Single-stage input current shaping technique with voltage-doubler rectifier front-end

Publication Date
2000-11-14Filing Date
1998-12-19Inventor
Lee, Fred C.
Jovanovic, Milan M.
Huber, Laszlo
Zhang, Jindong Henry
Metadata
Show full item recordAbstract
A single-stage input-current-shaping (S.sup.2 ICS) converter of the present invention integrates a voltage-doubler-rectifier front-end with a DC/DC output stage. Two families of voltage-doubler S.sup.2 ICS converters are disclosed. In one family, a 2-terminal dither source is provided between a boost inductor and a common input terminal of a storage capacitor and the DC/DC output stage. The 2-terminal dither source includes two paths connected in parallel: a first path for charging and a second path for discharging the boost inductor at a high frequency (HF). In the other family, a 3-terminal dither source includes a third terminal coupled to a pulsating node of the DC/DC output stage. In the 3-terminal dither source, the HF charging path of the boost inductor is coupled between the boost inductor and the pulsating node of the DC/DC output stage, while the HF discharging path of the boost inductor is coupled between the boost inductor and the common input terminal of the storage capacitor and the DC/DC output stage. Due to the voltage-doubler-rectifier front-end, reduction of line-current harmonics can be achieved with a higher conversion efficiency, as compared to a corresponding S.sup.2 ICS converter with a conventional full-bridge rectifier. In addition, a converter of the present invention requires storage capacitors of a lower voltage rating and a smaller total capacitance than the conventional S.sup.2 ICS counterpart. The present invention thereby reduces the size and the cost of the power supply.
Assignee
Virginia Tech Intellectual Properties, Inc.
Delta Electronics, Inc.
Patent Number
6147882
Application Number
9215758
Primary/U.S. Class
363/39
Other/U.S. Class
363/17
363/20
363/61
363/143
CPC Class
H02M1/4258
H02M1/10
Y02B70/126
Patent Type
utility
Collections
- Virginia Tech Patents [687]