CN1567695A - Motor control method of washing machine under interrupting condition - Google Patents
Motor control method of washing machine under interrupting condition Download PDFInfo
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- CN1567695A CN1567695A CN 03130330 CN03130330A CN1567695A CN 1567695 A CN1567695 A CN 1567695A CN 03130330 CN03130330 CN 03130330 CN 03130330 A CN03130330 A CN 03130330A CN 1567695 A CN1567695 A CN 1567695A
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- supply voltage
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Abstract
The invention is a method of controlling the electric machine of a washer without interruption of power supply, and its characteristic: it has a power supply voltage sensing part, an electric machine, a driving structure able to supply power to the electric machine or invert the voltage of the electric machine, a braking structure and a microcomputer, and it includes the stages: the microcomputer senses the power supply voltage value according to the sensing part; the microcomputer judges if the power supply voltage drops under the set value; if it does, the microcomputer will control the driving structure to invert the voltage and simultaneously control the braking structure to stop the electric machine. It can sense the interruption of power supply caused by plug drop, power failure, etc, and by this, controls the electric machine, thus eliminating the dangerous factor caused by high-speed rotation of the washing tank.
Description
Technical field
The present invention relates to the motor control method of a kind of washing machine under powering-off state.
Background technology
In general, the drive circuit of washing machine as shown in Figure 1, it comprises to form the lower part, i.e. rectification part (11), it is used for power supply commonly used is carried out rectification; Motor (12) is to be used for providing revolving force to the sink of washing machine and blender etc.; Drive division (13), be to constitute by several IGBT (Insulating GateBipolar Transistor), it can be with the 1st pattern (mode) and the 2nd mode activated, wherein the 1st pattern is meant to above-mentioned motor (12) provides 3 phase power supplys, the 2nd pattern is that to instigate above-mentioned IGBT to become reverse, thereby the voltage inversion that will produce by the rotation of above-mentioned motor (12) is to circuit; SMPS (Switching Mode Power Supply) (14), it can become the voltage transitions of rectification part (11) output setting voltage (5V) back output; Velocity transducer (15) is the rotary speed that is used for detecting above-mentioned motor (12); Voltage sense part (16) is the supply voltage value (level) that is used for detecting by above-mentioned rectification part (11) output; Brake resistance (Rb) is to convert the electric energy that generating voltage consumed that the motor (12) of inversion takes place to heat in above-mentioned drive division (13), thereby prevents the circuit damage; Transistor (transistor) is to be used for driving brake resistance (Rb) (T1); Microcomputer (micom) (17) is the degree that can carry out according to the action command or the stroke of user's input, utilizes the output of above-mentioned velocity transducer (15) and voltage sense part (16) to control above-mentioned drive division (13) and transistor.
The course of work to the drive circuit of washing machine with said structure is described as follows below:
At first, if the user has imported washing commands, microcomputer (17) will controlling and driving portion (13) make it with the 1st mode operation so, thereby motor (12) is rotated with conforming to the washing decimal coded (algorism) that has configured, make the rotation of sink or blender, thereby can realize washing, rinsing and dehydration.
And microcomputer (17) can monitor the rotary speed of motor (12) by velocity transducer (15), and can control the speed of motor (12) so that it meets present decimal coded (algorism).
In addition, in the process of washing or dehydration, if being opened or importing, door stops action command, that it is become is reverse for microcomputer (17) each IGBT that will control above-mentioned drive division (13) so, thereby make above-mentioned drive division (13) with the 2nd mode operation, and make above-mentioned transistor (T1) start (ON), thereby drive brake resistance (Rb).
Under the effect of the reverse control of drive division (13), the above-mentioned brake resistance (Rb) that the voltage that is produced by motor (12) can be loaded into after via drive division (13) goes up and the electric energy that is consumed is converted to heat, meanwhile, motor (12) begins braking under the effect of the electric consumption that above-mentioned brake resistance (Rb) is produced.
The prerequisite of the Electric Machine Control of aforesaid washing machine is: microcomputer (17) energized, thus can realize the mode switch of above-mentioned drive division (13) and drive brake resistance (Rb).Attaching plug comes off or situation about having a power failure suddenly when taking place, or supply voltage drops to about 50V when following, provide the output voltage of the SMPS (14) of driving voltage can drop to below the 5V to microcomputer (17), so, microcomputer (17) will restart (reset), and aforesaid Electric Machine Control also just can't realize.
For instance, when in the process of dehydration, motor (12) high speed rotating, be that sink is under the situation of high speed rotating, if above-mentioned control can't realize that sink just can't be realized braking under the effect of external force so, so it will rotate freely for a long time.
Summary of the invention
For overcome existing washing machine take place that attaching plug comes off or situation about having a power failure under, owing to can not realize control for load, particularly under the situation of dewatering, owing to can not stop the high speed rotating of sink, thereby may damage the user and have safe problem, the invention provides the motor control method of a kind of washing machine under powering-off state, it is under powering-off state, can perceive because of attaching plug and come off and power failure etc. is former thereby the situation of the outage that causes, and control motor in view of the above, thereby eliminate the sink high speed rotating and the factor of the danger that brings.
The technical solution adopted for the present invention to solve the technical problems is:
The motor control method of a kind of washing machine under powering-off state, have supply voltage sense part, motor, can to motor power supply is provided or can make the voltage inversion that motor produces Drive Structure, the power consumption of inversion the effect by Drive Structure can be taken place, thereby brake structure and microcomputer that the rotation of motor is stopped; It is characterized in that it comprised with the next stage, promptly microcomputer comes the stage of perception supply voltage value (level) by the supply voltage sense part; Whether microcomputer drops to the stage of judging below the setting voltage value to supply voltage; Dropped to below the setting voltage value if judged result is a supply voltage, microcomputer is with regard to the controlling and driving structure so, and makes motor produce the voltage inversion, control brake structure meanwhile, thereby the stage that motor is stopped.
The motor control method of described washing machine under powering-off state, wherein setting voltage is to make microcomputer keep the minimum voltage of operate condition.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the composition frame chart of the drive circuit of conventional laundry apparatus
Fig. 2 is the flow chart of the motor control method of washing machine of the present invention under powering-off state
Fig. 3 is the change in voltage curve chart of motor control method shown in Figure 2
Embodiment
A preferred embodiment to the motor control method of washing machine of the present invention under powering-off state is described in detail with reference to the accompanying drawings.
Below with reference to Fig. 2 and Fig. 3, the present invention is illustrated at the motor control method under the powering-off state.At first, the microcomputer of washing machine (17) is controlled above-mentioned drive division (13) according to the action command that the user imported makes it with the 1st mode operation, thereby makes washing machine realize processes such as washing, rinsing and dehydration according to the decimal coded of having set (algorism).
And microcomputer (17) can also pass through the speed of velocity transducer (15) control motor (12), so that it is fit to corresponding stroke (algorism).
In addition, microcomputer (17) can also perceive supply voltage (S21) in real time.
Next, microcomputer (17) is judged (S22) below will whether having dropped to setting voltage (as 5V) to present supply voltage.
Here, setting voltage need be to make microcomputer (17) not restart and keep the minimum voltage of operate condition.
If above-mentioned judged result (S22), as shown in Figure 3, supply voltage has dropped to below the setting voltage value, and microcomputer (17) will be converted to the 2nd pattern with above-mentioned drive division (13) so, and control above-mentioned transistor (T1), thereby drive brake resistance (Rb) (S23).
At this moment, the voltage that rotation by motor (12) produces can pass through the IGBT inversion of drive division (13) to circuit, under the effect of above-mentioned inverter voltage, SMPS (14) begins action, thereby make microcomputer (17) keep operate condition, and can make above-mentioned drive division (13) and brake resistance (Rb) also keep operate condition.
Next, under the effect of brake resistance (Rb), the voltage that inversion has taken place in drive division (13) can convert the electric energy that consumes to heat, reduces gradually as shown in Figure 3, and therefore final motor (12) can stop slowly.
In addition, if above-mentioned judged result (S22) be supply voltage more than setting voltage value, so present ongoing stroke just also can be proceeded (S24).
Therefore, even washing machine comes off because of attaching plug or power failure etc. is former thereby the situation of outage takes place, also can eliminate the danger that brings because of present ongoing strokes such as sink high speed rotating in advance in the process of operation by the present invention.
The effect of invention
The motor control method of washing machine of the present invention under powering-off state can perceive because of attaching plug and take off Fall or power failure etc. is former thereby the powering-off state that causes, thus can eliminate in advance Wash tub High Rotation Speed etc. and The hazards of bringing, thereby the security that can improve washing machine.
Claims (2)
1, the motor control method of a kind of washing machine under powering-off state, have supply voltage sense part, motor, can to motor power supply is provided or can make the voltage inversion that motor produces Drive Structure, the power consumption of inversion the effect by Drive Structure can be taken place, thereby brake structure and microcomputer that the rotation of motor is stopped; It is characterized in that it comprises that with the next stage promptly microcomputer comes the stage of perception supply voltage value (1evel) by the supply voltage sense part; Whether microcomputer drops to the stage of judging below the setting voltage value to supply voltage; Dropped to below the setting voltage value if judged result is a supply voltage, microcomputer is with regard to the controlling and driving structure so, and makes motor produce the voltage inversion, control brake structure meanwhile, thereby the stage that motor is stopped.
2, the motor control method of washing machine according to claim 1 under powering-off state is characterized in that described setting voltage is to make microcomputer keep the minimum voltage of operate condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03130330 CN1567695A (en) | 2003-06-30 | 2003-06-30 | Motor control method of washing machine under interrupting condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03130330 CN1567695A (en) | 2003-06-30 | 2003-06-30 | Motor control method of washing machine under interrupting condition |
Publications (1)
| Publication Number | Publication Date |
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| CN1567695A true CN1567695A (en) | 2005-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03130330 Pending CN1567695A (en) | 2003-06-30 | 2003-06-30 | Motor control method of washing machine under interrupting condition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532221A (en) * | 2018-04-09 | 2018-09-14 | 海信（山东）冰箱有限公司 | A kind of control method, device and the washing machine of laundry machine dehydration clutch |
-
2003
- 2003-06-30 CN CN 03130330 patent/CN1567695A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532221A (en) * | 2018-04-09 | 2018-09-14 | 海信（山东）冰箱有限公司 | A kind of control method, device and the washing machine of laundry machine dehydration clutch |
| CN108532221B (en) * | 2018-04-09 | 2021-06-15 | 海信（山东）冰箱有限公司 | Control method and device for dewatering clutch of washing machine and washing machine |
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Effective date of abandoning: 20050119 |
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