“A” Group: Standard Functions
Optimal Accel/Decel Operation, continued...Configuring Drive | Parameters |
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Functions
The acceleration time is controlled to maintain output current below the level set by the Overload Restriction Function if enabled (Parameters B021/B024, B022/B025, and B023/ B026). If Overload Restriction is not enabled, then the current limit used is 150% of the inverter’s rated output current.
The deceleration time is controlled so that the output current is maintained below 150% of the inverter’s rated current, and the DC bus voltage is maintained below the OV Trip level (358V or 770V).
NOTE: DO NOT use Optimal Accel/Decel (A085 = 02) when an application...
•has a requirement for constant acceleration or deceleration
•has a load inertia more than (approx.) 20 times the motor inertia
•uses internal or external regenerative braking
•uses any of the vector control modes (A044 = 03, 04, or 05). This function is ONLY compatible with V/F control.
NOTE: If the load exceeds the rating of the inverter, the acceleration time may be increased.
NOTE: If using a motor with a capacity that is one size smaller than the inverter rating, enable the Overload Restriction function (B021/B024) and set the Overload Restriction Level (B022/ B025) to 1.5 times the motor nameplate current.
NOTE: Be aware that the acceleration and deceleration times will vary, depending on the actual load conditions during each individual operation of the inverter.
The SJ300 inverter features
frequency | A094=00 | frequency | A094=01 |
Accel 2
Accel 2
Accel 1
Frequency
t A095
transition point
2CH | 1 |
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| Accel 1 |
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input | 0 |
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t