CN102790936B - Hysteresis-free electrodynamic transducer with motional impedance rectifying return circuit - Google Patents
Hysteresis-free electrodynamic transducer with motional impedance rectifying return circuit Download PDFInfo
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- CN102790936B CN102790936B CN201110133503.2A CN201110133503A CN102790936B CN 102790936 B CN102790936 B CN 102790936B CN 201110133503 A CN201110133503 A CN 201110133503A CN 102790936 B CN102790936 B CN 102790936B
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Abstract
The invention relates to a hysteresis-free electrodynamic transducer with a motional impedance rectifying return circuit. The electrodynamic transducer can be used for loudspeakers, earphones, sound sensors and the like, and the electrodynamic transducer comprises a movement coil, a disincentive fixed coil, a magnetic circuit and a vibration membrane. The movement coil is located in the center of the magnetic circuit and drives the vibration membrane to produce sound, the disincentive fixed coil is fixed at the appropriate position of the magnetic circuit position, and the disincentive fixed coil is in antiphase connection with the movement coil, and the electrodynamic transducer further comprises the motional impedance rectifying return circuit which is composed of an inductor, a capacitor and a resistor. The hysteresis-free electrodynamic transducer is characterized in that the motional impedance rectifying return circuit composed of the inductor, the capacitor and the resistor rectifies impedance difference of the motional impedance of the movement coil and the impedance of the disincentive fixed coil, motivation energy acted on the magnetic circuit through the movement coil and the disincentive fixed coil mutually drops to the minimum, distortion of the loudspeakers and the earphones caused by loudspeakers and earphones is reduced to the minimum, and sound distortion of the vibration membrane connected with the movement coil is reduced.
Description
Technical field
The present invention relates to a kind of electrodynamic transducer, specifically refer to a kind of make audio playback effective have motional impedance corrective loop without magnetic hysteresis electrodynamic transducer, this electrodynamic transducer can be used in loud speaker, earphone harmony sensor.
Background technology
Audio-visual apparatus has entered the sphere of life of people, has electricity → sound harmony → electric transducer, as dynamic speaker, earphone and sonic transducer in these audio-visual apparatuss.In these devices, the vibrating diaphragm of sounding needs the moving coil by being placed in magnetic circuit to drive.Because moving coil can produce excitation to magnetic circuit when flowing through drive current, the reciprocating excitation energy of moving coil will produce lasting storage → release → storage → dispose procedure in magnetic circuit, moving coil is reacted on again in delayed a period of time, cause the motion result of moving coil deviate from malen to drive singal, cause hystersis distortion.
As known to the present inventor, in order to eliminate the harmful excitation of moving coil to magnetic circuit, people devise anti-excitation coil, (see Figure 11) this anti-excitation coil is fixed on the appropriate position of magnetic circuit, and feed-in is contrary with moving coil phase place, the drive singal of similar intensity, attempt to eliminate the harmful excitation of moving coil to magnetic circuit completely, but because anti-excitation coil is static, and moving coil is motion, the two is because of operating mode difference, in the 20 conventional working frequency range of thoughtful 20000 weeks, equivalent resistance is different, the electric current flow through is also different, so that magnetic circuit is still inevitably subject to harmful excitation of certain degree, sound is made to produce in a flash larger distortion in some frequency range, affect the reproduction quality of sound.
Summary of the invention
For the defect of above-mentioned prior art, the object of this invention is to provide a kind of have motional impedance corrective loop without magnetic hysteresis electrodynamic transducer, according to moving coil, when the drive singal of the different amplitude of feed-in different frequency, because moving caused, impedance that is that present is different, devise inductance, electric capacity, the motional impedance corrective loop of resistance composition, correct and be fed into the energy that moving coil or flyback encourage fixed coil, making moving coil and flyback encourage fixed coil acting in conjunction reaches to minimum in total excitation energy of magnetic circuit, make loud speaker, the playback distortion of the devices such as earphone is down to minimum.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of electrodynamic transducer with motional impedance corrective loop, comprise moving coil 1, flyback encourages fixed coil 2, magnetic circuit 3 and vibrating diaphragm 4, moving coil 1 is positioned at magnetic circuit 3 center and drives vibrating diaphragm 4 sounding, this electrodynamic transducer also comprises by inductance 5, electric capacity 6, the motional impedance corrective loop that resistance 7 is composed in series, be parallel with inductance 5, electric capacity 6, the moving coil of the motional impedance corrective loop that resistance 7 is composed in series is encouraged fixed coil 2 again and is made antiphase coupled in series with flyback, when electrodynamic transducer is worked, moving coil and flyback are encouraged fixed coil acting in conjunction in total excitation energy of magnetic circuit and are reached to minimum.
Inductance 5 in this moving coil motional impedance corrective loop, electric capacity 6, resistance 7 are encouraged fixed coil 2 with flyback and are made coupled in series, do antiphase parallel connection with moving coil 1 again, make moving coil and flyback encourage fixed coil acting in conjunction in total excitation energy of magnetic circuit and reach to minimum.
Encourage fixed coil 2 with flyback after inductance 5 in this moving coil motional impedance corrective loop, resistance 7 coupled in series and do parallel connection, do antiphase parallel connection at the coupled in series point of inductance 5, resistance 7 through electric capacity 6 and moving coil 1 again, when electrodynamic transducer is worked, moving coil and flyback are encouraged fixed coil acting in conjunction in total excitation energy of magnetic circuit and are reached to minimum.
Encourage fixed coil 2 with flyback after inductance 5 in this moving coil motional impedance corrective loop, resistance 7 coupled in series and do parallel connection, do antiphase parallel connection through electric capacity 6 and moving coil 1 again, when electrodynamic transducer is worked, moving coil and flyback are encouraged fixed coil acting in conjunction in total excitation energy of magnetic circuit and are reached to minimum.
Inductance 5 in all moving coil motional impedance corrective loops, electric capacity 6, resistance 7 parameter designing, the principle of Ying Zunding " the different impedance operators presented according to the actuating force/duty ratio of moving coil, the degree of coupling of encouraging fixed coil from flyback and driving signal frequency height; do the correction of encouraging the impedance contrast of fixed coil impedance operator with flyback; when making the drive singal of electrodynamic transducer feed-in different frequency difference amplitude having motional impedance corrective loop to this, the excitation energy that its magnetic circuit is subject to reaches to minimum ".
Beneficial effect of the present invention is used to be:
Because the motional impedance of the present invention to moving coil 1 has done correction, when electrodynamic transducer is worked, the excitation of moving coil 1 pair of magnetic circuit and flyback are encouraged the flyback of fixed coil to magnetic circuit and are encouraged to level off to and offset, total excitation energy that magnetic circuit is subject to also is down to minimum, effectively improves the transducing distortion that electrodynamic transducer causes because of " magnetic hysteresis " phenomenon.
Because the electrodynamic transducer such as loud speaker, earphone according to manufacture of the present invention changes the original magnetic field intensity of magnetic circuit hardly because of the drive current of drive singal, therefore the back-emf produced is atomic, its impedance operator is close to pure resistance, the interface process of the electrodynamic transducer such as loud speaker, earphone and its drive source is made to become simple, significantly reduce the distortion that drive source is produced by its negative feedback loop because of back-emf that output interface obtains, obviously improve the reproduction quality of whole system.
Accompanying drawing explanation
Fig. 1, be the present invention moving coil 1 two end be designed with motional impedance corrective loop without magnetic hysteresis electrodynamic transducer structural representation;
Fig. 2, be the present invention moving coil 1 two end be designed with motional impedance corrective loop without magnetic hysteresis electrodynamic transducer electrical schematic diagram;
Fig. 3, be the present invention moving coil 1 and flyback encourage in fixed coil 2 loop be all designed with motional impedance corrective loop without magnetic hysteresis electrodynamic transducer structural representation;
Fig. 4, be the present invention moving coil 1 and flyback encourage in fixed coil 2 loop be all designed with motional impedance corrective loop without magnetic hysteresis electrodynamic transducer schematic diagram;
Fig. 5, be the present invention flyback encourage in fixed coil 2 loop be designed with tandem-type connection motional impedance corrective loop without magnetic hysteresis electrodynamic transducer structural representation;
Fig. 6 be the present invention flyback encourage in fixed coil 2 loop be designed with tandem-type connection motional impedance corrective loop without magnetic hysteresis electrodynamic transducer electrical schematic diagram;
Fig. 7, be the present invention flyback encourage in fixed coil 2 loop be designed with T-shaped connection motional impedance corrective loop without magnetic hysteresis electrodynamic transducer structural representation;
Fig. 8 be the present invention flyback encourage in fixed coil 2 loop be designed with T-shaped connection motional impedance corrective loop without magnetic hysteresis electrodynamic transducer electrical schematic diagram;
Fig. 9, be the present invention flyback encourage in fixed coil 2 loop be designed with L shape connection motional impedance corrective loop without magnetic hysteresis electrodynamic transducer structural representation;
Figure 10, be the present invention flyback encourage in fixed coil 2 loop be designed with L shape connection motional impedance corrective loop without magnetic hysteresis electrodynamic transducer electrical schematic diagram;
Figure 11, be the structural representation of existing electrodynamic transducer;
The symbol description of figure: 1, moving coil, 2, flyback encourages fixed coil, 3, magnetic circuit, 4, vibrating diaphragm,
5, inductance, 6, electric capacity, 7, resistance.
Embodiment
The first embodiment of the present invention: it is by moving coil 1, flyback encourages fixed coil 2, magnetic circuit 3, vibrating diaphragm 4 and inductance 5, electric capacity 6, resistance 7 is formed, moving coil 1 is positioned at magnetic circuit 3 center and drives vibrating diaphragm 4 sounding, flyback encourages the appropriate location that fixed coil 2 is fixed on magnetic circuit 3, inductance 5, electric capacity 6, resistance 7 is connected in parallel on moving coil 1 two end after connecting, drive singal is attached to after encouraging that fixed coil 2 is anti-phase again with flyback and connecting, moving coil 1 is different from impedance variation that flyback encourages fixed coil 2 by being arranged on moving coil 1 two end when moving, by inductance 5, electric capacity 6, the corrective loop that resistance 7 forms corrects, the harmful excitation of drive singal to magnetic circuit 3 is made to be down to minimum.
The second embodiment: it is by moving coil 1, flyback encourages fixed coil 2, magnetic circuit 3, vibrating diaphragm 4 and inductance 5, electric capacity 6, resistance 7 is formed, moving coil 1 is positioned at magnetic circuit 3 center and drives vibrating diaphragm 4 sounding, flyback encourages the appropriate location that fixed coil 2 is fixed on magnetic circuit 3, inductance 5, electric capacity 6, resistance 7 is connected in parallel on moving coil 1 two end after connecting, drive singal is attached to after encouraging that fixed coil 2 is anti-phase again with flyback and connecting, flyback is encouraged fixed coil 2 and is also parallel with inductance 5, moving coil 1 is different from flyback and encourages the impedance variation of fixed coil 2 by being arranged on moving coil 1 two end when moving, by inductance 5, electric capacity 6, resistance 7 and be connected in parallel on flyback encourage fixed coil 2 two end inductance 5 form corrective loop correct, the harmful excitation of drive singal to magnetic circuit 3 is made to be down to minimum.
The third embodiment: it is by moving coil 1, flyback encourages fixed coil 2, magnetic circuit 3, vibrating diaphragm 4 and inductance 5, electric capacity 6, resistance 7 is formed, moving coil 1 is positioned at magnetic circuit 3 center and drives vibrating diaphragm 4 sounding, flyback encourages the appropriate location that fixed coil 2 is fixed on magnetic circuit 3, flyback is encouraged fixed coil 2 and is connected access by by inductance 5, electric capacity 6, the corrective loop that resistance 7 forms, be attached to drive singal again with after moving coil 1 parallel connected in reverse phase, moving coil 1 is different from flyback and encourages the impedance variation of fixed coil 2 by inductance 5 when moving, electric capacity 6, the corrective loop that resistance 7 forms corrects, the harmful excitation of drive singal to magnetic circuit 3 is made to be down to minimum.
4th kind of embodiment: it is by moving coil 1, flyback encourages fixed coil 2, magnetic circuit 3, vibrating diaphragm 4 and inductance 5, electric capacity 6, resistance 7 electricity is formed, moving coil 1 is positioned at magnetic circuit 3 center and drives vibrating diaphragm 4 sounding, flyback encourages the appropriate location that fixed coil 2 is fixed on magnetic circuit 3, flyback encourages fixed coil 2 at tandem electric inductance 5, after electric capacity 6 and moving coil 1 parallel connected in reverse phase be attached to drive singal again, be connected in parallel on flyback after the series connection of resistance 7 inductance 5 and encourage fixed coil 2 two end, moving coil 1 is different from flyback and encourages the impedance variation of fixed coil 2 by inductance 5 when moving, electric capacity 6, the corrective loop that resistance 7 forms corrects, the harmful excitation of drive singal to magnetic circuit 3 is made to be down to minimum.
5th kind of embodiment: it is by moving coil 1, flyback encourages fixed coil 2, magnetic circuit 3, vibrating diaphragm 4 and inductance 5, electric capacity 6, resistance 7 is formed, moving coil 1 is positioned at magnetic circuit 3 center and drives vibrating diaphragm 4 sounding, flyback encourages the appropriate location that fixed coil 2 is fixed on magnetic circuit 3, flyback encourage fixed coil 2 after the serial capacitance 6 and moving coil 1 parallel connected in reverse phase be attached to drive singal again, be connected in parallel on flyback again after the series connection of inductance 5 resistance 7 and encourage fixed coil 2 two end, moving coil 1 is different from flyback and encourages the impedance variation of fixed coil 2 by inductance 5 when moving, electric capacity 6, the corrective loop that resistance 7 forms corrects, the harmful excitation of drive singal to magnetic circuit T is made to be down to minimum.
The diaphragm mass that the different and moving coil 1 of the excitation energy of fixed coil 2 and moving coil 1 pair of magnetic circuit drives is encouraged different according to flyback, and to the difference that loudspeaker impedance and QTS value etc. require, corresponding embodiment and suitable motional impedance corrective loop electrical quantity can be selected.
The composition inductance 5 of motional impedance corrective loop, electric capacity 6, resistance 7 can encourage fixed coil 2 with moving coil 1, flyback, magnetic circuit 3, vibrating diaphragm 4 are combined into entirety, also can connect the appropriate location that be placed on other with wire.
The present invention is not limited to above-mentioned each example, want certainly can have various distortion in point range not departing from the present invention, as the wire producing inductance by proper resistor rate, inductance 5, resistance 7 are designed to one, in the loud speaker of high frequency of only resetting, omit electric capacity 6 ... etc..
Claims (5)
1. one kind have motional impedance corrective loop without magnetic hysteresis electrodynamic transducer, comprise moving coil (1), flyback encourages fixed coil (2), magnetic circuit (3), vibrating diaphragm (4), inductance (5), electric capacity (6), resistance (7), this moving coil (1) is positioned at magnetic circuit (3) center and drives vibrating diaphragm (4) sounding, this flyback encourages the appropriate location that fixed coil (2) is fixed on magnetic circuit (3), and connect with moving coil (1) is anti-phase, it is characterized in that: this electrodynamic transducer also comprises and is connected in moving coil (1) two end, by inductance (5), electric capacity (6), the motional impedance corrective loop that resistance (7) is composed in series, the impedance operator that this motional impedance corrective loop makes the motional impedance characteristic of moving coil (1) and flyback encourage fixed coil (2) reaches unanimity.
2. electrodynamic transducer according to claim 1, it is characterized in that: this electrodynamic transducer also comprises the motional impedance corrective loop being connected in flyback and encouraging the inductance (5) in fixed coil (2) loop and be connected in moving coil (1) loop, and the impedance operator that this motional impedance corrective loop makes the motional impedance characteristic of moving coil (1) and flyback encourage fixed coil (2) reaches unanimity.
3. one kind have motional impedance corrective loop without magnetic hysteresis electrodynamic transducer, comprise moving coil (1), flyback encourages fixed coil (2), magnetic circuit (3), vibrating diaphragm (4), inductance (5), electric capacity (6), resistance (7), this moving coil (1) is positioned at magnetic circuit (3) center and drives vibrating diaphragm (4) sounding, this flyback encourages the appropriate location that fixed coil (2) is fixed on magnetic circuit (3), and with moving coil (1) parallel connected in reverse phase, it is characterized in that: this electrodynamic transducer also comprises and is connected in flyback and encourages in fixed coil (2) loop by inductance (5), electric capacity (6), the motional impedance corrective loop that resistance (7) is composed in series, the impedance operator that this motional impedance corrective loop makes the motional impedance characteristic of moving coil (1) and flyback encourage fixed coil (2) reaches unanimity.
4. electrodynamic transducer according to claim 3, it is characterized in that: this electrodynamic transducer also comprises and is connected in flyback and encourages the motional impedance corrective loop being made up of T-shaped circuit in fixed coil (2) loop inductance (5), electric capacity (6), resistance (7), and the impedance operator that this motional impedance corrective loop makes the motional impedance characteristic of moving coil (1) and flyback encourage fixed coil (2) reaches unanimity.
5. electrodynamic transducer according to claim 3, it is characterized in that: this electrodynamic transducer also comprises and is connected in flyback and encourages the motional impedance corrective loop being made up of L shape circuit in fixed coil (2) loop inductance (5), electric capacity (6), resistance (7), and the impedance operator that this motional impedance corrective loop makes the motional impedance characteristic of moving coil (1) and flyback encourage fixed coil (2) reaches unanimity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110133503.2A CN102790936B (en) | 2011-05-18 | 2011-05-18 | Hysteresis-free electrodynamic transducer with motional impedance rectifying return circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110133503.2A CN102790936B (en) | 2011-05-18 | 2011-05-18 | Hysteresis-free electrodynamic transducer with motional impedance rectifying return circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102790936A CN102790936A (en) | 2012-11-21 |
| CN102790936B true CN102790936B (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110133503.2A Active CN102790936B (en) | 2011-05-18 | 2011-05-18 | Hysteresis-free electrodynamic transducer with motional impedance rectifying return circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105554656B (en) * | 2016-02-29 | 2019-05-07 | 歌尔股份有限公司 | Coil-moving speaker structure and audio playing apparatus |
| CN112593919B (en) * | 2020-12-01 | 2022-12-09 | 中海油田服务股份有限公司 | Resistivity correction method, resistivity correction device and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3443041A (en) * | 1965-06-28 | 1969-05-06 | Bell Telephone Labor Inc | Surface-barrier diode transducer using high dielectric semiconductor material |
| US4464785A (en) * | 1983-04-08 | 1984-08-07 | Charles N. K. Cluxton | Loudspeaker system |
| CN1450833A (en) * | 2003-04-14 | 2003-10-22 | 黄革雄 | Double-voice coil counter-connection coupling moving-coil loudspeaker |
| CN101305291A (en) * | 2005-10-07 | 2008-11-12 | 比兰科公司 | Current and magnetic field sensors, control method and magnetic core for said sensors |
| CN202111849U (en) * | 2011-05-18 | 2012-01-11 | 吴琪君 | Hysteresis-free electrodynamic transducer with dynamic impedance corrective loop |
-
2011
- 2011-05-18 CN CN201110133503.2A patent/CN102790936B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3443041A (en) * | 1965-06-28 | 1969-05-06 | Bell Telephone Labor Inc | Surface-barrier diode transducer using high dielectric semiconductor material |
| US4464785A (en) * | 1983-04-08 | 1984-08-07 | Charles N. K. Cluxton | Loudspeaker system |
| CN1450833A (en) * | 2003-04-14 | 2003-10-22 | 黄革雄 | Double-voice coil counter-connection coupling moving-coil loudspeaker |
| CN101305291A (en) * | 2005-10-07 | 2008-11-12 | 比兰科公司 | Current and magnetic field sensors, control method and magnetic core for said sensors |
| CN202111849U (en) * | 2011-05-18 | 2012-01-11 | 吴琪君 | Hysteresis-free electrodynamic transducer with dynamic impedance corrective loop |
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| CN102790936A (en) | 2012-11-21 |
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Application publication date: 20121121 Assignee: YUYAO TEMPERATURE INSTRUMENT FACTORY CO., LTD. Assignor: Wu Qijun Contract record no.: 2015330000143 Denomination of invention: Hysteresis-free electrodynamic transducer with motional impedance rectifying return circuit Granted publication date: 20150114 License type: Exclusive License Record date: 20150604 |
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