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Fault Detection Method of Common Bus Circuit

A fault detection, common bus technology, applied in the direction of measuring devices, measuring electrical variables, measuring current/voltage, etc., can solve the problem that the power supply module cannot supply power normally, and achieve the effect of reducing the number of maintenance

Active Publication Date: 2021-03-16
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defect that all power supply modules on the bus cannot supply power normally when multiple power supply modules work together, the present invention proposes a common bus circuit and its fault detection method

Method used

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  • Fault Detection Method of Common Bus Circuit
  • Fault Detection Method of Common Bus Circuit
  • Fault Detection Method of Common Bus Circuit

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Embodiment Construction

[0021] like figure 2 As shown, the common busbar circuit proposed by the present invention includes a plurality of power supply sources and loads, the power supply sources and loads are connected to the busbar in parallel, each power supply source is equipped with a switch device connected in series on the busbar, and the power supply source is controlled by the switch device. The line it is on is connected to or disconnected from the bus.

[0022] The power supply is connected to the busbar in sequence from front to back, a switch device is arranged between two adjacent power supplies, and the switch device adopts a contactor, so as to automatically control the closing or opening of the switch device. The position where the power supply is connected on the bus is the access point, and the switch device is connected in series on the front side or the rear side of the access point corresponding to the power supply. In a preferred embodiment, the bus is a DC bus, the power supp...

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PUM

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Abstract

The invention discloses a common bus circuit and a fault detection method thereof. The common bus circuit includes: a common bus circuit and a load; wherein the power supply and the load are connectedto the bus in parallel; each power supply is provided with a switching device connected to the bus in series, each power supply is further provided with a voltage detection point connected to the bus, each voltage detection point is connected between the corresponding power supply and the corresponding switching device in series, and a circuit where the corresponding power supply is located is controlled to be disconnected or connected with the bus through the corresponding switching device. According to the common bus circuit, a faulted line can be separated from the bus when the circuit isfaulted, so that other modules can work normally, and the maintenance frequency of frequent fault shutdown of the power supply circuit is reduced.

Description

technical field [0001] The invention relates to the technical field of power supply circuits, in particular to a common bus circuit and a fault detection method thereof. Background technique [0002] Existing AC-DC power supply and DC-DC power supply are generally modularized. Due to the fixed capacity of power supply modules, multiple power supply modules need to work in parallel in large-capacity scenarios, which brings a series of problems of DC bus sharing, including busbar short-circuit faults. . like figure 1 As shown in the figure, when multiple power modules work together, if the bus fails, all the power modules on the bus will not be able to supply power normally, resulting in all the loads on the bus will not work normally, and the circuit will fail frequently, requiring a lot of manpower to maintain, seriously affecting Use experience. Moreover, the power supply circuit of the existing multi-power module is not provided with an effective protection structure, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J1/10G01R19/165
CPCG01R19/16538H02J1/10
Inventor 刘帅蒋世用刘克勤王京
Owner GREE ELECTRIC APPLIANCES INC