JP2007047449A5 - - Google Patents

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Publication number
JP2007047449A5
JP2007047449A5 JP2005231800A JP2005231800A JP2007047449A5 JP 2007047449 A5 JP2007047449 A5 JP 2007047449A5 JP 2005231800 A JP2005231800 A JP 2005231800A JP 2005231800 A JP2005231800 A JP 2005231800A JP 2007047449 A5 JP2007047449 A5 JP 2007047449A5
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Japan
Prior art keywords
stepping motor
optical element
optical
circuit
electromotive force
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Pending
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JP2005231800A
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Japanese (ja)
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JP2007047449A (en
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Priority to JP2005231800A priority Critical patent/JP2007047449A/en
Priority claimed from JP2005231800A external-priority patent/JP2007047449A/en
Publication of JP2007047449A publication Critical patent/JP2007047449A/en
Publication of JP2007047449A5 publication Critical patent/JP2007047449A5/ja
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Claims (7)

光学素子と、前記光学素子を駆動するステッピングモータと、前記ステッピングモータへの通電を制御する制御手段と、前記ステッピングモータの励磁コイルにおいて発生する逆起電力を検出する検出手段と、前記ステッピングモータが非通電状態になる前の最後の励磁状態を記憶する記憶手段とを有し、
前記制御手段は、前記ステッピングモータの非通電状態において前記検出手段により前記逆起電力を検出した場合に、前記ステッピングモータを前記記憶された励磁状態とするための前記ステッピングモータへの通電を行うことを特徴とする光学機器。
An optical element; a stepping motor that drives the optical element; a control unit that controls energization of the stepping motor; a detection unit that detects a counter electromotive force generated in an excitation coil of the stepping motor; and the stepping motor Storage means for storing the last excitation state before the non-energized state,
The control means energizes the stepping motor to bring the stepping motor into the stored excitation state when the detecting means detects the counter electromotive force in a non-energized state of the stepping motor. Optical equipment characterized by.
前記制御手段は、前記非通電状態において所定より大きい前記逆起電力を検出した場合に、前記光学素子を該光学素子の位置制御上の基準位置に移動させるように前記ステッピングモータへの通電を行うことを特徴とする請求項に記載の光学機器。 The control means energizes the stepping motor so as to move the optical element to a reference position in position control of the optical element when the counter electromotive force larger than a predetermined value is detected in the non-energized state. The optical apparatus according to claim 1 , wherein the optical apparatus is performed. 前記光学機器は、表示手段および音発生手段の少なくとも一方を有し、
前記制御手段は、前記非通電状態において前記逆起電力を検出した場合に、前記表示手段および音発生手段の少なくとも一方を作動させて警告することを特徴とする請求項1又は2に記載の光学機器。
The optical apparatus has at least one of display means and sound generation means,
3. The optical device according to claim 1, wherein when the back electromotive force is detected in the non-energized state, the control unit operates and warns at least one of the display unit and the sound generation unit. machine.
光学素子と、前記光学素子を駆動するステッピングモータと、前記ステッピングモータへの通電を制御する制御手段と、前記ステッピングモータの励磁コイルにおいて発生する逆起電力を検出する検出手段と、前記ステッピングモータが非通電状態になる前の最後の励磁状態を記憶する記憶手段とを有し、
前記制御手段は、前記ステッピングモータの非通電状態において、前記検出手段により所定値より小さい前記逆起電力を検出した場合に前記ステッピングモータを前記記憶された励磁状態とするための前記ステッピングモータへの通電を行い、前記所定値より大きい前記逆起電力を検出した場合に前記光学素子を該光学素子の位置制御上の基準位置に移動させるように前記ステッピングモータへの通電を行うことを特徴とする光学機器。
An optical element; a stepping motor that drives the optical element; a control unit that controls energization of the stepping motor; a detection unit that detects a counter electromotive force generated in an excitation coil of the stepping motor; and the stepping motor Storage means for storing the last excitation state before the non-energized state,
Wherein, the in the non-energized state of the stepping motor, when it is detected a predetermined value smaller than the back electromotive force by said detecting means to said stepping motor for the excitation state of said stored said stepping motor performs energization, characterized in that the energization of the stepping motor to move the optical element to a reference position on the position control of the optical element when detecting the predetermined value greater than the back EMF Optical equipment.
前記ステッピングモータにより回転されるネジ軸と、前記ネジ軸に係合し、前記ネジ軸の回転により前記光学素子を駆動するラック部材とを有することを特徴とする請求項1からのいずれか1つに記載の光学機器。 A screw shaft which is rotated by the stepping motor, engages the threaded shaft, any one of claims 1 to 4, characterized in that it comprises a rack member for driving the optical element by rotation of the threaded shaft Optical equipment described in one. 前記検出手段は、前記ステッピングモータの各相の励磁コイルからの逆起電圧信号の絶対値を示す信号を出力する第1の回路と、前記第1の回路からの前記各相の出力を加算する第2の回路と、前記第2の回路の出力を2値化する第3の回路とにより構成されていることを特徴とする請求項1からのいずれか1つに記載の光学機器。 The detection means adds a first circuit that outputs a signal indicating an absolute value of a back electromotive voltage signal from each phase excitation coil of the stepping motor, and an output of each phase from the first circuit. third optical device according to claim 1, any one of the 5, characterized in that it is constituted by a circuit for binarizing the second circuit, the output of the second circuit. 前記検出手段は、前記第2の回路の出力レベルに応じた信号を出力するレベル判定回路をさらに有することを特徴とする請求項に記載の光学機器。 The optical apparatus according to claim 6 , wherein the detection unit further includes a level determination circuit that outputs a signal corresponding to an output level of the second circuit.
JP2005231800A 2005-08-10 2005-08-10 Optical equipment using stepping motor Pending JP2007047449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005231800A JP2007047449A (en) 2005-08-10 2005-08-10 Optical equipment using stepping motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005231800A JP2007047449A (en) 2005-08-10 2005-08-10 Optical equipment using stepping motor

Publications (2)

Publication Number Publication Date
JP2007047449A JP2007047449A (en) 2007-02-22
JP2007047449A5 true JP2007047449A5 (en) 2008-09-18

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Family Applications (1)

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JP2005231800A Pending JP2007047449A (en) 2005-08-10 2005-08-10 Optical equipment using stepping motor

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5419360B2 (en) * 2008-01-28 2014-02-19 キヤノン株式会社 Optical equipment
CN103080804B (en) * 2011-03-29 2016-03-02 松下电器产业株式会社 Lens changeable, camera body and digital camera
JP2013236431A (en) * 2012-05-08 2013-11-21 Mitsubishi Electric Corp Control method and control apparatus for brushless motor
JP5837547B2 (en) * 2013-10-28 2015-12-24 リンナイ株式会社 Abnormality detection device for circuit system of stepping motor
JP5935784B2 (en) * 2013-11-14 2016-06-15 株式会社デンソー Motor control device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0471397A (en) * 1990-07-10 1992-03-05 Matsushita Electric Ind Co Ltd Step motor driver
JPH08112481A (en) * 1994-10-18 1996-05-07 Janome Sewing Mach Co Ltd Sewing machine
JPH09106314A (en) * 1995-10-11 1997-04-22 Canon Inc Driving device and optical instrument using the same
JP3333153B2 (en) * 1998-09-04 2002-10-07 オリンパス光学工業株式会社 Lens device and electronic camera using the same
US6861817B2 (en) * 2001-12-21 2005-03-01 Freescale Semiconductor, Inc. Method and apparatus for detecting a stall condition in a stepping motor
JP2004347890A (en) * 2003-05-22 2004-12-09 Sankyo Seiki Mfg Co Ltd Lens driving device, thin camera and cellular phone with camera

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