Toshiba TOSVERT VF-PS1 User Manual

E6581386
E-34
5
 An example of setting when =
Motor speed
Time
In
p
ut volta
g
e
Deceleration stop
• 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 . In this case, the deceleration time refers to the
time elapsed before a motor running at  (maximum frequency) comes to a full stop.
• If the voltage in main circuit below  (Under voltage detection level ) at Non-stop control during power failure,
the motor will coast and inverter display is shown "(displayed alternately)". And then, If recovery from
the input power failure, the motor continues coasting.
5.19 Dynamic (regenerative) braking - For abrupt motor stop
  : Dynamic braking selection
 : Dynamic braking resistance
 : Dynamic braking resistor capacity
 : Braking resistance overload time
[Parameter setting]
Title Function Adjustment range Default setting
Setting Braking function ST-off
overload
detect
 Disabled － ―
 protect

Enabled
not protect
 protect

Enabled *1)
(It is effective
in trip.
condition.)
Disabled
not protect
 protect

Enabled
not protect
 protect
 Dynamic braking selection

Enabled
(It isn't
effective in
trip.condition )
Disabled
not protect

 Dynamic braking resistance ~ Ω
According to model
 Refer to page K-42.

Dynamic braking resistor
capacity
~ kW
According to model
 Refer to page K-42.

Braking resistance overload
time
~ sec. 
*1) The state of olr trip is excluded.
* Default settings vary from model dependent.  Refer to page E-38, 39.
Protection levels defined by  (Refer to Section 6.15.2).
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 dynamic braking resistor capacity 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  -  (Braking function enabled), 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-250kW and above, set  to , because separate dynamic braking units
are not included as standard equipment. 
• 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.

Toshiba TOSVERT VF-PS1 Specifications

General

Brand	Toshiba
Model	TOSVERT VF-PS1
Category	Power Supply
Language	English