Wayne Kerr AP10030, Руководство пользователя и обслуживания

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28 Wayne Kerr AP 1kW Power Supplies • Issue 2
a) Limitations
The maximum voltage allowed between the output and earth is 200V d.c. This limits the
number of units that can be connected in series. For the AP6050, up to 3 units can be
operated over their full range, uni-polar with respect to ground, and 6 units for centre-
tapped bipolar operation. For operation at a higher current with limited output voltage,
more units can be connected together. However, care must be taken to limit the
maximum voltage above ground to 200V d.c.
b) Connections For Master-Slave Operation
1
1
1
2
2
2
3
3
3
4
4
4
5
5
5
6
6
6
7
7
7
8
8
8
9
9
9
10
10
10
11
11
11
12
12
12
13
13
13
-
-
-
+
+
+
Master
Load
-S
-S
-S
-S
-S
-S
+S
+S
+S
Slave1
Slave 2
+
+
+
-
-
-
+
-
y x
y
x
Fig. 6.9 Connections for master slave series operation
c) Calculation Of Resistor Divider Values For Series Master-Slave Operation
If the slaves are to deliver the same output voltage as the master then (where n = 6 for 30-
80, 12 for 60-50 & 20 for 100-30)
R
X
= (2n-1) R
Y
for each pair of X and Y. If the slaves are to give a different output voltage than that of
the master where r = ratio of voltages V MASTER/V SLAVE. Then:
R
X
= n(1+r)R
Y
- R
Y
.
Choosing standard resistor values may necessitate having some difference in output
voltages. In this case, the load voltage is the sum of the reading of each power supply’s
voltmeter. Alternatively a separate voltmeter can be connected across the load.