CN101546975A - No-spark electronic fuel pump for resisting electromagnetic interference and adopted circuit thereof - Google Patents
No-spark electronic fuel pump for resisting electromagnetic interference and adopted circuit thereof Download PDFInfo
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- CN101546975A CN101546975A CN200910137647A CN200910137647A CN101546975A CN 101546975 A CN101546975 A CN 101546975A CN 200910137647 A CN200910137647 A CN 200910137647A CN 200910137647 A CN200910137647 A CN 200910137647A CN 101546975 A CN101546975 A CN 101546975A
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- electric capacity
- permanent magnet
- direct current
- current motor
- magnet direct
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- 239000000446 fuel Substances 0.000 title claims abstract description 19
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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Abstract
The present invention discloses an electromagnetic interference and spark resisting circuit which is used for electronic fuel pump. The circuit is composed of three capacitors, wherein a first capacitor is connected with a permanent magnetic DC motor which is taken as a pump core motor in parallel. The fist capacitor is used for restricting the differential mode noise generated by the permanent magnetic DC motor in power source. A second capacitor is connected with a third capacitor in series and is connected with the permanent magnetic DC motor in parallel. The connection end of the second capacitor and the third capacitor is connected with the casing of permanent magnetic DC motor for restricting the common mode noise. The invention also discloses an electronic fuel pump comprising the circuit. The electronic fuel pump has the advantages of no spark, reliable safety and simple structure. The electronic fuel pump must have positive using effect to the automobile industry.
Description
Technical field
The present invention relates to automobile engine fuel oil system, particularly relate to a kind of no-spark electronic fuel pump of anti-electromagnetic interference.
Background technology
Usually, electronic fuel pump pump core motor is by automobile storage battery or generator dc powered.The pump core coil passes through because of electric current is arranged, magnetic field force induced driving in magnetic field and rotating, pump core motor rotation process causes brush to slide on commutator segment, when brush contacts with two adjacent commutator segments simultaneously, produce very big short circuit current on the motor winding that is attached thereto, when brush breaks away from previous commutator segment a commutator segment slides backward, the instantaneous open circuit of motor windings, produce very big back electromotive force, therefore trigger the sparkover before of brush and previous commutator segment.Also produce high-frequency harmonic in the circuit simultaneously, produce strong electromagnetic.
Summary of the invention
Trigger between brush and the commutator segment reciprocal strong electromagnetic in the sparkover and circuit in order to solve, make that fuel pump work is reliable more, safety, reduce the interference of fuel pump simultaneously to other electronic components, the invention discloses the anti-electromagnetic interference and the spark circuit that are used for electronic fuel pump, this circuit is made up of three electric capacity, wherein first electric capacity is used for suppressing the differential mode noise that permanent magnet direct current motor produces at power supply with in parallel as the permanent magnet direct current motor of pump core motor; Second electric capacity and the 3rd electric capacity polyphone, in parallel with permanent magnet direct current motor again, second electric capacity and the 3rd electric capacity be connected termination permanent magnet direct current motor shell, be used to suppress common mode noise.
Wherein first electric capacity, second electric capacity and the 3rd electric capacity all adopt ceramic condenser.Electric capacity adopts short pin and is close to permanent magnet direct current motor and installs.
The invention also discloses a kind of no-spark electronic fuel pump of anti-electromagnetic interference, comprise the pump housing, permanent magnet direct current motor and end-cap assembly, its middle pump body comprises bottom end cover, oil-in and impeller; Permanent magnet direct current motor comprises coil, main shaft, magnetic cylinder and commutator segment; End-cap assembly comprises brush, above-mentioned anti-electromagnetic interference and spark circuit, oil transportation joint, electrical equipment jointing and check-valves.
The contact no-spark was safe and reliable, simple in structure when fuel pump disclosed by the invention was worked, and will bring positive result of use to automobile industry.
Description of drawings
Fig. 1: the no-spark electronic fuel pump schematic diagram of anti-electromagnetic interference;
Fig. 2: the control principle figure of anti-electromagnetic interference and spark circuit.
Embodiment
Below in conjunction with accompanying drawing the present invention is specifically described.
Fig. 1 shows fuel pump core of the present invention, comprises the pump housing 1, as the permanent magnet direct current motor 2 and the end-cap assembly 3 of pump core motor M.The pump housing 1 comprises bottom end cover 11, oil-in 12, impeller 13 etc.Permanent magnet direct current motor 2 comprises coil 21, main shaft 22, magnetic cylinder 23, commutator segment 24.End-cap assembly 3 comprises brush 31, anti-electromagnetic interference and spark circuit 32, oil transportation joint 33, electrical equipment jointing 34, check-valves 35 etc.
Fig. 2 shows anti-electromagnetic interference and spark circuit.Wherein capacitor C 1 is used for suppressing the differential mode noise that permanent magnet direct current motor produces in power supply.Capacitor C 2, C3 are used for suppressing common mode noise.C1, C2, C3 all adopt ceramic condenser, require the pin weak point of electric capacity and are close to the permanent magnet direct current motor installation, and the common port of C2, C3 must can be abutted against motor casing, makes impedance less.
In the course of the work, the moment of commutator segment 24 and brush 31 reciprocal the break-make sparkover and the high frequency noise that produce go out by power line and spatial emission owing to added electric capacity in circuit, then circuit constitutes rlc circuit.Instantaneous high-frequency energy in the circuit can discharge by rlc circuit, also can will be harmful to by the energy oscillation of rlc circuit energy be reduced to minimum, thereby suppressed the sparkover and the electromagnetic interference of contact in the circuit.
Claims (6)
1, a kind of anti-electromagnetic interference and spark circuit that is used for electronic fuel pump, it is characterized in that, this circuit is made up of three electric capacity, wherein first electric capacity (C1) is in parallel with the permanent magnet direct current motor (2) as pump core motor, is used for suppressing the differential mode noise that permanent magnet direct current motor (2) produces at power supply; Second electric capacity (C2) and the 3rd electric capacity (C3) polyphone, in parallel with permanent magnet direct current motor (2) again, second electric capacity (C2) and the 3rd electric capacity (C3) be connected termination permanent magnet direct current motor (2) shell, be used to suppress common mode noise.
2, anti-electromagnetic interference according to claim 1 and spark circuit is characterized in that, first electric capacity (C1), second electric capacity (C2) and the 3rd electric capacity (C3) all adopt ceramic condenser.
3, anti-electromagnetic interference according to claim 1 and 2 and spark circuit is characterized in that, electric capacity adopts short pin and is close to permanent magnet direct current motor (2) and installs.
4, a kind of no-spark electronic fuel pump of anti-electromagnetic interference comprises the pump housing (1), permanent magnet direct current motor (2) and end-cap assembly (3), and its middle pump body (1) comprises bottom end cover (11), oil-in (12) and impeller (13); Permanent magnet direct current motor (2) comprises coil (21), main shaft (22), magnetic cylinder (23) and commutator segment (24); End-cap assembly (3) comprises brush (31), anti-electromagnetic interference and spark circuit (32), oil transportation joint (33), electrical equipment jointing (34) and check-valves (35), it is characterized in that: anti-electromagnetic interference and spark circuit (32) are made up of three electric capacity, wherein first electric capacity (C1) is in parallel with the permanent magnet direct current motor (2) as pump core motor, is used for suppressing the differential mode noise that permanent magnet direct current motor (2) produces at power supply; Second electric capacity (C2) and the 3rd electric capacity (C3) polyphone, in parallel with permanent magnet direct current motor (2) again, second electric capacity (C2) and the 3rd electric capacity (C3) be connected termination permanent magnet direct current motor (2) shell, be used to suppress common mode noise.
5, the no-spark electronic fuel pump of anti-electromagnetic interference according to claim 4 is characterized in that, first electric capacity (C1), second electric capacity (C2) and the 3rd electric capacity (C3) all adopt ceramic condenser.
According to the no-spark electronic fuel pump of claim 4 or 5 described anti-electromagnetic interference, it is characterized in that 6, electric capacity adopts short pin and is close to permanent magnet direct current motor (2) and installs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910137647A CN101546975A (en) | 2009-05-04 | 2009-05-04 | No-spark electronic fuel pump for resisting electromagnetic interference and adopted circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910137647A CN101546975A (en) | 2009-05-04 | 2009-05-04 | No-spark electronic fuel pump for resisting electromagnetic interference and adopted circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101546975A true CN101546975A (en) | 2009-09-30 |
Family
ID=41193916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910137647A Pending CN101546975A (en) | 2009-05-04 | 2009-05-04 | No-spark electronic fuel pump for resisting electromagnetic interference and adopted circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101546975A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106899146A (en) * | 2017-03-30 | 2017-06-27 | 深圳市利宏微形电机有限公司 | A kind of permanent magnet DC motor of the electric capacity △ type connection structures for meeting EMC requirements |
| CN109450177A (en) * | 2018-12-18 | 2019-03-08 | 常州亚美柯宝马电机有限公司 | A kind of anti-interference motor of anti-jamming circuit and automobile clean system |
-
2009
- 2009-05-04 CN CN200910137647A patent/CN101546975A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106899146A (en) * | 2017-03-30 | 2017-06-27 | 深圳市利宏微形电机有限公司 | A kind of permanent magnet DC motor of the electric capacity △ type connection structures for meeting EMC requirements |
| CN109450177A (en) * | 2018-12-18 | 2019-03-08 | 常州亚美柯宝马电机有限公司 | A kind of anti-interference motor of anti-jamming circuit and automobile clean system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090930 |