BENSHAW RSi GM2 Series, Instruction Manual

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Learning Basic Features
79
Lea
rni
890054-00-00
GM2 Series VFD
Auto Torque Boost
In V/F operation, auto torque boost adjusts the output voltage when the motor cannot be started
due to lack of starting torque. It provides a calculated voltage boost based on torque current.
Group Code Name Setting Setting Range Unit
dr 15
Torque boost
mode
1 Auto 0 – 1 -
dr 26
Auto torque
boost filter gain
2 1 – 1000 -
dr 27
Auto torque
boost motoring
voltage gain
50.0 0.0 – 300.0 %
dr 28
Auto torque
boost
regeneration
voltage gain
50.0 0.0 – 300.0 %
Set dr.15 (Torque Boost mode) to 1 (auto). Parameters dr.26, dr.27, and dr.28 can be adjusted when
there is a lack of starting torque or when excessive current is flowing. This method outputs voltage
by adding a voltage boost quantity calculated using torque current values from the manual torque
boost settings (dr.16, dr.17).
Auto Torque Boost does not require Auto-Tuning but does require
motor’s nameplate ratings
entered in the following parameters:
Code Name Setting Range
dr.18 Base frequency 30.00
–400.00 (Hz)
bA.12 Rated slip speed 0
–3000 (Rpm)
bA.13 Motor rated current 1.0
–1000.0 (A)
bA.14 Motor noload current 0.0
–1000.0 (A)
If you do not use motor’s nameplate ratings, each parameter is set to a default value and the auto
boost function may not be as effective.