Dynamic (Regenerative) Braking - For Abrupt Motor Stop - Toshiba TOSVERT VF-PS1 Instruction Manual

An example of setting when
Input voltage
Motor speed
• Even after the recovery from an input power failure, the motor continues slowing down to a stop. If the voltage in the
inverter main circuit falls below a certain level, however, control will be stopped and the motor will coast.
• The deceleration time varies according to the setting of
time elapsed before a motor running at
• A motor coasts when the voltage in the inverter is becoming
The display alternately lights "
supply is recovered.
5.19

Dynamic (regenerative) braking - For abrupt motor stop

5
• 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
* Default settings vary from model dependent. ⇒ Refer to page E-38, 39.
Protection levels defined by
Note 1: The time set using
before the inverter trips if a load 10 times as large as the allowable continuous braking resistance specified
using
DGP resistance setting).
Note 2: If the parameter
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-250kW or more, set
not included as standard equipment.
=
Deceleration stop
: Dynamic braking selection
: Dynamic braking resistance
: Allowable continuous braking resistance
: Braking resistance overload time
Function
Dynamic braking selection
Dynamic braking resistance
Allowable continuous braking
resistance
Braking resistance overload time
(Refer to Section 6.15.2).
is the time for which the resistor sustains an overload. (Enter the time elapsed
is applied.) There is no need to change resistance settings recommended by Toshiba (except
is set to or
Time
. In this case, the deceleration time refers to the
(maximum frequency) comes to a full stop.
or less.
" and continues the coasting state of the motor even though power
Adjustment range
:Disabled
:Enabled (braking resistance overload
detect)
:Select (braking resistance overload
not detect)
~ Ω
~ kW
~ sec.
(regenerative braking selected), the inverter will be set automatically so
= )
to , because separate dynamic braking units are
E-34
E6581531
Default setting
According to model
⇒ Refer to page K-41.
According to model
⇒ Refer to page K-41.