Chapter 2 InstallationASDA-A2R Series
Revision December, 2014
2-13
Linear Motor:
Regenerative Power Selection
(a) When the external load on torque does not exist
If the motor operates back and forth, the energy generated by the brake will go into
the capacitance of DC bus. When the voltage of the capacitance exceeds a specific
value, the redundant energy will be consumed by regenerative resistor. Two ways of
selecting regenerative resistor are provided here. The table below provides the
energy calculation method. Users can refer to it and calculate the selected
regenerative resistor.
Servo Drive
(kW)
Motor
Three times of
coil weight
(coil assembly)
m (kg)
Regenerative
power from
empty load
5m/s to stop
Eo (joule)
The maximum
regenerative
power of
capacitance
Ec (joule)
0.1
ECML-S1606A2DNS 1.05 13.125 4.21
ECML-S1608A2DNS 1.35 16.875 4.21
0.2
ECML-S2003A2DNS 1.95 24.375 5.62
ECML-S2004A2DNS 2.49 31.125 5.62
ECML-S2005A2DNS 3 37.5 5.62
0.4
ECML-S2504A2DNS 3.3 41.25 8.42
ECML-S2506A2DNS 4.8 60 8.42
ECML-S3204A2DNS 6.3 78.75 8.42
0.75
ECML-S2508A2DNS 4.5 56.25 17.47
ECML-S3206A2DNS 6.6 82.5 17.47
ECML-S3208A2DNS 8.4 105 17.47
Assume the total weight of movable section and load is m kg, when v m/s decelerates
to 0, its regenerative energy is E = 0.5 mv
2
(joule) and the consumed regenerative
resistor is E – Ec joule. If the cycle of back and forth operation is T sec, then the
power of regenerative resistor it needs is 2 × (E – Ec) / T. Followings are the
calculation procedure:
Steps Item Calculation and Setting Method
1
Set the capacity of regenerative
resistor to the maximum
Set P1-53 to the maximum value
2
Set T cycle of back and forth
operation
Enter by the user
3 Set up the speed v Enter by the user or read via P0-02
4
Set up the total weight of movable
section and load, N
Enter by the user or read via P0-02
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