So 1st i decide to built buck-boost converter but the problem is inductor current goes so high even in low voltage (w/ input 40 Vdc inductor amp rise to 6A with no load).
but the output still smooth like pure DC signal. How can i overcome this problem? can i still use the topology with modification or is there any other suitable topologies for this spec?
Not clear what the implemented buck-boost topology is. Too high inductor current can be caused by inappropriate inductance value or wrong control scheme. Please give more information.
Not clear what the implemented buck-boost topology is. Too high inductor current can be caused by inappropriate inductance value or wrong control scheme. Please give more information.
based from my calculation (buck-boost formula on daniel w hart) Fsw=15kHZ
Fsw=15kHZ
my inductor should be above than 900uH to operate at CCM, so i think use 3mH is not problem
and capacitor with at least 1mF. For my topology is non-isolated buck-boost converter like circuit below
im very sure about my control scheme forming square wave without spike or other noises.