BENSHAW RSi H2 Series - Page 266

Sensorless Vector Control
254
890053-00-02
Problem
Relevant function code
Troubleshooting
operate due to an inverter
overload fault.
2. Speed search fails when the a
load exceeding the rated load is
applied to the motor at each
speed section, or a current equal
to or exceeding 150% of the
rated current is supplied to the
motor.
Try increasing the value (100%) at MOT-20 in
5% increments.
A fault occurs when the motor
tries to start up or accelerate
from a free run at certain speed
range.
CON-71 Speed Search
During a PM synchronous motor operation in
sensorless vector mode, the motor starts up
after the initial pole position detection is made.
To accelerate the motor in a free-run state,
enable speed search at acceleration by setting
bit 0 (0001) at CON-71 (Speed Search).
During a low speed operation,
the output speed search
becomes unstable when a
massive load exceeding the
rated load is abruptly applied to
the motor.
CON-35 ASR I Gain 1
CON-47 PMdeadVolt
Per
The motor control may become unstable due to
input voltage deviation during a low-speed
operation with low voltage input.
Try decreasing the values at CON-35 and
CON-47 in 10% decrements.