GB2279818A - Stator winding design of single-phase induction motors - Google Patents
Stator winding design of single-phase induction motors Download PDFInfo
- Publication number
- GB2279818A GB2279818A GB9312609A GB9312609A GB2279818A GB 2279818 A GB2279818 A GB 2279818A GB 9312609 A GB9312609 A GB 9312609A GB 9312609 A GB9312609 A GB 9312609A GB 2279818 A GB2279818 A GB 2279818A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- turn
- phase induction
- induction motors
- auxiliary winding
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/04—Asynchronous induction motors for single phase current
- H02K17/08—Motors with auxiliary phase obtained by externally fed auxiliary windings, e.g. capacitor motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
- H02K3/16—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots for auxiliary purposes, e.g. damping or commutating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
Abstract
In a winding for a single-phase induction motor, the product of the total number of turns multiplied by the wire area of the main winding, divided by the product of the total number of turns multiplied by the wire area of the auxiliary winding, is in the range between 0.75 and 1.333.
Description
STATOR WINDING DESIGN
OF
SINGLE-PHASE INDUCTION MOTORS
Single-phase induction motors have two stator windings. One is the main winding. The other is the auxiliary winding. They usually have different turn numbers and wire diameters. In the conventional single-phase induction motors, the product of the total turn number (Nm) multiplied by the wire area (Sm) of the main winding is much greater than the product of the total turn number (Na) multiplied by the wire area (Sa) of the auxiliary winding, i.e:
Nm*Sm > Na*Sa where
Sm = *Dm2/4 Sa =Tr*Da2/4 In this invention, Nm*Sm is nearly equal to Na*Sa.
Such stator winding design finds application in, for example, capacitor run single-phase induction motors and capacitor run and capacitor start single-phase induction motors.
The winding design has a significant effect on the performance of single-phase induction motors in particular on the efficiency and noise.
Fig.l shows a typical conventional 2-pole single-phase induction motor's stator lamination. There are twenty four slots in the stator. Slots 1,2,11,12,13,14,23 and 24 are occupied by the main winding alone. Slots 5,6,7,8,17,18,19 and 20 are occupied by the auxiliary winding alone. Slots 3,4,9,10,15,16,21 and 22 are occupied by both the main winding and auxiliary winding. The turn number of the main winding and auxiliary winding in each slot is shown in Tab.l. The wire diameter of the main winding is 0.9 mm and the wire diameter of the auxiliary winding is 0.5 mm. The total turn number of the main winding is
Table 1
Slot 1 2 3 4 5 6 No of turn 106 106 84 80 0 0 of main winding No of turn 0 0 72 76 84 84 of auxiliary winding Slot 7 8 9 10 11 12 No of turn 0 0 80 84 106 106 of main winding No of turn 84 84 76 72 0 0 of auxiliary winding Slot 13 14 15 16 17 18 No of turn 106 106 84 80 0 0 of main winding No of turn 0 0 72 76 84 84 of auxiliary winding Slot 19 20 21 22 23 24 No of turn 0 0 80 84 106 106 of main winding No of turn 84 84 76 72 0 0 of auxiliary winding Nm = (106+106+84+80)*4
= 1504
The total turn number of the auxiliary winding is
Na = (84+84+76+72)*4
= 1264
The wire area of the main winding is
Sm = *o.92/4 = 0.636 mm2
The wire area of the auxiliary winding is
Sa =tor*0.52/4 = 0.196 mm2
Therefore, the product of the total turn number multiplied by the wire area of the main winding is
Nm*Sm = 956.54 mm2 and the product of the total turn number multiplied by the wire area of the auxiliary winding is
Na*Sa = 248.18 mm2
It is obvious that Nm*Sm is much greater than Na*Sa. The ratio of Na*Sa and Nm*Sm is 0.259. In Fig.l the shaded area in slots indicates the area occupied by the auxiliary winding, it is much smaller than the not shaded area in slots occupied by the main winding.
In the new stator winding design, the stator lamination may be the same as the one in Fig.1. The turn number in each slot of the main winding remains unchanged. The wire diameter of the main winding is changed to 0.7. The auxiliary winding.has been changed both in the turn number in each slot and the wire diameter. The turn number in each slot of the new auxiliary winding is given in Table 2. The wire diameter of the new
Table 2
Slot 1 2 3 4 5 6 No of turn 106 106 84 80 0 0 of main winding No of turn 0 0 72 75 95 95 of auxiliary winding
Slot 7 8 9 10 11 12 No of turn 0 0 80 84 106 106 of main winding No of turn 95 95 75 72 0 0 of auxiliary winding Slot 13 ~ 14 15 16 17 18 No of turn 106 106 84 80 O of main winding No of turn 0 0 72 75 95 95 of auxiliary winding Slot 19 20 21 22 23 24 No of turn 0 0 80 84 106 106 of main winding No of turn 95 95 75 72 0 0 of auxiliary winding auxiliary winding is 0.74. The total turn number of the new auxiliary winding is
Na' = (95+95+75+72)*4
= 1348
The wire area of the new auxiliary winding is
Sa' =11*0.742/4 = 0.43 mm2 The product of the total turn number multiplied by the wire area of the new auxiliary winding is
Na'*Sa' = 579.75 mm2
The wire area of the new main winding is
Sm' =of*0.72/4 = 0.3848 mm2 the product of the total turn number multiplied by the wire area of the new main winding is
Nm*Sm' = 578.8 mm2
It is close to the product of Na'*Sa'.
Claims (2)
1. A winding design for single-phase induction motors, the product (Nm*Sm) of the total turn number multiplied by the wire area of the main winding is equal to the product (Na*Sa) of the total turn number multiplied by the wire area of the auxiliary winding, i.e Nm*Sm/(Na*Sa) = 1
2. A winding design for single-phase induction motors according to claim 1, wherein Nm*Sm/(Na*Sa) is not equal 1, but satisfied the following equation
0.75 < Nm*Sm/(Na*Sa) < 1.333
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9312609A GB2279818A (en) | 1993-06-18 | 1993-06-18 | Stator winding design of single-phase induction motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9312609A GB2279818A (en) | 1993-06-18 | 1993-06-18 | Stator winding design of single-phase induction motors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9312609D0 GB9312609D0 (en) | 1993-08-04 |
| GB2279818A true GB2279818A (en) | 1995-01-11 |
Family
ID=10737383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9312609A Withdrawn GB2279818A (en) | 1993-06-18 | 1993-06-18 | Stator winding design of single-phase induction motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2279818A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015022439A1 (en) * | 2013-08-14 | 2015-02-19 | Geertsen Bent | Electric machine winding with central coil |
| WO2016042470A1 (en) * | 2014-09-15 | 2016-03-24 | Faber S.P.A. | Motor for a suction assembly of an enhanced-performance extractor hood |
-
1993
- 1993-06-18 GB GB9312609A patent/GB2279818A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015022439A1 (en) * | 2013-08-14 | 2015-02-19 | Geertsen Bent | Electric machine winding with central coil |
| RU2693527C2 (en) * | 2013-08-14 | 2019-07-03 | Бент ГЕРТСЕН | Winding of the electric machine with central coil |
| WO2016042470A1 (en) * | 2014-09-15 | 2016-03-24 | Faber S.P.A. | Motor for a suction assembly of an enhanced-performance extractor hood |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9312609D0 (en) | 1993-08-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |