Receiving
1
1.2 Features and Advantages of Control Methods
SIEPYEUOQ2A01G AC Drive Q2A Technical Manual 27
Control Method
Selection
PM Open Loop Vector
Control
(OLV/PM)
PM Advanced Open
Loop Vector Control
(AOLV/PM)
PM Closed Loop Vector
Control
(CLV/PM)
EZ Open Loop Vector
Control
(EZOLV)
Notes
Controlled
Motor
PM Motor
Induction Motors/PM
Motors/SynRM
(Synchronous
Reluctance Motors)
-
High Slip Braking
(HSB)
No (induction motor-
specific function)
No (induction motor-
specific function)
No (induction motor-
specific function)
No
Increases motor loss to let the
motor decelerate faster than usual
without a braking resistor. Motor
characteristics have an effect on
this function.
Feed Forward
Control
*5
No Yes Yes No
Compensates effects of the system
inertia to increase the speed
precision when the load changes.
KEB Ride-Thru
Function
*5
Yes Yes Yes Yes
Quickly and safely stops the motor
during power loss and
automatically starts operation at the
previous speed when restores
power without coasting the motor.
Overexcitation
Deceleration
No (induction motor-
specific function)
No (induction motor-
specific function)
No (induction motor-
specific function)
No
Sets the V/f higher than the setting
value during deceleration to
increase motor loss and decrease
deceleration time.
Overvoltage
Suppression
Function
*5 *7
Yes Yes Yes Yes
Adjusts speed during regeneration
to prevent overvoltage.
Sensorless Zero
Speed Control
*5
No Yes (IPM motors only) - No
Enabled with high frequency
injection with IPM motors.
*1 Enabled when n8-57 = 1 [High-Freq Injection = Enabled].
*2 Rotational Auto-Tuning is necessary.
*3 Contact the manufacturer or your nearest sales representative to drive non-Yaskawa PM motors (SSR1 and SST4 series standard
specifications).
*4 Select the drive capacity accordingly.
*5 Note these points when you use this function:
• 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.
• For vector control, use a 1:1 drive to motor ratio. You cannot use vector control when more than one motor is connected to one
drive. Select a drive capacity so that the motor rated current is 50% to 100% of the drive rated current. If the carrier frequency is
too high, the drive rated current is derated.
*6 Torque control at zero speed is only available with IPM motors. To enable torque control with IPM motors at zero speed, set n8-57 =
1.
*7 Do not use this function with hoist application.
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