9
Select R13 resistance adapted to the specific application also taking the motor
characteristics into consideration.
Specifications subject to change without notice
Start-up procedure
n
max
[rpm]
– max. controllable speed (indicatives values)
Gain [rpm/V]
– gain factor of Servo Amplifier (tolerance
±
15%);
it corresponds to ratio between motor speed
and analog speed command voltage.
7.7
Speed range selection with Hall sensor feedback
n
max
[rpm]
R13 [k
Ω
]
Gain [rpm/V]
R13 resistance mounted originally: 20 k
Ω
/ 0,6W /
±
1%
C7 capacitor mounted originaly: 10 nF / 100V /
±
10%
Application example:
Brushless DC Servomotor type 2444 S 024 B; max. speed of motor requested in this
application n
max
= 12 000 rpm.
1.
Selection of R13 resistance:
R13 = 36 k
Ω
; resulting in a max. controllable speed of approx. 15 000 rpm,
slightly higher than 12 000 rpm, which allows a wide speed range operation
of the motor.
Note: A resistance value selected between 36 k
Ω
(15 000 rpm) and 56 k
Ω
(10 000 rpm) would better define the speed range.
2.
The gain value allows to calculate the analog input command for a given speed
(speed command = speed / gain).
Example: For 6 000 rpm the speed command is approx 2 V
(speed command = 6 000 / 2 970).
60 000
9,1
12 270
50 000
10
10 250
40 000
14
7 720
30 000
16
6 400
26 500
20
5 300
20 000
27
4 100
15 000
36
2 970
10 000
56
1 970
