Control Techniques Unidrive 1 Series, Руководство пользователя

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Safety
Information
Product
Information
Mechanical
Installation
Electrical
Installation
Getting
Started
Menu 0
Running
the motor
Optimisation Macros
Advanced
Parameters
Technical
Data
Diagnostics
UL Listing
Information
Unidrive User Guide
73
Issue Number: 9 www.controltechniques.com
Use Pr 0.05 to select the required frequency/speed reference, as
follows:
*This parameter has a default setting of 120% in Unidrive VTC.
For the definition of I
MAX
%, seesection 8.2 Current limits on page 98.
Pr 0.06 limits the maximum output current of the drive (and hence
maximum motor torque) to protect the drive and motor from overload.
Set Pr
0.06 at the required maximum torque as a percentage of the rated
torque of the motor, as follows:
(%)
Where:
T
R
Required maximum torque
T
RATED
Motor rated torque
Alternatively, set 0.06 at the required maximum active (torque-
producing) current as a percentage of the rated active current of the
motor, as follows:
(%)
Where:
I
R
Required maximum active current
I
RATED
Motor rated active current
6.2.4 Voltage boost (open-loop),
Speed-loop PID gains (closed-loop)
*This parameter has a default setting of Fd (3) in Unidrive VTC.
Open-loop
Use Pr 0.07 (Pr 5.14 ) to select fixed voltage boost, or Vector control of
voltage boost. Fixed boost requires a value to be set in Pr 0.08 Boost
voltage by the user. See Figure 6-3. Fixed boost should be used when
Pr 0.39 Synchronize to a spinning motor is set at 1.
Figure 6-3 Effect of fixed voltage boost on the voltage-to-
frequency characteristic
Vector control causes the voltage boost to be automatically regulated
according to the load on the motor.
Vector control requires the value of stator winding resistance to be
stored in a parameter in the drive. The three Vector modes allow the
resistance to be measured under different circumstances.
Closed-loop
Pr 0.07 (Pr 3.10 ) operates in the feed-forward path of the speed-control
loop in the drive. See Chapter 8 Optimisation .
*This parameter has a maximum range of 15% in Unidrive VTC.
Open-loop
When Pr 0.07 Voltage mode selector is set at Fd , set Pr 0.08 (Pr 5.15 ) at
the required value for the motor to run reliably at low speeds.
Setting Control mode Function
0 Terminal
Analog frequency / speed reference selected
by ANALOG INPUT 1 / INPUT 2 contact
1 Terminal Analog frequency / speed reference 1 selected
2 Terminal Analog frequency / speed reference 2 selected
3 Terminal
Preset frequency / speed references selected
(not used with Menu 0)
4 Keypad Frequency / speed controlled by the keypad
5 Terminal
Precision reference selected
(not used with Menu 0)
0.06 {4.07} Current Limit
RW Uni
OL
Ú
0 to I
MAX
%
Ö
150*
VT
Ú Ö
150
SV
Ú Ö
175
Pr 0.06
T
R
T
RATED
-------------------- 100
×
=
Pr 0.06
I
R
I
RATED
------------------
100
×
=
0.07 {5.14}
0.07 {3.10} OL> Voltage mode selector
CL> Speed controller proportional gain
RW Uni OL> P
OL
Ú
Ur_S (0), Ur_l (1), Ur (2),,
Fd (3)
Ö
Ur_l (1)*
CL
Ú
0 to 32,000 %
Ö
200
Setting Function
Vector modes
Ur_S 0
Motor stator resistance is measured each time the drive is
started.
Ur_I 1
Motor stator resistance is measured at power-up if the
EXTERNAL TRIP contact is closed and no other trip
condition exists.
Ur 2
Motor stator resistance is not measured (use this mode only
after having used
Ur_S or Ur_I to measure the stator
resistance).
Fixed boost mode
Fd 3
Fixed voltage boost that can be manually adjusted by
parameter
0.08 Boost voltage .
0.08 {5.15}
0.08 {3.11} OL> Voltage boost
CL> Speed controller integral gain
RW Uni
OL
Ú
0 to 25.0 % of motor rated
voltage*
Ö
3.0
CL
Ú
0 to 32,000
Ö
100
Motor voltage
[0.08]
Voltage boost
F requency