CN2423672Y

CN2423672Y - High-frequency charger

Info

Publication number: CN2423672Y
Application number: CN 00217433
Authority: CN
Inventors: 周会
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-24
Filing date: 2000-04-24
Publication date: 2001-03-14
Anticipated expiration: 2010-04-24

Abstract

The utility model relates to a high-frequency charger, which comprises a primary rectification circuit (1), a switch converting circuit (2), a secondary rectification circuit (3), a sampling and comparing amplification circuit (4), and an oscillating circuit (5). The utility model is characterized in that a current limiting and sampling circuit is additionally arranged between the secondary rectification circuit and DC output; a current limiting and sampling resistor of the current limiting and sampling circuit is connected with a comparing amplification circuit (6); the output of the comparing amplification circuit (6) is connected with a driver circuit (7); a relay coil J with a relay type switch is used as the load of the drive circuit (7), and two switches of the relay coil J are respectively used as the entry switch K1 of AC Power and the output switch K2 of DC power. The utility model has the advantage that when a battery is fully charged, or the load of the battery is broken, or the commercial power is switched off, the utility model can automatically switch off the input power and the output power.

Description

High-frequency charger

The utility model relates to charging technique, relates in particular to high-frequency charger, is used for the charging of storage batterys such as car, ship, also can be used as DC power supply.

The charger of car, ship storage battery is made up of than amplifying circuit, oscillating circuit rectifying and wave-filtering, switch transformed circuit, secondary rectification circuit, a sampling rate at present, its weak point is: storage battery is full of, load disconnection, the left alone without help electricity of civil power, can not automatically shut down the input power supply and cut off out-put supply.

The purpose of this utility model is to avoid above-mentioned weak point and provides storage battery to be full of or can cut off the high-frequency charger of input power supply and out-put supply during the left alone without help electricity of load disconnection or civil power automatically.

The purpose of this utility model can reach by following technical solution: comprise current rectifying and wave filtering circuit one time, switch transformed circuit, the secondary rectifying and wave-filtering, sampling rate is than amplifying circuit, oscillating circuit, once the output of whole filter circuit connects the input of switch transformed circuit, switch transformed circuit connects secondary rectification circuit, secondary rectification circuit connects sampling rate than amplifying circuit, sampling rate connects oscillating circuit than amplifying circuit, oscillating circuit connects switch transformed circuit, in addition, between secondary rectification circuit and direct current output, set up the current limliting sample circuit, the current limliting sample resistance R of current limliting sample circuit ₂₈Connect relatively amplifying circuit, relatively the output of amplifying circuit connects drive circuit, and the relay coil J of tape relay formula switch is as the load of drive circuit, and two switch is respectively as the input switch K of AC power ₁, the output K switch of DC power supply ₂

The utility model advantage: storage battery is full of, civil power cuts off the power supply, when load disconnects, can cut off the input and output power supply automatically.

Below in conjunction with drawings and Examples the utility model is described in detail:

Accompanying drawing 1 is the electric functional-block diagram of the utility model charger.

Accompanying drawing 2 is the utility model charger circuit schematic diagrams.

As shown in Figure 1, 2, AC power input switch K ₁And by piezo-resistance R ₁Inductance coil l with a current rectifying and wave filtering circuit 1 ₁Connect, a current rectifying and wave filtering circuit 1 is by inductance L, capacitor C ₁, full-wave rectification D ₁-D ₄, filter capacitor C ₂Form transformer T ₁Winding l ₁, switching tube Q ₁Resistance R ₆Be in series and connect a current rectifying and wave filtering circuit 1 and export diode D ₅, winding l ₂Be composed in series Q ₂Reverse-voltage protection, by winding l ₃, diode Q ₂, inductance L ₂, capacitor C _9-10Form secondary rectifying and wave-filtering 3, by direct current output K switch ₂, current limliting sample resistance R ₂₈Output DC source, sampling rate than amplifying circuit 4 by potentiometer W ₁, resistance R ₁₁, R ₁₂, R ₁₃, capacitor C ₁₂, voltage reference tube Q ₆Form resistance R ₁₄, optocoupler pipe Q ₃Connect the ic chip of oscillating circuit 5 with oscillating circuit 5 ₁ Be 3845, voltage stabilizing didoe D ₇, triode Q ₇, resistance R ₁₅, R ₁₆, capacitor C ₁₁Forming overvoltage protection, more than is prior art.In order to reach the purpose of this utility model, serial connection current limliting sample resistance R on the output line of secondary current rectifying and wave filtering circuit 3 ₂₈, R ₂₈Connect relatively amplifying circuit 6, relatively amplifying circuit 6 connects drive circuit 7, and relatively amplifying circuit 6 is by ic chip ₂, potentiometer W ₂, diode D ₉, resistance R ₉, R ₁₀, R ₁₉, capacitor C ₁₄Form ic chip ₂Be 324 integrated packages, this integrated package has four groups of A, B, C, D, says and adopts B group, current limliting sample resistance R ₂₈Pass through resistance R ₉Pin 6 with the B group connects potentiometer W ₂, R ₁₀, R ₁₈The DC power supply output of the secondary of serial connection, and connection mutually current rectifying and wave filtering circuit 3, it becomes the pin 5 of resistance end connection B group, diode D ₉Connect the pin 7 of B group, and pass through resistance R ₂₀The triode Q that connects drive circuit 7 ₄, triode Q ₄, tape relay formula switch relay coil J, protection switch K ₃Series connection, and the DC power supply output of connection secondary current rectifying and wave filtering circuit 3.

During work, hand pushing switch makes K ₁, K ₂Closure, buck switch K ₃, make K ₃Closure, the alternating current 220V civil power is through K switch ₁, resistance R ₁Import one time current rectifying and wave filtering circuit 1, direct current one tunnel input transformation T behind a rectifying and wave-filtering ₃Primary coil l ₁, lead up to starting resistance R ₂Pin 7 with oscillator integrated package 3845 connects, and makes IC ₁Produce the higher-order of oscillation, through IC ₁3845 pin, 6 output high-frequency signals are to Q ₁, make Q ₁Work, driving transformer T ₃Work makes transformer T ₃The output relevant voltage obtains DC power supply through the secondary rectifying and wave-filtering, obtains error signal than amplifying circuit 4 from this DC power supply by sampling rate, and error signal is by Q ₃Feed back to IC ₂On the high-frequency oscillating circuits, cause DC power supply output stable, direct current is exported an end by the output K switch ₂, K ₂One end is by current limliting sample resistance R ₂₈And export R ₂₈Connect relatively amplifying circuit 5 again, relatively R is passed through in the output of amplifying circuit 5 ₂₀The Q that connects drive circuit 7 ₄, the work of pull switch relay: when storage battery is full of, R ₂₈Produce relevant voltage at IC ₂Pin 6 on, make IC ₂Pin 6 current potentials are less than IC ₂Pin 5 on current potential, make IC ₂Pin 7 output high potentials make D ₉Conducting, thus make Q ₄Conducting, switch relay J work, shutoff input power supply and out-put supply K switch ₁, K ₂When load disconnection or the left alone without help electricity of civil power, at R ₂₈Do not produce current potential, make IC ₂Pin 5 current potentials greater than IC ₂₆The pin current potential makes IC ₂₇Pin output high potential makes D ₉Conducting causes Q ₄Conducting, input power supply, out-put supply K switch are turn-offed in switch relay work ₁, K ₂If adopt IC simultaneously ₂A, C group can form temperature protection circuit and current foldback circuit, temperature protection circuit is by temperature sampling circuit 8, relatively amplifying circuit 9, blower fan drive circuit 10 are formed, current foldback circuit is by IC ₂A group, diode D ₈Form.M is a blower fan.

Claims

1, a kind of high-frequency charger, comprise a current rectifying and wave filtering circuit (1), switch transformed circuit (2), secondary rectifying and wave-filtering (3), sampling rate is than amplifying circuit (4), oscillating circuit (5), once the output of whole filter circuit (1) connects the input of switch transformed circuit (2), switch transformed circuit (2) connects secondary rectification circuit (3), secondary rectification circuit (3) connects sampling rate than amplifying circuit (4), sampling rate connects oscillating circuit (5) than amplifying circuit (4), oscillating circuit (5) connects switch transformed circuit (2), it is characterized in that: between secondary rectification circuit and direct current output, set up the current limliting sample circuit, the current limliting sample resistance R of current limliting sample circuit ₂₈Connect relatively amplifying circuit (6), relatively the output of amplifying circuit (6) connects drive circuit (7), and the relay coil J of tape relay formula switch is as the load of drive circuit (7), and two switch is respectively as the input switch K of AC power ₁, the output K switch of DC power supply ₂

2, by the described high-frequency charger of claim 1, it is characterized in that: relatively amplifying circuit (5) is by ic chip ₂, potentiometer W ₂, diode D ₉Form current limliting sample resistance R ₂₈Connect 324 ic chips ₂B organizes pin 6, potentiometer W ₂The series connection dropping resistor connects the DC power supply output of secondary rectifying and wave-filtering, and it becomes the pin 5 that the resistance end connects the B group, diode D ₉The pin 7 that connects the B group, and the triode Q of connection drive circuit (7) ₄, triode Q ₄, tape relay formula switch coil J, protection switch K ₃Series connection, and the DC power supply two ends of connection secondary rectifying and wave-filtering.