Power Supply Capacity And Generated Loss - Mitsubishi Electric MR-J4W2-0303B6 Instruction Manual

18. MR-J4W2-0303B6 SERVO AMPLIFIER

18.7.2 Power supply capacity and generated loss

Table 18.3 indicates the required power supply capacities for main circuit and losses generated under rated
load of the servo amplifier. For thermal design of an enclosed type cabinet, use the values in the table in
consideration for the worst operating conditions. The actual amount of generated heat will be intermediate
between values at rated torque and servo-off according to the duty used during operation. When operating
the servo motor under the rated speed, required power supply capacities for main circuit will be less than the
value of the table.
The values in the table show when the same servo motors are used for both A axis and B axis. When using
different servo motors, estimate the values with an average of the two motors.
18.7.3 Dynamic brake characteristics
Table 18.3 Power supply capacity and generated heat per servo amplifier at
rated output
Main circuit (48 V DC/24 V
Servo motor
(×2) Required power supply
HG-AK0136
HG-AK0236
HG-AK0336
Note. Heat generated during regeneration is not included in the servo amplifier-generated heat.
POINT
The dynamic brake of MR-J4W2-0303B6 is an electronic type.
Do not use dynamic brake to stop in a normal operation as it is the function to
stop in emergency.
Be sure to enable EM1 (Forced stop 1) after servo motor stops when using EM1
(Forced stop 1) frequently in other than emergency.
The time constant "τ" for the electronic dynamic brake will be shorter than that of
normal dynamic brake. Therefore, coasting distance will be longer than that of
normal dynamic brake. For how to set the electronic dynamic brake, refer to [Pr.
PF06] and [Pr. PF12].
(Note) Servo amplifier-generated heat [W]
DC)
capacity [W]
460
720
960
18 - 47
At rated output With servo-off
13
19
27
3
3
3