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.
Table 1.1 Control Modes and their Features
Motor Type
Induction Motors
Permanent
Magnet Motors
Comments
C ontrol M ode
V /f
OLV
CLV
CLV/PM
-
P aram eter Setting
A 1-02 = 0
A 1-02 = 2
A 1-02 = 3
A 1-02 = 7
Default Setting is V /f Control.
Basic D escription
V /f control
Open Loop Vector
control
Closed Loop
Vector control
Closed Loop
Vector control for
PM motors
-
Type o f A pp lication s |
M otor Type
IM
IM
IM
PM
-
P G O ption C ard
N /A
N /A
YES
YES
-
C ontrol
C haracteristics
Speed C ontrol R ange
1:40
1:200
1:1500
1:1500
May fluctuate with characteristics and motor temperature.
Speed A ccu racy
±2 to 3%
±0.2%
±0.02%
±0.02%
Speed deviation when operating at constant speed. May
fluctuate with characteristics and motor temperature.
Speed R espon se
3 Hz
(approx.)
10 Hz
50 Hz
50 Hz
Max. frequency o f a speed reference signal that the drive
can follow. May fluctuate with characteristics and motor
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.
A pp lication -S p ecific
A uto-T uning
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 o f the motor.
Torque L im it
N /A
YES
YES
YES
Sets the maximum torque for the motor to protect the load
and connected machinery.
D roop Function
N /A
N /A
YES
YES
Controls the load sharing betw een two motors that drive
the same m echanical system.
E nergy-S avin g
C ontrol
N /A
N /A
N /A
YES
Saves energy by always operating the motor at its
maximum efficiency.
Inertia C om pensation
N /A
N /A
YES
YES
Improves speed accuracy w hen the load changes by
compensating effects o f 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
m ovem ent o f the elevator w hen the brake is released at
start and applied at stop.
Torque com pensation
N /A
N /A
YES
YES
Avoids rollback at start using the analog signal from an
external load cell connected to the drive.
A nti roll back
N /A
N /A
N /A
YES
Prevents roll back at start without any external load
signal.
Slip com pensation
YES
YES
N /A
N /A
Adjusts the leveling speed reference in order to improve
the stopping accuracy.
S hort floor
YES
YES
YES
YES
Optimizes the stopping tim e at rides where the nominal
speed is not reached.
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YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual