Mitsubishi Electric MR-J4, Instruction Manual

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18. MR-J4-03A6 SERVO AMPLIFIER
18 - 76
18.7.2 Power supply capacity and generated loss
Table 18.4 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 the servo
motor is operated under the rated speed, required power supply capacities for main circuit will be less than
the value of the table.
Table 18.4 Power supply capacity and generated heat per servo amplifier at rated output
Servo motor
Main circuit (48 V DC/24 V DC)
Required power supply
capacity [W]
(Note)
Servo amplifier-generated heat [W]
At rated output With servo-off
HG-AK0136 230 6 1
HG-AK0236 360 9 1
HG-AK0336 480 13 1
Note. Heat generated during regeneration is not included in the servo amplifier-generated
heat.
18.7.3 Dynamic brake characteristics
POINT
The dynamic brake of MR-J4-03A6 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.
PF09] and [Pr. PF15].