7 control parameters, Control parameters – Lenze EDB9300UES User Manual
Page 133
Operation and Software
128
BA8230
4.4.7 Control parameters
Control structure
Parameter for setting the control structure.
The control structure can only be changed when the drive is at a standstill (pulses
disabled).
Select list:
- Speed control without encoder
- Speed control with encoder
- Frequency control
- Torque control without encoder
- Torque control with encoder
As supplied:
Speed control without encoder
Speed control without encoder:
Speed control without an encoder is provided in this control structure. A pseudo
speed actual value is used. Load-dependent frequency following occurs through a
rotor model which calculates the slip frequency. Furthermore, load-dependent voltage
following which is supported by the rotor and magnetising current controllers is also
provided by preliminary control through a voltage model.
Speed control with encoder:
This control structure provides speed control with speed feedback. It uses a speed
actual value which is detected by pulse encoders and the optional rotation encoder
interface.
Load-dependent frequency following is produced by a rotor model which calculates
the slip frequency. Furthermore, load-dependent voltage following supported by the
rotor and magnetising current controllers is also provided by preliminary control
through a voltage model.
The current limiter is activated when the current critical value monitor responds. An
excessively steep acceleration ramp is extended by pauses in acceleration.
Frequency control:
In the frequency control structure the drive is controlled at its U/f characteristic.
Drive acceleration and braking are according to the ramp settings.
The pulses are disabled if the current critical value limiter responds when an
acceleration ramp is set too steeply.
No load-dependent frequency and voltage following take place.
Suitable for operating:
- Low power asynchronous AC motors
- Multiple motor drives
- AC reluctance motors
- AC asynchronous motors
- All applications with a fixed frequency and voltage setting.
Show/Hide Bookmarks