YOKOGAWA DLM3024 User Manual

17-4
IM DLM3054-01EN
• Loss calculation period: The period from the point where the voltage waveform goes below the U Level
immediately after the waveform goes below the mesial level to the point where the waveform goes above the
U Level immediately before the waveform goes above the mesial level.
Loss in the loss calculation period
When the type of loss is RDS(on) x I2,
i(t)
2
dt + i(t)
2
dt
…
+ i(t)
2
dt
{
{
T
L11
T
L12
T
L21
T
L22
T
Ln1
T
Ln2
If there are n voltage waveform cycles between the T Range1 and T Range2 cursors
= RDS(on)
RDS(on): On-resistance
Vce(SAT): Collector-emitter saturation voltage
i(t): Sampled current data
T
L11
, T
L12
, T
L21
, T
L22
…
T
Ln1
, T
Ln2
: Time values in the loss calculation period
Loss in the loss calculation period
When the type of loss is VCE(sat) x I,
i(t)
dt + i(t) dt
…
+ i(t) dt
{
{
T
L11
T
L12
T
L21
T
L22
T
Ln1
T
Ln2
= Vce(SAT)
• Zero loss period: The period from the point where the current waveform first goes below the I Level after the
waveform passes the middle point of the loss calculation period to the point where the waveform first goes
above the I Level after the waveform passes the middle point between the relevant loss calculation period and
the next loss calculation period. The instrument assumes that the current and loss are zero.
• Switching period: The period other than the loss calculation period or zero loss period described above.
Positive switching period is the period in which the current waveform is rising; negative switching period is
that in which the current waveform is falling.
u(t): Sampled voltage data
i(t): Sampled current data
T
s11, Ts12, Ts13, Ts14, Ts21, Ts22, Ts23, Ts24
…
T
sn1, Tsn2, Tsn3, Tsn4:
Time values in the switching period
Loss in the switching period
=
u(t)
•
i(t) dt + u(t)
•
i(t) dt + u(t)
•
i(t) dt + u(t)
•
i(t) dt
…
+ u(t)
•
i(t) dt + u(t)
•
i(t) dt
T
s11
T
s12
T
s13
T
s14
T
s21
T
s22
T
s23
T
s24
T
sn3
T
sn4
T
sn1
T
sn2
If there are n voltage waveform cycles between the T Range1 and T Range2 cursors,
there are 2n switching periods.
17 Power Supply Analysis Feature (Power Analysis and Power Measurement, Option)

YOKOGAWA DLM3024 Specifications

General

Brand	YOKOGAWA
Model	DLM3024
Category	Test Equipment
Language	English