Controls - Danfoss VLT AutomationDrive FC 300 Design Manual

Product Introduction
NOTICE
The F-frames are available with or without an options cabinet. The F1 and F2 consist of a rectifier cabinet on the left
and an inverter cabinet on the right. The F3/F4 are F1/F2 units with an additional options cabinet located left of the
rectifier cabinet.
Frame size F8
Enclosure IP 21/54
protection
NEMA Type 1/Type 12
High overload rated 250-400 kW
power -160% (380-500 V)
overload torque 355-560 kW
(525-690 V)
Table 3.2 Product Overview, 12-Pulse Frequency Converters
NOTICE
The F-frames are available with or without an options cabinet. The F8, F10 and F12 consist of a rectifier cabinet on the
left and an inverter cabinet on the right. The F9/F11/F13 are F8/F10/F12 units with an additional options cabinet
located left of the rectifier cabinet.

3.2 Controls

The frequency converter is capable of controlling either the speed or the torque on the motor shaft. Setting 1-00 Configu-
ration Mode determines the type of control.
Speed Control
There are 2 types of speed control:
•
Open loop does not require any feedback from motor (sensorless).
•
Closed loop PID requires a speed feedback to an input. A properly optimised speed closed loop control has higher
accuracy than a speed open loop control. The speed control selects which input to use as speed PID feedback in
7-00 Speed PID Feedback Source.
Torque Control
The torque control function is used in applications where the torque on the motor output shaft is controlling the
application as tension control. Torque control is selected in 1-00 Configuration Mode, either in [4] VVC+ open loop or [2] Flux
control closed loop with motor speed feedback. Torque setting is done by setting an analog, digital, or bus controlled
reference. The max speed limit factor is set in 4-21 Speed Limit Factor Source. When running torque control, it is
recommended to make a full AMA procedure since the correct motor data is essential for optimal performance.
•
Closed loop in flux mode with encoder feedback offers superior performance in all four quadrants and at all motor
speeds.
•
plus
Open loop in VVC
Open loop torque function works only in one speed direction. The torque is calculated on the basis of current
measurement within the frequency converter. See 8 Application Examples.
®
VLT AutomationDrive FC 300 Design Guide 90-1200 kW
F9
F9 F8
21/54
Type 1/Type 12 Type 1/Type 12
250-400 kW 450-630 kW
(380-500 V) (380-500 V)
355-560 kW 630-800 kW
(525-690 V) (525-690 V)
mode. The function is used in mechanically robust applications, but its accuracy is limited.
MG34S202 - Rev. 2013-08-19
F10 F11
F11
F10
21/54 21/54
Type 1/Type 12
450-630 kW
(380-500 V)
630-800 kW
(525-690 V)
F12 F13
F13
F12
21/54 21/54
Type 1/Type 12 Type 1/Type 12
710-800 kW 710-800 kW
(380-500 V) (380-500V)
900-1200 kW 900-1200 kW
(525-690 V) (525-690 V)
3 3
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