Emerson Mentor MP User Manual

Menu 4
Parameter
Parameter
descrip
tion
protocol
Performance
This
parameter
is
set
to
correct
any
errors
in
the
prediction
of
firing
angle
in
the
discontinuous
current
region.
When
enabled
an
additional
safety
margin
of
1
supply
cycle
is
added
to
the
bridge
changeover
logic.
This
may
be
required
for
highly
inductive
loads,
There
is
hysteresis
on
bridge
change
over
to
prevent
oscillation
between
the
two
bridges
under
lightly
loaded
conditions.
In
applications
which
require
structure
Keypad and
format
Advanced parameter
descriptions
Serial comms
Pr 4.34 = 1131 x R x Imax / V rms
Where :
L is the load inductance in Henries
R is the load resistance in ohms
f is the supply frequency in Hertz
Imax is the peak load current (including any overload) in amps
V rms is the line-to-line supply voltage in volts.
such as a motor field.
fine control of the current the bridge change over hysteresis can be reduced from 1.6 % to 0.2 % of the drive maximum current by setting this
parameter.
68 Mentor MP Advanced User Guide
www.onxcontrol.com Issue Number: 4
4.34
Discontinuous current controller Ki gain
Coding
Bit
SP
FI
DE
Txt
VM
DP
ND
RA
NC
NV
PT
US
RW
BU
PS
1
1
1
1
Range
0 to 4000
Default
200
Second motor
parameter
Pr 21.12
Update rate
Background read
4.35
Extra safe bridge change
Coding
Bit
SP
FI
DE
Txt
VM
DP
ND
RA
NC
NV
PT
US
RW
BU
PS
1
1
1
Default
0
Update rate
Background read
4.36
Reduced hysteresis for bridge change over
Coding
Bit
SP
FI
DE
Txt
VM
DP
ND
RA
NC
NV
PT
US
RW
BU
PS
1
1
1
Default
0
Update rate
Background read

Emerson Mentor MP Specifications

General

Brand	Emerson
Model	Mentor MP
Category	DC Drives
Language	English