直流调制单级功率因数校正交-交变流器(英文)

Investigation of DC-Modulated Single-Stage Power Factor Correction AC/AC Converters

功率因数校正是产生或吸收无功功率力图达到功率因数等于1。单级交-交变流器被广泛应用在各工业领域。传统的交-交变流器采用电压调制法,全谐畸变高,功率因数低,功率转换效率差。本文介绍全新直流调制方法,由直流变流技术实现。直流调制单级功率因数校正交-交变流器有效地改进了功率因数,使之达到0.999,功率转换效率达到97.8%。实验结果证实了设计和计算的正确性。

Power factor correction （PFC） is the capacity of generating or absorbing the reactive power produced by a load for possible unity power factor. Single-stage AC/AC converters are the most popular structure widely applied in various industrial applications. These AC/AC converters are traditionally implemented by voltage regulation technique. However, they have high total harmonic distortion （THD）, low power factor （PF） and poor power transfer efficiency （η）. In this paper, a novel approach method named DC-modulation that implements DC/DC conversion technology into the AC/AC converters is introduced. The DC-modulated single-stage power factor correction AC/AC converters effectively improve the power factor up to 0.999 and the power transfer efficiency up to 97.8%. The experimental results verify our design and calculation. This technique will be widely applied in many industrial applications.