CN213938392U

CN213938392U - Single live wire power-taking circuit

Info

Publication number: CN213938392U
Application number: CN202022446504.XU
Authority: CN
Inventors: 吴彬
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-08-10
Anticipated expiration: 2030-10-29

Abstract

The utility model discloses a single live wire gets electric circuit, it includes: the transformer is provided with a primary coil and an output coil of a secondary side, the first end of the primary coil is connected with the power supply, the first end of the output coil is the output end of the transformer, the second end of the output coil is connected with the cathode of the second diode, and the anode of the second diode is grounded through the first capacitor; the circuit comprises a first resistor, a second resistor, a third resistor and a sixth resistor; a collector of the first triode is connected with the second end of the primary coil, a base of the first triode is connected with a power supply through a third resistor, a second resistor and a first resistor, and an emitter of the first triode is grounded through a sixth resistor; and the first feedback circuit is connected between the second end of the output coil and the base electrode of the first triode so as to feed back the voltage of the second end of the output coil to the base electrode of the first triode. The circuit controls the conduction time of the first triode through the voltage of the second end of the feedback output coil, and then the back-stage voltage is stabilized.

Description

Single live wire power-taking circuit

Technical Field

The utility model relates to an intelligence house field especially relates to a single live wire gets electric circuit.

Background

As is well known, electronic intelligent lighting switches consume certain electric energy when working normally, and in standby, the standby power taking of the single-live-wire intelligent switch supplies power to a control circuit of the switch through a tiny current flowing through a lamp. The magnitude of this minute current directly affects the operation of the intelligent switch. For example, if the standby input current is too small, the standby circuit may not work, and if the standby input current is too large, the electronic energy-saving lamp may be turned off and then may flash cold.

Therefore, single live wire intelligence switch all has a minimum power restriction problem, so single live wire gets the electric circuit and need satisfy no-load power consumption low, gets the advantage that the electric energy consumption is high, so how to design a more efficient single live wire and get the electric circuit vital.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a circuit is got to single live wire of efficient, this circuit is got to single live wire includes:

the transformer is provided with a primary coil and an output coil of a secondary side, the first end of the primary coil is connected with a power supply, the first end of the output coil is the output end of the transformer, the second end of the output coil is connected with the cathode of the second diode, and the anode of the second diode is grounded through the first capacitor;

the circuit comprises a first resistor, a second resistor, a third resistor and a sixth resistor;

a collector of the first triode is connected with the second end of the primary coil, a base of the first triode is connected with the power supply through the third resistor, the second resistor and the first resistor, and an emitter of the first triode is grounded through the sixth resistor; and

and the first feedback circuit is connected between the second end of the output coil and the base electrode of the first triode so as to feed back the voltage of the second end of the output coil to the base electrode of the first triode.

Preferably, the first feedback circuit includes a seventh resistor and an eighth resistor connected in series, a free end of the eighth resistor is connected to the second end of the output coil, and a free end of the seventh resistor is connected to the base of the first triode.

Preferably, the transformer further has a secondary auxiliary winding, a first end of which is connected to the second end of the output winding, and a second end of which is grounded.

Preferably, the single live wire power taking circuit further comprises a second feedback circuit, and the second feedback circuit comprises:

a fourth resistor;

a collector of the second triode is connected with the base electrode of the first triode, an emitter of the second triode is grounded through the sixth resistor, and the fourth resistor is connected between the base electrode and the emitter of the second triode in parallel; and

and the collector of the third triode is empty, the base of the third triode is connected with the base of the second triode, and the emitter of the third triode is connected with the first end of the output coil.

Preferably, the second feedback circuit further includes a fifth resistor, and an emitter of the third transistor is connected to the first end of the output coil through the fifth resistor.

Preferably, the reverse breakdown voltage between the base and the emitter of the third triode is 5V.

Preferably, the first feedback circuit further includes a zener diode, a cathode of the zener diode is connected to a connection end of the seventh resistor and the eighth resistor, and an anode of the zener diode is grounded through the first capacitor.

Preferably, the single live wire power supply circuit further includes:

the energy storage capacitor and the ninth resistor;

the anode of the first diode is connected with the first end of the output coil, and the cathode of the first diode is grounded through the energy storage capacitor;

the input end of the voltage detection delay output chip is connected with the first end of the output coil through the ninth resistor; and

and the source electrode of the controllable switching tube is connected with the cathode of the first diode, the grid electrode of the controllable switching tube is connected with the output end of the voltage detection delay output chip, and the drain electrode of the controllable switching tube is connected with a low-voltage direct-current power supply.

Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:

the utility model discloses a single live wire gets electric circuit includes transformer and output coil feedback circuit, and the conduction time of the first triode of voltage control of the second end through the output coil of feedback stabilizes the back voltage then, and this circuit structure design is simple, and output voltage is reliable and stable to no-load power dissipation is low, and it is very high to get the electrical efficiency, can satisfy the zigbee radio frequency module and make the lamps and lanterns more than 3W do not have the ghost condition of dodging under the normal power supply condition. In addition, the circuit can solve the problem that continuous large current is supplied under the condition that a zigbee module or a wifi module is in a distribution network state. Furthermore, the single-live-wire power taking circuit further comprises a secondary coil feedback circuit, the secondary coil feedback circuit and the output coil feedback circuit form a double-feedback circuit together, the double-feedback circuit jointly controls the conduction time of the first triode, and then the later-stage voltage is further stabilized.

Drawings

The scope of the present disclosure may be better understood by reading the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. Wherein the included drawings are:

fig. 1 shows the circuit schematic diagram of the single live wire power circuit of the embodiment of the present invention.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will be described in detail with reference to the accompanying drawings and embodiments, thereby to how to apply the technical means to solve the technical problem, and to achieve the technical effect of the realization process can be fully understood and implemented.

In prior art, single live wire intelligence switch all has a minimum power restriction problem, so single live wire gets the electric circuit and need satisfy no-load power consumption low, gets the advantage that the electric energy consumption is high, so how to design a section more efficient single live wire and get the electric circuit vital importance. Based on this, the embodiment of the utility model provides a single live wire gets electric circuit.

Fig. 1 shows the circuit schematic diagram of the single live wire power circuit of the embodiment of the present invention. As shown in fig. 1, the single-live-wire power-taking circuit of the embodiment includes a transformer T1, a first capacitor C1, a second diode D2, a first resistor R1, a second resistor R2, a third resistor R3, a sixth resistor R6, a first triode Q1, and a first feedback circuit.

The transformer T1 has a primary winding N_{1_2}And an output coil N of the secondary side_{4_5}. Primary coil N_{1_2}The first end 1 of the transformer is connected with a power supply, and an output coil N_{4_5}The first terminal 5 of the transformer T1, the output coil N_{4_5}Is connected to the cathode of a second diode D2, and the anode of the second diode D2 is connected to ground through a first capacitor C1.

The collector of the first triode Q1 is connected with the primary coil N_{1_2}The base of the first triode Q1 is connected to the power supply through the third resistor R3, the second resistor R2 and the first resistor R1, and the emitter of the first triode Q1 is grounded through the sixth resistor R6. Here, the power supply is a direct current rectified to DC300V by a rectifier bridge.

The first feedback circuit, also called output coil feedback circuit, is connected to the output coil N of the transformer T1_{4_5}Between the second terminal 4 and the base of the first transistor Q1 to couple the output coil N_{4_5}The voltage at the second terminal 4 is fed back to the base of the first transistor Q1. In particular, the first feedback circuit includes a seventh resistor R7 and an eighth resistor R8 connected in series with each other, and the free end of the eighth resistor R8 (i.e., the end not connected to the seventh resistor R7) is connected to the output coil N_{4_5}And the free end of the seventh resistor R7 (i.e., the end not connected to the eighth resistor R8) is connected to the base of the first transistor Q1. In a preferred embodiment of the present invention, the first feedback circuit further includes a zener diode D3, a cathode of the zener diode D3 is connected to a connection end of the seventh resistor R7 and the eighth resistor R8, and an anode is grounded through the first capacitor C1.

Here, the first feedback circuit functions as a primary feedback adjustment for outputting the coil N_{4_5}The voltage at the second terminal 4 is fed back to the base of the first transistor Q1.

The single live wire power supply circuit of the embodiment comprises a transformer T1 and an output coil feedback circuit, wherein an output coil N is fed back_{4_5}Of the second terminal 4The on-time of the first triode Q1 is controlled, the rear-stage voltage is stabilized, the circuit is simple in structural design, the output voltage is stable and reliable, no-load power consumption is low, the electricity taking efficiency is high, and the condition that the lamps with the power consumption of more than 3W are not subjected to ghost flash under the condition that the zigbee radio frequency module is normally powered can be met. In addition, the circuit can solve the problem that continuous large current is supplied under the condition that a zigbee module or a wifi module is in a distribution network state.

In a preferred embodiment of the present invention, the transformer T1 has an output winding N in addition to the secondary winding_{4_5}In addition, an auxiliary winding N with a secondary side_{3_4}Auxiliary coil N_{3_4}First end 4 of the transformer is connected with an output coil N_{4_5}Second end 4, auxiliary winding N_{3_4}And the second end 3 of the same is grounded. Auxiliary coil N_{3_4}Facilitates the construction of the second feedback circuit.

The utility model discloses an in a preferred embodiment, single live wire gets electric circuit and has the second feedback circuit who plays second grade feedback control effect in addition to having the first feedback circuit who plays one-level feedback control effect. Here, the second feedback circuit is also called a secondary side coil feedback circuit.

Still referring to fig. 1, the second feedback circuit includes a fourth resistor R4, a second transistor Q2, and a third transistor Q3.

The collector of the second triode Q2 is connected to the base of the first triode Q1, the emitter of the second triode Q2 is grounded through a sixth resistor R6, and the fourth resistor R4 is connected in parallel between the base and the emitter of the second triode Q2. The collector of the third triode Q3 is empty, the base of the third triode Q3 is connected with the base of the second triode Q2, and the emitter of the third triode Q3 is connected with the output coil N_{4_5}The first end of (a). Here, the base and the emitter of the third transistor Q3 are used as diodes for temperature compensation, which can effectively reduce the harm caused by temperature rise of the transistor in long-time operation.

The second feedback circuit connects the output winding N of the transformer T1_{4_5}Also fed back to the base of the first transistor Q1. The second feedback circuit and the first feedback circuit form a double feedback circuit. The base of the first transistor Q1 is shared by the double feedback circuitAnd (5) determining the same. The conduction time of the first triode Q1 is controlled by the double feedback circuit, so that the rear-stage voltage is further stabilized, the condition that the lamps above 3W are not subjected to ghost flashover under the condition that the zigbee radio frequency module is normally powered can be further ensured, and the condition that continuous large current is supplied under the condition that the zigbee or wifi module is in a distribution network state can be further solved.

In a preferred embodiment of the present invention, the second feedback circuit further includes a fifth resistor R5, and the emitter of the third transistor Q3 is connected to the first end of the output coil through the fifth resistor R5. In addition, the reverse breakdown voltage between the base and the emitter of the third transistor Q3 is 5V. Here, by the function of the current-limiting resistor, the fifth resistor R5, when the output voltage rises, the third transistor Q3 breaks down in the reverse direction to serve as the base input of the first transistor Q1 to limit the output voltage.

In a preferred embodiment of the present invention, the single live wire power-taking circuit further includes an energy storage capacitor CC1, a ninth resistor R9, a first diode D1, a voltage detection delay output chip VR2 and a controllable switch Q4.

The anode of the first diode D1 is connected to the output coil N_{4_5}The cathode of the first diode D1 is connected to ground via the storage capacitor CC 1. The input end of the voltage detection delay output chip VR2 is connected with the output coil N through a ninth resistor R9_{4_5}And a first end 5. The source electrode of the controllable switch tube Q4 is connected with the cathode of the first diode D1, the grid electrode of the controllable switch tube Q4 is connected with the output end of the voltage detection delay output chip VR2, and the drain electrode of the controllable switch tube Q4 is connected with a low-voltage direct-current power supply. Here, the low voltage dc power source is selected to be 6V dc.

Here, the voltage detection delay output chip VR2 detects the output winding N of the secondary side of the transformer T1_{4_5}Controls the closing of the controllable switching transistor Q4. Output coil N of single live wire power supply circuit_{4_5}The output voltage is fed back to the input end of the voltage detection delay output chip VR 2. When the voltage at the first end of the output coil (the output voltage of the transformer T1) is too low, the voltage detection delay output chip VR2 controls the controllable switch tube Q4 to be turned off, so that the output of the subsequent stage circuit is switched. After that, the time-delay equal-energy-storage capacitor CC1 is chargedThe full power controls the controllable switch tube Q4 to conduct again to supply power to the following circuit.

The single live wire power-taking circuit can autonomously control the conduction and the disconnection of the controllable switch tube Q4 according to the voltage of the first end of the output coil, and the normal work of the single live wire power-taking circuit is guaranteed.

Although the embodiments of the present invention have been disclosed, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be apparent to persons skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A single live wire gets electric circuit, its characterized in that includes:

2. The single live wire power taking circuit according to claim 1, wherein the first feedback circuit comprises a seventh resistor and an eighth resistor connected in series with each other, a free end of the eighth resistor is connected to the second end of the output coil, and a free end of the seventh resistor is connected to the base of the first triode.

3. The single live wire power taking circuit according to claim 2, wherein the transformer further comprises an auxiliary winding on the secondary side, a first end of the auxiliary winding is connected to the second end of the output winding, and a second end of the auxiliary winding is grounded.

4. The single live wire power taking circuit according to claim 3, further comprising a second feedback circuit, wherein the second feedback circuit comprises:

a fourth resistor;

5. The single live wire power taking circuit according to claim 4, wherein the second feedback circuit further comprises a fifth resistor, and an emitter of the third triode is connected to the first end of the output coil through the fifth resistor.

6. The single live wire power taking circuit according to claim 4, wherein a reverse breakdown voltage between the base and the emitter of the third transistor is 5V.

7. The single live wire power taking circuit according to claim 2, wherein the first feedback circuit further comprises a zener diode, a cathode of the zener diode is connected to a connection end of the seventh resistor and the eighth resistor, and an anode of the zener diode is grounded through the first capacitor.

8. The single live wire power taking circuit according to any one of claims 1 to 7, further comprising:

the energy storage capacitor and the ninth resistor;