CN109487498B - Motor control method and device of washing equipment and washing equipment - Google Patents
Motor control method and device of washing equipment and washing equipment Download PDFInfo
- Publication number
- CN109487498B CN109487498B CN201811367710.2A CN201811367710A CN109487498B CN 109487498 B CN109487498 B CN 109487498B CN 201811367710 A CN201811367710 A CN 201811367710A CN 109487498 B CN109487498 B CN 109487498B
- Authority
- CN
- China
- Prior art keywords
- motor
- rotating speed
- speed
- threshold value
- braking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/30—Driving arrangements
- D06F37/304—Arrangements or adaptations of electric motors
-
- D06F37/203—
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
According to the motor control method and device for the washing equipment and the washing equipment provided by the embodiment of the invention, when the motor of the washing equipment starts to reduce the speed, the rotating speed of the motor is controlled to reduce to the threshold value at a constant speed, and the rotating speed of the motor is reduced to zero at a high speed in a motor braking mode. Through the technical means, the reduction speed of the rotating speed is accelerated through braking after the rotating speed is reduced to the threshold value, the phenomenon that the washing equipment roller collides the barrel and is displaced due to the fact that the washing equipment roller passes through the resonance area of the suspension system for a long time is avoided, the time consumed by reduction is short, the motor is re-braked after the rotating speed is reduced to be close to the resonance speed, the generated noise is low, and the user experience is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of motor control, in particular to a motor control method and device of washing equipment and the washing equipment.
Background
When the current washing equipment carries out dewatering speed reduction, the generally adopted mode comprises the following steps: 1. the rotating speed of a motor of the washing equipment is reduced according to a certain deceleration, the speed reduction is very slow and long in time consumption, and if the difference of the moisture content of the dehydrated clothes is large and the difference of the water loss rate is large, the eccentricity is very large due to the difference of the moisture content of the clothes after the clothes are dehydrated in the speed reduction process, so that the phenomenon that a barrel is collided and displaced is caused when a roller of the washing equipment passes through a resonance area of a suspension system of the washing equipment for a long time; 2. the speed reduction is carried out by controlling the way of sudden braking of the motor, and although the speed reduction can quickly pass through the resonance area of the suspension system of the drum washing equipment, the life quality of people is affected because the brake can generate long-term noise.
Disclosure of Invention
In order to solve the problem that the motor of the washing equipment is slow to brake. The embodiment of the invention provides a motor control method and device of washing equipment and the washing equipment, and solves the technical problem of high noise.
In view of the above, in a first aspect, an embodiment of the present invention provides a motor control method for a washing apparatus, including:
when a motor of washing equipment starts to reduce the speed, acquiring the current rotating speed of the motor;
controlling the rotating speed of the motor to reduce at a constant speed according to a preset acceleration;
judging whether the current rotating speed of the motor is higher than a threshold value, wherein the threshold value is lower than the rotating speed of the motor when the motor starts to reduce the speed and is larger than zero;
and if the current rotating speed is not higher than the threshold value, braking the motor.
Optionally, the threshold is a rotation speed value greater than a resonance rotation speed of the motor.
Optionally, before determining whether the current rotation speed of the motor is higher than the threshold, the method further includes:
detecting the quality of clothes in the washing equipment;
acquiring the rigidity of a suspension system of the washing equipment;
acquiring a motor compensation rotating speed value corresponding to the mass;
calculating the resonance rotating speed of the motor according to the mass and the rigidity;
and calculating the threshold value according to the resonance rotating speed and the motor compensation rotating speed value.
Optionally, the threshold is calculated according to the resonance rotation speed and the motor compensation rotation speed value according to the following formula:
in the formula, nNear toA threshold value is indicated which is indicative of,
representing the resonant speed of the motor, k representing the stiffness of the suspension system of the washing apparatus, M representing the mass of the laundry inside the washing apparatus, nMAnd the motor compensation rotating speed value corresponding to the mass M is represented.
Optionally, braking the motor, comprises:
generating a braking instruction;
and sending the braking instruction to a braking device of the motor.
Optionally, the method further includes:
and if the current rotating speed is higher than the threshold value, controlling the rotating speed of the motor to continuously reduce at a constant speed according to a preset acceleration.
In a second aspect, an embodiment of the present invention provides a motor control device for a washing apparatus, including:
the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the current rotating speed of a motor of the washing equipment when the motor starts to reduce the speed;
the speed reduction module is used for controlling the rotating speed of the motor to reduce at a constant speed according to a preset acceleration;
the judging module is used for judging whether the current rotating speed of the motor is higher than a threshold value, wherein the threshold value is lower than the rotating speed of the motor when the motor starts to reduce the speed and is larger than zero rotating speed;
and the braking module is used for braking the motor when the current rotating speed is not higher than the threshold value.
Optionally, the control device further includes:
the quality detection module is used for detecting the quality of clothes in the washing equipment;
the rigidity acquisition module is used for acquiring the rigidity of a washing equipment suspension system;
the compensation value acquisition module is used for acquiring a compensation rotating speed value corresponding to the mass;
and the calculating module is used for calculating a threshold value according to the mass, the rigidity and the compensation rotating speed value.
Optionally, the calculating module calculates the threshold value according to the following formula:
in the formula, nNear toA threshold value is indicated which is indicative of,
representing the resonant speed of the motor, k representing the stiffness of the suspension system of the washing apparatus, M representing the mass of the laundry inside the washing apparatus, nMMotor compensation indicating mass M correspondenceAnd (5) compensating the rotating speed value.
Optionally, the brake module includes:
the command generating unit is used for generating a braking command;
and the command sending unit is used for sending the braking command to a braking device of the motor.
In a third aspect, an embodiment of the present invention further provides a washing apparatus, including the motor control device according to the second aspect.
Compared with the prior art, the motor control method for the washing equipment provided by the embodiment of the invention has the advantages that when the motor of the washing equipment starts to reduce the speed, the rotating speed of the motor is controlled to reduce to the threshold value at a constant speed, and then the rotating speed of the motor is reduced to zero rapidly in a motor braking mode. Through the technical means, the reduction speed of the rotating speed is accelerated through braking after the rotating speed is reduced to the threshold value, the phenomenon that the washing equipment roller collides the barrel and is displaced due to the fact that the washing equipment roller passes through the resonance area of the suspension system for a long time is avoided, the time consumed by reduction is short, the motor is re-braked after the rotating speed is reduced to be close to the resonance speed, the generated noise is low, and the user experience is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a flowchart of a motor control method for a washing apparatus according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a motor control device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Fig. 1 is a motor control method of a washing device according to an embodiment of the present invention, where the control method is applied to a motor of the washing device, and as shown in fig. 1, the motor control method includes:
s1, when a motor of washing equipment starts to reduce the speed, acquiring the current rotating speed of the motor;
the motor speed reduction means the reduction of the motor speed;
specifically, in the embodiment of the present application, the current rotation speed of the motor may be obtained by any one of the following methods, but is not limited to the following methods, and may be other methods:
(1) the light reflection method is that a white line is drawn on the rotating part of the motor, a strong beam of light is used for irradiation, a photoelectric element is used for detecting the reflection of light to form a pulse signal, and the pulse is counted in a certain time to convert the rotating speed of the motor.
(2) A magnetoelectric method: a magnet is fixed on a rotating part of the motor, a coil is arranged on the outer edge of the circumference of the movement track of the magnet, when the motor rotates, the coil can generate induced pulse voltage, pulses are counted within a certain time, and the rotating speed of the motor can be converted.
(3) A grating method: a disc is fixed on a motor rotating shaft, a light through groove can be arranged on the disc, a light emitting element and a light receiving element are arranged on two sides of the disc, when the motor rotates, the light receiving element is periodically illuminated to generate electric pulses, the pulses are counted within a certain time, and the rotating speed of the motor can be converted.
(4) Hall switch detection method: a magnet is fixed on a rotating part of the motor, a Hall switch is arranged on the outer edge of the circumference of the movement track of the magnet, the Hall switch periodically induces magnetic lines of force when the motor rotates to generate pulse voltage, and the pulse is counted within a certain time, so that the rotating speed of the motor can be converted.
S2, controlling the rotating speed of the motor to reduce at a constant speed according to a preset acceleration;
specifically, in the embodiment of the present application, a control system of the washing device controls a motor driving device to send a driving signal to a motor, and the control system controls the frequency of the driving signal to control the rotation speed of the motor.
S3, judging whether the current rotating speed of the motor is higher than a threshold value, wherein the threshold value is lower than the rotating speed of the motor when the motor starts to reduce the speed and is larger than zero rotating speed;
specifically, in the embodiment of the present application, the current rotation speed of the motor may be obtained by any one of the following methods, but is not limited to the following methods:
(1) the light reflection method is that a white line is drawn on the rotating part of the motor, a strong beam of light is used for irradiation, a photoelectric element is used for detecting the reflection of light to form a pulse signal, and the pulse is counted in a certain time to convert the rotating speed of the motor.
(2) A magnetoelectric method: a magnet is fixed on a rotating part of the motor, a coil is arranged on the outer edge of the circumference of the movement track of the magnet, when the motor rotates, the coil can generate induced pulse voltage, pulses are counted within a certain time, and the rotating speed of the motor can be converted.
(3) A grating method: a disc is fixed on a motor rotating shaft, a light through groove can be arranged on the disc, a light emitting element and a light receiving element are arranged on two sides of the disc, when the motor rotates, the light receiving element is periodically illuminated to generate electric pulses, the pulses are counted within a certain time, and the rotating speed of the motor can be converted.
(4) Hall switch detection method: a magnet is fixed on a rotating part of the motor, a Hall switch is arranged on the outer edge of the circumference of the movement track of the magnet, the Hall switch periodically induces magnetic lines of force when the motor rotates to generate pulse voltage, and the pulse is counted within a certain time, so that the rotating speed of the motor can be converted.
(5) And (3) calculation method: acquiring the rotating speed of the motor when the rotating speed of the motor begins to decrease, acquiring the time length of the decrease of the rotating speed of the motor, and calculating the current rotating speed according to the following formula:
rN＝r0-t·d
in the formula, rNRepresenting the current rotational speed, r, of the motor0The motor speed at which the motor speed starts to decrease is represented, t represents the time length of the decrease in the motor speed, and d represents the acceleration.
Specifically, in the embodiment of the present application, the threshold is the rotation speed of the motor when approaching the upper boundary of the resonance region of the suspension system of the washing device, and the threshold is greater than the resonance rotation speed of the motor of the washing device (the resonance rotation speed is the rotation speed corresponding to the resonance caused by the excitation frequency generated by the unbalanced force of the motor and the natural frequency of the motor and its support system), and the threshold is obtained by the following method:
detecting the quality of clothes in the washing equipment;
acquiring the rigidity of a suspension system of the washing equipment;
acquiring a compensation rotating speed value corresponding to the mass;
calculating the resonance rotating speed of the motor according to the mass and the rigidity;
and calculating a threshold value according to the resonance rotating speed and the compensation rotating speed value.
Specifically, the threshold is calculated as follows:
in the formula, nNear toA threshold value is indicated which is indicative of,
representing the resonant speed of the motor, k representing the stiffness of the suspension system of the washing apparatus, M representing the mass of the laundry inside the washing apparatus, nMThe compensation rotating speed value corresponding to the mass M is represented, and is calculated through a large number of washing equipment speed reduction tests, so that the rotating speed of a motor of the washing equipment is ensured to be higher than the resonance rotating speed nMWhen the washing machine is used, the deceleration effect of braking the washing machine is the best.
And S4, if the current rotating speed is not higher than the threshold value, braking the motor.
Specifically, in the embodiment of the present application, the motor is braked by any one of the following methods:
(1) a control system of the washing equipment generates a braking instruction;
sending the braking instruction to a braking device of the motor;
the motor is braked by a brake device.
(2) The washing equipment control system controls the driving frequency of the driving signal output by the motor driving device to be zero.
S4 further includes: and if the current rotating speed is higher than the threshold value, controlling the rotating speed of the motor to continuously reduce at a constant speed according to a preset acceleration.
According to the motor control method of the washing equipment provided by the embodiment of the invention, after the rotating speed of the motor is controlled to be reduced to the threshold value at a constant speed, the rotating speed of the motor is rapidly reduced to zero in a motor braking mode. Through the technical means, the reduction speed of the rotating speed is accelerated through braking after the rotating speed is reduced to the threshold value, the phenomenon that the washing equipment roller collides the barrel and is displaced due to the fact that the washing equipment roller passes through the resonance area of the suspension system for a long time is avoided, the time consumed by reduction is short, the motor is re-braked after the rotating speed is reduced to be close to the resonance speed, the generated noise is low, and the user experience is improved.
Based on the same inventive concept, an embodiment of the present invention further provides a motor control device for implementing the above control method, applied to a motor of a washing apparatus, as shown in fig. 2, the control device includes:
the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the current rotating speed of a motor of the washing equipment when the motor starts to reduce the speed;
the speed reduction module is used for controlling the rotating speed of the motor to reduce at a constant speed according to a preset acceleration;
the judging module is used for judging whether the current rotating speed of the motor is higher than a threshold value;
and the braking module is used for braking the motor if the current rotating speed is not higher than the threshold value.
The control device further includes:
the quality detection module is used for detecting the quality of clothes in the washing equipment;
the rigidity acquisition module is used for acquiring the rigidity of a washing equipment suspension system;
the compensation value acquisition module is used for acquiring a compensation rotating speed value corresponding to the mass;
and the calculating module is used for determining a threshold value corresponding to the mass according to the mass, the rigidity and the compensation rotating speed value.
The calculation module calculates the threshold value according to the following formula:
in the formula, nNear toA threshold value is indicated which is indicative of,
representing the resonant speed of the motor, k representing the stiffness of the suspension system of the washing apparatus, M representing the mass of the laundry inside the washing apparatus, nMAnd represents the corresponding compensation rotating speed value of the mass M.
The brake module includes:
the command generating unit is used for generating a braking command;
and the command sending unit is used for sending the braking command to a braking device of the motor.
The embodiment of the invention also provides washing equipment which comprises the motor control device.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the methods described in the embodiments of the present invention can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention or the method according to some parts of the embodiments.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A motor control method of a washing apparatus, comprising:
when a motor of washing equipment starts to reduce the speed, acquiring the current rotating speed of the motor;
controlling the rotating speed of the motor to reduce at a constant speed according to a preset acceleration;
judging whether the current rotating speed of the motor is higher than a threshold value, wherein the threshold value is lower than the rotating speed of the motor when the motor starts to reduce the speed and is larger than zero;
if the current rotating speed is not higher than the threshold value, braking the motor;
if the current rotating speed is higher than the threshold value, controlling the rotating speed of the motor to continuously reduce at a constant speed according to a preset acceleration;
before judging whether the current rotating speed of the motor is higher than the threshold value, the method further comprises the following steps:
detecting the quality of clothes in the washing equipment;
acquiring the rigidity of a suspension system of the washing equipment;
acquiring a motor compensation rotating speed value corresponding to the mass;
calculating the resonance rotating speed of the motor according to the mass and the rigidity;
calculating the threshold value according to the resonance rotating speed and the motor compensation rotating speed value;
according to the resonance rotating speed and the motor compensation rotating speed value, calculating a threshold value according to the following formula:
in the formula, nNear toA threshold value is indicated which is indicative of,
representing the resonant speed of the motor, k representing the stiffness of the suspension system of the washing apparatus, M representing the mass of the laundry inside the washing apparatus, nMAnd the motor compensation rotating speed value corresponding to the mass M is represented.
2. The control method according to claim 1, characterized in that the threshold value is a rotation speed value that is greater than a resonance rotation speed of the motor.
3. The control method of claim 1, wherein braking the motor comprises:
generating a braking instruction;
and sending the braking instruction to a braking device of the motor.
4. A motor control device of a washing apparatus, comprising:
the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the current rotating speed of a motor of the washing equipment when the motor starts to reduce the speed;
the speed reduction module is used for controlling the rotating speed of the motor to reduce at a constant speed according to a preset acceleration;
the judging module is used for judging whether the current rotating speed of the motor is higher than a threshold value, wherein the threshold value is lower than the rotating speed of the motor when the motor starts to reduce the speed and is larger than zero rotating speed;
the braking module is used for braking the motor when the current rotating speed is not higher than the threshold value;
the control module is used for controlling the rotating speed of the motor to continuously reduce at a constant speed according to a preset acceleration if the current rotating speed is higher than the threshold;
the control device further includes:
the quality detection module is used for detecting the quality of clothes in the washing equipment; the rigidity acquisition module is used for acquiring the rigidity of a washing equipment suspension system;
the compensation value acquisition module is used for acquiring a compensation rotating speed value corresponding to the mass;
the calculating module is used for calculating a threshold value according to the mass, the rigidity and the compensation rotating speed value;
the calculation module calculates the threshold value according to the following formula:
in the formula, nNear toA threshold value is indicated which is indicative of,
representing the resonant speed of the motor, k representing the stiffness of the suspension system of the washing apparatus, M representing the mass of the laundry inside the washing apparatus, nMAnd the motor compensation rotating speed value corresponding to the mass M is represented.
5. The control device of claim 4, wherein the braking module comprises:
the command generating unit is used for generating a braking command;
and the command sending unit is used for sending the braking command to a braking device of the motor.
6. A washing appliance comprising a motor control device according to any one of claims 4 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811367710.2A CN109487498B (en) | 2018-11-16 | 2018-11-16 | Motor control method and device of washing equipment and washing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811367710.2A CN109487498B (en) | 2018-11-16 | 2018-11-16 | Motor control method and device of washing equipment and washing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109487498A CN109487498A (en) | 2019-03-19 |
| CN109487498B true CN109487498B (en) | 2020-08-18 |
Family
ID=65696117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811367710.2A Active CN109487498B (en) | 2018-11-16 | 2018-11-16 | Motor control method and device of washing equipment and washing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109487498B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080085395A (en) * | 2007-03-19 | 2008-09-24 | 엘지전자 주식회사 | Controlling method for drum washer |
| US9145634B2 (en) * | 2013-06-04 | 2015-09-29 | Whirlpool Corporation | Method of operating a laundry treating appliance |
| US9163346B2 (en) * | 2014-01-29 | 2015-10-20 | Alliance Laundry Systems, Llc | Washing machine control system and methods |
| CN106283515B (en) * | 2015-05-29 | 2019-04-02 | 青岛海尔滚筒洗衣机有限公司 | A kind of brake control method and washing machine of washing machine variable-frequency motor |
| CN107177956B (en) * | 2017-05-08 | 2019-08-16 | 无锡飞翎电子有限公司 | Washing machine and its dehydration controlling method, device |
| CN107190464B (en) * | 2017-05-27 | 2021-09-17 | 青岛海尔洗衣机有限公司 | Control method of washing machine and washing machine |
| CN107401022B (en) * | 2017-09-06 | 2019-06-14 | 海信（山东）冰箱有限公司 | A kind of control method of washing machine, control device and washing machine |
-
2018
- 2018-11-16 CN CN201811367710.2A patent/CN109487498B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109487498A (en) | 2019-03-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108755009B (en) | Operation control method, system, device and storage medium for clothes processing device | |
| CN108547116B (en) | Operation control method, system, device and storage medium for clothes processing device | |
| EP2591159B1 (en) | Washing machine and method for controlling the same | |
| CN107190465B (en) | Drum washing machine, control method and device thereof and machine readable storage medium | |
| KR100792237B1 (en) | Spin-drying control apparatus and method for washing machine | |
| CN108286169B (en) | Washing machine vibration reduction system, washing machine, vibration detection method and control method | |
| CN106319842B (en) | Dewatering control method for washing machine | |
| CN108774849B (en) | Operation control method and system for clothes processing device and storage medium | |
| CN109487498B (en) | Motor control method and device of washing equipment and washing equipment | |
| CN111654209B (en) | Magnetic suspension bearing control parameter adjusting method and device, storage medium and controller | |
| KR20190126707A (en) | Spool braking device for dual bearing reel | |
| US5734135A (en) | Procedure for starting an elevator | |
| CN110699921B (en) | Active balance control system of drum washing machine and balancing method thereof | |
| CN113403803A (en) | Washing machine dehydration method and washing machine | |
| JP3877039B2 (en) | Dehydrating washing machine | |
| TW305894B (en) | ||
| JP2006068411A (en) | Washing machine | |
| WO2002094696A9 (en) | Wound roll vibration detection system | |
| US10612180B2 (en) | Methods and apparatus for measuring sensorless brushless DC motor load | |
| JP2007111159A (en) | Washing machine | |
| CN109839592B (en) | Method for identifying static/rotating of synchronous motor, related equipment and frequency converter | |
| CN109884334B (en) | Method and system for measuring rotor speed of shield motor in non-working state | |
| CN115956268A (en) | Method for determining synchronous speed | |
| CN110656468B (en) | Washing machine with unbalance compensation ring | |
| KR100548287B1 (en) | Unbalance detection apparatus and method of washing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |