Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 321

For servo amplifier of 7 kW or less, there is internal relay delay time of about 10 ms. For the servo amplifier of 11 kW to 22 kW,
there is delay caused by magnetic contactor built into the external dynamic brake (about 50 ms) and delay caused by the
external relay.
Dynamic brake time constant
The following shows necessary dynamic brake time constant  for equation 10.2.
■200 V class
• HG-MR series
50
40
30
73
20
10
0
0 1000 2000 3000 4000 5000 6000
Servo motor speed [r/min]
• HG-KR series
50
40
30
73
20
10
0
0 1000 2000 3000 4000 5000 6000
Servo motor speed [r/min]
• HG-SR1000 r/min series
100
80
60
40
20
421
0
0 250 500 750 1000 1250 1500
Servo motor speed [r/min]
• HG-SR2000 r/min series
350
300
250
200
52
150
100
50
0
0 500 1000 1500 2000 2500 3000
Servo motor speed [r/min]
43
23
053
13
43
23
053
13
51 81
121
201
301
102
352
152 502
202
702
10 CHARACTERISTICS
10.3 Dynamic brake characteristics
10
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