Yaskawa i80M Connecting Manual - Manual (Page 310)

When the motor remains at standstill between cycles of acceleration and deceleration without
continuous rated speed running (Fig. A4. 4)
The timing chart of the motor armature current and speed is as shown in Fig. A4. 4 ,
The allowable frequency of operation “n” can be calculated as follows
( -
1
n=286. 5X —
NR a – a
Fig. A4. 4 Timing Chart of Motor Armature Current and Speed
. When the motor accelerates, runs at constant speed, and decelerates in a continuing cycle
without being at standstill (Fig. A4. 5)
The timing chart of the motor armature current and speed is as shown in Fig, A4. 5.
The allowable frequency of operation “n” can be calculated as follows.
n=286. 5X
‘ t - ”
Fig. A4. 5 Timing Chart of Motor Armature Current and Speed
A4. 4 SERVOMOTOR FREQUENCY
In the servo drive consisting of Servopack and servomotor, motor speed amplitude is restricted
by the maximum armature current controlled by Servopack.
The. relation between motor speed (N) and frequency (f) is shown by the formula below:
“
f
310
Fig. A4. 6 Timing Chart of Motor Armature Current and Speed