Power supply switching device
A technology of power switching and AC power supply, which is applied in the direction of circuit devices, emergency power arrangements, electrical components, etc.
Inactive Publication Date: 2011-06-22
SHENZHEN INST OF ADVANCED TECH
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- Description
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Problems solved by technology
This type of automatic transfer switch can only be used to switch between two power sources of the same nature, that is, an AC switch is used when the two power sources are AC, and a DC switch is used when the two power sources are DC.
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[0016] figure 1 is a schematic diagram of a power switching device. exist figure 1 In , the solid line represents the current signal, and the dotted line represents the control signal. The power switching device includes a DC power input terminal 12, an AC power input terminal 13, an output terminal 14, a communication port 15, an AC electronic switch, a first current transformer, a first voltage transformer, a second voltage transformer, a DC electronic switch, Inverter, second current transformer, pulse trigger, programmable controller, display unit. The input terminal 13 of the AC power supply is connected to the output terminal 14 through the AC electronic switch, the first current transformer, and the first voltage transformer in sequence, that is, an AC branch circuit is formed. The input end 12 of the DC power supply is connected to the output end 14 through the second voltage transformer, the DC electronic switch, the inverter, the second current transformer, and th...
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The invention relates to a power supply switching device, which is characterized in that an alternating current (AC) power supply input end is connected with an output end by an AC electronic switch, a first current transformer and a first voltage transformer in sequence to form an AC branch; a direct current (DC) power supply input end is connected with an output end by a second voltage transformer, a DC electronic switch, an inverter, a second current transformer and the first voltage transformer in sequence to form a DC branch; and a control unit is used for receiving information sent by the first current transformer, the first voltage transformer, the second voltage transformer and the second current transformer and processing the received information as well as controlling switch-on and switch-off of the DC electronic switch, the AC current electronic switch and the inverter. The power supply switching device can be switched between an AC power supply and a DC power supply; and the AC branch and the DC branch can not be conducted at the same time, thus different power supplies can be selected to supply power for loads in accordance with actual conditions, thereby realizing that the power utilization cost is the lowest and the efficiency is the best.
Description
【Technical field】 [0001] The invention relates to a power switching device. 【Background technique】 [0002] At present, the automatic transfer switching appliances on the market generally have two power supply input terminals and one power supply output terminal. This type of automatic transfer switch can only be used to switch between two power sources of the same nature, that is, an AC switch is used when the two power sources are AC, and a DC switch is used when the two power sources are DC. [0003] In practical applications, there are many places where electricity is used. One of the common power sources and the backup power source is AC power, and the other is DC power. Power switching device. 【Content of invention】 [0004] In view of this, it is necessary to provide a power switching device capable of switching between an AC power supply and a DC power supply to address the above problems. [0005] A power switching device, comprising a DC power input terminal, ...
Claims
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Inventor 杨朋李磊
Owner SHENZHEN INST OF ADVANCED TECH