Speed and torque control parameter group11
PARAMETER DESCRIPTION 235
Note: 1. Increase 11-00(P.320) / 11-03(P.323) / 11-23(P.412) speed control gain can elevate response. But set too high can
generate vibration and noises.
2. Reduce 11-01(P.321) / 11-04(P.324) / 11-24(P.413) speed control integral coefficient can shorten the time required
to go back to the original speed. But if the value is too small, overshoot can happen.
3. When the setting value of 11-06(P.326) is increased, the response of the current regulator is improved, but if the
setting value is too large, the current control will oscillate and there will be a large electromagnetic noise.
5.12.2 IM motor estimated speed filtering time
Set the estimated low-pass filter time for the speed of the IM motor in sensorless vector control.
IM motor estimated speed
filtering time
Only valid when 00-21(P.300)=3
IM motor estimated speed filtering time
When in sensorless vector control, if the motor control oscillates, 11-26 (P.415) can be properly adjusted, usually
no setting is required.
5.12.3 PM motor setting
The parameters setting below can improve the VC and SVC control characteristic of PM motor.
PM motor initial
position detection
method
id given at acceleration, valid only when 00-21=6
PM motor constant
speed id
id given at constant speed, valid only when 00-21=6
PM motor estimated
speed filtering time
PM motor estimated rotation speed filter time constant, valid
only when 00-21=6
PM motor control setting
11-08
(P.328)
is used to select how the rotor position is detected at PM motor start. In PM motor close-loop vector
control
mode, inverter performs a magnetic pole search the first time it starts the motor. After that, rotor position is
calculated from the PG encoder signal and saved until the inverter power is switched off.
When 11-08
(P.328)
=0, detect initial magnetic pole position of the rotor by using pull-in method, the motor cannot
start with heavy duty, or it may fail to start.
When 11-08
(P.328)
=1, detect the initial magnetic pole position of the rotor by using high frequency pulse vibration
method, electromagnetic noise may be generated from the motor at start.
11-09
(P.329)
is the current for pulling in the pole when PM motor starts. 05-05
(P.306)
(motor rated current) is set to
100%, setting the pull-in current during acceleration/deceleration, adjustments to this setting may help in the
following situations:
Increase this setting when a large amount of starting torque is required.Lower this setting if there is excessive