Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 276

Calculation of tolerance against instantaneous power failure
The following shows tolerance against instantaneous power failure when instantaneous power failure voltage is "rated voltage
 50%" and instantaneous power failure time is 200 ms.
Servo amplifier
MR-J4-10GF(-RJ)
MR-J4-20GF(-RJ)
MR-J4-40GF(-RJ)
MR-J4-60GF(-RJ)
MR-J4-70GF(-RJ)
MR-J4-100GF(-RJ)
MR-J4-200GF(-RJ)
MR-J4-350GF(-RJ)
MR-J4-500GF(-RJ)
MR-J4-700GF(-RJ)
MR-J4-11KGF(-RJ)
MR-J4-15KGF(-RJ)
MR-J4-22KGF(-RJ)
MR-J4-60GF4(-RJ)
MR-J4-100GF4(-RJ)
MR-J4-200GF4(-RJ)
MR-J4-350GF4(-RJ)
MR-J4-500GF4(-RJ)
MR-J4-700GF4(-RJ)
MR-J4-11KGF4(-RJ)
MR-J4-15KGF4(-RJ)
MR-J4-22KGF4(-RJ)
Instantaneous maximum output means power which servo amplifier can output in maximum torque at rated speed. You can
examine margins to compare the values of following conditions and instantaneous maximum output.
Even if driving at maximum torque with low speed in actual operation, the motor will not drive with the maximum output. This
can be handled as a margin.
The following shows the conditions of tolerance against instantaneous power failure
■Delta connection
For the 3-phase (L1/L2/L3) delta connection, an instantaneous power failure occurs in the voltage between a pair of lines (e.g.
between L1 and L2) among voltages between three pairs of lines (between L1 and L2, L2 and L3, or L3 and L1).
■Star connection
For the 3-phase (L1/L2/L3/neutral point N) star connection, an instantaneous power failure occurs in the voltage between a
pair of lines (e.g. between L1 and N) among voltages at six locations, between three pairs of lines (between L1 and L2, L2 and
L3, or L3 and L1) and between one of the lines and the neutral point (between L1 and N, L2 and N, or L3 and N).
7 SPECIAL ADJUSTMENT FUNCTIONS
274
7.4 Compliance with SEMI-F47 standard
Instantaneous maximum output [W]
350
700
1400
2100
2625
3000
5400
10500
15000
21000
40000
50000
56000
1900
3500
5400
10500
15000
21000
40000
50000
56000
Tolerance against instantaneous power
failure [W] (voltage drop between lines)
250
420
630
410
1150
1190
2040
2600
4100
5900
2600
3500
4300
190
200
350
730
890
1500
2400
3200
4200