JP2570019Y2 - Universal power input type transfer device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a new structure of the "universal power input type transfer device".
The present invention relates to a lightweight and convenient portable universal power input type transfer device for supplying DC power to a portable writing computer, a photographing machine, a hand-held tool, a vacuum cleaner, and the like.

[0002]

2. Description of the Related Art At present, science has developed and the wisdom of mankind has reached its maximum, and a small portable computer placed on the knee,
Writing-type computers, portable photographing machines, portable tools, etc.
It is born as a successor and provides convenient, sophisticated and useful equipment for human life, but these equipments are mostly small volume,
The emphasis is on portable, AC-free DC power supplies.

[0003] There are two methods for obtaining this type of DC power supply, one of which is by a battery and the other is by using the DC power supply of an automobile. It is necessary to emphasize the small volume of a battery using a battery, so that both the volume and the weight of the battery are required to be small. Therefore, the battery capacity is reduced, the usage time is short, and the battery must be replaced frequently. In addition, when a DC power supply of an automobile is used, it is often impossible to use the DC power supply because the required voltage differs depending on the device.

[0004]

[Problem to be solved by the present invention] The design principle of the "universal power input type transfer device" of the present invention is based on the solution of the above-described problem, and the DC voltage used by a hand-held computer, a stereo, a tool, etc. is different. Can be converted to the required DC voltage, and the input of AC electricity can be easily used.
It is another object of the present invention to provide a power transfer device capable of supplying alternating current or direct current as required.

[0005]

SUMMARY OF THE INVENTION A universal power input type transfer device according to the present invention comprises a three-terminal IE outlet which can be connected to an AC voltage, an AC / DC power sensing circuit, an AC / DC power selection circuit,
It is composed of an AC / DC power supply processing circuit, a DC power supply conversion circuit, a transfer adjustment circuit, and a DC output circuit.

The AC / DC power supply detection circuit obtains input power from a three-terminal IEC outlet and forms a charge / discharge circuit with transistors and capacitors, thereby detecting whether the power supply is DC or AC.

The AC / DC power supply selection circuit is mainly composed of two transistors and a relay.
By controlling the potential of the capacitor of the DC sensing circuit,
Turns on the transistor and excites the relay.

The AC / DC processing circuit inputs DC power directly into the DC power conversion circuit mainly by switching a relay contact in the AC / DC power selection circuit, and the power is converted to a DC voltage by an EMI prevention circuit and a rectifier circuit. It is converted and input to the DC power conversion circuit.

The DC power conversion circuit is a DC to AC converter (converter) mainly including two switching transistors and a transformer. The DC voltage receives one AC after the vibration of the switching transistor and the transformation of the transformer. The voltage is output to a DC output circuit.

The transfer adjustment circuit is mainly composed of one variable resistor,
Voltage stabilizer, optical coupling transistor,
It consists of an integrated circuit and outputs one reference voltage from a variable resistor, and the voltage stabilizer controls the output signal of the optical coupling transistor depending on whether or not this reference voltage is conducting. Then, by outputting this signal to the integrated circuit, the pulse wave width is changed and output to the switching transistor in the DC power conversion circuit to change the output voltage.

The DC output circuit converts the AC voltage generated by the DC power supply conversion circuit into a DC voltage through one rectifying and filtering circuit and outputs the DC voltage. Further, the DC output circuit generates one transfer voltage signal to provide a transfer and adjustment circuit. Put in.

[0012]

When the vehicle is connected to an IEC AC three-pronged outlet using a vehicle power supply, and the ordinary DC three-prong plug is used to introduce the vehicle DC power supply to the "universal power supply input-type transfer device", the internal circuit is processed. , Regardless of the input DC voltage, is converted and adjusted to all required DC voltages.

By doing so, it is possible to convert the input DC voltage using the universal power input type transfer device of the present invention, even if the DC voltage used by the handheld computer, the stereo, the tool, etc. is different. In addition, the universal power input type transfer device of the present invention has an AC input outlet, so that AC power can be easily input, and the AC power is input to the universal power input type transfer device. Then, it is converted into a necessary DC power supply by a conversion circuit, and supplies a voltage suitable for various facilities, and supplies AC or DC as necessary.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a first embodiment of the present invention;

As shown in FIG. 1 and FIG. 2, a universal power input type transfer device according to an embodiment of the present invention has a three-terminal IEC standard outlet 1, an AC / DC power sensing circuit 2, an AC / DC power selection circuit 3, It comprises an AC / DC processing circuit 4, a DC power supply conversion circuit 5, a transfer adjustment circuit 6, and a DC output circuit 7.

The three-terminal IEC standard outlet 1 can use a general three-prong plug for a computer to take in an AC voltage from the outside. You can also match the regular plug.

The AC / DC power supply detection circuit 2 uses the power supply frequency detection principle to detect whether the voltage mode of the immediately preceding input is DC or AC. When the input terminals L and N are DC, the capacitor CA1 is charged to a high potential and the transistors Q1 and Q2 are turned on. The relay 1 is energized, and the contacts a and f and c and g are energized.

When the input voltage is alternating current, the capacitor CA1 is charged at the time of the positive half-wave. However, since the time is short, the capacitor CA1 becomes insufficiently charged, so that it does not reach the stage where Q1 and Q2 are turned on and no excitation is performed. In the case of a negative half-wave, QA2 conducts and CA1 discharges. Therefore, in the case of an AC power supply, the relay does not operate, and the conduction of the contacts a and b and c and d is maintained.

The main feature of this circuit is that the power consumption of the DC power supply is extremely small, that is, 0.5 W or less, which can reduce the imaginary power loss in the circuit at the subsequent stage. Further, since each transistor of this circuit adopts a high-resistance design, the AC input voltage can be received in a range of 90 VAC-265 VAC and the DC voltage can be received in a range of 9 V-26 VDC.
Therefore, the circuit can be applied to any voltage of any market, home power supply or automobile power supply, has a flexible power supply sensitivity, and has extremely low power consumption.

The direct / AC power supply selection circuit 3 includes a transistor Q
1, Q2 and relay 1. The relay 1 is a relay with low power consumption, which can greatly reduce power loss in all circuits. Depending on whether the relay 1 is turned on by the transistors Q1 and Q2, the transistors Q1 and Q2 are connected to the CA of the preceding AC / DC power supply sensing circuit.
It is controlled by one potential.

The AC / DC processing circuit 4 includes an EMI prevention circuit L1.
And a rectifier circuit BO1. Input terminal L,
When N is AC, the contacts a and b and c and d are energized, and the AC voltage is converted into a DC voltage via the EMI prevention circuit L1 and the rectifier circuit BO1, and output. When the input terminals L and N are DC, the contacts a and f, c and g conduct, and the DC voltage is directly input to the DC power conversion circuit 5.

The DC power conversion circuit 5 includes switching transistors Q3 and Q4 and a transformer T1. The switching transistors Q3 and Q4 receive the pulse width adjustment PWN signal output from the transfer adjustment circuit 6, generate and output vibration, transform the voltage via the transformer T1, and output the voltage to the DC voltage output circuit 7.

The main feature of this circuit is that AC and DC share the same transformer T1, and under the same output load, different input voltages (at AC or DC input) maintain the same duty cycle, and cause poor vibration. Can be prevented from occurring.

The transfer adjusting circuit 6 includes a variable resistor VR for voltage adjustment.
1. Consists of a voltage stabilizer ICB1, an optical coupling transistor P2, and an integrated circuit IC1. The variable resistor VR1 adjusts the output of the DC voltage, and inputs the reference potential to the voltage stabilizer ICB1. If the reference potential is higher than the energizing voltage of the voltage stabilizer ICB1, the optical coupling transistor P1 operates, and the signal is output. It is sent to the integrated circuit IC1 to adjust its pulse wave output width.

This output pulse wave is output to the switching transistors Q3 and Q4 in a PWN system, and changes the opening and closing times of the transistors Q3 and Q4 to generate different oscillation voltage outputs, thereby adjusting the DC voltage output.

The DC output circuit 7 converts the AC voltage generated by the transformer T1 into a DC voltage output by a rectifying and filtering circuit.

FIGS. 3 and 4 show an embodiment of a vehicle power supply or a wall outlet connection according to the present invention. In the figure, A is a universal power input type transfer device of the present invention, B is an extension line, C1 is a transfer plug of a car lighter outlet and an IEC three-terminal outlet, and thereby the power source of the vehicle is used for the present invention. It can be connected to the power input type transfer device A. C2
Is a common wall-mounted AC outlet, which can provide AC power to the universal power input type transfer device A of the present invention.

[0028]

[Effects of the Invention] To summarize the above, since the input device of the present invention can be connected to a normal AC voltage, it can be said that it can be used in various countries around the world, and the range of the DC voltage that can be accepted is very large. It is also possible to input a voltage generated by various vehicles and a voltage of various storage batteries.

The processed DC voltage is of an adjustable type and can be adjusted and output up to 3 V to 24 V. Various portable DC operated electronic / electric devices, such as a knee-mounted type, a writing computer, and a portable type The range of use of CD stereos, photographing machines, tools, etc. is extremely wide, and is practical.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment according to the present invention.

FIG. 2 is a circuit diagram of an embodiment of the present invention.

FIG. 3 is a diagram showing a case where the embodiment of the present invention is connected to a vehicle power supply.

FIG. 4 is a diagram showing a case where the embodiment of the present invention is connected to a commercial power source.

[Explanation of symbols]

 1 3 terminal IEC standard outlet 2 AC / DC power sensing circuit 3 AC / DC power selection circuit 4 AC / DC processing circuit 5 DC power conversion circuit 6 times transfer adjustment circuit 7 DC output circuit

Claims (4)

(57) [Scope of request for utility model registration] An AC / DC power supply sensing circuit, an AC / DC power supply selection circuit,
This is a universal power input type transfer device composed of an AC / DC power supply processing circuit, a DC power supply conversion circuit, a transfer adjustment circuit, and a DC output circuit. The AC / DC power supply detection circuit is input from a three-terminal IEC outlet. A power charging / discharging circuit for acquiring power and detecting whether the power is direct current or alternating current by a transistor and a capacitor is configured. An alternating / direct current power supply selecting circuit includes two transistors and a relay. The control of the potential of the capacitor of the DC sensing circuit turns on the transistor and excites the relay. The power is input into the circuit, the power is converted to a DC voltage by the EMI prevention circuit and the rectifier circuit, and is input to the DC power conversion circuit. A DC-to-AC converter consisting of two switching transistors and a transformer. The DC voltage is subjected to the oscillation of the switching transistor and the transformer, and then outputs one AC voltage to the DC output circuit. The transfer adjustment circuit is composed of a variable resistor, a voltage stabilizer, an optical coupling transistor and an integrated circuit. The reference voltage is output from the variable resistor, and the voltage stabilizer determines whether or not the reference voltage is conducted by an optical coupling transistor. The output signal of the DC power conversion circuit is controlled by controlling the output signal of the DC power conversion circuit, and outputting this signal to the integrated circuit. The AC voltage passes through the rectifying and filtering circuit, is converted to a DC voltage, and is output. Power input type rolling contact device for Over 70, characterized in that to generate the pressure signal put in time Prof. adjustment circuit. 2. An AC / DC sensing circuit charges a capacitor with a DC voltage to generate a high potential, and the AC voltage cannot generate a high potential in the capacitor due to a short positive half-wave time. 2. The universal power input type transfer device according to claim 1, wherein a DC or AC power source is detected based on the potential state. 3. An AC / DC selection circuit for switching a voltage input point by a relay contact, not for switching a circuit by an electronic switch line, and the relay is a kind of low power consumption. The universal power input type transfer device according to claim 1, wherein the transfer device is a relay. 4. In a DC power conversion circuit, AC and DC share the same transformer, and the DC power conversion circuit maintains the same duty cycle under different output voltages under the same output load, 2. The universal power input type transfer device according to claim 1, wherein generation of vibration is prevented.