Microstepping of an unipolar d.c. motor

Details Microstepping of an unipolar d.c. motor Microstepping of an unipolar d.c. motor

H - Electricity

02

P

318/18

H02P 8/00 (2006.01) H02P 8/22 (2006.01)

Patent

CA 1301827

MICROSTEPPING OF A UNIPOLAR D.C. MOTOR ABSTRACT OF THE DISCLOSURE High resolution microstepping of a unipolar d.c. motor is accomplished by applying from a look-up table the values of the SINE and COSINE of a given angle to the control circuit of a unipolar d.c. motor. The difference between the present position and the desired position is calculated and depending upon the magnitude of the difference, the degree of microstepping is determined from four steps per ninety electrical degrees of motor rotation to thirty-two steps. By such selection, the positioning of the output shaft of the motor is smoothly and accurately accomplished.

591277

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