SK8929Y1 - AC adapter with switch in electronic device - Google Patents

Abstract

The adapter is designed to convert AC to AC by a static converter in the form of a power adapter with a switch in an electronic device. It has a second contact (X2) of the connecting plug of the adapter (1) conductively connected to the first transformer input (TR) and the first contact (X1) of the adapter mains plug (1) conductively connected via a triac (T1) to the second transformer input (TR). The triac control electrode (T1) is connected in parallel through a second resistor (R2) to the second input of the transformer (TR) and simultaneously to the first optotriac output (OK1), the second output of which is connected in parallel via the first resistor (R1) in front of the triac (T1) to the first contact (X1) of the adapter power plug of the adapter (1).

Description

Technical field

The technical solution relates to a device for converting alternating current to alternating current by a static converter in the form of a mains adapter with a switch in an electronic device, in particular in consumer electronics products.

Prior art

The network adapter is divided into two main categories, t. j. depending on the current used, for DC type ..DC or AC type "A C".

A "AC" type mains adapter with a transformer and one or more output is generally known. In addition, the ..DC mains adapter uses an diode bridge to direct the current and to stabilize it, with an integrated circuit with auxiliary electronic components soldered either directly to each other (to minimize its dimensions) or to a printed circuit board. Both types of mains adapters are connected directly to the socket of a common electrical network by their mains plug, which is connected by wires to the primary inputs of the transformer. Such adapters make it possible to select one of several voltages set by the manufacturer for reversing the polarity of the voltage and to select one suitable from several possible connection connectors. Switching off the mains adapter is solved mainly by removing its mains plug from the mains socket or by a rarely demanding switch connected in series to the primary electrical circuit of its transformer, which is, however, impractical, as is frequent removal from the mains socket.

For these reasons, very often the mains adapters occur connected to a conventional electrical network in an unloaded state, while their output generates up to twice as much voltage, which is not stabilized, i. j. it changes depending on the connected load (appliance), which often leads to damage or complete destruction of the connected equipment and especially in case of poor quality of the adapters and their dangerous overheating and the possibility of fire.

According to patent JPH06292363 (A) a "AC" type mains adapter is known, the aim of which is to reduce the power consumption of the mains adapter from the AC input from the plug after it is converted to DC voltage instead of the battery when not in use and to prevent damage to its electrolytic capacitor. when AC power and the adapter is connected to a battery-powered device that operates with a built-in battery. The switch is selected on the mains adapter side and connected to the connector. When the device switch is switched on, the battery voltage supplies the relay via a diode and thus switches on the mains adapter. The output voltage of the adapter is slightly higher than the battery voltage, which supplies the DC voltage from the adapter to the device and at the same time supplies the relay via a diode. Then turning off the power switch turns off the relay and AC adapter.

As the previously mentioned technical solution is based on the operation of the relay, it has large dimensions, is expensive and has increased electricity consumption during the operation of the electrical appliance. In addition, when the mains voltage drops out due to the operation of the electrical appliance, its battery is rapidly discharged, while during its recharging to a suitable capacity for the operation of the mains adapter, it and the electrical appliance are undesirably deactivated.

The essence of the technical solution

These shortcomings are largely eliminated by a mains adapter with a switch in an electronic device, consisting of a connecting mains plug, a transformer, an optotriac, a triac, resistors, capacitors, diodes, wires, a battery and an electrical appliance. The essence of the technical solution is that the second contact of the connecting mains plug of the adapter is conductively connected to the first input of the transformer and the first contact of the connecting mains plug of the adapter is conductively connected via a triac to the long input of the transformer. The control electrode of the triac is connected in parallel via a second resistor to the second input of the transformer and at the same time to the first output of the optotriac, the second output of which is connected in parallel before the triac to the first contact of the connecting mains plug of the adapter. At the same time, the long input of the optotriac is connected by wires to the first output of the transformer and the first input of the optotriac is connected to the electronic device in parallel via a third resistor by a switch wire and a first transformer output via a fourth resistor, the intermediate output and the first capacitor device in which a battery with a short-circuit connected in parallel and a switch is connected between the switch conductor and the first supply conductor via a switch

It is advantageous if the switch and the circuit-breaker form a double two-position switch connected on one side via a second capacitor between the first supply conductor and the switch conductor, the first outputs of which are connected via a sixth resistive battery and the long outputs interconnected via a second diode.

S K 8929 Υ1

The technical solution enables long-term connection of the adapter to the power supply network when the primary input of the transformer is open, its simple practical switching on by a switch or switch and switching off by a switch or switch in the electrical appliance. At the same time, it only minimally loads the battery located in the electrical appliance for a short time, which therefore has a long service life. The mains adapter uses small electrical components, which allow the minimization of its dimensions at low cost and only minimally increased electricity consumption during the operation of the appliance.

Overview of figures in the drawings

In FIG. 1 shows a circuit diagram of a network adapter with a switch in an electronic device formed by a switch and a switch of a connected electronic device according to the technical solution, and FIG. 2 is a circuit diagram of an alternative switch of a mains adapter formed by a double two-position switch according to the technical solution.

Examples of embodiments

The enclosed wiring diagrams of the mains adapter with a switch in the connected electronic device show and explain the subject of the technical figures, where in fig. 1 shows an example of the connection of a network adapter 1 with a switch in the electronic device 2 formed by a switch 5 and a switch 8 of the electronic device 2 according to the technical solution. From FIG. 1 shows that the contact X2 of the connecting mains plug of the adapter 1 is conductively connected to the first input of the transformer TR and the first contact XI of the connecting mains plug of the adapter 1 is conductively connected to the second input of the transformer TR The triac control electrode TI is connected in parallel via a second resistor R2 to the second input of the transformer TR and at the same time to the first output of the optotriac OK, the second output of which is connected in parallel via the first resistor R1 in front of the triac TI to the first contact XI of the connecting network plug of the adapter 1. At the same time the second input of the optotriac OK is connected to the first output of the transformer TR the first input of the optotriac OK is connected via a third resistor R3 by a switch wire 3 - in parallel to the electronic device 2 and via a fourth resistor R4 and a first capacitor C1 with a first output of the transformer TR. Between the fourth resistor R4 and the first capacitor C1, a second output of the transformer TR is connected in parallel via the fifth resistor R5 and the first diode D1 to the electronic device 2, in which a battery 7, e.g. type + 3V- type CR2032 etc., with short-circuit circuit connected in parallel and switch 8.

In the starting position, t. j. with the mains adapter 1 not connected to the mains or at rest after connecting its current plug to the mains, the triac TI and the optotriac OK are open, the mains adapter 1 has zero power consumption and no voltage occurs on the secondary of the transformer TR. Prior to activation, the mains adapter 1 is connected to the electronic device 2 by means of a switch wire 3, a first power supply wire 4 and a second power supply wire 5, and is subsequently switched on with the electronic device 2, e.g. presses, switch 6 (START), and for a short time from the positive pole of the battery 7, electric current flows through the second diode D2, the button TL2 to the LED of the optotriac OK and back to the minus pole of the battery 7, causing the optotriac OK and subsequently the triac T2 to close. In this way, the primary winding of the transformer TR is connected to the mains and an electric current begins to flow through it. An electrical voltage is generated at the secondary of the transformer TR and the optotriac OK is "held" in the closed state via the first diode D1, the fifth resistor R5, the fourth resistor R4, the third resistor R3 and the first capacitor C1 until the switch 8 (STOP buttons) is pressed. in electronic device 2. When switch 8 (STOP button) is pressed, current stops flowing to the LED in the optotriac OK and the voltage on the first capacitor C1 and the fourth resistor R4 is shortened, the optotriac OK and the triac TI stop conducting current, thereby the supply to the primers of the transformer TR is interrupted and the whole circuit returns to the initial state with zero current consumption.

In FIG. 2 shows an alternative example of the switching circuit of the network adapter 1 shown in FIG. 1, with a switch in an electronic device, where its switch and circuit breaker form a double two-position switch 9 connected on one side via a second capacitor C2 between the first supply conductor 4 and the switch conductor 3, the first outputs of which are connected via a sixth resistor R6 to the battery 6 and the second outputs interconnected via a second diode D2.

In this case, it is also in the starting position, i. j. when the mains adapter 1 is not connected to the mains or at rest after connecting its current plug to the mains, the triac TI and the optotriac OK are open, the mains adapter 1 has zero power consumption and no voltage occurs on the secondary of the transformer TR. Prior to operation, the mains adapter 1 is connected to the electronic device 2 in which the mains cable 3, the first power cable 4 and the second power cable 5 are connected.

S K 8929 Υ1 fitted double two-position switch 9 in OFF position. Subsequently, the two-position switch 9 is switched (set to the ON position) in the electronic device 2 and for a short time from the positive pole of the capacitor C2 an electric current flows through the diode D3 and the third resistor R3 to the LED diode of the optotriac OK and back to the negative pole of the capacitor C2. optotriac OK and subsequently also triac T2. In this way, the primary winding of the transformer TR is connected to the mains and an electric current begins to flow through it. An electric voltage is generated on the secondary of the transformer TR and via the first diode D1, the fifth resistor R5, the fourth resistor R4, the third resistor R3 and the first capacitor C1 will be "held" by the optotriac OK in the ON state until the two-position switch 9 switches to the OFF position. ) in the electronic device 2. After switching the two-position switch 9 (to the OFF position), current stops flowing to the LED in the optotriac OK and the voltage on the first capacitor C1 and the fourth resistor R4 is shorted through the contacts of switch 9, while the optotriac OK and triac TI stop electric current, which interrupts the supply to the primers of the transformer TR and the whole circuit returns to the initial state with zero electric current consumption

Industrial applicability

The mains adapter with a switch in an electronic device is advantageous to use in particular in devices requiring a higher power consumption for their operation, where zero consumption of electricity at rest is required or where it is inappropriate to use switched adapters producing interfering voltages. From electronic devices it can also be used for common consumer electronics products, e.g. in video format players (DVD, VHS, Blu-ray, etc.), audio players (MP3, CD, minidisc), turntables, tape recorders, radios and other sound equipment (speaker systems and sound systems), office electronics, etc.

Claims (2)

CLAIMS FOR PROTECTION A mains adapter with a switch in an electronic device, consisting of a mains plug, a transformer, an optotriac, a triac, resistors, capacitors, diodes, conductors, a battery and an electrical appliance, characterized in that the second contact (X2) of the mains plug of the adapter (1) ) is conductively connected to the first input of the transformer (TR) and the first contact (XI) of the connecting mains plug of the adapter (1) is conductively connected to the second input of the transformer (TR), the triac control electrode (TI) being connected in parallel via a second resistor (R2) to the second input of the transformer (TR) and at the same time to the first output of the optotriac (OK), the second output of which is connected in parallel via the first resistor (R1) before the triac (TI) to the first contact (XI) of the adapter's mains plug ( 1), wherein the second optotriac input (OK) is connected by wires to the first transformer output (TR) and the first optotriac input (OK) is connected in parallel with the electronic device (2) via a third resistor (R3) by a switch wire (3) and via a a drilling resistor (R4) and a first capacitor (C1) with a first transformer output (TR), a second transformer output being connected in parallel via a fifth resistor (R5) and a first diode (D1) between the fourth resistor (R4) and the first capacitor (C1) (TR) to an electronic device (2), in which a battery (7) with a short-circuit connected in parallel and a switch (8) is connected between the switch conductor (3) and the first supply conductor (4) via a switch (6). Mains adapter with a switch in an electronic device according to claim 1, characterized in that the switch and the switch form a double two-position switch (9) connected on one side via a second capacitor (C2) between the first supply conductor (4) and the switch conductor (3). ), the first outputs of which are connected via a sixth resistor (R6) to the battery (δ) and the second outputs are interconnected via a second diode (D3).