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JPS5517261A - Dc-electric machine - Google Patents

Dc-electric machine

Info

Publication number
JPS5517261A
JPS5517261A JP8942478A JP8942478A JPS5517261A JP S5517261 A JPS5517261 A JP S5517261A JP 8942478 A JP8942478 A JP 8942478A JP 8942478 A JP8942478 A JP 8942478A JP S5517261 A JPS5517261 A JP S5517261A
Authority
JP
Japan
Prior art keywords
magnetic flux
cross
iron loss
rotor
flux density
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.)
Granted
Application number
JP8942478A
Other languages
Japanese (ja)
Other versions
JPS5949786B2 (en
Inventor
Haruo Oharagi
Kazuo Tawara
Shoji Ibaraki
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 JP8942478A priority Critical patent/JPS5949786B2/en
Publication of JPS5517261A publication Critical patent/JPS5517261A/en
Publication of JPS5949786B2 publication Critical patent/JPS5949786B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Dc Machiner (AREA)

Abstract

PURPOSE: To reduce the iron loss of a rotor by making a magnetic flux density distribution of the rotor uniform.
CONSTITUTION: When a gap between main core 2 and rotor core 4 is g, a cross-section of magnetic flux passing of main core (eq. a cross-section perpendicular to radial direction) is S1 and a cross-section of magnetic flux passing of main core piece 2A (eq. a cross-section perpendicular to circumferential direction) is S2, g is set 0.8mm and less than 0.8mm and S2/S1 is set 16∼20%. In comparison to S1, if S2 may be too great or small, in general, the magnetic flux density is locally increased and the iron loss may be increased because it is proportional to substantially square of the magnetic flux density. This phenomenon can be found also when the gap is narrow. These relationships can be made clear by a characteristic curve as shown in the figure. As indicated in the figure, the iron loss can be reduced when g≤ 0.8mm, S2/S1=16∼20%.
COPYRIGHT: (C)1980,JPO&Japio
JP8942478A 1978-07-24 1978-07-24 dc machine Expired JPS5949786B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8942478A JPS5949786B2 (en) 1978-07-24 1978-07-24 dc machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8942478A JPS5949786B2 (en) 1978-07-24 1978-07-24 dc machine

Publications (2)

Publication Number Publication Date
JPS5517261A true JPS5517261A (en) 1980-02-06
JPS5949786B2 JPS5949786B2 (en) 1984-12-05

Family

ID=13970270

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8942478A Expired JPS5949786B2 (en) 1978-07-24 1978-07-24 dc machine

Country Status (1)

Country Link
JP (1) JPS5949786B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4500100A (en) * 1982-10-30 1985-02-19 Elring Dichtungswerke Gmbh Cylinder head gasket
US5735528A (en) * 1993-12-17 1998-04-07 Lycab Ab Self-lubricating packing piece
DE202007018448U1 (en) 2007-12-18 2008-07-24 Obshestvo S Ogranichennoi Otvetstvennostiu "Ilma" A sealing cord having a core and a cladding surrounding the core

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4500100A (en) * 1982-10-30 1985-02-19 Elring Dichtungswerke Gmbh Cylinder head gasket
US5735528A (en) * 1993-12-17 1998-04-07 Lycab Ab Self-lubricating packing piece
DE202007018448U1 (en) 2007-12-18 2008-07-24 Obshestvo S Ogranichennoi Otvetstvennostiu "Ilma" A sealing cord having a core and a cladding surrounding the core
DE102007061580A1 (en) 2007-12-18 2009-06-25 Obshestvo S Ogranichennoi Otvetstvennostiu "Ilma" Sealing cord for sealing e.g. packing box chamber, has strip wrapped in spiral form and stretched in longitudinal direction, where spiral windings partially overlap in winding direction

Also Published As

Publication number Publication date
JPS5949786B2 (en) 1984-12-05

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