27
Service Manual
www.microphase.eu
Dc
Setting for Brush motor with armature
RA resistor calculations
Vdc = Vrms * 1,41
EXAMPLE:
Brush DC motor with Ke= 26V/Krpm (Vdc)
Drive model 145
Nominal speed N° =3000rpm
Risult: Vdc= 26*3000/1000= 78V
Insert on base "RA" to adapt the system to use the motor voltage.
Where:
For the Example, risult Vdc=81V. The table shows a resistor with a value of 33Kohm.
Once the resistor RA is inserted, proceed with final speed adjustment.
Operate using trimmer SPEED on the front of the drive. With Clockwise Rotation the speed increases.
With Counter Clockwise Rotation the speed decreases. The Range of regulation is about +/- 25%.
Table Vdc voltage
Value of RA in Kohm
In this configuration, the drive must set with the following Dip Switch and below internal setting:
Dip Switch set for:
- Armature feedback
- Ramp time disabled
- Standard Dynamic constant
Note: On the adjustement zone are not considered
here the other components used to determine other
calibrations "for example. Calibration current rating
etc.".
DIP SWITCH
ADJUSTEMENT
Model
Voltage output Vdc
RA
82 68
56
47
39
33
27
20
15
12
8,2
5,6 3,9
1
65
57 53
49
45
42
38
34
28,5 23
20,5 16
12
10
5
145
121 113 105 97
88
81
72
60
50
43
33
26
20
10
205
206 193 178 165
151 138
123
103
86
74
57
44
35
18
305
206 193 178 165
151 138
123
103
86
74
57
44
35
18
