Interleaved Buck Converter Case Study

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Chapter 3
Interleaved Buck Converter System
3.1 INTRODUCTION Interleaved Buck Converter has lots of concentration due to its simple and low control complexity in application. where no isolation and high output current with low ripple. An No isolation DC/DC converter Fig.1.1 shows the step-down DC/DC converter. When switch M is on for the duration of dTs, power is transferred from source to load and filter inductor L is charged. When switch M is off for a duration (1-d)Ts, the diode D becomes forward-biased and forms a conduction path for the filter inductor current. The voltage across the filter inductor is the reverse of the output voltage. By using filter inductor volt-second balance rule,
(VDC-Vo)dTs = Vo(1-d)Ts (1.1)
Vo = dVDC (1.2)
As observed from equation (1.2), the regulated output voltage (Vo) is lower than the input voltage(VDC). Interleaved Buck Converter has lots of attention due to its simple and low control complexity in application where no

isolation , step-down conversion ratio, and high output current with low ripple are required [1]-[5]. Fig.1.1.Step-down (Buck) converter
In the conventional IBC all active
…show more content…
In the conventional IBC, the active switches are connected in parallel but in this converter two active switches are connected in series and a coupling capacitor is employed in the power path. The two active switches are driven with phase shift angle of 180° and the output voltage is regulated by adjusting the duty cycle at a fixed switching frequency. The proposed IBC operates at CCM, the current stress is low. The voltage stress across all active switches before turn-on or after turn-off, during the steady state is half of the input

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