Abstract
A high efficiency full-bridge converter is investigated and implemented in this paper. The measured data result from the other converter implemented by IC UCC3895 is to compare with that of the previous converter. This full-bridge converter proposed and implemented converter can obtain about 96% power efficiency in conversion procedure when compared with that of 90%, which were ever published by the conventional techniques. Apart from, the L-C resonance circuits were developed and embedded into the popular PWM (pulse width modulation) power converter, which is referred as the soft-switching, so as to down sizing the volume of the IC which can totally reduces the power losses caused in the duration of a semi-con- ductor switching.
Highlights
It is known that the “hardware switching” has become as “soft-switching” in the power electronic system, this is corresponding to the power transfer techniques has transmitted from PWM to switching schemes [1,2,3]
The measured data result from the other converter implemented by IC UCC3895 is to compare with that of the previous converter. This full-bridge converter proposed and implemented converter can obtain about 96% power efficiency in conversion procedure when compared with that of 90%, which were ever published by the conventional techniques
This fact describes that the soft switching technique definitely can be employed to improve the problem of switching power losses, 3) in terms of solving the critical issue of conduction losses caused by the rectifying diode with heavy loading, the ISL6754 converter illustrates more significant in improving the power efficiency than that of UCC3895, since the former one own the converter has the ability of synchronizing rectifier
Summary
It is known that the “hardware switching” has become as “soft-switching” in the power electronic system, this is corresponding to the power transfer techniques has transmitted from PWM to switching schemes [1,2,3]. The line winding loses caused at the secondary side of a high frequency transformer and the post-stage rectifier diode during the conversion interval [11] These transmission losses are equivalent to the production of forward voltage and forward current. The reasons for selecting this conversion device are that it can be adopted in several field of the power supply developing, such as power for telecommunication and information, power of base station, power of file server, and even power of industry It can either obtain null voltage between switching state when applied in the pre-stage control or it can applied in the post-stage for controlling a transistor to act as a rectifier. The implementing results shown that the total efficiency can be reach approximate above 90% when the loading is within the interval of 120 W - 720 W without large power losses Such a high efficiency power converter implemented with synchronization rectifier.
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