LSIS LSLV-S100 - Page 185

Learning Advanced Features
171
Group
Code
Name
LCD Display
Parameter Setting
Setting Range
Unit
71
Speed search
operation selection
Speed Search 0000* - bit
72
Speed search
reference current
SS Sup-Current - Below 75kW
80–200
%
73
Speed search
proportional gain
SS P-Gain 100 0–9999 -
74
Speed search integral
gain
SS I-Gain 200 0–9999 -
75
Output block time
before speed search
SS Block Time 1.0 0–60 sec
OU
31
Multi-function relay 1
item
Relay 1
19 Speed Search - -
33
Multi-function output
1 item
Q1 Define
*Displayed as on the Keypad.
Speed Search Operation Setting Details
Code
Description
Cn.69 SS Pulse Curr
Sets the speed search current based on the motor’s rated current. This
parameter is only displayed when dr.09 (Control Mode) is set to 6 (PM
Sensorless).
Cn.70 SS Mode
Select a speed search type.
Setting
Function
0
Flying Start-1
The speed search is carried out as it controls the
inverter output current during idling below the
Cn.72 (SS Sup-Current) parameter setting. If the
direction of the idling motor and the direction of
operation command at restart are the same, a
stable speed search function can be performed at
about 10 Hz or lower. However, if the direction of
the idling motor and the direction of operation
command at restart are different, the speed search
does not produce a satisfactory result because the
direction of idling cannot be established.
1
Flying Start-2
The speed search is carried out as it PI controls the
ripple current which is generated by the counter
electromotive force during no-load rotation.
Because this mode establishes the direction of the
idling motor (forward/reverse), the speed search
function is stable regardless of the direction of the
idling motor and direction of operation command.
However because the ripple current is used which