Delta Electronics VFD-S Manual De Usuario

Chapter 5 Parameters|VFD-S Series 

5-52

 

Revision August 2008, SE09, SW V2.61

Over-Voltage Stall Prevention 

 

 

 

 

Factory Setting: d1

 Settings 

d0 

Disable 

  

d1 

Enable 

 

During deceleration, the motor DC bus voltage may exceed its Maximum Allowable Value due 

to motor regeneration. When this function is enabled, the AC drive will stop decelerating. 

Maintaining a constant output frequency when it happens. The AC drive will only resume 

deceleration when the voltage drops below preset value. 

  

With a moderate inertial load, the over-voltage during deceleration won’t happen, and the drive will 

stop in programmed time. The AC drive will automatically extend the deceleration time with high 

inertial loads.  If deceleration time is critical for the application, then dynamic brake resistors should 

be used. 

 

Over-Voltage Stall Prevention Level 

Unit: 1

 

Settings  230V Series  d350 to d410V 

Factory Setting: 390

 

 

460V Series d700 to d820V 

Factory Setting: 780 

 

During deceleration, the DC bus voltage may exceed its maximum allowable value due to 

motor regeneration. When this function is enabled, the AC drive will stop decelerating. 

Maintaining a constant output frequency when it happens. The AC drive will resume 

deceleration when the voltage drops below preset value. 

 

With a moderate inertial load, the over-voltage during deceleration won’t happen, and the 

drive will stop in programmed time. The AC drive will automatically extend the deceleration 

time with high inertial loads. If deceleration time is critical for the application, then dynamic 

brake resistors should be used.