9. SPECIFICATIONS
9-51
9.1.15 Dynamic Brake
(1) Slowing-down revolution angle by dynamic brake
Fig. 9-21
N : Motor speed (min
-1
)
l
1
: Slowing-down revolution angle (rad) by AMP
internal processing time t
D
.
l
2
: Slowing-down revolution angle (rad) by dynamic
brake operation.
t
D
: Delay time (sec) from occurrence of a signal until
the start of operation.
(Based on AMP capacity. Refer to the following
table.)
[Standard expression] Supposing the load torque (T
L
) is zero
I = I
1
+ I
2
= + (J
m
+ J
L
) × (αN + βN
3
) × 2
I : Overall slowing-down revolution angle (rad)
J
m
: Motor inertia (kg・m
2
)
J
L
: Load inertia (calculated in terms of motor shaft) (kg・m
2
)
α•β : Constant related to motor. See Table 9-16.
Table 9-14
Amplifier model No. Delay time t
D
(S)
PY2A015
PY2E015
10 × 10
-3
PY2A030
PY2E030
10 × 10
-3
PY2A050 24 × 10
-3
2πN • t
D
60
Speed
Time
N
l
2
l
1
t
D
The slowing-down revolution angle of the PY2 amplifier is twice that of our conventional PY,
PZ or PE series in the worst case.