Power-supply efficiency. A certain power supply operates from an AC line and delivers 48 VDC (essentially constant) at a current ranging up to 25 A. As the 48-VDC load current increased from 0 to 25 A, data was taken on the power factor and current drawn from the constant-voltage 120 VAC (rms) source. This data is presented in Table 10.1. For each line of the table, calculate Adoing aan
Power-supply efficiency. A certain power supply operates from an AC line and delivers 48 VDC (essentially constant) at a current ranging up to 25 A. As the 48-VDC load current increased from 0 to 25 A, data was taken on the power factor and current drawn from the constant-voltage 120 VAC (rms) source. This data is presented in Table 10.1. For each line of the table, calculate Adoing aan
Introductory Circuit Analysis (13th Edition)
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Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Question
![10.1. Power-supply efficiency. A certain power supply operates from an AC line
and delivers 48 VDC (essentially constant) at a current ranging up to 25 A.
As the 48-VDC load current increased from 0 to 25 A, data was taken on the
power factor and current drawn from the constant-voltage 120 VAC (rms)
source. This data is presented in Table 10.1. For each line of the table,
calculate
(a) net PIN = V₁N(rms)(rms) (power factor),
(b) POUT = VOUT OUT de
(c) percent efficiency n = (PouT/PIN) x 100%, and
X
OUT
(d) power dissipated in the supply PDISS = PIN-POUT For what value of out-
put current is the efficiency highest? For what value of output current
is the dissipated power highest?
TABLE 10.1 Power-supply Efficiency Test Results
AC current (rms) Power factor (%)
0.1
75
0.5
80
5
85
90
90
10
13.9
Load current (A)
0
0.6
8.5
19.1
25](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4bf62d6d-db44-481f-809c-2b5fe2fdf00c%2Fdf5abc17-4d2b-4f2d-9075-f6a692edfee6%2Fi63imdg_processed.png&w=3840&q=75)
Transcribed Image Text:10.1. Power-supply efficiency. A certain power supply operates from an AC line
and delivers 48 VDC (essentially constant) at a current ranging up to 25 A.
As the 48-VDC load current increased from 0 to 25 A, data was taken on the
power factor and current drawn from the constant-voltage 120 VAC (rms)
source. This data is presented in Table 10.1. For each line of the table,
calculate
(a) net PIN = V₁N(rms)(rms) (power factor),
(b) POUT = VOUT OUT de
(c) percent efficiency n = (PouT/PIN) x 100%, and
X
OUT
(d) power dissipated in the supply PDISS = PIN-POUT For what value of out-
put current is the efficiency highest? For what value of output current
is the dissipated power highest?
TABLE 10.1 Power-supply Efficiency Test Results
AC current (rms) Power factor (%)
0.1
75
0.5
80
5
85
90
90
10
13.9
Load current (A)
0
0.6
8.5
19.1
25
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