Fuji Electric Frenic lift, Справочное руководство

Страница: 167 / 254

Reference speed (final)
Detected speed
Detected speed
Torque
command
Torque
command
0
0
0
0
Speed
Torque output
Speed
Torque output
Time
FF control disabled
(only PI feedback control enabled)
FF control enabled
(PI feedback control enabled together)
Reference speed (final)
Time Time
Time
The effect above can be obtained also by adjusting the P and I constants to speed up the response,
but it involves any demerits such as resonance of machinery and vibration noise.
L49 Vibration Suppression Observer (Gain)
L50 Vibration Suppression Observer (Integral time)
L51 Vibration Suppression Observer (Load inertia)
L49 through L51 specify the mechanical inertia for the vibration suppression observer. The observer
runs the simulation model inside the inverter, estimates a load torque (that can be a vibration
element), and applies it to the reference torque for canceling the load torque. This way the observer
quickly attenuates the vibration caused by resonance of machinery.
■
Gain (L49)
L49 specifies the compensation gain for the vibration suppression observer. Setting 0.00 disables the
observer.
Usually set the gain within the range from 0.00 to 0.50.
- Data setting range: 0.00 (Disable)
0.01 to 1.00
■
Integral time (L50)
L50 specifies the integral time of the observer. No change is required except special cases.
- Data setting range: 0.005 to 1.000 (s)
■
Load inertia (L51)
L51 specifies the moment of inertia of the load. After converting the moment of inertia of the motor
and traction machine for the motor shaft, use the value.
- Data setting range: 0.01 to 655.35 (kgm
2
)
L52 Start Control Mode
F23 (Starting Speed)
L52 specifies the start control mode.
Data for L52 Function
0 Enable speed start mode.
1 Enable torque start mode.

For details, refer to the description of F23.
2-154