Dimming power supply

Abstract

The utility model relates to the technical field of lamp power supplies, and discloses a dimming power supply, which comprises an electromagnetic filter circuit, a relay, a leakage protection circuit, a power supply circuit, a power factor correction circuit, a DC / DC conversion circuit, a signal conversion unit, an MCU control system and a dimming unit. The input end of the electromagnetic filter circuit is connected with an input power supply, and the output end is connected with the anode of the lamp load through the relay, the power factor correction circuit and the DC / DC conversion circuit in sequence. The output end of the leakage protection circuit is connected with a coil of the relay, and the leakage protection circuit is connected with the output end of the electromagnetic filter circuit through the power supply circuit. The MCU control system is connected with the dimming signal receiving unit, the MCU control system is connected with the output end of the relay through the signal conversion unit, the MCU control system is connected with the negative electrode of the lamp load through the dimming unit, and the MCU control system is connected with the control end of the DC / DC conversion circuit. The dimming power supply is good in applicability, can meet the power utilization standard of most areas, and can reduce the cost of customers.

Description

Technical Field

[0001] This utility model relates to the field of lighting power supply technology, specifically to a dimming power supply. Background Technology

[0002] With continuous social progress and rapid development of information technology, people's living standards are constantly improving, and their demands for personalized lighting environments are also increasing. High-voltage LED strips, due to their higher input voltage and smaller voltage drop attenuation over the same distance compared to low-voltage strips, are more suitable for long-distance wiring. However, traditional high-voltage LED strip power supplies have a single input and output voltage, making them incompatible with household and industrial power standards in most parts of the world. This results in manufacturers stockpiling too many dimming power supply products with different parameters. Furthermore, existing high-voltage LED strip power supplies generally lack dimming and color temperature adjustment functions, preventing personalized lighting settings, and they lack leakage protection. In the event of a sudden extreme leakage, the luminaire load can easily be damaged. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a dimming power supply that can output a variety of different voltage specifications, has leakage protection, can adapt to high voltage light strips of different specifications, and has high safety in use.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: A dimming power supply includes an electromagnetic filter circuit, a relay, a leakage protection circuit, a power supply circuit, a power factor correction circuit, a DC / DC conversion circuit, a signal conversion unit, an MCU control system, and a dimming unit. The input terminal of the electromagnetic filter circuit is connected to an input power supply. The relay is connected in series between the output terminal of the electromagnetic filter circuit and the input terminal of the power factor correction circuit. The output terminal of the power factor correction circuit is connected to the positive terminal of the lamp load through the DC / DC conversion circuit. The output terminal of the leakage protection circuit is connected to the coil of the relay. The leakage protection circuit is connected to the output terminal or the input power supply of the electromagnetic filter circuit through the power supply circuit. The MCU control system is connected to a dimming signal receiving unit. The MCU control system is connected to the output terminal of the relay through the signal conversion unit. The MCU control system is connected to the negative terminal of the lamp load through the dimming unit. The MCU control system is connected to the control terminal of the DC / DC conversion circuit.

[0005] Compared to existing technologies, the advantages of this invention are as follows: The leakage protection circuit can detect whether the lamp has leakage, and when leakage is detected, it controls the relay to disconnect the power supply to the lamp load, protecting the safety of the power supply and the lamp load. The MCU control system can receive the voltage regulation signal mounted on the input AC voltage through the signal conversion circuit, and control the DC / DC conversion circuit to adjust the voltage output to the lamp load to adapt to high-voltage lamp strips with different specifications. The electromagnetic filtering circuit can reduce the electromagnetic interference of the power supply to surrounding electrical equipment and the electromagnetic interference of external electrical equipment to the power supply, enabling the power supply to meet the electromagnetic interference standards of different regions. This dimming power supply has a wide input and output voltage range, strong adaptability, and high safety in use.

[0006] The dimming power supply described above includes a dimming unit comprising multiple dimming circuits.

[0007] The aforementioned dimming power supply includes a signal conversion unit comprising a phase-cutting chopper signal conversion circuit and / or a power line carrier signal conversion circuit.

[0008] The dimming power supply and dimming signal receiving unit mentioned above include a wired control signal receiving circuit and / or a wireless control signal receiving circuit.

[0009] The aforementioned dimming power supply includes at least one of the following wired control signal receiving circuits: a DALI signal receiving circuit, a DMX signal receiving circuit, a 0-10V signal receiving circuit, a 1-10V signal receiving circuit, a 10V PWM signal receiving circuit, and an adjustable resistor signal receiving circuit.

[0010] The aforementioned dimming power supply includes a wireless control signal receiving circuit comprising at least one of a ZigBee module, a 433MHz module, an NFC module, a Bluetooth module, and a Wi-Fi module.

[0011] The aforementioned dimming power supply also includes a peripheral unit, which is connected to the MCU control system.

[0012] The aforementioned dimming power supply includes, among other things, a peripheral unit comprising at least one of a toggle switch, an adjustable resistor, a rotary potentiometer, an encoder potentiometer, and a temperature sensor.

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the dimming power supply according to an embodiment of the present invention. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below, with reference to Figure 1This utility model provides a dimming power supply, including an electromagnetic filter circuit, a relay, a leakage current protection circuit, a power supply circuit, a power factor correction circuit, a DC / DC conversion circuit, a signal conversion unit, an MCU control system, and a dimming unit. The input terminal of the electromagnetic filter circuit is connected to the input power supply. The relay is connected in series between the output terminal of the electromagnetic filter circuit and the input terminal of the power factor correction circuit. The output terminal of the power factor correction circuit is connected to the positive terminal of the lamp load through the DC / DC conversion circuit. The power factor correction circuit improves the input current waveform, increases the power factor, reduces harmonic injection into the power grid, stabilizes the output voltage, and improves the output power quality, thus allowing compatibility with a relatively wide input voltage range and maintaining a stable high voltage output to the DC / DC conversion circuit. The output terminal of the leakage current protection circuit is connected to the coil of the relay. The leakage current protection circuit is connected to the output terminal of the electromagnetic filter circuit through the power supply circuit, obtaining the electrical energy required for operation from the DC power output after rectification by the electromagnetic filter circuit. It is understood that in some embodiments, the electrical energy required for the leakage current protection circuit to operate can also be obtained directly from the input power supply by the power supply circuit. The electromagnetic filtering circuit reduces electromagnetic interference from the power supply to surrounding electrical equipment and from external electrical equipment to the power supply, ensuring the power supply meets electromagnetic interference standards in different regions. The leakage current protection circuit detects leakage in the lighting fixture and controls the relay to disconnect when leakage is detected, providing leakage protection for both the power supply and the lighting load. The MCU control system is connected to the dimming signal receiving unit, and through the signal conversion unit, it is connected to the output of the relay. The MCU control system is also connected to the negative terminal of the lighting load via the dimming unit and the control terminal of the DC / DC conversion circuit. The MCU control system identifies dimming signals input through the input line via the signal conversion unit, or receives external dimming signals via the dimming signal receiving unit. Based on the dimming signals, it controls the DC / DC conversion circuit and the dimming unit to provide the lighting load with a suitable output voltage and achieve the desired lighting effect.

[0016] This dimming power supply features a wide input and output voltage range, making it compatible with household and industrial power standards in most parts of the world. It can accommodate high-voltage LED strips with different input voltage specifications and meets electromagnetic interference standards in various regions. This reduces the variety of power supplies customers need to stock, lowers production costs, and provides leakage protection for the lighting load through a leakage current protection circuit, improving power supply safety. Furthermore, this dimming power supply can both identify dimming signals on the input line through a signal conversion unit and receive external dimming signals through a dimming signal input unit, facilitating intelligent upgrades to lighting circuits. It is understood that the specific structures of the electromagnetic filter circuit, leakage protection circuit, power supply circuit, and DC / DC conversion circuit are common knowledge in the field and will not be elaborated upon here.

[0017] Reference Figure 1 In this embodiment, the signal conversion unit includes a phase-cut chopper signal conversion circuit or a power line carrier signal conversion circuit, which is selected according to the way the dimming signal is carried on the voltage of the input line. The specific structure of the phase-cut chopper signal conversion circuit and the power line carrier signal conversion circuit is common knowledge in the art and will not be described in detail here.

[0018] Reference Figure 1 In this embodiment, the dimming unit includes multiple dimming circuits, which can be used to adjust the color temperature and brightness, or to adjust the brightness and color temperature of multiple LEDs of different colors in the colored LED strip, so as to drive the LED strip to achieve the desired lighting effect and facilitate users to set more personalized color effects. The dimming circuit can be a MOSFET driver circuit, such as a PWM driver circuit, which receives the PWM control signal output by the MCU control system and adjusts the conduction time of the MOSFET according to the duty cycle of the PWM control signal to adjust the color temperature or brightness of the lamp.

[0019] Reference Figure 1 In this embodiment, to ensure the dimming power supply is compatible with more dimming control methods, the dimming signal receiving unit includes a wired control signal receiving circuit and / or a wireless control signal receiving circuit. It is understood that the wired control signal receiving circuit can be one or more common wired dimming signal methods such as DALI signal receiving circuit, DMX signal receiving circuit, 0-10V signal receiving circuit, 1-10V signal receiving circuit, 10V PWM signal receiving circuit, and adjustable resistor signal receiving circuit. The wireless control signal receiving circuit can include various wireless communication modules, such as ZigBee modules, 433MHz modules, NFC modules, Bluetooth modules, and Wi-Fi modules.

[0020] In some embodiments, the dimming power supply may further include a peripheral unit connected to the MCU control system. The peripheral unit is used to finely adjust parameters such as the output voltage, output current, and output frequency of the dimming power supply to meet the needs of more types of lighting loads and achieve more diverse dimming effects. The peripheral unit may include input peripheral devices such as toggle switches, adjustable resistors, rotary potentiometers, coded potentiometers, keyboards, and touchscreens. In some embodiments, the peripheral unit may also include sensors such as temperature sensors to monitor the temperature and other states of the lighting load, thereby facilitating more intelligent closed-loop control of the lighting load based on its temperature and ensuring the stability of the lighting load's operation.

[0021] It should be noted that in the description of this utility model, any descriptions of orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation of this utility model.

[0022] In the description of this utility model, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is mentioned, it is only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A dimming power supply, characterized in that, The system includes an electromagnetic filter circuit, a relay, a leakage current protection circuit, a power supply circuit, a power factor correction circuit, a DC / DC converter circuit, a signal conversion unit, an MCU control system, and a dimming unit. The input terminal of the electromagnetic filter circuit is connected to an input power supply. The relay is connected in series between the output terminal of the electromagnetic filter circuit and the input terminal of the power factor correction circuit. The output terminal of the power factor correction circuit is connected to the positive terminal of the lamp load through the DC / DC converter circuit. The output terminal of the leakage current protection circuit is connected to the coil of the relay. The leakage current protection circuit is connected to the output terminal or input power supply of the electromagnetic filter circuit through the power supply circuit. The MCU control system is connected to a dimming signal receiving unit. The MCU control system is connected to the output terminal of the relay through the signal conversion unit. The MCU control system is connected to the negative terminal of the lamp load through the dimming unit. The MCU control system is also connected to the control terminal of the DC / DC converter circuit.

2. The dimming power supply according to claim 1, characterized in that, The dimming unit includes multiple dimming circuits.

3. The dimming power supply according to claim 1, characterized in that, The signal conversion unit includes a phase-cut chopper signal conversion circuit and / or a power line carrier signal conversion circuit.

4. The dimming power supply according to claim 1, characterized in that, The dimming signal receiving unit includes a wired control signal receiving circuit and / or a wireless control signal receiving circuit.

5. The dimming power supply according to claim 4, characterized in that, The wired control signal receiving circuit includes at least one of the following: a DALI signal receiving circuit, a DMX signal receiving circuit, a 0-10V signal receiving circuit, a 1-10V signal receiving circuit, a 10V PWM signal receiving circuit, and an adjustable resistor signal receiving circuit.

6. The dimming power supply according to claim 4, characterized in that, The wireless control signal receiving circuit includes at least one of a ZigBee module, a 433MHz module, an NFC module, a Bluetooth module, and a Wi-Fi module.

7. The dimming power supply according to claim 1, characterized in that, It also includes peripheral units, which are connected to the MCU control system.

8. The dimming power supply according to claim 7, characterized in that, The peripheral unit includes at least one of a toggle switch, an adjustable resistor, a rotary potentiometer, an coded potentiometer, and a temperature sensor.

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