CN109713982A - A kind of frequency conversion control circuit for reducing drain motor noise - Google Patents
A kind of frequency conversion control circuit for reducing drain motor noise Download PDFInfo
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- CN109713982A CN109713982A CN201811576458.6A CN201811576458A CN109713982A CN 109713982 A CN109713982 A CN 109713982A CN 201811576458 A CN201811576458 A CN 201811576458A CN 109713982 A CN109713982 A CN 109713982A
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- drain motor
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- frequency
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 230000005611 electricity Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004851 dishwashing Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Control Of Ac Motors In General (AREA)
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Abstract
The invention discloses a kind of frequency conversion control circuits for reducing drain motor noise, including power supply input circuit, current detection circuit, voltage detecting circuit, power-sensing circuit, detection circuit of power factor, control circuit and frequency changer circuit, the present invention passes through current detection circuit for reducing the frequency conversion control circuit of drain motor noise, voltage detecting circuit, power-sensing circuit, detection circuit of power factor is measured in real time drain motor, according to the current signal detected, voltage signal, power signal, power factor signal judges the operating status of drain motor, when in the cavity of drain motor operation being full water, control circuit exports alternating current discharge hydroelectric machine by frequency changer circuit, drain motor is allowed to work normally, when non-full water in the cavity of drain motor operation, control circuit reduces output by frequency changer circuit and gives The ac frequency of drain motor reduces the velocity of rotation of drain motor, and this reduces the noises of drain motor.
Description
Technical field
The present invention relates to drain motor control technology field, it is related specifically to make an uproar on household electrical appliance for reducing drain motor
The frequency conversion control circuit of sound.
Background technique
When drain motor in the equipment such as washing machine or dish-washing machine in the prior art works in the cavity for filling water,
When impeller on drain motor is run in the cavity, when the intracorporal water of chamber is not full water, air can form very big in the cavity
Noise, and the prior art can't detect the operating condition of drain motor, cause the noise of drain motor very big, influence whether people
Normal life.
Summary of the invention
To solve the above-mentioned problems, the purpose of the present invention is to provide a kind of frequency conversion controls for reducing drain motor noise
Circuit processed.
The technical solution for realizing the aim of the invention is as follows:
Preferably, a kind of frequency conversion control circuit for reducing drain motor noise, which is characterized in that include power input electricity
Road, current detection circuit, control circuit and frequency changer circuit, the input terminal of the current detection circuit and the power supply input circuit
It is connected, the output end of the current detection circuit is connected with the input terminal of the control circuit, the current detection circuit
For detecting the operating current of drain motor, and the current signal that will test is transmitted to the control circuit, the control circuit
Output end be connected with the input terminal of the frequency changer circuit, the input terminal of the frequency changer circuit and the power supply input circuit phase
Connection, the output end of the frequency changer circuit are connected with the drain motor power supply line input terminal, and the control circuit passes through control
The output ac frequency of the frequency changer circuit is made to control the revolving speed of the drain motor, reduces the noise of drain motor.
Preferably, the frequency conversion control circuit for reducing drain motor noise also includes voltage detecting circuit, institute
The input terminal for stating voltage detecting circuit is connected with the power supply input circuit, the output end of the voltage detecting circuit with it is described
The input terminal of control circuit is connected, and the voltage detecting circuit is used to detect the operating voltage of drain motor, and will test
Voltage signal is transmitted to the control circuit.
Preferably, the frequency conversion control circuit for reducing drain motor noise also includes power-sensing circuit, institute
The input terminal for stating power-sensing circuit is connected with the power supply input circuit, the output end of the power-sensing circuit with it is described
The input terminal of control circuit is connected, and the power-sensing circuit is used to detect power when drain motor work, and will test
Power signal transmissions to the control circuit.
Preferably, the frequency conversion control circuit for reducing drain motor noise also includes power factor detection electricity
Road, the input terminal of the detection circuit of power factor are connected with the power supply input circuit, the detection circuit of power factor
Output end be connected with the input terminal of the control circuit, the detection circuit of power factor for detect drain motor work
When power factor, and the power factor signal that will test is transmitted to the control circuit.
Compared with prior art, the present invention having the advantage that
The present invention can be by current detection circuit, voltage detecting circuit, power-sensing circuit, detection circuit of power factor
Any one is measured in real time drain motor, according to detect current signal, voltage signal, power signal, power because
Any one in number signals judges the operating status of drain motor, i.e., judge be in cavity that drain motor is run full water also
It is non-full water, when being full water, control circuit exports alternating current plumbing by frequency changer circuit in the cavity of drain motor operation
Motor allows drain motor to work normally, and when non-full water in the cavity of drain motor operation, control circuit is dropped by frequency changer circuit
The ac frequency of low output discharge hydroelectric machine, reduces the velocity of rotation of drain motor, this reduces making an uproar for drain motor
Sound.
Detailed description of the invention
Fig. 1 is the schematic diagram of the frequency conversion control circuit of the invention for reducing drain motor noise.
Specific embodiment
Below with reference to the attached drawing 1 in the present invention, the technical solution in the present invention is described.
Embodiment 1:
As shown in Figure 1, a kind of frequency conversion control circuit for reducing drain motor noise, is examined comprising power supply input circuit, electric current
Slowdown monitoring circuit, control circuit and frequency changer circuit, the input terminal of the current detection circuit are connected with the power supply input circuit, institute
The output end for stating current detection circuit is connected with the input terminal of the control circuit, and the current detection circuit is for the row of detection
The operating current of hydroelectric machine, and the current signal that will test is transmitted to the control circuit, the output end of the control circuit with
The input terminal of the frequency changer circuit is connected, and the input terminal of the frequency changer circuit is connected with the power supply input circuit, described
The output end of frequency changer circuit is connected with the drain motor power supply line input terminal, and the control circuit is according to the electric current detected
Signal controls the output of the frequency changer circuit, the control circuit by control the output ac frequency of the frequency changer circuit come
The revolving speed for controlling the drain motor reduces the noise of drain motor.
Embodiment 2:
As shown in Figure 1, on the basis of embodiment 1, the frequency conversion control circuit for reducing drain motor noise also wraps
Containing voltage detecting circuit, the input terminal of the voltage detecting circuit is connected with the power supply input circuit, the voltage detecting
The output end of circuit is connected with the input terminal of the control circuit, and the voltage detecting circuit is used to detect the work of drain motor
The voltage signal making voltage, and will test is transmitted to the control circuit；The control circuit is according to the voltage signal detected
The output of the frequency changer circuit is controlled, the control circuit is controlled by controlling the output ac frequency of the frequency changer circuit
The revolving speed of the drain motor reduces the noise of drain motor.
Embodiment 3:
As shown in Figure 1, the frequency conversion control circuit for reducing drain motor noise also wraps on the basis of embodiment 2
Containing power-sensing circuit, the input terminal of the power-sensing circuit is connected with the power supply input circuit, the power detection
The output end of circuit is connected with the input terminal of the control circuit, and the power-sensing circuit is for detecting drain motor work
When power, and the power signal transmissions that will test are to the control circuit；The control circuit is believed according to the power detected
The output of number control frequency changer circuit, the control circuit are controlled by controlling the output ac frequency of the frequency changer circuit
The revolving speed for making the drain motor reduces the noise of drain motor.
Embodiment 4:
As shown in Figure 1, the frequency conversion control circuit for reducing drain motor noise also wraps on the basis of embodiment 3
Containing detection circuit of power factor, the input terminal of the detection circuit of power factor is connected with the power supply input circuit, described
The output end of detection circuit of power factor is connected with the input terminal of the control circuit, and the detection circuit of power factor is used for
Power factor when drain motor work is detected, and the power factor signal that will test is transmitted to the control circuit；The control
Circuit processed controls the output of the frequency changer circuit according to the power factor signal detected, and the control circuit passes through described in control
The output ac frequency of frequency changer circuit controls the revolving speed of the drain motor, reduces the noise of drain motor.
The present invention for reducing the frequency conversion control circuit of drain motor noise working principle:
Control circuit controls frequency changer circuit and exports alternating current discharge hydroelectric machine, so that drain motor works, passes through current detecting electricity
Road, voltage detecting circuit, power-sensing circuit, any one in detection circuit of power factor examine drain motor in real time
It surveys, judges to drain according to the current signal, voltage signal, power signal, any one in power factor signal that detect
The operating status of motor judges it is full water or non-full water in the cavity of drain motor operation, when the chamber of drain motor operation
When being in vivo full water, control circuit exports alternating current discharge hydroelectric machine by frequency changer circuit, allows drain motor to work normally, works as row
In the cavity of hydroelectric machine operation when non-full water, control circuit reduces the alternating current frequency of output discharge hydroelectric machine by frequency changer circuit
Rate reduces the velocity of rotation of drain motor, and this reduces the noises of drain motor.
In conclusion the present invention passes through current detection circuit, electricity for reducing the frequency conversion control circuit of drain motor noise
Pressure detection circuit, power-sensing circuit, any one in detection circuit of power factor are measured in real time drain motor, root
Drain motor is judged according to the current signal, voltage signal, power signal, any one in power factor signal that detect
Operating status judges that in the cavity of drain motor operation be full water or non-full water, when being in the cavity of drain motor operation
When full water, control circuit exports alternating current discharge hydroelectric machine by frequency changer circuit, allows drain motor to work normally, works as drain motor
In the cavity of operation when non-full water, control circuit reduces the ac frequency of output discharge hydroelectric machine by frequency changer circuit, reduces
The velocity of rotation of drain motor, this reduces the noises of drain motor.
Particular embodiments described above, pair present invention solves the technical problem that, technical scheme and beneficial effects carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to this
Invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this hair
Within bright protection scope.
Claims (4)
1. a kind of frequency conversion control circuit for reducing drain motor noise, which is characterized in that include power supply input circuit, electric current
Detection circuit, control circuit and frequency changer circuit, the input terminal of the current detection circuit are connected with the power supply input circuit,
The output end of the current detection circuit is connected with the input terminal of the control circuit, and the current detection circuit is for detecting
The operating current of drain motor, and the current signal that will test is transmitted to the control circuit, the output end of the control circuit
It is connected with the input terminal of the frequency changer circuit, the input terminal of the frequency changer circuit is connected with the power supply input circuit, institute
The output end for stating frequency changer circuit is connected with the drain motor power supply line input terminal, and the control circuit is by controlling the change
The output ac frequency of frequency circuit controls the revolving speed of the drain motor, reduces the noise of drain motor.
2. a kind of frequency conversion control circuit for reducing drain motor noise according to claim 1, which is characterized in that institute
The frequency conversion control circuit for reducing drain motor noise stated also includes voltage detecting circuit, the voltage detecting circuit it is defeated
Enter end to be connected with the power supply input circuit, the input terminal phase of the output end of the voltage detecting circuit and the control circuit
Connection, the voltage detecting circuit are used to detect the operating voltage of drain motor, and the voltage signal that will test be transmitted to it is described
Control circuit.
3. a kind of frequency conversion control circuit for reducing drain motor noise according to claim 1 or 2, feature exist
In the frequency conversion control circuit for reducing drain motor noise also includes power-sensing circuit, the power detection electricity
The input terminal on road is connected with the power supply input circuit, and the output end of the power-sensing circuit is defeated with the control circuit
Enter end to be connected, the power-sensing circuit is used to detect power when drain motor work, and the power signal that will test passes
Transport to the control circuit.
4. a kind of frequency conversion control circuit for reducing drain motor noise according to claim 1 or 2 or 3, feature
It is, the frequency conversion control circuit for reducing drain motor noise also includes detection circuit of power factor, the power
The input terminal of factor detection circuit is connected with the power supply input circuit, the output end of the detection circuit of power factor and institute
The input terminal for stating control circuit is connected, the detection circuit of power factor be used for detect drain motor work when power because
Number, and the power factor signal that will test is transmitted to the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811576458.6A CN109713982A (en) | 2018-12-22 | 2018-12-22 | A kind of frequency conversion control circuit for reducing drain motor noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811576458.6A CN109713982A (en) | 2018-12-22 | 2018-12-22 | A kind of frequency conversion control circuit for reducing drain motor noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109713982A true CN109713982A (en) | 2019-05-03 |
Family
ID=66255943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811576458.6A Pending CN109713982A (en) | 2018-12-22 | 2018-12-22 | A kind of frequency conversion control circuit for reducing drain motor noise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109713982A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350630A (en) * | 2020-09-30 | 2021-02-09 | 无锡小天鹅电器有限公司 | Drainage pump control method, device, equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204013310U (en) * | 2014-07-31 | 2014-12-10 | 湖南工程学院 | Brushless dual-feed motor direct Torque Control |
| CN204993150U (en) * | 2015-09-30 | 2016-01-20 | 浙江迈雷科技有限公司 | Air conditioner coil pipe fan drive ware |
| CN106130428A (en) * | 2016-07-29 | 2016-11-16 | 惠而浦（中国）股份有限公司 | A kind of speed detection method of use in washing machine position-sensor-free variable-frequency direct-drive motor |
-
2018
- 2018-12-22 CN CN201811576458.6A patent/CN109713982A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204013310U (en) * | 2014-07-31 | 2014-12-10 | 湖南工程学院 | Brushless dual-feed motor direct Torque Control |
| CN204993150U (en) * | 2015-09-30 | 2016-01-20 | 浙江迈雷科技有限公司 | Air conditioner coil pipe fan drive ware |
| CN106130428A (en) * | 2016-07-29 | 2016-11-16 | 惠而浦（中国）股份有限公司 | A kind of speed detection method of use in washing machine position-sensor-free variable-frequency direct-drive motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350630A (en) * | 2020-09-30 | 2021-02-09 | 无锡小天鹅电器有限公司 | Drainage pump control method, device, equipment and storage medium |
| CN112350630B (en) * | 2020-09-30 | 2022-05-10 | 无锡小天鹅电器有限公司 | Drainage pump control method, device, equipment and storage medium |
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Application publication date: 20190503 |
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