10. CHARACTERISTICS
10 - 2
10.2 Power supply capacity and generated loss
Calculate the generated loss and the power supply capacity of the servo amplifier under rated load from (1)
and (2) in this section. The calculated value will vary depending on the number of connected servo motors
and the capacities of the servo motors. For thermal design of an enclosed type cabinet, use the values
calculated 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 run at less than the rated speed, the power supply capacity will be smaller than the
calculated value, but the servo amplifier's generated heat will not change.
(1) Calculation method of power supply capacity
Calculate the power supply capacity for one servo amplifier from tables 10.1 and 10.2.
Table 10.1 Power supply capacity for
one servo amplifier at rated output
Table 10.2 Servo amplifier power
supply capacity for one servo motor
Servo amplifier
(Note)
Power supply capacity
[kVA]
Servo motor
Power supply capacity
[kVA]
(A)
MR-J4W2-22B
Total power supply
capacity of connected
servo motors ((A) in
table 10.2)
HG-KR053
0.3
MR-J4W2-44B
HG-KR13
0.3
MR-J4W2-77B
HG-KR23
0.5
MR-J4W2-1010B
HG-KR43
0.9
MR-J4W3-222B
HG-KR73
1.3
MR-J4W3-444B
HG-MR053
0.3
Note.
The power supply capacity will vary
according to the power supply impedance.
This value is applicable when the power
factor improving reactor is not used.
HG-MR13
0.3
HG-MR23
0.5
HG-MR43
0.9
HG-MR73
1.3
HG-SR51
1.0
HG-SR81
1.5
HG-SR52
1.0
HG-SR102
1.7
HG-UR72
1.3
HG-JR53
1.0
HG-JR73
1.3
HG-JR103
1.7
Calculate the power supply capacity with equation 10.1 below.
Power supply capacity [kVA] = Sum of power supply capacity (A) of the connected servo motors ·· (10.1)
For example, when a HG-KR43, HG-KR23, and HG-KR053 are connected to an MR-J4W3-444B servo
amplifier, according to table 10.1, the power supply capacity of each servo motor is as follows: HG-KR43
= 0.9 [kVA], HG-KR23 = 0.5 [kVA], HG-KR053 = 0.3 [kVA]. Calculate the values with equation 10.1.
Power supply capacity [kVA] = 0.9 + 0.5 + 0.3 = 1.7
Under the above conditions, the power supply capacity of the servo amplifier is 1.7 [kVA].
Summary of Contents for MR-J4W2-0303B6
Page 39: ...2 INSTALLATION 2 8 MEMO ...
Page 97: ...4 STARTUP 4 20 MEMO ...
Page 181: ...6 NORMAL GAIN ADJUSTMENT 6 28 MEMO ...
Page 235: ...9 DIMENSIONS 9 6 MEMO ...
Page 245: ...10 CHARACTERISTICS 10 10 MEMO ...
Page 309: ...13 USING STO FUNCTION 13 14 MEMO ...
Page 365: ...15 USING A DIRECT DRIVE MOTOR 15 24 MEMO ...
Page 389: ...16 FULLY CLOSED LOOP SYSTEM 16 24 MEMO ...
Page 461: ...17 APPLICATION OF FUNCTIONS 17 72 MEMO ...
Page 556: ...APPENDIX App 41 ...
Page 585: ...MEMO ...