Resonance circuit for converting high-power square wave into sine wave
Through the combination of high-power square wave generator and resonant circuit, the combination of series and parallel resonant circuits is used to solve the problems of complex circuit design and high cost, and the efficient energy conversion from square wave to sine wave is realized, and the performance of the circuit is improved and security.
Patent Information
- Application Number
- CN202420816055.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-19
AI Technical Summary
The existing high-power square wave to sine wave technology has problems such as complex circuit design, high production costs and inability to effectively convert square wave energy into sine wave energy.
Using a combination of a high-power square wave generator, a first resonant circuit and a second resonant circuit, the energy conversion from square wave to sine wave is realized through the combination of series and parallel resonant circuits, including the series connection of the first inductor and the first capacitor. , a parallel connection of the second inductor and the second capacitor, and a series connection of the third inductor and the third capacitor, are used for filtering and current limiting.
It simplifies circuit design, reduces production costs, improves circuit flexibility and safety, effectively removes harmonics other than fundamental waves, improves power quality and performance, and reduces energy loss.
Smart Images
Figure CN222215698U_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of electric signal conversion circuits, and in particular to a resonant circuit for converting high-power square waves into sine waves. Background Art
[0002] High-power square wave power supplies are widely used in equipment used in industries such as solar photovoltaics, industrial coating, plasma cleaning, nanomaterial processing, material surface modification, and semiconductor etching. They can provide high voltage and high current and stable square wave output to the equipment, which is conducive to reducing electromagnetic interference. The fast response of square wave power supplies can provide power support for loads or applications that require rapid changes. However, high-power square wave power supplies often cannot provide power to all electronic devices in the same device at the same time. For example, in applications that require continuous power regulation, a sine wave power input is required to achieve smooth power control. Usually, an additional circuit is introduced to achieve the function of converting square waves to sine waves.
[0003] However, the current technology for converting square waves into sine waves has problems such as complex circuit design, high production cost, and inability to effectively convert square wave energy into sine wave energy. Summary of the invention
[0004] In view of this, the utility model provides a high-power square wave to sine wave resonant circuit, which effectively solves the technical defects of square wave to sine wave technology, such as complex circuit design, high production cost and ineffective conversion of square wave energy into sine wave energy.
[0005] To achieve the above-mentioned purpose, the utility model provides a resonant circuit for converting a high-power square wave to a sine wave, characterized in that it includes a high-power square wave generator, a first resonant circuit A1 and a second resonant circuit A2; the INPUTA end of the high-power square wave generator is connected to one end of the first resonant circuit A1, the other end of the first resonant circuit A1 is connected to one end of the second resonant circuit A2, and the other end of the second resonant circuit A2 is connected to the INPUTB end of the high-power square wave generator.
[0006] As a further improvement of the above solution:
[0007] Preferably, the first resonant circuit A1 includes a first inductor L1 and a first capacitor C1, one end of the first inductor L1 is connected to the INPUTA end of the high-power square wave generator, and the other end of the first inductor L1 is connected in series to one end of the first capacitor C1.
[0008] Preferably, the second resonant circuit A2 includes a second inductor L2 and a second capacitor C2, the second inductor L2 and the second capacitor C2 are connected in parallel, the connection point between the second inductor L2 and the second capacitor C2 is connected to one end of the first capacitor C1, and the other connection point between the second inductor L2 and the second capacitor C2 is connected to the INPUTB terminal and the OUTB terminal of the high-power square wave generator.
[0009] Preferably, the high-power square wave to sine wave circuit also includes a third resonant circuit A3, the third resonant circuit A3 includes a third inductor L3 and a third capacitor C3, the third inductor L3 and the third capacitor C3 are connected in series, one end of the third inductor L3 is connected to the connection point of the first-stage series resonant circuit A1 and the second-stage parallel resonant circuit A2, and one end of the third capacitor C3 is connected to the output end OUTA.
[0010] Compared with the prior art, the beneficial effects of the utility model are:
[0011] 1. The combined use of basic series and parallel resonant circuits not only simplifies the existing complex circuit design, increases the flexibility of the circuit, but also greatly reduces the circuit production cost; in the case of high power input, parallel resonance can effectively limit the circuit current and prevent circuit overload. The combined use improves the safety of the circuit and reduces the failure rate of the circuit.
[0012] 2. The combined use of series resonant circuit and parallel resonant circuit can effectively remove harmonics other than the fundamental wave, selectively amplify or suppress signals of specific frequencies, and efficiently convert the square wave energy output by the previous high-power square wave generator into sinusoidal wave energy of the same frequency, thereby improving the performance of the circuit and the quality of electric energy and reducing energy loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.
[0014] Figure 1 The utility model is a schematic diagram of a resonant circuit for converting a high-power square wave into a sine wave. DETAILED DESCRIPTION
[0015] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.
[0016] The utility model provides the following technical solutions:
[0017] As attached Figure 1 As shown, the technical solution of the utility model mainly includes a high-power square wave generator, a first resonant circuit A1, a second resonant circuit A2 and a third resonant circuit A3, the INPUTA end of the high-power square wave generator is connected to one end of the first resonant circuit A1, the other end of the first resonant circuit A1 is connected to one end of the second resonant circuit A2, the other end of the second resonant circuit A2 is connected to the INPUTB end of the high-power square wave generator, one end of the third resonant circuit A3 is connected to the connection point of the first resonant circuit A1 and the second resonant circuit A3, and the other end of the third resonant circuit A3 is connected to the OUTB end.
[0018] The first resonant circuit A1 includes a first inductor L1 and a first capacitor C1, one end of the first inductor L1 is connected to the INPUTA end of the high-power square wave generator, and the other end of the first inductor L1 is connected in series to one end of the first capacitor C1; the first inductor L1 and the first capacitor C1 inside the first resonant circuit A1 are connected in series, so that the impedance on the line is equal to zero at the resonant frequency, the energy loss in the circuit is relatively small, and the energy transmission efficiency is high. At the same time, the first resonant circuit A1 can transmit signals at the resonant frequency, thereby realizing filtering of the specific frequency square wave signal input by the previous high-power square wave generator.
[0019] The second resonant circuit A2 includes a second inductor L2 and a second capacitor C2, the second inductor L2 and the second capacitor C2 are connected in parallel, the connection point between the second inductor L2 and the second capacitor C2 is connected to one end of the first capacitor C1, and the other connection point between the second inductor L2 and the second capacitor C2 is connected to the INPUTB terminal and the OUTB terminal of the high-power square wave generator; the second inductor L2 and the second capacitor C2 inside the second resonant circuit A2 are connected in parallel, so that the impedance on the line reaches infinity at the resonant frequency, the current generated by the first resonant circuit A1 is limited, the circuit is prevented from being overloaded, and the circuit is protected from being damaged and causing circuit failure. At the same time, in the resonant state, the second resonant circuit A2 filters the square wave signal of a specific frequency input by the previous high-power square wave generator again on the basis of the filtering of the first resonant circuit A1.
[0020] The third resonant circuit A3 includes a third inductor L3 and a third capacitor C3, which are connected in series. One end of the third inductor L3 is connected to the connection point of the first-stage series resonant circuit A1 and the second-stage parallel resonant circuit A2, and one end of the third capacitor C3 is connected to the output terminal OUTA. The third inductor L3 and the third capacitor C3 in the third resonant circuit A3 are connected in series, which can more effectively filter out the harmonics other than the fundamental wave of the square wave signal.
[0021] The sizes of the first inductor L1 and the first capacitor C1, the second inductor L2 and the second capacitor C2, and the third inductor L3 and the third capacitor C3 are determined according to the square wave frequency input by the high-power square wave generator.
[0022] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A high-power square wave to sine wave resonant circuit, characterized in that: It includes a high-power square wave generator, a first resonant circuit A1 and a second resonant circuit A2; the INPUTA end of the high-power square wave generator is connected to one end of the first resonant circuit A1, the other end of the first resonant circuit A1 is connected to one end of the second resonant circuit A2, and the other end of the second resonant circuit A2 is connected to the INPUTB end of the high-power square wave generator.
2. A high-power square wave to sine wave resonant circuit according to claim 1, characterized in that: The first resonant circuit A1 includes a first inductor L1 and a first capacitor C1. One end of the first inductor L1 is connected to the end of the high-power square wave generator INPUTA, and the other end of the first inductor L1 is connected in series to one end of the first capacitor C1.
3. A high-power square wave to sine wave resonant circuit according to claim 1, characterized in that: The second resonant circuit A2 includes a second inductor L2 and a second capacitor C2. The second inductor L2 and the second capacitor C2 are connected in parallel. The connection point between the second inductor L2 and the second capacitor C2 is connected to one end of the first capacitor C1. The other connection point between the second inductor L2 and the second capacitor C2 is connected to the INPUTB terminal and the OUTB terminal of the high-power square wave generator.
4. A high-power square wave to sine wave resonant circuit according to claim 1, characterized in that: It also includes a third resonant circuit A3, which includes a third inductor L3 and a third capacitor C3. The third inductor L3 and the third capacitor C3 are connected in series, one end of the third inductor L3 is connected to the connection point of the first-stage series resonant circuit A1 and the second-stage parallel resonant circuit A2, and one end of the third capacitor C3 is connected to the output end OUTA.