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13 - 2 13. SERVO AMPLIFIERS WI TH A LARGE CAPACITY ( 30k TO 55kW ) 13.1.1 Function block diag ram The function block diagram of this servo is shown below. L L 11 L 21 L 1 L 2 L 3 P 1 P 2 C L 11 L 21 L L L Power supply Co…

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13 - 1
13. SERVO
AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)
13. SERVO AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)
This chapter explains the MELSERVO-J3-B series AC servo featuring a large capacity of 200V (30k to
37kW)/400V (30k to 55kW).
Explanation made in this chapter is exclusively for the MR-J3-CR
(4) converter units and the MR-J3-DU B(4)
drive units. Explanations on the following items are the same as those for servo amplifiers with 22kW or less.
For such explanations, refer to the section indicated in the table.
Item Reference
Startup Chapter 4
General gain adjustment Chapter 6
Special adjustment functions Chapter 7
Absolute position detection system Chapter 12
13.1. Functions and menus
POINT
Explanations on the following item are the same as those for servo amplifiers
with 22kW or less. Refer to the section below for details.
Function list section 1.4
13 - 2
13. SERVO AMPLIFIERS WITH A LARGE CAPACITY
(
30k TO 55kW
)
13.1.1 Function block diagram
The function block diagram of this servo is shown below.
L
L
11
L
21
L1
L
2
L3
P
1
P
2
C
L
11
L21
L
L
L
Power
supply
Control
power
supply
Base
amplifier
MC
CN1
I/F
CHARGE
lamp
Converter
NFB
Cooling fan
CPU
Trouble, warning, forced stop
CN40
Converter unit
protection coordination
CN40
Power factor
improving DC
CNP1
MC drive
Regenerative
option
Regenerative
TR
Diode
stack
Thyristor
Current
detection
Voltage
detection
13 - 3
13. SERVO AMPLIFIERS WITH A LARGE CAPACITY
(
30k TO 55kW
)
Model position
control
Model speed
control
L
L
L
L
Current
control
Actual speed
control
Actual position
control
OHS2
Optional battery
(For absolute position detection
system)
Termination
connector
MR-J3-TM
(Option)
CN40
BU
BV
BW
U
V
W
Over
current
Control
power
supply
Current
detector
NFB
Power
supply
(Note)
CN40ACN40B
CN5
USB
USB
Personal
computer
CN4
MR-J3BAT
Controller
or
drive unit
Drive unit
or
cap
CN1A CN1B
CN3
D/A
Analog monitor
(2 channel)
Digital I/O
control
Servo motor
Drive unit
L
11
L
11
L
21
L
21
Cooling fan
Base amplifier
U
V
W
M
CN2
Servo motor
thermal
OHS1
Current
detection
Virtual
encoder
Position command
input
Model position Model speed
Virtual
motor
I/F
Control
Encoder
Model torque
Cooling fan
Note. Refer to section 13.3.6 for the power supply specification of the servo motor cooling fan.