Trip-Less Intensification - Toshiba TOSVERT VF-S11 Instruction Manual

[600V Class]
VFS11-
6007P
6015P
6022P
6037P
6055P
6075P
6110P
6150P
* The currents in the above table are used as the basis to make calculations for inverter overload trip (ol1).
* Default setting of PWM carrier frequency is 12kHz, but rated output current of rating label display at 4kHz.
If
in order to secure the rated current at frequencies of 4 kHz or less.
* If
which the carrier frequency is decreased automatically.
* Random control is exercised when the motor is operated in a low-frequency range where it produces
annoying magnetic noise.
If the carrier frequency (
6
because the level of motor magnetic noise is low at high frequencies.
* When the carrier frequency control mode selection (
should be set preferably below 4 kHz. Otherwise the output voltage may drop.

6.13 Trip-less intensification

6.13.1 Auto-restart (Restart of coasting motor)
• Stand clear of motors and mechanical equipment
If the motor stops due to a momentary power failure, the equipment will start suddenly when power is
restored.
This could result in unexpected injury.
Mandatory
• Attach warnings about sudden restart after a momentary power failure on inverters, motors and
equipment for prevention of accidents in advance.
• Function
4kHz or less
1.7
2.7
3.9
6.1
9
11
17
22
is set to or , however, the carrier frequency will decrease automatically with increase in current
is set to 0 or 2, trip will occur when the current increases and reaches the level above
) is set above 7.1 kHz, the random control function will not be performed,
: Auto-restart control selection
The parameter detects the rotating speed and rotational direction of the motor during
coasting ing the event of momentary power failure, and then after power haas been restored, restarts
the motor smoothly (motor speed search function). This parameter also allows commercial power
operation to be switched to inverter operation without stopping the motor.
During operation, " " is displayed.
Carrier frequency
12kHz or less
1.5
2.4
3.5
5.5
8.1
9.9
15.3
19.8
) is set to or
Caution
F-34
E6581158
16kHz or less
1.4
2.2
3.1
4.9
7.2
8.8
13.6
17.6
, the carrier frequency ( )