WO2018133560A1

WO2018133560A1 - Washing machine and control method therefor

Info

Publication number: WO2018133560A1
Application number: PCT/CN2017/113995
Authority: WO
Inventors: 吴迪; 陈金涛; 诸自强; 胡义明; 王洪晓
Original assignee: 广东威灵电机制造有限公司; 美的威灵电机技术（上海）有限公司
Priority date: 2017-01-18
Filing date: 2017-11-30
Publication date: 2018-07-26

Abstract

Disclosed are a washing machine and a control method therefor, wherein the washing machine comprises an inner drum (2); a pulsator (3); and a driving device (4), wherein the driving device (4) comprises a stator (41), a magnetic reluctance rotor (42) and a permanent magnet rotor (43), wherein the stator (41) comprises a first winding set (412) and a second winding set (413) which independently drive the magnetic reluctance rotor (42) and the permanent magnet rotor (43) to rotate respectively; and the magnetic reluctance rotor (42) and the permanent magnet rotor (43) independently drive the inner drum (2) and the pulsator (3) to rotate respectively.

Description

Washing machine and control method thereof

Technical field

The invention relates to the technical field of household appliances, in particular to a washing machine and a control method thereof.

Background technique

Because of the short washing time and high washing ratio, the washing machine is still trusted by customers after decades of market testing. Haier and other manufacturers have proposed a dual-powered washing machine structure. Although the washing ratio can be improved in principle and the washing time is shortened, the power distribution is adopted due to the mechanical differential method. The structure is complicated, the system integration is low, and the power density is small. Gain large-scale market applications.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a washing machine that can achieve dual-power washing, and is compact in structure, high in efficiency, high in reliability, and low in noise.

The present invention also proposes a control method of the above washing machine.

A washing machine according to a first aspect of the present invention, comprising: an outer tub; an inner tub, the inner tub being rotatably disposed in the outer tub; and a pulsator rotatably disposed on the inner tub relative to the inner tub a driving device comprising: a ring-shaped reluctance rotor, a permanent magnet rotor and a stator, the stator, the reluctance rotor and the permanent magnet rotor being sequentially nested inside and outside and mutually rotatable, and The stator, the reluctance rotor, and each adjacent two of the permanent magnet rotors are spaced by an air gap, the stator including: a stator core, a first winding, and a second winding, the first winding And the second winding are both wound on the stator core, and the first winding and the second winding are independent of each other, and the first winding and the second winding are respectively connected to the reluctance rotor Corresponding to the permanent magnet rotor to independently drive the reluctance rotor and the permanent magnet rotor to rotate, wherein one of the reluctance rotor and the permanent magnet rotor is fixedly connected to the inner tub Driving the inner tub to rotate, and the magnetic A permanent magnet rotor and the other rotor fixed relative to the pulsator is connected for driving rotation of the pulsator.

According to the washing machine of the present invention, the dual-power washing and dehydrating is realized by the method of no mechanical differential and no clutch, the system integration is high, the energy consumption is low, the washing ratio is high, and the reliability is greatly improved due to the reduction of mechanical parts. In addition, the driving device uses the magnetoresistive modulation effect to generate driving torque, and the torque density is higher than that of the conventional permanent magnet motor, which further increases the power density of the system and reduces the energy consumption.

According to an example of the invention, either one of the first winding and the second winding is a single-phase winding or a multi-phase winding, and the number of phases of the first winding and the second winding is the same or different.

According to an example of the present invention, the stator core further includes a stator casing, and the stator casing is sleeved on the stator The outer side of the iron core.

According to an example of the present invention, the reluctance rotor includes a magnetically permeable reluctance core and a non-magnetically permeable spacer block, and the reluctance core and the spacer block are alternately arranged in a ring shape.

According to an example of the present invention, the reluctance rotor further includes: a non-magnetically-conductive cage having a cylindrical shape with both ends open, and a peripheral wall of the cage is formed along a circumference of the cage a plurality of mounting slots arranged at intervals; an end plate enclosing one end of the retainer, the reluctance core being disposed in the mounting slot and including a plurality of one-to-one correspondence with the mounting slot .

According to an example of the present invention, the permanent magnet rotor includes: a magnetically permeable permanent magnet core and a permanent magnet, the permanent magnet including a plurality of circumferentially spaced apart along the permanent magnet core, and two adjacent The polarities of the permanent magnets are opposite.

According to an example of the present invention, the washing machine includes a first transmission shaft and a second transmission shaft, the second transmission shaft is a hollow shaft, and the first transmission shaft is disposed inside the second transmission shaft, and a center line of the first transmission shaft and a center line of the second transmission shaft, wherein one end of the first transmission shaft is connected to the pulsator and the other end is connected to the reluctance rotor and the permanent magnet One of the outer sides of the rotor is connected, one end of the second transmission shaft is connected to the inner tub and the other end is connected to one of the reluctance rotor and the inner side of the permanent magnet rotor.

According to an example of the present invention, the reluctance rotor includes a magnetically permeable reluctance core and a non-magnetically permeable spacer block, the reluctance core and the spacer block are alternately arranged in a ring shape, and the reluctance core the quantity of p _r, the first winding and the second winding respectively winding span y _1s and y _1ad and rotating magnetic field are formed on the pole number p _s and p _ad of the permanent magnet rotor forming A permanent magnetic field having a pole logarithm of p _f , where p _r =|p _s ±p _f |; p _ad =p _f ≠p _s ;y _1s ≠y _1ad .

According to an example of the present invention, current injection frequencies of the first winding and the second winding respectively satisfy: ω _s = p _r Ω _r - p _f Ω _f ; ω _ad = p _f Ω _f , where ω _s and Ω _ad is the control frequency of the two sets of windings respectively, Ω _r and Ω _f are the mechanical rotational speeds of the reluctance rotor and the permanent magnet rotor, respectively, and the current injection phase angles of the first winding and the second winding respectively satisfy: θ _s =-p _r θ _r +p _f θ _f ; θ _ad =-p _f θ _f , where θ _s and θ _ad are the phase angles of the injection current axes of the two sets of windings, and θ _f and θ _r are permanent magnet rotors and The mechanical angle difference between the reluctance rotor and the d-axis alignment position.

According to the control method of the washing machine of the present invention, the control method includes: in the washing mode, the pulsator is opposite to the same or opposite to the inner tub but rotates at different speeds; in the dehydration mode, the pulsator and the damper The inner bucket rotates in the same direction and at the same speed.

According to the control method of the washing machine of the present invention, the dual-power washing and the dehydration are directly realized by the control method, thereby further reducing the volume of the entire power system, compact structure, and high efficiency.

The additional aspects and advantages of the invention will be set forth in part in the description which follows.

DRAWINGS

1 is an exploded view of a washing machine in accordance with an embodiment of the present invention;

Figure 2 is a schematic view of the washing machine shown in Figure 1;

Figure 3 is a schematic view showing the direction of rotation of the inner tub and the pulsator shown in Figure 2 during the washing process;

Figure 4 is a schematic view showing the direction of rotation of the inner tub and the pulsator shown in Figure 2 during dehydration;

Figure 5 is a schematic view of a control device of a washing machine in accordance with an embodiment of the present invention;

6 is a flow chart of a control method of a washing machine in accordance with an embodiment of the present invention.

Reference mark:

Washing machine 100,

Outer bucket 1, inner bucket 2, pulsator 3,

Drive device 4,

a stator 41, a stator core 411, a first winding 412, a second winding 413, a stator casing 414,

Reluctance rotor 42, magnetoresistive core 421, cage 422, mounting groove 4221, spacer block 4222, end plate 423,

Permanent magnet rotor 43, permanent magnet core 431, permanent magnet 432,

a first drive shaft 5, a second drive shaft 6,

Control device 7, first power module 71, second power module 72, controller 73.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

A washing machine 100 according to an embodiment of the first aspect of the present invention will now be described with reference to Figs.

As shown in FIG. 1, a washing machine 100 according to an embodiment of the first aspect of the present invention includes an inner tub 2, a pulsator 3, and a driving device 4.

Specifically, the pulsator 3 is disposed at the bottom of the inner tub 2, and the pulsator 3 is rotatable relative to the inner tub 2; the driving device 4 includes a reluctance rotor 42 having an annular shape, a permanent magnet rotor 43 and a stator 41, and the stator 41 and the reluctance rotor 42 And the permanent magnet rotor 43 is sequentially nested inside and outside, that is, the reluctance rotor 42 is always located between the stator 41 and the permanent magnet rotor 43, the stator 41 may be located inside the reluctance rotor 42 and the permanent magnet rotor 43 is located outside the reluctance rotor 42. Or the stator 41 is located outside the reluctance rotor 42 and the permanent magnet rotor 43 is located inside the reluctance rotor 42. And the stator 41, the reluctance rotor 42 and the permanent magnet rotor 43 are rotatable with each other, and each adjacent one of the stator 41, the reluctance rotor 42 and the permanent magnet rotor 43 is spaced by an air gap, that is, the stator 41 is spaced apart from the reluctance rotor 42 by an air gap, and the reluctance rotor 42 and the permanent magnet rotor 43 are also spaced apart by an air gap to ensure rotational independence between the stator 41, the reluctance rotor 42, and the permanent magnet rotor 43. Sex.

The stator 41 may include a stator core 411, a first winding 412, and a second winding 413, wherein the stator core 411 is made of a highly magnetically permeable material, and the first winding 412 and the second winding 413 are both wound around the stator core 411. Upper and first winding The 412 and the second winding 413 are independent of each other, that is, the first winding 412 and the second winding 413 do not interfere with each other, interfere with each other, and operate completely independently. For example, the first winding 412 and the second winding 413 are respectively controlled by two independent power modules (such as the first power module 71 and the second power module 72 described hereinafter).

And the first winding 412 and the second winding 413 correspond to the reluctance rotor 42 and the permanent magnet rotor 43, respectively, to independently drive the reluctance rotor 42 and the permanent magnet rotor 43 to rotate. For example, the second winding 413 corresponds to the permanent magnet rotor 43 when the first winding 412 corresponds to the reluctor rotor 42, and the second winding 413 corresponds to the reluctance rotor 42 when the first winding 412 corresponds to the permanent magnet rotor 43. When different currents are applied to the first winding 412 and the second winding 413, the generated magnetic fields may act on the reluctance rotor 42 and the permanent magnet rotor 43, respectively, thereby driving the reluctance rotor 42 and the permanent magnet rotor 43 to rotate. The rotation of the inner tub 2 and the pulsator 3 is respectively driven.

Wherein one of the reluctance rotor 42 and the permanent magnet rotor 43 is fixedly connected to the inner tub 2 for driving the inner tub 2 to rotate, and the other of the reluctance rotor and the permanent magnet rotor 43 is fixedly connected with the pulsator 3, Used to drive the pulsator 3 to rotate. For example, when the reluctance rotor 42 is fixedly coupled to the inner tub 2 to drive the inner tub 2 to rotate, the permanent magnet rotor 43 and the pulsator 3 are fixedly coupled to drive the pulsator 3 to rotate; when the reluctance rotor 42 is fixedly coupled to the pulsator 3, the drive pulsator 3 is rotated. At the time, the permanent magnet rotor 43 is fixedly coupled to the inner tub 2 to drive the inner tub 2 to rotate. That is to say, the magnetic group rotor and the permanent magnet rotor 43 are respectively used for driving the inner tub 2 and the pulsator 3 to rotate independently, whereby the double-power washing and dehydrating of the washing machine 100 can be realized by means of no clutch, and the system integration is high and energy consumption is achieved. Low, high cleaning ratio, and low mechanical parts and high reliability.

The washing machine 100 according to the embodiment of the invention realizes dual-power washing and dehydration by means of no mechanical differential and no clutch, high system integration, low energy consumption, high cleaning ratio, and reliability due to mechanical parts reduction. Huge improvements. In addition, the driving device 4 uses the magnetoresistive modulation effect to generate driving torque, and the torque density is higher than that of the conventional permanent magnet motor, further increasing the power density of the system and reducing the energy consumption.

Further, any one of the first winding 412 and the second winding 413 may be a single-phase winding or a multi-phase winding, and the number of phases of the first winding 412 and the second winding 413 are the same or different, and thus, according to actual needs The number of phases of the first winding 412 and the second winding 413 is selected to improve the applicability of the stator 41.

Advantageously, when the stator 41 is located outside the reluctance rotor 42, the stator core 411 may further include a stator casing 414, the stator casing 414 is sleeved on the outer side of the stator core 411, and the stator casing 414 may be opposite to the stator core. The 411 has the effect of protection and insulation, thereby improving the safety and reliability of the driving device 4 during operation.

In some embodiments, the reluctance rotor 42 may include a magnetically permeable reluctance core 421 and a non-magnetically permeable spacer block 4222, and the reluctance core 421 and the spacer block 4222 are alternately arranged in a ring shape. Thereby, the structure of the reluctance rotor 42 can be simplified, and it is easy to manufacture.

Further, the reluctance rotor 42 may further include: a non-magnetically-conductive cage 422 and an end plate 423, wherein the cage 422 is open at both ends (for example, the upper end and the lower end of the cage 422 shown in FIG. 1) a plurality of mounting slots 4221 are formed on the peripheral wall of the retainer 422. The plurality of mounting slots 4221 are arranged along the circumferential direction of the retainer 422, and the adjacent mounting slots are formed. The non-magnetically-transferred spacer block 4222 is defined between the 4221, whereby the structure of the reluctance rotor 42 can be further simplified, and the number of parts can be reduced. Advantageously, the end plate 423 encloses one end of the retainer 422 (such as the lower end of the retainer 422 shown in FIG. 1), the reluctance core 421 is disposed within the mounting slot 4221, and the reluctance core 421 can include and be mounted A plurality of 4221 one-to-one correspondences can thereby facilitate the mounting of the magnetoresistive core 421, enhance the integrity of the reluctance rotor 42, and improve assembly efficiency.

In some embodiments, the permanent magnet rotor 43 may include: a magnetically conductive permanent magnet core 431 and a permanent magnet 432, the permanent magnet 432 may include a plurality of, and the plurality of permanent magnets 432 are arranged along a circumferential interval of the permanent magnet core 431, and The polarities of the adjacent two permanent magnets 432 are opposite, thereby facilitating the rotation of the permanent magnet rotor 43 by the permanent magnet rotor 43 and the stator 41 by electromagnetic induction.

In some embodiments, as shown in Figures 1 and 2, the washing machine 100 can include a first drive shaft 5 and a second drive shaft 6, wherein one of the first drive shaft 5 and the second drive shaft 6 (e.g. The second transmission shaft 6) may be a hollow shaft and the other is disposed inside the one, and the center line of the first transmission shaft 5 coincides with the center line of the second transmission shaft 6. For example, when the second transmission shaft 6 is a hollow shaft, the first transmission shaft 5 is disposed inside the second transmission shaft 6, wherein one end of the first transmission shaft 5 (for example, the first transmission shaft 5 shown in FIG. 2) The upper end is connected to the pulsator 3, and the other end of the first transmission shaft 5 (for example, the lower end of the first transmission shaft 5 shown in FIG. 2) and one of the reluctance rotor 42 and the permanent magnet rotor 43 (for example, The reluctance rotor 42) shown in Fig. 2 is connected, one end of the second transmission shaft 6 (e.g., the upper end of the second transmission shaft 6 shown in Fig. 2) is connected to the inner tub 2, and the other end of the second transmission shaft 6 is connected. (for example, the lower end of the second transmission shaft 6 shown in Fig. 2) is connected to one of the reluctance rotor 42 and the permanent magnet rotor 43 located inside (for example, the permanent magnet rotor 43 shown in Fig. 2). At this time, the reluctance rotor 42 and the permanent magnet rotor 43 respectively drive the inner tub 2 and the pulsator 3 to rotate through the first propeller shaft 5 and the second propeller shaft 6, so that it can be controlled without using mechanical differential speed. Direct dual power wash and dewatering.

In some embodiments, the reluctance rotor 42 may include a high magnetic permeability reluctance core 421 and a non-magnetically permeable spacer block 4222. The reluctance core 421 and the spacer block 4222 are alternately arranged in a ring shape, and the reluctance core 421 is The number is p _r , the winding span of the first winding 412 is y _1s , and the first winding 412 forms a rotating magnetic field with a pole pair number p _s , the winding span of the second winding 413 is y _1ad , and the second winding 413 A rotating magnetic field having a pole logarithm of p _ad is formed, and the permanent magnet rotor 43 forms a permanent magnetic field having a pole logarithm of p _f , where p _r =|p _s ±p _f |; p _ad =p _f ≠p _s ;y _1s ≠y _1ad .

Further, the current injection frequencies of the first winding 412 and the second winding 413 may respectively satisfy: ω _s = p _r Ω _r - p _f Ω _f ; ω _ad = p _f Ω _f , where ω _s and ω _ad are respectively The control frequencies of one winding 412 and the second winding 413, Ω _r and Ω _f are the mechanical rotational speeds of the reluctance rotor 42 and the permanent magnet rotor 43, respectively, and the current injection phase angles of the first winding 412 and the second winding 413 respectively satisfy: θ _s =-p _r θ _r +p _f θ _f ; θ _ad =-p _f θ _f , where θ _s and θ _ad are the phase angles of the injection current axes of the two sets of windings, and θ _f and θ _r are permanent magnet rotors, respectively 43 and the mechanical angular difference between the reluctance rotor 42 and the d-axis aligned position. Thereby, decoupling control of the permanent magnet rotor 43 and the reluctance rotor 42 is advantageously achieved.

The following describes a control method of the washing machine 100 according to the above-described embodiment of the present invention. The control method includes: in the washing mode, the pulsator 3 and the inner tub 2 are rotated in opposite directions or in the same direction but at different speeds; in the dehydrating mode, the pulsator 3 rotates in the same direction as the inner tub 2 and rotates at the same speed.

The washing machine 100 may further include a control device 7 including a first power module 71, a second power module 72, and a controller 73, wherein the first power module 71 and the second power module 72 are respectively associated with the first The number of phases of the winding 412 and the second winding 413 are matched, and the controller 73 controls the first power module 71 and the second power module 72 to pass the first winding 412 and the second winding 413 according to the washing step by analyzing and collecting signals. A suitable current is drawn to achieve the purpose of controlling the rotational speed of the pulsator 3 and the inner tub 2. When in the washing mode, the controller 73 controls the driving device 4 according to the dual power washing mode, that is, the control effect is that the reluctance rotor 42 and the permanent magnet rotor 43 rotate in opposite directions, thereby driving the pulsator 3 and the inner tub 2 to rotate in opposite directions, respectively. In the dehydration mode, the control effect of the controller 73 is that the reluctance rotor 42 and the permanent magnet rotor 43 are operated at the same speed in the same direction, respectively, and the pulsator 3 and the inner tub 2 are driven at the same speed in the same direction to perform drying. .

A washing machine 100 according to an embodiment of the present invention will now be described with reference to Figs.

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the washing machine 100 of the embodiment of the present invention includes an outer tub 1 , an inner tub 2 , a pulsator 3 , a driving device 4 and a control device 7 of the washing machine 100 , and the driving device 4 includes a stator. 41. A reluctance rotor 42, a permanent magnet rotor 43, a first transmission shaft 5 and a second transmission shaft 6.

Specifically, the stator 41 includes: a stator casing 414, a stator core 411 made of a high magnetic permeability material, and a first winding 412 and a second winding 413 wound thereon, the first winding 412 being three-phase symmetrical Winding, the second winding 413 is two symmetrical windings. As shown in FIG. 4, the control device 7 includes a first power module 71 and a second power module 72 that are independent of each other, the first power module 71 and the second power. The module 72 is for controlling the input currents of the first winding 412 and the second winding 413, respectively, and the control signals of the first power module 71 and the second power module 72 are generated by the controller 73.

The reluctance rotor 42 includes a bulk magnetoresistive core 421 made of a high magnetic permeability material, a cage 422 made of a non-magnetic material, and an end plate 423 of the reluctance rotor 42. In the embodiment, the first transmission The shaft 5 is fixedly coupled to the end plate 423 of the reluctance rotor 42. The permanent magnet rotor 43 includes a permanent magnet 432 and a permanent magnet core 431 made of a highly magnetically permeable material. In the embodiment, the second transmission shaft 6 is fixedly coupled to the permanent magnet core 431, and the second transmission shaft 6 is a hollow shaft. And the second transmission shaft 6 is coaxially arranged with the first transmission shaft 5, and the second transmission shaft 6 is fixedly connected with the inner tub 2 of the washing machine 100, and the first transmission shaft 5 is fixedly connected with the pulsator 3, therefore, the The permanent magnet rotor 43 drives the inner tub 2 to rotate, and the reluctance rotor 42 drives the pulsator 3 to rotate. The outer tub 1 is fixed, and the stator casing 414 is fixed on the outer tub 1.

The control method of the washing machine 100 of the above embodiment of the present invention is as shown in FIG. 6. When the washing machine 100 starts to wash, the weight and center of gravity of the laundry are first obtained through an intelligent identification program, and a suitable washing program is selected according to the user's input. After starting the washing, the controller 73 acquires the rotational speed and position of the permanent magnet rotor 43 and the reluctance rotor 42 in real time, and calculates the first winding 412 and the second winding injected through the first power module 71 and the second power module 72 according to the following formula. The frequency and phase angle of the current of 413. In the present embodiment, the number of reluctance cores 421 is p _r = 14, the number of pole pairs of the rotating magnetic field formed by the first winding 412 is p _s = 8, and the number of pole pairs of the permanent magnet magnetic field formed by the permanent magnet rotor p _f =6, the pole pair of the rotating magnetic field formed by the second winding 413 is p _ad = 6.

ω _s =p _r Ω _r -p _f Ω _f

ω _ad =p _f Ω _f

θ _s =-p _r θ _r +p _f θ _f

θ _ad =-p _f θ _f

Where ω _s and ω _ad are the control frequencies of the first winding 412 and the second winding 413, respectively, and Ω _r and Ω _f are the mechanical rotational speeds of the reluctance rotor 42 and the permanent magnet rotor 43, respectively, the first winding 412 and the first The current injection phase angle of the two windings 413: θ _ad and θ _ad are the phase angles of the injection current axes of the first winding 412 and the second winding 413, and θ _f and θ _r are the alignment of the permanent magnet rotor 43 and the reluctance rotor 42 respectively. The mechanical angle difference of the shaft position.

Since the first winding 412 and the second winding 413 are independently controlled, the rotational direction and position of the permanent magnet rotor 43 and the reluctance rotor 42 can be independently controlled because the pulsator 3 and the inner barrel 2 of the washing machine 100 are also rotated. It can be controlled independently without the need of a clutch. As shown in FIG. 3, in the washing mode, the pulsator 3 and the inner tub 2 are moved in opposite rotational directions to achieve dual-power rinsing, and in the dehydrated state, as shown in FIG. The pulsator 3 and the inner tub 2 are rotated at the same speed in the same direction, thereby achieving dehydration of the laundry.

The washing machine 100 according to the embodiment of the present invention adopts a structure of a novel coaxial driving device 4 and a control method thereof, and is capable of realizing magnetic control by controlling the first winding 412 and the second winding 413 without using a mechanical clutch. The resistance rotor 42 and the permanent magnet rotor 43 are independently controlled, and then the dual power washing of the pulsator 3 and the inner tub 2 is reversed as needed, or the pulsator 3 and the inner tub 2 are rotated in the same direction. The system has compact structure, high reliability and low noise, and comprehensively improves the performance of the existing dual-powered wave washing machine 100.

The washing machine 100 according to the embodiment of the invention realizes dual-power washing and dehydration by means of no mechanical differential and no clutch, high system integration, low energy consumption, high cleaning ratio, and reliability due to mechanical parts reduction. The invention is greatly improved; the invention uses the magnetoresistive modulation effect to generate driving torque, and the torque density is higher than that of the conventional permanent magnet motor, further increasing the power density of the system and reducing the energy consumption.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Out, Clockwise, Counterclockwise, Axial The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of describing the present invention and simplifying the description, and does not indicate or imply the indicated device or The component must have a specific orientation to The specific orientation and operation are not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical connection, electrical connection, or communication; can be directly connected, or indirectly connected through an intermediate medium, can be the internal connection of two components or the interaction of two components . For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims

A washing machine, comprising:

Outer bucket

An inner tub, the inner tub being rotatably disposed in the outer tub;

a pulsator, the pulsator is rotatably disposed at a bottom of the inner tub relative to the inner tub;

a driving device comprising a ring-shaped reluctance rotor, a permanent magnet rotor and a stator, the stator, the reluctance rotor and the permanent magnet rotor being sequentially nested inside and outside and mutually rotatable, and the stator, The reluctance rotor and each adjacent two of the permanent magnet rotors are spaced by an air gap, the stator comprising: a stator core, a first winding and a second winding, the first winding and the The second winding is wound on the stator core, and the first winding and the second winding are independent of each other, and the first winding and the second winding are respectively connected to the reluctance rotor and the The permanent magnet rotor corresponds to respectively drive the reluctance rotor and the permanent magnet rotor to rotate independently,

Wherein one of the reluctance rotor and the permanent magnet rotor is fixedly coupled to the inner tub for driving the inner tub to rotate, and the other of the reluctance rotor and the permanent magnet rotor The pulsator is relatively fixedly coupled for driving the pulsator to rotate.
The washing machine according to claim 1, wherein either one of the first winding and the second winding is a single-phase winding or a multi-phase winding, and the first winding and the second winding The phases are the same or different.
The washing machine according to claim 1 or 2, wherein the stator core further comprises a stator casing, and the stator casing is sleeved outside the stator core.
The washing machine according to any one of claims 1 to 3, wherein the reluctance rotor comprises a magnetized magnetoresistive core and a non-magnetically-transferred spacer, the reluctance core and the spacer The blocks are alternately arranged in a ring shape.
The washing machine according to claim 4, wherein the reluctance rotor further comprises:

a non-magnetically-conductive cage having a cylindrical shape with both ends open, and a peripheral wall of the retainer is formed with a plurality of mounting grooves arranged along a circumferential interval of the retainer;

An end plate that closes one end of the cage,

The reluctance iron core is disposed in the mounting groove and includes a plurality of one-to-one corresponding to the mounting groove.
The washing machine according to any one of claims 1 to 5, wherein the permanent magnet rotor comprises: a magnetically conductive permanent magnet core and a permanent magnet, the permanent magnet including a circumferential direction of the permanent magnet core A plurality of spaced apart, and two adjacent permanent magnets have opposite polarities.
The washing machine according to any one of claims 1 to 4, wherein the washing machine comprises a first transmission shaft and a second transmission shaft, the second transmission shaft is a hollow shaft, and the first transmission shaft is provided In the second drive shaft The inner side of the first transmission shaft and the center line of the second transmission shaft coincide,

Wherein one end of the first transmission shaft is connected to the pulsator and the other end is connected to one of the reluctance rotor and the permanent magnet rotor, and one end of the second transmission shaft and the inner barrel Connected and the other end is connected to one of the reluctance rotor and the permanent magnet rotor located inside.
A washing machine according to any one of claims 2 to 7, wherein the reluctance rotor comprises a magnetized magnetoresistive core and a non-magnetically-transferred spacer, the reluctance core and the spacer The blocks are alternately arranged in a ring shape, the number of the magnetoresistive cores is p r , the winding spans of the first winding and the second winding are y 1s and y 1ad , respectively, and the pole pairs are respectively p s and a rotating magnetic field of p ad , the permanent magnet rotor forming a permanent magnetic field having a pole logarithm of p f

Where p r =|p s ±p f |; p ad =p f ≠p s ;y 1s ≠y 1ad .
The washing machine according to claim 8, wherein current injection frequencies of said first winding and said second winding respectively satisfy: ω s = p r Ω r - p f Ω f ; ω ad = p f Ω f , where ω s and ω ad are the control frequencies of the two sets of windings, respectively, and Ω r and Ω f are the mechanical speeds of the reluctance rotor and the permanent magnet rotor, respectively.

The current injection phase angles of the first winding and the second winding respectively satisfy: θ s = - p r θ r + p f θ f ; θ ad = -p f θ f , where θ s and θ ad are two The phase angles of the injection current axes of the windings, θ f and θ r are the mechanical angular differences between the permanent magnet rotor and the reluctance rotor aligned with the d-axis, respectively.
A control method of a washing machine according to any one of claims 1 to 9, wherein the control method comprises:

In the washing mode, the pulsator rotates opposite to or in the same direction but at different speeds;

In the dehydration mode, the pulsator rotates in the same direction and at the same speed as the inner tub.