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EP0449538A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Dynamo electric machine

Assignee: ZF International UK Ltd
•
Filing: 1991-03-22
•
Granted: —
•
Expires: 2011-03-22
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Abstract

Abstract A dynamo electric machine comprises a permanent magnet rotor (16) rotatable within a wound stator (14), characterized in that the rotor (16) comprises a ferromagnetic body (18) supporting n permanent magnets (17) equi-angularly spaced around the rotational axis of the ferromagnetic body (18), the wound stator (14) comprising an annular ferromagnetic body (19) having 1.5 n axially extending slots (21) defining radially inwardly extending poles (22) each pole (22) being encircled by a respective stator winding (24), the windings (24) encircling the first, fourth, seventh, ...... , n - 2 th poles (22) being electrically interconnected in series and defining the first phase of the machine, the windings (24) of the second, fifth, eight, ...... , n - 1 th poles (22) being electrically interconnected in series and defining the second phase of the machine, and the windings (24) of the third, sixth, ninth, ...... , n th poles (22) being electrically interconnected in series and defining the third phase of the machine.

Inventors

  • 👤 Farid Bahij Dr. Chaaban
  • 👤 Terrence Stanley Dr. Birch
  • 👤 David Prof. Howe

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 12:19
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2706; H02K1/272; H02K1/274; H02K1/2753; H02K1/276; H02K1/2766; H02K1/2773; H02K21/00; H02K21/12; H02K21/14; H02K21/16; H02K7/00; H02K7/18; H02K7/1807; H02K7/1846

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 213 words
A dynamo electric machine comprising a cylindrical permanent magnet rotor rotatable within a wound stator, the machine being characterized in that the rotor comprises a ferromagnetic body supporting n permanent magnets each of which has its polar axis parallel to the thickness of the magnet and each of which is disposed in the ferromagnetic body of the rotor equi-angularly spaced around the rotational axis of the rotor with its length and width extending axially and radially of the ferromagnetic body respectively, and its polar axis extending generally circumferentially, the wound stator comprising an annular ferromagnetic body having 1.5 n axially extending slots defining 1.5 n radially inwardly extending poles, and, each radially extending pole being encircled by a respective stator winding, the windings encircling the first, fourth, seventh, ...... , n - 2 th poles (22) being electrically interconnected in series and defining the first phase winding of the dynamo electric machine, the windings (24) encircling the second, fifth, eighth, ...... , and n - 1 th poles (22) being electrically interconnected in series and defining the second phase winding of the machine, and, the windings (24) encircling the third, sixth, ninth, ...... , and n th poles (22) being electrically interconnected in series and defining the third phase winding of the machine.
Claim 2
Dependent Claim 22 words
A dynamo electric machine as claimed in Claim 1 characterized in that the ferromagnetic body (18) of the rotor (16) is laminated.
Claim 3
Dependent Claim 27 words
A dynamo electric machine as claimed in Claim 1 or Claim 2 characterized in that the permanent magnets (17) are made from a ferrite permanent magnet material.
Claim 4
Dependent Claim 35 words
A dynamo electric machine as claimed in any one of the preceding claims characterized in that the permanent magnets (17) are disposed within axial passages provided in the ferromagnetic body (18) of the rotor (16).
Claim 5
Dependent Claim 26 words
A dynamo electric machine as claimed in Claim 4 characterized in that said passages open radially of the rotor onto the air gap of the machine.

References Cited (Backward Citations)

EP0295718A2 Cited
FR2636480A1 Cited

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