CN205622426U - Direct current has filtering protection circuit of brush motor - Google Patents
Direct current has filtering protection circuit of brush motor Download PDFInfo
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- CN205622426U CN205622426U CN201620097402.2U CN201620097402U CN205622426U CN 205622426 U CN205622426 U CN 205622426U CN 201620097402 U CN201620097402 U CN 201620097402U CN 205622426 U CN205622426 U CN 205622426U
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Abstract
The utility model relates to a field of making an uproar, concretely relates to direct current has filtering protection circuit of brush motor fall in filtering. Include: power, this power setting have the positive negative pole both ends of brush motor at the direct current, filter circuit, this filter circuit include poor common mode filter circuit and differential mode filter circuit, and this poor common mode filter circuit connects in parallel has the positive negative pole both ends of brush motor at the direct current, and this differential mode filter circuit establishes ties to be had between the brush motor at power and direct current, the protection circuit, should protect the circuit connect in parallel the direct current have the brush motor positive negative pole both ends. The utility model discloses a design a direct current has filtering protection circuit of brush motor, adopt poor common mode filter circuit and differential mode filter circuit, have the electromagnetic interference of brush motor to provide good suppression ability to the direct current, simultaneously, adopt the protection circuit, the reverse electromotive force who has the brush motor to produce at work to the direct current restraines, avoids the influence of high voltage to back level circuit, and circuit structure is simple in the filtering protection, and occupation space is little.
Description
Technical field
This utility model relates to filtering noise reduction field, is specifically related to the filtering protection circuit of a kind of direct-current brush motor.
Background technology
Along with popularizing year by year of electronization product, motor becomes the important component part of each electronic product.Along with electronic product requires more and more higher, motor there has also been high power, high-revolving requirement, the requirement of motor Electromagnetic Launching is especially prominent, and becomes the important performance indexes of detection Motor product.
Particularly in direct-current brush motor, the electromagnetic radiation of direct-current brush motor not only has influence on the electromagnetic environment of human lives, and the normal work to other circuit in electronic product system simultaneously causes severe jamming, affects system properly functioning.The filtering protection circuit having direct-current brush motor at present generally has a disadvantage in that
1, filter capacity is strong, and the rejection ability of the different types of interference produced d.c. motor in height frequency range is the strongest.
2, taken up space bigger.
3, manufacturing process difficulty is bigger.
On the basis of existing direct-current brush motor system, how to design one preferably filter protection circuit, be the primary study direction of those skilled in the art.
Utility model content
The technical problems to be solved in the utility model is, for the drawbacks described above of prior art, it is provided that the filtering protection circuit of a kind of direct-current brush motor, improves filter capacity, takes up room little, simple in construction.
This utility model solves its technical problem and be the technical scheme is that the filtering protection circuit providing a kind of direct-current brush motor, including:
Power supply, this power supply is arranged on the positive and negative end of direct-current brush motor；
Filter circuit, this filter circuit includes difference common mode filtering circuit and differential mode filter circuit, and this difference common mode filtering circuit is connected in parallel on the positive and negative end of direct-current brush motor, and this differential mode filter circuit is connected between power supply and direct-current brush motor；
Protection circuit, this protection circuit is connected in parallel on the positive and negative end of direct-current brush motor.
Wherein, preferred version is: this differential mode filter circuit is connected with direct-current brush motor and formed a branch road, and this branch road is in parallel with difference common mode filtering circuit.
Wherein, preferred version is: this difference common mode filtering circuit includes electric capacity C1 and the electric capacity C2 being serially connected, and with connect after electric capacity C1 and electric capacity C2 electric capacity C3, this electric capacity C1 and electric capacity C2 in parallel indirectly, this electric capacity C3 is used for suppressing differential mode interference.
Wherein, preferred version is: this difference common mode filtering circuit includes an X2Y capacitance component.
Wherein, preferred version is: this difference common mode filtering circuit includes positive electrical pole plate and negative el, the both sides of this positive electrical pole plate and negative el are provided with bucking electrode plate, this is arranged on the bucking electrode plate earthing between positive electrical pole plate and negative el, this positive electrical pole plate, negative el and be arranged on bucking electrode plate between the two and constitute a Faraday shield cage, strengthen the common mode filtering performance of difference common mode filtering circuit.
Wherein, preferred version is: this differential mode filter circuit includes the inductance being arranged between power supply and direct-current brush motor.
Wherein, preferred version is: this inductance includes the first inductance L1 and the second inductance L2 being separately positioned on direct-current brush motor positive and negative end, strengthens the differential mode filtering performance of differential mode filter circuit.
Wherein, preferred version is: this inductance is chip inductor.
Wherein, preferred version is: the two ends of this protection circuit are arranged between differential mode filter circuit and direct-current brush motor.
Wherein, preferred version is: this protection circuit includes a two-way TVS pipe.
The beneficial effects of the utility model are, compared with prior art, this utility model, by designing the filtering protection circuit of a kind of direct-current brush motor, uses difference common mode filtering circuit and differential mode filter circuit, the rejection ability good to the electromagnetic interference offer of direct-current brush motor；Meanwhile, using protection circuit, the inverse electromotive force produced at work for direct-current brush motor suppresses, it is to avoid the high voltage impact on late-class circuit；And filtering protection circuit structure is simple, takes up room little.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the circuit diagram of this utility model filtering protection circuit；
Fig. 2 is the circuit equivalent figure of this utility model difference common mode filtering circuit；
Fig. 3 is the structural representation of this utility model difference common mode filtering circuit.
Detailed description of the invention
In conjunction with accompanying drawing, preferred embodiment of the present utility model is elaborated.
The filtering protection circuit of a kind of direct-current brush motor, including power supply, filter circuit and protection circuit, power supply is arranged on the positive and negative end of direct-current brush motor；Filter circuit includes difference common mode filtering circuit and differential mode filter circuit, and this difference common mode filtering circuit is connected in parallel on the positive and negative end of direct-current brush motor, and this differential mode filter circuit is connected between power supply and direct-current brush motor；Protection circuit is connected in parallel on the positive and negative end of direct-current brush motor.
As it is shown in figure 1, this utility model provides the preferred embodiment of the filtering protection circuit of a kind of direct-current brush motor.
The filtering protection circuit of a kind of direct-current brush motor, including power supply, difference common mode filtering circuit, differential mode filter circuit and protection circuit.Preferably, differential mode filter circuit is connected with direct-current brush motor and is formed a branch road, and this branch road is in parallel with difference common mode filtering circuit.
In the supply, power supply includes positive source and power cathode, and the positive source of power supply and power cathode are separately positioned on the positive and negative end of direct-current brush motor, it is provided that the voltage of direct-current brush motor work.
In difference common mode filtering circuit, difference common mode filtering circuit includes a capacitance component, can suppress the poor common mode disturbances that direct-current brush motor produces.
In differential mode filter circuit, differential mode filter circuit includes the inductance being arranged between power supply and direct-current brush motor, as supplementing of difference common mode filtering circuit；Preferably, inductance includes the first inductance L1 and the second inductance L2 being separately positioned on direct-current brush motor positive and negative end, strengthens the differential mode filtering performance of differential mode filter circuit.
Further, inductance is chip inductor.Chip inductor this as wattless component, the most not consumed energy；Chip inductor utilizes from the characteristic being presented as high impedance under high-frequency signal, stops high-frequency signal circulation in the line, high-frequency signal is reflected back interference source, thus plays the inhibitory action to differential mode electromagnetic interference.
In protection circuit, the two ends of protection circuit are arranged between differential mode filter circuit and direct-current brush motor；Protection circuit uses two-way TVS pipe to realize; TVS pipe is associated in motor circuit, the device avalanche breakdown when the voltage in circuit reaches the breakdown voltage of TVS, and TVS punctures work big Control of Voltage in certain safety value; by ground wire bleed off, thus protect late-class circuit.
As shown in Figures 2 and 3, the preferred embodiment of the equivalent circuit diagram of this utility model offer difference common mode filtering circuit.
Difference common mode filtering circuit includes the electric capacity C1 and the electric capacity C2 that are serially connected, and with connect after electric capacity C1 and electric capacity C2 parallel connection electric capacity C3, this electric capacity C1 and electric capacity C2 indirectly, this electric capacity C3 is used for suppressing differential mode interference.
Preferably, this difference common mode filtering circuit includes an X2Y capacitance component.
Further, this difference common mode filtering circuit includes positive electrical pole plate and negative el, the both sides of this positive electrical pole plate 21 and negative el 22 are provided with bucking electrode plate, this is arranged on the bucking electrode plate earthing between positive electrical pole plate 21 and negative el 22, and bucking electrode plate includes the first bucking electrode plate 11, secondary shielding battery lead plate 12 and the 3rd bucking electrode plate 13.
Further, difference common mode filtering circuit includes that several form such as the poor common mode filtering structure of Fig. 3, according to the different accommodating quantity arranging correspondence.
Wherein, first power electrode plate 21 is arranged between the first bucking electrode plate 11 and secondary shielding battery lead plate 12, second source battery lead plate 22 is arranged between secondary shielding battery lead plate 12 and the 3rd bucking electrode plate 13, electric capacity C1 is formed between first power electrode plate the 21, first bucking electrode plate 11 and secondary shielding battery lead plate 12, second source battery lead plate 22, between secondary shielding battery lead plate 12 and the 3rd bucking electrode plate 13 formed electric capacity C2, being filtered common-mode noise, common-mode noise selects that impedance is minimum is filtered；This positive electrical pole plate, negative el and be arranged on bucking electrode plate between the two and constitute a Faraday shield cage, strengthen the common mode filtering performance of difference common mode filtering circuit.Meanwhile, form electric capacity C3 between the first power electrode plate 21 and second source battery lead plate 22, differential mode noise is filtered；
In this utility model, filter circuit and protection circuit are arranged on a circuit board, and integral type is arranged in direct-current brush motor, improve, taking up room of filter circuit and protection circuit, it is simple to install, cost-effective.
As described above, only this utility model most preferred embodiment, it is not intended to limit scope of the present utility model, all equivalence changes made according to this utility model claim or modification, is all this utility model and is contained.
Claims (10)
1. the filtering protection circuit of a direct-current brush motor, it is characterised in that including:
Power supply, this power supply is arranged on the positive and negative end of direct-current brush motor；
Filter circuit, this filter circuit includes difference common mode filtering circuit and differential mode filter circuit, and this difference common mode filtering circuit is connected in parallel on the positive and negative end of direct-current brush motor, and this differential mode filter circuit is connected between power supply and direct-current brush motor；
Protection circuit, this protection circuit is connected in parallel on the positive and negative end of direct-current brush motor.
Filtering protection circuit the most according to claim 1, it is characterised in that: this differential mode filter circuit is connected with direct-current brush motor and is formed a branch road, and this branch road is in parallel with difference common mode filtering circuit.
Filtering protection circuit the most according to claim 1 and 2, it is characterized in that: this difference common mode filtering circuit includes electric capacity C1 and the electric capacity C2 being serially connected, and with connect after electric capacity C1 and the in parallel electric capacity C3 of electric capacity C2, this electric capacity C1 and electric capacity C2 indirectly, this electric capacity C3 is used for suppressing differential mode interference.
Filtering protection circuit the most according to claim 3, it is characterised in that: this difference common mode filtering circuit includes an X2Y capacitance component.
Filtering protection circuit the most according to claim 3, it is characterized in that: this difference common mode filtering circuit includes positive electrical pole plate and negative el, the both sides of this positive electrical pole plate and negative el are provided with bucking electrode plate, this is arranged on the bucking electrode plate earthing between positive electrical pole plate and negative el, this positive electrical pole plate, negative el and be arranged on bucking electrode plate between the two and constitute a Faraday shield cage, strengthen the common mode filtering performance of difference common mode filtering circuit.
Filtering protection circuit the most according to claim 2, it is characterised in that: this differential mode filter circuit includes the inductance being arranged between power supply and direct-current brush motor.
Filtering protection circuit the most according to claim 6, it is characterised in that: this inductance includes the first inductance L1 and the second inductance L2 being separately positioned on direct-current brush motor positive and negative end, strengthens the differential mode filtering performance of differential mode filter circuit.
8. according to the filtering protection circuit described in claim 6 or 7, it is characterised in that: this inductance is chip inductor.
Filtering protection circuit the most according to claim 1, it is characterised in that: the two ends of this protection circuit are arranged between differential mode filter circuit and direct-current brush motor.
10. according to the filtering protection circuit described in claim 1 or 9, it is characterised in that: this protection circuit includes a two-way TVS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620097402.2U CN205622426U (en) | 2016-01-29 | 2016-01-29 | Direct current has filtering protection circuit of brush motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620097402.2U CN205622426U (en) | 2016-01-29 | 2016-01-29 | Direct current has filtering protection circuit of brush motor |
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| Publication Number | Publication Date |
|---|---|
| CN205622426U true CN205622426U (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620097402.2U Active CN205622426U (en) | 2016-01-29 | 2016-01-29 | Direct current has filtering protection circuit of brush motor |
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| CN (1) | CN205622426U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110007231A (en) * | 2019-05-06 | 2019-07-12 | 西安交通大学 | Series direct current arc method for measuring in brush direct current motor electric loop |
| CN110456291A (en) * | 2019-08-28 | 2019-11-15 | 创领心律管理医疗器械（上海）有限公司 | Filter circuit and electronic device |
| CN112689453A (en) * | 2020-12-11 | 2021-04-20 | 深圳市韬略科技有限公司 | Novel double-line balance EMI filter |
-
2016
- 2016-01-29 CN CN201620097402.2U patent/CN205622426U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110007231A (en) * | 2019-05-06 | 2019-07-12 | 西安交通大学 | Series direct current arc method for measuring in brush direct current motor electric loop |
| CN110456291A (en) * | 2019-08-28 | 2019-11-15 | 创领心律管理医疗器械（上海）有限公司 | Filter circuit and electronic device |
| WO2021037169A1 (en) * | 2019-08-28 | 2021-03-04 | 创领心律管理医疗器械（上海）有限公司 | Filter circuit and electronic apparatus |
| CN110456291B (en) * | 2019-08-28 | 2021-12-24 | 创领心律管理医疗器械（上海）有限公司 | Filter circuit and electronic device |
| CN112689453A (en) * | 2020-12-11 | 2021-04-20 | 深圳市韬略科技有限公司 | Novel double-line balance EMI filter |
| CN112689453B (en) * | 2020-12-11 | 2022-06-24 | 深圳市韬略科技有限公司 | Novel double-line balance EMI filter |
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