MICROSPEED
30
REV 04/05
Armature feedback mode may be used as speed
feedback when a tachogenerator is not fitted to the
motor.
Speed control is then less precise(the regulation range
is 1/20, and below this value the torque is reduced).
This funciton will be enabled by solder bridge (closed)
JP7 and mounting in the socket RA and RCA resistors.
RA resistor It will be mounted on the socket pin 2-
23 to adapt the system to the voltage motor costant.
To calculate it use this equation:
RA
(kohm)
= 166
x
10
= 36 Kohm
60 - 1,4 x10
E
=
3000 x 20
=
60
1000
WHERE:
E
=
n x Ke
1000
Ke= Servomotor BEMF at 1000 rpm
Vref= Max voltage reference.
n= max speed express in rpm.
Use the nearest commercial value, 33 Kohm.
Example:Servomotor with Ke=20 n=3000 RPM
Vref=10 For MCS60.
RA
(k ohm)
= 166
*
Vref
E - 1,4 * Vref
MCS60
RA
(k ohm)
= 159
*
Vref
E - 3 * Vref
MCS110
6.6 Armature feedback adjustment
To Next Page
Loading...
