JPH0174591U

JPH0174591U -

Info

Publication number: JPH0174591U
Application number: JP1987169944U
Authority: JP
Priority date: 1987-11-06
Filing date: 1987-11-06
Publication date: 1989-05-19

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例のブロツク図、第２
図は駆動回路の回路構成図、第３図は上記実施例
において、通常モードまたは正転修正モード選択
時にステツプモータを正転駆動する時の動作を説
明するタイミングチヤート、第４図は上記実施例
において逆転修正モード選択時にステツプモータ
を逆転駆動する時の動作を説明するタイミングチ
ヤート、第５図はステツプモータの概略平面図、
第６図は従来の電子時計用のステツプモータ駆動
装置が逆転駆動時に駆動用コイルに印加する交番
パルスの波形図、第７図ａ〜ｅは上記従来の電子
時計用のステツプモータ駆動装置によるステツプ
モータの逆転駆動制御時のステツプモータの動作
を説明する図である。１……ステータ、２……ロータ、３……駆動用
コイル、１１……発振回路、１２……分周回路、
１５……逆転修正信号発生回路、１８……駆動回
路、１９……制御回路、２０……オアゲート、Ｐ
_２１，Ｐ_３１……第１のパルス、Ｐ_２２，Ｐ_３２……第２のパルス、Ｐ_２３，Ｐ_３３……第３のパ
ルス、Ｓ_１，Ｓ_２……スイツチ。 Fig. 1 is a block diagram of an embodiment of the present invention;
3 is a circuit diagram of the drive circuit, FIG. 3 is a timing chart illustrating the operation of driving the step motor in normal rotation when normal mode or normal rotation correction mode is selected in the above embodiment, and FIG. 4 is a timing chart for the above embodiment. 5 is a timing chart illustrating the operation of driving the step motor in reverse when the reverse correction mode is selected; FIG. 5 is a schematic plan view of the step motor;
FIG. 6 is a waveform diagram of alternating pulses applied to the drive coil during reverse drive by the conventional step motor drive device for electronic watches, and FIGS. FIG. 3 is a diagram illustrating the operation of the step motor during reverse rotation drive control of the motor. 1... Stator, 2... Rotor, 3... Drive coil, 11... Oscillation circuit, 12... Frequency dividing circuit,
15... Reverse correction signal generation circuit, 18... Drive circuit, 19... Control circuit, 20... OR gate, P
₂₁ , P ₃₁ ...first pulse, P ₂₂ , P ₃₂ ... second pulse, P ₂₃ , P ₃₃ ... third pulse, S ₁ , S ₂ ... switch.

Claims

[Claims for Utility Model Registration] A rotor with two magnetic poles, a stator that rotates the rotor and provides a stationary stable point, and a drive coil that magnetizes the stator, with alternating pulses applied to both ends of the drive coil. In the drive device for a step motor for an electronic watch, which rotates the rotor forward or backward by applying an electric current, the alternating pulse that rotates the rotor in the reverse direction consists of three consecutive pulses whose polarity changes alternately; An electronic watch characterized in that the second pulse secondly applied to the drive coil has a larger absolute value of voltage than the first pulse first applied to the drive coil. step motor drive device.