ARRANGEMENT FOR STARTING ELECTRIC MOTOR

摘要

The control circuit includes a reference sig. genrtr. comprising a sig. genrtr, cir., a crystal oscillator and a ref. counter, a mono- stable multivibrator giving the output of the desired sig. phase thru variable resistor, a pulse generator cir. giving sampling sigs., a data counter counting width of the pulse from the multivibrtr. by demulcified sig. from the ref. sig. genertr., a decoder controlling phases for mode opertns of cirs., and pulse width modulator giving sig. outputs to control the phase of a motor. The whole function of the control cir. can be digitalized to be integrated into a chip for highly precise control operation.