User Guide

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2021-01-29

System and functional description

User guide for REF-22K-GPD-INV-EASY3B

A reference design for a general purpose drive

The next step is to extract the file GUI_20200819.zip; the software is available at Infineon.com. Open the folder

“Debug” and double click on “GPD Inverter.exe”. A window as shown in Figure 9 (left side) appears. You can

connect your drive system by selecting the USB device via the drop-down menu and click on “Connect.” Now

your computer is communicating with the drive system.

Figure 9

Main GUI and Config tab

Be clicking on the “Config” tab, a window will be shown as in Figure 9 (right side). You can read the Config file

from your inverter by clicking on “Read config.” Now you can change the settings. The “Control Method” can be

selected either as “V/f” or “Manual.” The parameters for the “V/f” mode can be adjusted in the “Inverter

Configuration” window. In the manual mode, you can select the “Speed” value and the “Amplitude” value

manually; see the “General” Tab of the GUI. In the “Config” tab you can also change the “IGBT Overtemp

shutdown” value. The “Load Pulse Pattern Config” window allows you to operate the inverter in a periodic or

cyclical mode. This function works only in “Manual” mode, and changes the duty-cycle value for a specific time.

This approach allows for an easy implementation of an overload pattern, as shown in Figure 3 using an

inductive-resistive load. In addition, a short-circuit test is also possible via the GUI; further details will be

explained in Section 4.6.

Via the “General” tab, you can start the motor. You can run the motor in “V/f” mode; see section “Control

Method.” The speed of the motor, hence the output frequency of the inverter, can be adapted by the slider

“Speed.” After selecting your speed, click on “Update.” You can change the “V/f” ration in the “Config” tab, as

already mentioned. Via the “Manual” control mode, you can select the “Speed” and the “Amplitude” which

represents the modulation index.