Vvw - WEG CFW100 Programming Manual

Note: With the motor nameplate data and for applications with constant torque, the motor optimum efficiency is
normally obtained with the energy saving function active. In some cases, the output current may increase, and then
it is necessary to gradually reduce the value of this parameter to the point in which the current value remains equal
to or below the current value obtained with the function disabled.
For information regarding the actuation of P407 in the VVW control mode, refer to
P588 - EOC Maximum Torque
Range: 0 to 85 %
Properties: cfg
Description:
This parameter defines the torque value to activate the operation of the energy saving function.
Setting this parameter to 0 % disables the function.
It is recommended to set this parameter to 60 %, but it has to be set according the application requirements.
P589 - EOC Minimum Voltage
Range: 40 to 80 %
Properties: cfg
Description:
This parameter defines the minimum voltage value that will be applied to the motor when the energy saving function
is active. This minimum value is relative to the voltage imposed by the V/f curve for a certain speed.
P590 - EOC Minimum Frequency
Range: 12.0 to 400.0 Hz
Properties: cfg
Description:
This parameter defines the minimum speed value at which the energy saving function will remain active.
The hysteresis for the minimum speed level is of 2 Hz.
P591 - EOC Hysteresis
Range: 0 to 30 %
Properties: cfg
Description:
Hysteresis used to activate and deactivate the energy saving function.
If the function is active and the output current oscillates, it is necessary to increase the hysteresis value.
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NOTE!
It is not possible to set those parameters, while the motor is spinning.

8.3 VVW

The VVW vector control mode (Voltage Vector WEG) uses a control method with a much higher performance than
the V/f control because of the load torque estimation and of the control of the magnetic flux in the air gap, as per
MOTOR CONTROL
Section 8.3 VVW on page 8-25.
Micro Mini Drives | 8-25
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