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Filter capacitor rapid discharge circuit of numerical control power supply

A digitally controlled power supply and filter capacitor technology, applied in the field of power supply, can solve the problems of long adjustment time and achieve the effect of shortening the adjustment time and improving discharge efficiency

Active Publication Date: 2021-11-16
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide a fast discharge circuit for the filter capacitor of the digital control power supply, which is used to solve the problem of long adjustment time when the output voltage of the existing digital control power supply suddenly drops from a high value to a low value

Method used

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  • Filter capacitor rapid discharge circuit of numerical control power supply
  • Filter capacitor rapid discharge circuit of numerical control power supply
  • Filter capacitor rapid discharge circuit of numerical control power supply

Examples

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Embodiment 1

[0026] The main idea of ​​the present invention is that, based on the problem that the adjustment time is long when the output voltage suddenly drops from a high value to a low value, the present invention adds a fast discharge circuit for the filter capacitor in the numerical control unit, and the discharge circuit includes a signal comparison branch , the control branch, and the discharge branch, determine whether the voltage drops through the signal comparison branch, and output a control signal for the discharge of the discharge branch through the control branch after the drop, and then control the discharge branch to discharge. The present invention discharges the filter capacitor in time through the discharge circuit, shortening the adjustment time when the voltage drops.

[0027] Specifically, the fast discharge circuit of the filter capacitor of the digital control power supply is as follows: figure 1 As shown, it includes a signal comparison branch, a control branch, ...

Embodiment 2

[0040] The difference between the fast discharge circuit of the filter capacitor of the digital control power supply in this embodiment and the embodiment 1 is that the control branch adopts two triodes, and on the basis of the embodiment 1, the number of triodes is reduced, and the circuit is further simplified. save costs.

[0041] Specifically, the fast discharge circuit of the filter capacitor of the numerically controlled power supply in this embodiment is as follows: figure 2 As shown, it includes a signal comparison branch, a control branch, and a discharge branch.

[0042] The signal comparison branch and the discharge branch are the same as those in Embodiment 1, and will not be repeated here.

[0043] The control circuit includes a transistor Q1 and a transistor Q2. The transistor Q1 is an NPN transistor, and the transistor Q2 is a PNP transistor. The base of the transistor Q1 is connected to a voltage divider, and the collector of the transistor Q1 is connected to...

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Abstract

The invention relates to a filter capacitor rapid discharging circuit of a numerical control power supply, and belongs to the technical field of power supplies. The discharging circuit comprises an operational amplifier, a control branch circuit and a discharge branch; two input ends of the operational amplifier are respectively used for receiving an output voltage and a reference voltage; the output end of the operational amplifier is connected with a power conversion unit; the control end of the control branch circuit is connected with the output end of the operational amplifier, the input end of the control branch circuit is connected with a working power supply, and the control branch circuit outputs a corresponding control signal according to the output result of the operational amplifier so as to control the switch-on or switch-off of a switching tube in a discharge branch circuit; and the discharge branch circuit is connected with a capacitor in parallel and comprises a discharge load and the switching tube which are connected in series, and the control end of the switching tube is connected with the output end of the control branch circuit. According to the filter capacitor rapid discharge circuit of the numerical control power supply of the invention, under the condition of meeting a discharge condition, a filter capacitor is discharged by conducting the discharge branch circuit, so that the discharge efficiency of the filter capacitor is improved, and the adjustment time when the output voltage of the numerical control power supply suddenly drops from a high value to a low value is shortened.

Description

technical field [0001] The invention relates to a fast discharge circuit of a filter capacitor of a numerically controlled power supply, belonging to the technical field of power supplies. Background technique [0002] Numerical control power supply takes digital signal processor (DSP) or microcontroller (MCU) as the core, takes numerical control power driver, PWM controller, etc. as control objects, and can realize the power supply products of control, management and monitoring functions. It changes its external characteristics by setting the internal parameters of the switching power supply, effectively distributes the power supply to different components of the system, and minimizes losses. [0003] For the adjustable digital control power supply, the output voltage is artificially set. Taking the BUCK topology power supply as an example, the control loop controls the duty cycle of the power switch in the power conversion unit by sampling the output voltage and comparing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H02M1/08
CPCH02M1/00H02M1/08H02M1/32Y02B70/10
Inventor 李建兵许涛周东方刘庆郭静坤王妍董雪雨罗志豪李冰
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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