DG-IRMCK203 Datasheet, PDF (21/67 Pages) International Rectifier – Application Developer’s Guide

IRMCK203 Application Developer’s Guide
Stopping Mode
The drive stopping mode can be configured using this parameter.
Coast Stop (enter 0) : when stop command is issued, the inverter will switch off
immediately. The motor speed will be decreased by windage and friction.
Ramp Stop (enter 1): When stop command is issued, the inverter will control the
motor speed down to zero. The rate of stopping is determined by the setting of
deceleration rate and Regen current limit.
Note: Ramp stop will regenerate energy back to the dc bus, hence will increase dc
bus voltage during fast deceleration, please ensure brake is installed if Ramp stop
mode is used.
Step 4. Enter Advance Information (Hardware Dependent)
The advanced information section of the motor setup worksheet contains parameter settings that are specific to the
hardware platform. It is not necessary to modify these settings for use with the IRMCS2031 development
platform.
Deadtime
Dc Bus Scale
I Shunt
Amp Gain
This parameter sets the inverter dead time delay. The enter unit is in usec. The
setting depends on what type (IGBT, MOSFET etc..) of main power switches
being used in the inverter. Users should refer to the Deadtime value suggested by
the power device manufacturer.
This is the dc bus scaling in digital counts per volt of dc bus. The information is
the hardware scaling of dc bus feedback. For instance: if user's hardware scales
down the dc bus 100 times, then at 500 V dc bus level, 5V will appear at the A/D
converter (ADS7818) input. The ADS7818 maps 5V (at Vcc = 5) to 4095 digital
counts. Therefore, the Bus scaling is 4095/500 = 8.19 cts/V.
This parameter provides current feedback selection. Please enter "0" if using
IR2175 , "1" if using Inverter Leg Shunt
This parameter is only required if Leg Shunt is selected as the current feedback
choice, and specifies the amplifier gain from Leg shunt sampling resistor to input
of A/D converter. For instance, in the hardware example given in Section 2.4.2,
the Leg shunt amplifier gain is 7.97.
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