Auto-Tuning; Auto-Tuning; Types Of Auto-Tuning; Before Auto-Tuning The Drive - YASKAWA T1000V Technical Manual

4.6 Auto-Tuning

4.6

Auto-Tuning

◆ Types of Auto-Tuning

There are three types of Auto-Tuning. Select the best type of Auto-Tuning for the application.
Procedure on page 89.
Type Setting
Rotational Auto-
Tuning for OLV T1-01 = 0
Control
Stationary Auto-
Tuning for Line-
to-Line Resistance T1-01 = 2
(V/f and OLV
Control)
Rotational
Auto-Tuning for T1-01 = 3
V/f Control
Note: Auto-Tuning cannot be performed on permanent magnet motors (IPM, SPM, etc.).

◆ Before Auto-Tuning the Drive

Check the items below before Auto-Tuning the drive.
Basic Auto-Tuning Preparations
■
• Auto-Tuning automatically determines the electrical characteristics of the motor. This is fundamentally different from
other types of Auto-Tuning features used in servo systems.
• Auto-Tuning requires the user to input data from the motor nameplate. Make sure the information written on the
nameplate is available before Auto-Tuning the drive.
• For best performance, be sure the drive input supply voltage equals or exceeds the motor rated voltage.
Note: Performance can be enhanced by using a motor with a base voltage that is 20 V (40 V for 400 V class models) lower than the
input supply voltage. This may be of special importance when operating the motor above 90% of base speed, where high torque
precision is required.
• Auto-Tuning is not possible with permanent magnet motors.
• To cancel Auto-Tuning, press the STOP key on the LED operator.
• Table 4.5 describes digital input and output terminal status during Auto-Tuning.
Auto-Tuning Type
Rotational Auto-Tuning for OLV Control
Stationary Auto-Tuning for Line-to-Line Resistance
Rotational Auto-Tuning for V/f Control
WARNING! Sudden Movement Hazard. Do not release the mechanical brake during stationary Auto-Tuning. Inadvertent brake
release may cause damage to equipment or injury to personnel. Ensure that the mechanical brake release circuit is not controlled by
the drive multi-function digital outputs.
Note: It is recommended that Rotational Auto-Tuning is performed with the load disconnected. Failure to comply could result in
improper drive operation. If Rotational Auto-Tuning is performed for a motor coupled to a load, the motor constants will be
inaccurate and the motor may exhibit abnormal operation. Disconnect or decouple the motor from the load.
88
Application Conditions and Benefits
• Assumes the motor can rotate during the Auto-Tuning process
• Achieves high-performance motor control and should be performed whenever
Open Loop Vector Control is used
For use when:
• The motor cable exceeds 50 m
• The motor cable length has been modified after Auto-Tuning has been previously
performed
• When motor capacity and drive capacity differ
• Assumes the motor can rotate during the Auto-Tuning process
• Improves torque compensation, slip compensation, energy savings, and Speed
Search performance
• Should be performed when Speed Estimation Type Speed Search or Energy Saving
is used in V/f Control
Table 4.5 Digital Input and Output Operation During Auto-Tuning
Digital Input
Not available Functions the same as during normal operation
Not available Maintains the status at the start of Auto-Tuning
Not available Functions the same as during normal operation
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
Refer to Auto-Tuning
Control Mode
Open Loop Vector
Control
V/f Control, Open Loop
Vector Control
V/f Control
Digital Output