BENSHAW Rsi S Series, Инструкция по эксплуатации

Страница: 185 / 398

Learning Advanced Features
173
Group Code Name LCD Display Parameter Setting Setting Range Unit
integral gain
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 is generated by the
counter electromotive force at idle (the counter
electromotive force is proportional to the idle
speed), the idle frequency is not determined
accurately and re-acceleration may start from
zero speed when the speed search is performed