A Three-Phase Zero-Voltage and Zero-Current Switching DC–DC Converter for Fuel Cell A
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31-12-2010, 05:28 PM

.doc   A Three phase ZV ZC Sw DC-DC Fuel Cell.doc (Size: 33.5 KB / Downloads: 75)


Aim Of the Project Is Get the Energy From non conventional Energy Source To Convert 400v 3phase Energy. Using 3phase Zv ZC Switching Dc-Dc Convert For Fuel Cell Application.

In spite of having many advantages, such as low
switch voltage and easy implementation, the voltage-fed dc–dc
converter has been suffering from problems associated with large transformer leakage inductance due to high transformer turn ratio when it is applied to low-voltage, high-current step-up application such as fuel cells. This paper proposes a new three-phase voltagefed dc–dc converter, which is suitable for low-voltage, high-current applications. The transformer turn ratio is reduced to half owing to Δ-Y connection. The zero-voltage and zero-current switching (ZVZCS) for all switches are achieved over wide load range without affecting effective duty cycle. A clamp circuit not only clamps the surge voltage but also reduces the circulation current flowing in the high-current side, resulting in significantly reduced conduction losses. The duty cycle loss can also be compensated by operation of the clamp switch. Experimental waveforms from a 1.5 kW prototype are provided.


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