YASKAWA Varispeed-505WII - No-Load Operation; Full-Load Operation; Adjustment

TEST
RUN

(Cont'd
)
NO-LOAD OPERATION
After making the checks specified before test
run,
thoroughly check the environment of the system for
safety .
Check the polarity of DC tachometer generator
feedback voltage . When the motor is running forward,
the polarity of VS-505WIl signal terminal 2 (3 :

0 V) is
minus and it
is plus during reverse running of the motor .
Then, run the motor without load according to
Table 4 .
FULL-LOAD
OPERATION
Before starting full-load operation, stop the power
supply, couple the DC motor to the driven machine, and
check the motor and the driven machine for safe and
obstruction-free conditions . Table 5 gives full-load
operation procedure .
Table 4 No-load Operation
* VS-505W11 . rated 220
V . 45 A and above and460 V . 90 A and above are
provided with a
thyrlstor cooling fan .
6
ADJUSTMENT
Do not tamper unnecessarily with the potentiometers on
the control circuit board since they have been adjusted
at the factory before shipped .
Adjuster
Locations and Functions
Adjuster locations on the control
circuit board and
functions
are shown in rig . 8 and Table 6 .
The
characteristics of control circuit board check
terminals
are shown in :Fig . 9 and Table 7 .
0
sx
V
~
0
Fig . 8 Adjuster Locations on
Control
Circuit Board
'fable 5 Full-load Operation
Order Operation Check Items
9
1
Set the speed reference
at zero .
2 Turn on main circuit Smooth rotation of the
powersuppy . thyristor cooling fan .
Smooth rotation of the
blower for DC motor .
Rotating direction of the
blower
meets with the mark-
ing on the blower .
3 Make an operationalse- Indication light "PREP" on
quence and check to be the control board(1PCB)
sure that operation is turns on .
ready . (Turn
on ready
signal, motor
cooling
fan
ON /OFF signal .)
4
Turn-on the operation
signal .
5 Gradually, increasethe Smooth acceleration of DC
speed setting value . motor .
No abnormalodor, smoke,
vibration and noise on DC
motor .
6
Remove the hand-hole No brush chattering and
cover and check the
I
sparking at thebrushes .
commutator .
To avoid excessive temperature rise of DC motor
winding in frame 112, 132, reclose the window
within 5 minutes .
7 Gradually,turn the Smooth
acceleration of
DC
speed setting potentiom- motor .
eter clockwise .
8
' Increase the speed
set-
DC
motor rotates at the
ting value to the maxi- maximum
speed
. Check
mum . with a speedometer
.
9 Change the
speed to DC motorspeed corre-
various values
. sponds with the set values .
10 Turn off the
operation
DC
motor suddenly
stops .
signal .
11 Turn off the
main cir-
cult power supply .
Order Operation
1 Se t the speed at zero .
2 Turn o n th e main circ
u it power supply .
3 Turn on operation signal and gradually
increase the speed .
Check to be sure
that the motor and driven machine are
correctly r
u nning .
4 Tu rn off the ope r ati on sig n
al .
5 Tu rn of f ma i n circuit power supply .