A kind of integration circuit of resonant current of high frequency dust removal power supply
A technology of integrating circuit and dust removal power supply, which is applied in the direction of voltage/current isolation, measurement of electric variables, and measurement using digital measurement technology. External disturbances, easy-to-achieve effects
Active Publication Date: 2016-04-06
ZHENJIANG TIANLI TRANSFORMER
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Problems solved by technology
[0003] Aiming at the problem that the existing signal detection circuit cannot adapt to the high-frequency high-voltage power supply, the purpose of the present invention is to provide an integration circuit for the resonant current of the high-frequency dust removal power supply. The circuit uses a Hall current transformer to sample the high-frequency resonant current signal. The parallel resistance converts the current signal into a voltage signal, and the analog circuit processes the high-frequency voltage signal, takes the absolute value of the AC signal and performs optocoupler isolation processing, isolates the analog signal from the digital signal, reduces mutual influence, and then extracts the signal Anti-parallel integration, and the integration is controllable, and finally the filtered signal is sent to DSP
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[0017] Attached below figure 1 and figure 2 Embodiments of the present invention are described in detail:
[0018] like figure 1 As shown, this embodiment includes: a current detection circuit 1 , an absolute value circuit 2 , an optocoupler isolation circuit 3 , an inverting circuit 4 , an integrating circuit 5 , a limiting filter circuit 6 , and an integrating switch circuit 7 . Among them, the current detection circuit, the absolute value circuit, the optocoupler isolation circuit, the inverting circuit and the integral circuit are connected successively, and the limiting filter circuit and the integral switch circuit are all connected with the integral circuit.
[0019] In the current detection circuit, the Hall current transformer CT (model LT308-S7) senses the current I of the primary side of the high-frequency high-voltage power supply, and the parallel resistor R1 converts the induced current into a voltage, and then connects the capacitor C1 and the transient suppr...
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The invention discloses an integrating circuit for a resonance current of a high-frequency precipitation power supply. The integrating circuit comprises a current detection circuit, an absolute value circuit, an optical coupling isolation circuit, a phase-inverter circuit, an integrating circuit, an amplitude limiting filtering circuit and an integral switching circuit, wherein the current detection circuit, the absolute value circuit, the optical coupling isolation circuit, the phase-inverter circuit and the integrating circuit are sequentially connected; and both the amplitude limiting filtering circuit and the integral switching circuit are connected with the integrating circuit. The circuit disclosed by the invention has a simple principle and strong anti-interference capacity, can accurately reflect a measured value, has good linearity and strong practicality and is easy to implement.
Description
technical field [0001] The invention relates to an integral circuit for the resonant current of a high-frequency dust removal power supply. Background technique [0002] With the advancement of science and technology and the development of society, a new type of high-frequency dust removal power supply has emerged at the historic moment. How to achieve effective control of the power supply must be inseparable from the detection of the power supply signal. The environment is complex and the interference is serious. At present, the commonly used signal detection circuit has been difficult to meet the detection requirements of the signal, the anti-interference ability is weak, the measurement signal range is small, and it is difficult to adapt to the electric field and magnetic field environment of high-frequency high-voltage power supply. Contents of the invention [0003] Aiming at the problem that the existing signal detection circuit cannot adapt to the high-frequency hig...
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IPC IPC(8): G01R19/25G01R15/00G01R15/22
Inventor 陈峰曾庆军张磊孙国平
Owner ZHENJIANG TIANLI TRANSFORMER