YASKAWA L1000A - Control Mode Selection

1.2 General Description
28 YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
◆ Control Mode Selection
Table 1.2 gives an overview of the L1000A motor control method (control modes) and their various features.
Table 1.2 Control Modes and their Features
Motor Type
<1> For drives with B or earlier as the design revision order, 50 Hz is required. The design revision order and software version are printed on the
nameplate affixed to the side of the drive. Refer to Model Number on page 30 for details.
Induction Motors
Permanent
Magnet Motors
Comments
Control Mode V/ f OLV CLV CLV /P M –
Parameter Setting A1-02 = 0 A1-02 = 2 A1-02 = 3 A1-02 = 7 Default Setting is Open Loop Vector Control.
Basic Description
V/f control
Open Loop Vector
control
Closed Loop
Vec to r co nt rol
Closed Loop
Vector control for
PM motors
–
Type of Applications Motor Type IM IM IM PM –
PG Option Card N/A N/A YES YES –
Control
Characteristics
Speed Control Range
1:40 1:200 1:1500 1:1500 May fluctuate with characteristics and motor temperature.
Speed Accuracy
±2 to 3% ±0.2% ±0.02% ±0.02%
Speed deviation when operating at constant speed. May
fluctuate with characteristics and motor temperature.
Speed Response
3 Hz
(approx.)
10 Hz 100 Hz
<1> 100 Hz <1>
Max. frequency of a speed reference signal that the drive
can follow. The speed response may fluctuate with
varying motor characteristics and temperature.
Starting Torque
150% at 3 Hz 200% at 0.3 Hz
200% at
0 r/min
200% at
0 r/min
May fluctuate with characteristics and motor temperature.
Performance may differ by capacity.
Application-Specific
Auto-Tuning
Line to line
resistance
• Rotational
• Stationary
• Line to line
resistance
• Rotational
• Stationary
• Line to line
resistance
• Stationary
• Stationary
Stator
Resistance
• Encoder Offset
• Rotational
Back EMF
Constant
Automatically adjusts parameter settings that concern
electrical characteristics of the motor.
Torque Limit N/A YES YES YES
Sets the maximum torque for the motor to protect the load
and connected machinery.
Droop Function N/A N/A YES YES
Controls the load sharing between two motors that drive
the same mechanical system.
Energy-Saving
Control
N/A N/A N/A YES
Saves energy by always operating the motor at its
maximum efficiency.
Inertia Compensation N/A N/A YES YES
Improves speed accuracy when the load changes by
compensating effects of the system inertia.
DC Injection at Start
and Stop/Position
Lock
YES
(DC injection
braking at start and
stop)
YES
(DC injection
braking at start and
stop)
YES
(Position Lock)
YES
(Position Lock)
Builds up motor torque during stop in order to prevent
movement of the elevator when the brake is released at
start and applied at stop.
Torqu e
Compensation
N/A N/A YES YES
Avoids rollback at start using the analog signal from an
external load cell connected to the drive.
Anti Roll Back N/A N/A N/A YES
Prevents roll back at start without any external load
signal.
Slip Compensation YES YES N/A N/A
Adjusts the leveling speed reference in order to improve
the stopping accuracy.
Short Floor
YES YES YES YES
Optimizes the stopping time at rides where the nominal
speed is not reached.
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