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DC Chopped Wave
Aug 08, 2018

A DC/DC transformation is the conversion of a variable dc voltage into a fixed DC voltage, also known as a D.C. chopper.

Chopper works in two ways, one is pulse width modulation mode TS invariant, change ton (general), and the second is frequency modulation.

(1)Buck Circuit-step-down chopper, its output average voltage U0 less than the input voltage UI, polarity is the same.

(2)Boost circuit-Step-Up chopper, its output average voltage U0 is greater than the input voltage UI, polarity is the same. 

(3)Buck-boost circuit-step-down or step-up chopper, its output average voltage U0 greater than or less than the input voltage UI, polarity opposite, inductance transmission.

(4) Cuk Circuit--buck or Step-Up chopper, its output average voltage U0 greater than or less than the input voltage UI, polarity opposite, capacitance transmission.

There are sepic, zeta circuits. The above is a non isolated DC converter circuit, isolated DC converter has a forward circuit, flyback circuit, half bridge circuit, Full-bridge Circuit, push-pull circuit.


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