Delta Electronics VFD-VE, User Manual

Page: 158 / 313

Chapter 4 Parameters
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Revision Dec. 2008, 04VE, SW V2.05 4-105
When Pr.05-12 is set to 1, the drive will select by Pr.05-11 setting and current motor frequency
to switch motor to Y-connection or
Δ−
connection.  AT the same time, it will also affect motor
parameters (Pr.05-01 to 05-10/Pr.05-13 to Pr.05-21).
Pr.05-30 is used to set the switch delay time of Y-connection/
Δ −
connection.
When output frequency reaches Y-connection/
Δ −
connection switch frequency, drive will delay
by Pr.05-30 before multi-function output terminals are active.
Y- connection switch: can be used for wide range motor
Y connection for low speed: higher torque can be used for rigid tapping
U
V
W
MI1
MI2
RA
MRA
Pr.02-01~06=30
Pr.02-01~06=29
Pr.02-11~14=32
Pr.02-11~14=31
IM
U V W
X Y Z
connection for high speed: higher torque can be used for high-speed drilling
connection is finished
Y-connection is finished
connection control
Y connection control
Y-connection
confirmation input
Pr.05-11
Y- switch
frequency
△
Y-connection output
Y-conenction
confirmation input
△
-connection output
Pr.02-11~14=32
△
-connection
confirmation input
Pr.02-11~14=30
ON ON
Pr.02-11~14=31
ON
Pr.02-11~14=29
ON
ON
ON
If switch point is 60Hz,
the accel. switch point is 62Hz
Motor speed/
frequency
Bandwidth is 2Hz
:
mechanical bounce time
Decel. switch point is 58Hz
In this area, motor is in free
run status. AC motor drive
stops outputting.
Motor speed will
decrease
by load inertia.
Pr. 05-30 Delay Time for Y-connection
/D -connection(Min. is 0.2 seconds)
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