AN863 Datasheet, PDF (14/22 Pages) STMicroelectronics – Improved sensorless control with the ST62 MCU for universal motor

IMPROVED SENSORLESS CONTROL WITH THE ST62 MCU FOR UNIVERSAL MOTOR
Figures 7, 8, 9. Speed regulation performance (with and without regulation) for
set speeds of 1700, 950 and 400 rpm on a 500W drill. Speeds
are measured after reduction, on the tool shaft
speed (rpm)
2 000
1 500
with regulation
1 000
500
without
regulation
0
0
1
2
3
4
rms motor current (A)
speed (rpm)
1 200
1 000
800
600
400
200
0
0
with regulation
without
regulation
1
2
3
4
5
rms motor current (A)
speed (rpm)
700
600
500
400
300
200
without
100
regulation
0
0
1
2
with
regulation
3
4
5
6
rms motor current (A)
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