Automatic Voltage Regulation (Avr); Dynamic Braking Voltage; Dc Braking Lower Bound Limit - Delta VFD-L series User Manual

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Automatic Voltage Regulation (AVR)

Settings
AVR function automatically regulates the AC drive output voltage to the Maximum Output
Voltage (Pr.1-02). For instance, if Pr.1-02 is set at 200 VAC and the input voltage is at
200V to 264VAC, then the Maximum Output Voltage will automatically be regarded to 200
VAC.
Without AVR function, the Maximum Output Voltage may vary between 180V to 264VAC,
due to the input voltage varying between 180V to 264 VAC.
Selecting program value d2 enables the AVR function and also disables the AVR function
during deceleration. This offers a quicker deceleration.
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Dynamic Braking Voltage

Settings
During deceleration, the DC-bus voltage will increase due to motor regeneration. When
DC bus voltage level exceeds the Dynamic Braking Voltage, the DC brake output pins
(B1, B2) will be activated.
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DC Braking Lower Bound Limit

Settings
The setting frequency is lower than Pr.8-17, the DC Braking will not be activated when
stops.
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d 0 AVR function enabled
d 1 AVR function disabled
d 2 AVR function disabled when deceleration
d 350 to d 450V*
d0.0 to d400 Hz
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VFD-L Series
Factory Setting: d 2
Factory Setting: d 380*
Unit: 1Volt*
Factory Setting: d 0.0
Unit: 0.1Hz
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