Title :
Average current mode control of series-switching post-regulators used in power factor correctors
Author :
Villegas, Pedro José ; Sebastián, Javier ; Hernando, Marta ; Nuno, Fernando ; Martínez, Juan Angel
Author_Institution :
Dept. de Eng. Electr., Electron. de Comput. y Sistemas, Oviedo Univ., Spain
fDate :
9/1/2000 12:00:00 AM
Abstract :
The application of the average current mode control (ACMC) to a new type of very efficient post-regulator is studied in this paper. This post-regulator, called series-switching post-regulator (SSR), has been proposed to improve the dynamic response series-switching of power factor correctors (PFC), The post-regulator exhibits very high efficiency due to the fact that only a part of the total power undergoes a power conversion process. Using ACMC, the bandwidth of the post-regulator increases in relation to the one obtained when a conventional voltage-mode control (with or without feedforward) is used. As a result, the attenuation of the input voltage ripple (100-120 Hz) increases and, a lower bulk capacitor can be used to obtain a low voltage ripple at the output, which is extremely important when a battery is connected at the output. This is rather common in distributed power supply systems
Keywords :
dynamic response; electric current control; power factor correction; power supplies to apparatus; rectifying circuits; switching circuits; voltage control; 100 to 120 Hz; average current mode control; bulk capacitor; distributed power supply systems; dynamic response series-switching; feedforward; high quality rectifiers; input voltage ripple attenuation; power factor correctors; series-switching post-regulators; voltage-mode control; Attenuation; Bandwidth; Capacitors; DC-DC power converters; Power conversion; Power supplies; Reactive power; Stress; Topology; Voltage control;
Journal_Title :
Power Electronics, IEEE Transactions on
