A Ship Cathodic Protection Isolated Switching Power Converter from Shore Power
A switching power supply and cathodic protection technology, applied in the direction of regulating electrical variables, high-efficiency power electronic conversion, conversion of DC power input to DC power output, etc. problem, to achieve the effect of improving output power level, reducing loss and high conversion efficiency
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Embodiment 1
[0072] according to figure 1 As shown in the electrical principle topology diagram, a cathodic protection isolated switching power supply converter with an output power of 60W and an output voltage of 24V is designed. The switching power converter parameter is the input voltage V In =250V, output power V Out =60W, output voltage 24V, excitation inductance L m It is 600μH, the resonant inductance is 15μH, the DC blocking capacitor is 3.5μF, the switching frequency is 80kHz, and the output filter capacitor is 480μF.
[0073] The driving voltage V of the switching tube is detected by an oscilloscope and other instruments. gs , Switch drain-source voltage V ds , Resonant inductor current i Lr and the secondary rectifier tube current i Dr and voltage V Dr the experimental waveform. The voltage stress of all switch tubes is clamped at the input voltage, and the zvs conduction of all switch tubes is realized. Resonant inductor current i Lr The reverse peak value is much sma...
Embodiment 2
[0076] according to figure 1 As shown in the electrical principle topology diagram, a cathodic protection isolated switching power supply converter with an output power of 48W and an output voltage of 12V is designed. The switching power converter parameter is the input voltage V In =130V, output power V Out =48W, output voltage 12V, excitation inductance L m It is 600μH, the resonant inductance is 15μH, the DC blocking capacitor is 3.5μF, the switching frequency is 65kHz, and the output filter capacitor is 480μF.
[0077] The driving voltage V of the switching tube is detected by an oscilloscope and other instruments. gs , Switch drain-source voltage V ds , Resonant inductor current i Lr and the secondary rectifier tube current i Dr and voltage V Dr the experimental waveform. The voltage stress of all switch tubes is clamped at the input voltage, and the zvs conduction of all switch tubes is realized. Resonant inductor current i Lr The reverse peak value is much sma...
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