CN202111849U - Hysteresis-free electrodynamic transducer with dynamic impedance corrective loop - Google Patents
Hysteresis-free electrodynamic transducer with dynamic impedance corrective loop Download PDFInfo
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- CN202111849U CN202111849U CN2011201657900U CN201120165790U CN202111849U CN 202111849 U CN202111849 U CN 202111849U CN 2011201657900 U CN2011201657900 U CN 2011201657900U CN 201120165790 U CN201120165790 U CN 201120165790U CN 202111849 U CN202111849 U CN 202111849U
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Abstract
The utility model relates to a hysteresis-free electrodynamic transducer with a dynamic impedance corrective loop, in particular to the hysteresis-free electrodynamic transducer with the dynamic impedance corrective loop, which can make the audio frequency playback effect batter, and comprises a motion coil, a demotivating fixed coil, a magnetic circuit and a diaphragm, wherein the motion coil is located at the center of the magnetic circuit and is used for driving the diaphragm to sound, and the demotivating fixed coil is fixed at a proper position on the magnetic circuit and is in antiphase connection with the motion coil; and the electrodynamic transducer also comprises the dynamic impedance corrective loop which consists of an inductance, a capacitor and a resistor. The hysteresis-free electrodynamic transducer is characterized in that the dynamic impedance corrective loop consisting of the inductance, the capacitor and the resistor corrects the impedance difference between the dynamic impedance of the motion coil and the impedance of the demotivating fixed coil, so that the motivating energy jointly acted on the magnetic circuit by the motion coil and the demotivating fixed coil is lowered to the minimum, the distortion caused by a loudspeaker due to hysteresis is reduced to the minimum, and the distortion of the diaphragm connected with the motion coil is lowered.
Description
Technical field
The utility model relates to a kind of electrodynamic transducer, specifically is meant a kind of effective no magnetic hysteresis electrodynamic transducer with motional impedance corrective loop of audio playback that makes, and 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.
Inventor according to the utility model knows that 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.
The utility model content
The purpose of the utility model is for a kind of no magnetic hysteresis electrodynamic transducer with motional impedance corrective loop is provided; This no magnetic hysteresis electrodynamic transducer with motional impedance corrective loop is 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; Make motion coil and the acting in conjunction of anti-excitation fixed coil reach to minimum, make the playback distortion of devices such as loud speaker, earphone reduce to minimum in total excitation energy of magnetic circuit.
The utility model solves the technical scheme that its technical problem adopted: 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 of being made up of inductance 5, electric capacity 6, resistance 7; The motional impedance corrective loop utilizes intrinsic high frequency through characteristic of inductance intrinsic low frequency through characteristic, electric capacity and the intrinsic full frequency band current limiting characteristic of resistance; To be close to the mode of road shunting or restricted passage, make electric current that drive signal flows through anti-excitation fixed coil 2 extremely approach to flow through the electric current of motion coil 1.This motional impedance corrective loop can be connected in motion coil 1 loop, makes the electric current that flows through motion coil 1 extremely approach to flow through the electric current of anti-excitation fixed coil 2; This motional impedance corrective loop can also be connected in anti-excitation fixed coil 2, makes the electric current that flows through anti-excitation fixed coil 2 extremely approach to flow through the electric current of motion coil 1; This motional impedance corrective loop can also be connected in motion coil 1 loop and anti-excitation fixed coil 2 loops respectively, makes the electric current that flows through motion coil 1 extremely approach to flow through the electric current of anti-excitation fixed coil 2.The connecting mode and the parameter designing of the inductance 5 in all motion coil motional impedances corrective loop, electric capacity 6, resistance 7; The principle of Ying Zunding " the excitation energy diaphragm mass different and that motion coil 1 is driven according to 2 pairs of magnetic circuits of motion coil 1 and anti-excitation fixed coil is different; and loudspeaker impedance waited require different with QTS value; finally feasible when to this drive signal of electrodynamic transducer feed-in different frequency difference amplitudes of motional impedance corrective loop being arranged, the excitation energy that its magnetic circuit receives reaches to minimum ".
The beneficial effect that uses the utility model is because the utility model has been done correction to the motional impedance of motion coil 1; Make the anti-excitation of 2 pairs of magnetic circuits of excitation and anti-excitation fixed coil of 1 pair of magnetic circuit of electrodynamic transducer work luck moving winding level off to counteracting; 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 the utility model manufacturing, 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 utility model 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 utility model 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 utility model 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 electrical schematic diagram of Fig. 4, to be the utility model 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 utility model be designed with in anti-excitation fixed coil 2 loops tandem-type connection motional impedance corrective loop;
Fig. 6 is the utility model 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 utility model 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 utility model 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 utility model 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 utility model 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 utility model: 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 T shape 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 7 series connection of inductance 5 resistance; Be different from the L shaped 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 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 utility model is not limited to above-mentioned each example; Want that various distortion are certainly arranged in the point range not departing from the utility model; Like wire producing inductance 5, to be designed to one to inductance 5, resistance 7, in the loud speaker of the low frequency of only resetting, to 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), 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) center 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 the inductance (5) 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) center 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 |
|---|---|---|---|
| CN2011201657900U CN202111849U (en) | 2011-05-18 | 2011-05-18 | Hysteresis-free electrodynamic transducer with dynamic impedance corrective loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201657900U CN202111849U (en) | 2011-05-18 | 2011-05-18 | Hysteresis-free electrodynamic transducer with dynamic impedance corrective loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202111849U true CN202111849U (en) | 2012-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201657900U Expired - Lifetime CN202111849U (en) | 2011-05-18 | 2011-05-18 | Hysteresis-free electrodynamic transducer with dynamic impedance corrective loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202111849U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790936A (en) * | 2011-05-18 | 2012-11-21 | 吴琪君 | Hysteresis-free electrodynamic transducer with motional impedance rectifying return circuit |
-
2011
- 2011-05-18 CN CN2011201657900U patent/CN202111849U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790936A (en) * | 2011-05-18 | 2012-11-21 | 吴琪君 | Hysteresis-free electrodynamic transducer with motional impedance rectifying return circuit |
| CN102790936B (en) * | 2011-05-18 | 2015-01-14 | 吴琪君 | Hysteresis-free electrodynamic transducer with motional impedance rectifying return circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: YUYAO TEMPERATURE INSTRUMENT FACTORY CO., LTD. Assignor: Wu Qijun Contract record no.: 2012330000528 Denomination of utility model: Hysteresis-free electrodynamic transducer with motional impedance rectifying return circuit Granted publication date: 20120111 License type: Exclusive License Record date: 20121031 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120111 Effective date of abandoning: 20150114 |
|
| RGAV | Abandon patent right to avoid regrant |