
CPCH02M1/126H02M1/34H02M7/537H02M1/0054H02M1/346Y02B70/10
Inventor 王琳
Owner HOHAI UNIV WENTIAN COLLEGE
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