Dynamic (Regenerative) Braking - For Abrupt Motor Stop - Toshiba TOSVERT VF-AS1 Instruction Manual

5.19

Dynamic (regenerative) braking - For abrupt motor stop



 : Allowable continuous braking resistance
 : Braking resistance overload time
• Function
Dynamic braking is used in the following cases:
1) Need to stop the motor quickly.
2) The inverter trips because of an overvoltage (OP) during deceleration.
3) Fluctuation of load condition causes a regenerative power even at a constant speed such as press machine.
[Parameter setting]
Title

5



* Protection levels defined by  (Refer to Section 6.14.2).
Note 1: The time set using  is the time for which the resistor sustains an overload. (Enter the time elapsed
before the inverter trips if a load 10 times as large as the allowable continuous braking resistance specified
using  is applied.) There is no need to change resistance settings recommended by Toshiba (except
DGP resistance setting).
Note 2: If the parameter  is set to  or  (regenerative braking selected), the inverter will be set automatically so
as to deal with the regenerative energy from the motor by means of a resistor, without taking any action to limit
overcurrent. (The same function as =)
Note 3: For inverters with ratings of 400V-200kW or more, set  to , because separate dynamic braking units are
not included as standard equipment.
: Dynamic braking selection
: Dynamic braking resistance
Function
Dynamic braking selection
Dynamic braking resistance
Allowable continuous braking
resistance
Braking resistance overload
time
Adjustment range
:Disabled
:Enabled (bracking resistance overload
detect)
:Enabled (bracking resistance overload
not detect)
~ Ω
~ kW
~ sec.
E-36
E6581445
Default setting

According to model
⇒ Refer to page K-46.
According to model
⇒ Refer to page K-46.
