OE Max Controls CSDP Plus, User Manual

Page: 108 / 254

110
The revolving energy of the servo motor E
M
can be calculated by the
following formula.
N
M
= Set Speed
J
M
= Motor Inertia
n = Inertia Ratio
The energy consumed by the load in the deceleration section E
L
can be
calculated by the following formula.
T
L
= Motor Torque
T
D
= Deceleration Time
If the energy consumed by the load is unknown, then calculate with
E
L
=0.
The heat loss energy consumed by the coil resistance of the motor E
R
can be calculated as shown in the formula below.
R
a
= Phase Resistance
K
T
= Torque Parameter
The units used in the aforementioned formula are as follows.
The regenerative energy produced when continuous regeneration
sections occurred under the vertical load condition are called
E
G
and
the selection standard of the regenerative resistor can be calculated as
shown below.
ATTENTION
Please make sure the rated power of the regenerative resistor
is calculated accurately. If the calculated rated power of the
regenerative resistor is bigger than the rated power of the
internal regenerative resistor, please remove the existing
resistor and set up an external regenerative resistor.
Units used in the formula for the regenerative resistor
Item Unit
Energy E = Joules = kgm
2
/s
2
Torque
τ
= Nm
Inertia J = kgm
2
Time T = s = 1/60 Min
Speed N = RPM = 60/2
π
rad/s
Torque Constant K
T
= Nm/A
( )
182
1
2
M M
M
N n J
E
× + ×
=
( )
D L M L
T N E
× × =
τ
π
60
D
T
L
ˆ
R
T
K
R E
× × × =
2
2
3
Ɏ
O P