CN111676646A - Shutdown control method and device for washing machine - Google Patents
Shutdown control method and device for washing machine Download PDFInfo
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- CN111676646A CN111676646A CN202010436955.7A CN202010436955A CN111676646A CN 111676646 A CN111676646 A CN 111676646A CN 202010436955 A CN202010436955 A CN 202010436955A CN 111676646 A CN111676646 A CN 111676646A
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- 238000005406 washing Methods 0.000 title claims abstract description 207
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000018044 dehydration Effects 0.000 claims description 19
- 238000006297 dehydration reaction Methods 0.000 claims description 19
- 239000002184 metal Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000009467 reduction Effects 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
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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
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
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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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
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Abstract
The invention provides a stop control method and a stop control device for a washing machine, wherein the method comprises the following steps: when the washing machine needs to be stopped, a lower bridge arm of an IGBT of the washing machine is opened; setting a target rotating speed of a motor of the washing machine to be 0, wherein the target rotating speed is the rotating speed which the motor needs to reach; and controlling the motor to reach the target rotating speed. The scheme can shorten the stop time of the washing machine.
Description
Technical Field
The invention relates to the technical field of intelligent household appliances, in particular to a method and a device for controlling the shutdown of a washing machine.
Background
With the improvement of the living standard of people, the washing machine has become an essential household appliance in daily life. When the washing machine is used for high-speed dehydration, if the motor rotating at high speed is not well controlled during braking, a large amount of mechanical energy of the motor is converted into electric energy, the electric energy can be gathered on a capacitor on a direct current side, so that the voltage of a direct current bus is increased, the circuit is possibly damaged, and even the bus capacitor is broken down by a serious person, so that the control of the motor of the washing machine is abnormal. Therefore, the stop control of the washing machine is particularly important.
In the prior art, when the washing machine is stopped at a high speed, a speed reduction curve is generally established, and the rotating speed command of the motor is controlled to be gradually reduced through the speed reduction curve until the motor is stopped.
However, in the prior art, the rotation speed of the motor is gradually reduced until the washing machine stops by establishing a deceleration curve, and the deceleration process takes a long time, so that the stop process of the washing machine takes a long time.
Chinese patent application No. 201811467346.7 discloses a shutdown method and controller for a washing machine, which inputs currents for a d-axis and a q-axis of a motor according to a reference current value when a shutdown instruction is received by setting the reference current value, and obtains the rotation speed of the motor in real time so as to achieve the purpose of decelerating and shutting down the motor.
Disclosure of Invention
The embodiment of the invention provides a stop control method and a stop control device for a washing machine, which can shorten the stop time of the washing machine.
In a first aspect, the present invention provides a stop control method of a washing machine, comprising:
when the washing machine needs to be stopped, a lower bridge arm of an IGBT of the washing machine is opened;
setting a target rotating speed of a motor of the washing machine to be 0, wherein the target rotating speed is a rotating speed which the motor needs to reach;
and controlling the motor to reach the target rotating speed.
Preferably, the first and second electrodes are formed of a metal,
after the controlling the motor to reach the target rotation speed, further comprising:
when the rotation speed of the motor reaches the target rotation speed,
detecting whether the alpha-axis current and the beta-axis current of the motor are both smaller than a preset value within a preset time length in real time, and if so, determining that the stop of the washing machine is finished;
and judging whether the time length from the current moment to the first moment is equal to a first preset time length or not in real time, and if so, determining that the stop of the washing machine is finished, wherein the first moment is the moment when the rotating speed of the motor reaches the target rotating speed.
Preferably, the first and second electrodes are formed of a metal,
when the washing machine needs to be stopped in a washing mode,
before the switching on the lower arm of the IGBT of the washing machine, the method further comprises the following steps:
setting target current values of d-axis current and q-axis current of the motor to be 0, wherein the target current values are current values which the d-axis current and the q-axis current need to reach;
controlling the d-axis current and the q-axis current of the motor to reach the target current value;
and judging whether the time length from the current moment to a second moment is equal to a second preset time length or not in real time, if so, opening a lower bridge arm of the IGBT of the washing machine, wherein the second moment is the moment when the target current values of the d-axis current and the q-axis current of the motor are both set to be 0.
Preferably, the first and second electrodes are formed of a metal,
when the washing machine needs to be stopped in the dehydration mode,
before the switching on the lower arm of the IGBT of the washing machine, the method further comprises the following steps:
and judging whether the time length from the current moment to a third moment is equal to a third preset time length or not in real time, if so, opening a lower bridge arm of the IGBT of the washing machine, wherein the third moment is the moment when the washing machine needs to be stopped in a dehydration mode.
Preferably, the first and second electrodes are formed of a metal,
the opening of the lower arm of the IGBT of the washing machine comprises:
opening a lower bridge arm of each IGBT of the washing machine;
and/or the presence of a gas in the gas,
before the setting the target rotation speed of the motor of the washing machine to 0, further comprising:
and closing the locked-rotor protection, the open-phase protection and the overcurrent protection of the washing machine.
In a second aspect, the present invention provides a stop control device for a washing machine, comprising:
the shutdown processing module is used for opening a lower bridge arm of the IGBT of the washing machine when the washing machine needs to be stopped;
the washing machine comprises a rotating speed setting module, a control module and a control module, wherein the rotating speed setting module is used for setting a target rotating speed of a motor of the washing machine to be 0, and the target rotating speed is a rotating speed which the motor needs to reach;
and the rotating speed control module is used for controlling the motor to reach the target rotating speed set by the rotating speed setting module.
Preferably, the first and second electrodes are formed of a metal,
further comprising:
the current processing module is used for detecting whether the alpha-axis current and the beta-axis current of the motor are both smaller than a preset value within a preset time length in real time after the rotating speed control module controls the rotating speed of the motor to reach the target rotating speed, and if so, determining that the washing machine is stopped;
and the time processing module is used for judging whether the time length from the current moment to the first moment is equal to a first preset time length or not in real time, and if so, determining that the stop of the washing machine is finished, wherein the first moment is the moment when the rotating speed of the motor reaches the target rotating speed.
Preferably, the first and second electrodes are formed of a metal,
further comprising:
the current setting module is used for setting target current values of d-axis current and q-axis current of the motor to be 0 when the washing machine needs to be stopped in a washing mode, wherein the target current values are current values which the d-axis current and the q-axis current need to reach;
a current control module for controlling the d-axis current and the q-axis current of the motor set by the current setting module to reach the target current value;
and the washing processing module is used for judging whether the time length from the current moment to a second moment is equal to a second preset time length or not in real time, and if so, triggering the stopping processing module, wherein the second moment is the moment when the target current values of the d-axis current and the q-axis current of the motor are both set to be 0.
Preferably, the first and second electrodes are formed of a metal,
further comprising:
and the dewatering processing module is used for judging whether the time length from the current moment to a third moment is equal to a third preset time length or not in real time when the washing machine needs to stop in the dewatering mode, and if so, triggering the stopping processing module, wherein the third moment is the moment when the washing machine needs to stop in the dewatering mode.
Preferably, the first and second electrodes are formed of a metal,
the shutdown processing module is used for opening a lower bridge arm of each IGBT of the washing machine;
and/or the presence of a gas in the gas,
further comprising:
and the protection setting module is used for closing the locked-rotor protection, the open-phase protection and the overcurrent protection of the washing machine and triggering the rotating speed setting module.
The embodiment of the invention provides a method and a device for controlling the shutdown of a washing machine, wherein when the washing machine is in high-speed dehydration shutdown, a deceleration curve is generally required to be established, and the rotation speed command of a motor is controlled to be gradually reduced through the deceleration curve until the motor stops, so that the shutdown control of the washing machine is realized. Through the mode, the speed of the motor of the washing machine does not need to be controlled to be gradually reduced through the speed reduction curve, the consumed time is short, and therefore the stop time of the washing machine can be shortened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of a stop control method of a washing machine according to an embodiment of the present invention;
fig. 2 is a flowchart of a stop control method of a washing machine according to another embodiment of the present invention;
fig. 3 is a flowchart of a stop control method of a washing machine according to an embodiment of the present invention;
fig. 4 is a schematic view of a stop control apparatus of a washing machine according to an embodiment of the present invention;
FIG. 5 is a schematic view of a stop control device of another washing machine according to an embodiment of the present invention;
FIG. 6 is a schematic view of a stop control device of a washing machine according to an embodiment of the present invention;
fig. 7 is a schematic view of a stop control apparatus of still another washing machine according to an embodiment of the present invention;
fig. 8 is a schematic view of a stop control device of a washing machine 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 and more complete, the technical solutions in the embodiments of the present invention will be 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, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a stop control method of a washing machine, which may include the steps of:
step 101: when the washing machine needs to be stopped, a lower bridge arm of an IGBT of the washing machine is opened;
step 102: setting a target rotating speed of a motor of the washing machine to be 0, wherein the target rotating speed is the rotating speed which the motor needs to reach;
step 103: and controlling the motor to reach the target rotating speed.
In the embodiment of the invention, when the washing machine is in high-speed dehydration shutdown, a deceleration curve generally needs to be established, and the rotating speed command of the motor is controlled to be gradually reduced through the deceleration curve until the motor stops, so that the shutdown control of the washing machine is realized. Through the mode, the speed of the motor of the washing machine does not need to be controlled to be gradually reduced through the speed reduction curve, the consumed time is short, and therefore the stop time of the washing machine can be shortened.
In order to avoid a large error caused by the fluctuation of the rotation speed of the motor, in an embodiment of the present invention, after controlling the motor to reach the target rotation speed, the method further includes:
when the rotation speed of the motor reaches the target rotation speed,
detecting whether the alpha-axis current and the beta-axis current of the motor are both smaller than a preset value within a preset time length in real time, and if so, determining that the stop of the washing machine is finished;
and judging whether the time length from the current moment to the first moment is equal to a first preset time length or not in real time, and if so, determining that the stop of the washing machine is finished, wherein the first moment is the moment when the rotating speed of the motor reaches the target rotating speed.
In the embodiment of the present invention, since the rotation speed of the motor of the washing machine fluctuates when the rotation speed reaches the target rotation speed, in order to reduce the increase of the error due to the fluctuation of the rotation speed of the motor, the α -axis current and the β -axis current may be detected in real time after the rotation speed of the motor reaches the target rotation speed, and when both the α -axis current and the β -axis current are smaller than a preset value (e.g., 0.2A) within a preset time length (e.g., 500ms), it may be determined that the rotation speed of the motor has dropped to zero, and whether the shutdown is completed may be determined, or may be determined based on the time length from the current time to the first time when the rotation speed of the motor reaches the target rotation speed and the first preset time length, for example, it may be assumed that the first preset time length is 10s, if the time length from the current time to the first time when the rotation speed of the motor, the shutdown may also be determined to be complete.
To accomplish shutdown in the wash mode, in one embodiment of the invention,
when the washing machine needs to be stopped in the washing mode,
before the lower bridge arm of the IGBT of the washing machine is opened, the method further comprises the following steps:
setting target current values of d-axis current and q-axis current of the motor to be 0, wherein the target current values are current values which the d-axis current and the q-axis current need to reach;
controlling the d-axis current and the q-axis current of the motor to reach a target current value;
and judging whether the time length from the current moment to a second moment is equal to a second preset time length or not in real time, if so, opening a lower bridge arm of the IGBT of the washing machine, wherein the second moment is the moment when the target current values of the d-axis current and the q-axis current of the motor are both set to be 0.
In the embodiment of the invention, when the washing machine is stopped, the rotating speed of the motor needs to be controlled to reach the target rotating speed, namely the rotating speed of the washing machine is controlled to be 0, when the operation mode of the washing machine is a washing mode, the target current values of the d-axis current and the q-axis current of the motor are both set to be 0, the d-axis current and the q-axis current of the motor are controlled to reach the target current values to control the motor to decelerate, and when the time length from the current moment to the second moment is equal to the second preset time length, the lower bridge arm of the IGBT of the washing machine is opened. For example, it is assumed that the second preset time duration may be set to 2.5s, and is generally set to 1-4s, and when the time duration from the current time to the second time at which the target current values of the d-axis current and the q-axis current are both set to 0 is 2.5s, the lower arm of the IGBT of the washing machine is turned on to control the operation speed of the motor to gradually decrease to zero.
In order to accomplish the stop of the motor of the washing machine in the spinning mode, in one embodiment of the present invention,
when the washing machine needs to be stopped in the dehydration mode,
before the lower bridge arm of the IGBT of the washing machine is opened, the method further comprises the following steps:
and judging whether the time length from the current moment to a third moment is equal to a third preset time length or not in real time, if so, opening a lower bridge arm of the IGBT of the washing machine, wherein the third moment is the moment when the washing machine needs to be stopped in a dehydration mode.
In the embodiment of the invention, when the operation mode of the washing machine is the dehydration mode, a third preset time length (for example, 3s) can be set, and when the time length from the current moment to a third moment when the washing machine needs to be stopped in the dehydration mode is equal to the third preset time length, the lower bridge arm of the IGBT of the washing machine is turned on to control the rotating speed of the motor to reach the target rotating speed.
In order to shorten the shutdown process of the washing machine, in the embodiment of the present invention, the step 101 of opening the lower arm of the IGBT of the washing machine in the above embodiment includes:
opening a lower bridge arm of each IGBT of the washing machine;
in the embodiment of the invention, each washing machine comprises the lower bridge arm of the IGBT, and the number of the lower bridge arms of the IGBT is 6, so that the lower bridge arm of each IGBT of the washing machine needs to be opened, and the rotating speed of the washing machine is controlled to gradually reach the target rotating speed.
In order to normally implement the shutdown, in an embodiment of the present invention, before the step 102 of setting the target rotation speed of the motor of the washing machine to 0, the method further includes:
the locked-rotor protection, the open-phase protection and the overcurrent protection of the washing machine are closed.
In the embodiment of the invention, because the washing machine reports the fault after any one of the conditions of the locked rotor, the open phase or the overcurrent occurs, the washing machine is protected, and at the moment, the washing machine cannot be stopped, so that in order to realize the normal stop of the washing machine, the locked rotor protection, the open phase protection and the overcurrent protection of the washing machine need to be closed before the target rotating speed of the motor of the washing machine is set to be 0, so as to execute the normal stop operation.
In an embodiment of the present invention, the shutdown process of the washing machine in the above embodiment can be divided into five stages:
when the washing machine needs to be stopped, the method firstly enters a stopping starting stage: and judging whether the machine is normally stopped or abnormally stopped.
If the abnormal shutdown is performed, for example, the abnormal shutdown is performed when any one of the conditions of phase failure, overvoltage and overcurrent exists, the lower bridge arm of the IGBT can be fully opened, and the locked-rotor protection, the phase failure protection and the overcurrent protection are fully closed, so that the condition that the shutdown operation cannot be performed due to failure reporting of the washing machine due to protection is prevented, and meanwhile, the target rotating speed of the motor is set to be zero, and a braking zero-speed detection stage is started;
if the machine is normally stopped, firstly, mode judgment is carried out, and then, mode processing is carried out. If the washing mode is adopted, the locked rotor protection, the open-phase protection and the overcurrent protection are completely closed, the reference currents of the d axis and the q axis are set to be zero, meanwhile, a second preset time length is set, and the washing mode enters a shutdown holding stage;
after entering a shutdown holding stage, if the time length from the current moment to a second moment is a second preset time length, closing the overcurrent protection, fully opening a lower bridge arm of the IGBT, and entering a brake shutdown stage;
after entering a brake shutdown stage, detecting and judging the speed of the motor in real time, when the speed of the motor is detected to be reduced to zero, taking the estimated rotor position as an initial position for starting the motor next time, setting a first preset time length, and entering a brake zero-speed detection stage;
if the motor is in the dewatering mode, setting a third preset time length, fully opening a lower bridge arm of the IGBT to enable the rotating speed of the motor to be gradually reduced to a target rotating speed when the time length between the current moment and the third moment reaches the third preset time length, simultaneously, fully closing locked-rotor protection, open-phase protection and overcurrent protection in order to prevent the motor from being incapable of being normally shut down due to failure reporting, simultaneously setting the target rotating speed of the motor to be 0, setting the first preset time length, and entering a braking zero-speed detection stage;
after entering a braking zero-speed detection stage, judging whether the time length from the current moment to the first moment is a preset value, for example, 30s, if so, entering a shutdown completion stage. Otherwise, the α and β axis currents of the motor are continuously determined, and if the α and β axis currents are both less than 0.2A and continuously preset values (for example, 500ms), the shutdown completion stage is entered.
When the stop completion stage is entered, the whole stop process of the washing machine is completed.
The invention can realize that the motor can be stopped quickly and safely under the conditions of washing and dehydration, normal shutdown and abnormal shutdown, and the motor current is controlled to be very small in the shutdown process.
As shown in fig. 2, an embodiment of the present invention provides a detailed description of a stop control method for a washing machine, including:
step 201: when the washing machine needs to be stopped in a washing mode, target current values of a d-axis current and a q-axis current of the motor are both set to 0, wherein the target current values are current values that the d-axis current and the q-axis current need to reach.
Step 202: and controlling the d-axis current and the q-axis current of the motor to reach the target current values.
Step 203: and judging whether the time length from the current moment to the second moment is equal to a second preset time length in real time.
Step 204: and if the time length from the current moment to a second moment is equal to a second preset time length, opening a lower bridge arm of each IGBT of the washing machine, wherein the second moment is the moment when the target current values of the d-axis current and the q-axis current of the motor are both set to be 0.
Step 205: the locked-rotor protection, the open-phase protection and the overcurrent protection of the washing machine are closed.
Step 206: the target rotation speed of the motor of the washing machine is set to 0, wherein the target rotation speed is the rotation speed which the motor needs to reach.
Step 207: and controlling the motor to reach the target rotating speed.
Step 208: and when the rotating speed of the motor reaches the target rotating speed, detecting whether the alpha-axis current and the beta-axis current of the motor are both smaller than a preset value within a preset time length in real time.
Step 209: and if the alpha-axis current and the beta-axis current of the motor are both smaller than the preset value within the preset time span, determining that the stop of the washing machine is finished.
Step 210: and judging whether the time length from the current moment to the first moment is equal to a first preset time length or not in real time.
Step 211: and if the time length from the current moment to the first moment is equal to a first preset time length, determining that the stop of the washing machine is finished, wherein the first moment is the moment when the rotating speed of the motor reaches the target rotating speed.
As shown in fig. 3, the embodiment of the present invention further provides a detailed description of a shutdown control method of a washing machine, including:
step 301: and when the washing machine needs to stop in the dehydration mode, judging whether the time length from the current moment to a third moment is equal to a third preset time length or not in real time, wherein the third moment is the moment when the washing machine needs to stop in the dehydration mode.
Step 302: and if the time length from the current moment to the third moment is equal to a third preset time length, opening a lower bridge arm of each IGBT of the washing machine.
Step 303: the locked-rotor protection, the open-phase protection and the overcurrent protection of the washing machine are closed.
Step 304: the target rotation speed of the motor of the washing machine is set to 0, wherein the target rotation speed is the rotation speed which the motor needs to reach.
Step 305: and controlling the motor to reach the target rotating speed.
Step 306: and when the rotating speed of the motor reaches the target rotating speed, detecting whether the alpha-axis current and the beta-axis current of the motor are both smaller than a preset value within a preset time length in real time.
Step 307: and if the alpha-axis current and the beta-axis current of the motor are both smaller than the preset value within the preset time span, determining that the stop of the washing machine is finished.
Step 308: and judging whether the time length from the current moment to the first moment is equal to a first preset time length or not in real time.
Step 309: and if the time length from the current moment to the first moment is equal to a first preset time length, determining that the stop of the washing machine is finished, wherein the first moment is the moment when the rotating speed of the motor reaches the target rotating speed.
As shown in fig. 4, an embodiment of the present invention provides a stop control device for a washing machine, including:
the shutdown processing module 201 is used for opening a lower bridge arm of the IGBT of the washing machine when the washing machine needs to be shut down;
a rotating speed setting module 202, configured to set a target rotating speed of a motor of the washing machine to 0, where the target rotating speed is a rotating speed that the motor needs to reach;
and a rotation speed control module 203 for controlling the motor to reach the target rotation speed set by the rotation speed setting module 202.
In the embodiment of the invention, because the washing machine generally needs to establish a deceleration curve when the washing machine is stopped in high-speed dehydration, the rotating speed command of the motor is controlled to be gradually reduced through the deceleration curve until the motor is stopped, thereby realizing the stop control of the washing machine, however, the deceleration process takes longer time, which results in longer stop time of the washing machine, therefore, in order to ensure that the motor of the washing machine can be stopped quickly under the condition of needing to be stopped, the stop time of the washing machine is shortened, the lower bridge arm of the IGBT of the washing machine is opened through the stop processing module to control the rotation speed of the motor of the washing machine to be gradually reduced under the condition that the washing machine needs to be stopped, meanwhile, the target rotating speed of the washing machine is set to be 0 through the rotating speed setting module, and when the target rotating speed of the motor becomes zero, the stop control of the washing machine is completed through the rotating speed control module. Through the mode, the speed of the motor of the washing machine does not need to be controlled to be gradually reduced through the speed reduction curve, the consumed time is short, and therefore the stop time of the washing machine can be shortened.
As shown in fig. 5, based on the stop control apparatus of the washing machine shown in fig. 4, in an embodiment of the present invention,
further comprising:
the current processing module 204 is used for detecting whether the alpha axis current and the beta axis current of the motor are both smaller than a preset value within a preset time length in real time after the rotating speed of the motor controlled by the rotating speed control module 203 reaches a target rotating speed, and if so, determining that the stop of the washing machine is finished;
and the time processing module 205 is configured to determine whether a time length from the current time to a first time is equal to a first preset time length in real time, and if so, determine that the washing machine is stopped, where the first time is a time when the rotating speed of the motor reaches a target rotating speed.
As shown in fig. 6, based on the stop control apparatus of the washing machine shown in fig. 4, in an embodiment of the present invention,
further comprising:
a current setting module 206, configured to set target current values of a d-axis current and a q-axis current of the motor to 0 when the washing machine needs to be stopped in a washing mode, where the target current values are current values that the d-axis current and the q-axis current need to reach;
a current control module 207 for controlling the d-axis current and the q-axis current of the motor set by the current setting module 206 to reach a target current value;
and the washing processing module 208 is configured to determine whether the time length from the current time to a second time is equal to a second preset time length in real time, and if so, trigger the shutdown processing module 201, where the second time is a time when the target current values of the d-axis current and the q-axis current of the motor are both set to 0.
As shown in fig. 7, based on the stop control apparatus of the washing machine shown in fig. 4, in an embodiment of the present invention,
further comprising:
and the dehydration processing module 209 is configured to, when the washing machine needs to stop in the dehydration mode, determine in real time whether a time length from the current time to a third time is equal to a third preset time length, and if so, trigger the stop processing module 201, where the third time is a time when the washing machine needs to stop in the dehydration mode.
In one embodiment of the present invention, the first and second electrodes are,
a shutdown processing module 201 for turning on a lower arm of each IGBT of the washing machine;
as shown in fig. 8, based on the stop control apparatus of the washing machine shown in fig. 4,
further comprising:
and the protection setting module 210 is used for closing the locked rotor protection, the open-phase protection and the overcurrent protection of the washing machine and triggering the rotating speed setting module 202.
It is understood that the illustrated structure of the embodiment of the present invention does not constitute a specific limitation to the stop control device of the washing machine. In other embodiments of the present invention, the stop control device of the washing machine may include more or fewer components than those shown, or combine some components, or split some components, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
Because the information interaction, execution process, and other contents between the units in the device are based on the same concept as the method embodiment of the present invention, specific contents may refer to the description in the method embodiment of the present invention, and are not described herein again.
The embodiment of the invention also provides a stop control device of the washing machine, which comprises: at least one memory and at least one processor;
at least one memory for storing a machine readable program;
at least one processor for calling a machine readable program to perform a method for controlling a stop of a washing machine according to any one of the embodiments of the present invention.
Embodiments of the present invention further provide a computer readable medium, on which computer instructions are stored, and when the computer instructions are executed by a processor, the processor executes a shutdown control method of a washing machine according to any embodiment of the present invention. Specifically, a system or an apparatus equipped with a storage medium on which software program codes that realize the functions of any of the above-described embodiments are stored may be provided, and a computer (or a CPU or MPU) of the system or the apparatus is caused to read out and execute the program codes stored in the storage medium.
In this case, the program code itself read from the storage medium can realize the functions of any of the above-described embodiments, and thus the program code and the storage medium storing the program code constitute a part of the present invention.
Examples of the storage medium for supplying the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (e.g., CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW), a magnetic tape, a nonvolatile memory card, and a ROM. Alternatively, the program code may be downloaded from a server computer via a communications network.
Further, it should be clear that the functions of any one of the above-described embodiments may be implemented not only by executing the program code read out by the computer, but also by causing an operating system or the like operating on the computer to perform a part or all of the actual operations based on instructions of the program code.
Further, it is to be understood that the program code read out from the storage medium is written to a memory provided in an expansion board inserted into the computer or to a memory provided in an expansion unit connected to the computer, and then causes a CPU or the like mounted on the expansion board or the expansion unit to perform part or all of the actual operations based on instructions of the program code, thereby realizing the functions of any of the above-described embodiments.
The embodiments of the invention have at least the following beneficial effects:
1. in the embodiment of the invention, when the washing machine is in high-speed dehydration shutdown, a deceleration curve generally needs to be established, and the rotating speed command of the motor is controlled to be gradually reduced through the deceleration curve until the motor stops, so that the shutdown control of the washing machine is realized. By the mode, the speed of the motor of the washing machine does not need to be controlled to be gradually reduced through the speed reduction curve, and the consumed time is short, so that the stop time of the washing machine can be shortened;
2. in the embodiment of the present invention, since the rotation speed of the motor of the washing machine fluctuates when the rotation speed reaches the target rotation speed, in order to reduce the increase of the error due to the fluctuation of the rotation speed of the motor, the α -axis current and the β -axis current may be detected in real time after the rotation speed of the motor reaches the target rotation speed, and when both the α -axis current and the β -axis current are smaller than a preset value (e.g., 0.2A) within a preset time length (e.g., 500ms), it may be determined that the rotation speed of the motor has dropped to zero, and whether the shutdown is completed may be determined, or may be determined based on the time length from the current time to the first time when the rotation speed of the motor reaches the target rotation speed and the first preset time length, for example, it may be assumed that the first preset time length is 10s, if the time length from the current time to the first time when the rotation speed of the motor, then shutdown may also be determined to be complete;
3. in an embodiment of the present invention, when the washing machine is stopped, the rotation speed of the motor needs to be controlled to reach the target rotation speed, that is, the rotation speed of the washing machine is controlled to be 0, when the operation mode of the washing machine is the washing mode, the motor is controlled to decelerate by setting the target current values of the d-axis current and the q-axis current of the motor to be 0, and when the time length from the current time to the second time is equal to the second preset time length, the lower arm of the IGBT of the washing machine is turned on. For example, it is assumed that the second preset time duration may be set to 2.5s, and is generally set to 1-4s, and when the time duration from the current time to the second time at which the target current values of the d-axis current and the q-axis current are both set to 0 is 2.5s, the lower arm of the IGBT of the washing machine is turned on to control the operation speed of the motor to gradually decrease to zero.
It should be noted that not all steps and modules in the above flows and system structure diagrams are necessary, and some steps or modules may be omitted according to actual needs. The execution order of the steps is not fixed and can be adjusted as required. The system structure described in the above embodiments may be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by a plurality of physical entities, or some components in a plurality of independent devices may be implemented together.
In the above embodiments, the hardware unit may be implemented mechanically or electrically. For example, a hardware element may comprise permanently dedicated circuitry or logic (such as a dedicated processor, FPGA or ASIC) to perform the corresponding operations. The hardware elements may also comprise programmable logic or circuitry, such as a general purpose processor or other programmable processor, that may be temporarily configured by software to perform the corresponding operations. The specific implementation (mechanical, or dedicated permanent, or temporarily set) may be determined based on cost and time considerations.
While the invention has been shown and described in detail in the drawings and in the preferred embodiments, it is not intended to limit the invention to the embodiments disclosed, and it will be apparent to those skilled in the art that various combinations of the code auditing means in the various embodiments described above may be used to obtain further embodiments of the invention, which are also within the scope of the invention.
Claims (10)
1. The stop control method of the washing machine is characterized by comprising the following steps:
when the washing machine needs to be stopped, a lower bridge arm of an IGBT of the washing machine is opened;
setting a target rotating speed of a motor of the washing machine to be 0, wherein the target rotating speed is a rotating speed which the motor needs to reach;
and controlling the motor to reach the target rotating speed.
2. The method of claim 1,
after the controlling the motor to reach the target rotation speed, further comprising:
when the rotation speed of the motor reaches the target rotation speed,
detecting whether the alpha-axis current and the beta-axis current of the motor are both smaller than a preset value within a preset time length in real time, and if so, determining that the stop of the washing machine is finished;
and judging whether the time length from the current moment to the first moment is equal to a first preset time length or not in real time, and if so, determining that the stop of the washing machine is finished, wherein the first moment is the moment when the rotating speed of the motor reaches the target rotating speed.
3. The method of claim 1,
when the washing machine needs to be stopped in a washing mode,
before the switching on the lower arm of the IGBT of the washing machine, the method further comprises the following steps:
setting target current values of d-axis current and q-axis current of the motor to be 0, wherein the target current values are current values which the d-axis current and the q-axis current need to reach;
controlling the d-axis current and the q-axis current of the motor to reach the target current value;
and judging whether the time length from the current moment to a second moment is equal to a second preset time length or not in real time, if so, opening a lower bridge arm of the IGBT of the washing machine, wherein the second moment is the moment when the target current values of the d-axis current and the q-axis current of the motor are both set to be 0.
4. The method of claim 1,
when the washing machine needs to be stopped in the dehydration mode,
before the switching on the lower arm of the IGBT of the washing machine, the method further comprises the following steps:
and judging whether the time length from the current moment to a third moment is equal to a third preset time length or not in real time, if so, opening a lower bridge arm of the IGBT of the washing machine, wherein the third moment is the moment when the washing machine needs to be stopped in a dehydration mode.
5. The method according to any one of claims 1 to 4,
the opening of the lower arm of the IGBT of the washing machine comprises:
opening a lower bridge arm of each IGBT of the washing machine;
and/or the presence of a gas in the gas,
before the setting the target rotation speed of the motor of the washing machine to 0, further comprising:
and closing the locked-rotor protection, the open-phase protection and the overcurrent protection of the washing machine.
6. The stop control device of the washing machine is characterized by comprising:
the shutdown processing module is used for opening a lower bridge arm of the IGBT of the washing machine when the washing machine needs to be stopped;
the washing machine comprises a rotating speed setting module, a control module and a control module, wherein the rotating speed setting module is used for setting a target rotating speed of a motor of the washing machine to be 0, and the target rotating speed is a rotating speed which the motor needs to reach;
and the rotating speed control module is used for controlling the motor to reach the target rotating speed set by the rotating speed setting module.
7. The apparatus of claim 6,
further comprising:
the current processing module is used for detecting whether the alpha-axis current and the beta-axis current of the motor are both smaller than a preset value within a preset time length in real time after the rotating speed control module controls the rotating speed of the motor to reach the target rotating speed, and if so, determining that the washing machine is stopped;
and the time processing module is used for judging whether the time length from the current moment to the first moment is equal to a first preset time length or not in real time, and if so, determining that the stop of the washing machine is finished, wherein the first moment is the moment when the rotating speed of the motor reaches the target rotating speed.
8. The apparatus of claim 6,
further comprising:
the current setting module is used for setting target current values of d-axis current and q-axis current of the motor to be 0 when the washing machine needs to be stopped in a washing mode, wherein the target current values are current values which the d-axis current and the q-axis current need to reach;
a current control module for controlling the d-axis current and the q-axis current of the motor set by the current setting module to reach the target current value;
and the washing processing module is used for judging whether the time length from the current moment to a second moment is equal to a second preset time length or not in real time, and if so, triggering the stopping processing module, wherein the second moment is the moment when the target current values of the d-axis current and the q-axis current of the motor are both set to be 0.
9. The apparatus of claim 6,
further comprising:
and the dewatering processing module is used for judging whether the time length from the current moment to a third moment is equal to a third preset time length or not in real time when the washing machine needs to stop in the dewatering mode, and if so, triggering the stopping processing module, wherein the third moment is the moment when the washing machine needs to stop in the dewatering mode.
10. The apparatus according to any one of claims 6 to 9,
the shutdown processing module is used for opening a lower bridge arm of each IGBT of the washing machine;
and/or the presence of a gas in the gas,
further comprising:
and the protection setting module is used for closing the locked-rotor protection, the open-phase protection and the overcurrent protection of the washing machine and triggering the rotating speed setting module.
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| CN202010436955.7A CN111676646A (en) | 2020-05-21 | 2020-05-21 | Shutdown control method and device for washing machine |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040046212A (en) * | 2002-11-26 | 2004-06-05 | 엘지전자 주식회사 | method for braking motor in dehydration cycle of washing machine |
| CN105281634A (en) * | 2014-07-21 | 2016-01-27 | 苏州伟创电气设备技术有限公司 | Motor demagnetization method and apparatus |
| CN105656370A (en) * | 2016-03-09 | 2016-06-08 | 广东美的制冷设备有限公司 | Air conditioner and shutdown control method and device for compressor of air conditioner |
| CN106480641A (en) * | 2015-08-28 | 2017-03-08 | 无锡飞翎电子有限公司 | The fault diagnosis of washing machine and restorative procedure |
| CN106685271A (en) * | 2016-08-05 | 2017-05-17 | 湖南利能科技股份有限公司 | Running state control method of brushless double-fed motor |
| JP2017093534A (en) * | 2015-11-19 | 2017-06-01 | パナソニックＩｐマネジメント株式会社 | Washing machine |
| CN108223170A (en) * | 2017-12-19 | 2018-06-29 | 江苏科技大学 | One kind is stopped in emergency circuit and its implementation |
| CN108736446A (en) * | 2018-05-29 | 2018-11-02 | 广东威灵电机制造有限公司 | Guard method, protection system and the permanent magnet synchronous motor of permanent magnet synchronous motor |
| CN109639188A (en) * | 2018-12-03 | 2019-04-16 | 四川虹美智能科技有限公司 | A kind of the motor stopping method and controller of washing machine |
| CN110685117A (en) * | 2019-11-05 | 2020-01-14 | 四川虹美智能科技有限公司 | Motor control method, drive plate and washing machine |
| CN110912469A (en) * | 2018-09-18 | 2020-03-24 | 广东威灵电机制造有限公司 | Fault protection shutdown method and fault protection module |
-
2020
- 2020-05-21 CN CN202010436955.7A patent/CN111676646A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040046212A (en) * | 2002-11-26 | 2004-06-05 | 엘지전자 주식회사 | method for braking motor in dehydration cycle of washing machine |
| CN105281634A (en) * | 2014-07-21 | 2016-01-27 | 苏州伟创电气设备技术有限公司 | Motor demagnetization method and apparatus |
| CN106480641A (en) * | 2015-08-28 | 2017-03-08 | 无锡飞翎电子有限公司 | The fault diagnosis of washing machine and restorative procedure |
| JP2017093534A (en) * | 2015-11-19 | 2017-06-01 | パナソニックＩｐマネジメント株式会社 | Washing machine |
| CN105656370A (en) * | 2016-03-09 | 2016-06-08 | 广东美的制冷设备有限公司 | Air conditioner and shutdown control method and device for compressor of air conditioner |
| CN106685271A (en) * | 2016-08-05 | 2017-05-17 | 湖南利能科技股份有限公司 | Running state control method of brushless double-fed motor |
| CN108223170A (en) * | 2017-12-19 | 2018-06-29 | 江苏科技大学 | One kind is stopped in emergency circuit and its implementation |
| CN108736446A (en) * | 2018-05-29 | 2018-11-02 | 广东威灵电机制造有限公司 | Guard method, protection system and the permanent magnet synchronous motor of permanent magnet synchronous motor |
| CN110912469A (en) * | 2018-09-18 | 2020-03-24 | 广东威灵电机制造有限公司 | Fault protection shutdown method and fault protection module |
| CN109639188A (en) * | 2018-12-03 | 2019-04-16 | 四川虹美智能科技有限公司 | A kind of the motor stopping method and controller of washing machine |
| CN110685117A (en) * | 2019-11-05 | 2020-01-14 | 四川虹美智能科技有限公司 | Motor control method, drive plate and washing machine |
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Application publication date: 20200918 |