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Problem 5 (20%)-A Boost dc-dc converter is operating in DC steady state under the following condition:...
In a Buck-Boost converter, L=25 μΗ. It is operating in dc steady state under the following
In a Buck-Boost converter, \(L=25 \mu \mathrm{H}\). It is operating in dc steady state under the following conditions: \(V_{i n}=12 \mathrm{~V}, D\) \(=0.6, P_{o}=36 \mathrm{~W}\), and \(f_{s}=400 \mathrm{kHz}\). Assume ideal components.In this Buck-Boost converter, the output load is changing. Calculate the critical value of the output load \(P_{o}\) below which the converter will enter the discontinuous conduction mode of operation.(a) Calculate \(I_{\text {L.crit }}\) and \(I_{o, \text { crit }}\)(b) Calculate \(P_{o, \text { crit }}\)
QUESTION 3 In the DC-DC buck-boost converter shown in next page assume that all the components...
QUESTION 3 In the DC-DC buck-boost converter shown in next page assume that all the components are ideal and the converter is operating in continuous conduction mode and is in steady-state (a) Derive the conversion ratio of WI - Draw the circuit diagram when the switch is in on and off states. Use small ripple approximation for your analysis Sketch the current through and the voltage across the inductor when the switch is in on and off states. Include all...
Q5. 5.a. Sketch the circuit arrangement of a DC-DC boost (step up) converter, clearly labelling each...
Q5. 5.a. Sketch the circuit arrangement of a DC-DC boost (step up) converter, clearly labelling each circuit element [4 тarks] [Refer to lecture notes] Sketch all significant operating waveforms for this converter for continuous conduction conditions over two switching periods, in particular showing 5.b. the voltage across the main switching device and the boost diode. [2 marks the voltage across the inductor [3 тarks] the current flowing through the inductor [3 marks [Refer to lecture notes] 5.c. The DC-DC boost...
A PV array with terminal voltage around 48 V under standard conditions is connected to a step-up dc-dc converter to supply a load at 120 V, 5 A. The input inductance is 8 mH with an internal resistanc...
A PV array with terminal voltage around 48 V under standard conditions is connected to a step-up dc-dc converter to supply a load at 120 V, 5 A. The input inductance is 8 mH with an internal resistance of 0.2 ohms, and the switching frequency is 5 kHz. Assuming ideal circuit components, calculate the duty ratio (k) and average input current (I1). Evaluate the maximum peak-to-peak input current ripple for the converter. If this current is limited to 2% of...
A buck converter is operating in the steady state with an input voltage of = 42 V dc, D = 0.3, ou...
A buck converter is operating in the steady state with an input voltage of = 42 V dc, D = 0.3, output power of 24 W, an inductance of 25 H and a switching frequency of 400 kHz. Draw the input current, inductor current, inductor voltage, and capacitor current waveforms. Assume the dc component of the inductor current flows through to the load and the ac component of the inductor current flows through the capacitor. Assume ideal circuit components.
Problem 1: (40 points) A boost converter based power factor correction circuit needs to operate with...
Problem 1: (40 points) A boost converter based power factor correction circuit needs to operate with universal input voltage, i.e the input voltage can be either 120V (RMS)+/- 10% at 60 Hz or 240 V(RMS) +/- 10% at 50 Hz. The output voltage is regulated at 400 V DC and the maximum (average) output power is 1kW. The switching frequency is 200 kHz. (a) Calculate the value of inductance needed to keep its peak peak ripple current to be less...
Following figure shows the circuit diagram for a buck-boost converter for switch off and switch o...
Following figure shows the circuit diagram for a buck-boost converter for switch off and switch on. The plots for inductor voltage Vl and inductor current iL are also shown. The average value of i, is denoted by I1, average output current is -l and average input current is ld. Similarly, the average value of u1 is denoted by V1, output voltage is-, and input DC voltage is Va. Time period of the switch is Ts 1/f and its duty cycle...
Please answer if you can do all the parts. Rating will be provided. A DCM boost...
Please answer if you can do all the parts. Rating will be
provided.
A DCM boost converter is to be designed to operate under the following conditions. 18 V V36 V 5 W Pout < 100 W Vo =48 V fs = 150 kHz You may assume that there is a mechanism which automatically varies the duty ratio to maintain the output voltage constant at 48 V. Design the converter subject to the following conditions The converter must operate in...
QUESTION 3 In the DC-DC buck-boost converter shown in next page assume that all the components are ideal and the converter is operating in continuous conduction mode and is in steady-state (a) Derive the conversion ratio of WI - Draw the circuit diagram when the switch is in on and off states. Use small ripple approximation for your analysis Sketch the current through and the voltage across the inductor when the switch is in on and off states. Include all...
Q5. 5.a. Sketch the circuit arrangement of a DC-DC boost (step up) converter, clearly labelling each circuit element [4 тarks] [Refer to lecture notes] Sketch all significant operating waveforms for this converter for continuous conduction conditions over two switching periods, in particular showing 5.b. the voltage across the main switching device and the boost diode. [2 marks the voltage across the inductor [3 тarks] the current flowing through the inductor [3 marks [Refer to lecture notes] 5.c. The DC-DC boost...
Problem 1: (40 points) A boost converter based power factor correction circuit needs to operate with universal input voltage, i.e the input voltage can be either 120V (RMS)+/- 10% at 60 Hz or 240 V(RMS) +/- 10% at 50 Hz. The output voltage is regulated at 400 V DC and the maximum (average) output power is 1kW. The switching frequency is 200 kHz. (a) Calculate the value of inductance needed to keep its peak peak ripple current to be less...
Following figure shows the circuit diagram for a buck-boost converter for switch off and switch on. The plots for inductor voltage Vl and inductor current iL are also shown. The average value of i, is denoted by I1, average output current is -l and average input current is ld. Similarly, the average value of u1 is denoted by V1, output voltage is-, and input DC voltage is Va. Time period of the switch is Ts 1/f and its duty cycle...
Please answer if you can do all the parts. Rating will be
provided.
A DCM boost converter is to be designed to operate under the following conditions. 18 V V36 V 5 W Pout < 100 W Vo =48 V fs = 150 kHz You may assume that there is a mechanism which automatically varies the duty ratio to maintain the output voltage constant at 48 V. Design the converter subject to the following conditions The converter must operate in...
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