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Chapter 2 OUTLINE OF SJ-FB
This manual describes the application board SJ-FB for a SJ300 series inverter.
This SJ-FB board, assembled in a SJ300 inverter, detected the rotation speed of a motor with the
encoder and feedback the motor speed to suppress speed fluctuations for highly accurate operation.
This SJ-FB board can also be used for controlling motor stop positions by entering 90 phase
difference pulses, as well as for synchronized operation, orientation function, and external torque
limit input function.
Figure 2-1 Function Block Diagram
NOTE: Not vector control (ACR control)
PWM M
EC
Current
control
Torque
limiter
Speed
control
Inside
setting
LAD
Turn
several
detection
Position
detection
Zero speed
detection
Speed deviation
excessive signal
Position
control
Orientation
control
SJ-FB
Inverter main body
EAP,EAN
EBP,EBN
EZP,EZN
EP5,EG5
AP,AN
BP,BN
DSE ZS
POK
LAC
PCLR
ORT
SAP,SAN
SBP,SBN
TH
STAT