CN202798471U

CN202798471U - 15V laminated cell substitution circuit

Info

Publication number: CN202798471U
Application number: CN 201220529402
Authority: CN
Inventors: 黄勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-10-16
Filing date: 2012-10-16
Publication date: 2013-03-13
Anticipated expiration: 2022-10-16

Abstract

The utility model discloses a 15V laminated cell substitution circuit which is characterized in that the circuit includes a 1.5V cell, a transformer feed-back oscillating circuit, a boost circuit, and a rectifying and filtering voltage stabilizing circuit. The 9V or 15V laminated cell is widely applied to the pointer multimeter, the digital capacitance meter, and other instruments, for example, the pointer multimeter usually uses the laminated cell when measuring a high resistance circuit. The service lifetime of the laminated cell is very short, so the laminated cell is uneconomical because of the frequent replacement. The laminated cell is high in price, and is not easy to purchase in the market sometimes. The 15V laminated cell substitution circuit boosts the voltage from 1.5V to 15V to replace the laminated cell.

Description

15V laminated cell replacement circuit

Technical field

The utility model belongs to electronic technology and DC boosting technical field, is about a kind of 15V laminated cell replacement circuit.

Background technology

The laminated cell of 9V or 15V has widely purposes in instrument such as pointer multimeter, digital capacitance meters, as: mostly use a laminated cell in the circuit that pointer multimeter measuring resistance height stops, the useful life of this laminated cell is short especially, often change really uneconomical, this laminated cell not only price is higher, and sometimes be difficult for having bought in market, 15V laminated cell replacement circuit described in the utility model can rise to 1.5V voltage 15V and be used for replacing laminated cell.

Below describe this 15V laminated cell replacement circuit related relevant technologies content in implementation process in detail.

The utility model content

The laminated cell of goal of the invention and beneficial effect: 9V or 15V has widely purposes in instrument such as pointer multimeter, digital capacitance meters, as: mostly use a laminated cell in the circuit that pointer multimeter measuring resistance height stops, the useful life of this laminated cell is short especially, often change really uneconomical, this laminated cell not only price is higher, and sometimes be difficult for having bought in market, 15V laminated cell replacement circuit described in the utility model can rise to 1.5V voltage 15V and be used for replacing laminated cell.

The circuit working principle: 15V laminated cell replacement circuit is comprised of components and parts such as positive-negative-positive triode VT1, step-up transformer T, Schottky diode D1, electrochemical capacitor C1, current-limiting resistance R1, voltage stabilizing didoe DW and 1.5V batteries.Positive-negative-positive triode VT1 and step-up transformer T consist of transformer feedback formula oscillating circuit, and when the 15V output had load current to pass through, the base stage of positive-negative-positive triode VT1 just had electric current to pass through, and circuit gets final product oscillatory work; Otherwise positive-negative-positive triode VT1 does not have base current, and battery does not consume electric energy yet, so this circuit does not need to arrange mains switch.After boosting by step-up transformer T, by obtaining after Schottky diode D1 halfwave rectifier and the electrochemical capacitor C1 filtering 〉=direct current of 17V, through obtaining 15V stable DC voltage after current-limiting resistance R1 and the voltage stabilizing didoe DW voltage stabilizing, this 15V stable DC voltage can directly replace the 15V laminated cell.

Technical characterictic: 15V laminated cell replacement circuit, it is comprised of 1.5V battery, transformer feedback formula oscillating circuit, booster circuit and rectification filtering voltage stabilizing circuit, and its feature comprises:

Transformer feedback formula oscillating circuit: it is comprised of the primary coil L1 of positive-negative-positive triode VT1, step-up transformer T, the emitter of positive-negative-positive triode VT1 meets the anodal VCC of 1.5V battery, the collector electrode of positive-negative-positive triode VT1 connects primary coil L1 one end of step-up transformer T, the primary coil L1 other end connection circuit ground GND of step-up transformer T;

Booster circuit and rectification filtering voltage stabilizing circuit: it is by the secondary coil L2 of step-up transformer T, Schottky diode D1, electrochemical capacitor C1, resistance R 1, voltage stabilizing didoe DW becomes with 15V DC output end subgroup, the base stage of the secondary coil L2 one termination positive-negative-positive triode VT1 of step-up transformer T, the positive pole of another termination Schottky diode of the secondary coil L2 of step-up transformer T D1, the negative pole of Schottky diode D1 connects the positive pole of electrochemical capacitor C1 and an end of resistance R 1, the negative pole of another termination voltage stabilizing didoe DW of resistance R 1 and 15V direct current cathode output end, the positive pole of the negative pole of electrochemical capacitor C1 and voltage stabilizing didoe DW connects 15V direct current cathode output end.

1.5V the negative pole of battery links to each other with circuit ground GND and 15V direct current cathode output end.

Description of drawings

Accompanying drawing 1 is the embodiment circuit working schematic diagram that the utility model provides a 15V laminated cell replacement circuit; The negative pole of 1.5V battery links to each other with circuit ground GND in the accompanying drawing 1.

Embodiment

Fundamental diagram and description of drawings according to the replacement of 15V laminated cell shown in the accompanying drawing 1 circuit, and according to the annexation between the components and parts in the described circuit of utility model content, and the components and parts technical parameter described in the execution mode and requirement are implemented to realize the utility model.

The selection of components and parts and technical parameter

The utility model embodiment boosts the 15V direct current as example take the 1.5V battery:

VT1 is the positive-negative-positive low-power transistor, and the model of selecting is 2N3906, requires β 〉=200;

D1 is Schottky diode, the operating voltage 〉=25V that selects;

C1 is electrochemical capacitor, and its capacity is 4.7 μ F/25V;

R1 is resistance, and its resistance is 1.8～2.2K Ω;

DW is voltage stabilizing didoe, and technical parameter is 15V;

1.5V No. 2 manganese-zinc batteries of the used single-unit of battery.

Making main points and the circuit debugging of circuit

1. the making of step-up transformer T: adopt ￠ 12mm magnet ring as skeleton, armature winding L1 selects ￠ 0.15mm enamelled wire to wear around 16 circles, and secondary winding L2 wears around 240 circles with ￠ 0.08mm enamelled wire;

2. at first connect the resistance of 1 3K Ω as dummy load at voltage output end, in order to make the circuit can starting of oscillation work, measure the direct voltage at electrochemical capacitor C1 two ends with the universal instrument shelves of direct voltage, observe to detect and to boost output voltage whether about 18V, only have about 5V such as output voltage, the two ends of any winding of step-up transformer T can be exchanged and try again it;

3. voltage regulation result will be affected on voltage between the circuit ground GND less than 17V when Schottky diode D1 negative pole, the resistance of resistance R 1 can be suitably reduced, or at electrochemical capacitor C1 two ends and connect the electrochemical capacitor of 1 same capability; Output valve is still on the low side if boost, and can suitably increase the number of turn of step-up transformer T secondary coil L2.

Claims

1. 15V laminated cell replacement circuit, it is comprised of 1.5V battery, transformer feedback formula oscillating circuit, booster circuit and rectification filtering voltage stabilizing circuit, and its feature comprises:

Described transformer feedback formula oscillating circuit is comprised of the primary coil L1 of positive-negative-positive triode VT1, step-up transformer T, the emitter of positive-negative-positive triode VT1 meets the anodal VCC of 1.5V battery, the collector electrode of positive-negative-positive triode VT1 connects primary coil L1 one end of step-up transformer T, the primary coil L1 other end connection circuit ground GND of step-up transformer T;

Described booster circuit and rectification filtering voltage stabilizing circuit are by the secondary coil L2 of step-up transformer T, Schottky diode D1, electrochemical capacitor C1, resistance R 1, voltage stabilizing didoe DW becomes with 15V DC output end subgroup, the base stage of the secondary coil L2 one termination positive-negative-positive triode VT1 of step-up transformer T, the positive pole of another termination Schottky diode of the secondary coil L2 of step-up transformer T D1, the negative pole of Schottky diode D1 connects the positive pole of electrochemical capacitor C1 and an end of resistance R 1, the negative pole of another termination voltage stabilizing didoe DW of resistance R 1 and 15V direct current cathode output end, the positive pole of the negative pole of electrochemical capacitor C1 and voltage stabilizing didoe DW connects 15V direct current cathode output end.

2. 15V laminated cell according to claim 1 replacement circuit is characterized in that: the negative pole of 1.5V battery is with circuit ground GND and 15V direct current cathode output end is sub links to each other.