Acquisition circuit for output current of high-frequency dust collection power source
A technology of output current and dust removal power supply, which is applied in the direction of measuring current/voltage, measuring electrical variables, voltage divider, etc., which can solve the problems of signal acquisition difficulties, increase of electromagnetic interference signals, increase of system complexity, etc., and achieve accurate and precise signals measured effect
Inactive Publication Date: 2014-12-17
江苏容天机电科技有限公司
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Problems solved by technology
However, the system complexity of the high-frequency power supply method is also increased compared with the power frequency power supply method
As the frequency of the power supply increases, the electromagnetic interference signal during system operation also increases accordingly, which makes it more difficult to collect the signal of the system.
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[0014] Attached below figure 1 The present invention is described in detail:
[0015] As shown in the figure, a high-frequency dust removal power supply output current acquisition circuit, the circuit includes a voltage divider circuit 1, a current sampling circuit 2, a filter suppression circuit 3, a proportional amplifier circuit 4 and a clamp filter circuit 5 connected in sequence. The voltage circuit is connected to the output of the power supply to divide the output voltage of the power supply. The output current is collected by the current sampling circuit and converted into a voltage signal. After being processed by the filter wave suppression circuit, it is input to the proportional amplification circuit. After the voltage is followed, it is input through the clamp filter circuit. to the digital signal processing unit.
[0016] The voltage dividing circuit includes a first resistor R1, which is a high-power voltage dividing resistor of 150 MΩ, connected between the ou...
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The invention discloses an acquisition circuit for the output current of a high-frequency dust collection power source. The acquisition circuit comprises a voltage dividing circuit, a current sampling circuit, a suppression filter circuit, a proportional amplifying circuit and a clamping filter circuit, all of which are connected together orderly; the voltage dividing circuit is used for dividing the output high voltage of the power source; the output current is acquired and converted into a voltage signal by the current sampling circuit, and the voltage signal is input into the proportional amplifying circuit after being processed by the suppression filter circuit, and then the signal is input into the digital signal processing unit by use of the clamping filter circuit after voltage tracking. The acquisition circuit for the output current of the high-frequency dust collection power source is simplified because few elements are adopted, and real-time detection of the acquisition circuit on the output current of the power source is guaranteed. Multiple filter circuits are adopted to guarantee the reliability of the signal; the output signal can be directly input into the digital signal processing unit.
Description
technical field [0001] The invention belongs to the field of high-frequency power supplies, in particular to a collection circuit for the output current of a high-frequency dust-removing power supply composed of a high-power precision resistor and a proportional amplifier AD8034. Background technique [0002] With the continuous development of modern industry and the advancement of power electronics technology, the traditional power frequency dust removal power supply has been unable to meet the current dust removal requirements. The high-frequency dust removal power supply is replacing the market position of the power frequency dust removal power supply with its advantages of high output efficiency, small output ripple, and the ability to greatly improve the dust removal efficiency. However, the system complexity of the high-frequency power supply method also increases compared with the power frequency power supply method. As the frequency of the power supply increases, t...
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IPC IPC(8): G01R15/06G01R19/00
Inventor 陈峰翟林林曾庆军孙国平
Owner 江苏容天机电科技有限公司