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Title:
STEPPING MOTOR AND AUTOMOBILE
Document Type and Number:
Japanese Patent JP2018057087
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To suppress a phenomenon that a contact part of a rotor beats a stopper, in a stepping motor with a built-in stopper.SOLUTION: A stepping motor according to an embodiment comprises a stopper, a rotor, and a plurality of coils. The rotor has a contact part contacting with the stopper. The plurality of coils rotate the rotor, and form an excitation vector. In an initialization period, the plurality of coils form an initial excitation vector for exciting an excitation phase corresponding to a position of the stopper, form a first excitation vector in the vicinity to an excitation vector in an opposite direction to the initial excitation vector after the formation of the initial excitation vector, and form a second excitation vector in the vicinity to the initial excitation vector after the formation of the first excitation vector. The first excitation vector forms a predetermined electric angle in a predetermined rotation direction with respect to the initial excitation vector. The second excitation vector forms a predetermined electric angle in a predetermined rotation direction with respect to the first excitation vector.SELECTED DRAWING: Figure 5

Inventors:
FUJITANI SAKAE
Application Number:
JP2016187583A
Publication Date:
April 05, 2018
Filing Date:
September 26, 2016
Export Citation:
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Assignee:
MINEBEAMITSUMI INC
International Classes:
H02P8/08; G01D11/00; G01D13/22; H02P8/32
Attorney, Agent or Firm:
Toranomon Intellectual Property Office



 
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