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Voltage method-based mains supply automatic switching device

An automatic switching, voltage method technology, applied in the output power conversion device, conversion equipment that can be converted to DC without intermediate conversion, electrical components, etc. Normal and other problems, to achieve the effect of improving reliability and safety, wide application prospects, and high practical value

Active Publication Date: 2018-06-05
CHANGZHOU TONGHUI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solution provided by this patent is to manually switch the switch. On the one hand, it is easy to cause the instrument to work abnormally due to misoperation, or the measuring instrument is damaged due to excessive voltage; Personnel get an electric shock, endangering the personal safety of the operator

Method used

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  • Voltage method-based mains supply automatic switching device
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  • Voltage method-based mains supply automatic switching device

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Embodiment Construction

[0020] The present invention will now be described in further detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0021] Such as figure 2 As shown, a mains automatic switching device based on the voltage method includes a first transformer, a rectification filter, a control circuit, a voltage adjustment circuit, a switching circuit, and a second transformer. The first transformer is a single-phase power frequency step-down transformer, with a single set of input and a single set of output; the control circuit consists of two parts, the first part is the voltage identification part, the second part is the logic judgment part, and the voltage recognition part is used to judge Input the magnitude of the mains voltage, and the logic judgm...

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PUM

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Abstract

The invention relates to a voltage method-based mains supply automatic switching device. The voltage method-based mains supply automatic switching device comprises a first transformer, a rectifier filter, a control circuit, a voltage adjusting circuit, a switching circuit and a second transformer. The amplitude of the voltage of the mains supply is judged through a voltage identification circuit,a single-pole double-throw relay is driven by a logic judgment circuit to realize automatic switching of the voltage of the mains supply, the requirements on the mains supply standard in different countries and regions, the electronic components are the common electronic components which are low in cost and easy to buy, and the reliability and the safety of the instrument are improved relative tothe operation mode of manually switching the voltage of the mains supply, so that high practical value and wide application prospect are achieved.

Description

technical field [0001] The invention relates to the fields of instruments and meters and automatic control, in particular to a commercial power automatic switching device based on a voltage method. Background technique [0002] Linear power supply has the advantages of small ripple and high stability. In all measuring devices powered by linear power supply, in order to convert the mains voltage into a low voltage suitable for output, a power frequency transformer is required. [0003] However, due to the different mains power standards in various countries and regions, such as 100VAC in Japan, 120VAC in Mexico, 127VAC in Morocco, 230VAC in Finland, and 240VAC in Malaysia, considering the undervoltage and overvoltage conditions in reality, the actual range of mains voltage is 90VAC to 260VAC. [0004] Patent CN201120242193.3 "Dual-voltage switchable transformer" is only suitable for the conversion of two voltages, and has limitations in application. [0005] Patent CN2012105...

Claims

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Application Information

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IPC IPC(8): H02M5/10H02M1/10
CPCH02M1/10H02M5/10
Inventor 赵浩华高志齐苏金锋王怒江泽梧赵志坚
Owner CHANGZHOU TONGHUI ELECTRONICS
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