Help me solve this problem please..!!!
Help me solve this problem please..!!!
(OP)
Design a single-phase bipolar PWM inverter which will produce a 75V rms 50Hz from a 150V dc source. The load is a series combination of R=12 Ohms and L=60mH. Select a switching frequency such that the current THD is less than 10%. State assumptions used in the design.





RE: Help me solve this problem please..!!!
Calc. desired peak current -- from this max. duty cycle.
From time constant, calc. current waveform (exp. up/down)
as function of PWM frequency and its Fourier series.
THD as function of Fr --- solve it for <<10%
You may sum the infinite series or estimate the # of harmonics you have to use.
I suggest you to write a computer simulation for reality check -- it shoud'n take more than a few hours.
<nbucska@pcperipherals.com>
RE: Help me solve this problem please..!!!
http://www.e-insite.net/ednmag/index.asp?layout=searchAllEDN&text=%22PWM%22
http://www.teamapex.com/design/index.html
http://www.teamapex.com/pdf/app_notes/apnote30.pdf
etc. for more info