直流调制单级功率因数校正交-交变流器

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.

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

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.