CN102790936A - 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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- CN102790936A CN102790936A CN2011101335032A CN201110133503A CN102790936A CN 102790936 A CN102790936 A CN 102790936A CN 2011101335032 A CN2011101335032 A CN 2011101335032A CN 201110133503 A CN201110133503 A CN 201110133503A CN 102790936 A CN102790936 A CN 102790936A
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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 be meant a kind of effective no magnetic hysteresis electrodynamic transducer with motional impedance corrective loop of audio playback that makes, this electrodynamic transducer can be used in loud speaker, earphone and sonic transducer etc.
Background technology
Audio-visual apparatus has got into people's sphere of life, electricity → sound harmony → electric transducer is arranged, like dynamic speaker, earphone and sonic transducer in these audio-visual apparatuss.In these devices, the vibrating diaphragm of sounding need be by the motion coil drive that places magnetic circuit.Because the motion coil can produce excitation to magnetic circuit when flowing through drive current; The reciprocating excitation energy of motion coil will produce the storage → release → storage → dispose procedure that continues in magnetic circuit; A period of time reacts on the motion coil again lagging behind; Cause the motion result of motion coil to deviate from the drive signal that malen is given, cause hystersis distortion.
Know that according to inventor of the present invention in order to eliminate the harmful excitation of motion coil to magnetic circuit, people have designed anti-excitation coil; (referring to Figure 11) this anti-excitation coil is fixed on the appropriate position of magnetic circuit, and feed-in is opposite with the motion coil phase, the drive signal that intensity is close; Attempt to eliminate fully of the harmful excitation of motion coil to magnetic circuit, but because anti-excitation coil is static, and the motion coil moves; The two is different because of operating mode, and in the working frequency range commonly used in 20 thoughtful 20000 weeks, equivalent resistance is different; The electric current that flows through is also different; So that magnetic circuit still receives harmful excitation of certain degree inevitably, makes sound produce big distortion in a flash in some frequency range, influences the reproduction quality of sound.
Summary of the invention
Defective to above-mentioned prior art; The purpose of this invention is to provide a kind of no magnetic hysteresis electrodynamic transducer with motional impedance corrective loop; Different because of the impedance that appears due to the motion when the drive signal of the different amplitudes of feed-in different frequency according to the motion coil; Designed the motional impedance corrective loop of forming by inductance, electric capacity, resistance; Correction is fed into motion coil or the anti-energy that encourages fixed coil, makes motion coil and the acting in conjunction of anti-excitation fixed coil reach to minimum in total excitation energy of magnetic circuit, makes the playback distortion of devices such as loud speaker, earphone reduce to minimum.
For realizing the foregoing invention purpose, the technical scheme that the present invention adopts is following:
A kind of electrodynamic transducer with motional impedance corrective loop; Comprise motion coil 1, anti-fixed coil 2, magnetic circuit 3 and the vibrating diaphragm 4 of encouraging; Motion coil 1 is positioned at magnetic circuit 3 centers and drives vibrating diaphragm 4 sounding; This electrodynamic transducer also comprises the motional impedance corrective loop that is composed in series by inductance 5, electric capacity 6, resistance 7; The motion coil that is parallel with the motional impedance corrective loop that inductance 5, electric capacity 6, resistance 7 be composed in series is made the antiphase coupled in series with anti-excitation fixed coil 2 again, makes electrodynamic transducer work luck moving winding and the acting in conjunction of anti-excitation fixed coil reach to minimum in total excitation energy of magnetic circuit.
Do parallel connection with anti-excitation fixed coil 2 after inductance 5 in this motion coil motional impedance corrective loop, resistance 7 coupled in series; Do the antiphase parallel connection at the coupled in series point of inductance 5, resistance 7 through electric capacity 6 and motion coil 1 again, make electrodynamic transducer work luck moving winding and the acting in conjunction of anti-excitation fixed coil reach to minimum in total excitation energy of magnetic circuit.
Do parallel connection with anti-excitation fixed coil 2 after inductance 5 in this motion coil motional impedance corrective loop, resistance 7 coupled in series; Do the antiphase parallel connection through electric capacity 6 and motion coil 1 again, make electrodynamic transducer work luck moving winding and the acting in conjunction of anti-excitation fixed coil reach to minimum in total excitation energy of magnetic circuit.
Use beneficial effect of the present invention to be:
Because the present invention has done correction to the motional impedance of motion coil 1; Make excitation and the anti-excitation fixed coil of 1 pair of magnetic circuit of electrodynamic transducer work luck moving winding level off to counteracting to the anti-excitation of magnetic circuit; Total excitation energy that magnetic circuit receives is also reduced to minimum, has effectively improved the transducing distortion that electrodynamic transducer causes because of " magnetic hysteresis " phenomenon.
Owing to change the original magnetic field intensity of magnetic circuit because of the drive current of drive signal hardly according to electrodynamic transducers such as the loud speaker of manufacturing of the present invention, earphones; So the back-emf that produces is atomic; Its impedance operator approaches pure resistance; Make the interface of electrodynamic transducer such as loud speaker, earphone and its drive source handle and become simple, significantly reduce the distortion that back-emf that drive source obtains because of output interface produces through its negative feedback loop, obviously improve the reproduction quality of whole system.
Description of drawings
Fig. 1, be the present invention is designed with the motional impedance corrective loop at motion coil 1 two ends no magnetic hysteresis electrodynamic transducer structural representation;
Fig. 2, be the present invention is designed with the motional impedance corrective loop at motion coil 1 two ends no magnetic hysteresis electrodynamic transducer electrical schematic diagram;
The no magnetic hysteresis electrodynamic transducer structural representation of Fig. 3, to be the present invention all be designed with in motion coil 1 and anti-excitation fixed coil 2 loops motional impedance corrective loop;
The no magnetic hysteresis electrodynamic transducer schematic diagram of Fig. 4, to be the present invention all be designed with in motion coil 1 and anti-excitation fixed coil 2 loops motional impedance corrective loop;
The no magnetic hysteresis electrodynamic transducer structural representation of Fig. 5, to be the present invention be designed with in anti-excitation fixed coil 2 loops tandem-type connection motional impedance corrective loop;
Fig. 6 is the present invention is designed with tandem-type connection motional impedance corrective loop in anti-excitation fixed coil 2 loops a no magnetic hysteresis electrodynamic transducer electrical schematic diagram;
Fig. 7, to be the present invention be designed with the no magnetic hysteresis electrodynamic transducer structural representation that T shape connects method motional impedance corrective loop in anti-excitation fixed coil 2 loops;
Fig. 8 is that the present invention is designed with the no magnetic hysteresis electrodynamic transducer electrical schematic diagram that T shape connects method motional impedance corrective loop in anti-excitation fixed coil 2 loops;
Fig. 9, to be the present invention be designed with the L shaped no magnetic hysteresis electrodynamic transducer structural representation that connects method motional impedance corrective loop in anti-excitation fixed coil 2 loops;
Figure 10, to be the present invention be designed with the L shaped no magnetic hysteresis electrodynamic transducer electrical schematic diagram that connects method motional impedance corrective loop in anti-excitation fixed coil 2 loops;
Figure 11, be the structural representation of prior electric transducer;
The symbol description of figure: 1, motion coil, 2, the anti-fixed coil that encourages, 3, magnetic circuit, 4, vibrating diaphragm,
5, inductance, 6, electric capacity, 7, resistance.
Embodiment
First kind of embodiment of the present invention: it is to be made up of motion coil 1, anti-fixed coil 2, magnetic circuit 3, vibrating diaphragm 4 and inductance 5, electric capacity 6, the resistance 7 of encouraging; Motion coil 1 is positioned at magnetic circuit 3 centers and drives vibrating diaphragm 4 sounding; Anti-excitation fixed coil 2 is fixed on the appropriate location of magnetic circuit 3; Be connected in parallel on motion coil 1 two ends after inductance 5, electric capacity 6, resistance 7 series connection; Be attached to drive signal again with after anti-excitation fixed coil 2 anti-phases are connected; The impedance variations that is different from anti-excitation fixed coil 2 during motion coil 1 motion is proofreaied and correct by being arranged on corrective loop motion coil 1 two ends, that be made up of inductance 5, electric capacity 6, resistance 7, makes drive signal reduce to minimum to harmful excitation of magnetic circuit 3.
Second kind of embodiment: it is to be made up of motion coil 1, anti-fixed coil 2, magnetic circuit 3, vibrating diaphragm 4 and inductance 5, electric capacity 6, the resistance 7 of encouraging; Motion coil 1 is positioned at magnetic circuit 3 centers and drives vibrating diaphragm 4 sounding; Anti-excitation fixed coil 2 is fixed on the appropriate location of magnetic circuit 3; Be connected in parallel on motion coil 1 two ends after inductance 5, electric capacity 6, resistance 7 series connection; Be attached to drive signal again with after anti-excitation fixed coil 2 anti-phases are connected; Anti-excitation fixed coil 2 also is parallel with inductance 5, the impedance variations that is different from anti-excitation fixed coil 2 during 1 motion of motion coil by be arranged on motion coil 1 two ends, by inductance 5, electric capacity 6, resistance 7 and be connected in parallel on the corrective loop that the inductance 5 of anti-excitation fixed coil 2 two ends forms and proofread and correct, make drive signal reduce to minimum to harmful excitation of magnetic circuit 3.
The third embodiment: it is to be made up of motion coil 1, anti-fixed coil 2, magnetic circuit 3, vibrating diaphragm 4 and inductance 5, electric capacity 6, the resistance 7 of encouraging; Motion coil 1 is positioned at magnetic circuit 3 centers and drives vibrating diaphragm 4 sounding; Anti-excitation fixed coil 2 is fixed on the appropriate location of magnetic circuit 3; Anti-excitation fixed coil 2 series connection insert by the corrective loop of being made up of inductance 5, electric capacity 6, resistance 7; Be attached to drive signal again with after motion coil 1 parallel connected in reverse phase, be different from the corrective loop that the impedance variations of anti-excitation fixed coil 2 is made up of inductance 5, electric capacity 6, resistance 7 during motion coil 1 motion and proofread and correct, make drive signal reduce to minimum harmful excitation of magnetic circuit 3.
The 4th kind of embodiment: it is to be made up of motion coil 1, anti-fixed coil 2, magnetic circuit 3, vibrating diaphragm 4 and inductance 5, electric capacity 6, resistance 7 electricity of encouraging; Motion coil 1 is positioned at magnetic circuit 3 centers and drives vibrating diaphragm 4 sounding; Anti-excitation fixed coil 2 is fixed on the appropriate location of magnetic circuit 3; Anti-excitation fixed coil 2 is attached to drive signal in tandem electric inductance 5, electric capacity 6 backs with motion coil 1 parallel connected in reverse phase again; Be connected in parallel on anti-excitation fixed coil 2 two ends after 5 series connection of resistance 7 inductance; Be different from the corrective loop that the impedance variations of anti-excitation fixed coil 2 is made up of inductance 5, electric capacity 6, resistance 7 during motion coil 1 motion and proofread and correct, make drive signal reduce to minimum harmful excitation of magnetic circuit 3.
The 5th kind of embodiment: it is to be made up of motion coil 1, anti-fixed coil 2, magnetic circuit 3, vibrating diaphragm 4 and inductance 5, electric capacity 6, the resistance 7 of encouraging; Motion coil 1 is positioned at magnetic circuit 3 centers and drives vibrating diaphragm 4 sounding; Anti-excitation fixed coil 2 is fixed on the appropriate location of magnetic circuit 3; Anti-excitation fixed coil 2 is attached to drive signal in serial connection electric capacity 6 backs with motion coil 1 parallel connected in reverse phase again; Be connected in parallel on anti-excitation fixed coil 2 two ends again after the series connection of inductance 5 resistance 7, be different from the corrective loop that the impedance variations of anti-excitation fixed coil 2 is made up of inductance 5, electric capacity 6, resistance 7 during 1 motion of motion coil and proofread and correct, make drive signal reduce to minimum harmful excitation of magnetic circuit T.
Excitation energy diaphragm mass different and that motion coil 1 is driven according to 1 pair of magnetic circuit of anti-excitation fixed coil 2 and motion coil is different; And different to requirements such as loudspeaker impedance and QTS values, can select respective embodiments and appropriate dynamic impedance correction loop electrical quantity.
The present invention is not limited to above-mentioned each example; Want that various distortion are certainly arranged in the point range not departing from the present invention; Like wire producing inductance, be designed to inductance 5, resistance 7 one, in the loud speaker of the high frequency of only resetting, omit electric capacity 6 with the proper resistor rate ... Or the like.
Claims (5)
1. no magnetic hysteresis electrodynamic transducer with motional impedance corrective loop; Comprise motion coil (1), counter encourage fixed coil (2), magnetic circuit (3), vibrating diaphragm (4), inductance (5, electric capacity (6), resistance (7); This motion coil 1 is positioned at magnetic circuit 3 centers and drives vibrating diaphragm 4 sounding; Anti-excitation fixed coil (2) is fixed on the appropriate location of magnetic circuit (3); And connect with motion coil (1) anti-phase; It is characterized in that: this electrodynamic transducer also comprises the motional impedance corrective loop that is connected in motion coil (1) two end, is composed in series by inductance 5, electric capacity 6, resistance 7, and this motional impedance corrective loop makes the impedance operator of motional impedance characteristic and anti-excitation fixed coil (2) of motion coil (1) reach unanimity.
2. electrodynamic transducer according to claim 1; It is characterized in that: this electrodynamic transducer also comprises and is connected in anti-excitation fixed coil (2) loop and is connected in the motional impedance corrective loop in motion coil (1) loop, and this motional impedance corrective loop makes the impedance operator of motional impedance characteristic and anti-excitation fixed coil (2) of motion coil (1) reach unanimity.
3. no magnetic hysteresis electrodynamic transducer with motional impedance corrective loop; Comprise motion coil (1), anti-fixed coil (2), magnetic circuit (3), vibrating diaphragm (4), inductance (5), electric capacity (6), the resistance (7) of encouraging; This motion coil 1 is positioned at magnetic circuit 3 centers and drives vibrating diaphragm 4 sounding; Anti-excitation fixed coil (2) is fixed on the appropriate location of magnetic circuit (3); And with motion coil (1) parallel connected in reverse phase; It is characterized in that: this electrodynamic transducer also comprises and is connected in the motional impedance corrective loop that is composed in series by inductance 5, electric capacity 6, resistance 7 in anti-excitation fixed coil (2) loop, and this motional impedance corrective loop makes the impedance operator of motional impedance characteristic and anti-excitation fixed coil (2) of motion coil (1) reach unanimity.
4. electrodynamic transducer according to claim 3; It is characterized in that: this electrodynamic transducer also comprises and is connected in anti-excitation fixed coil (2) loop motional impedance corrective loop of being made up of T shape circuit inductance 5, electric capacity 6, resistance 7, and this motional impedance corrective loop makes the impedance operator of motional impedance characteristic and anti-excitation fixed coil (2) of motion coil (1) reach unanimity.
5. electrodynamic transducer according to claim 3; It is characterized in that: this electrodynamic transducer also comprises and is connected in anti-excitation fixed coil (2) loop motional impedance corrective loop of being made up of L shaped circuit inductance 5, electric capacity 6, resistance 7, and this motional impedance corrective loop makes the impedance operator of motional impedance characteristic and anti-excitation fixed coil (2) of motion coil (1) reach 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 |
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| Publication Number | Publication Date |
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| CN102790936A true CN102790936A (en) | 2012-11-21 |
| CN102790936B 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105554656A (en) * | 2016-02-29 | 2016-05-04 | 歌尔声学股份有限公司 | Moving-coil loudspeaker structure and audio playing device |
| CN112593919A (en) * | 2020-12-01 | 2021-04-02 | 中海油田服务股份有限公司 | Resistivity correction method and 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105554656A (en) * | 2016-02-29 | 2016-05-04 | 歌尔声学股份有限公司 | Moving-coil loudspeaker structure and audio playing device |
| CN105554656B (en) * | 2016-02-29 | 2019-05-07 | 歌尔股份有限公司 | Coil-moving speaker structure and audio playing apparatus |
| CN112593919A (en) * | 2020-12-01 | 2021-04-02 | 中海油田服务股份有限公司 | Resistivity correction method and device and storage medium |
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| CN102790936B (en) | 2015-01-14 |
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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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