All,
Attached are measurements made on a single cap switching scheme, (also attached).
The Watts display is 20W per division. Ignore the units displayed in the Math function as AxB function takes its units from channel A or B, so to get the measurement table to display Watts I hade to change the Amps units on Channel 1 to Watts. This is a bug in the DS1104Z Rigol scope.
I increased the switch open times so you can see the zero line in the Watts display. I then included another shot with this line marked in red.
Source V & I phase is close to 0 deg.
If you look at the max and min in the Math measurement table it shows about 30W forward and 30W in reverse, with an average close to zero.
Load measurement in the Math measurement table is showing a 16W avergage.
Load V & I is in phase.
Barry
Attached are measurements made on a single cap switching scheme, (also attached).
The Watts display is 20W per division. Ignore the units displayed in the Math function as AxB function takes its units from channel A or B, so to get the measurement table to display Watts I hade to change the Amps units on Channel 1 to Watts. This is a bug in the DS1104Z Rigol scope.
I increased the switch open times so you can see the zero line in the Watts display. I then included another shot with this line marked in red.
Source V & I phase is close to 0 deg.
If you look at the max and min in the Math measurement table it shows about 30W forward and 30W in reverse, with an average close to zero.
Load measurement in the Math measurement table is showing a 16W avergage.
Load V & I is in phase.
Barry
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