Highest Level Of Driving Performance; Exhibit Best Performance Of The General-Purpose Motor; Higher Accuracy Operation Is Realized With A Motor With Encoder; V/F Control And Advanced Magnetic Flux Vector Control Operations - Mitsubishi Electric FR-A700 Manual

High accuracy/fast response speed operation by the vector control
can be performed with a general-purpose motor without encoder.
•
Maximum of high torque can be generated at an ultra low
speed of (0.4K to 3.7K).
•
Torque control operation can be performed also.* (Torque control
range 1:20, absolute torque accuracy + _ 20%, repeated torque
accuracy + _ 10%)
* Since torque control can not be performed in the low speed regeneration region and
at a low speed with light load, use the vector control with encoder.
•
Response level has been improved.
(0.3Hz to 60Hz driving only)
Torque limit function is effective to prevent machine from damage (prevention against
damage of grinding machine tools, etc.) against the sudden disturbance torque.
1500
150
0 0
When the motor SF-JR 4P 3.7kW is used
Torque response level to the sudden load fluctuation has been greatly improved as compared to the conventional model (FR-A500).
The motor speed variation is minimized to maintain a constant speed. It is suitable for a sawmill machine, etc.
200ms
560ms
The actual motor speed
decelerates instantly at the
moment when the load 100
torque increases and then
it immediately returns to
the set speed.
0
FR-A700 series under real sensorless vector control
FR-A500 series under advanced magnetic flux vector control
200
150
100
95
70
50
0 3 6 60 120
When the motor SF-JR 4P is used (at 220V input)
The delay to the input command has been minimized. The response
time has been reduced to half as compared to the conventional model
(FR-A500). It is suitable for cycle-operation applications.
1500
0
200ms
940ms
The actual motor speed
increases instantly at the
300
moment when the load
torque decreases and then
it immediately returns to
the set speed.
0
Vector control operation can be performed using a motor with encoder*
fast response/high accuracy speed control (zero speed control, servo lock) can be realized with the inverter.
*1 A plug-in option for encoder feed back control (FR-A7AP) is necessary.
*2 Only a pulse train+code system is employed for pulse command system when
performing position control with an inverter and the FR-A7AP.
The maximum pulse input is 100kpps.
•
3
(both driving/regeneration*
(100% means 3000r/min)
(with model adaptive speed control)
*3 Regeneration unit (option) is necessary for regeneration
•
4
*
4
*
*4 Online auto tuning (with adaptive magnetic flux observer)
Since the load inertia of the motor is automatically estimated online
to calculate the optimum speed control gain and position loop gain,
gain adjustment is easily done. By repeating acceleration and
deceleration, load inertia is automatically estimated.
1200
1000
800
600
400
200
0 1 2 3
Operation with high torque accuracy less susceptible to the motor
second resistance value change due to a temperature change is
realized with online tuning (adaptive magnetic flux observer). This
operation is appropriate for applications such as a winder/printing
machine (tension control) which is controlled by torque.
120
110
100
90
80
70
60
30 50 70 90 110
Since V/F control and advanced magnetic flux vector control operations are also available,
you can replace the conventional model (FR-A500 series) without anxiety.
•
(zero speed control, servo lock)
*5 Only a pulse train+code method is employed for pulse command method when performing position control with an inverter and the FR-A7AP. The maximum pulse input is 100kpps.
*6 Regeneration unit (option) is necessary for regeneration
1 . Torque control/position control* 2 as well as
200
)
150
100
95
70
50
0 90 180 1800 3600
When the motor with encoder, SF-JR4P, is used (at 220V input)
Use of vector control dedicated motor realizes 100% of the
continuous operation torque even at a low speed. It is suitable
for winder and unwinder applications. Motors with speed ratio
of 1000/2000r/min, 1000/3000r/min and 500/2000r/min
specifications are available and they can support applications
whose winding diameter greatly changes. Decreasing the
rated speed will increase the rated torque, so you can select a
motor with a smaller capacity. (The inverter one rank higher
than the motor in capacity needs to be selected depending on
the motor capacity.)
•
SF-V5RU 1500/3000 1.5kW to 55kW
SF-V5RU1 1000/2000 1.5kW to 37kW
SF-V5RU3 1000/3000 1.5kW to 30kW
SF-V5RU4 500/2000 1.5kW to 15kW
SF-THY 1500/3000 75kW to 250kW
General-purpose motor
1:10 (6 to 60Hz : Driving) 10 to 20rad/s
(without encoder)
General-purpose motor
1:120 (0.5~60Hz : Driving) 20 to 30rad/s
(without encoder)
General-purpose motor
1:200 (0.3~60Hz : Driving) 120rad/s
(without encoder)
1:1500 (1~1500r/min:
General-purpose motor (with encoder)
300rad/s
5
*
Dedicated motor
Both driving/regeneration)
* 6