Title :
Soft-switched high power factor boost type AC/DC converter and its fundamental analysis
Author :
Nagao, Michihiko ; Harada, Koosuke
Author_Institution :
Energy Electron. Lab., Kumamoto Inst. of Technol., Japan
Abstract :
By a combination of a lossless snubber and a sensor for the current or voltage, soft-switched high power factor AC/DC converters are realized by a simple circuit construction. These converters need twice the input peak voltage for soft switching. In this paper, a new technique to spread the range of the soft switching is proposed. To derive circuit characteristics such as the power factor and output voltage as functions of the circuit parameters, a nonlinear differential equation for the output voltage is given and solved under the proper assumptions. These analytical results are then verified by the experiments
Keywords :
AC-DC power convertors; harmonic distortion; nonlinear differential equations; power conversion harmonics; power factor correction; rectifying circuits; snubbers; switching circuits; circuit characteristics; current sensor; fundamental analysis; lossless snubber; nonlinear differential equation; output voltage; power factor; simple circuit construction; soft switching range; soft-switched high-power factor boost-type AC/DC power converter; voltage sensor; Capacitors; Circuits; Current transformers; DC-DC power converters; Inductors; Reactive power; Snubbers; Switches; Switching converters; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1999. PESC 99. 30th Annual IEEE
Conference_Location :
Charleston, SC
Print_ISBN :
0-7803-5421-4
DOI :
10.1109/PESC.1999.785583
