WEG MVW3000 A0040 V023, Руководство пользователя

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MVW3000 | 8-5
8
Special Functions
MVW3000 | 8-5
„
P0636 = adjusted in the application - Parameter used to compensate the phase error between the voltage
that the inverter uses as reference for the synchronism and the actual voltage in the point where the motor will
be connected to the line.
Adjust is possible between (-180 ° and +180 º). (P0636/65536)*360 º = value in degrees .
Operating Sequency
Figure 8.5 on page 8-5 describes all the operating sequence of the signals involved in the synchronous transfer
process.
2 = inv. ready
26 = in sync.
25 = fast disab
24 = sync.
Search sinc.
5 = up ramp
Paral. line/inv
Gen. Enable
Run/Stop
Motor freq. (P0005)
Inverter status
DI (MVC4) = 25 ou 23
Start of synchronism
DO (MVC4) = 34
sinc. Ok
Command to close
switchgear
Switchgear status
Switch close
delay
P0631
∼ 2mS
DI13 (MVC3)
DI13 (MVC3)
Software delay
P0100
7 = in
ref.
MVW - Synchronous Transfer
Figure 8.5: Operating diagram of the synchronous transfer function
8.3 CELL BYPASS
The MVW3000 has the cell bypass system as optional function. For this function to be available, the MVW3000
power cells must have the bypass system integrated. The bypass system goes into operation if some fault is
detected inside a cell. If a fault occurs, the main control requests the local control to activate the bypass system,
the main control inhibits the IGBT command pulses of the cell and starts ignoring the fault signals of this cell,
informing that the cell number “X” of phase “Y” went into bypass mode.
It is important to point out that during this process, the inverter continues operating normally with a small reduction
in the output voltage. Control techniques will be used for the application to continue operating normally. For
applications that cannot operate with reduced voltage, it is recommended to use an MVW3000 with voltage
above the motor rated voltage so as to withstand the load at full voltage even with a higher number of cells out
of operation simultaneously.