Mitsubishi Electric MELSERVO-J4 series, Instruction Manual

Page: 321 / 646

10 CHARACTERISTICS
10.3 Dynamic brake characteristics
319
10
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
• HG-KR series
• HG-SR1000 r/min series
• HG-SR2000 r/min series
0
10
20
30
40
50
0 1000 2000 3000 4000 5000 6000
73
43
23
13
053
Servo motor speed [r/min]
Dynamic brake time
constant [ms]
Dynamic brake time
constant [ms]
0
10
20
30
40
50
0 1000 2000 3000 4000 5000 6000
73
43
23
13
053
Servo motor speed [r/min]
121
0
20
40
60
80
100
0 250 500 750 1000 1250 1500
51 81
201
301
421
Dynamic brake time
constant [ms]
Servo motor speed [r/min]
0 500 1000 1500 2000 2500 3000
52
102
0
100
50
200
150
250
300
350
352
202
702
152 502
Dynamic brake time
constant [ms]
Servo motor speed [r/min]