CN204179941U - A kind of filter circuit and air conditioner for suppressing power to harass resonance peak - Google Patents
A kind of filter circuit and air conditioner for suppressing power to harass resonance peak Download PDFInfo
- Publication number
- CN204179941U CN204179941U CN201420526375.7U CN201420526375U CN204179941U CN 204179941 U CN204179941 U CN 204179941U CN 201420526375 U CN201420526375 U CN 201420526375U CN 204179941 U CN204179941 U CN 204179941U
- Authority
- CN
- China
- Prior art keywords
- capacitance
- resistance
- magnetic bead
- filter circuit
- damping unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model belongs to electronic circuit technology field, provides a kind of filter circuit and air conditioner for suppressing power to harass resonance peak.The utility model is by adopting the first Y capacitance for suppressing power to be harassed in the filter circuit of resonance peak, damping unit and the second Y capacitance, and damping unit comprises one or more resistance element, not only can suppress electromagnetic interference in multiple circuit module fast handover procedures of rear class, power can also be effectively suppressed to harass resonance peak, the Electro Magnetic Compatibility of air conditioner is enable to meet corresponding electromagnetic compatibility standard better, the electromagnetic interference that cannot both realize solved existing for prior art suppresses, the Electro Magnetic Compatibility of air conditioner can be made again to meet the problem of electromagnetic compatibility standard.
Description
Technical field
The utility model belongs to electronic circuit technology field, particularly relates to a kind of filter circuit and air conditioner for suppressing power to harass resonance peak.
Background technology
At present, when many household electrical appliance (as air conditioner) work, there is electromagnetic interference to a certain degree in internal circuit.For convertible frequency air-conditioner, its inside has the circuit module of this high voltage of such as compressor and circuit of power factor correction and big current, and these circuit modules can produce larger electromagnetic interference in fast handover procedures.Electromagnetic interference is usually expressed as differential mode interference and common mode disturbances, the path ratio of differential mode interference is easier to determine, the path then relative complex of common mode disturbances, complicated impedance network can be produced when particularly multiple interference source such as compressor, circuit of power factor correction and DC fan acts on simultaneously, this impedance network is in some frequency range, particularly in the frequency range that frequency is higher, easily produce larger resonance peak.
In order to suppress common mode disturbances, prior art forms return flow line (as shown in Figure 1) by adding a pair Y capacitance after common mode inductance to common mode disturbances, to realize the suppression to common mode interference signal, thus the Electro Magnetic Compatibility of air conditioner is made to meet the electromagnetic compatibility standard CISPR14 (frequency range of this prescribed by standard is 150KHz ~ 300MHz) of household appliances product.But, for above-mentioned formed return flow line, when carrying out power harassing and wrecking (frequency range of power harassing and wrecking is 30MHz ~ 300MHz) and testing, this return flow line easily produces power harassing and wrecking resonance peak in the frequency range of 30MHz to 40MHz, the generation of power harassing and wrecking resonance peak then can reduce the Electro Magnetic Compatibility of air conditioner, makes it be difficult to meet above-mentioned electromagnetic compatibility standard CISPR14.So prior art exists both cannot realize electromagnetic interference suppression, and the Electro Magnetic Compatibility of air conditioner can be made again to meet the problem of electromagnetic compatibility standard.
Utility model content
The utility model provides a kind of filter circuit for suppressing power to harass resonance peak, is intended to the electromagnetic interference that cannot both realize solved existing for prior art and suppresses, the Electro Magnetic Compatibility of air conditioner can be made again to meet the problem of electromagnetic compatibility standard.
The utility model realizes like this, a kind of filter circuit for suppressing power to harass resonance peak, it comprises resistance-capacitance network, common mode inductance and X electric capacity, the live wire end of described resistance-capacitance network and the first end of described common mode inductance are all connected to alternating current fire wire, the zero line side of described resistance-capacitance network and the 3rd end of described common mode inductance are all connected to alternating current zero line, described X electric capacity is connected between the second end of described common mode inductance and the 4th end, second end of described common mode inductance is connected power circuit with the 4th end, and described power circuit is that multiple circuit modules of rear class are powered;
Described filter circuit also comprises the first Y capacitance, damping unit and the second Y capacitance;
The first end of described first Y capacitance connects the second end of described common mode inductance, and described damping unit connects the second end of described first Y capacitance and the first end of described second Y capacitance, and described damping unit is also connected to ground; Described damping unit comprises one or more resistance element.
Another object of the present utility model is also to provide a kind of air conditioner, and it comprises power circuit, multiple circuit module and the above-mentioned filter circuit for suppressing power to harass resonance peak.
The utility model is by adopting the first Y capacitance for suppressing power to be harassed in the filter circuit of resonance peak, damping unit and the second Y capacitance, and damping unit comprises one or more resistance element, not only can suppress electromagnetic interference in multiple circuit module fast handover procedures of rear class, power can also be effectively suppressed to harass resonance peak, the Electro Magnetic Compatibility of air conditioner is enable to meet corresponding electromagnetic compatibility standard better, the electromagnetic interference that cannot both realize solved existing for prior art suppresses, the Electro Magnetic Compatibility of air conditioner can be made again to meet the problem of electromagnetic compatibility standard.
Accompanying drawing explanation
Fig. 1 is the structure chart of the filter circuit for suppressing electromagnetic interference involved by prior art;
Fig. 2 is the structure chart for suppressing power to harass the filter circuit of resonance peak that the utility model embodiment provides;
Fig. 3 is the exemplary circuit structure chart for suppressing power to harass the filter circuit of resonance peak that the utility model first embodiment provides;
Fig. 4 is the exemplary circuit structure chart for suppressing power to harass the filter circuit of resonance peak that the utility model second embodiment provides;
Fig. 5 is the exemplary circuit structure chart for suppressing power to harass the filter circuit of resonance peak that the utility model the 3rd embodiment provides;
Fig. 6 is the exemplary circuit structure chart for suppressing power to harass the filter circuit of resonance peak that the utility model the 4th embodiment provides;
Fig. 7 is the exemplary circuit structure chart for suppressing power to harass the filter circuit of resonance peak that the utility model the 5th embodiment provides;
Fig. 8 is the exemplary circuit structure chart for suppressing power to harass the filter circuit of resonance peak that the utility model the 6th embodiment provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Below with in air conditioner be applied as that example provides the utility model embodiment be described in detail for suppressing power to harass the filter circuit of resonance peak:
Air conditioner comprises each circuit module of filter circuit 100, power circuit 200 and rear class for suppressing power harassing and wrecking resonance peak.Fig. 2 shows the structure of filter circuit 100, and details are as follows:
Filter circuit 100 comprises resistance-capacitance network 101, common mode inductance L and X electric capacity Cx, the live wire end of resistance-capacitance network 101 and the first end 1 of common mode inductance L are all connected to alternating current fire wire L, the zero line side of resistance-capacitance network 101 and the 3rd end of common mode inductance L are all connected to alternating current zero line N, X electric capacity Cx is connected between second end 2 of common mode inductance L and the 4th end 4, second end 2 of common mode inductance L is connected power circuit 200 with the 4th end 4, and power circuit 200 is that multiple circuit modules of rear class are powered.Said multiple circuit module can be the circuit module of compressor, circuit of power factor correction or its high voltage, big current herein.
Filter circuit 100 also comprises the first Y capacitance Cy1, damping unit 102 and the second Y capacitance Cy2.
The first end of the first Y capacitance Cy1 connects second end 2 of common mode inductance L, and damping unit 102 connects second end of the first Y capacitance Cy1 and the first end of the second Y capacitance Cy2, and damping unit 102 is also connected to ground; Damping unit 102 comprises one or more resistance element.
The utility model embodiment is by adopting above-mentioned filter circuit, the electromagnetic interference produced by resistance-capacitance network 101 pairs of power circuits 200 carries out suppression process, the differential mode interference of X electric capacity Cx filtering input, common mode inductance L1, the first Y capacitance Cy1, damping unit 102 and the second Y capacitance Cy2 carry out filtering to common mode disturbances, and owing to there is resistance element in damping unit 102, so can also suppress produced power harassing and wrecking resonance peak.
In the utility model first embodiment, as shown in Figure 3, damping unit 102 comprises the first resistance R1 and the second resistance R2, the first end of the first resistance R1 connects second end of the first Y capacitance Cy1, second end of the first resistance R1 and the first end of the second resistance R2 are connected to ground altogether, and second end of the second resistance R2 connects the first end of the second Y capacitance Cy2.Wherein, the first resistance R1 and the second resistance R2 is resistance element.
In the utility model second embodiment, as shown in Figure 4, damping unit 102 comprises the first magnetic bead B1 and the second magnetic bead B2, the first end of the first magnetic bead B1 connects second end of the first Y capacitance Cy1, second end of the first magnetic bead B1 and the first end of the second magnetic bead B2 are connected to ground altogether, and second end of the second magnetic bead B2 connects the first end of the second Y capacitance Cy2.Wherein, the first magnetic bead B1 and the second magnetic bead B2 is resistance element.
In the utility model the 3rd embodiment, as shown in Figure 5, damping unit 102 comprises:
3rd resistance R3, the 3rd magnetic bead B3, the 4th magnetic bead B4 and the 4th resistance R4;
The first end of the 3rd resistance R3 connects second end of the first Y capacitance Cy1, second end of the 3rd resistance R3 connects the first end of the 3rd magnetic bead B3, second end of the 3rd magnetic bead B3 and the first end of the 4th magnetic bead B4 are connected to ground altogether, second end of the 4th magnetic bead B4 connects the first end of the 4th resistance R4, and second end of the 4th resistance R4 connects the first end of the second Y capacitance Cy2.Wherein, the 3rd resistance R3, the 3rd magnetic bead B3, the 4th magnetic bead B4 and the 4th resistance R4 are resistance element.
In the utility model the 4th embodiment, as shown in Figure 6, damping unit 102 comprises the 5th resistance R5, and the first end of the 5th resistance R5 connects second end of the first Y capacitance Cy1 and the first end of the second Y capacitance Cy2 simultaneously, and second end of the 5th resistance R5 is connected to ground.Wherein, the 5th resistance R5 is resistance element.
In the utility model the 5th embodiment, as shown in Figure 7, damping unit 102 comprises the 5th magnetic bead B5, and the first end of the 5th magnetic bead B5 connects second end of the first Y capacitance Cy1 and the first end of the second Y capacitance Cy2 simultaneously, and second end of the 5th magnetic bead B5 is connected to ground.Wherein, the 5th magnetic bead B5 is resistance element.
In the utility model the 6th embodiment, as shown in Figure 8, damping unit 102 comprises the 6th resistance R6 and the 6th magnetic bead B6, the first end of the 6th resistance R6 connects second end of the first Y capacitance Cy1 and the first end of the second Y capacitance Cy2, between the second end that the 6th magnetic bead B6 is connected to the 6th resistance R6 and ground simultaneously.Wherein, the 6th resistance R6 and the 6th magnetic bead B6 is resistance element.
In the utility model first embodiment in the 6th embodiment, due to the existence of the resistance element in damping unit 102, the common mode disturbances be made up of common mode inductance L, the first Y capacitance Cy1, damping unit 102 and the second Y capacitance Cy2 suppresses loop can also effectively suppress power to harass resonance peak, and then enable the Electro Magnetic Compatibility of air conditioner meet corresponding electromagnetic compatibility standard better, improve the overall performance of air conditioner.
In order to make filter circuit 100 can give full play to its to electromagnetic interference (comprising differential mode interference and common mode disturbances) and power harassing and wrecking resonance peak inhibitory action, the first above-mentioned Y capacitance Cy1 and the capacitance span of the second Y capacitance Cy2 can be preferably [100pF, 10nF]; The resistance span of the first above-mentioned resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6 can be preferably [1kohm, 10kohm], the first above-mentioned magnetic bead B1, the second magnetic bead B2, the 3rd magnetic bead B3, the 4th magnetic bead B4, the 5th magnetic bead B5 and the resistance span of the 6th magnetic bead B6 when resonance frequency is 30MHz can be preferably [1kohm, 10kohm].
The utility model embodiment is by adopting the first Y capacitance Cy1 for suppressing power to be harassed in the filter circuit 100 of resonance peak, damping unit 102 and the second Y capacitance Cy2, and damping unit 102 comprises one or more resistance element, not only can suppress electromagnetic interference in multiple circuit module fast handover procedures of rear class, power can also be effectively suppressed to harass resonance peak, the Electro Magnetic Compatibility of air conditioner is enable to meet corresponding electromagnetic compatibility standard better, the electromagnetic interference that cannot both realize solved existing for prior art suppresses, the Electro Magnetic Compatibility of air conditioner can be made again to meet the problem of electromagnetic compatibility standard.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (8)
1. the filter circuit for suppressing power to harass resonance peak, it comprises resistance-capacitance network, common mode inductance and X electric capacity, the live wire end of described resistance-capacitance network and the first end of described common mode inductance are all connected to alternating current fire wire, the zero line side of described resistance-capacitance network and the 3rd end of described common mode inductance are all connected to alternating current zero line, described X electric capacity is connected between the second end of described common mode inductance and the 4th end, second end of described common mode inductance is connected power circuit with the 4th end, and described power circuit is that multiple circuit modules of rear class are powered; It is characterized in that, described filter circuit also comprises the first Y capacitance, damping unit and the second Y capacitance;
The first end of described first Y capacitance connects the second end of described common mode inductance, and described damping unit connects the second end of described first Y capacitance and the first end of described second Y capacitance, and described damping unit is also connected to ground; Described damping unit comprises one or more resistance element.
2. filter circuit as claimed in claim 1, it is characterized in that, described damping unit comprises the first resistance and the second resistance, the first end of described first resistance connects the second end of described first Y capacitance, second end of described first resistance and the first end of described second resistance are connected to ground altogether, and the second end of described second resistance connects the first end of described second Y capacitance.
3. filter circuit as claimed in claim 1, it is characterized in that, described damping unit comprises the first magnetic bead and the second magnetic bead, the first end of described first magnetic bead connects the second end of described first Y capacitance, second end of described first magnetic bead and the first end of described second magnetic bead are connected to ground altogether, and the second end of described second magnetic bead connects the first end of described second Y capacitance.
4. filter circuit as claimed in claim 1, it is characterized in that, described damping unit comprises:
3rd resistance, the 3rd magnetic bead, the 4th magnetic bead and the 4th resistance;
The first end of described 3rd resistance connects the second end of described first Y capacitance, second end of described 3rd resistance connects the first end of described 3rd magnetic bead, second end of described 3rd magnetic bead and the first end of described 4th magnetic bead are connected to ground altogether, second end of described 4th magnetic bead connects the first end of described 4th resistance, and the second end of described 4th resistance connects the first end of described second Y capacitance.
5. filter circuit as claimed in claim 1, it is characterized in that, described damping unit comprises the 5th resistance, and the first end of described 5th resistance connects the second end of described first Y capacitance and the first end of described second Y capacitance simultaneously, and the second end of described 5th resistance is connected to ground.
6. filter circuit as claimed in claim 1, it is characterized in that, described damping unit comprises the 5th magnetic bead, and the first end of described 5th magnetic bead connects the second end of described first Y capacitance and the first end of described second Y capacitance simultaneously, and the second end of described 5th magnetic bead is connected to ground.
7. filter circuit as claimed in claim 1, it is characterized in that, described damping unit comprises the 6th resistance and the 6th magnetic bead, the first end of described 6th resistance connects the second end of described first Y capacitance and the first end of described second Y capacitance, between the second end that described 6th magnetic bead is connected to described 6th resistance and ground simultaneously.
8. an air conditioner, comprises power circuit and multiple circuit module, it is characterized in that, described air conditioner also comprises the filter circuit for suppressing power to harass resonance peak as described in any one of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420526375.7U CN204179941U (en) | 2014-09-12 | 2014-09-12 | A kind of filter circuit and air conditioner for suppressing power to harass resonance peak |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420526375.7U CN204179941U (en) | 2014-09-12 | 2014-09-12 | A kind of filter circuit and air conditioner for suppressing power to harass resonance peak |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204179941U true CN204179941U (en) | 2015-02-25 |
Family
ID=52568715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420526375.7U Active CN204179941U (en) | 2014-09-12 | 2014-09-12 | A kind of filter circuit and air conditioner for suppressing power to harass resonance peak |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204179941U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533153A (en) * | 2015-09-15 | 2017-03-22 | 广东美的生活电器制造有限公司 | Electromagnetic interference suppressing circuit of motor power and household electrical appliance |
| CN106545979A (en) * | 2016-12-09 | 2017-03-29 | 广东美的制冷设备有限公司 | Air-conditioner electric control gear and air-conditioner |
| CN107204704A (en) * | 2016-03-18 | 2017-09-26 | 广东美的生活电器制造有限公司 | Mixer and the electromagnetic interference suppression circuit for mixer |
| CN108156836A (en) * | 2015-10-07 | 2018-06-12 | 日本电产株式会社 | Electromagnetic noise suppression circuit |
| CN109861509A (en) * | 2018-12-07 | 2019-06-07 | 天津津航计算技术研究所 | A kind of electric source filter circuit inhibiting aeronautical data loading device electromagnetic interference |
| CN112910247A (en) * | 2021-01-25 | 2021-06-04 | 珠海格力电器股份有限公司 | Filter device and refrigerator |
| CN117060363A (en) * | 2023-10-10 | 2023-11-14 | 广东东菱电源科技有限公司 | Low-cost lightning-proof surge circuit |
-
2014
- 2014-09-12 CN CN201420526375.7U patent/CN204179941U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533153A (en) * | 2015-09-15 | 2017-03-22 | 广东美的生活电器制造有限公司 | Electromagnetic interference suppressing circuit of motor power and household electrical appliance |
| CN108156836A (en) * | 2015-10-07 | 2018-06-12 | 日本电产株式会社 | Electromagnetic noise suppression circuit |
| CN107204704A (en) * | 2016-03-18 | 2017-09-26 | 广东美的生活电器制造有限公司 | Mixer and the electromagnetic interference suppression circuit for mixer |
| CN107204704B (en) * | 2016-03-18 | 2020-12-22 | 广东美的生活电器制造有限公司 | Mixer and be used for electromagnetic interference suppression circuit of mixer |
| CN106545979A (en) * | 2016-12-09 | 2017-03-29 | 广东美的制冷设备有限公司 | Air-conditioner electric control gear and air-conditioner |
| CN109861509A (en) * | 2018-12-07 | 2019-06-07 | 天津津航计算技术研究所 | A kind of electric source filter circuit inhibiting aeronautical data loading device electromagnetic interference |
| CN112910247A (en) * | 2021-01-25 | 2021-06-04 | 珠海格力电器股份有限公司 | Filter device and refrigerator |
| CN117060363A (en) * | 2023-10-10 | 2023-11-14 | 广东东菱电源科技有限公司 | Low-cost lightning-proof surge circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204179941U (en) | A kind of filter circuit and air conditioner for suppressing power to harass resonance peak | |
| CN203933387U (en) | A kind of for suppressing filter circuit and the air conditioner of electromagnetic interference | |
| CN101651408A (en) | Filtering module inhibiting common mode noise and differential mode noise | |
| CN202679197U (en) | DC permanent magnetism brush motor | |
| CN203554278U (en) | A household electrical appliance and an EMI filter circuit thereof | |
| CN111478578A (en) | New energy automobile motor controller high voltage direct current power supply electromagnetic interference filter | |
| CN201523135U (en) | socket with electromagnetic interference suppression | |
| CN204559381U (en) | There are the filter circuit of electromagnetic interference inhibit feature, Switching Power Supply and household electrical appliance | |
| CN203933388U (en) | A kind of for suppressing electromagnetic interference filter circuit and the air conditioner of resonance peak | |
| CN203775019U (en) | Power filter circuit | |
| CN202737264U (en) | Anti-electromagnetic-interference socket | |
| CN203563028U (en) | Airborne AC motor filter | |
| CN203485707U (en) | Circuit structure of automobile air-conditioner blower | |
| CN204652715U (en) | A kind of LED drive power of Electro Magnetic Compatibility | |
| CN206602763U (en) | A kind of anti-electromagnetic interference circuit module | |
| CN206313657U (en) | EMC filter circuit and electromagnetism stove | |
| CN213959954U (en) | Alternating current power supply EMC filter device | |
| CN202550545U (en) | Three-phase miniwatt electromagnetic-interference power filter | |
| CN104797064A (en) | Emc circuit | |
| CN204271910U (en) | A kind of transducer air conditioning and power harassing and wrecking resonance peak thereof suppress circuit | |
| Bellan | Mode transformation of EMI noise due to unbalanced filter capacitors in three-phase motor drive systems | |
| CN203589934U (en) | Anti-interference circuit device for automobile air conditioner motor | |
| CN204497974U (en) | The power filter component of high-gain low-noise | |
| CN203706007U (en) | Ethernet switch voltage stabilizing circuit | |
| CN209267443U (en) | A kind of electric appliance EMC circuit and household electrical appliance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |