Setting The Torque Limit Level - Mitsubishi Electric FR-A800 Series Instruction Manual

 Driving a PM motor other than MM-CF
Operating procedure
1.
Setting the applied motor (Pr.9, Pr.71, Pr.80, Pr.81, Pr.83, and Pr.84). (Refer to
Set "8093 (IPM motor other than MM-CF) or 9093 (SPM motor)" in Pr.71 Applied motor. Set Pr.9 Rated motor
current, Pr.80 Motor capacity, Pr.81 Number of motor poles, Pr.83 Rated motor voltage, and Pr.84 Rated
motor frequency according to the motor specifications. (Setting "9999 (initial value)" in Pr.80 or Pr.81 selects V/F
control.)
2.
Performing the offline auto tuning for a PM motor (Pr.96) (Refer to
Set "1" (offline auto tuning without rotating motor (for other than MM-CF)) in Pr.96, and perform tuning.
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
Sensorless Sensorless Vector Sensorless 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.
22 Stall prevention operation
H500 level (Torque limit level)
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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 (in rotations per minute) for an SPM
motor
Parameter settings (in frequencies) for an SPM motor
page 233.)

Setting the torque limit level

PM PM PM
Name Initial value
*1
150/200%
5.3 Speed control under Real sensorless vector control, vector control, PM sensorless vector control
search engine
page
Description
page 389.)
Setting
range
Set the torque limit level as a percentage with regards to the rated
0 to 400%
torque as 100%.
page 528, page 551.)
551.)
page 231.)
page 231 for the parameters
page 356.)
Description
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10
245