Title :
Flyback-based PFC converter with sinusoidal output for use in AC UPS
Author :
Hoyo, J. ; Arau, J. ; Aguilar, C. ; Martinez, E.
Author_Institution :
Electron. Eng. Dept., CENIDET, Morelos, Mexico
Abstract :
Nowadays, the number of sensitive loads connected to the utility line increases fast. These loads need a highly reliable power supply. One way to provide this kind of energy is using an uninterruptible power supply (UPS). Basically, a UPS providing input power factor correction (PFC) is a three stage system: PFC stage, DC-DC converter stage and inverter stage. The approach proposed eliminates the DC-DC converter stage and removes the bulk capacitor of the PFC stage to use the natural output waveform of the converter before filtering: a semisinusoidal waveform. This allows the inverter stage working at low frequency with high efficiency. The PFC stage is based on a flyback topology operating in DCM to have a simple control loop.
Keywords :
DC-DC power convertors; invertors; power factor correction; uninterruptible power supplies; 127 V; 200 W; 70 to 140 V; 75 kHz; AC UPS; DC-DC converter stage; Flyback-based PFC converter; PFC stage; high efficiency; input power factor correction; inverter stage; natural output waveform; reliable power supply; semisinusoidal waveform; sensitive load; sinusoidal output; uninterruptible power supply; Capacitors; DC-DC power converters; Filtering; Frequency; Inverters; Power factor correction; Power supplies; Power system reliability; Topology; Uninterruptible power systems;
Conference_Titel :
Power Electronics Congress, 2002. Technical Proceedings. CIEP 2002. VIII IEEE International
Print_ISBN :
0-7803-7640-4
DOI :
10.1109/CIEP.2002.1216656
