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How can one calculate the efficiency of a Single phase inverter?

I am working on a 50 Hz, 230V (RMS) single phase inverter, the inpt sor!e !rrent !ontains "# !rrent,

swit!hing $re%en!& ripple an' 00 Hz ripple *hen how !an i !al!late the e$$i!ien!& o$ the inverter+

Sujit K. Biswas -a'avpr .niversit&

In the presen!e o$ harmoni!s, the !orre!t wa& to measre power is to take the time average o$ the

instantaneos pro'!t o$ voltage an' !rrent It is the same as the average o$ instantaneos power

Measring p$ n'er 'istortion !an /e %ite tri!k& sin!e !rrent harmoni!s 'o not !ontri/te to average

power i$ voltage is sinsoi'al Hen!e Irms ma& not /e o$ se either

However, on "# si'e, i$ the voltage is per$e!tl& !onstant (withot ripple), then V'!Iav will give the

tre power 1therwise the a/ove pro!ess is nee'e'

ov 3, 20

Salah Eldeen Gasim S'an .niversit& o$ S!ien!e an' *e!hnolog&

4hether &o are 'oing &or eperiment pra!ti!all& at a la/ or virtall& sing a simlator, &o nee' to

measre /oth inpt an' otpt powers o$ the inverter to !al!late the e$$i!ien!& Regar'ing the

harmoni!s !ontents an' !al!lation o$ the %alit& o$ the 6# &o o/taine' &o nee' to se a power

anal&zer to rea' harmoni!s amplit'es, or i$ &o are sing sa& Simpowersystems o$

M6*7689SIM.7I:, &o nee' to se its ;;* anal&sis

Hope this helps

ov 3, 20

Sreekanth tg In'ian Institte o$ *e!hnolog& Ma'ras

*hanks Salah

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sir,

#rrentl& i am 'oing simlation sing simpowers&stems I 'i' ;;* anal&sis an' $on' harmoni!

!ontents

&o mean to sa&, e$$i!ien!& > ?vo(rms) io(rms)p$)9(V'! i'!)@

where i'! is the '! !omponent o/taine' when 'o ;;* o$ the inpt !rrent

ov 3, 20

Salah Eldeen Gasim S'an .niversit& o$ S!ien!e an' *e!hnolog&

4el!ome Mr Sreekanth,

Aes ea!tl&, &o !an measre the "# voltage an' !rrent as well at the inverter inpt si'e

ov 3, 20

Sujit K. Biswas -a'avpr .niversit&

In the presen!e o$ harmoni!s, the !orre!t wa& to measre power is to take the time average o$ the

instantaneos pro'!t o$ voltage an' !rrent It is the same as the average o$ instantaneos power

Measring p$ n'er 'istortion !an /e %ite tri!k& sin!e !rrent harmoni!s 'o not !ontri/te to average

power i$ voltage is sinsoi'al Hen!e Irms ma& not /e o$ se either

However, on "# si'e, i$ the voltage is per$e!tl& !onstant (withot ripple), then V'!Iav will give the

tre power 1therwise the a/ove pro!ess is nee'e'

ov 3, 20

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Sreekanth tg In'ian Institte o$ *e!hnolog& Ma'ras

*hank &o sBit : 8iswas sir,

as &o sai' we have to !onsi'er onl& "# !omponent o$ inpt !rrent while !al!lating inpt power

M& %estion is what a/ot other !omponents like 00Hz ripple an' swit!hing ripple what is the

importan!e or 'raw/a!ks o$ these !omponents I$ loa' is at .C; , there is no rea!tive power, then

what is the se o$ this !omponents+ an' where this !omponents go $rom inpt si'e

ov , 20

Sujit K. Biswas -a'avpr .niversit&

I$ &o are talking o$ harmoni!s on "# si'e, then the& are /asi!all& 6# !omponents with zero average

vale Hen!e, mltipl&ing them /& a stea'& "# means average vale is still zero D Hen!e the& !annot

!ontri/te to average power trans$er

*he 00Hz ripple is !reate' /& the re$le!tion o$ power $low at 6# si'e to the "# si'e, 6t nit& p$,

when the !rrent starts $rom zero, the power also starts $rom zero 4hen the !rrent rea!hes its peak

(at same time as voltage peak), the power 'rawn rea!hes peak So on an' so $orth *hs the power

'rawn is not stea'& /t a 'o/le $re%en!& !omponent with an average vale *his !reates the 00Hz

ripple !rrent on "# si'e Similar $or swit!hing ripples

It is interesting to note that s!h mltiple o$ power $re%en!& ripple will not /e i'eall& present at the

"# si'e o$ a 3Ephase inverter sin!e the power $low !an /e shown to /e stea'& in 3Ephase s&stems,

nlike the plsating $orm in Ephase s&stems D Swit!hing $re%en!& !omponents however will still /e

present

ov , 20

Sreekanth tg In'ian Institte o$ *e!hnolog& Ma'ras

*hank &o sBit : 8iswas sir, &or eplanation is ver& goo'

ow m& 'o/t is !lari$ie'

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ov , 20