Receiving
1
1.2 Features and Advantages of Control Methods
YASKAWA SIEPYEULA5001C LA500 Technical Manual 23
1.2 Features and Advantages of Control Methods
This drive has 2 available control methods from which you can select for different applications.
◆ V/f Control Method
Table 1.4 Features and Advantages of V/f Control
Control Method Selection
Open Loop V/f Control
(V/f)
Notes
Controlled Motor Induction Motor -
Parameter Settings A1-02 = 0 -
Basic Control V/f -
Maximum Output Frequency 120 Hz -
Speed Control Range 1:40
This is the range of variable control.
When you connect and operate motors in this mode, think about the
increase in motor temperature.
Starting Torque 150% / 3 Hz
This is the motor torque that the drive can supply at low speed during
start-up and the related output frequency (rotation speed).
You must think about drive capacity when a large quantity of torque is
necessary at low speed.
Auto-Tuning
*1
Rotational and Line-to-Line Resistance (usually not
necessary)
Automatically tunes electrical motor parameters.
Torque Limits No
Controls maximum motor torque to prevent damage to machines and
loads.
Automatic Energy-saving Control
*1
Yes
Automatically adjusts the voltage that the drive applies to the motor to
maximize motor efficiency for small and large loads.
*1 When you can decouple the motor and machine for a test run, use Rotational Auto-Tuning. You must make adjustments to the control
in the range where there is no vibration in the machine after Rotational Auto-Tuning.
•
◆ Open Loop Vector Control Method
Table 1.5 Features and Advantages of OLV Control
Control Method Selection
Open Loop Vector
(OLV)
Notes
Controlled Motor Induction Motor -
Parameter Settings
A1-02 = 2
(Default)
-
Basic Control Open Loop Current Vector Control -
Maximum Output Frequency 120 Hz -
Speed Control Range 1:100
This is the range of variable control.
When you connect and operate motors in this mode, think about the
increase in motor temperature.
Starting Torque 150% / 1 Hz
*1
This is the motor torque that the drive can supply at low speed during
start-up and the related output frequency (rotation speed).
You must think about drive capacity when a large quantity of torque is
necessary at low speed.
Auto-Tuning
*2
Rotational, Stationary, and Line-to-Line Resistance Automatically tunes electrical motor parameters.
Torque Limits
*2
Yes
Controls maximum motor torque to prevent damage to machines and
loads.
Automatic Energy-saving Control
*2
Yes
Automatically adjusts the voltage that the drive applies to the motor to
maximize motor efficiency for small and large loads.
*1 Select the drive capacity accordingly.
*2 When you can decouple the motor and machine for a test run, use Rotational Auto-Tuning. You must make adjustments to the control
in the range where there is no vibration in the machine after Rotational Auto-Tuning.
•
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