Yaskawa FSP Amplifier - Manual (Page 144)

FSP Amplifier User’s Manual Chapter 5: Parameter Settings and Functions
5-77
If the previous calculation determines that the amount of regenerative
power (W
k
) that can be processed by the built-in resistor is not exceeded,
then an external regenerative resistor is not required.
If the amount of regenerative power that can be processed by the built-in
resistor is exceeded, install an external regenerative resistor for the capacity
obtained from the above calculation.
If the energy consumed by load system loss (in step 2 above) is unknown,
then perform the calculation using E
L
= 0.
When the operation period in regeneration mode is continuous, add the
following items to the calculation procedure above in order to find the
required capacity (W) for the regenerative resistor.
• Energy for continuous regeneration mode operation period: E
G
(joules)
• Energy consumed by regenerative resistor: E
K =
E
S –
(E
L
+ E
M
+ E
C
) + E
G
• Required capacity of regenerative resistor: W
K
= E
K
/ (0.2 ⋅ T)
Here, E
G
= (2
π
/60) N
MG
x τ
G
⋅ t
G
• τ
G
: Servomotor’s generated torque [oz·in (N·m)] in continuous
regeneration mode operation period.
• N
MG
: Servomotor rotation speed (rpm) for same operation period as
above.
• t
G
: Same operation period (s) as above.
Servo Amplifier’s Absorbable Energy
The following diagrams show the relationship between the servo
amplifier’s input power supply voltage and its absorbable energy.
• FSP Amplifier for 200 V motor
FSP Amplifier
FSP-
A3, A5
• FSP Amplifier for 400 V motor
FSP Amplifier
FSP-