DC-DC converter, bidirectional DC-DC converter and uninterruptible power supply comprising bidirectional DC-DC converter
A technology of DC-DC and converter, which is applied in the field of uninterruptible power supply, can solve the problems that the voltage cannot be controlled independently, and the DC-DC converter 2 cannot be connected in parallel with uninterruptible power supply, so as to achieve the effect of bidirectional transmission
Pending Publication Date: 2020-05-29
EATON INTELLIGENT POWER LTD
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[0100] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0101] Figure 9 is a circuit diagram of the DC-DC converter according to the first embodiment of the present invention. The DC-DC converter 3 includes an inductor L31, an IGBT T31, and an inductor L32 connected in sequence, a diode D33, an inductor L33, and a diode D32 connected in sequence, and a capacitor C31 and a capacitor C32, wherein one end of the capacitor C31 is connected to The node formed by connecting the collector of the inductor L31 and the IGBT T31, and the other end is connected to the anode of the diode D32; one end of the capacitor C32 is connected to one end of the inductor L32 and the emitter phase of the IGBT T31 Connect the formed node, and connect the other end to the cathode of diode D33.
[0102] Wherein, on...
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The invention provides a DC-DC converter, a bidirectional DC-DC converter and an uninterruptible power supply comprising the bidirectional DC-DC converter. The DC-DC converter comprises a first inductor, a first switching tube, a second inductor, a first diode, a third inductor and a second diode, a first capacitor and a second capacitor; the first inductor, the first switching tube and the secondinductor are connected in sequence; the first diode, the third inductor and the second diode are connected in sequence; the first capacitor is connected between a node formed by connecting one end ofthe first switching tube and the first inductor and the anode of the second diode; and the second capacitor is connected between a node formed by connecting the other end of the first switching tubeand the second inductor and the cathode of the first diode. The DC-DC converter provided by the invention can carry out buck or boost charging on a rechargeable battery, or enables the rechargeable battery to carry out buck or boost discharging, and can be applied to uninterruptible power supply parallel connection.
Description
technical field [0001] The invention relates to the field of electronic circuits, in particular to a DC-DC converter, a bidirectional DC-DC converter and an uninterruptible power supply including the same. Background technique [0002] A DC-DC converter is an electrical device widely used in uninterruptible power supplies. The input terminal of the DC-DC converter is connected to the rechargeable battery, and its output terminal is connected to the positive and negative DC bus bars in the uninterruptible power supply. When the mains power fails, the DC-DC converter boosts the DC power in the rechargeable battery and outputs it to the positive and negative DC buses. [0003] figure 1 It is a circuit diagram of the first DC-DC converter in the prior art connected between the DC bus of the uninterruptible power supply and the rechargeable battery and in the charging mode. like figure 1 As shown, the DC-DC converter 1 includes an inductance L11, a capacitor C11 and a diode D...
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IPC IPC(8): H02M3/155H02J7/00H02J9/06
CPCH02M3/155H02J7/0068H02J9/061H02M7/48H02M5/458H02M1/4208Y02B70/10H02M3/1557
Inventor 李化良欧阳华奋郑大为袁沛华刘学钢
Owner EATON INTELLIGENT POWER LTD