(a) Derive expressions for the peak tank capacitor voltage and peak tank inductor current. (b) Select values for the tank inductance, tank capacitance, and turns ratio, such that the given spec- ifications are met. Attempt to minimize the peak tank inductor current, while maximizing the worst-case minimum switching frequency.

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A series resonant de-dc converter operates with a dc input voltage of V = 550 V. The converter supplies
30 kV to a load. The de load power varies over the range 5 kW to 25 kW. It is desired to operate the
power transistors with zero-voltage switching. The maximum feasible switching frequency is 50 kHz.
An isolation transformer having a 1:n turns ratio is connected in series with the tank network. The peak
tank capacitor voltage should be no greater than 2000 V, referred to the primary.
(a)
Derive expressions for the peak tank capacitor voltage and peak tank inductor current.
(b)
Select values for the tank inductance, tank capacitance, and turns ratio, such that the given spec-
ifications are met. Attempt to minimize the peak tank inductor current, while maximizing the
worst-case minimum switching frequency.
Transcribed Image Text:A series resonant de-dc converter operates with a dc input voltage of V = 550 V. The converter supplies 30 kV to a load. The de load power varies over the range 5 kW to 25 kW. It is desired to operate the power transistors with zero-voltage switching. The maximum feasible switching frequency is 50 kHz. An isolation transformer having a 1:n turns ratio is connected in series with the tank network. The peak tank capacitor voltage should be no greater than 2000 V, referred to the primary. (a) Derive expressions for the peak tank capacitor voltage and peak tank inductor current. (b) Select values for the tank inductance, tank capacitance, and turns ratio, such that the given spec- ifications are met. Attempt to minimize the peak tank inductor current, while maximizing the worst-case minimum switching frequency.
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