Apparatus For Protecting Direct Current Branch Circuit

A protection device, DC branch technology, applied in the direction of DC network circuit device, emergency protection circuit device, emergency protection device, etc., can solve the problems of low expansion ability, poor flexibility, and the number of circuits is not easy to change, etc.

Inactive Publication Date: 2012-11-28
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In the power supply unit 101 described above, there is a problem of low expandability or poor flexibility because a predetermined number of circuit protectors CP1-CP3 are previously built in, so that the number of branches is fixed and the number of circuits is not easily changed

Method used

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  • Apparatus For Protecting Direct Current Branch Circuit
  • Apparatus For Protecting Direct Current Branch Circuit
  • Apparatus For Protecting Direct Current Branch Circuit

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Embodiment Construction

[0026] Now, embodiments of the present invention will be described with reference to the drawings.

[0027] In recent years, reduction of greenhouse gas emissions has been demanded as a measure against global warming. In addition, in the civil affairs department, it is proposed to reduce electricity consumption in order to reduce carbon dioxide emissions from energy sources.

[0028] Various home appliances are used in general households, and currently, many home appliances are driven by an AC power source. Therefore, home appliances in every ordinary home are operated by supplying each home with AC power from a power company. On the other hand, there are more and more devices in the field of home appliances such as air conditioners, refrigerators, washing machines, etc., and each device uses an inverter control system. In inverter-controlled type appliances, AC power from an indoor outlet is converted into DC power by a built-in AC / DC converter, and then inverted into AC by...

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Abstract

In an alternating current distribution board, circuit breakers (5) and a controller (6) are housed as internal devices, wherein: each of the respective circuit breakers (5) is provided for a corresponding one of branch lines into which master wiring for a direct current power supply branches; and the controller (6) controls opening and closing of the respective circuit breakers (5). Each of the circuit breakers (5) comprises: power supply side connection terminals (t1 and t2) connected to the master wiring; load side connection terminals (t3 and t4) to which wiring on the load side is connected; a semiconductor switching element (57) provided in the middle of an electrical path connecting the power supply side connection terminals (t1 and t2) to the load side connection terminals (t3 and t4); a current detecting resistance (56), which detects a current flowing in the electrical path; and an arithmetic circuit (60), which opens and closes the semiconductor switching element (57) in accordance with opening and closing control signals inputted from the controller (6), and which forcibly closes the semiconductor switching element (57) when a current value obtained based on a voltage across the current detecting resistance (56) exceeds a set current.

Description

technical field [0001] The invention relates to a direct current (DC) branch circuit protection device. Background technique [0002] Such as Figure 5 As shown in A, there is a power supply device 100 which, as a conventional power supply device equipped with a protection function for protecting a load from overcurrent, is provided with a fuse F along an output terminal of a constant voltage source E, Wherein, the loads L1-L4 are connected in parallel with the constant voltage source E through the switches S1-S4 respectively. [0003] In this power supply device 100, since the loads L1-L4 are protected from overcurrent using the fuse F connected along the output terminal of the constant voltage source E, there is The problem that the power of L1-L4 is cut off. [0004] Therefore, in order to protect each load of a branch circuit from overcurrent, a conventional power supply device 101 is provided with a multipoint connector 102 connected to a plurality of load circuits, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02B1/40H01H73/02H02H3/087H02J1/00
CPCH02H7/26H01H71/123H02J1/06H02H3/087H02H3/10
Inventor 忠泽孝明小新博昭
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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