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The digital controller of the phase-shift full bridge converter for a server power supply is designed and implemented in this paper. Analog controllers are replaced by single MCU (micro controller unit) that not only manages the protection or the operational flow of a power supply but also controls the converter. Voltage mode controller is designed based on the z-domain small signal model considering...
This system designs a high efficient, low ripple switching power supply. It uses single-ended DC-DC forward converter, and the output range is controlled by regulating the pulse width of the PWM controller UC3844. The control part is called double closed-loop control circuit, composed by voltage feedback loop and current feedback loop. It can stable the output voltage, reduce voltage regulation and...
Wireless sensor networks may be used in the explosion environment, such as underground tunnel in coal mine. In order to assure sensor node work normally, the power of a sensor node must be intrinsic safe. The intrinsic safe power of a sensor node, which consists of power supply module and intrinsic safe protection module, is developed. The power supply mainly consists of current-mode controller chip...
Inductive Power Transfer (IPT) is an efficient and well established technique for contactless or wireless power transfer, and has numerous applications over a wide power range. Although the demand for high power IPT systems is growing, the implementation of such IPT systems is severely hampered by the limitations of voltage and current ratings of available semiconductor devices. This paper presents...
Studies of microtransformer-based switching converters are reviewed in this paper. A multilayered planar device consisting of zigzag-shape coils and Co-Zr amorphous magnetic films is used as the converter's main transformer. A resonant-type microconverter driven at high frequencies (6 MHz) shows excellent characteristics suited to practical applications, including high efficiency (49.5%), high output...
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