CN210111887U - Motor system and washing machine - Google Patents
Motor system and washing machine Download PDFInfo
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- CN210111887U CN210111887U CN201921232295.XU CN201921232295U CN210111887U CN 210111887 U CN210111887 U CN 210111887U CN 201921232295 U CN201921232295 U CN 201921232295U CN 210111887 U CN210111887 U CN 210111887U
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Abstract
The application provides a motor system and a washing machine, wherein the motor system comprises a permanent magnet synchronous reluctance motor; a driver for driving a permanent magnet synchronous reluctance motor, the driver comprising: the device comprises a power supply module, a driving module, a signal acquisition module and a control chip, wherein the power supply module is respectively connected with the driving module and the control chip, the driving module is connected with the permanent magnet synchronous reluctance motor, and the signal acquisition module is connected with the control chip. The motor system is low in cost and excellent in high-speed loading capacity.
Description
Technical Field
The application relates to the technical field of washing machines, in particular to a motor system and a washing machine.
Background
The washing machine is one of important household appliances for solving the daily washing demand. The motor driving system is a core power component of the washing machine, and the performance level of the motor driving system directly influences the washing, dewatering and special function effects of the whole machine. At present, the driving motor of the washing machine mainly adopts three types of series motor, asynchronous motor and permanent magnet synchronous motor.
Among them, the permanent magnet synchronous motor is gradually widely used due to its advantages of simple structure, small size and high efficiency. However, when a high speed is applied to a large eccentric load, a protection mechanism such as current limitation is applied, and the increase of the rotational speed is limited, and the high speed load carrying capability is limited.
SUMMERY OF THE UTILITY MODEL
The application provides a motor system and a washing machine, which are used for solving the problem that a permanent magnet synchronous motor driving system in the related art is limited in high-speed loading capacity.
An embodiment of an aspect of the present application provides an electric machine system, including:
a permanent magnet synchronous reluctance motor;
a driver for driving the permanent magnet synchronous reluctance motor, the driver comprising: the device comprises a power supply module, a driving module, a signal acquisition module and a control chip, wherein the power supply module is respectively connected with the driving module and the control chip, the driving module is connected with the permanent magnet synchronous reluctance motor, and the signal acquisition module is connected with the control chip.
The motor system comprises the permanent magnet synchronous reluctance motor and a driver for driving the permanent magnet synchronous reluctance motor, and is low in cost and excellent in high-speed loading capacity.
In another embodiment of the present application, a washing machine is further provided, and the washing machine includes the motor system according to the above embodiment.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an electric machine system according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another motor system provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a permanent magnet synchronous reluctance motor according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The motor and the motor system of the embodiments of the present application are described below with reference to the drawings.
The embodiment of the application provides a motor system. Fig. 1 is a schematic structural diagram of an electric machine system according to an embodiment of the present application.
As shown in fig. 1, the motor system includes: a permanent magnet synchronous reluctance machine 100 and a drive 200.
Wherein, the driver 200 drives the permanent magnet synchronous reluctance motor 100 to operate. The rotor of the permanent magnet synchronous reluctance motor 100 is specially designed, a symmetrical multi-layer hollow design is added to the radial direction of the rotor, and the permanent magnet synchronous reluctance motor has the advantages of high torque density, high power factor, excellent speed regulation performance and the like.
Among them, the driver 200 may include: the device comprises a power supply module 210, a driving module 220, a signal acquisition module 230 and a control chip 240.
Specifically, the power supply module 210 is connected to the driving module 220 and the control chip 240, the driving module 220 is connected to the permanent magnet synchronous reluctance motor 100, and the signal acquisition module 230 is connected to the control chip 240.
The power supply module 210 is configured to supply power to the driving module 220, the signal acquisition module 230 acquires a signal, for example, a voltage signal output by the power supply module 210 to the driving module 220 is sent to the control chip 240, the control chip 240 outputs a control signal to the driving module 220 according to the signal acquired by the signal acquisition module 240, and the driving module 220 drives the permanent magnet synchronous reluctance motor 100 to rotate or adjust a rotation speed according to the control signal.
Fig. 2 is a schematic structural diagram of another motor system provided in an embodiment of the present application.
In one embodiment of the present application, as shown in fig. 2, the power supply module 210 includes: a unidirectional rectifier bridge 211; the driving module 220 includes: a three-phase inverter bridge 221 and a drive amplifier 222.
The unidirectional rectifier bridge 211 is used for rectifying alternating current to obtain direct current, the direct current side of the unidirectional rectifier bridge 211 is connected with a three-phase inverter bridge 221, the three-phase inverter bridge 221 is respectively connected with the drive amplifier 123 and the permanent magnet synchronous reluctance motor 110, the control chip 240 is connected with the drive amplifier 222, the control chip 240 generates a control signal according to the signal acquired by the signal acquisition module 230 and inputs the control signal to the drive amplifier 222, and the drive amplifier 222 drives the three-phase inverter bridge 221 according to the control signal to adjust the rotating speed and the torque of the permanent magnet synchronous reluctance motor 100.
In this embodiment, the three-phase inverter bridge 221 is connected to the three-phase winding of the permanent magnet synchronous reluctance motor 100, the driving amplifier 222 may adopt a Pulse Width Modulation (PWM) driving amplifying circuit, and the control chip 240 may be a data signal processor.
In one embodiment of the present application, as shown in fig. 2, the signal acquisition module 230 may include a bus voltage detector 231, a phase current detector 232, and a phase voltage detector 233.
The bus voltage detector 231 is connected with the unidirectional rectifier bridge 211 and the control chip 240, the phase current detector 232 is respectively connected with the three-phase inverter bridge 221 and the control chip 240, and the phase voltage detector 233 is also connected with the three-phase inverter bridge 221 and the control chip 240.
In the present embodiment, the bus voltage detector 231, the phase current detector 232, and the phase voltage detector 233 perform sampling, respectively, and specifically, as shown in fig. 2, the bus voltage detector 211 performs sampling on the single-phase rectifier bridge 211 output voltage UdcSampling, the phase current detector 232 outputs the current i to the three-phase inverter bridge 221a、ibSampled, phase voltage detector 233 measures voltage ucSampling is carried out, then the sampling value is input into the control chip 240, the control chip 240 carries out control algorithm calculation, a PWM control instruction is output according to the calculation result, six control signals from PWM1 to PWM6 are generated through a PWM driving amplification circuit and input into the three-phase inverter bridge 221, and the three-phase inverter bridge 221 is driven to adjust the rotating speed and the torque of the permanent magnet synchronous reluctance motor 100.
In one embodiment of the present application, as shown in fig. 2, the power supply module 210 further includes a power conversion circuit 212.
The power conversion circuit 212 is connected to the unidirectional rectifier bridge 211 and the control chip 240, and the current conversion circuit 212 is connected to the dc side of the unidirectional rectifier bridge 211, converts the dc power obtained from the unidirectional rectifier bridge 211, and then supplies power to the control chip 240 and other circuits.
In one embodiment of the present application, as shown in FIG. 2, the drive 200 may further include an upper computer 250.
Wherein, the upper computer 250 is connected to the control chip 240.
As an implementation manner, the control chip 240 includes a UART serial port communication interface, maintains UART serial port communication with the upper computer 2250, receives a control instruction from the upper computer, and returns real-time information of the driver.
The motor system of the embodiment of the application can be applied to household appliances using motors or compressors, such as dish-washing machines, refrigerators, air conditioners, range hoods and the like.
In an embodiment of the present application, a structure of the permanent magnet synchronous reluctance motor 100 may be as shown in fig. 3, where fig. 3 is a schematic structural diagram of a permanent magnet synchronous reluctance motor according to an embodiment of the present application.
As shown in fig. 3, the permanent magnet synchronous reluctance motor 100 includes: a stator 110, a rotor 120, and a plurality of pairs of magnetic barrier groups 130 disposed over the rotor.
Wherein each pair of magnetic barrier groups 130 comprises a multilayer magnetic barrier structure, in fig. 3, each permanent magnet synchronous reluctance machine 100 comprises 4 pairs of magnetic barrier groups, and each pair of magnetic barrier groups 130 comprises 3 layers of magnetic barrier structures, thereby adding a symmetrical multilayer magnetic barrier structure in the radial direction of the rotor 120. The magnetic barrier structure uses fewer magnets, and the cost of the motor is reduced.
The permanent magnet synchronous reluctance motor provided by the embodiment of the application has the advantages of high torque density and high power factor based on the symmetrical multilayer magnetic barrier structure in the radial direction of the rotor, and is excellent in high-speed load carrying capacity.
In one embodiment of the present application, as shown in fig. 3, the magnetic barrier structure includes: a groove disposed on the rotor, a plurality of permanent magnets 140 disposed in the groove, wherein the plurality of permanent magnets 140 have gaps 150 therebetween. Therefore, the plurality of permanent magnets are arranged in the groove at intervals, gaps are reserved among the plurality of permanent magnets, and a magnetic barrier structure is formed.
Because gaps are formed among the permanent magnets 140, the amount of the permanent magnets used by the magnetic barrier structure is small, and the cost of the motor is reduced. And moreover, the permanent magnets are embedded into the grooves, so that the occupied volume of the permanent magnets is reduced, the appearance integrity is improved, the appearance size of the motor is close to that of the existing permanent magnet synchronous motor, the installation mode and the positioning of the whole motor are not required to be adjusted, and the universality is good.
In one embodiment of the present application, the number of pairs of the magnetic barrier groups is related to the number of pole pairs of the permanent magnet synchronous reluctance motor, the number of pairs of the magnetic barrier groups in fig. 3 is 4, and the number of pole pairs of the motor is 2, i.e. the number of pairs of the magnetic barrier groups is 2 times the number of pole pairs of the motor.
In one embodiment of the present application, each pair of barrier groups may include 2-4 layers of barrier structures, and each pair of barrier groups in the motor shown in fig. 3 includes 3 layers of barrier structures.
The motor provided by the embodiment of the application has the advantages of high torque density, high power factor, excellent speed regulation performance and the like, only a small number of permanent magnets are used on the rotor side, the motor is low in cost and excellent in high-speed loading capacity, and the performance of the whole motor is effectively enhanced while the cost is reduced. And the appearance size of the motor is similar to that of the existing permanent magnet synchronous motor, the installation mode and the positioning of the whole motor do not need to be adjusted, and the universality is good.
The embodiment of the application also provides a washing machine, which comprises the motor system. That is, the above-described motor system is applied to a washing machine.
In the related art, when a large eccentric load is subjected to high speed, a protection mechanism such as current limitation is carried out, so that the rotation speed is limited to rise, and the whole machine vibrates violently and has high noise due to the fact that the whole machine is in an unstable acceleration state for a long time. In the washing machine in the embodiment, the used permanent magnet synchronous reluctance motor has the advantages of high torque density, high power factor, excellent speed regulation performance and the like, and the used motor system has the advantages of low cost, excellent high-speed loading capacity and low noise, so that the overall performance of the washing machine can be improved while the cost is reduced.
It should be noted that the motor system can also be applied to other electric appliances requiring a motor, such as a dishwasher, an air conditioner, and the like.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. An electric machine system, comprising:
a permanent magnet synchronous reluctance motor;
a driver for driving the permanent magnet synchronous reluctance motor, the driver comprising: the device comprises a power supply module, a driving module, a signal acquisition module and a control chip, wherein the power supply module is respectively connected with the driving module and the control chip, the driving module is connected with the permanent magnet synchronous reluctance motor, and the signal acquisition module is connected with the control chip.
2. The electric machine system of claim 1, wherein the power module comprises: a unidirectional rectifier bridge; the driving module includes: a three-phase inverter bridge and a drive amplifier;
the three-phase inverter bridge is connected between the unidirectional rectifier bridge and the permanent magnet synchronous reluctance motor; the three-phase inverter bridge is connected with the drive amplifier;
the driving amplifier is connected with the control chip.
3. The electric machine system of claim 2, wherein the signal acquisition module comprises:
the bus voltage detector is connected with the unidirectional rectifier bridge and the control chip;
and the phase current detector and the phase voltage detector are connected with the three-phase inverter bridge and the control chip.
4. The electric machine system of claim 2, wherein the power module further comprises:
and the power supply conversion circuit is connected with the unidirectional rectifier bridge and the control chip.
5. The motor system of claim 1, wherein the drive further comprises:
and the upper computer is connected with the control chip.
6. The electric machine system of claim 2, wherein the drive amplifier is a PWM drive amplifier.
7. The electric machine system of claim 1, wherein the permanent magnet synchronous reluctance electric machine comprises:
a stator;
a rotor; and
a plurality of pairs of magnetic barrier groups disposed over the rotor, wherein each pair of magnetic barrier groups comprises a multilayer magnetic barrier structure.
8. The electric machine system of claim 7, wherein the magnetic barrier structure comprises:
a groove disposed over the rotor;
a plurality of permanent magnets disposed within the groove, wherein the plurality of permanent magnets have a gap therebetween.
9. The electric machine system of claim 7, wherein the number of pairs of groups of magnetic barriers is related to the number of pole pairs of the permanent magnet synchronous reluctance machine.
10. A washing machine, characterized by comprising: an electric motor system as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921232295.XU CN210111887U (en) | 2019-07-31 | 2019-07-31 | Motor system and washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921232295.XU CN210111887U (en) | 2019-07-31 | 2019-07-31 | Motor system and washing machine |
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| Publication Number | Publication Date |
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| CN210111887U true CN210111887U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921232295.XU Active CN210111887U (en) | 2019-07-31 | 2019-07-31 | Motor system and washing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108245A (en) * | 2020-08-27 | 2022-03-01 | 无锡小天鹅电器有限公司 | Washing machine, driving board thereof, control method and storage medium |
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2019
- 2019-07-31 CN CN201921232295.XU patent/CN210111887U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108245A (en) * | 2020-08-27 | 2022-03-01 | 无锡小天鹅电器有限公司 | Washing machine, driving board thereof, control method and storage medium |
| CN114108245B (en) * | 2020-08-27 | 2023-11-24 | 无锡小天鹅电器有限公司 | Washing machine, driving plate thereof, control method thereof and storage medium |
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