A wall switch switching mode control circuit compatible with phase-cut dimmer

Abstract

The utility model discloses a wall switch switching mode control circuit compatible with a phase-cut dimmer, and relates to the technical field of electrical engineering. The wall switch switching mode control circuit compatible with the phase-cut dimmer comprises: a phase-cut dimming circuit, which is used for performing phase-cut dimming processing; changing the voltage on the live wire and feeding it back to a protection rectifier circuit; the protection rectifier circuit is used for converting input alternating current into direct current, obtaining a phase-cut dimming signal based on the phase-cut dimming circuit, and outputting it to a mode switching control detection circuit; the mode switching control detection circuit is used for feeding back the phase-cut dimming information to a single-chip microcomputer; compared with the prior art, the utility model has the following beneficial effects: the utility model additionally adds a triode and a peripheral device of the triode (a high-low level output module) to a common detection circuit, so that the single-chip microcomputer detects reliable and stable high and low levels, so that the lamp can obtain more stable main light-night light mode switching and no mixed light when the phase-cut dimmer is connected.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical engineering, in particular to a wall switch switching mode control circuit compatible with a phase-cutting dimmer. Background Art

[0002] There is a kind of lamp that has both main lighting and night light functions. Generally, the main light and night light lighting mode are switched through a wall switch. A signal acquisition circuit is required to identify this mode switching. Generally, the most common ones on the market are composed of resistor voltage division, voltage regulator diode voltage regulation and capacitor filtering.

[0003] like Figure 1 As shown in the figure, it is a sampling control circuit diagram of a common LED lighting fixture on the market. The main lighting with a night light has a switching mode. It is composed of resistors, capacitors, and voltage regulator tubes. V+ is connected to high voltage, and OUT is connected to the IO port of the microcontroller.

[0004] When the lamp is working normally, the AC power enters the mode switching control detection circuit after passing through the phase-cut dimmer and bridge rectifier. The high-voltage DC voltage is divided by resistors R3, R4, and R5, stabilized by diode ZD1, and filtered by capacitor EC1 before being output to the microcontroller. Since the output voltage waveform and voltage are inconsistent after the dimmer phase cutting, switching errors or mixed light will occur when the voltage is directly divided by resistors and stabilized before being identified by the microcontroller after rectification, which needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a wall switch switching mode control circuit compatible with a phase-cut dimmer to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A wall switch switching mode control circuit compatible with a phase-cut dimmer, comprising:

[0008] The phase-cut dimming circuit is used for phase-cut dimming processing; the voltage on the live wire is changed and fed back to the protection rectifier circuit;

[0009] A protection rectifier circuit is used to convert the input AC power into DC power, obtain a phase-cut dimming signal based on the phase-cut dimming circuit, and output it to the mode switching control detection circuit;

[0010] Mode switching control detection circuit, used to feed back phase-cut dimming information to the microcontroller;

[0011] The phase-cut dimming circuit is connected to the protection rectifier circuit, and the protection rectifier circuit is connected to the mode switching control detection circuit;

[0012] The mode switching control detection circuit includes:

[0013] The signal detection module is used to detect the input phase-cut dimming signal, obtain sampling information and output it to the high and low level output module;

[0014] High and low level output module, used to select whether to output voltage to the microcontroller based on sampling information;

[0015] The signal detection module is connected to the high and low level output modules.

[0016] As a further solution of the present invention: the phase-cut dimming circuit includes a phase-cut dimmer, and the phase-cut dimmer is connected to the live wire L.

[0017] As a further solution of the utility model: the protection rectifier circuit includes a fuse FR1, a varistor MOV1, and a rectifier BD1. One end of the fuse FR1 is connected to the live wire L, the other end of the fuse FR1 is connected to one end of the varistor MOV1 and the first end of the rectifier BD1, the other end of the varistor MOV1 is connected to the neutral line N and the third end of the rectifier BD1, the second end of the rectifier BD1 is connected to the mode switching control detection circuit, and the fourth end of the rectifier BD1 is grounded.

[0018] As a further solution of the utility model: the signal detection module includes resistor R3, resistor R4, resistor R5, diode ZD1, and capacitor EC1, one end of the resistor R3 is connected to the protection rectifier circuit, the other end of the resistor R3 is connected to one end of the resistor R4, the other end of the resistor R4 is connected to the cathode of the diode ZD1, one end of the resistor R5, one end of the capacitor EC1, and the high and low level output module, the anode of the diode ZD1 is grounded, the other end of the resistor R5 is grounded, and the other end of the capacitor EC1 is grounded.

[0019] As a further solution of the utility model: the high and low level output module includes a resistor R89, a transistor Q10, a resistor R86, a resistor R87, and a capacitor C31. One end of the resistor R89 ​​is connected to the signal detection module, the other end of the resistor R89 ​​is connected to the base of the transistor Q10, the emitter of the transistor Q10 is grounded, the collector of the transistor Q10 is connected to one end of the resistor R86, one end of the resistor R87, and one end of the capacitor C31, the other end of the capacitor C31 is grounded, the other end of the resistor R86 is connected to a 5V voltage, and the other end of the resistor R87 is connected to a single-chip computer.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adds transistors and peripheral devices of the transistors (high and low level output modules) to the common detection circuit, so that the single-chip microcomputer can detect reliable and stable high and low levels, and can enable the lamp to obtain more stable main light-night light mode switching and no mixed light when the phase dimmer is connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a sampling control circuit diagram of the existing main lighting with night light switching mode.

[0022] Figure 2 The circuit diagram of a wall switch switching mode control circuit compatible with a phase-cut dimmer is shown. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] See also Figure 2 , a wall switch switching mode control circuit compatible with a phase-cut dimmer, comprising:

[0025] The phase-cut dimming circuit is used for phase-cut dimming processing; the voltage on the live wire is changed and fed back to the protection rectifier circuit;

[0026] A protection rectifier circuit is used to convert the input AC power into DC power, obtain a phase-cut dimming signal based on the phase-cut dimming circuit, and output it to the mode switching control detection circuit;

[0027] Mode switching control detection circuit, used to feed back phase-cut dimming information to the microcontroller;

[0028] The phase-cut dimming circuit is connected to the protection rectifier circuit, and the protection rectifier circuit is connected to the mode switching control detection circuit;

[0029] The mode switching control detection circuit includes:

[0030] The signal detection module is used to detect the input phase-cut dimming signal, obtain sampling information and output it to the high and low level output module;

[0031] High and low level output module, used to select whether to output voltage to the microcontroller based on sampling information;

[0032] The signal detection module is connected to the high and low level output modules.

[0033] In this example: See Figure 2 The phase-cut dimming circuit includes a phase-cut dimmer, and the phase-cut dimmer is connected to the live wire L.

[0034] When the phase-cut dimmer performs phase-cut dimming, the voltage condition on the live wire L is changed, thereby changing the voltage information in the protection rectifier circuit.

[0035] In this example: See Figure 2The protection rectifier circuit includes a fuse FR1, a varistor MOV1, and a rectifier BD1. One end of the fuse FR1 is connected to the live wire L, the other end of the fuse FR1 is connected to one end of the varistor MOV1 and the first end of the rectifier BD1, the other end of the varistor MOV1 is connected to the neutral line N and the third end of the rectifier BD1, the second end of the rectifier BD1 is connected to the mode switching control detection circuit, and the fourth end of the rectifier BD1 is grounded.

[0036] The input voltage of the live wire L and the neutral wire N is output to the rectifier BD1 after passing through the fuse FR1 (overcurrent disconnection protection circuit) and the varistor MOV1 (overtemperature resistance increase protection circuit). The rectifier BD1 converts it into a DC voltage and outputs it to the signal detection module. When the phase-cut dimmer performs phase-cut dimming, the voltage information will change.

[0037] In this example: See Figure 2 The signal detection module includes a resistor R3, a resistor R4, a resistor R5, a diode ZD1, and a capacitor EC1. One end of the resistor R3 is connected to the protection rectifier circuit, the other end of the resistor R3 is connected to one end of the resistor R4, the other end of the resistor R4 is connected to the cathode of the diode ZD1, one end of the resistor R5, one end of the capacitor EC1, and a high and low level output module. The anode of the diode ZD1 is grounded, the other end of the resistor R5 is grounded, and the other end of the capacitor EC1 is grounded.

[0038] When voltage is input, resistors R3, R4 and R5 divide the voltage and output it. Resistor R5 is used as a sampling resistor, and the voltage on it is used to feedback the current working state of the phase-cut dimmer. Diode ZD1 is a voltage regulator, used as a voltage limiting device to prevent the voltage on the sampling resistor from being too large, and the voltage output to the microcontroller is too large, causing damage to the microcontroller.

[0039] In this example: See Figure 2 The high and low level output module includes a resistor R89, a transistor Q10, a resistor R86, a resistor R87, and a capacitor C31. One end of the resistor R89 ​​is connected to the signal detection module, the other end of the resistor R89 ​​is connected to the base of the transistor Q10, the emitter of the transistor Q10 is grounded, the collector of the transistor Q10 is connected to one end of the resistor R86, one end of the resistor R87, and one end of the capacitor C31, the other end of the capacitor C31 is grounded, the other end of the resistor R86 is connected to a 5V voltage, and the other end of the resistor R87 is connected to a single-chip computer.

[0040] When there is voltage on resistor R5, transistor Q10 is turned on and grounded, outputting a low level to the microcontroller; when there is no voltage on resistor R5, transistor Q10 is turned off, and the 5V voltage passes through resistors R86 and R87 to output a high level to the microcontroller. By setting up high and low level output modules, the voltage and waveform of the phase-cut dimmer after phase cutting are inconsistent, and the microcontroller recognizes switching errors or mixed light.

[0041] The working principle of the utility model is: the phase-cut dimming circuit is used to perform phase-cut dimming processing; the voltage on the live line is changed and fed back to the protection rectifier circuit; the protection rectifier circuit is used to convert the input alternating current into direct current, and the phase-cut dimming signal is obtained based on the phase-cut dimming circuit, and output to the mode switching control detection circuit; the mode switching control detection circuit is used to feed back the phase-cut dimming information to the single-chip microcomputer; the mode switching control detection circuit includes: a signal detection module is used to detect the input phase-cut dimming signal, obtain sampling information and output it to the high and low level output module; the high and low level output module is used to select whether to output voltage to the single-chip microcomputer based on the sampling information.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A wall switch switching mode control circuit compatible with a phase-cut dimmer, characterized in that: The wall switch switching mode control circuit compatible with the phase-cut dimmer includes: The phase-cut dimming circuit is used for phase-cut dimming processing; the voltage on the live wire is changed and fed back to the protection rectifier circuit; A protection rectifier circuit is used to convert the input AC power into DC power, obtain a phase-cut dimming signal based on the phase-cut dimming circuit, and output it to the mode switching control detection circuit; Mode switching control detection circuit, used to feed back phase-cut dimming information to the microcontroller; The phase-cut dimming circuit is connected to the protection rectifier circuit, and the protection rectifier circuit is connected to the mode switching control detection circuit; The mode switching control detection circuit includes: The signal detection module is used to detect the input phase-cut dimming signal, obtain sampling information and output it to the high and low level output module; High and low level output module, used to select whether to output voltage to the microcontroller based on sampling information; The signal detection module is connected to the high and low level output modules.

2. The wall switch switching mode control circuit compatible with the phase-cut dimmer according to claim 1, characterized in that: The phase-cut dimming circuit comprises a phase-cut dimmer, and the phase-cut dimmer is connected to the live wire L.

3. The wall switch switching mode control circuit compatible with the phase-cut dimmer according to claim 1, characterized in that: The protection rectifier circuit includes a fuse FR1, a varistor MOV1, and a rectifier BD1. One end of the fuse FR1 is connected to the live wire L, the other end of the fuse FR1 is connected to one end of the varistor MOV1 and the first end of the rectifier BD1, the other end of the varistor MOV1 is connected to the neutral line N and the third end of the rectifier BD1, the second end of the rectifier BD1 is connected to the mode switching control detection circuit, and the fourth end of the rectifier BD1 is grounded.

4. The wall switch switching mode control circuit compatible with the phase-cut dimmer according to claim 1, characterized in that: The signal detection module includes resistor R3, resistor R4, resistor R5, diode ZD1, and capacitor EC1. One end of resistor R3 is connected to the protection rectifier circuit, the other end of resistor R3 is connected to one end of resistor R4, the other end of resistor R4 is connected to the cathode of diode ZD1, one end of resistor R5, one end of capacitor EC1, and a high and low level output module. The anode of diode ZD1 is grounded, the other end of resistor R5 is grounded, and the other end of capacitor EC1 is grounded.

5. The wall switch switching mode control circuit compatible with a phase-cut dimmer according to any one of claims 1 to 4, characterized in that: The high and low level output module includes a resistor R89, a transistor Q10, a resistor R86, a resistor R87, and a capacitor C31. One end of the resistor R89 ​​is connected to the signal detection module, the other end of the resistor R89 ​​is connected to the base of the transistor Q10, the emitter of the transistor Q10 is grounded, the collector of the transistor Q10 is connected to one end of the resistor R86, one end of the resistor R87, and one end of the capacitor C31, the other end of the capacitor C31 is grounded, the other end of the resistor R86 is connected to a 5V voltage, and the other end of the resistor R87 is connected to a single-chip computer.

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