Electrical Simplified_ Cuk Converter.pdf
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Saurabh Singh
Cuk Converter
The Cuk converter is a step-down/step-up converter based on a switching boost-buck topology. Essentially, the converter is composed of two sections, an input stage and an output stage. The input voltage vg is fed into the circuit via inductor L1. When transistor Q1 is on, current i1 builds the magnetic field of the inductor in the input stage. The diode CR1 is reverse biased, and energy dissipates from the storage elements in the output stage. When Q1 turns off, inductor L1 tries to maintain the current flowing through it by reversing polarity and sourcing current as its magnetic field collapses. It thus provides energy to the output stage of the circuit via capacitor C1. R1 and R2 are parasitic or stray resistances of inductor.
Contents ► 2011 (38) ▼ 2012 (17) ► January 2012 (3) ► February 2012 (1) ► March 2012 (5) ▼ April 2012 (3) Cuk Converter
The inductor currents are the input and output currents, therefore, if the principle of conservation of energy is applied:
Flyback Transformers Dielectric Heating ► November 2012 (1) ► December 2012 (4) ► 2013 (12) ► 2014 (4) ► 2015 (8) ► 2016 (9)
where Ds is the duty cycle of the switch :
► 2017 (3)
Popular Posts The voltage ratio of a Cuk converter is the same as that of a buck-boost converter, but its main advantage over other converters is that the input and output inductors result in a filtered current on both sides of the converter, while buck, boost, and buck-boost converters have a pulsating current that occurs on at least one side of the circuit i.e either on input side or output side. This pulsation will increase the ripple in the circuit and due to this ripple , the efficiency of battery gets lowered. To ensure good efficiency ripple should be reduced. By controlling the duty cycle of the switch , the output voltage vo can be controlled and can be higher or lower than the input voltage vg. By using a controller to vary the duty cycle during operation, the circuit can also be made to reject disturbances ,as second part of circuit consists of parallel resonance circuit and it work as a tank circuit for specific frequency (resonant frequency) , and during resonance current will not be allowed to enter in the circuit.
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Cuk Converter The Cuk converter is a step-down/step-up converter based on a switching boost-buck topology. Essentially, the converter is composed... Speed Regulator (TRIAC) TRIAC Basics The TRIAC is a component that is effectively based on the thyristor. It provides AC switching for electrical systems... Power Swing Power Swing which is basically caused by the large disturbances in the power system which if not blocked could cause wrong operation o... Induction Disk Relay In order to operate, the induction disk relay torque is produced that acts on a metal disc to make contact, according to the fol... Negative-sequence current In a perfectly balanced system, no negative phase sequence currents would exist. However, it is virtually impossible to acheive this perfe... Dielectric Heating A dielectric is an electrical insulator that can be polarized by an applied electric field. When a dielectric is placed... Q Factor The Q, quality factor , of a resonant circuit is a measure of the goodness or quality of a resonant circuit. A higher value for thi... Basics Of Motor And Generator DC MOTORS A simple DC motor has a coil of wire that can rotate in a magnetic field. The current in the coil is supplied via two brushes t... Marx impulse generator
The Marx impulse generator can simulate a lightning strike. As most...
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Electrical Simplified CLICK HERE to view Blog--->Did You KNOW!!!
Saurabh Singh
Cuk Converter
The Cuk converter is a step-down/step-up converter based on a switching boost-buck topology. Essentially, the converter is composed of two sections, an input stage and an output stage. The input voltage vg is fed into the circuit via inductor L1. When transistor Q1 is on, current i1 builds the magnetic field of the inductor in the input stage. The diode CR1 is reverse biased, and energy dissipates from the storage elements in the output stage. When Q1 turns off, inductor L1 tries to maintain the current flowing through it by reversing polarity and sourcing current as its magnetic field collapses. It thus provides energy to the output stage of the circuit via capacitor C1. R1 and R2 are parasitic or stray resistances of inductor.
Contents ► 2011 (38) ▼ 2012 (17) ► January 2012 (3) ► February 2012 (1) ► March 2012 (5) ▼ April 2012 (3) Cuk Converter
The inductor currents are the input and output currents, therefore, if the principle of conservation of energy is applied:
Flyback Transformers Dielectric Heating ► November 2012 (1) ► December 2012 (4) ► 2013 (12) ► 2014 (4) ► 2015 (8) ► 2016 (9)
where Ds is the duty cycle of the switch :
► 2017 (3)
Popular Posts The voltage ratio of a Cuk converter is the same as that of a buck-boost converter, but its main advantage over other converters is that the input and output inductors result in a filtered current on both sides of the converter, while buck, boost, and buck-boost converters have a pulsating current that occurs on at least one side of the circuit i.e either on input side or output side. This pulsation will increase the ripple in the circuit and due to this ripple , the efficiency of battery gets lowered. To ensure good efficiency ripple should be reduced. By controlling the duty cycle of the switch , the output voltage vo can be controlled and can be higher or lower than the input voltage vg. By using a controller to vary the duty cycle during operation, the circuit can also be made to reject disturbances ,as second part of circuit consists of parallel resonance circuit and it work as a tank circuit for specific frequency (resonant frequency) , and during resonance current will not be allowed to enter in the circuit.
Newer Post
Home
Older Post
Cuk Converter The Cuk converter is a step-down/step-up converter based on a switching boost-buck topology. Essentially, the converter is composed... Speed Regulator (TRIAC) TRIAC Basics The TRIAC is a component that is effectively based on the thyristor. It provides AC switching for electrical systems... Power Swing Power Swing which is basically caused by the large disturbances in the power system which if not blocked could cause wrong operation o... Induction Disk Relay In order to operate, the induction disk relay torque is produced that acts on a metal disc to make contact, according to the fol... Negative-sequence current In a perfectly balanced system, no negative phase sequence currents would exist. However, it is virtually impossible to acheive this perfe... Dielectric Heating A dielectric is an electrical insulator that can be polarized by an applied electric field. When a dielectric is placed... Q Factor The Q, quality factor , of a resonant circuit is a measure of the goodness or quality of a resonant circuit. A higher value for thi... Basics Of Motor And Generator DC MOTORS A simple DC motor has a coil of wire that can rotate in a magnetic field. The current in the coil is supplied via two brushes t... Marx impulse generator
The Marx impulse generator can simulate a lightning strike. As most...
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