CA1291516C - Method for winding coils of single-phase induction electromotor - Google Patents
Method for winding coils of single-phase induction electromotorInfo
- Publication number
- CA1291516C CA1291516C CA000555269A CA555269A CA1291516C CA 1291516 C CA1291516 C CA 1291516C CA 000555269 A CA000555269 A CA 000555269A CA 555269 A CA555269 A CA 555269A CA 1291516 C CA1291516 C CA 1291516C
- Authority
- CA
- Canada
- Prior art keywords
- winding
- starting
- slots
- coil
- electromotor
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Induction Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A method for winding stator coils of a single phase induction electromotor comprising winding a starting coil, avoiding winding of the starting coil about selected slots, moving an outer coil pitch to form coil overlapping slots adjacent to the selected unused slots for eliminating unused teeth, whereby the starting coil overlaps the starting coil in the selected slots disposed in a starting winding with a 90° electric angle for increasing the starting torque and promoting the operation efficiency of the electromotor.
A method for winding stator coils of a single phase induction electromotor comprising winding a starting coil, avoiding winding of the starting coil about selected slots, moving an outer coil pitch to form coil overlapping slots adjacent to the selected unused slots for eliminating unused teeth, whereby the starting coil overlaps the starting coil in the selected slots disposed in a starting winding with a 90° electric angle for increasing the starting torque and promoting the operation efficiency of the electromotor.
Description
~29~
METHOD FOR WINDING COILS OF SINGE-PHASE IN WCTION ELECTRoMcroR
FIELD OF THE I~VENIION
The present invention reLates to a method for winding coi.ls of single-phase induction electromotor and, in particular, to a method for wi.nding coils of single-phase induction electromotor designed to promote operation efficicency and to improve starting torque by producing~no unavailable teeth between starting winding slots, while keeping an electric angle which starting winding forms with main winding at 90.
DESCRIPTION OF THE PRIOR ART
Generally, in the case of single-phase 4-polar induction electromotor, 4 unavailable teeth t~hich are not included in any pole are existent between po].es adjacent to the main winding slot or between poles adjacent to starting wi.nding slot and, in the case of main winding, magnetic flux - produced from these unavailable teeth during operati.on does not rotate the rotor of electromotor but exercises a damping action on:it due to counter electromotive force.
Consequently, in the pri.or si.ngle-phase induction electromotor, in order to remove such unavai.lable teeth between poles adjacent to the main windi.ng slot, an adjacent pole and its outer coil lcop are wound in the same 910t by one-slot expansion of coil pitch and by expansion of each coil loo~ of each pole.~
Although it is the best way to wind a coil in the same manner as i.n the main winding i.n order to remove unavailable teeth i.n the starting winding, an electric angle which starting winding forms with main winding cannot maintain 90 in the case of single-phase 4-polar induction .,.' ~
~2~
electromotor. So there is no other way but to wind a coil in the starting winding so that unavailable teeth may exist between respective adjacent poles.
Accordingly, such an induction electromotor is defective because the entire operation efficiency will-drop by the decline of its starting torque.
However, the present invention is designed in consideration of such prior defects as described hereinabove. It maintains an electric ~o angle between main winding and starting winding at 90 by one-slot expansion of only outer coil pitch of coil which forms each pole of starting winding, and produces no unavailable teeth between poles adjacent to starting winding. It is designed not to weaken the starting torque because magnetic flux produced from such unavailable teeth exercises 1~ a damping action.
BRIEF DESCRIPTION OF THE DRAWINGS
When a detailed explanation is given to it according to the drawings attached hereto, it comes as follows:
FIGURE 1 is a schematic diagram of single-phase ~polar induction electromotor showing a coils wound under the prior art;
FIGURE 2 is a schematic diagram showing that a coil is wound under the present invention;
FIGURE 3 is a development diagram showing the stator slots of the present invention; and :
FIGURE 4 and 5 are di.agratns showing a simple comparison drawn between prior art and the present inventicn, respectively.
An eYample of such maln winding is illustrated in Figure 1 In the case of single-phase 4-polar 36-slot induction electromotor, each coil pitch of coil Cl spans 1st slot to 10th slot, 2nd slot to 9th slot, 3rd slot to 8th slot and 4th slot to 7th slot and the outer coil pi.tch of coil C2 which forms an adjacent pole spans 10th slot to 19th slot. Consequently, 10th slot is joi.ntly owned by the coil Cl and the outer coil pitch of coil C2. Thus, unavailable teeth are not existent.
FIGURE 2 is a summarized diagram showing that main winding and starting wi.nding are wound through slots under the present invention.
It shows that all coil pitches of each pole are expanded by one slot so that main winding may not be provi.ded with u~available teeth between respective poles formed by the coils Cl, C2, C3 and C4.
Cn the other hand, the starti.ng wi.nding is made to maintain an electric angle whi.ch it forms with main winding at 90 wi.th~lt changing the center of each pole formed by the coils T5, T6, T7 and T8, but outer coil pitch slots, for example, 6th slot, 15th slot, 24th slot and 33rd slot, are made to be owned jointly by the adjacent poles wi.thout unavailable teeth between adjacent poles by one-slot e~pansion of only outer coil pitch of each coi.l T5-T8. Accordingly, pole center of itmer coil pitch of each pole of starting winding is coincident with the pole center of starting wi.nding, but the pole center of outer coil pitch is offset by 5(in the case of 36 slots).
Such a single-phase i.nduction electromotor as designed under the r'.
...... . .
~2~
present invention removes unavailable teeth by one-slot expansion of orly outer coil pi.tch of each pole and improves starting torque, thereby promoting the entire operation efficiency thereof_ Such a single-phase induction electromotor as descrihed hereiinabove has an advantage in improving the factor and efficiency of electromotor which decline by the use of working condenser whose starting torque is low in the case of single-phase induction electromotor under the prior art and reduces a copper loss as coi.l loop becomes relatively shorter when compared with expansion of all inner and outer coil pitches of each starting winding simply to improve starting torque.
METHOD FOR WINDING COILS OF SINGE-PHASE IN WCTION ELECTRoMcroR
FIELD OF THE I~VENIION
The present invention reLates to a method for winding coi.ls of single-phase induction electromotor and, in particular, to a method for wi.nding coils of single-phase induction electromotor designed to promote operation efficicency and to improve starting torque by producing~no unavailable teeth between starting winding slots, while keeping an electric angle which starting winding forms with main winding at 90.
DESCRIPTION OF THE PRIOR ART
Generally, in the case of single-phase 4-polar induction electromotor, 4 unavailable teeth t~hich are not included in any pole are existent between po].es adjacent to the main winding slot or between poles adjacent to starting wi.nding slot and, in the case of main winding, magnetic flux - produced from these unavailable teeth during operati.on does not rotate the rotor of electromotor but exercises a damping action on:it due to counter electromotive force.
Consequently, in the pri.or si.ngle-phase induction electromotor, in order to remove such unavai.lable teeth between poles adjacent to the main windi.ng slot, an adjacent pole and its outer coil lcop are wound in the same 910t by one-slot expansion of coil pitch and by expansion of each coil loo~ of each pole.~
Although it is the best way to wind a coil in the same manner as i.n the main winding i.n order to remove unavailable teeth i.n the starting winding, an electric angle which starting winding forms with main winding cannot maintain 90 in the case of single-phase 4-polar induction .,.' ~
~2~
electromotor. So there is no other way but to wind a coil in the starting winding so that unavailable teeth may exist between respective adjacent poles.
Accordingly, such an induction electromotor is defective because the entire operation efficiency will-drop by the decline of its starting torque.
However, the present invention is designed in consideration of such prior defects as described hereinabove. It maintains an electric ~o angle between main winding and starting winding at 90 by one-slot expansion of only outer coil pitch of coil which forms each pole of starting winding, and produces no unavailable teeth between poles adjacent to starting winding. It is designed not to weaken the starting torque because magnetic flux produced from such unavailable teeth exercises 1~ a damping action.
BRIEF DESCRIPTION OF THE DRAWINGS
When a detailed explanation is given to it according to the drawings attached hereto, it comes as follows:
FIGURE 1 is a schematic diagram of single-phase ~polar induction electromotor showing a coils wound under the prior art;
FIGURE 2 is a schematic diagram showing that a coil is wound under the present invention;
FIGURE 3 is a development diagram showing the stator slots of the present invention; and :
FIGURE 4 and 5 are di.agratns showing a simple comparison drawn between prior art and the present inventicn, respectively.
An eYample of such maln winding is illustrated in Figure 1 In the case of single-phase 4-polar 36-slot induction electromotor, each coil pitch of coil Cl spans 1st slot to 10th slot, 2nd slot to 9th slot, 3rd slot to 8th slot and 4th slot to 7th slot and the outer coil pi.tch of coil C2 which forms an adjacent pole spans 10th slot to 19th slot. Consequently, 10th slot is joi.ntly owned by the coil Cl and the outer coil pitch of coil C2. Thus, unavailable teeth are not existent.
FIGURE 2 is a summarized diagram showing that main winding and starting wi.nding are wound through slots under the present invention.
It shows that all coil pitches of each pole are expanded by one slot so that main winding may not be provi.ded with u~available teeth between respective poles formed by the coils Cl, C2, C3 and C4.
Cn the other hand, the starti.ng wi.nding is made to maintain an electric angle whi.ch it forms with main winding at 90 wi.th~lt changing the center of each pole formed by the coils T5, T6, T7 and T8, but outer coil pitch slots, for example, 6th slot, 15th slot, 24th slot and 33rd slot, are made to be owned jointly by the adjacent poles wi.thout unavailable teeth between adjacent poles by one-slot e~pansion of only outer coil pitch of each coi.l T5-T8. Accordingly, pole center of itmer coil pitch of each pole of starting winding is coincident with the pole center of starting wi.nding, but the pole center of outer coil pitch is offset by 5(in the case of 36 slots).
Such a single-phase i.nduction electromotor as designed under the r'.
...... . .
~2~
present invention removes unavailable teeth by one-slot expansion of orly outer coil pi.tch of each pole and improves starting torque, thereby promoting the entire operation efficiency thereof_ Such a single-phase induction electromotor as descrihed hereiinabove has an advantage in improving the factor and efficiency of electromotor which decline by the use of working condenser whose starting torque is low in the case of single-phase induction electromotor under the prior art and reduces a copper loss as coi.l loop becomes relatively shorter when compared with expansion of all inner and outer coil pitches of each starting winding simply to improve starting torque.
Claims
1. A method for winding stator coils of a single phase 4 pole 36-slot induction electromotor comprising:
winding a starting coil through slots of said electromotor for forming a starting winding, avoiding winding of said starting coil about selected slots, said selected slots being unused slots, moving an outer coil pitch to form coil overlapping slots adjacent to said selected unused slots for eliminating unused teeth between said unused slots and said coil overlapping slots, and winding a main coil through slots for forming a main winding whereby the starting coil overlaps the starting coil in said selected slots, a 90° electric angle being formed between said main winding and said starting winding, and four slots being unused by the starting winding for effectively increasing the starting torque and promoting the operation efficiency of the electromotor.
winding a starting coil through slots of said electromotor for forming a starting winding, avoiding winding of said starting coil about selected slots, said selected slots being unused slots, moving an outer coil pitch to form coil overlapping slots adjacent to said selected unused slots for eliminating unused teeth between said unused slots and said coil overlapping slots, and winding a main coil through slots for forming a main winding whereby the starting coil overlaps the starting coil in said selected slots, a 90° electric angle being formed between said main winding and said starting winding, and four slots being unused by the starting winding for effectively increasing the starting torque and promoting the operation efficiency of the electromotor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR11610/86 | 1986-12-30 | ||
| KR1019860011610A KR890003300B1 (en) | 1986-12-30 | 1986-12-30 | Induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1291516C true CA1291516C (en) | 1991-10-29 |
Family
ID=19254610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000555269A Expired - Lifetime CA1291516C (en) | 1986-12-30 | 1987-12-23 | Method for winding coils of single-phase induction electromotor |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR890003300B1 (en) |
| AU (1) | AU600780B2 (en) |
| CA (1) | CA1291516C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2433353A1 (en) * | 2009-05-22 | 2012-03-28 | Arçelik Anonim Sirketi | Arrangement for starting a single phase induction motor |
| CN104218746B (en) * | 2014-09-04 | 2016-08-24 | 广西师范大学 | Three-phase symmetrical prints the manufacture method of winding |
| KR102629498B1 (en) * | 2022-08-24 | 2024-01-25 | 엘지전자 주식회사 | Single-phase induction motor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3169929D1 (en) * | 1980-01-10 | 1985-05-23 | Pittman Corp | Coil and coil former for brushless and ironless armature motors |
| JPS622834A (en) * | 1985-06-14 | 1987-01-08 | Odawara Eng:Kk | Coil winding method and device therefor |
-
1986
- 1986-12-30 KR KR1019860011610A patent/KR890003300B1/en not_active IP Right Cessation
-
1987
- 1987-12-23 CA CA000555269A patent/CA1291516C/en not_active Expired - Lifetime
- 1987-12-29 AU AU83087/87A patent/AU600780B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU600780B2 (en) | 1990-08-23 |
| KR890003300B1 (en) | 1989-09-06 |
| AU8308787A (en) | 1989-06-29 |
| KR880008491A (en) | 1988-08-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |