EP0054255A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Similified connections to control speed relating to electrical rotating machinery
Assignee: Card O Matic Pty Ltd
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Filing: 1981-12-09
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Granted: —
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Expires: 2001-12-09
Abstract
Abstract The present invention discloses AC electrodynamic machines, such as electric motors, which are able to be operated in either a high speed mode or a low speed mode by not energising one (7) of the windings (6, 7, 8, 9) of the machine or by energising the one winding (7) so as to induce a magnetic pole of reverse polarity to that conventionally induced, respectively. Methods of operating AC electrodynamic machines are also disclosed.
Inventors
- 👤 Louis Stanley
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 12:24
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/04; H02K17/06; H02K99/00; H02K99/20
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
92 words
An AC electrodynamic machine having a plurality of pairs of windings (6,8 ; 7,9); each winding, when energised, inducing a magnetic pole; and adjacent windings (8, 9) being arranged to induce magentic poles of opposite polarity, wherein said machine is operable in a first, high speed, mode with one of said windings (7) unenergised, and wherein said one winding (7) is arranged to be energised to induce a magnetic pole of the same polarity as its adjacent winding ( 6 , 8) to operate said machine in a second, low speed, mode.
Claim 2
Dependent Claim
92 words
An AC electrodynamic machine having a plurality of pairs of windings (6,8 ; 7,9); each winding, when energised, inducing a magnetic pole; and adjacent windings (8, 9) being arranged to induce magentic poles of opposite polarity, wherein said machine is operable in a first, high speed, mode with one of said windings (7) unenergised, and wherein said one winding (7) is arranged to be energised to induce a magnetic pole of the same polarity as its adjacent winding ( 6 , 8) to operate said machine in a second, low speed, mode.
Claim 3
Dependent Claim
32 words
A machine as claimed in Claim 1 having four or more windings (22 - 27) wherein a further winding (26),. adjacent said one winding (27) is unenergised in said high speed mode.
Claim 4
Dependent Claim
44 words
A machine as claimed in Claim 2 wherein said further winding (52) is arranged to be energised to induce a magnetic pole of reverse polarity as said induced pole of said one winding (53) to operate said machine in a further low speed mode.
Claim 5
Dependent Claim
35 words
A machine as claimed in Claim 2 wherein said further winding (52) is arranged to be energised to induce a magnetic pole of the same polarity as said induced pole of said one winding (53).
Claim 6
Dependent Claim
18 words
A machine as claimed in any one of Claims 1 to 4 wherein said windings are distributed windings.
Claim 7
Dependent Claim
23 words
A machine as claimed in any one of claims 1 to 3 wherein said windings are wound on salient poles (2-5 ; 16-21).
Claim 8
Dependent Claim
17 words
A machine as claimed in any one of Claims 1 to 6 comprising an AC electric motor.
Claim 9
Dependent Claim
38 words
A machine as claimed in Claim 7 selected from the class consisting of synchronous motors and induction motors including capacitor start induction motors, shaded pole induction motors, split phase induction motors, and capacitor start and run induction motors.
Claim 10
Dependent Claim
41 words
A machine as claimed in any one of claims 1 to 4 having shaded poles (2, 4) and switch means (52) to short circuit either one of two shading windings (11, 12) located one to each side of each pole (2).
Claim 11
Independent Claim
99 words
A method of operating an AC electrodynamic machine having a plurality of pairs of windings (6,8 ; 7,9); each winding (6-9), when energised, inducing a magnetic pole, said method comprising the steps of operating said machine in a first, high speed, mode by leaving one winding (7) unenergised and energising the remainder of said windings (6, 8, 9) to induce magnetic poles of opposite polarity by adjacent windings; and operating said machine in a second, low speed mode by energising said one winding (7) to induce a magnetic pole of the same polarity as its adjacent winding (6, 8).
Claim 12
Independent Claim
99 words
A method of operating an AC electrodynamic machine having a plurality of pairs of windings (6,8 ; 7,9); each winding (6-9), when energised, inducing a magnetic pole, said method comprising the steps of operating said machine in a first, high speed, mode by leaving one winding (7) unenergised and energising the remainder of said windings (6, 8, 9) to induce magnetic poles of opposite polarity by adjacent windings; and operating said machine in a second, low speed mode by energising said one winding (7) to induce a magnetic pole of the same polarity as its adjacent winding (6, 8).
Claim 13
Dependent Claim
33 words
A method as claimed in Claim 10 wherein said machine has four or more windings (22-27) and a further winding (26), adjacent said one winding (26) is unenergised in said high speed mode.
Claim 14
Dependent Claim
40 words
A method as claimed in Claim 11 wherein said machine is operated at a further low speed mode by energising said further winding (52) to induce a magnetic pole of reverse polarity to that induced by said one winding (53).
Claim 15
Dependent Claim
30 words
A method as claimed in Claim 11 wherein said further winding (52) is energised to induce a magnetic pole of the same polarity as that induced by said one winding.
Claim 16
Independent Claim
20 words
A method as claimed in any one of claims 10 to 13 wherein said machine is an AC electric motor.
Claim 17
Dependent Claim
15 words
An AC electrodynamic machine substantially as described with reference to any one of the drawings.
Claim 18
Dependent Claim
15 words
An AC electrodynamic machine substantially as described with reference to any one of the drawings.
Claim 19
Independent Claim
19 words
A method of operating an AC electrodynamic machine said method being substantially as described with reference to the drawings.
Claim 20
Independent Claim
19 words
A method of operating an AC electrodynamic machine said method being substantially as described with reference to the drawings.
References Cited (Backward Citations)
No citation records indexed.
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