JPS5313123A - Field circuit for dc motor - Google Patents

Field circuit for dc motor

Info

Publication number
JPS5313123A
JPS5313123A JP8731876A JP8731876A JPS5313123A JP S5313123 A JPS5313123 A JP S5313123A JP 8731876 A JP8731876 A JP 8731876A JP 8731876 A JP8731876 A JP 8731876A JP S5313123 A JPS5313123 A JP S5313123A
Authority
JP
Japan
Prior art keywords
field circuit
motor
field
thyristor
circuit
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
Application number
JP8731876A
Other languages
Japanese (ja)
Inventor
Kimio Kono
Gihe Obana
Kenzo Kamiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8731876A priority Critical patent/JPS5313123A/en
Publication of JPS5313123A publication Critical patent/JPS5313123A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Direct Current Motors (AREA)

Abstract

PURPOSE: To reduce power consumption by discharging transient voltage produced in field winding when field circuit is opened during power supply through thyristor.
COPYRIGHT: (C)1978,JPO&Japio
JP8731876A 1976-07-23 1976-07-23 Field circuit for dc motor Pending JPS5313123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8731876A JPS5313123A (en) 1976-07-23 1976-07-23 Field circuit for dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8731876A JPS5313123A (en) 1976-07-23 1976-07-23 Field circuit for dc motor

Publications (1)

Publication Number Publication Date
JPS5313123A true JPS5313123A (en) 1978-02-06

Family

ID=13911483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8731876A Pending JPS5313123A (en) 1976-07-23 1976-07-23 Field circuit for dc motor

Country Status (1)

Country Link
JP (1) JPS5313123A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58100238A (en) * 1981-12-10 1983-06-14 Foster Denki Kk Optical information reader
JPS6310339A (en) * 1986-07-01 1988-01-16 Nec Corp Optical pickup device
US4720825A (en) * 1984-02-06 1988-01-19 Asahi Kogaku Kogyo Kabushiki Kaisha Optical data reproducing devices having improved trick play capability
US5303216A (en) * 1991-08-28 1994-04-12 Mitsubishi Denki Kabushiki Kaisha Optical recording and reproducing apparatus for tracking wobbling guide grooves
EP0686968A2 (en) 1994-06-07 1995-12-13 Matsushita Electric Industrial Co., Ltd. Optical information recording medium, optical information recording method, and optical information reproducing apparatus
US5508992A (en) * 1993-09-29 1996-04-16 Tdk Corporation Magneto-optical recording/reproducing pickup head with a diffraction grating and a wollaston prism

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58100238A (en) * 1981-12-10 1983-06-14 Foster Denki Kk Optical information reader
US4720825A (en) * 1984-02-06 1988-01-19 Asahi Kogaku Kogyo Kabushiki Kaisha Optical data reproducing devices having improved trick play capability
JPS6310339A (en) * 1986-07-01 1988-01-16 Nec Corp Optical pickup device
JPH0610884B2 (en) * 1986-07-01 1994-02-09 日本電気株式会社 Optical pickup device
US5303216A (en) * 1991-08-28 1994-04-12 Mitsubishi Denki Kabushiki Kaisha Optical recording and reproducing apparatus for tracking wobbling guide grooves
US5383169A (en) * 1991-08-28 1995-01-17 Mitsubishi Denki Kabushiki Kaisha Optical recording and reproducing apparatus for tracking wobbling guide grooves
US5434834A (en) * 1991-08-28 1995-07-18 Mitsubishi Denki Kabushiki Kaisha Optical recording and reproducing apparatus for tracking wobbling guide grooves
US5508992A (en) * 1993-09-29 1996-04-16 Tdk Corporation Magneto-optical recording/reproducing pickup head with a diffraction grating and a wollaston prism
USRE38648E1 (en) * 1993-09-29 2004-11-09 Tdk Corporation Magneto-optical recording/reproducing pickup head with a diffraction grating and a wollaston prism
EP0686968A2 (en) 1994-06-07 1995-12-13 Matsushita Electric Industrial Co., Ltd. Optical information recording medium, optical information recording method, and optical information reproducing apparatus
US5790487A (en) * 1994-06-07 1998-08-04 Matsushita Electric Industrial Co., Ltd. Optical information recording medium, optical information recording method, and optical information reproducing apparatus utilizing the same
US5850379A (en) * 1994-06-07 1998-12-15 Matsushita Electric Industrial Co., Ltd. Optical information recording medium, optical information recording method, and optical information reproducing apparatus utilizing the same

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