Switching power supply, electrical isolation method and multi-meter concentrated reading communication device

Abstract

The embodiments of the invention provide a switching power supply, an electrical isolation method and a multi-meter concentrated reading communication device. The switching power supply comprises a control circuit and a transformer; an external power supply is coupled with a primary coil of the transformer, the primary coil of the transformer is coupled with the control circuit, the transformer has a plurality of secondary coils, and each secondary coil of the transformer is coupled with the primary coil of the transformer; and each secondary coil of the transformer is coupled with an external load. The transformer is used for adjusting the input voltage of the external power supply into multiple voltage signals via the electromagnetic effect of the primary coil and the plurality of secondary coils thereof, and outputting each voltage signal to the load, so as to electrically isolate the external power supply from the loads. 4KV electrical isolation between the external power supply and the loads is realized by the electrical isolation between the primary coil and the plurality of secondary coils of the transformer. 4KV electrical isolation between the loads is realized by the electrical isolation between the secondary coils of the transformer.

Description

technical field [0001] The invention relates to the field of electrical technology, in particular to a switching power supply, an electrical isolation method, and a multi-meter centralized reading communication device. Background technique [0002] With the development and improvement of science and technology, remote meter reading and monitoring through the electric power centralized reading platform in the existing electric meter technology have been widely used, but water meters, gas meters and heat meters still need to be read manually or Remote meter reading system (Symphonic Mbus, MBUS) for centralized reading. Manual meter reading has the disadvantages of high labor intensity, low efficiency and high cost. The Mbus meter reading method not only needs to be rewired, but also because it is incompatible with the meter reading method of the electric meter, it needs to be converted by a conversion circuit to realize multi-meter centralized reading. However, in the conver...

AI Technical Summary

Problems solved by technology

However, in the conversion circuit of the prior art, the volume and weight of the conversion circuit are large, the conversion efficiency is low, the power consumption is high, and the anti-interference performance and insulation performance between the circuits of the conversion circuit are poor.

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