CN209046377U - Motor stator, motor and household appliance - Google Patents

Abstract

The utility model discloses a motor stator, a motor and a household appliance, wherein the stator comprises a stator core, and a coil is wound on the pole teeth of the stator core; the coil comprises a first coil and a second coil, wherein the first coil is wound on the peripheral wall of the pole teeth, the second coil is wound on the radial outer side of the first coil, and the first coil and the second coil are connected in parallel or in series through a plurality of switching devices; the wire diameter of the enameled wire of the first coil is smaller than that of the enameled wire of the second coil; and/or the resistivity of the enameled wire of the first coil is larger than that of the enameled wire of the second coil. The utility model discloses still provide the motor that has above-mentioned stator, have the domestic appliance of above-mentioned motor. The utility model discloses can ensure that the resistance value of first coil and the resistance value of second coil equal basically, improve the stationarity and the electrical property of motor operation.

Description

Motor stator, motor and household electrical appliance

Technical field

The utility model relates to motor field more particularly to a kind of motor stator and using the motor stator motor, Household electrical appliance.

Background technique

Washing machine is common household electrical appliance, and existing washing machine is usually provided with a washing tub, and washing tub is by motor Drive rotation.Since there are many different working conditions for washing machine, such as work in washing mode or in dehydration mode.When washing Clothing machine work in washing mode, the velocity of rotation of washing tub is slower, but due in washing tub clothes water absorption it is larger, and do washing Inner bucket water amount is more, the heavier loads of motor.When washing machine work is in dehydration mode, the velocity of rotation of washing tub is very fast, this When washing tub in water it is less, the light load of motor.Therefore, different working condition that there are many motors that washing machine uses, Such as high speed low-load state, low speed high load condition.

The motor that washing machine uses is usually three-phase motor, and motor has a motor stator, and stator includes stator core, Be wound with three-phase coil on stator core, the coil of existing three-phase motor mainly carried out by way of distributed coiling around Line, but the end of the coil winding of distributed coiling production is higher, the resistance of coil is higher, and the performance of motor is undesirable, people Start to be considered as to concentrate the mode coiling of coiling.

The mode for concentrating coiling is the coiling on the stator core of a full circle, and this winding mode can be used one A line mouth moves back and forth on stator core and quick coiling.The advantage of this winding mode is the end of coil winding It is low, the resistance of coil is reduced, the performance of motor is improved.

As shown in Figures 1 and 2, present motor stator 10 has circular stator core 11, and stator core includes yoke Portion 12 and the teeth portion that 12 radial outside of yoke portion is arranged in, teeth portion includes multiple pole teeth 13, and coiling is wired on pole tooth 13 Circle 14.Fig. 1 and it is shown in Fig. 2 be one phase coil of coiling motor stator.Three-phase motor is provided with three-phase coil, each phase coil Including the subcoil that is wound on not homopolarity tooth 13, such as subcoil 15, phase between multiple subcoils 15 of same phase coil Mutually be connected in series, such as by line 16 be connected with each other.In addition, each phase coil is provided with an inlet wire and an outlet 17, for connecting external power supply.

Since the work characteristics of the motor of washing machine is the state of washing mode subordinate's low-speed heave-load, motor is needed at this time There is counter electromotive force as high as possible and reduce winding current, reduces loss, improve efficiency, and under dehydration mode, it is weak due to having Magnetic control, current of electric is larger at this time, needs low resistance, reduces loss, improves efficiency.And the motor of current washing machine due to Two kinds of washing, dehydration operating modes need to be taken into account, to make motor after weak magnetic can reach the dehydrating speed of requirement, winding back emf design It is often smaller, therefore in the case where washing operating condition, efficiency is very low, influences energy consumption.Load capacity and effect to take into account washing simultaneously Rate, dehydrating speed are also unable to reach very high, and the dehydration rate of washing machine is also difficult to be made high.

In order to solve this problem, each phase coil of existing some motors is provided with two groups of coils, i.e., in stator core Two groups of coils of upper coiling connect two groups of coils under washing mode, increase counter electromotive force, under dehydration mode, by two groups of lines Circle is in parallel, reduces the weak magnetoelectricity stream of coil, improves the efficiency of motor.

But this process requirement two groups of coils of coiling on stator core, such as two groups of coiling on the same pole tooth Coil, usually first coiling first layer coil, then the coiling second layer coil on first layer coil on the tooth of pole.In order to ensure electricity The electric property of machine, the number of turns of first layer coil and the equal turn numbers of second layer coil.But due to the outer diameter of second layer coil compared with Greatly, the total length of second layer coil is caused to be greater than the total length of first layer coil, this results in the resistance of two groups of coils unequal. Such case results in the electric property of two groups of coils to have differences, and such as it is unequal to be formed by counter electromotive force for two groups of coils.

If two groups of coil series connection, the resistance of two groups of coils is unequal to bring big shadow to the operation of motor It rings, but if when two groups of coils from parallel connection of coils, since the resistance of two groups of coils is unequal, the resistance value after leading to parallel connection is not one group of line The half of the resistance value of circle, when this results in motor operation, inductance, the counter electromotive force of two groups of coils be not identical, influences motor Electric property, and then there is the problem of motor driven exception, the normal operation of motor is influenced, such as be likely to occur when motor operation Phenomena such as exception shakes, output power is insufficient.

Utility model content

First purpose of the utility model is to provide a kind of motor stator for being conducive to motor stabilizing operation.

Second purpose of the utility model is to provide a kind of motor using above-mentioned motor stator.

The third purpose of the utility model is to provide a kind of household electrical appliance using above-mentioned motor.

In order to realize the first above-mentioned purpose, motor stator provided by the utility model includes stator core, stator core With yoke portion and pole tooth, coil is wound on the tooth of pole；Wherein, coil includes first coil and the second coil, first coil It is wound on the tooth rim wall of pole, the second coil winding is in the radial outside for stating first coil, the first end of first coil and the second line It is connected with first switch between the first end of circle, is connected with second between the second end of first coil and the second end of the second coil Switch is connected with third switch between the second end of first coil and the first end of the second coil；Also, the enamel-cover of first coil Line footpath of the line footpath of line less than the enameled wire of the second coil；And/or the resistivity of the enameled wire of first coil is greater than the second coil Enameled wire resistivity.

Another kind motor stator provided by the utility model includes stator core, and stator core has yoke portion and pole tooth, Coil is wound on the tooth of pole；Wherein, coil includes first coil and the second coil, and first coil is wound on the tooth rim wall of pole, Radial outside of second coil winding in first coil；Enameled wire of the line footpath of the enameled wire of first coil less than second coil Line footpath；And/or the resistivity of the enameled wire of first coil is greater than the resistivity of the enameled wire of the second coil.

By above scheme as it can be seen that by the line footpath for the enameled wire for adjusting first coil and the second coil, and/or adjust first The resistivity of the enameled wire of coil and the second coil can make two to adjust the resistance value of first coil Yu the second coil The resistance value of group coil is of substantially equal.In this way, when first switch and second switch closure, third switch disconnect, first coil It may insure two in this way since the resistance value of first coil and the resistance value of the second coil are of substantially equal with the second coils from parallel connection of coils Inductance, the counter electromotive force of group coil are of substantially equal, and motor runs smoothly, and is also beneficial to the driving of motor.

One Preferable scheme is that, the resistance value of the resistance value of first coil and the second coil within a preset range, such as exists In the range of ± 7%.More there is choosing, the resistance value of first coil is equal with the resistance value of the second coil.In this way it can be ensured that the When one coil and the second coils from parallel connection of coils, first coil is equal with the inductance of the second coil, counter electromotive force, improves the steady of motor operation It is qualitative.

Further embodiment is the resistivity phase of the resistivity of the enameled wire of first coil and the enameled wire of the second coil Deng, and the ratio of the line footpath square of the enameled wire of the length and first coil of first coil is the first ratio, the length of the second coil Degree and the ratio of the line footpath square of the enameled wire of the second coil are the second ratio, the difference of the first ratio and the second ratio relative to First ratio is within a preset range.Preferably, the first ratio is equal with the second ratio.

Optional scheme is that the line footpath of the enameled wire of first coil is equal with the line footpath of the enameled wire of the second coil, first The product of the resistivity of the enameled wire of the length and first coil of coil is the first product, the length of the second coil and the second coil Enameled wire resistivity product be second the first product of product and the second product difference relative to the first product default In range, it is preferred that the first product is equal with the second product.

Due to the resistance value and enameled wire of coil line footpath square, resistivity it is related, set two groups of coils line The ratio relation of diameter, resistivity, it can be ensured that the resistance value of first coil is equal with the resistance value of the second coil.

Further embodiment is, coil is two-phase or more, is wound with the first sub-line on the corresponding pole tooth of each phase coil Circle, the first subcoil diameter are wound with the second subcoil outward, and multiple first subcoils of same phase coil are connected in series to form the Multiple second subcoils of one coil, same phase coil are connected in series to form the second coil.

It can be seen that being directed to three-phase motor, each phase coil includes first coil and the second coil, in this way can be true The resistance value for protecting two groups of coils of each phase coil of three-phase motor is all of substantially equal, it can be ensured that the stabilization of three-phase motor operation Property.

To realize the second above-mentioned purpose, motor provided by the utility model includes stator and rotor, and the stator is above-mentioned Motor stator.

To realize above-mentioned third purpose, household electrical appliance provided by the utility model include shell, are provided in shell The motor stated.

Detailed description of the invention

Fig. 1 is the structure chart of existing one phase coil of electronics stator coiling.

Fig. 2 is the structural exploded view of existing one phase coil of electronics stator coiling.

Fig. 3 is the structure chart of one phase coil of the utility model motor stator embodiment coiling.

Fig. 4 is the structural exploded view of one phase coil of the utility model motor stator embodiment coiling.

Fig. 5, which is the utility model motor stator embodiment three-phase coil, is electrically connected schematic diagram with switching group.

Fig. 6 is the work flow diagram of the utility model household electrical appliance embodiment.

The following is a further explanation of the present invention with reference to the accompanying drawings and embodiments.

Specific embodiment

The motor of the utility model includes stator and rotor, and household electrical appliance can be the electric appliances such as washing machine, household Above-mentioned motor is provided in electric appliance, also, the coil of motor carries out by the way of concentrating coiling, to improve the performance of motor.

Motor stator and its coil winding method embodiment:

The motor of the present embodiment includes stator and rotor, and referring to Fig. 3, stator 20 includes stator core 21, stator core 21 include circular yoke portion 22, and the radial outside in yoke portion 22 is provided with teeth portion, and the teeth portion of the present embodiment includes multiple pole teeth 23, the motor of the present embodiment is three-phase motor, therefore, the integral multiple that the quantity of pole tooth 23 is three, such as 36.The electricity of the present embodiment Machine is external rotor electric machine, i.e. rotor radial outside that stator 20 is arranged in, and therefore, the yoke portion 22 of stator 20 is located at the radial direction of motor Inside, pole tooth 23 are located at the radial outside in yoke portion 22.

It is wound with coil in the teeth portion of stator 20, in the present embodiment, is wound with two layers of coil on each pole tooth 23, such as scheme Shown in 4, first coil 30 is wound on the peripheral wall of pole tooth 23, and be wound with the second coil outward in the diameter of first coil 30 35.It is the stator structure exploded view for being wound with a phase coil shown in Fig. 4, is such as wound with U phase coil.Since U phase coil is corresponding with Multiple pole teeth 23 are required to the corresponding first coil 30 of coiling and the second coil 35 on the pole tooth 23 corresponding to U phase.

Specifically, the first coil of each phase may include multiple first subcoils, the second coil of each phase be can wrap Multiple second subcoils are included, for example, being wound with the first subcoil 31 of U phase, pole tooth 23 as shown in Figure 4 on a pole tooth 23 Peripheral wall on be wound with the first subcoil 31, substantially in a rectangular parallelepiped shape due to pole tooth 23, be wound on 23 peripheral wall of pole tooth First subcoil 31 is substantially in the shape of cuboid.

Also, multiple first subcoils of same phase coil are serially connected, as shown in Figure 4, and adjacent two the Passed through the interconnection of line 32 between one subcoil 31.Preferably, crossed beam trunking 24 is set on stator core 21, and crossing line 32 can be with It is passed through from crossed beam trunking 24.Also, it is provided with inlet wire 33 on one of them first subcoil 32, on another first subcoil 31 It is provided with outlet 34, external alternating current flows into the first coil of U phase by inlet wire 33, and by each the of first coil After one subcoil 31, flowed out from outlet 34.

After the first coil 30 of each phase of coiling, the second coil 35 of each phase of coiling is needed.In the present embodiment, Mei Yixiang Second coil 35 of coil is connected in series by multiple second subcoils 36, such as the second coil 35 of U phase coil includes multiple the Two subcoils 36, in the present embodiment, in pole, radially, the second subcoil 36 is located at the outside of the first subcoil 31 to tooth 23.For Ensure the steady of motor operation, the equal turn numbers of the number of turns of the first subcoil 31 and the second subcoil 36, but due to the second son Coil 36 is located at the radial outside of the first subcoil 31, and therefore, the total length of the second subcoil 36 is greater than the first subcoil 31 Total length.

It is also to be connected in series, such as multiple the second of U phase coil are sub between multiple second subcoils 36 of same phase coil It is connected in series between coil 36, passed through the connection of line 37 between two adjacent the second subcoils 36, crossing line 37 can also be from mistake It is passed through in wire casing 24.Also, one of them second subcoil 36 is provided with inlet wire 38, is provided on another second subcoil 36 Outlet 39, external alternating current flow into the second coil from inlet wire 38 and flow out from outlet 39.

In the present embodiment, the first coil 30 of same phase coil and the second coil 35 connected by multiple switch realization or Electrical connection in parallel.As shown in figure 5, for U phase coil, it is assumed that first coil U1, the second coil are U2, then U phase line It is connected with first switch K11 between the first end of the first coil U1 of circle and the first end of the second coil U2, the first of U phase coil Second switch K21, and the second end of first coil U1 are connected between the second end of coil U1 and the second end of the second coil U2 Third switch K31 is connected between the first end of the second coil U2.

In the first operation mode, it can be closed at first switch K11 and second switch K21, disconnect third switch K31, at this point, first coil U1 is in parallel with the second coil U2.In the second operation mode, first switch K11 and second switch K21 is disconnected, and third switch K31 is closed, at this point, first coil U1 connects with the second coil U2.

Identical, V phase coil also includes first coil V1 and the second coil V2, the first end of first coil V1 and the second line It encloses between the first end of V2 and is connected with first switch K12, between the second end of first coil V1 and the second end of the second coil V2 It is connected with second switch K22, and is connected with third switch between the second end of first coil V1 and the first end of the second coil V2 K32。

In the first operation mode, it can be closed at first switch K12 and second switch K22, disconnect third switch K32, at this point, first coil V1 is in parallel with the second coil V2.In the second operation mode, first switch K12 and second switch K22 is disconnected, and third switch K32 is closed, at this point, first coil V1 connects with the second coil V2.

Identical, W phase coil also includes first coil W1 and the second coil W2, the first end of first coil W1 and the second line It encloses between the first end of W2 and is connected with first switch K13, between the second end of first coil W1 and the second end of the second coil W2 It is connected with second switch K23, and is connected with third switch between the second end of first coil W1 and the first end of the second coil W2 K33。

In the first operation mode, it can be closed at first switch K13 and second switch K23, disconnect third switch K33, at this point, first coil W1 is in parallel with the second coil W2.In the second operation mode, first switch K13 and second switch K23 is disconnected, and third switch K33 is closed, at this point, first coil W1 connects with the second coil W2.

Preferably, multiple first switch K11, K12, K13 are simultaneously switched off or are closed, multiple second switch K21, K22, K23 is also to simultaneously switch off that be perhaps closed multiple third switch K31, K32, K33 be also to simultaneously switch off or be closed, in this way, U phase First coil U1 it is in parallel with the second coil U2 when, the first coil V1 of V phase is also in parallel, and the of W phase with the second coil V2 One coil W1 is also in parallel with the second coil W2.When the first coil U1 of U phase connects with the second coil U2, the First Line of V phase Enclosing V1 is also to connect, and the first coil W1 of W phase is also to connect with the second coil W2 with the second coil V2.Therefore, three-phase coil First coil and the second coil be simultaneously in series connection or simultaneously in parallel connection.

In the present embodiment, first switch K11, K12, K13, second switch K21, K22, K23 and third switch K31, K32, K33 are Sofe Switch, such as the switching device that triode or metal-oxide-semiconductor, IGBT etc. are electrically controllable, by opening to triode etc. Device input high level signal or low level signal are closed, can control the on-off of switching device, that is, realize switch state Variation, as being closed when switching device is in the conductive state.

Since first coil and the total length of the second coil are unequal, if the enameled wire line footpath of first coil and the second line The line footpath of the enameled wire of circle is equal, and the enameled wire of first coil is equal with the resistivity of the enameled wire of the second coil, then and The resistance value of one coil and the resistance value of the second coil are then unequal, in this way, will lead to the inductance and the second coil of first coil Inductance it is not identical, the counter electromotive force formed on the counter electromotive force and the second coil formed when motor operation in first coil is also It is unequal, influence the stability of motor operation.

Therefore, in the present embodiment, by the line footpath of the enameled wire of adjusting first coil and the line footpath of the second enameled wire, or The resistivity of first coil enameled wire and the resistivity of the second coil enameled wire are adjusted, to adjust first coil and the second coil Resistance value, so that the resistance value of first coil and the resistance value of the second coil are of substantially equal.

Line footpath (enameled wire since the resistance value of coil is directly proportional to the length of coil enameled wire, resistivity, with enameled wire The diameter of cross section) square be inversely proportional, for this purpose, the line footpath for being located at the enameled wire of the first coil of internal layer should be less than be located at it is outer The line footpath of the enameled wire of the second coil of layer, alternatively, the resistivity for being located at the enameled wire of the first coil of internal layer, which is greater than, is located at outer layer The second coil enameled wire resistivity.Therefore, it is possible to use the lesser enameled wire coiling first coil of line footpath, uses line footpath Biggish the second coil of enameled wire coiling, alternatively, using the biggish enameled wire coiling first coil of resistivity, using resistivity compared with Small the second coil of enameled wire coiling.

Of course, it is possible to adjust the line footpath and resistivity of the enameled wire of two groups of coils, the i.e. enameled wire of first coil simultaneously Line footpath should be less than positioned at the second coil of outer layer enameled wire line footpath, also, be located at internal layer first coil enameled wire Resistivity be greater than positioned at outer layer the second coil enameled wire resistivity.In this way, the resistance value of first coil and the second line The resistance value of circle is of substantially equal, other electric parameters, as inductance, counter electromotive force are also of substantially equal.

Specifically, the resistivity of the enameled wire of first coil is equal with the resistivity of the enameled wire of the second coil, and first The ratio of the line footpath square of the enameled wire of the length and first coil of coil is equal to the length of the second coil and the paint of the second coil The ratio of the line footpath square of envelope curve.Alternatively, the line footpath of the enameled wire of first coil is equal with the line footpath of the enameled wire of the second coil, And the product of the resistivity of the enameled wire of the length and first coil of first coil is equal to the length and the second coil of the second coil Enameled wire resistivity product.

Certainly, in actual production process, the resistance value of the resistance value of first coil and the second coil is difficult to complete phase Deng effect of the invention also may be implemented therefore it may only be necessary to which the resistance value of first coil and the resistance value of the second coil are of substantially equal Fruit.Specifically, the difference of the resistance value of first coil and the resistance value of the second coil is within a preset range, such as first coil The difference of resistance value and the resistance value of the second coil is within ± the 7% of the resistance value of first coil, it may be considered that First Line The resistance value of circle and the resistance value of the second coil are of substantially equal.

Preferably, which can be with ± 5% even ± 3%, in this way, the resistance value of first coil and the second coil Resistance value difference it is smaller, be more advantageous to the operation of motor.

Specifically, the resistivity of the enameled wire of first coil is equal with the resistivity of the enameled wire of the second coil, First Line The ratio of the line footpath square of the enameled wire of the length and first coil of circle is the first ratio, the length of the second coil and the second coil The ratio of line footpath square of enameled wire be the second ratio, and the difference of the first ratio and the second ratio is relative to first step ratio In above-mentioned preset range.Alternatively, the line footpath of the enameled wire of first coil is equal with the line footpath of the enameled wire of the second coil, the The product of the resistivity of the enameled wire of the length and first coil of one coil is the first product, the length of the second coil and the second line The product of the resistivity of the enameled wire of circle is the second product, and the difference of the first product and the second product is relative to the first product upper In the preset range stated.

The motor stator 20 of the present embodiment coiling, the i.e. coil of coiling motor stator 20 by the way of concentrating coiling When, the first first coil of each phase of coiling respectively, and after the first coil coiling of each phase finishes, then the of each phase of coiling respectively Two coil.For example, the first coil 30 of first coiling U phase, corresponding first son of coiling such as on each corresponding pole tooth 23 of U When coiling, a line mouth can be used on the stator core 21 of full circle, successively in each corresponding pole tooth of U in coil 31 Coiling on 23, such as after first subcoil 31 of one pole tooth 23 of coiling, line mouth is moved to the pole tooth 23 of next U phase, this When, the line 32 of crossing connected between two the first subcoils 31 passes through crossed beam trunking 24.When line mouth on the pole tooth 23 of next U phase around When line, another the first subcoil 31 will be formed.After all first subcoil, 31 coilings of U phase, multiple first sub-lines 31 series connection of circle forms the first coil 30 of U phase.

Similarly, after the first coil 30 of coiling U phase, the first sub-line of coiling V phase on the corresponding pole tooth 23 of V Circle, the winding method of the first subcoil of V phase and the winding method of the first subcoil of U phase are identical.In the First Line of coiling V phase After circle, the first coil of coiling W phase, the winding method of the first subcoil of the winding method and U phase of the first subcoil of W phase It is identical, it repeats no more.

After the first coil coiling of each phase finishes, the second coil of each phase of coiling respectively, such as first coiling U phase the Two coil, specifically, such as using line mouth in each 31 second subcoil of radial outside coiling 36 of first coil of U phase coil In the second subcoil of radial outside coiling 36 of first coil 31, and two adjacent the second subcoils 36 passed through the company of line 37 It connects, in this way, multiple second subcoils 36 of U phase coil are serially connected the second coil to form U phase.

After the second coil of coiling U phase, continue the second coil of coiling V phase, the second coil of last coiling W phase. Preferably, the first coil of each phase coil all has an inlet wire and outlet, and the second coil of each phase coil also has There are an inlet wire and outlet.

In the first coil of each phase and after the second coil winding, by the inlet wire of the first coil of each phase, outlet according to The connection type of Fig. 5 is connected to each switch, i.e., by the first end of the first coil U1 of U phase and the first end of the second coil U2 point It is not connected to the both ends of first switch K11, the second end of first coil U1 and the second end of the second coil U2 are respectively connected to The first end of the second end of first coil U1 and the second coil U2 is respectively connected to third switch by the both ends of second switch K21 The both ends of K31.V phase coil is connect with the connection type of W phase coil according to the connection type of U phase coil, is repeated no more.

The first coil of the present embodiment and the second coil are all made of the mode coiling for concentrating coiling, although there is no using double Line and around mode coiling, but since first coil and the second coil all have inlet wire and the outlet of oneself, so as to pass through The advantages of multiple switch controls the series-parallel relationship of first coil and the second coil, realizes Double-wire parallel wound, and then improve electricity The performance of machine, and do not increase the difficulty of the technique for coiling of stator coil.

Certainly, in above-described embodiment, each phase coil includes two groups of coils, i.e. first coil and the second coil, is actually answered Used time can also include more multiple groups coil, for example including three groups of coils, and can be realized by the way that multiple switch device is arranged Between multiple groups coil in parallel or in series.Also, in order to ensure the resistance value of each group of coil is equal, along each subcoil Radial direction, be located at internal layer, i.e., by the coil of proximal pole tooth rim wall enameled wire line footpath is smaller or the resistivity of enameled wire is larger, And being located at outer layer, i.e., the enameled wire line footpath of the coil far from pole tooth rim wall is larger or the resistivity of enameled wire is smaller.

Motor and motor working method embodiment:

The motor of the present embodiment has a stator and a rotor, rotor can be relative to stator rotation, it is preferred that Motor uses the motor stator of above-mentioned motor stator embodiment, i.e. the coil of motor stator includes first coil and the second coil, It is connected with multiple switch, such as electronic switching device between first coil and the second coil, passes through the on-off shape of control switch device State, realization first coil are in series or in parallel with the second coil.

In addition, by adjust first coil enameled wire line footpath or resistivity so that the resistance value of first coil with The resistance value of second coil is of substantially equal, and in motor operation, inductance, the counter electromotive force of first coil and the second coil have substantially It is equal.

After electrical power operation, according to the needs of motor running mode, each coil corresponding first can be closed at and opened Pass and second switch, such as it is closed at the first switch of the first switch K11 of U phase coil, second switch K21, V phase coil K12, the first switch K13 of second switch K22, W phase coil, second switch K23, and at the same time the third for disconnecting U phase coil is opened The third switch K33 of third switch K32, W phase coil of K31, V phase coil is closed, at this point, the first coil U1 of U phase coil and the Two coil U2 is in parallel, and the first coil V1 of V phase coil is in parallel with the second coil V2, and the first coil W1 and second of W phase coil Coil W2 is in parallel.At this point, the counter electromotive force of motor is smaller, weak magnetoelectricity stream can be reduced, the revolving speed of motor is very fast.

In a second mode of operation, the first switch K11 of U phase coil, second switch K21, V phase coil are simultaneously switched off First switch K12, the first switch K13 of second switch K22, W phase coil, second switch K23, and at the same time closure U phase coil Third switch K31, V phase coil third switch K32, W phase coil third switch K33, at this point, the First Line of U phase coil Circle U1 connects with the second coil U2, and the first coil V1 of V phase coil connects with the second coil V2, and the first coil of W phase coil W1 connects with the second coil W2.At this point, the counter electromotive force of motor is larger, the electric current of flowing through coil is smaller, and motor load ability is strong.

Household electrical appliance and household electric appliance operation embodiment of the method:

The household electrical appliance of the present embodiment can be provided with the household electrical appliance of motor with washing machine, air conditioner or electric fan etc., By taking washing machine as an example, it is provided with shell on washing machine, washing tub is provided in shell and drives the motor of washing tub rotation, Preferably, which selects the motor of above-described embodiment.

The workflow of washing machine is introduced below with reference to Fig. 6.Firstly, executing step S1 after washing machine starting, judging to do washing Whether machine works under washing mode, if so, executing step S2, the corresponding first switch of each phase coil, second switch are disconnected, Third is closed the switch, such as by the first switch K11 of U phase coil, the first switch K12 of second switch K21, V phase coil, First switch K13, the second switch K23 of two switch K22, W phase coils are disconnected, by third switch K31, V phase line of U phase coil The third switch K33 of third switch K32, W phase coil of circle is closed, at this point, the first coil of each phase coil and the second coil Series connection, the responsible ability of motor is strong, but the electric current of coil is smaller, can promote the efficiency of motor.

If the judging result of step S1 be it is no, then follow the steps S3, judge whether washing machine is in dewatering work mode, If so, executing step S4, the corresponding first switch of each phase coil, second switch are closed, and third is switched and is disconnected, at this point, The first coil of each phase coil and the second coils from parallel connection of coils can also reduce weak magnetoelectricity stream since winding back emf is smaller, and motor turns It is fast very fast, meet the requirement of dewatering work mode.

Be in the judging result for executing step S2, S4 or step S3 it is no, execution step S5 judges whether washing machine stops Work, if so, executing step S6, all switches of each phase coil are disconnected, motor stalls.

As it can be seen that the first coil of each phase coil is connected with the second coil in the case where washing operating mode, the anti-electricity of coil is improved Gesture solves the problems, such as washing operating mode low efficiency, and under dewatering work mode, the first coil of each phase coil and the second line Circle is in parallel, reduces the back-emf, inductance, resistance value of coil, solves the problems, such as that dewatering work mode revolving speed is low.Therefore, this is practical Novel motor can be thinner than what existing motor was done, and motor volume is smaller, to have to reduce the creation of the volume of washing machine Sharp condition.

Certainly, above-mentioned scheme is the utility model preferred embodiment, and practical application is that can also have more Variation, for example, the variation of the line footpath size of the enameled wire used, alternatively, the variation of motor stator shape, these change not shadows The implementation for ringing the utility model, also should include within the protection scope of the present utility model.

Claims (11)

1. motor stator, comprising:

Stator core, the stator core have yoke portion and pole tooth, are wound with coil on the pole tooth；

It is characterized by:

The coil includes first coil and the second coil, and the first coil is wound on the pole tooth rim wall, and described Two coil is wound on the radial outside of the first coil, the first end of the first end of the first coil and second coil Between be connected with first switch, be connected with second between the second end of the first coil and the second end of second coil and open It closes, third switch is connected between the second end of the first coil and the first end of second coil；

The line footpath of the enameled wire of the first coil is less than the line footpath of the enameled wire of second coil；And/or

The resistivity of the enameled wire of the first coil is greater than the resistivity of the enameled wire of second coil.

2. motor stator according to claim 1, it is characterised in that:

The difference of the resistance value of the first coil and the resistance value of second coil is within a preset range.

3. motor stator according to claim 2, it is characterised in that:

The resistivity of the enameled wire of the first coil is equal with the resistivity of enameled wire of second coil, the First Line The ratio of the line footpath square of the enameled wire of the length of circle and the first coil is the first ratio, the length of second coil with The ratio of the line footpath square of the enameled wire of second coil is the second ratio, the difference of first ratio and second ratio Value is relative to first ratio in the preset range.

4. motor stator according to claim 2, it is characterised in that:

The line footpath of the enameled wire of the first coil is equal with the line footpath of enameled wire of second coil, the first coil The product of the resistivity of the enameled wire of length and the first coil is the first product, the length of second coil and described the The product of the resistivity of the enameled wire of two coil is the second product, the difference of first product and second product relative to First product is in the preset range.

5. according to the described in any item motor stators of claim 2 to 4, it is characterised in that:

The preset range is ± 7%.

6. motor stator according to claim 5, it is characterised in that:

The preset range is ± 3%.

7. according to the described in any item motor stators of claim 2 to 4, it is characterised in that:

The resistance value of the first coil is equal with the resistance value of second coil.

8. motor stator according to any one of claims 1 to 4, it is characterised in that:

The coil is two-phase or more, is wound with the first subcoil on the corresponding pole tooth of each phase coil, described first Subcoil diameter is wound with the second subcoil outward, and multiple first subcoils of same phase coil are connected in series to form described Multiple second subcoils of one coil, same phase coil are connected in series to form second coil.

9. motor stator, comprising:

Stator core, the stator core have yoke portion and pole tooth, are wound with coil on the pole tooth；

It is characterized by:

The coil includes first coil and the second coil, and the first coil is wound on the pole tooth rim wall, and described Two coil is wound on the radial outside of the first coil；

The line footpath of the enameled wire of the first coil is less than the line footpath of the enameled wire of second coil；And/or

The resistivity of the enameled wire of the first coil is greater than the resistivity of the enameled wire of second coil.

10. motor, including stator and rotor, the stator is motor stator as described in any one of claim 1 to 9.

11. household electrical appliance have shell, which is characterized in that be provided with motor as claimed in claim 10 in the shell.