Low-Speed Range Torque Characteristics - Mitsubishi Electric FR-A800 Series Instruction Manual

Pr.
Current average value
557 monitor signal output
reference current
820 Speed control P gain 1
821 Speed control integral time 1 0.333 s
Torque control P gain 1
824 (current loop proportional
gain)
Torque control integral time
825
1 (current loop integral time)
870 Speed detection hysteresis
Regeneration avoidance
885 compensation frequency
limit value
Energy saving monitor
893
reference (motor capacity)
C14 Terminal 1 gain frequency
(918) (speed)
Per-unit speed control
1121
reference frequency
—: Not changed
*1 Initial value for the FR-A820-03160(55K) or lower and FR-A840-01800(55K) or lower.
*2 Initial value for the FR-A820-03800(75K) or higher and FR-A840-02160(75K) and higher.
*3 When Pr.71 Applied motor = "333, 334, 8093, 8094, 9093, or 9094", the Pr.71 setting is not changed.
*4 When a value other than "9999" is set, the set value is not changed.
*5 200 r/min when Pr.788 Low speed range torque characteristic selection = "0".
*6 13.33 Hz when Pr.788 Low speed range torque characteristic selection = "0".
*7 110% for SLD, 120% for LD, 150% for ND, and 200% for HD (Refer to Pr.570 Multiple rating setting on
*8 The Pr.702 Maximum motor frequency is used as the maximum motor frequency (rotations per minute). When Pr.702 ="9999 (initial value)",
the Pr.84 Rated motor frequency is used as the maximum motor frequency (rotations per minute).
*9 The setting value is converted from frequency to rotations per minute. (It differs according to the number of motor poles.)
*10 Refer to
NOTE
• If IPM parameter initialization is performed in rotations per minute (Pr.998 = "3003, 8009, or 9009"), the parameters not listed
in the table and the monitor items are also set and displayed in rotations per minute.
5.2.5
PM PM PM
The torque characteristics in a low-speed range under PM sensorless vector control can be changed.
Pr.
788 Low speed range torque
G250 characteristic selection
Second motor low-speed
747
range torque characteristic
G350
selection
Downloaded from ManualsNet.com
Induction
motor
0 (initial value)
Name
FM
Inverter rated
current
60%
100%
5 ms
0 Hz
6 Hz
Inverter rated
current
60 Hz
*1
120 Hz
*2
60 Hz
page 833 for the rated motor current of MM-CF.

Low-speed range torque characteristics

Initial
Name
value
9999
9999
search engine
Setting
PM motor (setting in
rotations per minute)
8009
9009
3003 (MM-
(other
CF)
CA
than MM-
CF)
Rated
motor
Pr.859
*10
current
30%
0.333 s
100%
20 ms
*9
8 r/min
0.5 Hz
Pr.84 ×
200 r/min
10%
Motor capacity (Pr.80)
50 Hz 2000 r/min Pr.84
Maximum
motor
rotations
3000 r/min
per
*8
minute
Setting
range
Disables the low-speed range torque characteristic (current
0
synchronization operation).
Enables the low-speed range torque characteristic (high frequency
*1
9999
superposition control)
Disables the low-speed range torque characteristic (current
0
synchronization operation) while the RT signal is ON.
Enables the low-speed range torque characteristic (high frequency
*1
9999
superposition control) while the RT signal is ON.
Setting increments
PM motor (setting in
frequencies)
8109
9109 3003,
3103 (MM-
(other 8009,
CF)
than MM- 9009
CF)
Rated
0.01 A
motor
Pr.859
*2
0.1 A
*10
current
1%
0.001 s
1%
0.1 ms
0.5 Hz 1 r/min
Pr.84 ×
13.33 Hz 1 r/min
10%
0.01 kW
0.1 kW
133.33 Hz Pr.84 1 r/min
Maximum
motor
200 Hz 1 r/min
*
frequency
8
page 343.)
Operation
5.2 Control method
1
0, 3003,
2
8109, 9109
*1
3
4
5
0.01 Hz
0.01 Hz
6
*1
*2
7
0.01 Hz
8
0.01 Hz
9
10
233
5. PARAMETERS