DC conversion device and control method
A technology of DC conversion and control method, which is applied in the direction of conversion of DC power input to DC power output, output power conversion device, circuit device, etc., which can solve problems such as complicated circuit structure and achieve the effect of reducing complexity
Pending Publication Date: 2022-04-08
KEHUA DATA CO LTD +1
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Problems solved by technology
[0004] In view of this, the embodiment of the present invention provides a DC conversion device and a control method to solve the problem in the prior art that a balance bridge and a DC conversion circuit need to be installed between the battery and the DC bus, and the circuit structure is complicated.
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[0031] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
[0032] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.
[0033] refer to figure 1 and figure 2 , an embodiment of the present invention provides a DC conversion device, including: a first switching tube Q1, a second switching tube Q2, a third switching tube Q3, a first inductor L1, a second inductor L2, a first capacitor C...
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The invention is suitable for the technical field of power supplies, and provides a direct current conversion device and a control method, the device comprises a first switch tube, a second switch tube, a third switch tube, a first inductor, a second inductor, a first switch, a second switch and a third switch; the first switch tube, the second switch tube and the third switch tube are connected in series between the positive direct-current bus and the negative direct-current bus; the first end of the first inductor is connected with the intersection point of the first switch tube and the second switch tube; the first end of the second inductor is connected with the intersection of the second switch tube and the third switch tube; the second end of the first inductor is connected with the positive electrode of the battery through the first switch; the second end of the second inductor is connected with the battery cathode through the third switch; the first end of the second switch is connected with the second end of the first inductor or the second end of the second inductor, and the second end of the second switch is connected with the N line. According to the invention, a balance bridge and a step-down circuit are combined into one, and conversion among different circuit topologies is realized through a switch, so that the complexity of the circuit is greatly reduced.
Description
technical field [0001] The invention belongs to the technical field of power supplies, and in particular relates to a DC conversion device and a control method. Background technique [0002] UPS (Uninterruptible Power Supply, uninterruptible power supply) is an energy supply device used to provide uninterrupted power supply for power electronic equipment. [0003] In the prior art, since the battery has no N wire, the positive and negative poles of the battery may have a bias voltage with respect to the N wire, thereby causing the voltage imbalance of the DC bus. Therefore, UPS usually also needs to set up a balance bridge for voltage equalization. When the battery is charging, the DC bus charges the battery through the step-down circuit. When the battery is discharged, the battery supplies power to the DC bus through the boost circuit and the balance bridge, and the circuit structure is complicated. Contents of the invention [0004] In view of this, an embodiment of t...
Claims
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Login to View More IPC IPC(8): H02M3/158H02J7/00H02J9/06
Inventor 陈海飞陈威龙赵晨黄金林
Owner KEHUA DATA CO LTD