Vacuum capacitor capable of changing capacitance

• Main Authors: ZHANG DECAI, HONG JINGWEI
• Format: Patent
• Language: Chinese; English
• Published: 07.12.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY

The invention relates to the technical field of electronics, and discloses a vacuum capacitor capable of changing capacitance, which comprises an insulating rod, an upper shell, a lower shell, a fixed electrode, a movable electrode, a magnet, an insulating shell, a voice coil motor coil, a spring and a movable electrode connecting piece. The top end of the insulating rod is connected with the upper shell, and the bottom end of the insulating rod is provided with the lower shell. According to the invention, the coil of the voice coil motor is electrified, so that the coil of the voice coil motor generates a driving force magnetic field under the action of current, the magnet generates an induced electromotive force, and under the action of the induced electromotive force, the movable electrode moves in the direction perpendicular to the current direction of the coil of the voice coil motor because the current of the coil of the voice coil motor is different; therefore, the relative area between the movable ele