Mitsubishi MELDAS HS Series Specifications And Instruction Manual page 129

Example
The regeneration energy is obtained for when the axis stops from the rated speed while a
load with the same inertia as the motor is connected to the HC52 motor.
Regeneration energy ER is calculated using expression (11-6) below.
= 5.48 × 10
E
R
Servomotor reverse effect and amplifier charging energy
Motor reverse
Servomotor
effect η
HS-MF23 0.70
HS-RF43 0.85
HS-RF73 0.85
The regenerative energy is the value for when the amplifier input power
voltage is 220 V.
POINT
If the input voltage is higher than this, the charging energy will decrease and
the regeneration energy will increase.
(2) For an unbalance axis
The regenerative energy differs in the upward stop and downward stop for an unbalance axis. A
constant regeneration state results during downward movement if the unbalance torque is the
same as or larger than the friction torque.
A regeneration state only occurs when deceleration torque (downward torque) is generated.
= 5.24 × 10
E
RU
A regeneration state occurs even during constant rate feed when the upward torque Ts
during dropping is generated.
Calculated so that Ts = 0 when Ts is downward.
2π · η · Ts · L
E =
RD
One return is assumed to be one cycle, and the regeneration energy per cycle (E
using expression (11-9).
E = E + E
R RU
Chapter 11 Selection
− 7
× 0.85 × (6.6 + 6.6) × 2000
Charging energy
Ec (J)
9
16
16
Regeneration energy
− 5
· η · T · N · td − Ec (J) ...................................................... (11-7)
du
+ 5.24 × 10
∆S
(J)
RD
11–11
− 11 = 13.6 (J)
2
Motor reverse
Servomotor
HS-SF52
HS-SF53
HS-SF102
HS-SF103
HS-SF202
η
: Motor reverse efficiency
T : Upward stop deceleration torque
du
N : Motor speed
td : Deceleration time (time constant)
Ec : Amplifier charging energy
− 5
· η · T · N · td − Ec (J)....................... (11-8)
dd
η
: Motor reverse efficiency
Ts : Upward torque during dropping
L : Constant rate travel
∆S : Travel per motor rotation
T : Downward stop deceleration torque (N· m)
dd
N : Motor speed
td : Deceleration time (time constant)
Ec : Amplifier charging energy
......................................... (11-9)
Charging energy
effect η
Ec (J)
0.85 12
0.85 12
0.85 22
0.85 22
0.85 40
(N m)
(r/min)
(msec)
(J)
(N· m)
(mm)
(mm)
(r/min)
(msec)
(J)
) is obtained
R