Table of Contents
Advertisement
Formula
1. Braking time without braking resistor
t
=
Bmin
Valid range: n
1
(Field weakening range)
3. Peak braking power
P
=
B
Condition:
K= 0.25 for motors
0,20 for motors
0.15 for motors
0.08 for motors
0.05 for motors
© KEB, 2012-10
COMBIVERT F5-A, -E, -H
) • (n
(J
+ J
- n
)
M
L
1
2
——————————
9.55 • (K • M
+ M
N
L
> n
N
• n
M
B
1
—————
9.55
P
< P
B
R
upto
1.5 kW
2.2
4 kW
upto
5.5
11 kW
upto
15
45 kW
upto
>
45 kW
2. Braking torque (necessary)
M
B
)
Condition:
4. Braking time with braking resistor
t
Bmin
Valid range: n
1
Condition:
J
= mass moment of inertia motor
M
J
= mass moment of inertia load
L
n
= motor speed prior to deceleration
1
n
= motor speed after deceleration
2
(standstill = 0 rpm)
n
= rated motor speed
N
M
= rated motor torque
N
M
= Braking torque (necessary)
B
M
= load torque
L
t
= braking torque (necessary)
B
t
= minimum braking time
min
t
= cycle time
Z
P
= peak braking power
B
P
= peak power of braking resistor
R
General design
) • (n
(J
+ J
- n
)
M
L
1
2
=
————————
- M
9.55 • t
B
< 1.5 • M
M
B
N
f < 70 Hz
) • (n
(J
+ J
M
L
1
*
————————————————
9.55 • K• M
+ M
+
N
L
> n
N
• 9.55
P
R
< M
——————
(n
- n
)
1
2
f < 70 Hz
P
< P
B
R
L
- n
)
2
• 9.55
P
R
—————
(n
- n
)
1
2
• (1.5 -K)
N
2
[kgm
]
[kgm
2
]
[rpm]
9
[rpm]
[rpm]
[Nm]
[Nm]
[Nm]
[s]
[s]
[s]
[W]
[W]
Page 9.1 - 5
Hide quick links:
Advertisement
Chapters
Table of Contents
