Software Braking Level; Compensation Coefficient For Motor Instability - Delta VFD-E User Manual

Chapter 4 Parameters|
AVR function automatically regulates the AC motor drive output voltage to the Maximum
Output Voltage (Pr.01.02). For instance, if Pr.01.02 is set at 200 VAC and the input voltage is
at 200V to 264VAC, then the Maximum Output Voltage will automatically be reduced to a
maximum of 200VAC.
When the motor ramps to stop, the deceleration time is longer. When setting this parameter to
2 with auto acceleration/deceleration, the deceleration will be quicker.

Software Braking Level

08.19
(the Action Level of the Brake resistor)
Settings
This parameter sets the DC-bus voltage at which the brake chopper is activated.
This parameter will be invalid for Frame A models (VFD002E11A/21A/23A,
VFD004E11A/21A/23A/43A, VFD007E21A/23A/43A and VFD022E23A/43A) without brake
chopper for which BUE brake unit must be used.

Compensation Coefficient for Motor Instability

08.20
Settings
The drift current will occur in a specific zone of the motor and it will make motor instable. By
using this parameter, it will improve this situation greatly.
The drift current zone of the high-power motors is usually in the low frequency area.
It is recommended to set to more than 2.0.
4-102
115/230V series: 370.0 to 430.0V
460V series: 740.0 to 860.0V
0.0~5.0
Revision November 2007, 03EE, SW--PW V1.10/CTL V2.10
Unit: 0.1
Factory Setting: 380.0
Factory Setting: 760.0
Unit: 0.1
Factory Setting: 0.0