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1.2 General Description
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YASKAWA ELECTRIC
EZZ010926 FSDrive-MV1000 Instructions
◆
Control Mode Selection
The control mode that is appropriate for your application can be selected from among the three available with the drive.
Overviews of the control modes and their features are given below.
Table 1.6 Control Modes and their Features
Note the following points when using the main control functions in
.
• In cases where it is possible to separate the motor and machine during trail operation, perform rotational autotuning.
After this, the control system must be adjusted within the range where the machine doesn’t vibrate. Note that rotational
autotuning can only be performed when an induction motor is run in the vector control mode.
• In vector control and control of PM motors, combine only one motor with one drive. Only in the V/f control mode,
multiple motors can be controlled by a single drive. Note that, as a guide, you should select the drive capacity so that
the motor rated current is 50% to 100% of the drive rated current. When running multiple induction motors in parallel
using a single drive, the capacity of the drive should be larger than 1.1 times the total motor rated current.
• When a speed estimation type speed search is performed, only one motor must be combined with one drive. In
addition, the frequency must be no greater than 120 Hz, and the motor capacity must be the same as that of the drive or
one frame lower.
Motor Type
Induction Motors
–
Control Mode
V/f
OLV
CLV
Remarks
Parameter
Setting
A1-02 = 0
A1-02 = 2
(Factory setting)
A1-02 = 3
–
Basic Control
V/f control
Open Loop Vector
control
Closed Loop Vector
control
–
Main
Applications
General variable speed
control, especially:
• Multi-motor
applications (where
multiple motors are
connected to a single
drive)
• General variable
speed control
• Applications that
require high
performance and
advanced functions
without PG on the
motor side.
Ultra-high-
performance control
with a PG at the motor
side
Examples:
High-accuracy
speed control
Torque control
Torque limit
–
PG Option Card
N/A
N/A
PG-B3 or PG-X3
–
Ma
in
Co
ntrol
F
unc
ti
on
s
Tuning
Line-to-line resistance
(normally not needed)
Rotational, line-to-line
resistance
Rotational, line-to-line
resistance
Automatically adjusts the parameter settings
that relate to the electrical characteristics of
the motor.
Torque
Limit
N/A
YES
YES
Sets the maximum torque for the motor to
protect the load and connected machinery.
Torque
Control
N/A
N/A
YES
Allows direct control of motor torque for
tension control and other such applications.
Droop
Function
N/A
N/A
YES
–