Low-power consumption standby circuit of power-frequency power supply transformer

Abstract

The invention is applicable to the field of energy conservation of transformers and provides a low-power consumption standby circuit of a power-frequency power supply transformer. The circuit comprises an impedance module, a switch control module and a photoelectric isolation module, wherein the impedance module is connected with the switch control module; the switch control module is also connected with the photoelectric isolation module; and when the transformer is connected, the switch control module is connected with the primary winding of the power-frequency power supply transformer, and the photoelectric isolation module is connected with the secondary winding of the power-frequency power supply transformer. Due to the adoption of an electric-optical-electric control way, the energy conversion efficiency is relatively high. A photodiode can enter a standby mode by only relatively low current, so the energy consumed by the circuit is low, and micro-power consumption standby is realized. The same power-frequency power supply transformer is adopted in both the standby mode and the work mode, so the cost is greatly reduced, and the circuit is very simple in structure, so the reliability of the circuit is improved.

Description

technical field [0001] The invention belongs to the field of transformer power saving, and in particular relates to a low-power standby circuit of an industrial frequency power transformer. Background technique [0002] In electrical appliances using industrial frequency power transformers, the working modes of the power supply include standby state and power-on state. At present, the standby power consumption of the whole machine is generally 2W-10W. For the standby power consumption of the whole machine, countries around the world have issued different technical requirements. The latest environmental protection index in Europe is: the technical requirement for energy-using products (EuP) in 2013 is less than 0.5W. my country has also put forward corresponding indicators for the standby power consumption of the whole power supply in the energy-saving certification. In order to reduce the standby power consumption of the whole machine during standby, the following three ci...

AI Technical Summary

Problems solved by technology

When this solution is adopted, its cost is high, and there will be electromagnetic interference during standby, which will affect the performance of surrounding electrical appliances and the performance of its own products

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