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
- Authority
- JP
- Japan
- Prior art keywords
- stepping motor
- optical element
- optical
- circuit
- electromotive force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 230000003287 optical Effects 0.000 claims 18
- 230000001429 stepping Effects 0.000 claims 18
- 230000005284 excitation Effects 0.000 claims 7
- 238000001514 detection method Methods 0.000 claims 4
- 230000000875 corresponding Effects 0.000 claims 1
Claims (7)
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.
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は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は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.
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 |
Family
ID=37850322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005231800A Pending JP2007047449A (en) | 2005-08-10 | 2005-08-10 | Optical equipment using stepping motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2007047449A (en) |
Families Citing this family (5)
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)
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 |
-
2005
- 2005-08-10 JP JP2005231800A patent/JP2007047449A/en active Pending
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