YASKAWA GA800 Series, Техническое описание

Страница: 29 / 1016

Receiving
1
1.3 Features and Advantages of Control Methods
YASKAWA SIEPC71061737B GA800 Drive Technical Reference 29
Control method
selection
PM Open Loop Vector
Control
(OLV/PM)
PM Advanced Open
Loop Vector
(AOLV/PM)
PM Closed Loop Vector
Control
(CLV/PM)
EZ Open Loop Vector
Control
(EZOLV)
Notes
Controlled
Motor
PM Motor
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
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 [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 and SST4 series standard specifications).
*4 Select the drive capacity and motor 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 .
Note:
When you set n8-35 = 1 [Initial Pole Detection Method = High Frequency Injection] and n8-57 = 1 , do High Frequency Injection Auto-
Tuning.