Vacon CX, Руководство пользователя

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Multi-purpose Control Application II Multi-purpose Control Application II Multi-purpose Control Application II Multi-purpose Control Application II Multi-purpose Control Application II
Vacon Plc
Phone: +358-(0)201 2121 Fax: +358-(0)201 212 205
Service: +358-40-8371 150 E-mail: vacon@vacon.com
T T
T T Torque control
orque control
orque control orque control orque control
Torque control can be activated either by setting parameter 6.1 to torque control or with
digital input DIA3 (parameter 2.2=10). Torque reference source is selected with parameter
9.1 and reference scaling with parameters 9.2 and 9.3.
9.1 9.1
9.1 9.1
9.1 T T
T T
Torque reference selection orque reference selection
orque reference selection orque reference selection
orque reference selection
Defines the source for torque reference value:
0 = None
1 = U
in
2 = I
in
3 = Panel torque reference r2
4 = Ain1 (option board)
5 = Ain2 (option board)
6 = Fieldbus control
9.2 9.2
9.2 9.2
9.2 T T
T T
Torque reference scaling bias orque reference scaling bias
orque reference scaling bias orque reference scaling bias
orque reference scaling bias
9.3 9.3
9.3 9.3 9.3
T T
T T Torque reference scaling gain
orque reference scaling gain
orque reference scaling gain orque reference scaling gain orque reference scaling gain
The additional scaling function can be used for scaling the torque reference. The
torque reference is always fed to the torque controller even if it is not activated.
T
ref. out
= gain
×
T
ref. in
+ bias
9.4 9.4
9.4 9.4 9.4
TC time constant TC time constant
TC time constant TC time constant TC time constant
Defines the time constant for the torque controller. A short time constant means
fast response.
9.5 9.5
9.5 9.5 9.5
TC min. control limit TC min. control limit
TC min. control limit TC min. control limit TC min. control limit
Defines frequency limit below which the frequency converter operates normally
in frequency control mode.
The internal torque calculation is inaccurate at low speeds (< nominal slip of the
motor). It is recommended to operate in frequency control operation mode at low
speeds.
The reference value in frequency controlled operation mode is selected with para-
meter 1. 5.