| 摘要 |
<p>This invention relates to a transducer which has double coils and double magnetic gaps. Upper and lower magnetic yokes are two concave flat-plates or circular flat-plates. The transducer provides one or more than three sets of permanent magnet(s) to charge magnetism to the yoke longitudinally. Said permanent magnets anastomose directly between two pole-faces of said flat-plates. Two magnetic gaps are formed by mounting the circumferential face perpendicular to the axle-holes and outer circumferential face of a cylindraceous or a rod shaped magnet coaxially. Coils are inserted into the magnetic gaps. The winding direction of two coils and the current direction are specified to make the coils produce electrodynamic force in the same direction as that of the current. If the transducer has a pair of magnetic circuit and coil circuit which their magnetic performance are fully symmetrical, the inductance of two coils are set to be equal, the transducer has the property of resistance load.</p> |
