Omron RX - 2, Руководство пользователя

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7 Advanced Settings
High-function General-purpose Inverter RX2 Series User’s Manual
7-2 Sele
ction
of Motor Co
ntro
l Meth
o
d
s
7
7-2
-1
1 Synchronous Motor
(Per
m
anent Magnet
Motor)
Contro
l
*1. On the parameter about the current and the voltage, the figures and the units to be handled vary in the setting
path.
1) Operator or CX-Drive: 0.1 A or 0.1 V (When CX-Drive is operated, set [CF-11] Resister data selection to 00
(A,V). When the data of [CF-11] Resister data selection is not set to 00 (A,V), it is not set or displayed correctly.)
2) Modbus: The current and the voltage vary, depending on the setting of Resister data selection [CF-11].
When [CF-11] Resister data selection is set to 00 (A,V), 0.1 A, 0.1 V
When [CF-11] Resister data selection is set to 01 (%), 0.01% (Rated ratio)
3) Drive programming: 0.01% (Rated ratio)
IMPE Mg-pole
position offset,
1st-motor
[Hd137] 0 to 359°
To conduct corrections in a case where the ini-
tial position estimation operation has a certain
error.
0
DC braking
selection,
1st-motor
[AF101] 01 Internal DC braking: enabled 00
DC braking force at
start, 1st-motor
[AF108] 0 to 100(%)
To adjust the DC braking force. Setting of 100%
will provide maximum braking force.
30
DC braking active
time at start,
1st-motor
[AF109]
0.00 to 60.00
(s)
Enabled during the internal DC braking.
When the operation command is turned ON, DC
braking is started.
0.00
Over current detec-
tion level,
1st-motor
[bb160]
Inverter ND rated
current ×
(0.2 to 2.2)
To Set the level at which the over current is
detected.
2.2 ×
Inverter
ND
rated
current
Phenomenon Estimated cause(s) Exemplar measures to be taken
At the start, rotating
temporarily in the
opposite direction to
the intended one. Misalignment of the
output phases and the
motor’s magnetic-pole
positions
Enable the initial-position estimation function. [Hd132]=01
In the cases of a slight opposite-direction movement even in
the initial-position estimation function, make an adjustment by
incrementing [Hd137] by 5° at a time.
Over current occurs at
the start • Insufficient starting
torque
• Misalignment of the
output phases and
the motor’s mag-
netic-pole positions
• Enable the initial-position estimation function. [Hd132]=01
• Set the DC braking at the start [AF101] = 01, and after the
start, the time needed for the motor to be stabilized is set in
[AF109].
In addition, make an adjustment by incrementing the braking
force at the start [AF108] by 5% each time.
At the start, the motor
loses synchronization
and no acceleration is
observed.
A long starting time is
required.
A long phase-synchro-
nization time is
required. When the magnetic-pole positions are synchronized in the DC
braking at the starting, enable the initial-position estimation
function instead of the DC braking at the start. [Hd132]=01
Fluctuating revolu-
tions occur at low
speeds (at the lowest
frequency (switch) or
even lower)
Insufficient starting
torque Make an adjustment by incrementing the braking force at the
start [AF108] by 5% each time.
Hunting occurs at low
speeds (at the lowest
frequency (switch) or
even lower)
There is a motor con-
stant error.
Decrement the motor constant R [Hd110] little by little until it
reaches a value = set value × 0.7.
Increment little by little each of the motor constant Ld [Hd112]
and the motor constant Lq [Hd112] until they reach their
respective values = set values × 1.4. Note, however that Ld ≤
Lq.
Shock or over current
occurs at about the
lowest frequency
(switch).
The speed response is
too low. Make an adjustment by incrementing the speed response
[HA115] by 5% each time.
Load fluctuation
occurs at around the
switch.
Adjust the lowest frequency (switch) [Hd130].
Item Parameter Data Description
Default
data