Control Mode Selection - YASKAWA L1000A Technical Manual

1.2 General Description

◆ Control Mode Selection

Table 1.1 gives an overview of the L1000A motor control method (control modes) and their various features.
Motor Type
Control Mode
Parameter Setting
Basic Description
Type of Applications Motor Type
PG Option Card
Speed Control Range
Speed Accuracy
Control
Characteristics
Speed Response
Starting Torque
Auto-Tuning
Torque Limit
Droop Function
Energy-Saving
Control
Application-Specific
Inertia Compensation
DC Injection at Start
and Stop/Position
Lock
Torque compensation
Anti roll back
Slip compensation
Short floor
28
Table 1.1 Control Modes and their Features
Induction Motors
V/f OLV
A1-02 = 0 A1-02 = 2
Open Loop Vector
V/f control
control
IM IM
N/A N/A
1:40 1:200
±2 to 3% ±0.2%
3 Hz
10 Hz
(approx.)
150% at 3 Hz 200% at 0.3 Hz
• Rotational
Line to line • Stationary
resistance • Line to line
resistance
N/A YES
N/A N/A
N/A N/A
N/A N/A
YES YES
(DC injection (DC injection
braking at start and braking at start and
stop) stop)
N/A N/A
N/A N/A
YES YES
YES YES
YASKAWA ELECTRIC SIEP C710616 38A YASKAWA AC Drive L1000A Technical Manual
Permanent
Magnet Motors
CLV CLV/PM
A1-02 = 3 A1-02 = 7
Closed Loop
Closed Loop
Vector control for
Vector control
PM motors
IM PM
YES YES
1:1500 1:1500
±0.02% ±0.02%
50 Hz 50 Hz
200% at 0 200% at
r/min 0 r/min
• Stationary
• Stationary
• Rotational Stator
• Stationary Resistance
• Line to line • Encoder Offset
resistance • Rotational
Back EMF
Constant
YES YES
YES YES
N/A YES
YES YES
YES YES
(Position Lock) (Position Lock)
YES YES
N/A YES
N/A N/A
YES YES
Comments
–
Default Setting is Open Loop Vector Control.
–
–
–
May fluctuate with characteristics and motor temperature.
Speed deviation when operating at constant speed. May
fluctuate with characteristics and motor temperature.
Max. frequency of a speed reference signal that the drive
can follow. May fluctuate with characteristics and motor
temperature.
May fluctuate with characteristics and motor temperature.
Performance may differ by capacity.
Automatically adjusts parameter settings that concern
electrical characteristics of the motor.
Sets the maximum torque for the motor to protect the load
and connected machinery.
Controls the load sharing between two motors that drive
the same mechanical system.
Saves energy by always operating the motor at its
maximum efficiency.
Improves speed accuracy when the load changes by
compensating effects of the system inertia.
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.
Avoids rollback at start using the analog signal from an
external load cell connected to the drive.
Prevents roll back at start without any external load
signal.
Adjusts the leveling speed reference in order to improve
the stopping accuracy.
Optimizes the stopping time at rides where the nominal
speed is not reached.