CN106988077B - Method and system for preventing abnormal operation of motor of washing machine - Google Patents
Method and system for preventing abnormal operation of motor of washing machine Download PDFInfo
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- CN106988077B CN106988077B CN201710419472.4A CN201710419472A CN106988077B CN 106988077 B CN106988077 B CN 106988077B CN 201710419472 A CN201710419472 A CN 201710419472A CN 106988077 B CN106988077 B CN 106988077B
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- motor
- washing machine
- abnormal operation
- current
- detection signal
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- 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
- D06F33/00—Control of operations performed in washing machines or washer-dryers
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- 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
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
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- 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
The invention provides a method and a system for preventing abnormal operation of a motor of a washing machine, wherein the method comprises the following steps: s1, detecting current passing through a wire connected with a motor, and outputting a detection signal if the current passing through the wire is detected; s2, receiving the detection signal, and continuously detecting whether a stop instruction is sent out to control the stop of the motor; and S3, if the stop instruction is detected to be sent, judging whether current passes through a wire connected with the motor after the delay time, if no current passes through the wire, the motor is in normal operation, otherwise, the motor is in abnormal operation, and the power supply of the washing machine is forcibly cut off. The method for preventing the abnormal operation of the motor of the washing machine can judge whether the current of the lead wire output to the motor is normal or not, can identify the faults when the faults such as short circuit occur, and the like, and sends out the control command to cut off the power supply input so as to stop the operation of the motor, thereby playing a role in protection.
Description
Technical Field
The invention relates to the technical field of washing machines, in particular to a method and a system for preventing abnormal operation of a motor of a washing machine.
Background
At present, once the main motor driving circuit breaks down in use, current is output to the main motor uncontrollably, so that the motor belt drives the inner roller to rotate continuously at a high speed. Thus, firstly, the washing machine is very dangerous, especially in the case of the door being opened, even endangering the life and health of the personnel; secondly, under the condition of no one, the motor is electrified and rotated for a long time, other parts are easily damaged by heating, and even combustion occurs; thirdly, the waste of electric energy is caused.
In view of this, it is necessary to propose further solutions to the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a method and a system for preventing abnormal operation of a motor of a washing machine, which are used for overcoming the defects in the prior art.
To achieve the above object, the present invention provides a method for preventing abnormal operation of a motor of a washing machine, comprising:
s1, detecting current passing through a wire connected with a motor, and outputting a detection signal if the current passing through the wire is detected;
s2, receiving the detection signal, and continuously detecting whether a stop instruction is sent out to control the stop of the motor;
and S3, if the stop instruction is detected to be sent, judging whether current passes through a wire connected with the motor after the delay time, if no current passes through the wire, the motor is in normal operation, otherwise, the motor is in abnormal operation, and the power supply of the washing machine is forcibly cut off.
As an improvement of the method for preventing abnormal operation of a motor of a washing machine of the present invention, the step S1 further includes:
detecting current passing through a wire connected with the motor, outputting corresponding voltage if current passing is detected, amplifying the output voltage, and outputting the amplified voltage as a detection signal.
As an improvement of the method for preventing abnormal operation of a motor of a washing machine of the present invention, the step S3 further includes:
when the delay time passes, a current passes, and then buzzing alarm or voice alarm is carried out.
As an improvement of the method for preventing abnormal operation of a motor of a washing machine of the present invention, the step S3 further includes:
and when the delay time passes, current passes, and alarm information is sent to the mobile phone of the user.
As an improvement of the method for preventing abnormal operation of a motor of a washing machine of the present invention, the method further includes step S4:
when the delay time passes, no current passes, whether an operation instruction is sent out to control the rotation of the motor is continuously detected, if the detection signal is received again within the set time, the motor is controlled normally, otherwise, the motor is controlled abnormally.
To achieve the above object, the present invention provides a system for preventing abnormal operation of a motor of a washing machine, comprising: the current sensor, the MCU and the motor driving circuit;
the current sensor is used for: detecting current passing through a wire connected with a motor, and sending a detection signal to the MCU;
the MCU is used for: and receiving the detection signal, continuously detecting whether a stop instruction is sent out to control the motor driving circuit to be disconnected, if the stop instruction is detected to be sent out, judging whether current passes through a wire connected with the motor after the delay time passes, if no current passes through the wire, the motor is in normal operation, otherwise, the motor is in abnormal operation, and forcibly cutting off the power supply of the total relay of the washing machine.
As an improvement of the system for preventing abnormal operation of a motor of a washing machine of the present invention, the current sensor is for:
detecting the current passing through a wire connected with the motor, outputting corresponding voltage if the current passing through the wire is detected, amplifying the output voltage, and outputting the amplified voltage to the MCU as a detection signal.
As an improvement of the system for preventing abnormal operation of the motor of the washing machine of the present invention, the motor driving circuit includes a silicon controlled rectifier which is turned off or on.
As an improvement of the system for preventing abnormal operation of the motor of the washing machine of the present invention, the system further comprises a buzzer or a voice playing circuit.
As an improvement of the system for preventing abnormal operation of the motor of the washing machine of the present invention, the system further comprises a wireless communication module.
As an improvement of the system for preventing abnormal operation of the motor of the washing machine of the present invention, the MCU is further configured to:
when the delay time passes, no current passes, whether an operation instruction is sent out to control the rotation of the motor is continuously detected, if the detection signal is received again within the set time, the motor is controlled normally, otherwise, the motor is controlled abnormally.
Compared with the prior art, the invention has the beneficial effects that: the method for preventing the abnormal operation of the motor of the washing machine can judge whether the current of the lead wire output to the motor is normal or not, can identify the faults when the faults such as short circuit occur, and the like, and sends out the control command to cut off the power supply input so as to stop the operation of the motor, thereby playing a role in protection.
Drawings
FIG. 1 is a flow chart of a method for preventing abnormal operation of a motor of a washing machine according to an embodiment of the present invention;
fig. 2 is a circuit diagram of an embodiment of a system for preventing abnormal operation of a motor of a washing machine according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the embodiments shown in the drawings, but it should be understood that the embodiments are not limited to the present invention, and functional, method, or structural equivalents and alternatives according to the embodiments are within the scope of protection of the present invention by those skilled in the art.
As shown in fig. 1, the method of preventing abnormal operation of a motor of a washing machine according to the present invention includes the steps of:
s1, detecting the current passing through a wire connected with the motor, and outputting a detection signal if the current passing through the wire is detected.
Wherein, consider when the trouble such as short circuit appears, the motor is under the effect of the electric current that provides, continuously rotate. Therefore, in order to detect an abnormal operation state of the motor, a current passing through a wire connected to the motor may be detected and a detection signal may be output.
The detection signal is output as follows: detecting current passing through a wire connected with the motor, outputting corresponding voltage if current passing is detected, amplifying the output voltage, and outputting the amplified voltage as a detection signal.
S2, receiving the detection signal, and continuously detecting whether a stop instruction is sent out to control the stop of the motor.
The purpose of step S2 is to determine the state of the motor. When the normal rotation is expected under the control of the command, no subsequent method steps are performed. When a stop instruction is issued, detection of the operation state of the motor is started. The stop instruction is received and executed by the driving circuit of the motor, and when the driving circuit receives the stop instruction, the driving circuit is in an open circuit state, so that the motor is stopped.
And S3, if the stop instruction is detected to be sent, judging whether current passes through a wire connected with the motor after the delay time, if no current passes through the wire, the motor is in normal operation, otherwise, the motor is in abnormal operation, and the power supply of the washing machine is forcibly cut off.
Wherein, when a stop instruction is issued, the current passing through the wire connected with the motor should be zero after a delay time. If the motor is in abnormal operation, the motor can not be controlled to stop by the stop instruction, so that whether the operation state of the motor is normal can be judged.
In addition, the step S3 further includes alarming for the abnormal operation of the motor. Specifically, the step S3 further includes: when the delay time passes, a current passes, and then buzzing alarm or voice alarm is carried out. Alternatively, if the wireless module is integrated in the washing machine, when the delay time passes and a current passes, the wireless module sends alarm information to the mobile phone of the user, so that the problem that the user cannot receive buzzing alarm or voice alarm when not in the room is solved.
Further, when the motor is in a normal operation state, the method further comprises detecting whether the motor is controlled normally. Specifically, the method of the present invention further includes a step S4 for determining whether the motor can be restarted normally after the operation is stopped, wherein the step S4 includes:
when the delay time passes, no current passes, whether an operation instruction is sent out to control the rotation of the motor is continuously detected, if the detection signal is received again within the set time, the motor is controlled normally, otherwise, the motor is controlled abnormally.
Based on the above method for preventing abnormal operation of a motor of a washing machine, as shown in fig. 2, the present invention also provides a system for preventing abnormal operation of a motor of a washing machine, comprising: a current sensor 10, an MCU20, a motor drive circuit 30.
The current sensor 10 is arranged on a guide connected with the motor, and the current sensor 10 can be used for: the current passing through the wire connected to the motor is detected and a detection signal is transmitted to the MCU20. Preferably, the current transformer 10 may be a transformer coil current detection sensor.
Further, when outputting the detection signal, the current sensor 10 detects the current passing through the wire connected to the motor, if detecting that there is a current passing through, outputs a corresponding voltage, amplifies the output voltage, and outputs the amplified voltage as the detection signal to the MCU20.
The MCU20 is configured to: and receiving the detection signal, continuously detecting whether a stop command is sent to control the motor driving circuit 30 to be disconnected, if the stop command is detected to be sent, judging whether current passes through a wire connected with the motor after the delay time passes, if no current passes through the wire, the motor is in normal operation, otherwise, the motor is in abnormal operation, and the power supply of the total relay 40 of the washing machine is forcibly cut off.
Further, the motor driving circuit 30 includes a thyristor that performs disconnection or connection. Therefore, the silicon controlled rectifier is turned off or on according to the received instruction, and further the rotation and stop of the motor are controlled.
In order to alarm the abnormal operation of the motor, the system also comprises a buzzer or a voice playing circuit. Alternatively, the system also comprises a wireless communication module, and at the moment, the wireless communication module can send alarm information to the mobile phone of the user, so that the problem that the user cannot receive buzzing alarm or voice alarm when not in a room is solved.
Further, in order to realize that when the motor is in a normal operation state, whether the motor is controlled normally or not is detected. The MCU20 is also configured to: when the delay time passes, no current passes, whether an operation instruction is sent out to control the rotation of the motor is continuously detected, if the detection signal is received again within the set time, the motor is controlled normally, otherwise, the motor is controlled abnormally.
In summary, the method for preventing abnormal operation of the motor of the washing machine can judge whether the current of the lead wire output to the motor is normal, and when faults such as short circuit occur, the faults can be identified, a control command is sent out, the power input is cut off, and the motor stops operating, so that the protection function is realized.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. A method of preventing abnormal operation of a motor of a washing machine, the method comprising the steps of:
s1, detecting current passing through a wire connected with a motor, and outputting a detection signal if the current passing through the wire is detected;
s2, receiving the detection signal, and continuously detecting whether a stop instruction is sent out to control the stop of the motor;
s3, if the stop instruction is detected to be sent, judging whether current passes through a wire connected with the motor after the delay time, if no current passes through the wire, the motor is in normal operation, otherwise, the motor is in abnormal operation, and the power supply of the washing machine is forcibly cut off;
the step S1 includes:
detecting current passing through a wire connected with the motor, outputting corresponding voltage if current passing through is detected, amplifying the output voltage, and outputting the amplified voltage as a detection signal;
the method further includes step S4, step S4 is used for judging whether the motor can be restarted normally after stopping operation, and includes:
when the delay time passes, no current passes, whether an operation instruction is sent out to control the rotation of the motor is continuously detected, if the detection signal is received again within the set time, the motor is controlled normally, otherwise, the motor is controlled abnormally.
2. The method for preventing abnormal operation of a motor of a washing machine according to claim 1, wherein the step S3 further comprises:
when the delay time passes, a current passes, and then buzzing alarm or voice alarm is carried out.
3. The method for preventing abnormal operation of a motor of a washing machine according to claim 1, wherein the step S3 further comprises:
and when the delay time passes, current passes, and alarm information is sent to the mobile phone of the user.
4. A system for preventing abnormal operation of a motor of a washing machine, the system comprising: the current sensor, the MCU and the motor driving circuit;
the current sensor is used for: detecting current passing through a wire connected with a motor, and sending a detection signal to the MCU;
the MCU is used for: receiving the detection signal, continuously detecting whether a stop instruction is sent out to control the motor driving circuit to be disconnected, if the stop instruction is detected to be sent out, judging whether current passes through a wire connected with the motor after delay time, if no current passes through the wire, the motor is in normal operation, otherwise, the motor is in abnormal operation, and forcibly cutting off the power supply of a main relay of the washing machine;
the current sensor is used for:
detecting current passing through a wire connected with the motor, outputting corresponding voltage if current passing through is detected, amplifying the output voltage, and outputting the amplified voltage to the MCU as a detection signal;
the MCU is also used for:
judging whether the motor can be restarted normally after stopping operation;
when the delay time passes, no current passes, whether an operation instruction is sent out to control the rotation of the motor is continuously detected, if the detection signal is received again within the set time, the motor is controlled normally, otherwise, the motor is controlled abnormally.
5. The system for preventing abnormal operation of a motor of a washing machine as claimed in claim 4, wherein the motor driving circuit comprises a silicon controlled rectifier which is turned off or on.
6. The system for preventing abnormal operation of a motor of a washing machine according to claim 4, further comprising a buzzer or a voice playing circuit.
7. The system for preventing abnormal operation of a motor of a washing machine as claimed in claim 4, further comprising a wireless communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710419472.4A CN106988077B (en) | 2017-06-06 | 2017-06-06 | Method and system for preventing abnormal operation of motor of washing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710419472.4A CN106988077B (en) | 2017-06-06 | 2017-06-06 | Method and system for preventing abnormal operation of motor of washing machine |
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| Publication Number | Publication Date |
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| CN106988077A CN106988077A (en) | 2017-07-28 |
| CN106988077B true CN106988077B (en) | 2023-05-12 |
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| CN201710419472.4A Active CN106988077B (en) | 2017-06-06 | 2017-06-06 | Method and system for preventing abnormal operation of motor of washing machine |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1244605A (en) * | 1998-08-07 | 2000-02-16 | 三洋电机株式会社 | Washing machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993006615A1 (en) * | 1991-09-18 | 1993-04-01 | Princeton Medical Instruments, Inc. | Device to measure the rate of breakdown-mediated charge transfer on a dielectric |
| CN2381054Y (en) * | 1999-06-16 | 2000-05-31 | 张开雄 | Automatic alarming device for motor protection and fault |
| CN201328000Y (en) * | 2008-12-15 | 2009-10-14 | 天津市松正电动科技有限公司 | Protection circuit of electric vehicle controller |
| CN203104349U (en) * | 2013-01-21 | 2013-07-31 | 广东高标电子科技有限公司 | Brush motor controller and electric vehicle |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1244605A (en) * | 1998-08-07 | 2000-02-16 | 三洋电机株式会社 | Washing machine |
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Address after: 215000 No. 111 Kangyuan Road, Xiangcheng District, Suzhou City, Jiangsu Province Patentee after: JIANGSU SIMAND ELECTRIC APPLIANCE Co.,Ltd. Address before: 215000 No. 111 Kangyuan Road, Xiangcheng District, Suzhou City, Jiangsu Province Patentee before: JIANGSU XIN AN ELECTRIC APPLIANCE Co.,Ltd. |