Selection criteria
5.
Ref.1912
· 223 ·
DDS
HARDWARE
5.5 Ballast resistor selection guide
Calculate the value of:
Based on the following formulae:
where:
Wm
Energy generated by the braking of each system motor.
Pe
Rms power generated by all braking of all the motors
throughout a complete duty cycle.
Jt
Total inertia of the
P
ower
D
rive
S
ystem (motor+mechanics) in
kg.m².
n
Turning speed of the motor when the braking starts in rpm.
Wmi
Energy of each braking during a cycle of time T in Ws.
Wp
Potential energy lost by the machine mass while braking (only on
non-compensated axes) in Ws.
ti
Braking time (in seconds) when the Wmi energy is generated.
T
Time (in seconds) in a full cycle.
Dh
Height (in m) lost while braking.
Wmx
Maximum energy among all the Wm.
Pmx
Maximum power generated by all the braking, given by the maxi-
mum value among all the (Wmi / ti) quotients of each braking in kW.
Wm
Wp
1
2
---
+
Jt
2
n
60
--------------
2
Ws
=
Wp m g
h
=
Pe
Wmi
2
ti
------------
i
T
---------------------
w
=
Pmx
Wmi
ti
------------
max
kW
=
Содержание DDS APS-24
Страница 1: ...DRIVE DDS Hardware manual Ref 1912...
Страница 6: ...6 Ref 1912 DDS HARDWARE 6 I This page intentionally left blank...
Страница 9: ......
Страница 10: ......
Страница 11: ......
Страница 12: ......
Страница 16: ...Ref 1912 DDS HARDWARE 16...
Страница 20: ...Ref 1912 DDS HARDWARE 20...
Страница 179: ...3 Drives Ref 1912 179 DDS HARDWARE...
Страница 180: ...3 Drives Ref 1912 DDS HARDWARE 180...
Страница 200: ...4 AUXILIARY MODULES Auxiliary modules Ref 1912 DDS HARDWARE 200...
Страница 260: ...7 Cables Ref 1912 DDS HARDWARE 260...
Страница 397: ...Sales models 12 Ref 1912 397 DDS HARDWARE 12 9 Order example F H12 21 Order example...
Страница 404: ...13 Compatibility Ref 1912 DDS HARDWARE 404...
Страница 405: ......