Title:
DRIVE CIRCUIT FOR STEPPING MOTOR
Document Type and Number:
Japanese Patent JPS60216794
Kind Code:
A
Abstract:
PURPOSE:To simplify the construction of a generator of a control signal for switching excitation system by a control signal for switching the system by differentiating an excitation switching signal to reset a distributor. CONSTITUTION:When an excitation switching signal Vd is shifted from H level to L level, i.e., an excitation system is switched from 2-phase excitation to 2-phase excitation, a differentiation signal having a negative polarity pulse is output, applied to a reset terminal RE of a distributor 6, reset, and 2-phase excitation is started. When the signal Vd is shifted from L level to H level, i.e., the system is switched from 2-phase excitation to 1-2-phase excitation, the output of a differentiator 8 becomes reverse bias with respect to a diode 9. Accordingly, the differentiation signal is not applied to the terminal RE, the distributor 6 is not reset, but the 1-2-phase excitation is started.
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Inventors:
KONI HIROAKI
Application Number:
JP7122184A
Publication Date:
October 30, 1985
Filing Date:
April 10, 1984
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS LTD
International Classes:
H02P8/14; H02P8/18; (IPC1-7): H02P8/00
Attorney, Agent or Firm:
Ishida Choshichi