CN1756043A - Single-phase capacitor motor - Google Patents
Single-phase capacitor motor Download PDFInfo
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- CN1756043A CN1756043A CN 200410051709 CN200410051709A CN1756043A CN 1756043 A CN1756043 A CN 1756043A CN 200410051709 CN200410051709 CN 200410051709 CN 200410051709 A CN200410051709 A CN 200410051709A CN 1756043 A CN1756043 A CN 1756043A
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Abstract
The invention relates to a single-phase capacity motor. Wherein, its stator has a three phase winding, two input terminals connected to the two electrodes of single-phase power source and the second input terminal via the capacitor connected to one electrode of said single-phase power source. And the invention is characterized in that: said three phase winding comprises a star winding with a star connection to said three input terminals and a triangle winding with a triangle connection to said three input terminals; the phase band of said star wind and the phase band of triangle winding are alternatively distributed in the stator groove while the electrical angle distance of central space between nearby phase band is pi/6; And the current time phase angle difference of said nearby phase bands has the same sign with the electrical angel distance of central space of phase band. Compared to the present technique, the invention can improve the coefficient of winding and weaken higher harmonic to improve the property, reduce the cost, improve the start property and reduce the electromagnetic vibration noise.
Description
Technical field
The present invention relates to a kind of single-phase condenser motor, in International Patent Classification (IPC), classification belongs to HO2K3/28.
Background technology
For overcoming the disadvantage of traditional two-phase winding single-phase condenser motor, prior art proposed the three-phase winding single-phase capacitor motor.Two input terminals that the stator of such single-phase condenser motor has three phase windings of one of star or triangle connected mode and connects single phase poaer supply two utmost points be connected wherein the 3rd input terminal of a utmost point of described single phase poaer supply through capacitor, be found in " monopole asynchronous motor and application thereof (resultant current analytical method) " (Sun Yunpeng, China Machine Press Beijing in 1987 the 1st edition).The facies tract of three phase windings is generally π/3, and the facies tract pi/2 less than two-phase winding can improve winding coefficient, can eliminate the serious triple-frequency harmonics of harm.But for three phase windings of unique star or triangle connection, the harmonic wave that is higher than three times fails effectively to eliminate, and is difficult to further improve startability and reduces electromagnetic vibration noise; And when stator dimensions is not very little and when needing to count than multiple-grooved, winding coefficient is difficult to further raising.
Summary of the invention
Technical problem to be solved by this invention is, proposes a kind of single-phase condenser motor, and it compared with prior art can further improve winding coefficient and eliminate high order harmonic component.
The technical scheme that the present invention solve the technical problem is, two input terminals that a kind of single-phase condenser motor, its stator have three phase windings and connect single phase poaer supply two utmost points be connected wherein the 3rd input terminal of a utmost point of described single phase poaer supply through capacitor; It is characterized in that: described three phase windings are access to the star winding of described three input terminals and the delta windings that triangular ground is access to described three input terminals with comprising star; The two is alternately distributed in stator slot for the facies tract of described star winding and the facies tract of delta windings, and adjacent facies tract central space electrical degree is π/6 at interval; Described adjacent facies tract current time phase angle difference and facies tract central space electrical degree be jack per line at interval, promptly is all leading or hysteresis.
This technical scheme has been introduced star and the triangle mixed winding of obtaining positive effect in threephase motor to single-phase condenser motor dexterously.Three phase windings that unique star or triangle connect are 2 π/3 or π/3 facies tracts.In contrast to this, star and triangle mixed winding are π/6 facies tracts, thereby higher winding coefficient can be arranged, especially when stator dimensions be not very little should offer than multiple-grooved the time, can obviously improve winding coefficient.The raising of winding coefficient will directly improve the efficient of motor or reduce cost.Theory and practice shows, star and triangle mixed winding can be eliminated three phase windings more formidable 5 times, 7 times, 17 times and 19 subharmonic that unique star or triangle are connected fully in threephase motor, as seen be published in " middle and small motor " article of 1978 the 5th phases " the triangle one star series and parallel connections of three phase windings ".For the more serious single-phase condenser motor of high order harmonic component influence, on the basis of adopting the serious triple-frequency harmonics of three phase windings elimination harm, adopt star and the triangle mixed winding is further eliminated 5 times, 7 times, 17 times fully and 19 subharmonic have crucial meaning, can further improve startability and reduce electromagnetic vibration noise.Three phase windings that star and triangle mixed winding are connected than unique star or triangle are Duoed one times of electromagnetic parameter variable, made things convenient for the Electromagnetic Design adjustment, the electromagnetism optimal design that helps motor, can obtain the better design effect of three-phase winding motor that is connected with unique star or triangle than traditional two-phase winding single-phase condenser motor, thereby improve performance or reduce cost.
A modular design of this technical scheme is, the stator of this single-phase condenser motor is 4 utmost points, 24 grooves and multitudinous utmost point single layer winding, and the coil side of described star winding and the coil side of delta windings respectively account for 12 grooves, and the two is alternately distributed by groove; The top of described each phase of star winding connects described three input terminals, and each line terminals of described delta windings is connected in the end of the corresponding phase of described star winding according to phase sequence.At rated operation point, described adjacent facies tract current time phase angle difference equates at interval with facies tract central space electrical degree.
The power that this modular design especially is fit to the use of electric household utensil is the motor of (50～350) W, and winding construction is simply clear, and rule is more or less freely, thereby improves technology.
This modular design can be further designed to, and the number of turn and line that the utmost point of the two-phase winding of the top connection capacitor of described star winding is organized mutually directly equate; In the described delta windings only the number of turn and the line organized mutually of the utmost point of the two-phase winding that connects of the end of one end and the two-phase winding of described star winding directly equate, and this number of turn is 1.73 times of the number of turn organized mutually of the utmost point of the two-phase winding of described star winding, and this line directly is 0.76 times of the line footpath organized mutually of the utmost point of the two-phase winding of described star winding; The top of described star winding connects the utmost point that one of two input terminals of capacitor connect single phase poaer supply, and the top of described star winding does not connect another utmost point of the input terminal connection single phase poaer supply of capacitor.
This design is applicable to the motor that needs reversible operation in the washing machine one class electric household utensil, can keep motor having identical performance along contrary two in running, and star winding and delta windings two parts are born impartial electromagnetic load.Usually also design the number of turn that the number of turn that the utmost point of the third phase winding outside the number of turn that depolarization is organized mutually in described star winding or the delta windings and the two-phase winding that line directly equates organizes is mutually organized mutually less than the utmost point of described two-phase winding, the line footpath that the line footpath is then organized mutually greater than the utmost point of described two-phase winding.This design can realize symmetrical operation.
Technical solution of the present invention and modular design thereof will further specify in embodiment.
Description of drawings
The following drawings is used to illustrate the specific embodiment of the present invention.
Fig. 1 is an embodiment of the invention single-phase condenser motor wiring schematic diagram;
Fig. 2 is an embodiment of the invention single-phase condenser motor developed winding diagram.
Embodiment
The wiring of embodiment of the invention single-phase condenser motor as shown in Figure 1, winding distributes as shown in Figure 2.It is to meet on the basis of the 180W use in washing machine single-phase capacitor operation motor that national sector standard JB/T3758 requires prior art a kind of, and its stator winding rule again and wiring are formed.
It is continued to use prior art constructions and comprises:
---24 groove stator cores;
---connect the lead-out wire A of the single phase poaer supply neutral line N utmost point, two lead-out wire B and C of cross-over connection capacitor, the single phase poaer supply phase line b utmost point connects lead-out wire B or C;
---cage rotor and other mechanical mechanism.
This single-phase condenser motor stator winding is pressed following rule again and wiring:
As shown in Figure 1, this single-phase condenser motor stator winding comprises star winding part of being made up of three phase winding Ay, By, Cy and the delta windings part of being made up of three phase winding Ao, Bo, Co.The top of Ay, By, Cy connects lead-out wire A, B, C respectively, and the top of Ao and the end of Co are connected in the end of Ay, and the top of Bo and the end of Ao are connected in the end of By, and the top of Co and the end of Bo are connected in the end of Cy.
This single-phase condenser motor stator winding still remains 4 utmost points by developed winding diagram rule shown in Figure 2.Three phase winding Ay, By, Cy and three phase winding Ao, Bo, Co distribute by identical phase sequence difference interval 2 π successively/3 space electrical degrees with identical direction of rotation in stator as shown in Figure 1:
Ay organizes mutually by the multitudinous utmost point with another utmost point that the 14th and the 20th groove was organized and be embedded in to a utmost point of the 8th groove mutually and to be in series by being embedded in the 2nd, and top is drawn in the 2nd groove and is access to lead-out wire A, terminally draws in the 20th groove;
By organizes mutually by the multitudinous utmost point with another utmost point that the 18th and the 24th groove was organized and be embedded in to a utmost point of the 12nd groove mutually and to be in series by being embedded in the 6th, and top is drawn in the 6th groove and is access to lead-out wire B, terminally draws in the 24th groove;
Cy organizes mutually by the multitudinous utmost point with another utmost point that the 22nd and the 4th groove was organized and be embedded in to a utmost point of the 16th groove mutually and to be in series by being embedded in the 10th, and top is drawn in the 10th groove and is access to lead-out wire C, terminally draws in the 4th groove;
Ao organizes mutually by the multitudinous utmost point with another utmost point that the 13rd and the 19th groove was organized and be embedded in to a utmost point of the 7th groove mutually and to be in series by being embedded in the 1st, and top is drawn and terminally drawn in the 19th groove in the 1st groove;
Bo organizes mutually by the multitudinous utmost point with another utmost point that the 17th and the 23rd groove was organized and be embedded in to a utmost point of the 11st groove mutually and to be in series by being embedded in the 5th, and top is drawn and terminally drawn in the 23rd groove in the 5th groove;
Co organizes mutually by the multitudinous utmost point with another utmost point that the 21st and the 3rd groove was organized and be embedded in to a utmost point of the 15th groove mutually and to be in series by being embedded in the 9th, and top is drawn and terminally drawn in the 3rd groove in the 9th groove.
As can be seen, the coil side of the coil side of star winding part and delta windings part respectively accounts for 12 grooves, and the two is alternately distributed by groove, and electrical degree is spaced apart 1 groove, i.e. π/6.For example the top of Ay is in the 2nd groove, and the top of Ao is in the 1st groove, and according to phase sequence A-B-C distribution arrangement, the former lags behind the latter's 1 groove, i.e. space electrical degree π/6.During symmetrical operation, the line current in the delta network lags behind corresponding line phase current π/6, and the electric current of circuit Ay promptly shown in Figure 1 lags behind electric current π/6 of Ao.According to similar analysis, other adjacent windings limit also is same situation.Because facies tract reduces, produced the better circular rotating field of three-phase winding motor that connects than traditional two-phase winding single-phase condenser motor or unique star or triangle.
It can also be seen that, this each utmost point of single-phase condenser motor winding is organized the single coil into pitch 6 grooves mutually, be that range is concentrated winding, so winding coefficient is 1, the winding coefficient (0.96) of three phase windings that the winding coefficient (0.88) that is higher than former two-phase winding single-phase condenser motor is connected with unique star or triangle, higher efficient can be arranged, maybe can shorten core length, to lower the electromagnetic material cost.
It is 0.1 that this single-phase condenser motor still keeps former rated slip.To this rated operation point, can be with reference to " monopole asynchronous motor and application thereof (resultant current analytical method) " (Sun Yunpeng, China Machine Press Beijing in 1987 the 1st edition) analysis of the 4th chapter three-phase winding motor capacitance operation that star or triangle are connected and method for designing or by experiment, be equipped with suitable capacitance and select star winding each phase winding partly and the number of turn and the line footpath of delta windings each phase winding partly, reach to symmetrical operation, promptly adjacent slot current time phase angle difference is π/6.
The magnetic potential that design star winding partly produces equates with the magnetic potential that delta windings partly produces, and promptly the number of turn organized mutually of the utmost point of Ao, Bo, Co is respectively 1.73 times of the numbers of turn that the utmost point of Ay, By, Cy organizes mutually, and line directly is 0.76 times of the latter.Can make star winding part and delta windings part respectively bear half of supply voltage or electromagnetic load like this, thus two on visual same six phase motor or star and triangle independently threephase motor design.
For satisfying the situation of washing machine motor reversible operation, design By is identical with the line footpath with the number of turn that the utmost point of Cy two-phase winding is organized mutually, and Ao is identical with the line footpath with the number of turn that the utmost point of Co two-phase winding is organized mutually.This number of turn and line footpath can be designed with reference to threephase motor, referring to " middle-size and small-size threephase motor electromagnetic computation program " (the 1st Shanghai Electric Appliance Science Inst., Ministry of Machinery, Shanghai, 1971) and " miniature three-phase single-phase motor Electromagnetic Design Program " (Guangzhou Inst. of Electric Equipment Science, nineteen eighty-two).Again according to starting and the needs of operation characteristic, make the utmost point of Ay and Bo organize the number of turn mutually and suitably reduce (20～60) % than two-phase before corresponding respectively, line is corresponding increase (10～30) % directly.So again, the motor of rule and wiring generally still can be equipped with the capacitor of existing capacity, keeps the performance of former motor.Present embodiment motor institute distribution container still can be 14 microfarads.The single phase poaer supply phase line b utmost point connects lead-out wire B or C realizes the motor reversible operation.
The motor designs of present embodiment is a symmetrical operation under the former rated slip.Certainly, also can design at other working point symmetrical operation.For example design symmetrical operation when starting, can obtain bigger detent torque.
The motor of present embodiment is 4 utmost points.Certainly, also can be designed as 2 utmost points.At this moment, the coil side that each utmost point is organized mutually is 2 grooves, and breadth coefficient is therefore less than 1, but facies tract still is π/6, and winding coefficient is higher than with number of poles unique star or Atria phase winding.
The star winding part of present embodiment and delta windings partly are series connection.Certainly, also can be in parallel.But the former helps reducing high order harmonic component circulation.
More than two Change In Designs can be referring to " newly organized motor winding repair " the 97th page (Shanghai science tech publishing house March nineteen ninety-five the 1st edition).
The motor of embodiment is an asynchronous motor.Certainly, also can be synchronous motor.In addition, no matter be internal rotor or outer rotor motor, the present invention all is suitable for.
Claims (4)
1, two input terminals that a kind of single-phase condenser motor, its stator have three phase windings and connect single phase poaer supply two utmost points be connected wherein the 3rd input terminal of a utmost point of described single phase poaer supply through capacitor; It is characterized in that:
---described three phase windings are access to the star winding of described three input terminals and the delta windings that triangular ground is access to described three input terminals with comprising star;
---in stator slot, the two is alternately distributed the facies tract of described star winding and the facies tract of delta windings, and adjacent facies tract central space electrical degree is π/6 at interval;
---described adjacent facies tract central space electrical degree interval is all in advance or is all hysteresis with the current time phase angle difference of facies tract.
2, according to the described single-phase condenser motor of claim 1, it is characterized in that:
---described stator is 4 utmost points, 24 grooves and multitudinous utmost point single layer winding, and the coil side of described star winding and the coil side of delta windings respectively account for 12 grooves, and the two is alternately distributed by groove;
---the top of described each phase of star winding connects described three input terminals, and each line terminals of described delta windings is connected in the end of the corresponding phase of described star winding according to phase sequence.
---at rated operation point, described adjacent facies tract current time phase angle difference equates at interval with facies tract central space electrical degree.
3, according to the described single-phase condenser motor of claim 2, it is characterized in that:
---the number of turn and line that the utmost point of the two-phase winding of the top connection capacitor of described star winding is organized mutually directly equate; In the described delta windings only the number of turn and the line organized mutually of the utmost point of the two-phase winding that connects of the end of one end and the two-phase winding of described star winding directly equate, and this number of turn is 1.73 times of the number of turn organized mutually of the utmost point of the two-phase winding of described star winding, and this line directly is 0.76 times of the line footpath organized mutually of the utmost point of the two-phase winding of described star winding;
---one of two input terminals of the top connection capacitor of described star winding connect a utmost point of single phase poaer supply, and the top of described star winding does not connect another utmost point of the input terminal connection single phase poaer supply of capacitor.
4, according to the described single-phase condenser motor of claim 3, it is characterized in that: the number of turn that the number of turn that the utmost point of the third phase winding outside the two-phase winding that the number of turn that depolarization is organized mutually in described star winding or the delta windings and line directly equate is organized is mutually organized mutually less than the utmost point of described two-phase winding, the line footpath that the line footpath is organized mutually greater than the utmost point of described two-phase winding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051709 CN1756043A (en) | 2004-09-28 | 2004-09-28 | Single-phase capacitor motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051709 CN1756043A (en) | 2004-09-28 | 2004-09-28 | Single-phase capacitor motor |
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| CN1756043A true CN1756043A (en) | 2006-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101325353B (en) * | 2007-06-14 | 2010-12-08 | 江门市洗衣机厂 | Electromagnetic design method for Y-wiring single phase capacitance run motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101325353B (en) * | 2007-06-14 | 2010-12-08 | 江门市洗衣机厂 | Electromagnetic design method for Y-wiring single phase capacitance run motor |
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Open date: 20060405 |