JPS56157235A - Magnetic shield cover - Google Patents

Magnetic shield cover

Info

Publication number
JPS56157235A
JPS56157235A JP6062680A JP6062680A JPS56157235A JP S56157235 A JPS56157235 A JP S56157235A JP 6062680 A JP6062680 A JP 6062680A JP 6062680 A JP6062680 A JP 6062680A JP S56157235 A JPS56157235 A JP S56157235A
Authority
JP
Japan
Prior art keywords
angle
opening
magnetic shield
shield cover
psin
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
JP6062680A
Other languages
Japanese (ja)
Inventor
Saburo Kazama
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 JP6062680A priority Critical patent/JPS56157235A/en
Publication of JPS56157235A publication Critical patent/JPS56157235A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
    • H02K11/014—Shields associated with stationary parts, e.g. stator cores
    • H02K11/0141—Shields associated with casings, enclosures or brackets

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

PURPOSE:To obtain the magnetic shield cover very small in a torque ripple and large in a magnetic shield effect by a method wherein an opening angle of a notch formed on the peripheral side surface of the shield cover is made nonintegral multiples of a magnetic pole divided angle of a rotor magnet. CONSTITUTION:A notch opening 81 for inserting a printed substrate 11 is formed on the peripheral side surface of the cup-shaped magnetic shield cover 8. The opening angle psis of the opening 81 is set to (n+3/4) times the magnetic pole divided angle psin of the rotor magnet 1. Thus, a reluctance force working between the opening 81 and the rotor magnet 1 can extremely be decreased by setting the opening angle psis of the opening 81 to a value satisfying the angle of [n+(2/3-3/4)] times the magnetic pole divided angle psin, [n-(1/4-1/3)] times, (n=1, 2, 3...), or nearly similar to the angle psin. Thereby contriving the decrease of the magnetic shield effect.
JP6062680A 1980-05-09 1980-05-09 Magnetic shield cover Pending JPS56157235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6062680A JPS56157235A (en) 1980-05-09 1980-05-09 Magnetic shield cover

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6062680A JPS56157235A (en) 1980-05-09 1980-05-09 Magnetic shield cover

Publications (1)

Publication Number Publication Date
JPS56157235A true JPS56157235A (en) 1981-12-04

Family

ID=13147690

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6062680A Pending JPS56157235A (en) 1980-05-09 1980-05-09 Magnetic shield cover

Country Status (1)

Country Link
JP (1) JPS56157235A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020150779A (en) * 2019-03-15 2020-09-17 株式会社豊田中央研究所 Housing for motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020150779A (en) * 2019-03-15 2020-09-17 株式会社豊田中央研究所 Housing for motor

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