LS ELECTRIC SV-iS7 Series, User Manual

Page: 231 / 491

Learning Advanced Features
214
Code Description
reverse/regeneration operations.
ADV-94 Slip Gain Mot-L
ADV-95 Slip Gain Gen-L
This is the slip compensation gain used in the region where the output
frequency is lower than the slip compensation gain switching frequency
(ADV-98). You can set the gain values differently for the
reverse/regeneration operations.
ADV-96 Slip Filter
The filter time constant used when calculating the current required for
slip compensation.
ADV-97 Slip Comp Freq
You can set the frequency at which slip compensation starts.
It is used when load compensation is not performed properly due to a
low load compensation amount when stopped.
At a constant speed, when it is above this frequency setting value, it
calculates the real time slip to compensate the load. If it is below, it
compensates the load by using the previously calculated slip. When
accelerating, the load is compensated by carrying out the sleep operation
regardless of this frequency value. When decelerated, the load is
compensated by using the previous calculated slip regardless of this
frequency.
When this value is set to 0, the slip operation is compensated in real time
at all frequencies regardless of acceleration/deceleration and constant
speed
ADV-98 Slip Gain Freq Input using the rated speed of the motor nameplate
Note
The following is a formula for calculating the rated slip:
𝑓
𝑠
=
𝑓
𝑟
× 120
𝑃
− 𝑅𝑝𝑚
𝑓
𝑠
= Rated slip frequency,
𝑓
𝑟
= Rated frequency
𝑅𝑝𝑚
= Number of rated motor rotations,
𝑃
=
Number of motor poles
Ex.) If the rated frequency is 60 Hz, the rated revolution is 1740 rpm, and the pole number is 4:
𝑓
𝑠
=
60 × 120
4
− 1740 = 60𝑟𝑝𝑚