Q1: A buck converter is supplied from a 50V battery source. Given: L=400uH, C=100UF, R=20 Ohm, f=20KHZ and D=0.4, Calculate: (a) output voltage (b) maximum and minimum inductor current, (c) output voltage ripple.

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Q1: A buck converter is supplied from a 50V battery source.
Given: L=400uH, C=100uF, R=20 Ohm, f=20KHZ and D=0.4,
Calculate:
(a) output voltage
(b) maximum and minimum inductor current,
(c) output voltage ripple.
Q2: A buck converter has an input voltage of 50V and output of 25V. The switching
frequency is 10KHZ. The power output is 125W.
Determine
(a)the duty cycle,
(b) the value of L to limit the peak inductor current to 6.25A,
(c) the value of capacitance to limit the output voltage ripple factor to 0.5%.
Q3: Design a buck converter such that the output voltage is 28V when the input is 48v.
The load is 80hm.
(a)Design the converter such that it will be in continuous current mode.
(b)The capacitance realized output voltage ripple must not be more than 0.5%.
(c) The inductance that limits the current ripples within 30%
(d) Select the appropriate power switch also.
Q4: Design a buck converter such that the output voltage varies between from 20V to 28V
while the input voltage is 40V. The maximum load power is 200Wde. Assume the switching
frequency is 15kHz.
(a) Design the converter such that it will be in continuous current mode.
(b) The capacitor realized output voltage ripple must not be more than 1% at worst case.
(c) The inductance realizes CCM at worst case.
(d) Select the appropriate switch and other elements...
Q5:The boost converter has the following parameters: Vd=20V, D=0.6, R=12.50, L=65uH, C=200UF,
fs=40KHZ.
Determine
(a)output voltage,
(b) average, maximum and minimum inductor current,
(c) output voltage ripple.
Q6: Design a boost converter to provide an output voltage of 36V from a 24V source. The load is
50w. The voltage ripple factor must be less than 0.5%.
(a)Specify the duty cycle ratio,
(b)lnductor and capacitor size,
(c)and power device.
Transcribed Image Text:Q1: A buck converter is supplied from a 50V battery source. Given: L=400uH, C=100uF, R=20 Ohm, f=20KHZ and D=0.4, Calculate: (a) output voltage (b) maximum and minimum inductor current, (c) output voltage ripple. Q2: A buck converter has an input voltage of 50V and output of 25V. The switching frequency is 10KHZ. The power output is 125W. Determine (a)the duty cycle, (b) the value of L to limit the peak inductor current to 6.25A, (c) the value of capacitance to limit the output voltage ripple factor to 0.5%. Q3: Design a buck converter such that the output voltage is 28V when the input is 48v. The load is 80hm. (a)Design the converter such that it will be in continuous current mode. (b)The capacitance realized output voltage ripple must not be more than 0.5%. (c) The inductance that limits the current ripples within 30% (d) Select the appropriate power switch also. Q4: Design a buck converter such that the output voltage varies between from 20V to 28V while the input voltage is 40V. The maximum load power is 200Wde. Assume the switching frequency is 15kHz. (a) Design the converter such that it will be in continuous current mode. (b) The capacitor realized output voltage ripple must not be more than 1% at worst case. (c) The inductance realizes CCM at worst case. (d) Select the appropriate switch and other elements... Q5:The boost converter has the following parameters: Vd=20V, D=0.6, R=12.50, L=65uH, C=200UF, fs=40KHZ. Determine (a)output voltage, (b) average, maximum and minimum inductor current, (c) output voltage ripple. Q6: Design a boost converter to provide an output voltage of 36V from a 24V source. The load is 50w. The voltage ripple factor must be less than 0.5%. (a)Specify the duty cycle ratio, (b)lnductor and capacitor size, (c)and power device.
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