GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 121)

DV-300 Adjustable Speed Drives
——— CONVERTER OPERATION ———
5
45
20.00 ms/DIV 20.00 ms/DIV
20.00 ms/DIV 20.00 ms/DIV
Manual tuning of field current regulator
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ote
! In the majority of the cases the dc motors with an independent excitation operate with a
direct field (Flux reg mode = Constant current). In this case it is not necessary to optimize
the regulator of the field current and the regulator of the armature voltage.
The optimization showed below, refers to drives operating with constant power range (armature and field mixed
regulation). In these cases it is necessary to configurate the field converter for this particular use. See below.
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ote
! During the optimization of the regulator of the field current, the converter must not receive
a Start command.
- Converter disabled (no voltage on terminal 12)
- Menu LIMITS / Flux limits: Flux current max = 100% equal to the rated field current of the motor.
Flux current min = 0
- Set at 0.00 the Flux I and Flux P parameters in the REG PARAMETERS / ...menu .
- Measure the field current via an analog output. To this purpose the variable “Flux current” has to be param-
eterized on one output and the variable “Flux reference” on another (see “Input/Output programming”).
- Select the FLUX REGULATION menu.
Figure 5.3.6.1: Above: Actual spd; Below: Motor
current. Speed P too low.
Figure 5.3.6.2: Above: Actual spd; Below: Motor
current. Speed P too high.
Figure 5.3.6.3: Above: Actual spd; Below: Motor
current. Speed I too high.
Figure 5.3.6.4: Above: Actual spd; Below: Motor
current. Speed P and Speed I set correctly.