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IMPROVED SENSORLESS CONTROL WITH THE ST62 MCU FOR UNIVERSAL MOTOR

Hitting afterwards any key (except “e”) will resume normal operation. Hitting key “m”

twice stores the data presently displayed on the screen in a text file named

VISU.PRN under the same format as NUMBER.PRN, for latter use. Hitting key “e”

terminates the program execution. Figure 14 is an example of a file VISU.PRN im-

ported into a spreadsheet program. This is also what is displayed on the PC screen in

real time while the motor is running, and the program VISU.EXE is executing.

Figure 13. Connection motor control board - Personal computer by RS232 serial link.

The DB9 connector must be connected to the COM 1 serial port of the

computer.

Figure 14. Measured data as displayed on the PC screen. The horizontal axis represents

640 points, taken every 20 mS, for a total of 12.8 seconds. The curves show

the regulation response to a load step.