Title:
STEPWISE FEEDING ACTUATOR
Document Type and Number:
Japanese Patent JPS60261352
Kind Code:
A
Abstract:
PURPOSE:To enhance the stopping accuracy of an actuator, to reduce the size and to enhance the efficiency of the actuator by using an accurate position detection sensor which outputs two detection signals of different phases. CONSTITUTION:A stepwise feeding actuator has a stationary unit 1, a movable unit 2, a position sensor 3 opposed to the unit 2, and a signal processor 6 obtains inverted phase signals of output signals A, B. A current instructing circuit 5' sequentially selects one of signals from the processor 6 on the basis of step feed command pulse train thetap and moving direction command thetar from a command generator 6 to form a current command signal iC. The winding current of the unit 2 or 2 is controlled through a current controller 4 by the signal iC. A gain controller 8 measures the time interval of each pulse of the pulse train thetap, compares it with a reference time and sets the gain of the circuit 5'.
Inventors:
WATANABE MITSURU
MIYASHITA KUNIO
HAYASHIDA HIROSHI
NOTOHARA YASUO
MIYASHITA KUNIO
HAYASHIDA HIROSHI
NOTOHARA YASUO
Application Number:
JP11648684A
Publication Date:
December 24, 1985
Filing Date:
June 08, 1984
Export Citation:
Assignee:
HITACHI LTD
HITACHI ENG CO LTD
HITACHI ENG CO LTD
International Classes:
H02K33/18; H02K41/035; (IPC1-7): H02K33/18
Attorney, Agent or Firm:
Akio Takahashi
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