Control Techniques Mentor MP User Manual

Menu 4
Parameter
structure
Keypad and
display
Parameter x.00
Parameter description
format
Advanced parameter
descriptions
Serial comms
protocol
Performance
68 Mentor MP Advanced User Guide
www.controltechniques.com Issue Number: 4
This parameter is set to correct any errors in the prediction of firing angle in the discontinuous current region.
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.
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,
such as a motor field.
There is hysteresis on bridge change over to prevent oscillation between the two bridges under lightly loaded conditions. In applications which require
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.
4.34 Discontinuous current controller Ki gain
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1111
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
111
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
111
Default 0
Update rate Background read

Control Techniques Mentor MP Specifications

General

Brand	Control Techniques
Model	Mentor MP
Category	DC Drives
Language	English