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dc/dc boost converter module and circuit

A technology for transforming modules and capacitors, which is applied in the electronic field and can solve problems such as inability to protect circuits

Active Publication Date: 2017-05-10
SHENZHEN HOPEWIND ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a DC / DC boost conversion module and circuit, which aims to solve the problem that the existing DC / DC boost conversion circuit cannot protect the circuit when the switch tube fails

Method used

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  • dc/dc boost converter module and circuit

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Embodiment 1

[0028] Such as image 3 As shown, the embodiment of the present invention proposes a DC / DC step-up conversion module, including an inductor L2, a switch tube T2, a diode D2, a capacitor C2 and a protection unit F2 (a fuse is used in this embodiment), and the positive pole of the input power Vin Connect to one end of the inductor L2, the other end of the inductor L2 is connected to the anode of the diode D2 and the positive pole of the switch tube T2, the cathode of the diode D2 is connected to the positive pole of the capacitor C2 and the positive pole of the output, and the negative pole of the switch tube T2 is connected to the negative pole of the capacitor C2 and the fuse One end of the fuse F2; the other end of the fuse F2 is connected to the negative pole of the input power supply Vin and the negative pole of the output. The switch tube T2 above can be a MOS tube or an IGBT. When the switch tube is a MOS tube, the positive pole is the D pole of the MOS tube, and the nega...

Embodiment 2

[0037] Such as Figure 8 As shown, this embodiment also proposes a DC / DC step-up conversion circuit, including at least two image 3 As shown in the DC / DC boost conversion module, the at least two DC / DC boost conversion modules are connected in parallel between the input power supply and the output, that is, the input ends of all DC / DC boost conversion modules are connected in parallel to the input Power supply, the output ends of all DC / DC step-up conversion modules are connected in parallel to the output. Four groups of photovoltaic modules PV1, PV2, PV3 and PV4 can be used to form the input voltage Vin after fusion of respective branch fuses. Take the nominal rated current of PV1, PV2, PV3 and PV4 as 8.0A, and the standard light short-circuit current of 9A as an example, choose fuses of 10-15A for F6 and F7. The maximum open-circuit voltage of PV1 and PV2 is 1000V, and the full-load MPPT voltage range is 450-750V. Assume that the output voltage Vo of the DC / DC boost conve...

Embodiment 3

[0040] Such as Figure 9 Shown is another embodiment of the present invention. The difference between this embodiment and Embodiment 1 is that the protection unit in Embodiment 1 uses automatic protection devices (such as fuses, fuses, etc.), while in this embodiment, switching devices T6 (such as contactors, thyristors SCR, IGBT, Mos tube, etc.), in Figure 9 The short-circuit failure of the switching tube T3 in the shown DC / DC voltage conversion module causes the fault to expand, which will further lead to overheating or smoke. The switching device T6 can be disconnected according to these fault phenomena, so as to realize the circuit protection function.

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Abstract

A DC / DC boost conversion module, comprising an inductor (L2), a switching tube (T2), a diode (D2), a capacitor (C2), and a protection unit (F2). The positive electrode of a power input (Vin) is connected to one terminal of the inductor (L2). The other terminal of the inductor (L2) is connected to the positive electrode of the diode (D2) and to the positive electrode of the switching tube (T2). The negative electrode of the diode (D2) is connected to the positive electrode of the capacitor (C2) and to the positive electrode of the output (Vo). The negative electrode of the switching tube (T2) is connected to the negative electrode of the capacitor (C2) and to one terminal of the protection unit (F2). The other terminal of the protection unit (F2) is connected to the negative electrode of the power input (Vin) and to the negative electrode of the output (Vo). The DC / DC boost conversion module can provide effective protection for the circuit and the system when the switching tube becomes ineffective due to short circuits.

Description

technical field [0001] The invention belongs to the field of electronic technology, and in particular relates to a DC / DC step-up conversion module and circuit. Background technique [0002] figure 1 Shown is a conventional DC / DC boost converter circuit, input voltage Vin, input current Iin, when the switch tube T1 is turned on, the current of the inductor L1 increases; when the switch tube T1 is turned off, the current of the inductor L1 continues through the diode D1 current to charge capacitor C1. In this circuit, the output voltage Vo is greater than the input voltage Vin, the input current Iin is greater than the output current Io, and the current flowing through the fuse F1 is equal to Iin. [0003] Fuse F1 plays a protective role in this circuit, especially when the switch tube T1 in the figure fails due to a short circuit, at this time Vin is always added to the inductor L1, causing the current of the inductor L1 to continue to rise until the protection unit F1 is b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155H02S40/30H02H3/087
CPCH02M3/155Y02E10/50
Inventor 肖安波
Owner SHENZHEN HOPEWIND ELECTRIC CO LTD
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