ABB FDNA-01, Руководство пользователя

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Communication profiles 81
Scalar mode
When the drive is operating in the scalar mode, the adapter
module provides the drive with a frequency reference. The ODVA
AC/DC drive profile uses rpm units for the Speed Reference. The
drive frequency reference is calculated as follows:
where
For example, for a 4-pole 60 Hz motor (Mss = 1800 rpm) with a
unit of 1 rpm and an ODVA Speed Reference of 900, the drive
frequency reference is:
Vector mode
When the drive is operating in the vector mode, the adapter
module provides the drive with a speed reference. The ODVA
AC/DC drive profile uses rpm units for the speed reference. The
drive speed reference is calculated as follows:
where
Dfr = Drive frequency reference in Hz
Osr = ODVA Speed Reference
Us
= ODVA speed unit (see 10 ODVA SPEED SCALE on page 41 )
Mf = Motor nominal frequency in Hz
Mss = Motor synchronous speed in rpm (not motor nominal speed)
Dsr = Drive Speed Reference in rpm
Osr = ODVA Speed Reference
Us
= ODVA speed unit (see 10 ODVA SPEED SCALE on page 41 )
Mss
Mf Us Osr
Dfr
× ×
=
Hz 30
rpm 1800
Hz 60 rpm 1 900
Mss
Mf Us Osr
Dfr
=
× ×
=
× ×
=
Us Osr Dsr
× =