NF BP4620, Instruction Manual

Page: 73 / 214

4.4 Setting of limiters
BP4620
4-26
4.4.1 Shifting the output voltage range
The output voltage range can be shifted through the voltage limiter settings. The output voltage width
can be shifted to any position from

115 V to +115 V within the maximum output voltage range of 120
Vp-p. (However, on the negative side, it is limited to

5 V max., and on the positive side, it is limited to
+5 V max.)
+Vo -Vo
limit limit
(V) (V)
<1> +117

7
<2> +102

22
<3> +82

42
<4> +62

62
<5> +42

82
<6> +22

102
<7> +7

117
Figure 4-10. DC Output Range (When Positive/Negative Voltage Limiter Setting Difference Is
Fixed to 124 V)
As shown in Figure 4-10, the output current range changes according to the output range.
In the case of the BP4620, the DC power supply voltage of the amplifier changes according to the
voltage limiter value, to obtain an output that is as large as possible. The outputable power is maximum
when the limiter width is set to the maximum of 124 V. Note that in a case such as the one shown in
Figure 4-11, the maximum output current does not increase as much as shown in Figure 4-10 even if the
positive voltage limiter is lowered.
DC output range
When fixed to [+Vo limit] - [ - Vo limit] = 124 V
-120
-100
-80
-60
-40
-20
0
20
40
60
80
100
120
-22 -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 22
Io(A)
Vo(V)
<1>
<2>
<3>
<4>
<5>
<6>
<7>
<1>
<2>
<3>
<4>
<5>
<6>
<7>