JPS57189551A - Dc motor - Google Patents

Dc motor

Info

Publication number
JPS57189551A
JPS57189551A JP7231081A JP7231081A JPS57189551A JP S57189551 A JPS57189551 A JP S57189551A JP 7231081 A JP7231081 A JP 7231081A JP 7231081 A JP7231081 A JP 7231081A JP S57189551 A JPS57189551 A JP S57189551A
Authority
JP
Japan
Prior art keywords
rotor
motor
coils
poles
rotation
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
JP7231081A
Other languages
Japanese (ja)
Inventor
Isao Fukushima
Hideo Nishijima
Yasunori Kobori
Teizou Tamura
Shinji Okada
Seiichi Narishima
Shinya Ichimura
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 JP7231081A priority Critical patent/JPS57189551A/en
Publication of JPS57189551A publication Critical patent/JPS57189551A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc Machiner (AREA)

Abstract

PURPOSE:To reduce th torque ripple of a DC motor at the time of operating the motor by forming recesses on the surfaces of respective poles of a rotor magnet magnetized in multiple poles and equalizing a change in the magnetic flux upon rotation of the motor. CONSTITUTION:In a motor in which a magnet rotor 1 magnetized in multiple poles is allowed to confront a plurality of a coils 2-4 sequentially energized in response to the rotating angle of the rotor 1, recesses 20 are formed on the surfaces of respective poles of the rotor 1 corresponding to the energizing periods of the respective coils 2-4, and the length of the air gap of a closed magnetic path is varied from a yoke 7. In this manner, since the variation 13 in the magnetic flux produced upon rotation of the rotor is uniform at the energized part of the coils, the produced torques become constant, thereby preventing the torque ripple.
JP7231081A 1981-05-15 1981-05-15 Dc motor Pending JPS57189551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7231081A JPS57189551A (en) 1981-05-15 1981-05-15 Dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7231081A JPS57189551A (en) 1981-05-15 1981-05-15 Dc motor

Publications (1)

Publication Number Publication Date
JPS57189551A true JPS57189551A (en) 1982-11-20

Family

ID=13485563

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7231081A Pending JPS57189551A (en) 1981-05-15 1981-05-15 Dc motor

Country Status (1)

Country Link
JP (1) JPS57189551A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110316288A1 (en) * 2010-06-25 2011-12-29 Mohammad Kimiabeigi Generator, in particular for a wind turbine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49112112A (en) * 1973-02-28 1974-10-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49112112A (en) * 1973-02-28 1974-10-25

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110316288A1 (en) * 2010-06-25 2011-12-29 Mohammad Kimiabeigi Generator, in particular for a wind turbine
US9496760B2 (en) * 2010-06-25 2016-11-15 Siemens Aktiengesellschaft Generator, in particular for a wind turbine

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