GB491923A - Improvements in or relating to alternating or direct current electric motors - Google Patents

Improvements in or relating to alternating or direct current electric motors

Info

Publication number
GB491923A
GB491923A GB6915/37A GB691537A GB491923A GB 491923 A GB491923 A GB 491923A GB 6915/37 A GB6915/37 A GB 6915/37A GB 691537 A GB691537 A GB 691537A GB 491923 A GB491923 A GB 491923A
Authority
GB
United Kingdom
Prior art keywords
stator
rotor
pole
diameter
machines
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.)
Expired
Application number
GB6915/37A
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.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
Siemens AG
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 Siemens Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Publication of GB491923A publication Critical patent/GB491923A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
    • H02K9/18—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

491,923. Motors. SIEMENS-SCHUCKERTWERKE AKT.-GES. March 9, 1937, Nos. 6915 and 6916. Convention dates, March 9, 1936 and Oct. 14, 1936. [Class 35] Cores ; cooling.-In a motor to be run for considerable periods at a substantially constant load the ratio of the output coefficient to the rotor diameter is given by curves according to Figs. 1 and 2 (not shown), the effective rotor length is between 1À3D and 2À7D, where D is the rotor diameter, and preferably between 1À6D and 2À3D: furthermore other dimensions are as follows; for a four-pole machine the stator outer diameter is between 1À5D and 1À8D, preferably between 1À65D and 1À75D and the slot depth is between À17D and À22D; for a six-pole machine the stator outer diameter is between 1À4D and 1À7D, preferably between 1À52D and 1À6D, and the stator slot depth is between À15D and À2D; for an eight-pole machine the stator outer diameter is between 1À3D and 1À5D, preferably between 1À4D and 1À45D, and the stator slot depth is between À12D and À16D; in all cases the product of the number of stator slots and the slot width is between 2D and 2À3D. The diameter of the rotor shaft, is between À56D and À43D for four-pole machines, between À5D and À4D for six-pole machines, and between À45D and À36D for eight-pole machines. The product of the rotor slot width and the number of rotor slots is between 1À45D and 1À55D for four-pole machines, between 1À48D and 1À58D for six-pole machines, and between 1À5D and 1À6D for eight-pole machines, the rotor slot depth being between À125D and À132D. The theoretical basis of these ratios is discussed in the Specification. The Figure shows an enclosed motor constructed according to the invention, and more particularly the cooling- . arrangements therefor. External air is forced by a fan 9 between cooling-channels 8 through which the internal air is forced by a fan 10 returning through the rotor slots and behind the stator. At the back of the stator are arranged guide plates 14 so that the velocity of the air increases gradually to a maximum at the middle of the stator and eddy currents are diminished.
GB6915/37A 1936-03-09 1937-03-09 Improvements in or relating to alternating or direct current electric motors Expired GB491923A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE491923X 1936-03-09

Publications (1)

Publication Number Publication Date
GB491923A true GB491923A (en) 1938-09-09

Family

ID=6544332

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6915/37A Expired GB491923A (en) 1936-03-09 1937-03-09 Improvements in or relating to alternating or direct current electric motors

Country Status (1)

Country Link
GB (1) GB491923A (en)

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