CN216929590U

CN216929590U - Two-wire power supply control circuit with variable direct-current voltage

Info

Publication number: CN216929590U
Application number: CN202123167421.8U
Authority: CN
Inventors: 袁皓; 胡逢康
Original assignee: Electronic Power Technology Shanghai Co ltd
Current assignee: Electronic Power Technology Shanghai Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-07-08
Anticipated expiration: 2031-12-16

Abstract

A variable dc voltage two-wire supply control circuit comprising: the direct-current voltage input voltage adjustable module is connected with a switch power supply trimmable output voltage, the direct-current voltage input voltage adjustable module is connected with an input reverse connection prevention circuit, the input reverse connection prevention circuit is connected with the signal acquisition shaping module and an output adjustable power circuit, the signal acquisition shaping module is connected with the dimming control signal module, the dimming control signal module is connected with the output adjustable power circuit, and the output adjustable power circuit is connected with the lamp panel. Compared with the prior art, the utility model adopts the two-wire dimming control circuit module, so that dimming signals are not interfered by a power grid, dimming can be carried out in a full range of 0-100%, independent dimming is not needed, and the installation and wiring are convenient.

Description

Two-wire power supply control circuit with variable direct-current voltage

Technical Field

The utility model relates to the technical field of electronic circuits, in particular to a variable direct-current voltage two-wire power supply control circuit.

Background

Conventional dimming typically has a 4-wire input and a 1-wire input. The 4-wire input dimming means that 1 power line and 1 dimming line can be added with a variable direct current level generally, the level of the common dimming line is from low to high, the current output of an LED power supply is from zero to rated output, namely, an LED lamp is from full dark to full bright, or a pulse signal is added to the dimming line, the duty ratio of the common dimming signal is from 0% to 100%, and the current output of the LED power supply is from zero to rated output, namely, the LED lamp is from full dark to full bright. However, the need to add 1 dimming line is inconvenient for users in practical use.

1-line input dimming means that 1 power line is also used as dimming line, and most of the dimming lines are dimming by additionally arranging a silicon controlled dimmer in front of an LED power input end. The basic principle is that part or all of the power frequency waveform of the input end power grid is cut off by the controllable silicon, the rectified average value of the waveform is correspondingly reduced, and the post-stage dimming circuit acquires the variable to adjust the corresponding output current. Generally, the current output of the LED power supply is from zero to the rated output, namely the LED lamp is from full dark to full bright through the size (zero) of the cut angle of the silicon controlled rectifier. From this kind of mode of adjusting luminance, can directly extinguish when adjusting luminance to 30%, because cut off 70% power frequency wave, its operating voltage drops too much after the rectification so that the main circuit can't maintain normal operating condition and stop work. When the electronic ballast is started, the silicon controlled dimmer is required to be adjusted to 40% firstly, otherwise, the circuit can not be started in the mode of the hard cut angle, so that the electromagnetic interference is multiplied in the dimming state.

In the other scheme, the ECHELON loads dimming information on a power line in a high-frequency pulse train, reads the dimming information through a special LED power supply, and adjusts the output current correspondingly, so that the dimming information is easily interfered by an external power grid.

In order to solve the above problems, we have made a series of improvements.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a two-wire power supply control circuit with variable dc voltage to overcome the above-mentioned disadvantages and shortcomings of the prior art.

A variable dc voltage two-wire power supply control circuit comprising: the adjustable module of direct current voltage input voltage, input prevent reverse connection circuit, signal acquisition plastic module, dimming control signal module and output adjustable power circuit, the adjustable module of direct current voltage input voltage can finely tune output voltage with switching power supply and be connected, the adjustable module of direct current voltage input voltage prevents reverse connection circuit with the input and is connected, input prevent reverse connection circuit and signal acquisition plastic module and output adjustable power circuit connection, signal acquisition plastic module is connected with dimming control signal module, dimming control signal module and output adjustable power circuit connection, output adjustable power circuit is connected with the lamp plate.

Further, the signal of the dimming control signal module is a pulse width modulation dimming signal with an adjustable duty ratio of 0-100% or a direct current level dimming signal with an adjustable direct current of 0-10 v.

The utility model has the beneficial effects that:

compared with the prior art, the utility model adopts the two-wire dimming control circuit module, the dimming signal is not interfered by a power grid, the full-range dimming can be carried out within 0-100 percent, independent dimming is not needed, and the installation and wiring are convenient.

Description of the drawings:

FIG. 1 is a logic diagram of the present invention.

Fig. 2 is a logic block diagram of 4-wire input dimming.

Fig. 3 is a logic block diagram of 1-wire input dimming.

Fig. 4 is a logic block diagram of ECHELON dimming.

Reference numerals:

the switching power supply can finely adjust the output voltage 1 and the lamp panel 3.

The direct-current voltage input-voltage adjustable circuit comprises a direct-current voltage input-voltage adjustable module 100, an input anti-reverse connection circuit 200, a signal acquisition shaping module 300, a dimming control signal module 400 and an output adjustable power circuit 500.

Detailed Description

The present invention will be further described with reference to the following examples. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.

Example 1

FIG. 1 is a logic diagram of the present invention. Fig. 2 is a logic block for 4-wire input dimming.

Fig. 3 is a logic block diagram of 1-wire input dimming. Fig. 4 is a logic block diagram of ECHELON dimming.

As shown in fig. 1, a variable dc voltage two-wire power supply control circuit includes: the direct-current voltage input voltage adjustable module 100, the input anti-reverse connection circuit 200, the signal acquisition shaping module 300, the dimming control signal module 400 and the output adjustable power circuit 500, the direct-current voltage input voltage adjustable module 100 is connected with the switch power supply trimmable output voltage 1, the direct-current voltage input voltage adjustable module 100 is connected with the input anti-reverse connection circuit 200, the input anti-reverse connection circuit 200 is connected with the signal acquisition shaping module 300 and the output adjustable power circuit 500, the signal acquisition shaping module 300 is connected with the dimming control signal module 400, the dimming control signal module 400 is connected with the output adjustable power circuit 500, and the output adjustable power circuit 500 is connected with the lamp panel 2.

The signal of the dimming control signal module 400 is a pulse width modulation dimming signal with an adjustable duty ratio of 0-100% or a direct current level dimming signal with an adjustable direct current level of 0-10 v.

Conventional dimming typically has a 4-wire input and a 1-wire input. As shown in fig. 2, 4-line input dimming means that a variable dc level can be added to a dimming line generally from 1 power line +1 dimming line, the level of the dimming line generally ranges from low to high, the current output of an LED power supply ranges from zero to rated output, that is, the LED lamp ranges from full dark to full bright, or a pulse signal is added to the dimming line, the duty ratio of the dimming signal generally ranges from 0% to 100%, and the current output of the LED power supply ranges from zero to rated output, that is, the LED lamp ranges from full dark to full bright. However, 1 additional dimming line is needed, which causes inconvenience to users in practical use.

As shown in fig. 3, 1-line input dimming means that 1 power line is also used as dimming line, and most of the dimming lines are dimming by adding a thyristor dimmer in front of the LED power input terminal. The basic principle is that part or all of the power frequency waveform of the input end power grid is cut off by the controllable silicon, the rectified average value of the waveform is correspondingly reduced, and the post-stage dimming circuit acquires the variable to adjust the corresponding output current. Generally, the current output of the LED power supply is from zero to the rated output, namely the LED lamp is from full dark to full bright through the size (zero) of the cut angle of the silicon controlled rectifier. From this kind of mode of adjusting luminance, can directly extinguish when adjusting luminance to 30%, because cut off 70% power frequency wave, its operating voltage drops too much after the rectification so that the main circuit can't maintain normal operating condition and stop work. When the starting-up is carried out, the silicon controlled dimmer is required to be adjusted to 40 percent firstly, otherwise, the circuit can not be started in the mode of the hard cut angle, so that the electromagnetic interference is multiplied in the dimming state.

As shown in fig. 4, another scheme is that ECHELON loads dimming information on a power line in a high-frequency pulse train, and reads the dimming information through a special LED power supply, so that the dimming information is adjusted correspondingly to an output current and is easily interfered by an external power grid.

The innovation point of the present invention is that the signal collection and shaping module 300 collects the voltage variation of the input source of the dc voltage input voltage adjustable module 100 through the input reverse connection prevention circuit 200, converts the voltage variation into the pulse width modulation dimming signal with adjustable duty ratio of 0-100% required by the general output adjustable power circuit part, or the adjustable dc level dimming signal of 0-10v, and adds the dimming signal to the dimming control signal module 400. The dimming control signal module 400 controls the output adjustable power circuit 500 to adjust its output current to achieve the dimming function of the lamp panel 2. According to the utility model, the two-wire dimming control circuit module is adopted, so that dimming signals are not interfered by a power grid, dimming can be performed in a 0-100% full range, independent dimming is not required, and the installation and wiring are convenient.

While the present invention has been described with reference to the specific embodiments, the present invention is not limited thereto, and various changes may be made without departing from the spirit of the present invention.

Claims

1. A variable dc voltage two-wire power supply control circuit, comprising: direct current voltage input voltage adjustable module (100), input anti-reverse connection circuit (200), signal acquisition shaping module (300), dimming control signal module (400) and output adjustable power circuit (500), direct current voltage input voltage adjustable module (100) is connected with switching power supply finely-adjustable output voltage (1), direct current voltage input voltage adjustable module (100) is connected with input anti-reverse connection circuit (200), input anti-reverse connection circuit (200) is connected with signal acquisition shaping module (300) and output adjustable power circuit (500), signal acquisition shaping module (300) is connected with dimming control signal module (400), dimming control signal module (400) is connected with output adjustable power circuit (500), output adjustable power circuit (500) is connected with lamp plate (2).

2. A variable dc voltage two-wire power supply control circuit according to claim 1, wherein: the signal of the dimming control signal module (400) is a pulse width modulation dimming signal with an adjustable duty ratio of 0-100% or a direct current level dimming signal with an adjustable direct current of 0-10 v.