Mentor MP User Guide
67
Issue: 3 www.controltechniques.com
The rated current should be set at the motor nameplate value for rated
current. The value of this parameter is used in the following:
•
Current limits
•
Motor thermal protection
The rated speed defines the base speed of the motor. It is also to
determine the speed used in the auto tuning inertia test (see
SE13
[Pr
0.34
,
5.12
]).
* Modes 1 and 2 are not user saved, Modes 0, 3 and 4 are user saved.
If
SE09
(Pr
0.30
,
11.42
) is equal to 1 or 2 this value is not transferred to
the EEPROM or the drive. If
SE09
(Pr
0.30
,
11.42
) is set to a 3 or 4 the
value is transferred.
For further information, refer to Chapter 9
This parameter will be set to the field current of the motor and will define
the rated field current for the field controller.
The maximum voltage the field controller is allowed to generate.
When this parameter is set to 0 the internal and external field controllers
are disabled. Setting the parameter to 1 enables the internal or external
field controller.
If this parameter is set to a non-zero value, the drive is enabled and a
run command is applied in either direction the drive performs an auto-
tune test. All tests that rotate the motor are carried out in the forward
direction if
di12
(Pr
0.47
,
1.12
) = 0 or the reverse direction if
di12
(Pr
0.47
,
1.12
)
= 1. For example, if the test is initiated by applying run
reverse (Pr
6.32
= 1) the test is performed in the reverse direction. The
test will not start unless the drive is disabled before the test is initiated by
applying the enable or run, i.e. it will not start if the drive is in the stop
state. It is not possible to go into the stop state if
di12
(Pr
0.47
,
1.12
) has
a non-zero value.
When the test is completed successfully the drive is disabled and will
enter the inhibit state. The motor can only be restarted if the enable is
removed either from the enable input, or Pr
6.15
is set to zero or from
the control word (Pr
6.42
) if it is active.
Static autotune for current loop gains
When this operation is performed, the drive will estimate the following,
with respect to the selected motor map, and store the values:
Motor constant
(Pr
5.15
)
Continuous proportional gain
(Pr
4.13
)
Continuous integral gain
(Pr
4.14
)
Discontinuous integral gain
(Pr
4.34
)
Back EMF set point
(Pr
5.59
)
Armature resistance
(Pr
5.61
)
Flux loop I gain
(Pr
5.72
)
Spinning autotune for motor saturation break points
When this operation is performed, the drive will estimate the following,
with respect to the selected motor map, and store the values:
Motor saturation break points
(Pr
5.29
, Pr
5.30
), by spinning the
motor at 25% of it’s
base speed
(Pr
5.06
)
Field current compensation factor
(Pr
5.74
)
Spinning autotune for inertia measurement
The drive can measure the total inertia of the load and motor. This is
used to set the speed loop gains. See Pr
3.17
Speed controller setup
method
= 1 (bandwidth setup). During the inertia measurement test the
drive attempts to accelerate the motor to
3
/
4
rated speed then back to a
standstill. Several attempts may be made, starting with rated torque/16,
and then increasing the torque progressively to x
1
/
8
, x
1
/
4
, x
1
/
2
, and x 1
rated torque if the motor cannot be accelerated to the required speed. If
the required speed is not achieved on the final attempt the test is
aborted and a tuNE 1 trip is initiated. If the test is successful the
acceleration and deceleration times are used to calculate the motor and
load inertia and a value is written to Pr
3.18
Motor and load inertia
.
SE07
{0.28, 5.07}
Motor rated current
RW
Uni
RA
US
Ú
0 to RATED_CURRENT_MAX
A
Ö
RATED_CURRENT_MAX
SE08
{0.29, 5.08}
Base speed
RW
Uni
US
Ú
0.0 to 10,000.0 rpm
Ö
1000.0
SE09
{0.30, 11.42}
Parameter copying
RW
Txt
NC
*
Ú
nonE (0), rEAd (1), ProG (2),
Auto (3), boot (4)
Ö
nonE (0)
Pr
String
Pr
value
Comment
nonE
0
Inactive
rEAd
1
Read parameter set from the SMARTCARD
ProG
2
Programming a parameter set to the SMARTCARD
Auto
3
Auto save
boot
4
Boot mode
SE10
{0.31, 5.70}
Rated field current
RW
Uni
PT
US
Ú
0 to
FIELD_CURRENT_SET_MAX
Ö
Size 1: Eur 2A, USA 8A
Size 2A/B: Eur 3A, USA 20A
Size 2C/D: Eur 5A, USA 20A
SE11
{0.32, 5.73}
Rated field voltage
RW
Uni
PT
US
Ú
0 to 500 Vdc
Ö
Eur: 360, USA: 300
SE12
{0.33, 5.77}
Enable field control
RW
Txt
US
Ú
OFF (0) or On (1)
Ö
OFF (0)
SE13
{0.34, 5.12}
Autotune
RW
Uni
NC
Ú
0 to 3
Ö
0
Value
Autotune function
0
None
1
Static autotune for current loop gains
2
Spinning autotune for motor saturation break points
3
Spinning autotune for inertia measurement
Содержание MP105A4
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