Continuous reactive power compensation in AC lighting supplies - has bridge network with power transistors switched by PWM controller having phase variable control.

摘要

The service free electronic unit for the supply of power provides compensation for the reactive power component. The circuit has a bridge network with MOSFET switching devices bridged by diodes. The bridge connects with an inductance (L) and a capacitor (C) and is also connected with a load capacitor (CL) and an auxiliary DC voltage (UH). The components are sized for 50Hz sine wave oscillation. The bridge is controlled by PWM signals generated by a circuit having an input from a stage that measures the reactive current component and uses this to adjust the phase. ADVANTAGE - Provides economical power generation for AC lighting systems.