Table of Contents
Advertisement
• The inverter may not provide sufficient performance characteristics if the motor is two or more sizes
smaller than the maximum applicable motor capacity. This is because the inverter requires a current
accuracy of at least 50% of the rated current.
• If sensorless vector control does not provide the intended performance characteristics, adjust the
motor parameters depending on the phenomenon, as shown in the following table.
Opera-
tion sta-
tus
Actual motor speed is
lower than target
speed.
Power
running
Actual motor speed is
higher than target
speed.
Torque is insufficient at
Regener-
low frequencies (a few
ation
Hz).
Shock occurs during
startup.
During
Motor rotates momen-
startup
tarily in opposite direc-
tion to instructed rota-
tional direction.
At decel-
Motor is hunting.
eration
Torque becomes insuf-
During
ficient at low frequen-
torque
cies when torque limit
limit
is enabled.
Low fre-
quency
Rotation is unstable.
operation
Output Torque Monitor Function
This function monitors the output torque value.
To monitor the output torque value on the Digital Operator, either set Operator Display Selection dur-
ing Run (E43) to "8: Calculated torque," or monitor in monitor mode 3_04.
When monitoring by a signal on the control terminal block, refer to 7-3-5 Analog Output Function Se-
lection on page 7-46.
Parameter No.
E43
F31
M1 Series Standard Type User's Manual (I669)
Phenomenon
Increase the slip compensation gain (drive) or
rated slip gradually.
Increase %R1 and no-load current gradually.
Adjust the speed control P gain.
Set rotational direction limitation.
Adjust the speed control P gain.
Decrease the torque limit.
Adjust the speed control P gain.
Function name
Operator Display Se-
8: Calculated torque
lection during Run
Output Terminal [AO]
4: Output torque
Function Selection
29: Output torque (Bipolar)
6 Vector Control and Applied Functions
Description of adjustment
Data
Adjustment item
P09/A23
P12/A26
P07/A21
P06/A20
d03/A45
H08
d03/A45
F40
F41
E16
E17
d03/A45
Default data
Unit
0
-
0
-
6-19
6
Hide quick links:
Advertisement
Table of Contents
