Installation manual
Beta series EtherCAT Servo Drives | Ref.2107 BCSD EtherCAT - 15|52
1.3. Regenerative Energy Calculation Method
The procedure for calculating the regenerative resistor capacity when acceleration and
deceleration operation is shown in the following diagram.
Calculation procedure
The procedure for calculating the capacity is as follows:
STEP PROCEDURE UNITS EQUATION
1
Find the rotational energy
of the servo system
Es
Es
in J
Jl
and
Jm
in kg·m²
Nm
in rev/min
Es = (Jl+Jm)xNm² /182
Nm
: motor speed
Jl
: load inertia
Jm
: motor inertia
2
Find the energy
consumed by the load
system loss
El
during the
deceleration period
l
in N·m
El
in J
Nm
in rev/min
td
in s
El =
x
(Nm
x
l
x
td) / 60
l
: motor torque.
= Un003 x 0.01 x rated
torque
3
Calculate the energy lost
from servomotor winding
resistance
Em
in J
I
in A
and
R
in
td
in s.
deceleration stopping time
Em =
√3
x
I
x
R
x
td
R
: resistance among motor
windings.
I
: servomotor current.
= Un003 x 0.01 x rated
current
4
Calculate the servo
amplifier energy
Ec
that
can be absorbed
Ec
in J
C
in F
U1, U2
in V
Ec =
0.5
x
C (U1² - U2²)
C
: servo amplifier
capacitor capacity
U1
: regenerative voltage
capacitor capacity
- for 200 Vac U1: 380 V
- for 400 Vac U1: 780 V
U2
: DC BUS voltage
WLPH
1
PPRWRUURWDWLRQVSHHG
URWDWLRQVSHHG
WG
WLPH
PRWRUWRUTXH
UHJHQHUDWLYH
WRUTXH
WOORDGWRUTXH
7
To Next Page
Loading...