Simple Calculation Method - Delta ASD-B2-0121-B User Manual

Simple Calculation Method

The users can select the adequate regenerative resistors according to the allowable frequency
required by actual operation and the allowable frequency when the servo motor runs without
load. The allowable frequency when the servo motor run without load is the maximum
frequency that can be operated during continuous operation when servo motor accelerate
from 0r/min to rated speed and decelerate from rated speed down to 0r/min. The allowable
frequencies when the servo motor run without load are summarized in the following table.
Allowable Frequencies for Servo Motor Running Without Load (times/min)
Motor Capacity
ECMA Series
ECMA□□C
ECMA□□E
ECMA□□G
( ) : motor frame size, unit is in millimeters.
When the servo motor runs with load, the allowable frequency will change according to
the changes of the load inertia and rotation speed. Use the following equation to calculate
the allowable frequency.
Allowable fr equency =
m = load/motor inertia ratio
Revision June 2010
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
Chapter 2 Installation and Storage
1.0kW 1.5kW
10 15
- 137 -
- 42 32
- -
2.0kW 2.0kW 3.0kW
20 20 30
83
(F100)
24 10
11
(F130) (F180)
- -
2
Rated s peed
x
Operating speed
-
-
times
mi n.
2-13