CN202918213U

CN202918213U - Novel inverter

Info

Publication number: CN202918213U
Application number: CN 201220628582
Authority: CN
Inventors: 龚德斌
Original assignee: YUEQING YUANPU ELECTRONICS CO Ltd
Current assignee: YUEQING YUANPU ELECTRONICS CO Ltd
Priority date: 2012-11-26
Filing date: 2012-11-26
Publication date: 2013-05-01
Anticipated expiration: 2022-11-26

Abstract

The utility model discloses an inverter. The inverter is advantageous in simple circuits, operational easiness, and cost-saving property. The inverter includes a direct current input port; output ends of the direct current input port are connected with a direct current voltage-boosting circuit, and an input over-voltage under-voltage detection circuit respectively; an output end of the direct current voltage-boosting circuit is connected with a rectifying and filtering circuit; output ends of the rectifying and filtering circuit are connected with a direct current voltage feedback circuit, an H-bridge inverter, and an output short-circuit detection circuit; output ends of the H-bridge inverter are connected with an output LC filtering and high-frequency filtering circuit, and an overload protection circuit respectively; an output end of the output LC filtering and high-frequency filtering circuit is connected with an alternating current output port circuit; an input end of the rectifying and filtering circuit is connected with a PWM push-pull control circuit; the direct current voltage feedback circuit is connected with an input end of the PWM push-pull control circuit; an output end of the overload protection circuit is connected with the direct current voltage feedback circuit and an MCU single-chip microcomputer controller I; an input end of the H-bridge inverter is connected with a SPWM driving circuit; and an input end of the SPWM driving circuit is connected with the output short-circuit detection circuit, an MCU single-chip controller II and a system auxiliary power supply.

Description

A kind of novel inverter

Technical field

The utility model relates to the controlling electric energy technical field, particularly a kind of novel inverter.

Background technology

Applying to now solar energy is that the direct current of solar energy, wind energy or automobile engine is stored in the storage battery by control circuit in net electricity generation system, wind power generation system or vehicle power generation system.Re-use inverter the direct current of storage battery is converted to alternating current output.But existing inverter mostly exists hardware circuit complexity, debug difficulties, poor anti jamming capability and has the shortcomings such as temperature drift, causes the effect of actual use not fully up to expectations.

In view of this, the inventor has this case to produce for the defects further investigation that highlights in the prior art then.

The utility model content

In order to overcome above shortcomings part in the prior art, the purpose of this utility model is to provide a kind of novel inverter.

In order to reach above-mentioned purpose; the utility model adopts following concrete technical scheme: a kind of novel inverter; comprise the direct-flow input end mouth; the first output of described direct-flow input end mouth be connected output and connect respectively DC voltage booster circuit; the input overvoltage undervoltage detection circuit; the output of described DC voltage booster circuit connects current rectifying and wave filtering circuit; the first output of current rectifying and wave filtering circuit; the second output connects respectively the direct voltage feedback circuit with the 3rd output; inversion H bridge and output short-circuit testing circuit; the first output of described inversion H bridge be connected output and connect respectively output LC filtering and high-frequency filter circuit; overload protecting circuit; the output of described output LC filtering and high-frequency filter circuit connects the ac output end mouth; the input of described current rectifying and wave filtering circuit connects PWM and recommends control circuit; described DC circuit feedback circuit connects the first input end that PWM recommends control circuit; the first output of described overload protecting circuit be connected output and connect the direct voltage feedback circuit; MCU singlechip controller I; the input of described inversion H bridge connects SPWM drive circuit, the first input end of SPWM drive circuit; the second input and the 3rd input are connected with the output short-circuit testing circuit; MCU singlechip controller II and system supplymentary power supply.

The input of described system supplymentary power supply connects direct-flow input end mouth circuit, and first, second, and third output of described system supplymentary power supply connects respectively overload protecting circuit, SPWM drive circuit, MCU singlechip controller II, output short-circuit testing circuit and 5V USB power interface.

First, second, third of described MCU singlechip controller I connects respectively input overvoltage undervoltage detection circuit, overload protecting circuit, MCU singlechip controller II and temperature detection with the 4th input, and first and second the output of described MCU singlechip controller I respectively tap cooling blower and PWM is recommended control circuit.

First and second the input of described MCU singlechip controller II connects output short-circuit testing circuit and alternating voltage feedback.

Described SPWM drive circuit comprises 24 resistance R 1-R24,16 diode D1-D16,8 capacitor C 1-C8 and 4 voltage U 1-U4 parallel connection.

Described system supplymentary power supply comprises 9 resistance R 25-R33,15 capacitor C 9-C23,8 diode D17-D24,1 voltage U 5 and 1 inductance coil F1 parallel connection.

Described MCU singlechip controller I comprises 7 resistance R 34-R40,11 capacitor C 24-C34,2 voltage U 6-U7 and 1 crystal oscillator X1 parallel connection.

Compared with prior art, the utlity model has following outstanding advantages and effect:

1, the utility model adopts the MCU single-chip microcomputer to replace hardware circuit, and more stable before, circuit is fairly simple, and the built-in function available programs is upgraded, easily rectification;

2, the utility model has increased frequency converter SPWM drive circuit circuit, can produce the drive circuit of negative pressure with light-coupled isolation, and this circuit anti-interference ability is strong, can prevent that IGBT the Miller effect or the metal-oxide-semiconductor the Miller effect in the circuit from burning pipe, saves cost;

3, the utility model has substituted the pump voltage driving with adopting accessory power supply directly to drive circuitry, and accessory power supply can be given separately drive circuitry, drives more stablely, and drive current is larger, has improved operating efficiency.This accessory power supply has been simplified complicated power circuit except provide stable driving power to be simultaneously single-chip microcomputer and other circuit supply for the SPWM drive circuit.

Description of drawings

Fig. 1 is theory diagram of the present utility model;

Fig. 2 is the circuit diagram of the utility model SPWM drive circuit;

Fig. 3 is the circuit diagram of the utility model system supplymentary power supply;

Fig. 4 be the utility model MCU singlechip controller I circuit diagram;

The utility model is described in further detail below in conjunction with accompanying drawing.

Embodiment

In order further to explain the technical solution of the utility model, the utility model is elaborated below by specific embodiment.

Such as Fig. 1; Fig. 2; Fig. 3; shown in Figure 4; a kind of novel inverter; comprise the direct-flow input end mouth; the direct-flow input end mouth that is used for input DC power; the first output of direct-flow input end mouth be connected output and connect respectively DC voltage booster circuit; the input overvoltage undervoltage detection circuit; the output of described DC voltage booster circuit connects current rectifying and wave filtering circuit; the first output of current rectifying and wave filtering circuit; the second output connects respectively the direct voltage feedback circuit with the 3rd output; inversion H bridge and output short-circuit testing circuit; the first output of described inversion H bridge be connected output and connect respectively output LC filtering and high-frequency filter circuit; overload protecting circuit; the output of described output LC filtering and high-frequency filter circuit connects ac output end mouth circuit; the input of described current rectifying and wave filtering circuit connects PWM and recommends control circuit; described DC circuit feedback circuit connects the first input end that PWM recommends control circuit; the first output of described overload protecting circuit be connected output and connect the direct voltage feedback circuit; MCU singlechip controller I; the input of described inversion H bridge connects the SPWM drive circuit; the first input end of SPWM drive circuit; the second input and the 3rd input are connected with the output short-circuit testing circuit; MCU singlechip controller II and system supplymentary power supply; the input of described system supplymentary power supply connects direct-flow input end mouth circuit; first of described system supplymentary power supply; second connects respectively overload protecting circuit with the 3rd output; the SPWM drive circuit; MCU singlechip controller II; output short-circuit testing circuit and 5V USB power interface; first of described MCU singlechip controller I; second; third and fourth input connects respectively the input overvoltage undervoltage detection circuit; overload protecting circuit; MCU singlechip controller II and temperature detection; first and second the output of described MCU singlechip controller I respectively tap cooling blower and PWM is recommended control circuit; first and second the input of described MCU singlechip controller II connects output short-circuit testing circuit and alternating voltage feedback; described SPWM drive circuit comprises 24 resistance R 1-R24; 16 diode D1-D16; 8 capacitor C 1-C8 and 4 voltage U 1-U4 parallel connection; described system supplymentary power supply comprises 9 resistance R 25-R33; 15 capacitor C 9-C23; 8 diode D17-D24; 1 voltage U 5 and 1 inductance coil F1 parallel connection; described MCU singlechip controller I comprises 7 resistance R 34-R40; 11 capacitor C 24-C34,2 voltage U 6-U7 and 1 crystal oscillator X1 parallel connection.

It should be noted that at last: above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1. novel inverter; it is characterized in that: comprise the direct-flow input end mouth; the first output of described direct-flow input end mouth circuit be connected output and connect respectively DC voltage booster circuit; the input overvoltage undervoltage detection circuit; the output of described DC voltage booster circuit connects current rectifying and wave filtering circuit; the first output of current rectifying and wave filtering circuit; the second output connects respectively the direct voltage feedback circuit with the 3rd output; inversion H bridge and output short-circuit testing circuit; the first output of described inversion H bridge be connected output and connect respectively output LC filtering and high-frequency filter circuit; overload protecting circuit; the output of described output LC filtering and high-frequency filter circuit connects ac output end mouth circuit; the input of described current rectifying and wave filtering circuit connects PWM and recommends control circuit; described DC circuit feedback circuit connects the first input end that PWM recommends control circuit; the first output of described overload protecting circuit be connected output and connect the direct voltage feedback circuit; MCU singlechip controller I; the input of described inversion H bridge connects SPWM drive circuit, the first input end of SPWM drive circuit; the second input and the 3rd input are connected with the output short-circuit testing circuit; MCU singlechip controller II and system supplymentary power supply.

2. described a kind of novel inverter according to claim 1; it is characterized in that: the input of described system supplymentary power supply connects direct-flow input end mouth circuit, and first, second, and third output of described system supplymentary power supply connects respectively overload protecting circuit, SPWM drive circuit, MCU singlechip controller II, output short-circuit testing circuit and 5VUSB power interface.

3. described a kind of novel inverter according to claim 1; it is characterized in that: first, second, third of described MCU singlechip controller I connects respectively input overvoltage undervoltage detection circuit, overload protecting circuit, MCU singlechip controller II and temperature detection with the 4th input, and first and second the output of described MCU singlechip controller I respectively tap cooling blower and PWM is recommended control circuit.

4. described a kind of novel inverter according to claim 1 is characterized in that: first and second the input of described MCU singlechip controller II connects output short-circuit testing circuit and alternating voltage feedback.

5. described a kind of novel inverter according to claim 1 and 2, it is characterized in that: described SPWM drive circuit comprises 24 resistance R 1-R24,16 diode D1-D16,8 capacitor C 1-C8 and 4 voltage U 1-U4 parallel connection.

6. described a kind of novel inverter according to claim 1 and 2, it is characterized in that: described system supplymentary power supply comprises 9 resistance R 25-R33,15 capacitor C 9-C23,8 diode D17-D24,1 voltage U 5 and 1 inductance coil F1 parallel connection.

7. according to claim 1 or 3 described a kind of novel inverters, it is characterized in that: described MCU singlechip controller I comprises 7 resistance R 34-R40,11 capacitor C 24-C34,2 voltage U 6-U7 and 1 crystal oscillator X1 parallel connection.