BENSHAW RSi GM2 Series, Инструкция по эксплуатации

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Learning Advanced Features
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GM2 Series VFD
Speed Search Operation
Speed Search is used to start the inverter while the motor/load are already spinning (idling). Speed
Search synchronizes the inverter output (voltage and frequency) to that of the spinning motor. This
is accomplished by ramping the output voltage up, then ramping the output frequency down..
Speed Search estimates the motor rotation speed based on the inverter output current, therefore it
may not match the exact speed. Speed Search can prevent faults that occur when starting the
inverter while the motor/load are spinning. There are two modes of Speed Search (Flying Start-1
and Flying Start-2). The main differerence is that Flying Start-2 can detect direction of motor
rotation. There are also four conditional settings of Speed Search. These include normal starting,
starting after a fault reset, starting after a power interruption, and auto-starting with the initial
application of power to the inverter.
Group Code Name Setting
Setting
Range
Unit
Cn
70 Speed search mode selection
0 Flying Start-
1
- -
1 Flying Start-
2
71 Speed search operation
selection
0000* - bit
72 Speed search reference
current
- Below 75 kW 80 – 200 %
73 Speed search proportional
gain
100 0 – 9999 -
74 Speed search integral gain 200 0 – 9999 -
75 Output block time before
speed search
1.0 0 – 60 sec
OU
31 Multi-function (digital) relay1
item
19 Speed
Search
- -
33
Multi-function (digital) relay2
item
*Displayed as on the Keypad.