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10. CHARACTERISTICS
10 - 7
(2) Heat dissipation area for an enclosed type cabinet
The enclosed type cabinet (hereafter called the cabinet) which will contain the servo amplifier should be
designed to ensure that its temperature rise is 10 °C at the ambient temperature of 40 °C. (With
an approximately 5 °C safety margin, the system should operate within a maximum 55 °C limit.) The
necessary cabinet heat dissipation area can be calculated by equation 10.1.
A =
K •
P
T
················································································································· (10.1)
A
P
∆
T
K
: Heat dissipation area [m
2
]
: Loss generated in the cabinet [W]
: Difference between internal and ambient temperatures [°C]
: Heat dissipation coefficient [5 to 6]
When calculating the heat dissipation area with equation 10.1, assume that P is the sum of all losses
generated in the cabinet. Refer to table 10.1 for heat generated by the servo amplifier. "A" indicates the
effective area for heat dissipation, but if the cabinet is directly installed on an insulated wall, that extra
amount must be added to the cabinet's surface area. The required heat dissipation area will vary with
the conditions in the cabinet. If convection in the cabinet is poor and heat builds up, effective heat
dissipation will not be possible. Therefore, arrangement of the equipment in the cabinet and the use of a
cooling fan should be considered. Table 10.1 lists the cabinet dissipation area for each servo amplifier
(guideline) when the servo amplifier is operated at the ambient temperature of 40 °C under rated load.
(Outside the cabinet)
(Inside the cabinet)
Air flow
Fig. 10.2 Temperature distribution in an enclosed type cabinet
When air flows along the outer wall of the cabinet, effective heat exchange will be possible, because the
temperature slope inside and outside the cabinet will be steeper.
Summary of Contents for MR-J4-100A(-RJ)
Page 19: ...10 MEMO ...
Page 75: ...1 FUNCTIONS AND CONFIGURATION 1 56 MEMO ...
Page 83: ...2 INSTALLATION 2 8 MEMO ...
Page 159: ...3 SIGNALS AND WIRING 3 76 MEMO ...
Page 203: ...4 STARTUP 4 44 MEMO ...
Page 351: ...7 SPECIAL ADJUSTMENT FUNCTIONS 7 40 MEMO ...
Page 365: ...8 TROUBLESHOOTING 8 14 MEMO ...
Page 387: ...9 DIMENSIONS 9 22 MEMO ...
Page 403: ...10 CHARACTERISTICS 10 16 MEMO ...
Page 553: ...12 ABSOLUTE POSITION DETECTION SYSTEM 12 30 MEMO ...
Page 567: ...13 USING STO FUNCTION 13 14 MEMO ...
Page 607: ...14 COMMUNICATION FUNCTION MITSUBISHI ELECTRIC GENERAL PURPOSE AC SERVO PROTOCOL 14 40 MEMO ...
Page 639: ...15 USING A LINEAR SERVO MOTOR 15 32 MEMO ...
Page 767: ...18 MR J4 03A6 RJ SERVO AMPLIFIER 18 84 MEMO ...
Page 856: ...APPENDIX App 41 ...
Page 905: ...MEMO ...