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Method for applying single-supply error amplifier to negative high voltage power control circuit

A technology of error amplifier and negative high-voltage power supply, which is applied to control/regulation systems, conversion equipment and instruments without intermediate conversion to AC, and can solve the problems of complex peripheral circuits of error amplifiers, achieving good real-time performance, fewer components, The effect of high promotion and application value

Inactive Publication Date: 2012-05-23
THE 724TH RES INST OF CHINA SHIPBUILDING IND
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  • Application Information

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Problems solved by technology

[0004] For a negative output high-voltage power supply, the usual practice is: sample the output voltage with a resistor, get a negative low-voltage signal and send it to the error amplifier, and directly compare it with the negative reference voltage to generate an error voltage signal after amplification. The error amplifier must use a positive , Negative dual power supply, which not only adds a negative low-voltage power supply, but also complicates the peripheral circuit of the error amplifier

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  • Method for applying single-supply error amplifier to negative high voltage power control circuit
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  • Method for applying single-supply error amplifier to negative high voltage power control circuit

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Embodiment Construction

[0011] The specific implementation steps of the application method of the single power supply error amplifier in the negative high voltage power supply control circuit of the present invention can be found in figure 1 :

[0012] ① Perform resistance sampling on the output negative high voltage and convert it into a negative low voltage signal;

[0013] ②The single-supply error amplifier inverts the negative low-voltage signal to generate a positive voltage feedback signal with the same amplitude;

[0014] ③ The positive voltage feedback signal and the reference voltage are compared and amplified by the single-supply error amplifier to generate an error signal;

[0015] ④ Use the error signal to change the duty ratio of the drive control signal to achieve the purpose of adjusting the negative high voltage output.

[0016] The circuit schematic diagram of the application method of the single power supply error amplifier in the negative high voltage power supply control circuit...

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Abstract

The invention relates to a method for applying a single-supply error amplifier to a negative high voltage power control circuit. According to the application method, the sampling of the negative output voltage of a high voltage power supply by the common positive and negative double-supply error amplifier is broke through, and the sampling, phase reversal, comparative amplification and control adjustment of the output voltage of the negative high voltage power supply are realized through the single-supply error amplifier. The functional block diagram of the application method is shown as a figure in the specifications. The processing flow comprises the following steps of: sampling the output voltage of the negative high voltage power supply by using a resistor to obtain a negative low voltage signal; performing phase reversal on the sampled negative low voltage signal by using the single-supply error amplifier to obtain a positive low voltage signal; and transmitting the positive low voltage signal to single-supply error amplifier, comparing the positive low voltage signal with reference voltage, amplifying the positive low voltage signal, and outputting an error signal. The error signal can change the duty ratio of a power drive control signal, so that the final output voltage of the power supply is adjusted; and the method has a wide application prospect in the field of power supplies.

Description

technical field [0001] The invention belongs to special power supply technology, and adopts a single power supply error amplifier to realize negative high-voltage power supply output voltage sampling, phase inversion, comparison amplification and control adjustment. Background technique [0002] In the electric vacuum tube transmitter, the power supply for the electric vacuum tube is mostly negative high-voltage power supply, such as the slow wave line power supply of the gate control tube, the cathode power supply of the cathode control tube, and so on. For this kind of high-voltage power supply with high power and negative output, considering factors such as volume, weight and efficiency, the mode of switching power supply is usually adopted. [0003] In the switching power supply, by sampling the output voltage, the sampling result is fed back to the control circuit, and the control circuit compares it with the reference voltage to obtain an error voltage signal to contro...

Claims

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Application Information

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IPC IPC(8): H02M3/04H02M3/156
Inventor 蔡宝龙
Owner THE 724TH RES INST OF CHINA SHIPBUILDING IND
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