YASKAWA CIPR-GA50C series Technical Manual page 26

1.3 Features and Advantages of Control Methods
PM Open Loop Vector
Control Method
Selection
Controlled Motor
*5
Torque Limits No
*5
Speed Search Yes
Automatic Energy-
No
*5
saving Control
High Slip Braking No (induction motor-specific
(HSB) function)
Feed Forward Control
No
*5
KEB Ride-Thru
Yes
*5
Function
Overexcitation No (induction motor-specific
Deceleration function)
Overvoltage
Suppression Function Yes
*5 *6
*1 Enabled when n8-57 = 1 [HFI Overlap Selection = Enabled].
*2 Rotational Auto-Tuning is necessary.
*3 Contact Yaskawa or your nearest sales representative to drive non-Yaskawa PM motors (SSR1 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 Do not use this function with hoist application.
26
PM Advanced Open Loop
Control
(OLV/PM) (AOLV/PM)
PM Motor
Yes
Yes
Yes (IPM motors only)
No (induction motor-specific
function)
Yes
Yes
No (induction motor-specific
function)
Yes
EZ Open Loop Vector Control
Vector
(EZOLV)
Induction Motors/PM Motors/
SynRM (Synchronous
Reluctance Motors)
Yes
Yes (Although NOT operation in
the reverse direction of the Run
command)
Yes
No
No
Yes
No
Yes
Controls maximum motor torque to
prevent damage to machines and loads.
Immediately estimates (or detects) motor
speed and direction when coasting to a
stop to quickly start-up the drive without
stopping the motor.
Automatically adjusts the voltage that the
drive applies to the motor to maximize
motor efficiency for small and large loads.
Increases motor loss to let the motor
decelerate faster than usual without a
braking resistor. Motor characteristics have
an effect on this function.
Compensates effects of the system inertia
to increase the speed precision when the
load changes.
Quickly and safely stops the motor during
power loss and automatically starts
operation at the previous speed when the
drive applies power again without coasting
the motor.
Sets the V/f higher than the setting value
during deceleration to increase motor loss
and decrease deceleration time.
Adjusts speed during regeneration to
prevent overvoltage.
YASKAWA SIEPC71061753A GA500 Technical Manual
Notes
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