124
E300 Installation and Commissioning Guide
Issue Number: 1
•
A rotating test is performed in which the motor is accelerated with the currently selected ramps up to the currently selected speed reference, and
this speed is maintained for the duration of the test. The resultant motor and load inertia is stored in
Inertia Compensation Total Inertia
(
E15
). To
perform the autotune enter 3 (Inertia) into the parameter, followed by a Drive enable and run signal.
Following the completion of an autotune test, the drive will go into the inhibit state. The drive must be disabled before the drive can be re-enabled and
made to run. The drive can be disabled by removing the Drive enable signal from control terminal 31, setting the Drive enable = Off (0).
Autotune RFC-S mode
There are three autotune tests available in RFC-S mode a static test, a rotating test and a test to measure motor and load
inertia. A static autotune will give good performance and a rotating autotune will give improved performance as it measures the actual values of the
motor parameters required by the drive.
•
The static autotune can be used when the motor is loaded and it is not possible to uncouple the load from the motor shaft. This test can be used
to measure all the necessary parameters for basic control. During the static autotune, a test is performed to locate the flux axis of the motor.
However this test may not be able to calculate such an accurate value for the
A16
(
Position Feedback Phase Angle
C13
) as compared to the
rotating autotune. The static test measures
Stator Resistance
(
B34
),
Transient Inductance
(
B33
),
Maximum Deadtime Compensation
(
B46
),
Current at Maximum Dead time Compensation
(
B47
) and
No Load Lq
(
B37
). The stator resistance and the transient inductance are then used to
set-up the current loop gains. If sensorless mode is not selected then the position feedback phase angle is set-up for the position feedback
device. To perform a static autotune enter 1 (Static) into the parameter followed by a Drive enable and run signal.
•
A rotating autotune should only be used if the motor is unloaded and the lift de-roped. This test can be used to measure all the necessary
parameters for the basic control. During the rotating autotune
A18
(
Motor Rated Current
B02
) is applied and the motor is rotated by 2 electrical
revolutions (i.e. up to 2 mechanical revolutions) in the required direction. If sensorless mode is not selected then the
A16
(
Position Feedback
Phase Angle
C13
) is set-up for the position feedback device. A static test is performed to measure
Stator Resistance
(
B34
),
Transient Inductance
(
B33
),
Maximum Deadtime Compensation
(
B46
),
Current at Maximum Dead time Compensation
(
B47
)
and
No Load
Lq
(
B37
). The stator
resistance and transient inductance are used to set-up the current loop gains. This is only done once during the test so the user can make further
adjustments to the current controller gains if required. To perform the autotune enter 2 (Rotating) into the parameter followed by a Drive enable
and run signal.
•
The inertia autotune measures the mechanical characteristic of the motor and load by rotating the motor at the speed defined by the present
speed reference and injecting a series of speed test signals. This test should only be used provided all the basic control parameters have been
set-up correctly and the speed controller parameters should be set to conservative levels, such as the default values, so that the motor is stable
when it runs. The test measures the motor and load inertia, which can be used in producing a torque feed-forward term. If
Mechanical Load Test
Level
(
B49
) is left at its default value of zero then the peak level of the injection signal will be 1% of the maximum speed reference subject to a
maximum of 500 rpm. If a different test level is required then
Mechanical Load Test Level
(
B49
) should be set to a non-zero value to define the
level as a percentage of the maximum speed reference, again subject to a maximum of 500 rpm. The user defined speed reference which defines
the speed of the motor should be set to a level higher than the test level, but not high enough for flux weakening to become active. In some cases
however, it is possible to perform the test at zero speed provided the motor is free to move, but it may be necessary to increase the test signal
from the default value. The test will give the correct results when there is a static load applied to the motor and in the presence of mechanical
damping. This test should be not be used, however for sensorless mode, or if the speed controller cannot be set-up for stable operation. A
rotating test is performed in which the motor is accelerated with the currently selected ramps up to the currently selected speed reference, and
this speed is maintained for the duration of the test. The resultant motor and load inertia is stored in
Inertia Compensation Total Inertia
(
E15
). To
perform the autotune enter 3 (Inertia) into the parameter, followed by a Drive enable and run signal.
Following the completion of an autotune test the drive will go into the inhibit state. The drive must be disabled before it can be re-enabled and made
to run. The drive can be disabled by removing the Drive enable signal from control terminal 31, setting the Drive enable = Off (0).
A27
(
Reverse Motor Phase Sequence
B26
)
If reverse motor phase sequence = Off (0) the output motor phase sequence is U V W, when the output frequency is positive and W V U when the
output frequency is negative. If Reverse motor phase sequence = On (1) the output motor phase sequence is reversed so that the phase sequence is
W V U for positive output frequencies and U V W for negative output frequencies.
Value
Autotune
0
No autotune being requested
1
Static autotune
2
Rotating autotune
3
Inertia autotune
When a rotating auto tune is being carried out it is the responsibility of the authorized person to ensure they have read the auto tune
instructions and are fully aware of its operation. Also ensure that it is safe to remove (lift) the motors brake with no risk of loss of control.
Ensure during this process there is no load on the motor (or the system is balanced to avoid uncontrolled operation) and there is sufficient
distance for the car to move within the lift shaft when the rotating auto tune is being carried out to avoid the risk of damage to the system.
WARNING
A27 {B26}
Reverse Motor Phase Sequence
RW
Bit
US
OL
Ú
Off (0) On (1)
Ö
Off (0)
RFC-A
RFC-S
Summary of Contents for E300 Series
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