GB2252455A - Stator/rotor arrangement for a dynamo electric machine - Google Patents

Stator/rotor arrangement for a dynamo electric machine Download PDF

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Publication number
GB2252455A
GB2252455A GB9201767A GB9201767A GB2252455A GB 2252455 A GB2252455 A GB 2252455A GB 9201767 A GB9201767 A GB 9201767A GB 9201767 A GB9201767 A GB 9201767A GB 2252455 A GB2252455 A GB 2252455A
Authority
GB
United Kingdom
Prior art keywords
electromagnets
coils
axis
rotor
stator
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
GB9201767A
Other versions
GB9201767D0 (en
GB2252455B (en
Inventor
David Occardi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB9201767D0 publication Critical patent/GB9201767D0/en
Publication of GB2252455A publication Critical patent/GB2252455A/en
Application granted granted Critical
Publication of GB2252455B publication Critical patent/GB2252455B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/26—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating armatures and stationary magnets
    • H02K21/28—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating armatures and stationary magnets with armatures rotating within the magnets
    • H02K21/34—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating armatures and stationary magnets with armatures rotating within the magnets having bell-shaped or bar-shaped magnets, e.g. for cycle lighting
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/40—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the arrangement of the magnet circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K25/00—DC interrupter motors or generators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

Electrical apparatus has two parallel stator magnets 11, 12 providing two pairs of like poles and the rotor has two electromagnets 15, 16 on opposite sides of a plane containing rotor axis 14 between and transverse to the stator magnets. The coils of magnets 15, 16 are in series and are wound to produce unlike poles nearer the axis 14. C D are electrical input or output points. The stator magnet be substituted by electro-magnets. The rotor may have a number of axially spaced pairs of electromagnetic coils (Fig. 3 not shown). <IMAGE>

Description

IKPROvsssslS IN OR RELATING TO H1ECTRlCAL APPARATUS This invention relates to electrical apparatus.
According to this invention electrical apparatus comprises a stator magnet assembly providing two spaced pairs of poles, the poles in each pair being of like polarity, and a rotor assembly rotatable about an axis between and transverse to the stator assembly, the rotor assembly comprising two electromagnets respectively on opposite sides of a plane containing the rotor axis, the coils of the electromagnets being in series and substantially coaxial, the electromagnets being arranged when energized to have magnetic poles of opposite polarity nearer the axis.
The rotor assembly may comprise a plurality of axially spaced axially aligned pairs of said two electromagnets, with the coils on said one side being in series and the coils on the other side being in series and the coils on the one side together being in series with the coils on the other side together.
The stator assembly may comprise two parallel permanent magnets at right angles to the axis, the rotor electromagnets being within the axial extent of the permanent magnets.
The permanent magnets may be replaced by electromagnets.
The invention may be performed in various ways and one specific embodiment with possible modifications will now be described by way of example with reference to the accompanying drawings, in which: Fig. 1 is a plan view of electrical apparatus; Fig. 2 is a side view of Fig. 1 with part omitted; and Fig. 3 is a side view of a modification.
The electrical apparatus 10 comprises two stator permanent magnets 11, 12 which are parallel and with like poles nearest each other so as to provide two pairs of spaced poles, the poles in each pair being of like polarity. Between the stator magnets is a rotor assembly 13 which can rotate about axis 14 which is midway between the centre points of the magnets 11, 12 and at right angles to them.
The rotor assembly comprises structure mounting two confronting electromagnets 15, 16 respectively on opposite sides of a plane containing the axis 14 and respectively comprising coils 15a, 16a wound on armatures 16b, 16b. As shown the coils 15a, 16a are coaxial and confined within the axial extent of the magnets 11, 12. The coils are wound so that they are in the same sense (i.e. both clockwise or both anti-clockwise) as seen in the direction of arrow A (Fig. 1), so that the coils provide magnetic poles of unlike polarity nearer the axis 14. The coils are connected in series as shown.
The inner end of coil 1Sa and the inner end of coil 16a are connected to a slip ring or commutator.
Thus when a current flows through the coils in a direction from C to D or D to C the electromagnets produce unlike poles facing each other at the inner ends of the magnets 15, 16.
As seen in Fig. 2 the electromagnets and stator magnets are coplanar.
Either the apparatus is used as a motor, in which case electric voltage is applied at points C, D to cause the rotor assembly to rotate about axis 14; or the apparatus is operated as an electric generator in which case a motor rotates the rotor assembly about axis 14 and electric current can be drawn from points ,D.
There (ig. 3) may be a plurality of axially spaced axially aligned such pairs of electromagnets in the rotor assembly, with all the coils 1Sa on the same side of the plane containing the axis and all the coils 16a on the other side.
The set of coils 1Sa are in series with each other and the set of coils 16a are in series with each other, the set of coils la being in series with the set of coils 16a. All the coils are confined within the axial extent of the stator magnets.
The permanent magnets 11, 12 may be replaced by electromagnets.

Claims (5)

CIAIMS
1. Electrical apparatus comprising a stator magnet assembly providing two spaced pairs of poles, the poles in each pair being of like polarity, and a rotor assembly rotatable about an axis between and transverse to the stator assembly, the rotor assembly comprising two electromagnets respectively on opposite sides of a plane containing the rotor axis, the coils of the electromagnets being in series and substantially coaxial, the electromagnets being arranged when energized to have magnetic poles of opposite polarity nearer the axis.
2. Electrical apparatus as claimed in claim 1, in which the rotor assembly comprises a plurality of axially spaced axially aligned pairs of said two electromagnets, with the coils on said one side being in series and the coils on the other side being in series and the coils on the one side together being in series with the coils on the other side together.
3. Electrical apparatus as claimed in claim 1 or claim 2, in which the stator assembly comprises two parallel permanent magnets at right angles to the axis, the rotor electromagnets being within the axial extent of the permanent magnets.
4. Electrical apparatus as claimed in claim 1 or claim 2, in which the stator assembly comprise two electromagnets at right angles to the axis, the rotor electromagnets being within the axial extent of the permanent magnets.
5. Electrical apparatus substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
GB9201767A 1991-01-29 1992-01-28 Improvements in or relating to electrical apparatus having stator and rotor assemblies Expired - Fee Related GB2252455B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB919101857A GB9101857D0 (en) 1991-01-29 1991-01-29 Improvements in or relating to electrical apparatus

Publications (3)

Publication Number Publication Date
GB9201767D0 GB9201767D0 (en) 1992-03-11
GB2252455A true GB2252455A (en) 1992-08-05
GB2252455B GB2252455B (en) 1994-11-09

Family

ID=10689142

Family Applications (2)

Application Number Title Priority Date Filing Date
GB919101857A Pending GB9101857D0 (en) 1991-01-29 1991-01-29 Improvements in or relating to electrical apparatus
GB9201767A Expired - Fee Related GB2252455B (en) 1991-01-29 1992-01-28 Improvements in or relating to electrical apparatus having stator and rotor assemblies

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB919101857A Pending GB9101857D0 (en) 1991-01-29 1991-01-29 Improvements in or relating to electrical apparatus

Country Status (1)

Country Link
GB (2) GB9101857D0 (en)

Also Published As

Publication number Publication date
GB9201767D0 (en) 1992-03-11
GB2252455B (en) 1994-11-09
GB9101857D0 (en) 1991-03-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020128