Delta ASDA-B2 Series User Manual page 37

Chapter 2 Installation
(2) Simple Selection
Choose the appropriate regenerative resistor according to the allowable frequency and
empty load frequency in actual operation. The so-called empty allowable frequency is the
frequency of continuous operation when the servo motor runs from 0 r/min to the rated
speed and then decelerates from the rated speed to 0 r/min within the shortest time. The
following table lists the allowable frequency when the servo drive runs without load
(times/min).
Allowable Frequencies for Servo Motor Running Without Load (times/min)
Motor Capacity
ECMA Series
ECMA  C
ECMA  E
ECMA  G
When the servo motor runs with load, the allowable frequency will be different
according to different load inertia or speed. The following is the calculation method.
m represents load / motor inertia ratio.
Allowable fr equency =
The comparison table of external regenerative resistor is provided below. Please
choose the appropriate regenerative resistor according to the allowable frequency.
The table below describes the suggested allowable frequency (times/min) of
regenerative resistor when the servo drive runs without load.
Allowable Frequencies for Servo Motor Running Without Load (times/min)
Motor Capacity
Regenerative Resistor
200W 80Ω
400W 40Ω
1kW 30Ω
2-16
When Using Built-in Regenerative Resistor
600W 750W 900W
06 07 09
- 312
- -
42 - 31
Allowable frequency when serv o motor run without load
m + 1
When Using External Regenerative Resistor
100W 200W
01 02
32793 6855
- -
- -
1.0kW 1.5kW
10 15
- 137 -
- 42 32
- -
ECMA  C
400W 400W
(F60) (F80)
04 04
4380 1784
- -
- -
ASDA-B2
2.0kW 2.0kW 3.0kW
20 20 30
83
(F100)
24 10
11
(F130) (F180)
- -
2
Rated s peed
x
Operating speed
750W 1.0kW 2.0kW
07 10
1074 458
- 916
- -
Revision May, 2018
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