Setting The Torque Limit Level - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

3.
Configure the initial setting for the PM sensorless vector control using Pr.998. (Refer to
When the setting for the PM motor is selected in Pr.998 PM parameter initialization, the PM sensorless vector
control is selected. [PM] on the operation panel (FR-DU08) is lit when the PM sensorless vector control is set.
Setting
8009
8109
9009
9109
4.
Set parameters such as the acceleration/deceleration time and multi-speed setting.
Set parameters such as the acceleration/deceleration time and multi-speed setting as required.
5.
Set the operation command. (Refer to
Select the start command and speed command.
6.
Perform the test operation.
NOTE
• To change to the PM sensorless vector control, perform PM parameter initialization at first. If parameter initialization is
performed after setting other parameters, some of those parameters are initialized too. (Refer to
that are initialized.)
• To use a motor capacity that is one rank lower than the inverter capacity, set Pr.80 Motor capacity before performing PM
parameter initialization.
• The carrier frequency is limited during PM sensorless vector control. (Refer to
• Constant-speed operation cannot be performed in the low-speed range of 200r/min or less under current synchronization
operation. (Refer to
• During PM sensorless vector control, the RUN signal is output about 100 ms after turning ON the start command (STF, STR).
The delay is due to the magnetic pole detection.
5.3.4

Setting the torque limit level

PM PM PM
Sensorless Sensorless Sensorless Vector Vector Vector
Limit the output torque not to exceed the specified value.
The torque limit level can be set in a range of 0 to 400%. The TL signal can be used to switch between two types of torque limit.
The torque limit level can be selected by setting it with a parameter, or by using analog input terminals (terminals 1, 4). Also,
the torque limit levels of forward rotation (power driving/regenerative driving) and reverse rotation (power driving/regenerative
driving) can be set individually.
Pr. Name
22 Stall prevention operation
H500 level (Torque limit level)
85 Excitation current break
G201 point
86 Excitation current low
G202 speed scaling factor
157
OL signal output timer
M430
Description
Parameter settings for an IPM motor other than MM-CF
(rotations per minute)
Parameter settings for an IPM motor other than MM-CF
(frequency)
Parameter settings for an SPM motor (rotations per
minute)
Parameter settings for an SPM motor (frequency)
page 370.)
page 227.)
Setting
Initial value
range
*1
0 to 400%
150/200%
0 to 400 Hz
9999
9999
0 to 300%
9999
9999
0 to 25 s
0 s
9999
5.3 Speed control under Real sensorless vector control, vector control, PM sensorless vector control
page 339.)
Description
Set the torque limit level as a percentage with regards to the rated
torque as 100%.
Set a frequency of the low-speed range in the constant output
range torque characteristic selection.
SF-PR/SF-HR/SF-HRCA motor: The predetermined frequency is
applied.
Motor other than the above: 10 Hz is applied.
Set a torque scaling factor applied to the operation in the low-
speed range in the constant output range torque characteristic
selection.
SF-PR/SF-HR/SF-HRCA motor: The predetermined scaling factor
is applied.
Motor other than the above: 130% is applied.
Set the OL signal output start time at the activation of torque limit
operation.
No OL signal output.
page 225.)
page 225 for the parameters
235
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10