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1.2 General Description
32
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
◆
Control Mode Selection
gives an overview of the U1000 control modes and their various features:
Table 1.2 Control Modes and their Features
Motor Type
<1> Use a larger drive or increase the drive capacity to achieve this value.
<2> Available when High Frequency Injection is enabled (n8-57 = 1).
Induction Motors
Permanent Magnet Motors
Comments
Control Mode
V/f
V/f w/PG
OLV
CLV
OLV/PM
AOLV/PM
CLV/PM
–
Parameter Setting
A1-02 = 0
A1-02 = 1
A1-02 = 2
A1-02 = 3
A1-02 = 5
A1-02 = 6
A1-02 = 7
Default Setting is Open Loop Vector
Control.
Basic Description
V/f control
V/f control
using motor
speed
feedback
Open Loop
Vector control
Closed Loop
Vector control
Open Loop
Vector control
for PM motors
Open Loop
Vector control
for IPM
motors
Closed Loop
Vector control
for PM motors
–
Type of
Applications
Motor Type
IM
IM
IM
IM
PM
IPM
PM
–
Multi Motor
YES
N/A
N/A
N/A
N/A
N/A
N/A
–
Motor data
unknown
YES
N/A
N/A
N/A
N/A
N/A
N/A
–
High Speed
Accuracy
N/A
YES
YES
YES
YES
YES
YES
–
High Speed
Response
N/A
N/A
YES
YES
N/A
YES
YES
–
Zero Speed
Control
N/A
N/A
N/A
YES
N/A
YES
YES
–
Torque Control
Operation
N/A
N/A
N/A
YES
N/A
YES
YES
–
Torque Limit
Operation
N/A
N/A
YES
YES
N/A
N/A
YES
–
PG Option Card
N/A
PG-B3 or
PG-X3
N/A
PG-B3 or
PG-X3
N/A
N/A
PG-X3
–
Control
Characteristics
Speed Control
Range
1:40
1:40
1:200
1:1500
1:20
1:20
1:100
1:1500
May fluctuate with characteristics and
motor temperature.
Enabled for 1:100 when n8-57 = 1 (high
frequency injection enabled).
Speed Accuracy
±
2 to 3%
±
0.03%
±
0.2%
±
0.02%
±
0.2%
±
0.2%
±
0.02%
Speed deviation rate between speed
reference value and motor speed
(100% = rated speed, motor temperature
25
°
C
±
10
°
C) when operating at normal
status and when load is stable.
Speed Response
3 Hz
(approx.)
3 Hz
(approx.)
10 Hz
100 Hz
10 Hz
10 Hz
100 Hz
Max. frequency of a speed reference signal
that the drive can follow. May fluctuate
with characteristics and motor temperature.
Starting Torque
150% at 3 Hz 150% at 3 Hz
200% at
0.3 Hz
200% at
0 min
100% at
5% speed
100% at 5%
speed
200% at
0 min
-1
200% at
0 min
-1
May fluctuate with characteristics and
motor temperature.
Performance may differ by capacity.
Application-
Specific
Auto-Tuning
• Energy
Saving
Tuning
• Line to
line
resistance
• Energy
Saving
Tuning
• Line to
line
resistance
• Rotational
• Stationary
• Line to
line
resistance
• Rotational
• Stationary
• Line to
line
resistance
• ASR
• Inertia
• Stationary
• Stator
Resistance
• Stationary
• Stator
Resistance
• Rotational
• Stationary
• Stator
Resistance
• ASR
• Inertia
• Encoder
Offset
• Back EMF
Constant
Automatically adjusts parameter settings
that concern electrical characteristics of the
motor.
Torque Limit
N/A
N/A
YES YES
N/A
YES
YES
Sets the maximum torque for the motor to
protect the load and connected machinery.
Torque Control
N/A
N/A
N/A
YES
N/A
N/A
YES
Allows direct control of motor torque for
tension control and other such applications.
Droop Function
N/A
N/A
N/A
YES
N/A
N/A
YES
Sets the slip for the load torque of the
motor. Used for motor load distribution.
Zero Servo
Control
N/A
N/A
N/A
YES
N/A
N/A
YES
Locks the rotor position.
Speed Search
YES
YES
YES
–
YES
YES
YES
Bi-directional speed detection of a coasting
motor to restart it without stopping.
Energy-Saving
Control
YES
YES
YES
YES
N/A
YES (IPM
motors only)
YES (IPM
motors only)
Saves energy by always operating the
motor at its maximum efficiency.
Feed Forward
Control
N/A
N/A
N/A
YES
N/A
N/A
YES
Improves speed accuracy when the load
changes by compensating effects of the
system inertia.
Inertia Tuning,
ASR Tuning
N/A
N/A
N/A
YES
N/A
N/A
YES
Provides automatic Speed Control and
Feed Forward function tuning.
Commercial
Power
Switching
Selection
YES
N/A
N/A
N/A
N/A
N/A
N/A
When the output frequency matches the
power supply frequency 60 Hz, the PWM
switching operation stops and switches to
operation with a direct commercial power
supply connection.
High Frequency
Injection
N/A
N/A
N/A
N/A
N/A
YES (IPM
motor)
N/A
Greatly increases the speed control range
of an IPM motor.
SIEP_C710636_02B_1_0.book 32 ページ 2015年11月25日 水曜日 午後4時56分