DG-IRMCK203 Datasheet, PDF (17/67 Pages) International Rectifier – Application Developer’s Guide

IRMCK203 Application Developer’s Guide
3 Motor Start-up Supporting Tools
3.1 Start-up Flow
After peripheral circuitry has been implemented for the control IC, a Start-up procedure is provided to guide the user
through the commissioning of the user’s motor application. Configurable parameters are required to tailor the design
to various applications (motor and load). These configurable parameters can be modified via the host register
interface (using the ServoDesigner tool) through the communication interface. A design Spreadsheet (Drive
parameters translator) is provided to aid the user for ease of drive start-up. Using the Spreadsheet, the user enters
high-level parameters such as motor nameplate information, maximum application speed, current limit, speed and
speed regulator bandwidth. This high-level user information is translated to engineering parameters (directly used
by the drive). Figure 7 gives an overview of the commissioning steps.
Enter high level design parameters
(Motor nameplate, Current limits,
Max speed, overload etc..)
User
parameters
Drive Parameters Translator
(Spread Sheet program)
Translate user high level input parameters to
digital domain parameters (Engineering)
Engineering
parameters
ServoDesigner
Input Engineering parameters and download to
IRMCK203 drive platform
IRMCK203 based platform
Figure 7. Overview of Drive Commissioning
3.1.1 Drive Parameter Setup
The IRMCK203 support software includes an Excel workbook file that partially automates the procedure of
calculating the appropriate values for configuration and tuning parameters. In the workbook, the user enters motor
nameplate data and parameters specific to his application, and Excel formulas calculate the appropriate values for
certain write registers. In Excel, the “Save As…” function is used to export the register values to a text file, and in
ServoDesigner, the text file can be imported to fill in the register values. Then, when the Configure Motor function is
executed in ServoDesigner, the values are written to the IRMCK203 based platform.
The Excel Workbook File
The Excel workbook file is named IRMCS2031-DriveParams.xls. Double click the file to open it in Excel.
At the bottom of the workbook window, there are two sheet tabs, which select the worksheet to be displayed. The
first tab selects the “User Entries” worksheet used to set up motor and application parameters. This sheet is pre-
initialized with values appropriate for the Sanyo Denki 400W 3000rpm motor and is provided as an example. The
“User Entries” worksheet can be customized for any motor. To calculate settings for more than one motor, make
copies of the IRMCS2031-DriveParams.xls file and modify each copy to define a different motor.
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