CN202261024U

CN202261024U - Intelligent type DC high voltage generator

Info

Publication number: CN202261024U
Application number: CN201120303059XU
Authority: CN
Inventors: 肖智俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-19
Filing date: 2011-08-19
Publication date: 2012-05-30
Anticipated expiration: 2021-08-19

Abstract

The utility model provides an intelligent type DC high voltage generator, comprising a rectification filtering circuit, a pulse power regulation circuit, a bridge type inverting circuit, a middle frequency high voltage transformer, a voltage doubling rectification circuit, a microprocessor, a voltage current analog quantity collection circuit, an overcurrent protection circuit, a pulse width power control circuit and a voltage output negative feedback circuit, wherein the voltage current analog quantity collection circuit collects a DC high voltage output signal, then performs A/D conversion on the DC high voltage output signal and then is connected with the microprocessor, the overcurrent protection circuit is connected with the microprocessor through an A/D conversion interface and enables the output end thereof to be connected with the bridge type inverting circuit, the output end of the voltage doubling rectification circuit is input into the pulse width power control circuit through the voltage negative feedback circuit, the pulse width power control circuit is controlled by the output of the microprocessor through a D/A conversion circuit, and inside the microprocessor there is provided a corresponding control software. The intelligent type DC high voltage generator has the advantages of being high in precision and better in PWM linearity, is convenient for setting an overcurrent protection current value, and is small in voltage drift.

Description

The intelligent DC high pressure generator

Technical field

The utility model relates to electronic device field, specifically is meant a kind of intelligent DC high pressure generator.

Background technology

High voltage direct current generator is that a kind of being used for detected the electric insulation intensity of electrical device and the electronic equipment of leakage current, is applicable to that mainly enterprise's power departments such as power department, industrial and mineral, metallurgy, iron and steel carry out DC voltage withstand test to high voltage electric equipments such as zinc oxide arrester, power cable, transformer, generators.

Existing high voltage direct current generator generally comprises current rectifying and wave filtering circuit, pulse power regulating circuit, bridge inverter main circuit, intermediate frequency high-tension transformer and voltage doubling rectifing circuit; Existing high voltage direct current generator adopts open loop control usually; PWM has the inaccurate linearity, and ripple coefficient is bigger, and the precision of instrument is not high; In addition, in use there is the problem that to set current value and voltage output drift.

The utility model content

The technical problem that the utility model will solve is to the existing in prior technology weak point; Provide a kind of precision higher, the PWM linearity better, the intelligent DC high pressure generator of the problem being convenient to set the overcurrent protection current value and efficiently solve voltage drift.

The technical solution of the utility model is; Following a kind of intelligent DC high pressure generator is provided; Comprise current rectifying and wave filtering circuit, pulse power regulating circuit, bridge inverter main circuit, intermediate frequency high-tension transformer and voltage doubling rectifing circuit; Also comprise microprocessor, electric current and voltage analog acquisition circuit, current foldback circuit, pulsewidth power control circuit and voltage output negative-feedback circuit; Described electric current and voltage analog acquisition circuit is gathered high direct voltage output signal and after the A/D conversion, is connected microprocessor; Described current foldback circuit connects microprocessor through the A/D translation interface and output connects bridge inverter main circuit; The output of described voltage doubling rectifing circuit is input to the pulsewidth power control circuit through voltage negative feedback circuit, and described pulsewidth power control circuit is controlled by the output of microprocessor through the D/A change-over circuit, control corresponding software is installed in the described microprocessor.

Employing with the top scheme after; The utility model intelligent DC high pressure generator is provided with microprocessor; And realized control to pulsewidth power control circuit, current foldback circuit through the Control Software of microprocessor, in use, described electric current and voltage analog acquisition circuit is gathered the voltage and current parameter of high direct voltage output in real time and after the A/D conversion, is input to microprocessor; Microprocessor is exported control to the pulsewidth power control circuit automatically according to the situation of high direct voltage output; Thereby improve the precision of output greatly, the linearity of PWM also improves greatly, also can set through microprocessor easily for the current value of overcurrent protection; Described in addition dc high-voltage output end also is input to the pulsewidth power control circuit through voltage negative feedback circuit, thereby has improved the problem of output voltage drift greatly.Thereby the output accuracy of the utility model intelligent DC high pressure generator is higher, has the problem that the PWM linearity is better, be convenient to set the advantage of overcurrent protection current value and efficiently solve voltage drift.

As improvement, also comprise LCD MODULE, printout module and keyboard input module, described LCD MODULE, printout module and keyboard input module all are connected with an I/O mouth of microprocessor.

After above-mentioned improvement; Can be implemented in printing function under free voltage, the electric current according to actual needs; And can data directly be presented on the LCD MODULE, in addition, also can conveniently realize setting to overcurrent protection value and operating time section through the keyboard input module.

Description of drawings

It in the accompanying drawing circuit block diagram structural representation of the utility model intelligent DC high pressure generator.

Shown in the figure:

1, current rectifying and wave filtering circuit, 2, the pulse power regulating circuit, 3, bridge inverter main circuit; 4, intermediate frequency high-tension transformer, 5, voltage doubling rectifing circuit, 6, microprocessor; 7, electric current and voltage analog acquisition circuit, 8, current foldback circuit, 9, pulsewidth power control circuit, 10, voltage negative feedback circuit; 11, LCD MODULE, 12, the printout module, 13, the keyboard input module.

Embodiment

For ease of explanation,, the intelligent DC high pressure generator of utility model is elaborated below in conjunction with accompanying drawing:

Shown in accompanying drawing; A kind of intelligent DC high pressure generator; Comprise current rectifying and wave filtering circuit 1, pulse power regulating circuit 2, bridge inverter main circuit 3, intermediate frequency high-tension transformer 4 and voltage doubling rectifing circuit 5; Also comprise microprocessor 6, electric current and voltage analog acquisition circuit 7, current foldback circuit 8, pulsewidth power control circuit 9 and voltage output negative-feedback circuit 10; Described electric current and voltage analog acquisition circuit 7 is gathered high direct voltage output signal and after the A/D conversion, is connected microprocessor 6; Described current foldback circuit 8 connects microprocessor 6 through the A/D translation interface and output connects bridge inverter main circuit 3, and the output of described voltage doubling rectifing circuit 5 is input to pulsewidth power control circuit 9 through voltage negative feedback circuit 10, and described pulsewidth power control circuit 9 is controlled by the output of microprocessor 6 through the D/A change-over circuit; In the described microprocessor 6 control corresponding software is installed; In the present embodiment, also comprise LCD MODULE 11, printout module 12 and keyboard input module 3, described LCD MODULE 11, printout module 12 all are connected with an I/O mouth of microprocessor 6 with keyboard input module 3.

Should explain at this; In implementation process; Described D/A or A/D change-over circuit also can directly use the D/A or the A/D interface of microprocessor, and described microprocessor 6 can be selected suitable single-chip microcomputer according to actual conditions, like the ARMLPC2138 series monolithic of PHILIPS Co..

In the above-described embodiments, the preferred forms of the utility model is described, obviously, under the inventive concept of the utility model, still can be made a lot of variations or improvement.At this, should explain that any change of under the inventive concept of the utility model, being made all will fall in the protection range of the utility model.

Claims

1. intelligent DC high pressure generator; Comprise current rectifying and wave filtering circuit (1), pulsewidth power conditioning circuitry (2), bridge inverter main circuit (3), intermediate frequency high-tension transformer (4) and voltage doubling rectifing circuit (5); It is characterized in that: also comprise microprocessor (6), electric current and voltage analog acquisition circuit (7), current foldback circuit (8), pulsewidth power control circuit (9) and voltage output negative-feedback circuit (10); Described electric current and voltage analog acquisition circuit (7) is gathered high direct voltage output signal and after the A/D conversion, is connected microprocessor (6); Described current foldback circuit (8) connects microprocessor (6) through the A/D translation interface and output connects bridge inverter main circuit (3); The output of described voltage doubling rectifing circuit (5) is input to pulsewidth power control circuit (9) through voltage negative feedback circuit (10); Described pulsewidth power control circuit (9) is controlled by the output of microprocessor (6) through the D/A change-over circuit, described microprocessor is equipped with control corresponding software in (6).

2. intelligent DC high pressure generator according to claim 1; It is characterized in that: also comprise LCD MODULE (11), printout module (12) and keyboard input module (3), described LCD MODULE (11), printout module (12) and keyboard input module (3) all are connected with an I/O mouth of microprocessor (6).