Average current mode control of series-switching post-regulatorsused in power factor correctors |
| |
Authors: | Villegas PJ Sebastian J Hernando M Nuno F Martinez JA |
| |
Affiliation: | Dept. de Eng. Electr., Electron. de Comput. y Sistemas, Oviedo Univ.; |
| |
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: | |
|
|