Automatic Torque Boost Selection (Pr. 98 ) - Mitsubishi Electric FR-S520E Series Instruction Manual

Auxiliary function
2.11.2 Automatic torque boost selection (Pr. 98
You can choose automatic torque boost control.
Automatic torque boost control
Not only gives the motor the optimum excitation but also provides high torque
even in a low speed range.
Parameter
Automatic torque boost
98
selection (motor capacity)
<Operating conditions>
•The number of motor poles should be any of 2, 4 and 6 poles.
•Single-motor operation (One motor for one inverter)
•The wiring length from inverter to motor should be within 30m.
<Setting>
Parameter Setting
- - -
98
0.1 to 3.7kW
• Also when the Pr. 98 setting is other than "- - -", Pr. 3 "base frequency" and Pr. 19
"base frequency voltage" are valid.
• When "- - -" or "888" is set in Pr. 19, the rated output voltage is selected.
CAUTION
During operation using automatic torque boost, write to Pr. 3 and Pr. 19 is
disabled even if "2" is set in Pr. 77.
♦
Related parameters
•
Torque boost ⇒ Pr. 0 "torque boost", Pr. 46 "second torque boost" (refer to page 71)
•
Base frequency ⇒ Pr. 3 "base frequency", Pr. 19 "base frequency voltage" (refer to page 73)
•
Applied motor setting ⇒ Pr. 71 "applied motor" (refer to page 78)
•
Motor primary resistance ⇒ Pr. 99 "motor primary resistance" (refer to page 133)
Factory
Name
Setting
Ordinary V/F control and torque boost (Pr. 0, Pr. 46) are valid.
Automatic torque boost control valid
(Set the applied motor capacity or one rank lower motor capacity.)
♦
Setting
Range
0.1 to 3.7kW,
- - -
- - -
Description
132
)
Remarks
Setting is enabled when
Pr. 30 = "1"