Omron R88D-1SN ECT Series User Manual

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4 Configuration and Wiring
AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User’s Manual (I586)
4-4 Regenerative Energy Absorption
4
4-4-1 Calculating the Regenerative Energy
Regenerative energy calculation for a vertical axis is explained.
• In the output torque graph, acceleration in the rising direction is shown as positive (+), and accelera-
tion in the falling direction is shown as negative (-).
• The regenerative energy values in each region can be calculated from the following equations.
Note Due to the loss from winding resistance, the actual regenerative energy will be approximately 90% of the
values calculated from these equations.
Motor operation
Motor output torque
+N1
-N2
t1 t2 t3
T
Eg1
Eg22
Upward movement
Downward movement
TD 2
TL 2
TD 1
Eg21
N
1
,
N
2
: Rotation speed at start of deceleration [r/min]
: Deceleration torque [N·m]
: Torque during downward movement [N·m]
: Deceleration time [s]
: Constant-speed driving time during downward movement [s]
T
D1
,
T
D2
t
1
,
t
3
T
L2
t
2

Omron R88D-1SN ECT Series Specifications

General

Feedback	Incremental encoder, Absolute encoder
Position Control	Yes
Speed Control	Yes
Torque Control	Yes
Communication Interface	EtherCAT
Power Supply Voltage	200 to 240 VAC
Output Power	0.1 to 1.5 kW
Input Voltage Range	170 to 264 VAC
Control Method	Sine-wave PWM control
Main Circuit Power Supply	200-240 VAC
Applicable Motor Capacity	0.1 to 1.5 kW
Protection Functions	Overcurrent, Overvoltage, Undervoltage, Overheating, Encoder Error
Ambient Operating Temperature	0 to 55°C
Vibration Resistance	4.9 m/s² (10 to 55 Hz)
Shock Resistance	98 m/s2
Weight	Varies by model