LSIS LSLV-S100 User Manual

Learning Advanced Features
201
Guidelines for Running a PM Synchronous Motor in
Sensorless Vector Control Mode
Problem
Relevant function
code
Troubleshooting
Starting torque is insufficient.
Cn.48 ACR P-Gain
Cn.39 PMdeadBand
Per
Cn.40 PMdeadVolt
Per
If an overcurrent trip occurs at startup, try
decreasing the value at Cn.48 in 10%
decrements.
Try increasing the value at Cn.39 or
Cn.40 in 10% increments.
The motor hunts when
starting up.
Cn.40 PMdeadVolt
Per
Try decreasing the value at Cn.40 in 10%
decrements.
The motor hunts with
regenerative load at low
speed (10Hz or lower), or an
“OCT” fault trip occurs.
Cn.40 PMdeadVolt
Per
Try increasing the value at Cn.40 in 10%
increments.
The motor hunts* or the
torque is not sufficient while
the load is increasing at low
speed (10Hz or lower).
Cn.04 Carrier Freq
Cn.12 ASR P Gain 1
Cn.13 ASR I Gain 1
If the motor hunts at low speeds, try
increasing the value at Cn.13 in 50 msec
increments. If the motor does not hunt, try
increasing the value at Cn.12 in 10%
increments until the motor runs in an
optimal operation condition.
If the motor hunts and the torque is not
sufficient at 5–10Hz speed range, and if
the carrier frequency at Cn.04 is set to
more than 3 kHz, try decreasing the value
in 1 kHz decrements.
The motor hunts excessively
during no-load operation
when rated current is
supplied to the motor.
Cn.12 ASR P Gain 1
Cn.13 ASR I Gain 1
Cn.15 ASR P Gain 2
Cn.16 ASR I Gain 2
Try decreasing the speed controller gains
at Cn. 12–16 in 30% decrements.
The value at bA.30 (PM Flux
Ref) becomes “0” after
performing an auto tuning
operation by setting bA. 20 to
7 [All (PM)].
bA.11 Pole Number
bA.15 Rated Volt
dr.18 Base Freq
Refer to the motor’s rating plate and set
the pole number at bA.11 (Pole Number),
or enter a calculated pole number: Pole
Number = (120 x BaseFreq/BaseRPM)
Refer to the motor’s rating plate and set
the rated voltage and base frequency at
bA-15 (Rated Volt) and dr.18 (Base Freq),
and then run auto tuning again by setting
bA-20 (Auto Tuning) to 7 [All (PM)].
Fault trips occur after a static
auto tuning.
bA.21 Rs
bA.28 Ld (PM)
bA.29 Lq (PM)
bA.30 PM Flux Ref
Motor operation may fail if a static PM
auto tuning result is not accurate. Refer to
the motor’s rating plate and set the motor-
related parameters again.
“OVT” occurs due to abrupt
acceleration, deceleration, or
Cn.16 ASR I Gain 2
Try decreasing the value at Cn.16 in 5%
decrements.

LSIS LSLV-S100 Specifications

General

Brand	LSIS
Model	LSLV-S100
Category	Controller
Language	English