Varispeed G7 Control Methods
10-5
10
îš„V/f Control with PG (A1-02 = 1)
V/f control with a PG enables precise control of machine line speed. Speed control using the speed feedback
of the machine shaft is possible in this mode.
Fig 10.2
îš„Open-loop Vector Control (A1-02 = 2 or 4)
Open-loop vector control enables the use of high-performance drives without a speed detector. PG (pulse gen-
erator) wiring is not required.
Fig 10.3
îš„Flux Vector Control (A1-02 = 3)
Flux vector control is suitable for applications using high-precision drives with PG feedback. High-precision
positioning, zero-speed control, and torque control are possible with this mode.
Fig 10.4
Inverter
M
PG
PG Speed Control Board
(PG-A2 or PG-D2)
Conveyor
Inverter
M
Inverter
M
PG
PG Speed Control Board
(PG-B2 or PG-X2)
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