Bardac PLX - C Urren T C O N Troli D y N a MIC Pro File; I D y N a MIC PRO FILE; Profile Enable PIN 8 4

CHA NGE PARA METERS 101
CURRENT C ON TROL 3
I DYN A MIC PROFILE 4
I DYN A MIC PROFILE 4
87)C UR LIMIT A T LO I
I DYN A MIC PROFILE 4
84)I PROFILE EN ABLE
I DYN A MIC PROFILE 4
85)SPD BRPNT A T HI I
I DYN A MIC PROFILE 4
86)SPD BRPNT A T LO I
6.8.4 CURRENT C ON TROL / I DYNA MIC PROFILE
This function w orks for both directions of rotation.
I DYN A MIC PROFILE. This clamp is used to change
the current limit according to speed. E.g.
1) To protect motors that have problems
commutating current at high speeds in field
weakening mode of operation.
2) To prevent motors overheating at low speeds.
An upper current limit of fixed value 150% is used in
the calculation. If 3)CURRENT LIMIT(%) is set lo wer than 150%, then 3)CURRENT LIMIT(%) will prevail. If
current limits in the other current limit blocks are low er then they will prevail.
Note. The SPEED breakpoints may be set so that the profile starts lo w and goes high if required. If you try to
bring the two speed breakpoints closer than within 10 % of each other, then the higher speed breakpoint is
internally assumed to be equal to the lo wer speed breakpoint + 10 %.
6.8.4.1 I DYN A MIC PROFILE / Profile enable PIN 84
The 150% CURRENT LIMIT
is available until the speed
demand reaches the SPD
BRPNT A T HI I. The current
limit then reduces linearly
as the speed increases
towards the SPD BRPNT AT
LO I. A fter passing the SPD
BRPNT A T LO I it remains
at the level set in CUR
LIMIT A T LO I. This gives a
reducing current limit with
speed.
This speed and current
are always associated
with each other
Speed
SPD BRPNT A T HI I
Current limit
150 % CURRENT LIMIT
SPD BRPNT A T LO I
CUR LIMIT A T LO I
This speed and current
are always associated
with each other
The CUR LIMIT AT LO I
prevails until the speed
demand reaches the SPD
BRPNT A T LO I. The current
limit then increases linearly
as the speed increases
towards the SPD BRPNT AT
HI I. A fter passing the SPD
BRPNT A T HI I then 150%
CURRENT LIMIT remains
available. This gives an
increasing current limit with
speed.
This speed and current
are always associated
with each other
Speed
SPD BRPNT A T HI I
Current limit
SPD BRPNT A T LO I
CUR LIMIT A T LO I
This speed and current
are always associated
with each other
150 % CURRENT LIMIT
I DYN A MIC PROFILE 4
84)PRO FILE EN ABLE
84)PRO FILE EN ABLE
DISABLED
PARA METER RANGE DEF AULT PIN
PRO FILE ENABLE EN ABLED OR DISABLED DIS ABLED 84
Enables or disables the
dynamic profile function.