Eng: What happens if the duty cycle of a dc-dc converter will be changed?Est: Mis juhtub kui muuta alalsipingemunduri täitetegurit (duty cycle)?Question 4Answera.Input current changes / Muutub sisendvoolb.Switching frequency changes / Muutub muunduri töösagedusc.Input voltage changes / Muutub sisendpinged.Output voltage changes / Muutub väljundpingee.Output current changes / Muutub väljundvool

Eng: Dc-dc converters do not need feedback since their output only depends on the duty cycle.Est: Alalispingemuundurid ei vaja tagasisidet kuna nende väljund sõltub ainult täitetegurist. Question 5Select one:TrueFalse

Which of the following does NOT happen when duty cycle increases?Question 2Select one:a.Output voltage increases (in CCM)b.Current ripple increasesc.Output voltage decreases (in DCM)d.Movement from DCM (Discontinuous Conduction Mode) to CCM (Continuous Conduction Mode)

Describe how the dc voltage at the buck chopper output varies when the duty cycle of the switching controlsignal is increased

In closed loop, which of the following are directly (ie user) controlled?Question 3Select one:a.Duty cycleb.Output voltagec.Output currentd.Inductor voltage

Assume a Flyback converter that is operating in the DCM. Which of the following can change the operation to the CCM?Question 8Select one:a.Increasing the transformer turn ratiob.decreasing the magnetising inductance c.decreasing the switching frequency d.decreasing the output resistance