
8400 motec | Software Manual
Motor control (MCTRL)
Selecting the control mode
62
L
Firmware
≤
02.00 - DMS 2.1 EN - 03/2011
V/f characteristic control - energy-saving (VFCplusEco)
In contrast to the V/f characteristic control mode (VFCplus), this motor control mode uses
a cos
ϕ
control in partial load operational range to automatically reduce the power loss in
the machine (energy optimisation).
The motor data required for the cos
ϕ
control and the V
min
boost (
) and slip
compensation (
) required for optimising the drive behaviour are dimensioned for
machines with power adaptations to the inverter in the Lenze setting.
The required motor data (motor rotor resistance, motor stator resistance, motor stator
leakage inductance and mutual motor inductance) only affect the extent of energy
optimisation but not the stability.
In case of applications with dynamically very high sudden load variations from the
unloaded operation, this motor control mode should not be used since a motor stalling
cannot be excluded.
Energy optimisation for dynamic applications is not possible with this motor control mode.
V/f characteristic control - energy-saving (VFCplusEco)
V/f control (V encoder)
From version 02.00.00
The V/f control can be selected for operating asynchronous motors with speed feedback.
With this motor control, a slip regulator can be additionally parameterised which adjusts
the actual speed value dynamically to the speed setpoint.
Sensorless vector control (SLVC)
Sensorless (field-oriented) vector control is based on a decoupled, separate control for the
torque-producing and the field-producing current component. In addition, the actual
speed is reconstructed by means of a motor model so that a speed sensor is not required.
In comparison to the V/f characteristic control without feedback, the following can be
achieved by means of sensorless vector control SLVC:
A higher maximum torque throughout the entire speed range
A higher speed accuracy
A higher concentricity factor
A higher level of efficiency
The implementation of torque-actuated operation with speed limitation
The limitation of the maximum torque in motor and generator mode for speed-
actuated operation
Содержание 8400 motec Series
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