Delta Electronics AC Motor Drive VFD-VE Series - Manual (Page 96)

Chapter 4 Parameters|
Revision August 2008, 03VE, SW V2.04 4-47
From the table, we see that the PWM carrier frequency has a significant influence on the
electromagnetic noise, AC motor drive heat dissipation, and motor acoustic noise.
00-18 Auto Voltage Regulation (AVR) Function
Control
mode
VF VFPG SVC FOCPG TQRPG
Factory setting: 0
Settings 0 Enable AVR
1 Disable AVR
2 Disable AVR when deceleration stop
It is used to select the AVR mode. AVR is used to regulate the output voltage to the motor. For
example, if V/f curve is set to AC200V/50Hz and the input voltage is from 200 to 264VAC, the
output voltage won’t excess AC200V/50Hz. If the input voltage is from 180 to 200V, the output
voltage to the motor and the input voltage will be in direct proportion.
When setting Pr.00-18 to 1 during ramp to stop and used with auto accel./decel. function, the
acceleration will be smoother and faster.
00-19 Auto Energy-saving Operation
Control
mode
VF VFPG SVC FOCPG
Factory setting: 0
Settings 0 Disable
1 Enable
When the Auto Energy-saving function is enabled, the drive will operate with full voltage during
acceleration and deceleration. At constant speed, the AC drive will calculate the optimal output
voltage value for the load. It is possible for the output voltage to be 25% below Maximum
Output Voltage during auto energy-saving operation. This function should not be used with
variable loads or continuous rated output loads.
When output frequency is constant, i.e. constant operation, the output voltage will be auto
decreased with load reduction. To make the AC motor drive runs under the energy-saving with
the minimum value of the product of voltage and current.