CN208707521U - Power supply device and electric appliance and filter circuit - Google Patents
Power supply device and electric appliance and filter circuit Download PDFInfo
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- CN208707521U CN208707521U CN201821622027.4U CN201821622027U CN208707521U CN 208707521 U CN208707521 U CN 208707521U CN 201821622027 U CN201821622027 U CN 201821622027U CN 208707521 U CN208707521 U CN 208707521U
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Abstract
The utility model discloses power supply devices and electric appliance and filter circuit, wherein power supply device includes rectification circuit, filter circuit and Switching Power Supply, and rectification circuit is connected with power input, for rectifying to input signal, exports rectified signal；Filter circuit is connected with rectification circuit, for being filtered to rectified signal, exports filtering signal, filter circuit includes multiple RC filter units, wherein multiple RC filter units are connected in series；Switching Power Supply is connected with filter circuit, for being handled filtering signal with output loading electricity consumption.The power supply device and electric appliance and filter circuit of the utility model can be improved the resistance to pressure of filter circuit, more effectively resist the impact as caused by supply variation, structure is simple, is suitable for production by the way that multistage RC filter unit is arranged.
Description
Technical field
The utility model belongs to the technical field of electrical appliances manufacturing more particularly to a kind of power supply device, and fills including the power supply
The electric appliance and filter circuit set.
Background technique
Current rectifying and wave filtering circuit has vital influence, and filtered electrical in the reliability of electric appliance and in terms of the service life
The appearance service life is often depending on voltage, ripple current, temperature rise, and various countries, each department grid voltage quality are different, in power grid matter
The area of difference is measured, filter capacitor leads to filter capacitor over-voltage and lose because impacting for a long time by power network fluctuation, non-linear regulated power supply
The case of effect is also numerous.Also, often volume is big for high voltage bearing capacitor, is unsuitable for producing, complex process, is not relied by parent.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.
For this purpose, first purpose of the utility model is to propose a kind of power supply device, which can be improved filter
The pressure-resistant performance of wave circuit, structure is simple, is readily produced.
Second purpose of the utility model is to propose a kind of electric appliance including above-mentioned power supply device.
The third purpose of the utility model is to propose a kind of filter circuit.
In order to achieve the above object, the power supply device of the utility model first aspect embodiment, comprising: rectification circuit, institute
It states rectification circuit to be connected with power input, for rectifying to input signal, exports rectified signal；Filter circuit, the filter
Wave circuit is connected with the rectification circuit, for being filtered to the rectified signal, exports filtering signal, the filter circuit
Including multiple RC filter units, wherein multiple RC filter units are connected in series；Switching Power Supply, the Switching Power Supply and institute
It states filter circuit to be connected, for handling with output loading electricity consumption the filtering signal.
According to the power supply device of the utility model embodiment, by filter circuit be arranged multiple concatenated RC filter units come
It realizes filtering, total resistance to pressure of filter circuit can be improved, avoid filtering failure because supply variation causes over-voltage, structure letter
It is single, it is small in size to be readily produced.
In some embodiments, the RC filter unit includes a capacitor and at least one resistance, wherein the capacitor
It is connect with the resistor coupled in parallel.
In some embodiments, at least one described resistance is multiple, and multiple resistance are connected in series or are connected in parallel
Or series and parallel combination connection.
In some embodiments, a RC filter unit is connected with power ground in multiple RC filter units, institute
Stating the RC filter unit includes first capacitor, first resistor and second resistance, wherein the first capacitor and described the
One resistance and the second resistance are connected in parallel, and the first resistor and the second resistance are connected in series, the first resistor
There is voltage sample output point between the second resistance, the voltage sample output point and the voltage of the Switching Power Supply are adopted
Sample end is connected.Resistance by sharing the RC filter unit connecting with power ground carries out voltage sample, can reduce sampled signal
On harmonic wave and surge voltage, be conducive to EMC improvement.
In some embodiments, one RC filter unit further includes the second capacitor, second capacitor and institute
Second resistance is stated to be connected in parallel.
In some embodiments, the capacitor of any one of RC filter unit in multiple RC filter units with appoint
Anticipate another RC filter unit capacitor pressure voltage ratio, equal to the resistance of any one RC filter unit
With the ratio of the resistance value of the resistance of another any RC filter unit.It is thus possible to realize equal in filter circuit
Pressure, it is ensured that the voltage value being applied on each filter capacitor does not exceed its pressure voltage.
In order to achieve the above object, the electric appliance of the utility model second aspect embodiment, including load and above example
The power supply device, the load are connected with the power supply device.
Power supply can be reduced by using the power supply device of above example according to the electric appliance of the utility model embodiment
It fluctuates and is impacted caused by the filtering pressure resistance to power supply, reliability improves.
In order to achieve the above object, the filter circuit of the utility model third aspect embodiment, the filter circuit include
Multiple RC filter units, wherein multiple RC filter units are connected in series.
Filtering can be improved by the multistage RC filter unit of design according to the filter circuit of the utility model embodiment
The resistance to pressure of circuit avoids filtering failure because supply variation causes over-voltage, and structure is simple, small in size to be readily produced.
In some embodiments, the RC filter unit includes a capacitor and at least one resistance, wherein the capacitor
It is connect with the resistor coupled in parallel.
In some embodiments, when the resistance is multiple, multiple resistance be connected in series or be connected in parallel or
Series and parallel combination connection.
In some embodiments, a RC filter unit is connected with power ground in multiple RC filter units, institute
Stating the RC filter unit includes first capacitor, first resistor and second resistance, wherein the first capacitor and described the
One resistance and the second resistance are connected in parallel, and the first resistor and the second resistance are connected in series, the first resistor
There is voltage sample output point, the voltage sampling port of the voltage sample output point and Switching Power Supply between the second resistance
It is connected.Resistance by sharing the RC filter unit connecting with power ground carries out voltage sample, can reduce in sampled signal
Harmonic wave and surge voltage are conducive to EMC improvement.
In some embodiments, one RC filter unit further includes the second capacitor, second capacitor and institute
Second resistance is stated to be connected in parallel.
In some embodiments, the capacitor of any one of RC filter unit in multiple RC filter units with appoint
Anticipate another RC filter unit capacitor pressure voltage ratio, equal to the resistance of any one RC filter unit
With the ratio of the resistance value of the resistance of another any RC filter unit.It is thus possible to realize equal in filter circuit
Pressure, it is ensured that the voltage value being applied on each filter capacitor does not exceed its pressure voltage.
Detailed description of the invention
Fig. 1 is the block diagram of the power supply device of one embodiment according to the present utility model；
Fig. 2 is the circuit and its connection schematic diagram of the power supply device of one embodiment according to the present utility model；
Fig. 3 is the block diagram of the electric appliance of one embodiment according to the present utility model；
Fig. 4 is the block diagram of the filter circuit of one embodiment according to the present utility model.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
Power supply device according to the utility model first aspect embodiment is described with reference to the accompanying drawings.
Fig. 1 is the block diagram of the power supply device of one embodiment according to the present utility model, as shown in Figure 1, the utility model
The power supply device 100 of embodiment includes rectification circuit 10, filter circuit 20 and Switching Power Supply 30.
Wherein, rectification circuit 10 is connected with power input such as mains electricity input end, defeated for rectifying to input signal
Rectified signal out；Filter circuit 20 is connected with rectification circuit 10, for being filtered to rectified signal, exports filtering signal.It is logical
Chang Di, filter circuit is realized by RC, LC form, however, the voltage endurance capability of the RC or LC filter circuit of single-stage is poor, for a long time
It is be easy to cause condenser failure by power network fluctuation, the impact of non-linear regulated power supply, and uses the volume of high voltage bearing capacitor very much not
It is easy to produce.In order to improve filter circuit resistance to pressure, in the embodiments of the present invention, filter circuit 20 is filtered including multiple RC
Unit 21, example as shown in figure 1 N number of, N is two or more, wherein multiple RC filter units 21 are connected in series, in other words, using more
The RC circuit of grade filters to realize, the resistance to pressure ratio of filter circuit 20 is equivalent to the sum of the pressure voltage of each RC filter unit 21, phase
Compared with single stage filtering, the voltage endurance capability of filter circuit 20 can be improved, reduce and filter failure caused by power network fluctuation, and RC electricity
Road is small in size compared to lc circuit.Switching Power Supply 30 is connected with filter circuit 20, for being handled filtering signal with defeated
Electricity consumption, the stability of proof load electricity consumption are loaded out.
According to the power supply device 100 of the utility model embodiment, multiple concatenated RC are arranged by filter circuit 20 and are filtered
Unit 21 filters to realize, the resistance to pressure of filter circuit 20 can be improved, avoid filtering failure because supply variation causes over-voltage,
Structure is simple, small in size to be readily produced.
Further, in embodiment, rectification circuit 10 can use bridge rectifier or other rectification circuits, such as
Shown in Fig. 2, for according to the circuit diagram of the power supply device of one embodiment of the utility model, wherein rectification circuit 10 includes two
Pole pipe D1, diode D2, diode D3 and diode D4, four diodes constitute bridge rectifier, and input terminal connects alternating current
Alternating current AC, output connection filter circuit 20, realizes the rectification to input signal.
In the embodiments of the present invention, RC filter unit 21 may include a capacitor and at least one resistance,
In, capacitor connection in parallel with a resistor.Specifically, the filtering pressure voltage of each RC filter unit 21 can be different, according to each
The difference of filter capacitor pressure resistance in RC filter unit 21, is divided by the parallel resistance of RC circuit.As shown in Fig. 2, RC
Filter unit 21 can be made of a capacitor and a resistor coupled in parallel, such as capacitor E1 and resistance R1 in Fig. 2, can also be by
One capacitor and multiple resistance composition, such as capacitor E2 and resistance R2 and resistance R3 in Fig. 2.
In some embodiments, when the resistance of RC filter unit 21 is multiple, multiple resistance can be connected in series, such as
Resistance R2 and resistance R3 in Fig. 2, are perhaps connected in parallel or series and parallel combination connection i.e. existing be connected in parallel and have series connection
The resistance of connection can specifically be selected according to pressure-resistant design requirement.
Specifically, by taking Fig. 2 circuit as an example, the cathode of capacitor E1 anode and diode D1 and diode D4, resistance R1
One end is connected, and the cathode of capacitor E1 is connected with the other end of resistance R1, and resistance R1 and capacitor E1 constitute the first RC filter unit.Electricity
Hold E2 and resistance R2, resistance R3 constitute the 2nd RC filter unit, and be connected in series with the first RC filter unit, is eventually connected to electricity
Source.Wherein, the sum of pressure voltage of capacitor E1 and capacitor E2 is greater than the impact electricity of power network fluctuation voltage or non-linear regulated power supply
Pressure is connected by the RC filter unit 21 of multiple low pressure resistances, the total pressure voltage of filter circuit 20 can be improved.
In embodiment, the capacitor of any one RC filter unit 21 in multiple RC filter units 21 and it is any another
The ratio of the pressure voltage of the capacitor of RC filter unit 21, equal to the resistance of any one RC filter unit 21 and this it is any another
The ratio of the resistance value of the resistance of RC filter unit 21.Such as shown in Fig. 2, the resistance to pressure ratio of capacitor E1 and capacitor E2 is equal to resistance R1
With the resistance value ratio of the sum of resistance R2, resistance R3, for example, if E1=500F, E2=100F, then E1/E2=5/1, then R1/
(R2+R3)=5/1, for the resistor coupled in parallel or tandem compound of RC filter unit 21 the case where, the resistance of RC filter unit 21
Resistance value is equivalent to the resistance value after connection in parallel or series, so as to realize the pressure in filter circuit 20, it is ensured that be applied to electricity
The voltage value held on E1 and capacitor E2 does not exceed its pressure voltage.
In the embodiments of the present invention, in multiple RC filter units 21 of filter circuit 20 RC filter unit with
Power ground is connected, the 2nd RC filter unit 21 as shown in Figure 2, which includes first capacitor E2, first resistor
R2 and second resistance R3, wherein first capacitor E2 is connected in parallel with first resistor R2 and second resistance R3, first resistor R2 and
Two resistance R3 are connected in series, and have voltage sample output point, voltage sample output point between first resistor R2 and second resistance R3
Be connected with the voltage sampling port of Switching Power Supply 30, for example, in Fig. 2 voltage sampling signal Vshunt input switch power supply 30 voltage
Sampling end, voltage sampling signal Vshunt can be used as the input signal of 30 over-voltage of Switching Power Supply or under-voltage protecting circuit, rise
To protective effect.
Further, as shown in Fig. 2, the RC filter unit 21 being connected with power ground further includes the second capacitor C2, the second electricity
Hold C2 and second resistance R3 to be connected in parallel, plays the role of sampling output filtering.Specifically, as shown in Fig. 2, first resistor R2
It connects and is divided with second resistance R3, second resistance R3 is connected in parallel with the second capacitor C2, first resistor R1, second resistance R2
Voltage sampling circuit is constituted with the second capacitor C2.Sample circuit shares the resistance of the RC filter unit 21 of connection power ground, due to
After the filtering of other RC filter units 21, harmonic wave and the surge partial pressure of voltage sampling signal can reduce, and be more conducive to out
The EMC in powered-down source 30 improves.
In short, the power supply device 100 of the utility model embodiment, filter circuit 20 are filtered by setting multistage RC
Filtering pressure resistance can be improved in unit 21, keeps out power network fluctuation or the impact of non-linear regulated power supply bring, and structure is simple,
Suitable for production, and, voltage collection circuit shares the resistance of the RC filter unit 21 of connection power ground, can reduce sampled signal
On harmonic wave and surge voltage, be conducive to EMC improve.
Power supply device based on the above embodiment is described with reference to the accompanying drawings according to the utility model second aspect embodiment
Electric appliance.
Fig. 3 is the block diagram of the electric appliance of one embodiment according to the present utility model, as shown in figure 3, the utility model is implemented
The electric appliance 1000 of example includes the power supply device 100 of load 200 and above example, and load 200 is connected with power supply device 100, electricity
Source device 100 carries out processing output loading electricity consumption to input signal such as alternating current etc., for 200 power supply of load.
It can be dropped according to the electric appliance 1000 of the utility model embodiment by using the power supply device 100 of above example
It is impacted caused by filtering pressure resistance of the low supply variation to power supply, reliability improves.
Filter circuit according to the utility model third aspect embodiment is described with reference to the accompanying drawings.
Fig. 4 is the block diagram of the filter circuit of one embodiment according to the present utility model, as shown in figure 4, the utility model
The filter circuit 20 of embodiment includes multiple RC filter units 21, wherein multiple RC filter units 21 are connected in series, and N indicates two
A or more RC filter unit.
It can be improved according to the filter circuit 20 of the utility model embodiment by the multistage RC filter unit 21 of design
The resistance to pressure of filter circuit 20 avoids filtering failure because supply variation causes over-voltage, and structure is simple, small in size to be readily produced.
Further, in embodiment, RC filter unit 21 includes a capacitor and at least one resistance, wherein capacitor
Connection in parallel with a resistor.Specifically, the filtering pressure voltage of each RC filter unit 21 can be different, filtered according to each RC single
The difference of filter capacitor pressure resistance in member 21, is divided by the parallel resistance of RC circuit.As shown in Fig. 2, RC filter unit
21 can be made of a capacitor and a resistor coupled in parallel, such as capacitor E1 and resistance R1 in Fig. 2, can also be by a capacitor
It is formed with multiple resistance, such as capacitor E2 and resistance R2 and resistance R3 in Fig. 2.
In some embodiments, when the resistance of RC filter unit 21 is multiple, multiple resistance can be connected in series, such as
Resistance R2 and resistance R3 in Fig. 2, are perhaps connected in parallel or series and parallel combination connection i.e. existing be connected in parallel and have series connection
The resistance of connection can specifically be selected according to pressure-resistant design requirement.
In embodiment, the capacitor of any one RC filter unit 21 in multiple RC filter units 21 and it is any another
The ratio of the pressure voltage of the capacitor of RC filter unit 21, equal to the resistance of any one RC filter unit 21 and this it is any another
The ratio of the resistance value of the resistance of RC filter unit 21.Such as shown in Fig. 2, the resistance to pressure ratio of capacitor E1 and capacitor E2 is equal to resistance R1
With the resistance value ratio of the sum of resistance R2, resistance R3, for example, if E1=500F, E2=100F, then E1/E2=5/1, then R1/
(R2+R3)=5/1, for the resistor coupled in parallel or tandem compound of RC filter unit 21 the case where, the resistance of RC filter unit 21
Resistance value is equivalent to the resistance value after connection in parallel or series, uniform in filter circuit 20 so as to realize, it is ensured that be applied to electricity
The voltage value held on E1 and capacitor E2 does not exceed its pressure voltage.
In the embodiments of the present invention, in multiple RC filter units 21 of filter circuit 20 RC filter unit with
Power ground is connected, the 2nd RC filter unit 21 as shown in Figure 2, which includes first capacitor E2, first resistor
R2 and second resistance R3, wherein first capacitor E2 is connected in parallel with first resistor R2 and second resistance R3, first resistor R2 and
Two resistance R3 are connected in series, and have voltage sample output point, voltage sample output point between first resistor R2 and second resistance R3
It is connected with the voltage sampling port of Switching Power Supply 30, which can be used as 30 over-voltage of Switching Power Supply or under-voltage protection electricity
The input signal on road, plays a protective role.
Further, as shown in Fig. 2, the RC filter unit 21 being connected with power ground further includes the second capacitor C2, the second electricity
Hold C2 and second resistance R3 to be connected in parallel, plays the role of sampling output filtering.
In short, the filter circuit 20 of the utility model embodiment, by the way that multistage RC filter unit 21 is arranged, compared to
Filtering pressure resistance can be improved in single stage filtering, keeps out power network fluctuation or the impact of non-linear regulated power supply bring, and structure letter
It is single, it is suitable for production, and the resistance for the RC filter unit 21 being connected with power ground can carry out dividing simultaneously output voltage sampling letter
Number to Switching Power Supply, it is that the EMC of Switching Power Supply improves, improves more accurate data.
It should be noted that in the description of this specification, reference term " one embodiment ", " is shown " some embodiments "
The description of example ", " specific example " or " some examples " etc. mean specific features described in conjunction with this embodiment or example, structure,
Material or feature are contained at least one embodiment or example of the utility model.In the present specification, to above-mentioned term
Schematic representation be necessarily directed to identical embodiment or example.Moreover, description specific features, structure, material or
Person's feature may be combined in any suitable manner in any one or more of the embodiments or examples.In addition, in not conflicting feelings
Under condition, those skilled in the art by different embodiments or examples described in this specification and different embodiment or can show
The feature of example is combined.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention,
It is a, three etc., unless otherwise specifically defined.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (13)
1. a kind of power supply device, which is characterized in that the power supply device includes:
Rectification circuit, the rectification circuit are connected with power input, for rectifying to input signal, export rectified signal；
Filter circuit, the filter circuit are connected with the rectification circuit, for being filtered to the rectified signal, output filter
Wave signal, the filter circuit include multiple RC filter units, wherein multiple RC filter units are connected in series；
Switching Power Supply, the Switching Power Supply are connected with the filter circuit, for being handled the filtering signal to export
Load electricity consumption.
2. power supply device according to claim 1, which is characterized in that the RC filter unit is including a capacitor and at least
One resistance, wherein the capacitor is connect with the resistor coupled in parallel.
3. power supply device according to claim 2, which is characterized in that at least one described resistance be it is multiple, it is multiple described
Resistance is connected in series or is connected in parallel or series and parallel combination connection.
4. power supply device according to claim 2, which is characterized in that a RC filter in multiple RC filter units
Wave unit is connected with power ground, and one RC filter unit includes first capacitor, first resistor and second resistance,
In, the first capacitor is connected in parallel with the first resistor and the second resistance, the first resistor and second electricity
Resistance is connected in series, and has voltage sample output point, the voltage sample output between the first resistor and the second resistance
Point is connected with the voltage sampling port of the Switching Power Supply.
5. power supply device according to claim 4, which is characterized in that one RC filter unit further includes second
Capacitor, second capacitor are connected in parallel with the second resistance.
6. power supply device according to claim 2, which is characterized in that any one institute in multiple RC filter units
The ratio for stating the pressure voltage of the capacitor of RC filter unit and the capacitor of another any RC filter unit, is equal to described any
The ratio of the resistance value of the resistance of the resistance of one RC filter unit and another any RC filter unit.
7. a kind of electric appliance, which is characterized in that the electric appliance includes load and power supply as claimed in any one of claims 1 to 6 dress
It sets, the load is connected with the power supply device.
8. a kind of filter circuit, which is characterized in that the filter circuit includes multiple RC filter units, wherein multiple RC
Filter unit is connected in series.
9. filter circuit according to claim 8, which is characterized in that the RC filter unit is including a capacitor and at least
One resistance, wherein the capacitor is connect with the resistor coupled in parallel.
10. filter circuit according to claim 9, which is characterized in that when the resistance is multiple, multiple resistance
It is connected in series or is connected in parallel or series and parallel combination connects.
11. filter circuit according to claim 9, which is characterized in that a RC in multiple RC filter units
Filter unit is connected with power ground, and one RC filter unit includes first capacitor, first resistor and second resistance,
In, the first capacitor is connected in parallel with the first resistor and the second resistance, the first resistor and second electricity
Resistance is connected in series, and has voltage sample output point, the voltage sample output between the first resistor and the second resistance
Point is connected with the voltage sampling port of Switching Power Supply.
12. filter circuit according to claim 11, which is characterized in that one RC filter unit further includes
Two capacitors, second capacitor are connected in parallel with the second resistance.
13. filter circuit according to claim 9, which is characterized in that any one in multiple RC filter units
The ratio of the pressure voltage of the capacitor of the capacitor of the RC filter unit and another any RC filter unit, is equal to described appoint
The ratio of the resistance value of the resistance of the resistance of one RC filter unit of meaning and another any RC filter unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821622027.4U CN208707521U (en) | 2018-09-30 | 2018-09-30 | Power supply device and electric appliance and filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821622027.4U CN208707521U (en) | 2018-09-30 | 2018-09-30 | Power supply device and electric appliance and filter circuit |
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| Publication Number | Publication Date |
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| CN208707521U true CN208707521U (en) | 2019-04-05 |
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| CN201821622027.4U Active CN208707521U (en) | 2018-09-30 | 2018-09-30 | Power supply device and electric appliance and filter circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110971112A (en) * | 2018-09-30 | 2020-04-07 | 广东美芝制冷设备有限公司 | Power supply device, electric appliance, and filter circuit |
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2018
- 2018-09-30 CN CN201821622027.4U patent/CN208707521U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110971112A (en) * | 2018-09-30 | 2020-04-07 | 广东美芝制冷设备有限公司 | Power supply device, electric appliance, and filter circuit |
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