Single fire-wire phase-front dynamic AC power fetching module

摘要

An AC live-wire, zero-crossing chopping power supply for a load, such as a control circuit or other auxiliary load, comprises two series-connected type synchronous power chopping circuits 1 connected in parallel, and an electronic switch 2 connected thereto. One circuit is used to perform positive phase AC power chopping, while the other performs negative phase AC power chopping. The electronic switch may formed by a relay or a silicon control crystal (TRIAC) controlled by an MCU microprocessor. The duration of power chopping can be regulated automatically depending on the load. The load may be a wireless communication module 3 for a device such as a lamp.