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3. 6
TYPICAL CURRENT AND VOLTAGE (WAVE FORMS AT MOTOR)
3.6.1. CURRENT PHASE C
200 V
CSW1
V = -8.0 V
3.6.2. VOLTAGE LINE A-C
200 V
DSW1
200 V
CSW1
V = -8.0 V
The EB-206-C is illustrated at 1500 rpm, 4.4 lb-ft.
3. 7
INTERMITTENT DUTY OPERATION
If a motor operates intermittently, it is not necessary that the peak load torques fall within the
motor's continuous torque capabilities. However, it is important that the RMS (root mean square)
load torque be inside the continuous duty zone. The key here is that a sufficient OFF time follows
each ON time of the motor.
(EQ1) gives the RMS torque:
EB-20X Installation & Service Manual | Motor Data Package
5 ms VZR -0.16
T = 19.65 ms
5 ms
TPOS-7
5 ms VZR -0.16
T = 19.65 ms
(EQ-1)
T
t
+ T
2
2
1
1
2
T
=
RMS
t
+ t
1
T
= Torque at Time i
i
t
= Duration of time i
i
Kollmorgen | kdn.kollmorgen.com | September 2020
t
+ . . . T
t
2
2
i
i
+ . . . t
2
i
35
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