Harmonic suppression circuit
A technology of harmonic suppression and resonant circuit, applied in the field of electronics, can solve the problems of non-debugging, complicated replacement of magnetic rings, consistent technical indicators of magnetic rings, etc., and achieves the effect of flexible design, good size and low price
Inactive Publication Date: 2017-05-31
BEIJING NAURA MICROELECTRONICS EQUIP CO LTD
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- Abstract
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- Application Information
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Problems solved by technology
Since the magnetic rings cannot guarantee that the technical indicators of each batch of magnetic rings are consistent during the processing process, after the LC resonant circuit is formed, the overall indicators cannot meet the design requirements, and it cannot be debugged. It can only be solved by replacing the magnetic rings.
The work of replacing the magnetic ring is more complicated. When replacing the magnetic ring, it is necessary to weld the welding piece and the printed board of the piece, and then weld the copper column and the welding piece of the piece, and finally take out the magnetic ring and replace it with a new one. After the magnetic ring, follow the reverse operation of taking out the magnetic ring, and then install it back to the printed board
Method used
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[0015] The present invention and the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.
[0016] Such as figure 1 It is a 13.56MHz harmonic suppression circuit with a power of 3KW, including a first resonant circuit connected to a second resonant circuit; the first resonant circuit includes three capacitors connected in parallel and a first inductance; The second resonant circuit includes two parallel capacitors and a second inductor; both the first inductor and the second inductor are coil inductors.
[0017] The capacitors and inductors in the circuit form an LC resonant circuit, in which the resonant frequency of capacitors C1, C2, C3 and the first inductor L1 is 13.56MHz, the second harmonic of 27.12MHz, and the specifications of C1, C2 and C3 are 1.5kV and 390pF capacitors in turn , 2.5kV, 100pF capacitor and 2.5kV, 270pF capacitor. The resonant frequency of the ca...
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Abstract
The invention discloses a harmonic suppression circuit comprising a first resonance circuit connected with a second resonance circuit, wherein the first resonance circuit comprises three capacitors connected in parallel and a first inductor, the second resonance circuit comprises two capacitors connected in parallel and a second inductor, and both the first inductor and the second inductor are solenoid coil inductors. According to the solenoid coil inductors provided by the invention, inductance can be conveniently adjusted by prolonging or shortening the inductors, and thus the LC circuit is adjusted and calibrated. Both the first inductor and the second inductor provided by the invention are specifically designed for the harmonic suppression circuit, and have good size, appearance and performance, and lower price. Compared with existing integrated circuits, the circuit provided by the invention is more flexible in design, and two inductors of the circuit can be separately placed at different positions of a circuit board.
Description
technical field [0001] The invention belongs to the field of electronics and relates to a harmonic suppression circuit. Background technique [0002] For the harmonics in the radio frequency circuit, a harmonic suppression circuit can be used to eliminate them, but it is necessary to ensure that the resonance point in the harmonic suppression circuit is accurate. The LC resonance filter circuit can change the resonance point by changing L or C, and play the role of adjustment and calibration. But for high-power equipment, if you use an adjustable capacitor, you must choose a vacuum adjustable capacitor with a high withstand voltage of thousands of volts. This type of capacitor is large and expensive. A 3.5kV vacuum adjustable capacitor has a volume of φ60× 150mm, far larger than the design of general circuit boards, and the price is more than 1,000 yuan. If the tuning is realized by changing the inductance L, it is also difficult to adjust the inductance at present. [00...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H03H5/00
CPCH03H5/00
Inventor 赵亮周航李光健
Owner BEIJING NAURA MICROELECTRONICS EQUIP CO LTD