Isolation type speed regulation and dimming device

Abstract

The utility model relates to an isolation type speed regulation dimming device which comprises an isolation type constant voltage power supply converter, a voltage stabilizing circuit and an adjustment control circuit. When in use, the voltage output by the isolated constant-voltage power converter is supplied to various types of electric appliances. The voltage stabilizing circuit is used for reducing the voltage output by the isolated constant-voltage power converter and further supplying power to an MCU chip and an optocoupler U1 of the adjusting control circuit; during use, the adjustment control circuit adjusts an input voltage value through the adjustment switch, the optocoupler U1 performs simulation according to the input voltage value to obtain an output voltage of the optocoupler U1, and the MCU chip outputs a corresponding PWM signal after receiving the output voltage of the optocoupler U1, so that the PWM signal can control the duty ratio of the adjustable type electric appliance during working, and then isolated adjustment is realized. According to the utility model, an adjustable type of electric appliance can be adjusted, and at the same time, another non-adjustable type of electric appliance can be supplied with power, thereby being very suitable for multifunctional equipment, simplifying the circuit structure of the multifunctional equipment and reducing the production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical circuits, in particular to an isolated speed regulation and dimming device. Background Technique

[0002] With the continuous development of the scientific and technological level, many multifunctional devices have emerged on the market. Some multifunctional devices include two types of electrical appliances: adjustable type and non-adjustable type. Among them, the adjustable type electrical appliances can be LED lights or exhaust fans. When in use, the user can adjust the brightness of the LED lights or the speed of the exhaust fans according to their own needs. The non-adjustable type electrical appliances can be Bluetooth speakers or alarms. Currently, the adjustable type electrical appliances are realized through constant voltage or constant current adjustment methods. When in use, the adjustable type electrical appliances are connected between the positive output terminal and the negative output terminal of the adjustment device. The input terminal of the adjustment device is electrically connected to the mains through an adjustment switch. By operating the adjustment switch, the voltage or current output by the adjustment device is adjusted, and then the adjustable type electrical appliances are adjusted. Since the voltage or current output by the adjustment device of such a multifunctional device is adjusted according to the usage needs, the non-adjustable type electrical appliances cannot be electrically connected to the adjustment device, resulting in the need to additionally install a power converter directly connected to the mains to drive the non-adjustable type electrical appliances to work in the multifunctional device. This makes the multifunctional device with the existing adjustment device have the disadvantages of complex circuit structure and high production cost. Content of the Utility Model

[0003] The purpose of the utility model is to provide an isolated speed regulation and dimming device, which has the advantages of simple structure, scientific design, can adjust the adjustable type electrical appliances and supply power to another non-adjustable type electrical appliance at the same time, is very suitable for use in multifunctional devices, simplifies the circuit structure of the multifunctional device and reduces the production cost.

[0004] The technical solution of the utility model is realized as follows: An isolated speed regulation and dimming device, in particular, includes an isolated constant voltage power converter, a voltage stabilizing circuit and an adjustment control circuit; wherein:

[0005] One input terminal of the isolated constant voltage power converter is a mains live wire connection terminal, and the other input terminal of the isolated constant voltage power converter is a mains neutral wire connection terminal. The isolated constant voltage power converter is used to step down the mains voltage;

[0006] The voltage stabilizing circuit is provided with an input terminal, a first output terminal and a second output terminal. The input terminal of the voltage stabilizing circuit is conducted with the positive output terminal of the isolated constant voltage power converter;

[0007] The adjustment control circuit includes an adjusted live wire input terminal, a resistor R1, a capacitor C1, a rectifier bridge D1, a resistor R2, a capacitor C2, a resistor R3, an optocoupler U1, an MCU chip, and a MOS transistor Q2;

[0008] One end of each of the resistor R1 and the capacitor C1 is electrically connected to the adjusted live wire input terminal, and the other end of each of the resistor R1 and the capacitor C1 is electrically connected to the A1 terminal of the rectifier bridge D1;

[0009] The A2 terminal of the rectifier bridge D1 is the connection terminal for the mains neutral wire;

[0010] One end of the resistor R2 is electrically connected to the B3 terminal of the rectifier bridge D1;

[0011] One end of the capacitor C2, one end of the resistor R3, and the pin 1 of the optocoupler U1 are all electrically connected to the other end of the resistor R2, and the other end of the capacitor C2, the other end of the resistor R3, and the pin 2 of the optocoupler U1 are all electrically connected to the C4 terminal of the rectifier bridge D1;

[0012] The power supply pin of the MCU chip is electrically connected to the first output terminal of the voltage stabilizing circuit; the first input pin of the MCU chip and the second output terminal of the voltage stabilizing circuit are both electrically connected to the pin 4 of the optocoupler U1; the second input pin of the MCU chip is electrically connected to the pin 3 of the optocoupler U1, and the ground pin of the MCU chip is electrically connected to the negative pole of the isolated constant voltage power converter;

[0013] The G pole of the MOS transistor Q2 is electrically connected to the first adjustment output pin of the MCU chip, the D pole of the MOS transistor Q2 is the connection terminal for the negative pole of the adjustable type electrical appliance, and the S pole of the MOS transistor Q2 is electrically connected to the negative pole of the isolated constant voltage power converter.

[0014] When this solution is applied to a multi-functional device, it can be used in combination with adjustable-type electrical appliances and non-adjustable-type electrical appliances at the same time. The rated voltages of the adjustable-type electrical appliances and the non-adjustable-type electrical appliances are the same. The adjustable-type electrical appliances are LED strips or exhaust fans, and the non-adjustable-type electrical appliances are Bluetooth speakers or alarms. The non-adjustable-type electrical appliances are electrically connected between the positive output terminal and the negative output terminal of the isolated constant-voltage power converter. For example, when this solution is installed on the ceiling together with the multi-functional device, the mains live wire connection terminal of the isolated constant-voltage power converter is conducted with the live wire on the ceiling, and the mains neutral wire connection terminal of the isolated constant-voltage power converter is conducted with the neutral wire on the ceiling, so that the voltage output by the isolated constant-voltage power converter directly drives the non-adjustable-type electrical appliances to work; the positive pole of the adjustable-type electrical appliance is conducted with the positive output terminal of the isolated constant-voltage power converter, the negative pole of the adjustable-type electrical appliance is conducted with the D pole of the MOS transistor Q2 of the adjustment control circuit, the adjustment live wire input terminal of the adjustment control circuit is conducted with the output terminal of the adjustment switch installed on the wall, and the A2 terminal of the rectifier bridge D1 of the adjustment control circuit is also conducted with the neutral wire on the ceiling, so that the isolated constant-voltage power converter, the voltage stabilization circuit and the adjustment control circuit cooperate to adjust the adjustable-type electrical appliances; when this solution adjusts the adjustable-type electrical appliances, the voltage stabilization circuit steps down the voltage output by the isolated constant-voltage power converter, and then supplies power to the MCU chip and the optocoupler U1 of the adjustment control circuit; when in use, the current input through the adjustment live wire input terminal is rectified by the resistor R1, the capacitor C1, the rectifier bridge D1, the resistor R2, the capacitor C2, and the resistor R3 and then input into the optocoupler U1. The optocoupler U1 simulates its output voltage according to the input voltage value, and after receiving the output voltage of the optocoupler U1 through the first input pin and the second input pin, the MCU chip outputs a corresponding PWM signal through the first adjustment output pin. The PWM signal output by the MCU chip can control the duty cycle when the adjustable-type electrical appliance works, and thus realizes isolated dimming or speed regulation; such a design can adjust the adjustable-type electrical appliances and supply power to another non-adjustable-type electrical appliance at the same time, which is very suitable for use in multi-functional devices to simplify the circuit structure of the multi-functional devices and reduce the production cost.

[0015] Furthermore, the adjustment control circuit further includes a MOS transistor Q3; the G pole of the MOS transistor Q3 is conducted with the second adjustment output pin of the MCU chip, the D pole of the MOS transistor Q3 is also the negative connection terminal of the adjustable-type electrical appliance, and the S pole of the MOS transistor Q3 is conducted with the negative pole of the isolated constant-voltage power converter.

[0016] Further, the voltage stabilizing circuit includes a resistor R5, a 7805 voltage stabilizing diode Q1, a resistor R4, and a capacitor C3. One end of the resistor R5 is the input end of the voltage stabilizing circuit, and the other end of the resistor R5 is electrically connected to the pin 1 of the 7805 voltage stabilizing diode Q1. The pin 2 of the 7805 voltage stabilizing diode Q1 is electrically connected to the negative pole of the isolated constant voltage power converter, and the pin 3 of the 7805 voltage stabilizing diode Q1 is the first output end. One end of the resistor R4 and the positive pole of the capacitor C3 are both electrically connected to the pin 3 of the 7805 voltage stabilizing diode Q1. The other end of the resistor R4 is the second output end, and the negative pole of the capacitor C3 is electrically connected to the negative pole of the isolated constant voltage power converter.

[0017] Further, the model of the MCU chip is preferably FT61EC21A-RB-SOP8.

[0018] The beneficial effects of the present utility model are as follows: it has a simple structure, scientific design, can adjust adjustable type electrical appliances and supply power to another non-adjustable type electrical appliance at the same time, is very suitable for use in multifunctional devices, and has the advantages of simplifying the circuit structure of multifunctional devices and reducing production costs. Description of the Drawings

[0019] Figure 1 It is the circuit schematic diagram of Example 1 applied to a multifunctional lamp.

[0020] Figure 2 It is the circuit schematic diagram of Example 2 applied to a multifunctional exhaust fan. Detailed Embodiments

[0021] Example 1

[0022] As Figure 1 shown, this embodiment is an isolated speed regulation and dimming device, including an isolated constant voltage power converter, a voltage stabilizing circuit, and an adjustment control circuit; wherein:

[0023] One input end of the isolated constant voltage power converter is the mains live wire connection end, and the other input end of the isolated constant voltage power converter is the mains neutral wire connection end. The isolated constant voltage power converter is used to step down the mains voltage to a 15V DC voltage.

[0024] The voltage stabilizing circuit is provided with an input end, a first output end, and a second output end. The input end of the voltage stabilizing circuit is electrically connected to the positive output end of the isolated constant voltage power converter. The voltage stabilizing circuit is used to process the 15V voltage so that the first output end and the second output end can output the voltages required for application.

[0025] The adjustment control circuit includes an adjustment live wire input end, a resistor R1, a capacitor C1, a rectifier bridge D1, a resistor R2, a capacitor C2, a resistor R3, an optocoupler U1, an MCU chip, a MOS transistor Q2, and a MOS transistor Q3.

[0026] One end of each of the resistor R1 and the capacitor C1 is electrically connected to the regulated live wire input terminal, and the other end of each of the resistor R1 and the capacitor C1 is electrically connected to the A1 terminal of the rectifier bridge D1;

[0027] The A2 terminal of the rectifier bridge D1 is the mains neutral wire connection terminal;

[0028] One end of the resistor R2 is electrically connected to the B3 terminal of the rectifier bridge D1;

[0029] One end of the capacitor C2, one end of the resistor R3, and the pin 1 of the optocoupler U1 are all electrically connected to the other end of the resistor R2, and the other end of the capacitor C2, the other end of the resistor R3, and the pin 2 of the optocoupler U1 are all electrically connected to the C4 terminal of the rectifier bridge D1;

[0030] The model of the MCU chip is FT61EC21A-RB-SOP8. The power supply pin of the MCU chip is electrically connected to the first output terminal of the voltage stabilizing circuit; the first input pin of the MCU chip and the second output terminal of the voltage stabilizing circuit are both electrically connected to the pin 4 of the optocoupler U1; the second input pin of the MCU chip is electrically connected to the pin 3 of the optocoupler U1, and the ground pin of the MCU chip is electrically connected to the negative pole of the isolated constant voltage power converter;

[0031] The G pole of the MOS transistor Q2 is electrically connected to the first adjustment output pin of the MCU chip. The D pole of the MOS transistor Q2 is the negative pole connection terminal of the adjustable type electrical appliance, and the S pole of the MOS transistor Q2 is electrically connected to the negative pole of the isolated constant voltage power converter;

[0032] The G pole of the MOS transistor Q3 is electrically connected to the second adjustment output pin of the MCU chip. The D pole of the MOS transistor Q3 is also the negative pole connection terminal of the adjustable type electrical appliance, and the S pole of the MOS transistor Q3 is electrically connected to the negative pole of the isolated constant voltage power converter.

[0033] To make the voltage stabilizing circuit more reasonable, as Figure 1 shown, the voltage stabilizing circuit includes a resistor R5, a 7805 voltage stabilizing diode Q1, a resistor R4, and a capacitor C3. One end of the resistor R5 is the input terminal of the voltage stabilizing circuit, and the other end of the resistor R5 is electrically connected to the pin 1 of the 7805 voltage stabilizing diode Q1; the pin 2 of the 7805 voltage stabilizing diode Q1 is electrically connected to the negative pole of the isolated constant voltage power converter, and the pin 3 of the 7805 voltage stabilizing diode Q1 is the first output terminal; one end of the resistor R4 and the positive electrode of the capacitor C3 are both electrically connected to the pin 3 of the 7805 voltage stabilizing diode Q1, the other end of the resistor R4 is the second output terminal, and the negative electrode of the capacitor C3 is electrically connected to the negative pole of the isolated constant voltage power converter.

[0034] As Figure 1As shown, when this embodiment is applied to a multi-functional lamp, it can be used in combination with two types of electrical appliances. The rated voltage of all electrical appliances is 15V. The first type of electrical appliance is the first light strip and the second light strip. When in use, the number of light strips is determined by the number of MOS transistors in the adjustment control circuit. The other type of electrical appliance is a Bluetooth speaker, which is electrically connected between the positive output terminal and the negative output terminal of the isolated constant voltage power converter. For example, when this embodiment is installed on the ceiling together with the multi-functional lamp, the mains live wire connection terminal of the isolated constant voltage power converter is conducted with the live wire on the ceiling, and the mains neutral wire connection terminal of the isolated constant voltage power converter is conducted with the neutral wire on the ceiling, so that the voltage output by the isolated constant voltage power converter directly drives the Bluetooth speaker to work; the positive poles of the first light strip and the second light strip are respectively conducted with the positive output terminal of the isolated constant voltage power converter. The negative pole of the first light strip is conducted with the D pole of the MOS transistor Q2 in the adjustment control circuit, and the negative pole of the second light strip is conducted with the D pole of the MOS transistor Q3 in the adjustment control circuit. The adjustment live wire input terminal of the adjustment control circuit is conducted with the output terminal of the dimming switch installed on the wall, and the A2 terminal of the rectifier bridge D1 in the adjustment control circuit is also conducted with the neutral wire on the ceiling, so that the isolated constant voltage power converter, the voltage stabilizing circuit and the adjustment control circuit cooperate to dim the first light strip and the second light strip; when this isolated speed regulation and dimming device dims the first light strip and the second light strip, the voltage stabilizing circuit steps down the voltage output by the isolated constant voltage power converter, and then supplies power to the MCU chip and the optocoupler U1 in the adjustment control circuit; when in use, the current input through the adjustment live wire input terminal is rectified by the resistor R1, the capacitor C1, the rectifier bridge D1, the resistor R2, the capacitor C2 and the resistor R3 and then input into the optocoupler U1. The optocoupler U1 simulates its own output voltage according to the input voltage value. After receiving the output voltage of the optocoupler U1 through the first input pin and the second input pin, the MCU chip outputs corresponding PWM signals through the first adjustment output pin and the second adjustment output pin respectively. The PWM signals output by the MCU chip can control the duty cycle when the first light strip and the second light strip work, thereby realizing isolated dimming; such a design can also supply power to another type of electrical appliance while dimming, which is very suitable for use in multi-functional lamps to simplify the circuit structure of the multi-functional lamp and reduce the production cost.

[0035] Embodiment 2

[0036] This embodiment is also an isolated speed regulation and dimming device. The difference between this embodiment and Embodiment 1 is that: there is no MOS transistor Q3 in this embodiment. As Figure 2As shown, when this embodiment is applied to a multifunctional exhaust fan with a Bluetooth speaker function, the Bluetooth speaker is electrically connected between the positive output terminal and the negative output terminal of the isolated constant voltage power converter. The positive pole of the motor of the exhaust fan is conducted to the positive output terminal of the isolated constant voltage power converter, and the negative pole of the motor of the exhaust fan is conducted to the D pole of the MOS transistor Q2 of the adjustment control circuit. The method of adjusting the speed of the exhaust fan in this embodiment is the same as the method of adjusting the light of the multifunctional lamp in Embodiment 1, and will not be elaborated here.

Claims

1. An isolated speed regulation and dimming device, characterized in that: It includes an isolated constant-voltage power converter, a voltage stabilizing circuit, and an adjustment control circuit; among which: One input terminal of the isolated constant-voltage power converter is the mains live wire connection terminal, and the other input terminal of the isolated constant-voltage power converter is the mains neutral wire connection terminal. The isolated constant-voltage power converter is used to step down the mains voltage; The voltage stabilizing circuit is provided with an input terminal, a first output terminal, and a second output terminal. The input terminal of the voltage stabilizing circuit is electrically connected to the positive output terminal of the isolated constant-voltage power converter; The adjustment control circuit includes an adjustment live wire input terminal, resistor R1, capacitor C1, rectifier bridge D1, resistor R2, capacitor C2, resistor R3, optocoupler U1, MCU chip, and MOS transistor Q2; One end of each of resistor R1 and capacitor C1 is electrically connected to the adjustment live wire input terminal, and the other end of each of resistor R1 and capacitor C1 is electrically connected to terminal A1 of rectifier bridge D1; Terminal A2 of rectifier bridge D1 is the mains neutral wire connection terminal; One end of resistor R2 is electrically connected to terminal B3 of rectifier bridge D1; One end of capacitor C2, one end of resistor R3, and pin 1 of optocoupler U1 are all electrically connected to the other end of resistor R2. The other end of capacitor C2, the other end of resistor R3, and pin 2 of optocoupler U1 are all electrically connected to terminal C4 of rectifier bridge D1; The power supply pin of the MCU chip is electrically connected to the first output terminal of the voltage stabilizing circuit; the first input pin of the MCU chip and the second output terminal of the voltage stabilizing circuit are both electrically connected to pin 4 of optocoupler U1; the second input pin of the MCU chip is electrically connected to pin 3 of optocoupler U1, and the ground pin of the MCU chip is electrically connected to the negative pole of the isolated constant-voltage power converter; The G pole of MOS transistor Q2 is electrically connected to the first adjustment output pin of the MCU chip. The D pole of MOS transistor Q2 is the negative connection terminal of the adjustable type electrical appliance. The S pole of MOS transistor Q2 is electrically connected to the negative pole of the isolated constant-voltage power converter.

2. The isolated speed regulation and dimming device according to claim 1, wherein: The adjustment control circuit further includes MOS transistor Q3; the G pole of MOS transistor Q3 is electrically connected to the second adjustment output pin of the MCU chip. The D pole of MOS transistor Q3 is also the negative connection terminal of the adjustable type electrical appliance. The S pole of MOS transistor Q3 is electrically connected to the negative pole of the isolated constant-voltage power converter.

3. The isolated speed regulation and dimming device according to claim 1, wherein: The voltage stabilizing circuit includes resistor R5, 7805 voltage stabilizing diode Q1, resistor R4, and capacitor C3; one end of resistor R5 is the input terminal of the voltage stabilizing circuit, and the other end of resistor R5 is electrically connected to pin 1 of 7805 voltage stabilizing diode Q1; pin 2 of 7805 voltage stabilizing diode Q1 is electrically connected to the negative pole of the isolated constant-voltage power converter, and pin 3 of 7805 voltage stabilizing diode Q1 is the first output terminal; one end of resistor R4 and the positive electrode of capacitor C3 are both electrically connected to pin 3 of 7805 voltage stabilizing diode Q1. The other end of resistor R4 is the second output terminal, and the negative electrode of capacitor C3 is electrically connected to the negative pole of the isolated constant-voltage power converter.

4. The isolated speed regulation and light dimming device according to claim 1, characterized in that: The model of the MCU chip is FT61EC21A-RB-SOP8.

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