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A buck converter, as shown in Figure $$(a)$$ below, is working in steady state. The output voltage and the inductor curr...
GATE EE 2016 Set 1
In the following chopper, the duty ratio of switch $$S$$ is $$0.4.$$ If the inductor and capacitor are sufficiently larg...
GATE EE 2015 Set 1
A step-up chopper is used to feed a load at $$400$$ $$V$$ $$dc$$ from a $$250$$ $$V$$ $$dc$$ source. The inductor curren...
GATE EE 2014 Set 2
The power electronic converter shown in the figure has a single-pole double-throw switch. The pole $$P$$ of the switch i...
GATE EE 2010
A step down chopper is operated in the continuous conduction mode in steady state with a constant duty ratio $$D.$$ If $... GATE EE 2002 In a thyristor $$dc$$ chopper which type of commutation results in best performance? GATE EE 1996 A $$dc$$ to $$dc$$ transistor chopper supplied from a fixed voltage $$dc$$ source feeds a fixed resistive-inductive load... GATE EE 1995 Consider the chopper circuit of figure. The chopper operates at $$400$$ $$Hz$$ and $$50$$% duty cycle. The load current... GATE EE 1995 Match the following List $$-$$ $${\rm I}$$ $$A.$$ Commutation $$B.$$ $$V$$ $$-$$ Curves $$C.$$ Free wheeling diode $$D.... GATE EE 1994 A chopper operating at a fixed frequency is feeding an$$R$$-$$L$$load. As the duty ratio of the chopper is increased f... GATE EE 1993 ## Marks 2 More The figure shows two buck converters connected in parallel. The common input dc voltage for the converters has a value o... GATE EE 2018 A dc to dc converter shown in the figure is charging a battery bank, B2 whose voltage is constant at 150 V. B1 is anothe... GATE EE 2018 In the circuit shown all elements are ideal and the switch$$S$$is operated at$$10kHz$$and$$60$$% duty ratio. T... GATE EE 2017 Set 2 The input voltage$${V_{DC}}$$of the buck-boost converter shown below varies from$$32V$$to$$72V.$$Assume ... GATE EE 2017 Set 1 For the switching converter shown in the following figure, assume steady-state operation. Also assume that the component... GATE EE 2015 Set 2 A buck converter feeding a variable resistive load is shown in the figure. The switching frequency of the switch$$S$$i... GATE EE 2015 Set 1 The circuit shown is meant to supply a resistive load$${R_L}$$from two separate$$DC$$voltage sources. The switches ... GATE EE 2015 Set 1 A self commutating switch$$SW,$$operated at duty cycle$$\delta $$is used to control the load voltage as shown in the... GATE EE 2015 Set 1 Figure (i) shows the circuit diagram of a chopper. The switch$$S$$in the circuit in figure (i) is switched such that t... GATE EE 2014 Set 1 In the figure shown below, the chopper feeds a resistive load from a battery source.$$MOSFETQ$$is switched at$$2... GATE EE 2013 In the figure shown below, the chopper feeds a resistive load from a battery source. $$MOSFET$$ $$Q$$ is switched at $$2... GATE EE 2013 In the circuit shown, an ideal switch$$S$$is operated at$$100kHz$$with a duty ratio of$$50%$$. Given that$$\D... GATE EE 2012 A voltage commutated chopper circuit, operated at $$500Hz,$$ is shown below. If the maximum value of load current is $$1... GATE EE 2011 The L-C circuit shown in the figure has an inductance$$L=1mH$$and a capacitance$$C = 10\mu F.$$The initial current t... GATE EE 2010 The L-C circuit shown in the figure has an inductance$$L=1mH$$and a capacitance$$C = 10\mu F.$$The$$L$$-$$C$$circu... GATE EE 2010 In the chopper circuit shown, the main thyristor$$\left( {{T_M}} \right)$$is operated at a duty ratio of$$0.8$$which... GATE EE 2009 In the circuit shown in the figure, the switch is operated at a duty cycle of$$0.5.$$A large capacitor current is conn... GATE EE 2008 The circuit in the figure is current commutated$$dc-dc$$chopper where,$$T{h_M}$$is the main$$SCR$$and$$... GATE EE 2007 A voltage commutated chopper operating at $$1$$ $$kHz$$ is used to control the speed of $$dc$$ motor as shown in figure.... GATE EE 2006 A voltage commutated chopper operating at $$1$$ $$kHz$$ is used to control the speed of $$dc$$ motor as shown in figure.... GATE EE 2006 A voltage commutation circuit is shown in figure. If the turn off time of the $$SCR$$$$s$$ is $$50$$ $$\mu \sec$$ and ... GATE EE 2006 The given figure shows a step $$-$$ down chopper switched at $$1$$ $$KHz$$ with a duty ratio $$D = 0.5.$$ The peak - pea... GATE EE 2005 Figure shows a chopper operating from a $$100$$ $$V$$ $$dc$$ input. The duty ratio of the main switch $$S$$ is $$0.8.$$ ... GATE EE 2004 Figure shows a chopper. The device $${S_1}$$ is the main switching device. $${S_2}$$ is the auxiliary commutation device... GATE EE 2004 A chopper is employed to charge a battery as shown in figure. The charging current is $$5A$$. The duty ratio is $$0.2.$$... GATE EE 2003 In the chopper circuit shown in fig the input $$dc$$ voltage has a constant value $${{V_s}}$$. the output voltage $${{V_... GATE EE 2002 A step down chopper operates from a$$dc$$voltage source$${V_s}$$feeds a$$dc$$motor armature with a back$$e.m.f$$... GATE EE 2000 ## Marks 5 More In fig, the ideal switch$$S$$is switched on and off with a switching frequency$$f = 10 kHz.$$The switching time peri... GATE EE 2002 A voltage commutated thyristor chopper circuit is shown in fig. The chopper is operated at$$500Hz$$with$$50\% $$... GATE EE 2001 A$$dc$$motor with armature resistance$${R_a}$\$ is fed from a step down chopper in the continuous mode, and operates a...
GATE EE 2000

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