High-energy-efficiency intelligent control switching power supply system

Abstract

The invention relates to a high-energy-efficiency intelligent control switching power supply system, which specifically comprises a switching power supply BD1, a PWM control chip U2, a VCC voltage stabilization unit, a clamping circuit, an indication circuit unit and a lamp strip voltage intelligent control unit, is designed to be used for automatically adapting and optimizing the energy consumption of LED lighting equipment, can realize 12V, 24V, 36V and 48V voltage output, and can realize the intelligent control of the LED lighting equipment. And the input power is kept to be 1.0-1.5 times of the rated power constantly under different load conditions. Through the indication circuit unit and the lamp strip voltage intelligent control unit, visual voltage switching is supported, user interactivity and operation convenience are enhanced, and equipment damage caused by misoperation is prevented through an intelligent identification function. The power supply is especially suitable for the LED lighting industry with high efficiency and high adaptability requirements, and provides an energy-saving, safe and user-friendly power supply solution.

Description

Technical Field

[0001] The present invention relates to the technical field of switching power supplies, and more particularly to a high-energy-efficiency intelligent control switching power supply system. Background Art

[0002] At present, a switching power supply cannot achieve a wide voltage output of 12-48V; nor can it keep the input power constant at 1.0-1.5 times the rated power under the wide voltage output state, resulting in a great waste of resources and environmental pollution; ordinary LED switching power supplies do not have the function of intelligently identifying the voltage of the light strip, and consumers may burn the light strip due to excessive misoperation; the typical output voltage of the switching power supply has four conventional typical voltages of 12V; 24V; 36V; 48V, but the existing switching power supply cannot achieve the four conventional typical voltage outputs; it is impossible to keep the input power constant at 1.0-1.5 times the rated power under the wide voltage output state. Summary of the invention

[0003] The purpose of the present invention is to provide a high-efficiency intelligent control switching power supply system and system to solve the problem in the prior art that the monitoring and equipment control of the comprehensive mining working face are divided into multiple systems, the functions are dispersed, and the centralized control warehouse has poor mobility and cannot move with the personnel.

[0004] In order to solve the above problems, the energy-efficient intelligent control switching power supply system of the present invention adopts the following technical solutions:

[0005] A high energy efficiency intelligent control switching power supply system, comprising:

[0006] Switching power supply BD1: used to convert the main AC power into the DC voltages required by the circuit and provide power for each functional module;

[0008] PWM control chip U2: used to receive power from the switching power supply BD1 and generate a PWM signal for regulating and controlling power conversion;

[0010] VCC voltage stabilizing unit: used to receive power from the switching power supply BD1, and further stabilize the voltage through its internal voltage stabilizing element, and then supply the stabilized voltage to U2 and the light strip voltage intelligent control unit. The voltage stabilizing element includes a voltage stabilizing diode ZD1 and a transistor Q2;

[0011] Light back-flash protection unit: used to receive the voltage from the VCC voltage regulator unit, and ensure that the current output by the VCC voltage regulator unit will not flicker due to fluctuations in the AC power supply through diodes D9 and D8;

[0012] High voltage clamping circuit: including connecting the VS pin of the PWM control chip U2 with a voltage regulator diode ZD2 in series to the ground to form a clamping circuit;

[0013] Low voltage clamping circuit: including a constant power clamping circuit formed by connecting a voltage stabilizing diode ZD3 and a resistor R13 in series at the FB pin of the PWM control chip U2 and then connecting them in parallel with the receiving end of the photocoupler;

[0014] Power supply voltage stabilization unit: used to receive power from BD1, and use transistors Q6, Q7, voltage stabilization diodes ZD5, ZD6 to further stabilize the power supply, ensure that the voltage is stably output within a specific range, and supply it to the lamp strip voltage intelligent control unit;

[0015] Light strip voltage intelligent control unit (6): used to automatically identify the voltage of the connected LED light strip through the MCU chip U1, and adjust the output to match the identified voltage through the transistor Q3;

[0016] Signal conversion unit: uses the PWM signal from the PWM control chip U2 to perform level conversion through transformers T1D, T2D, and T3D to adapt the signal to the output requirements of different voltage levels;

[0017] Over-temperature protection unit: used to monitor the temperature of the circuit through the temperature sensor NTC2, and reduce the power output by adjusting P2 when the temperature is too high;

[0018] Overcurrent compensation unit: used to set the voltage threshold through the voltage zener diode ZD4. When the current in the circuit exceeds the safe value, the voltage rise is limited, and the resistor R21 is used as a voltage divider element;

[0019] Indicator circuit unit: used to switch different output voltages through switch SW1, and indicate the corresponding voltage through LED1-4, so as to help users identify the voltage level of the current circuit operation.

[0020] Preferably, the MCU chip U1 is a microcontroller with A / D conversion, and the MCU chip U1 samples the voltage signal through the RS terminal and performs A / D conversion internally;

[0021] The MCU chip U1 has a built-in comparison reference voltage. The sampled voltage is judged by a preset software algorithm to automatically identify the voltage of the connected light strip. The MCU chip U1 sets a power-on sequence: 12V-24V-36V-48V, and the default value is 12V.

[0022] When the MCU chip U1 recognizes the specific voltage of the light strip, it automatically adjusts the output voltage to match the voltage of the light strip and saves the setting. At the next startup, the MCU chip U1 will maintain this setting, and its DRIVE pin will switch from high level to low level, activating Q5 and suspending sampling at the RS end;

[0023] When the output voltage needs to be adjusted, the MCU chip U1 adjusts the output voltage step by step according to the sampled voltage signal strength until a voltage matching the light strip is found;

[0024] If the MCU chip U1 cannot obtain the sampled voltage signal at the RS end within 3 seconds, it is considered to be without load. At this time, the MCU chip U1 does not perform voltage judgment and adjustment.

[0025] Preferably, the signal conversion unit amplifies the driving signal output by the Gate pin of the PWM control chip U2 to drive T3D, and uses the T1D and T2D windings to induce the secondary voltage of the same phase to control the simultaneous opening and closing of Q1 and Q4.

[0026] Preferably, a driving signal amplifying unit is further included, which is used to receive the PWM signal generated by the PWM control chip U2 and amplify the PWM signal through transistors Q5 and Q8.

[0027] Preferably, a dual transformer series-parallel unit is further included, and the dual transformer series-parallel circuit specifically comprises transformer T1 and transformer T2 with a primary-side series connection and a secondary-side parallel connection architecture.

[0028] Preferably, a double-tube switch unit is further included, wherein the double-tube switch circuit uses transistor Q1 and transistor Q4 as main switch elements for turning on or off the power flow.

[0029] Preferably, a dual synchronous rectification unit is further included, and the dual synchronous rectification unit is used to configure the diodes D14, D15, D1, and D17 into two pairs of reverse parallel connections for rectification, allowing current to flow in one direction while preventing reverse current.

[0030] The beneficial effects of the present invention are as follows: the energy conversion efficiency is optimized by using advanced PWM technology and synchronous rectification technology, energy loss is reduced, and the overall system efficiency is improved. This not only saves energy, but also reduces damage and energy consumption caused by overheating. The voltage requirements of the connected device are automatically identified through the built-in microcontroller (MCU), and the output voltage is automatically adjusted to match different load requirements. This intelligent adjustment function ensures that the power supply system can be applied to a variety of devices while protecting the devices from inappropriate voltages. Including overcurrent compensation circuits, high voltage clamps and low voltage clamps, all of which are to protect the system from abnormal voltages and currents. In addition, the overtemperature power reduction unit can automatically reduce the output power when the system is overheated, further improving the safety of the system. By adopting a dual-transformer series-parallel circuit and a dual-tube switch circuit, the stability and reliability of the power supply are enhanced. These designs can handle higher load requirements while providing redundancy functions when components fail to ensure continuous operation of the system. The indicator circuit unit displays different voltage levels through LEDs of different colors, allowing users to intuitively see the working status of the system, facilitating monitoring and necessary maintenance. The system design allows for easy expansion or modification to accommodate new applications or enhanced functionality, such as adding new monitoring and control functions through software updates, allowing the system to adapt to future technological developments. Highly efficient energy conversion reduces power waste and heat release, thereby reducing environmental impact. In addition, intelligent control also reduces equipment operating time, further reducing energy consumption.

[0031] The present invention realizes the output of four conventional typical voltages (12V, 24V, 36V, 48V) through a switching power supply system, providing a wide range of application flexibility. This design enables the same power supply to adapt to a variety of electrical equipment, especially in the LED lighting industry, and can be compatible with lamps with different voltage requirements, greatly reducing user costs and equipment complexity.

[0032] The specially designed power supply system can keep the input power constant between 1.0-1.5 times the rated power under a wide voltage output state. This power control not only ensures the efficient operation of the power supply, but also optimizes energy consumption, reduces energy waste, and improves the stability and safety of the system.

[0035] Combining the design of hardware circuits and software programs, this patent realizes visual switching of multiple different output voltages. Through the user-friendly interface, users can intuitively select and switch voltage outputs, increasing the convenience and experience of operation. This interactive design is particularly suitable for application environments that require frequent voltage adjustment or power status monitoring.

[0036] Through intelligent control technology, the system can automatically identify the voltage of the connected LED light strip and adapt the corresponding output voltage to prevent the light strip from burning out due to misoperation. This not only protects the connected equipment, but also reduces the property loss that users may face, and improves the reliability of the entire system and the trust of users.

[0037] The entire solution significantly improves the performance and reliability of the power system by integrating high efficiency, intelligence, safety and other functions, while also providing a good user experience and environmental benefits. This makes the system very suitable for modern high-demand electronic and electrical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following briefly introduces the drawings required for use in the embodiment:

[0039] Figure 1 This is a circuit structure diagram of a high energy efficiency intelligent control switching power supply system according to a first embodiment of the present invention;

[0040] Figure 2 is a circuit structure diagram of a high energy efficiency intelligent control switching power supply system according to a second embodiment of the present invention;

[0041] Figure 3 It is a circuit structure diagram of a high energy efficiency intelligent control switching power supply system according to the third embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the technical purpose, technical solution and beneficial effects of the present invention clearer, the technical solution of the present invention is further described below in conjunction with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0043] Embodiment 1

[0044] The energy-efficient intelligent control switching power supply system of the preferred embodiment of the present invention is as follows Figure 1 As shown, the switching power supply system of this embodiment has a load of less than 150W, and includes a high-efficiency intelligent control switching power supply system, including:

[0045] Switching power supply BD1: used to convert the main AC power into the DC voltages required by the circuit and provide power for each functional module;

[0047] PWM control chip U2: used to receive power from the switching power supply BD1 and generate a PWM signal for regulating and controlling power conversion;

[0048] VCC voltage stabilizing unit 1: used to receive power from the switching power supply BD1, further stabilize the voltage through its internal voltage stabilizing element, and then supply the stabilized voltage to U2 and the light strip voltage intelligent control unit. The voltage stabilizing element includes a voltage stabilizing diode ZD1 and a transistor Q2;

[0049] Zener diode ZD1 is used to provide an accurate reference voltage and protect the circuit from overvoltage. It allows current to flow in the reverse direction when the voltage exceeds its threshold, thereby limiting the voltage rise and keeping the voltage stable. Transistor Q2 is used to control the current passing through it, thereby helping to maintain the stability of the output voltage. It can be used to regulate the load current and provide higher power supply stability. Resistor R6 is used to set the bias conditions of transistor Q2, helping to stabilize the operating point of the transistor so that it works in the best condition, thereby effectively controlling the output voltage. Capacitors C6 and C7 are used to filter and remove noise on the power line to ensure that the output voltage is smooth and without fluctuations. This is essential to ensure the normal operation of other parts of the circuit.

[0050] The VCC voltage regulator unit receives the input voltage from the switching power supply BD1. One end of ZD1 is connected to the output of transistor Q2, and the other end is connected to the common ground (GND), providing a stable voltage reference for the circuit. The base of transistor Q2 is connected to the input voltage source (VCC from BD1) through resistor R6, its emitter is connected to the common ground, and the collector provides a stable output voltage. Capacitor C6 is connected between the output of transistor Q2 and ground, and capacitor C7 is connected between diode D7 and ground to help eliminate any voltage fluctuations caused by load changes.

[0051] Lamp back-flash protection unit 2: used to receive the voltage from the VCC voltage stabilizing unit, and ensure that the current output by the VCC voltage stabilizing unit will not flicker due to the fluctuation of the AC power supply through diodes D9 and D8;

[0052] The anode of diodes D9 and D8 is connected to the output load, and the cathode is connected to the output of the VCC voltage regulator unit. It is used to prevent the reverse flow of current, which helps to stabilize the current and reduce the light flickering caused by input voltage fluctuations. To prevent any interference caused by the power supply end from affecting the lamp. The lamp backflash protection unit receives power directly from the VCC voltage regulator unit, and the stable voltage output by the VCC voltage regulator unit is used as the input of the lamp backflash protection circuit.

[0053] High voltage clamp circuit 3: It includes a voltage regulator diode ZD2 connected in series to the ground at the VS pin of the PWM control chip U2 to form a clamp circuit; ZD2 is used to set the highest voltage threshold of the clamp circuit. When the voltage of the circuit exceeds the rated voltage of ZD2, it will begin to conduct electricity, thereby "clamping" the excess voltage to prevent the voltage from rising further. One end of ZD2 is connected to the VS pin of the PWM control chip U2. The other end of ZD2 is connected to the ground wire to form a loop. In this way, when the voltage exceeds the voltage regulation value of ZD2, the excess voltage will be introduced into the ground wire, thereby limiting the voltage increase.

[0054] Low voltage clamp circuit 4: includes a constant power clamp circuit formed by connecting a voltage regulator diode ZD3 and a resistor R13 in series at the FB pin of the PWM control chip U2 and then connecting them in parallel with the receiving end of the photocoupler; the voltage regulator diode ZD3 is used to set the minimum voltage threshold of the clamp circuit. The resistor R13 is used to limit the current flowing through ZD3, protect ZD3 from high current damage, and help stabilize the performance of the clamp circuit. The low voltage clamp circuit can also be provided with a photocoupler, which is connected in parallel in the circuit of ZD3. The photocoupler is used to provide voltage feedback to help the control system adjust and respond to voltage changes more accurately. One end of ZD3 is connected to the FB pin of the PWM control chip U2 through the resistor R13. The other end of ZD3 is connected in parallel to the receiving end of the photocoupler, and the entire assembly is finally connected to the ground wire. The resistor R13 is used to connect ZD3 and the FB pin of U2 to limit the current and distribute the voltage to ensure the stable operation of the circuit. In general, the low voltage clamping circuit of the present invention is a constant power clamping circuit formed by using a voltage regulator diode or a resistor, or a voltage regulator diode and a resistor in series and then connected in parallel with the receiving end of the photoelectric coupler, at the FB pin (voltage feedback control) of the PWM control chip, or at the photoelectric receiving end of the photoelectric coupler.

[0055] Power supply voltage stabilizing unit 5: used to receive power from BD1, and use transistors Q6, Q7, voltage stabilizing diodes ZD5, ZD6 to further stabilize the power supply, ensure that the voltage is stably output within a specific range, and supply it to the lamp strip voltage intelligent control unit;

[0056] Transistors Q6 and Q7 are used to regulate and control the current passing through them, thereby maintaining a stable output voltage. In the power supply voltage regulator unit, they are used as part of a linear regulator, or as a switching regulator in a switch mode power supply. Zener diodes ZD5 and ZD6 are used to set the maximum threshold of the output voltage to prevent the voltage from exceeding the set safety level. They play a key protective role in the circuit. Resistors R18 and R19 are used to provide appropriate bias voltages for the transistors, help control the switching action of the transistors, and limit the current through the transistors to ensure stable operation of the circuit.

[0057] The power supply voltage regulator unit receives the input voltage from the switching power supply BD1. BD1 converts the main AC power to a DC voltage suitable for the circuit. The bases of transistors Q6 and Q7 are connected to the input voltage source through resistors R18 and R19 respectively. This connection helps the transistors switch stably and control the current flow. The emitters of Q6 and Q7 are connected to the ground (negative power supply), while the collectors are connected to the output terminal to provide a regulated and stable voltage. Zener diodes ZD5 and ZD6 are connected between the output terminal of the transistors and the ground to ensure that the output voltage does not exceed their voltage regulation threshold. When the voltage exceeds this threshold, ZD5 and ZD6 begin to conduct and direct the excess voltage to the ground, thereby protecting the circuit. Resistors R18 and R19 are used to set the switching threshold of the transistors. One end of them is connected to the input voltage source and the other end is connected to the base of the transistor. By adjusting the resistance value of resistors R18 and R19, the behavior of the transistors can be accurately controlled, thereby finely adjusting the output voltage.

[0058] Light strip voltage intelligent control unit 6: used to automatically identify the voltage of the connected LED light strip through the MCU chip U1, and adjust the output to match the identified voltage through the transistor Q3;

[0059] Signal conversion unit 7: uses the PWM signal from the PWM control chip U2 to perform level conversion through transformers T1D, T2D, and T3D to adapt the signal to the output requirements of different voltage levels;

[0060] Transformers T1D, T2D, and T3D are used for isolation and level conversion of electrical signals. They receive low-voltage, low-current control signals from the control chip and convert them into high-voltage, high-current signals suitable for high-power loads. The use of transformers also helps prevent interference or noise on the high-voltage side from affecting the low-voltage control circuit. Diodes D6, D13, and D14 are used for signal rectification or protection to ensure the unidirectionality of signal transmission and prevent potential reverse voltage from damaging the control circuit. Capacitor C8 is used for signal filtering to remove high-frequency noise that may be generated during the conversion process, thereby ensuring the smoothness and stability of the output signal.

[0061] The control signal is first input to transformers T1D, T2D and T3D. The control signal often comes from the PWM control chip U2, which is responsible for providing a modulation signal for driving the load. The primary side of the transformer is connected to the control signal source (such as U2), and the secondary side is connected to the output end to provide it to the high-voltage or high-power device that needs to be driven. The function of the transformer is to convert the low-level PWM signal into a high-level drive signal, while achieving electrical isolation to prevent high voltage feedback to the low-voltage control system. Diodes D6, D13, and D14 are installed on the output path of the secondary side of the transformer to rectify the output signal and ensure the correct flow of the signal. Capacitor C8 is connected after the secondary side output of the transformer to filter, smooth the output signal, and reduce noise.

[0062] 10) The existing single-tube flyback topology switching power supply cannot achieve an output power greater than 200W; by amplifying the drive signal output from the 6th foot of U2, to drive the T3D winding, according to the law of electromagnetic induction, the turns ratio and phase are the same, and the secondary voltage of the same phase is induced in the T1D and T2D windings to control the simultaneous opening and closing of Q1 and Q4.

[0063] Over-temperature protection unit 8: used to monitor the temperature of the circuit through the temperature sensor NTC2, and reduce the power output by adjusting P2 when the temperature is too high;

[0064] Overcurrent compensation unit 9: used to set a voltage threshold through the voltage zener diode ZD4, limit the voltage rise when the current in the circuit exceeds the safe value, and use the resistor R21 as a voltage divider element;

[0065] Indicator circuit unit 10: used to switch different output voltages through switch SW1, and indicate the corresponding voltage through LED1-4, so as to help the user identify the voltage level of the current circuit operation.

[0066] The working principle of the lamp strip voltage intelligent control unit 6 is:

[0067] 1) Using MCU chip U1 with A / D conversion, under light load conditions, MCU chip U1 samples the voltage signal from both ends of RS and sends it to the internal A / D signal conversion. A comparison reference voltage is set inside MCU chip U1 and judgment is made through software algorithm;

[0068] 2) MCU chip U1 sets a power-on sequence: 12V-24V-36V-48V, the default value is 12V;

[0069] 3) If the output is connected to a 12V light strip, after the MCU chip U1 samples the RS signal, the software will automatically perform a loop algorithm to determine that the output voltage matches the light strip voltage. The MCU chip U1 will automatically switch the output voltage to the matching load voltage and save the settings. The current settings will be maintained at the next startup. At the same time, the DRIVE pin automatically changes from a high level to a low level, Q5 is turned on, and there is no RS sampling signal.

[0070] 4) The output is connected to a 24V light strip. The program starts from the 12V default state until the RS pin has a sampling signal for the first time. The MCU chip U1 will automatically switch the output voltage to the matching load voltage and save the setting based on the first signal. The current setting will be maintained at the next startup. At the same time, the DRIVE pin automatically changes from a high level to a low level, Q5 is turned on, and there is no RS sampling signal.

[0071] 5) The output is connected to a 36V or 48V light strip, and the automatic identification logic refers to step 3 or 4;

[0072] 6) When the 12V light strip is connected to the 48V output, the recognition logic is that when the MCU chip U1 samples the signal from RS, it automatically starts the power-on voltage output timing. When the RS signal is sampled to be weak, the program runs a gear to match the corresponding output voltage. The MCU will automatically switch the output voltage to the matching load voltage and save the setting, and keep the current setting at the next startup. At the same time, the DRIVE pin automatically changes from a high level to a low level, Q5 is turned on, and there is no RS sampling signal;

[0073] 7) When the 36V output is connected to a 12V light strip or other voltage ranges, the automatic identification logic refers to step 6;

[0074] 8) When the MCU chip U1 fails to sample a signal within 3S at the RS end, it is considered as no-load and the program will not make any identification judgment.

[0075] like Figure 1 As shown, the MCU chip U1 is a microcontroller with A / D conversion. The MCU chip U1 samples the voltage signal through the RS terminal and performs A / D conversion internally;

[0076] The MCU chip U1 has a built-in comparison reference voltage. The sampled voltage is judged by a preset software algorithm to automatically identify the voltage of the connected light strip. The MCU chip U1 sets a power-on sequence: 12V-24V-36V-48V, and the default value is 12V.

[0077] When the MCU chip U1 recognizes the specific voltage of the light strip, it automatically adjusts the output voltage to match the voltage of the light strip and saves the setting. At the next startup, the MCU chip U1 will maintain this setting, and its DRIVE pin will switch from high level to low level, activating Q5 and suspending sampling at the RS end;

[0078] When the output voltage needs to be adjusted, the MCU chip U1 adjusts the output voltage step by step according to the sampled voltage signal strength until a voltage matching the light strip is found;

[0079] If the MCU chip U1 cannot obtain the sampled voltage signal at the RS end within 3 seconds, it is considered to be without load. At this time, the MCU chip U1 does not perform voltage judgment and adjustment.

[0080] like Figure 1 As shown, the signal conversion unit amplifies the driving signal output by the Gate pin of the PWM control chip U2 and drives T3D, and uses the T1D and T2D windings to induce the secondary voltage of the same phase to control the simultaneous opening and closing of Q1 and Q4.

[0081] The present invention uses advanced PWM technology and synchronous rectification technology to optimize energy conversion efficiency, reduce energy loss, and improve overall system efficiency. This not only saves energy, but also reduces damage and energy consumption caused by overheating. The built-in microcontroller (MCU) can automatically identify the voltage requirements of the connected device and automatically adjust the output voltage to match different load requirements. This intelligent adjustment function ensures that the power supply system can be applied to a variety of devices while protecting the devices from inappropriate voltages. Including overcurrent compensation circuits, high voltage clamps and low voltage clamps, all of which are to protect the system from abnormal voltages and currents. In addition, the overtemperature power reduction unit can automatically reduce the output power when the system is overheated, further improving the safety of the system. The stability and reliability of the power supply are enhanced by adopting a dual-transformer series-parallel circuit and a dual-tube switch circuit. These designs can handle higher load requirements while providing redundancy functions when components fail to ensure continuous operation of the system. The indicator circuit unit displays different voltage levels through LEDs of different colors, allowing users to intuitively see the working status of the system, facilitating monitoring and necessary maintenance. The system design allows for easy expansion or modification to accommodate new applications or enhanced functionality, such as adding new monitoring and control functions through software updates, allowing the system to adapt to future technological developments. Highly efficient energy conversion reduces power waste and heat release, thereby reducing environmental impact. In addition, intelligent control also reduces equipment operating time, further reducing energy consumption.

[0082] The present invention realizes the output of four conventional typical voltages (12V, 24V, 36V, 48V) through a switching power supply system, providing a wide range of application flexibility. This design enables the same power supply to adapt to a variety of electrical equipment, especially in the LED lighting industry, and can be compatible with lamps with different voltage requirements, greatly reducing user costs and equipment complexity.

[0083] The specially designed power supply system can keep the input power constant between 1.0-1.5 times the rated power under a wide voltage output state. This power control not only ensures the efficient operation of the power supply, but also optimizes energy consumption, reduces energy waste, and improves the stability and safety of the system.

[0084] Combining the design of hardware circuits and software programs, this patent realizes visual switching of multiple different output voltages. Through the user-friendly interface, users can intuitively select and switch voltage outputs, increasing the convenience and experience of operation. This interactive design is particularly suitable for application environments that require frequent voltage adjustment or power status monitoring.

[0085] Through intelligent control technology, the system can automatically identify the voltage of the connected LED light strip and adapt the corresponding output voltage to prevent the light strip from burning out due to misoperation. This not only protects the connected equipment, but also reduces the property loss that users may face, and improves the reliability of the entire system and the trust of users.

[0086] The entire solution significantly improves the performance and reliability of the power system by integrating high efficiency, intelligence, safety and other functions, while also providing a good user experience and environmental benefits. This makes the system very suitable for modern high-demand electronic and electrical applications.

[0087] Embodiment 2

[0088] The energy-efficient intelligent control switching power supply system of the preferred embodiment of the present invention is as follows Figure 2 As shown, the load of the switching power supply system of this embodiment is 200W-300W.

[0089] This embodiment is similar to the previous embodiment except that it further includes a driving signal amplifying unit 11 for receiving a PWM signal generated by the PWM control chip U2 and amplifying the PWM signal through transistors Q5 and Q8.

[0090] Transistors Q5, Q8 are used to amplify the signal received from the PWM control chip U2. Transistors Q5 and Q8 can be field effect transistors (FETs) or bipolar junction transistors (BJTs), the specific type depending on the required drive capability and system design. Resistors can also be set to set the bias conditions of the transistors and limit the current through the transistors, thereby protecting the transistors from overload and ensuring stable amplification behavior.

[0091] The control signal is output from the PWM control chip U2 and first reaches the base (if BJT is used) or gate (if FET is used) of transistors Q5 and Q8.

[0092] Transistor connection:

[0093] Base or Gate: Connected to the output of the PWM chip through resistors of certain value. These resistors help to form the appropriate drive voltage and current to drive the transistor.

[0094] Collector or Drain: Connected between the load and the power supply, controls the load according to the switching state of the transistor.

[0095] Emitter or Source: Usually connected to system ground to ensure a good current return path.

[0096] Output: The output is derived from the collector or drain of the transistor and leads to a high-power load. Before connecting to the load, it may also pass through additional resistors or other components to adjust the final output signal characteristics.

[0097] The main function of the drive signal amplifier unit is to enhance the signal sent from the control unit (such as a PWM control chip). Without the use of an amplifier unit, the signal may not be enough to fully activate a high-power load. The introduction of transistors or other amplifiers can amplify these weaker signals to a level sufficient to drive higher power loads. This means that larger currents and voltages can be controlled, thereby handling higher powers. By using transistors such as MOSFETs or BJTs to amplify the signal, faster switching speeds and higher switching efficiency can be achieved. This improved switching performance reduces energy losses during the switching process, allowing the system to operate at higher power levels without overheating or damage. Fast and precise switching also helps optimize the efficiency of the entire power supply, which can support greater output power. The addition of a drive signal amplifier unit ensures that the transistor operates in its optimal on and off states, which reduces the conduction loss when in a partially on state (that is, a state where the transistor is neither fully on nor fully off). More efficient driving means less energy is wasted as heat, improving the system's ability to handle high power.

[0098] Embodiment 3

[0099] The energy-efficient intelligent control switching power supply system of the preferred embodiment of the present invention is as follows Figure 3 As shown, the load of the switching power supply system of this embodiment is within 400W. This embodiment is similar to the previous embodiment, except that it also includes a dual transformer series-parallel unit 12, a dual-tube switch unit 13 and a synchronous rectification unit 14, wherein:

[0100] The dual transformer series-parallel circuit specifically adopts a transformer T1 and a transformer T2 with a primary-side series connection and a secondary-side parallel connection architecture.

[0101] Transformers T1 and T2 are used for voltage conversion and isolation. In the power supply system, they adapt to different output requirements by adjusting the voltage level, while providing isolation between input and output to enhance the safety of the system. The primary side (input side) of T1 and T2 are connected in series, which allows the transformer to withstand higher input voltages and share loads. The secondary side (output side) is connected in parallel, and this configuration can increase the output current capacity, allowing the system to drive larger loads. The dual-tube switch circuit uses transistor Q1 and transistor Q4 as the main switching elements to turn on or off the power flow.

[0102] Transistors Q1, Q4 are used as switching elements to control the current path in the power system. In high-power applications, using two transistors can provide greater current carrying capacity and better thermal management. The collector (or drain, if it is a MOSFET) of transistor Q1, Q4 is connected to the input or output of transformer T1, T2, and the base (or gate) receives the drive signal from the control unit. The emitter (or source) of the transistor is grounded. This configuration allows the transistor to switch quickly when it receives the appropriate drive signal.

[0103] The dual synchronous rectification unit is used to configure diodes D14, D15, D1, and D17 as two pairs connected in reverse parallel for rectification, allowing current to flow in one direction while blocking reverse current.

[0104] The dual synchronous rectification unit is a circuit composed of capacitor C1, resistor R1, diodes D14, D15, resistor R39, capacitor C19, diodes D16, D17, and is used to rectify high-frequency AC signals to provide a more stable DC output.

[0105] Capacitors C1 and C19 are used to filter and stabilize the output voltage, removing voltage spikes generated by the rectification process to ensure a smoother output. Resistors R1 and R39 are used to limit current, helping to control the flow of current in the circuit and protecting the circuit from running safely. Diodes D14 and D15 are configured as a pair in reverse parallel, and similarly D16 and D17 are also in reverse parallel. This setup is used for rectification, allowing current to flow in one direction while blocking reverse current, thereby converting alternating current (AC) input to direct current (DC) output.

[0106] The input power signal may first pass through capacitor C1 for preliminary filtering and then enter the array of rectifier diodes. Diodes D14 and D15 are configured together to form half of a rectifier bridge, and D16 and D17 form the other half. This rectifier bridge structure is to efficiently extract DC output from AC input. Capacitor C19 performs further filtering at the output of the rectifier bridge. Resistors R1 and R39 are used for current limiting.

[0107] The series configuration of transformers T1 and T2 allows the system to withstand higher input voltages, while the parallel configuration provides greater output current. This combination optimizes the regulation of voltage and current, allowing the system to flexibly respond to greater power demands. The use of transistors Q1 and Q4 allows the current passing through each transistor to be shared, reducing the thermal burden of individual components and improving overall switching efficiency and reliability. This not only increases the maximum power carrying capacity of the system, but also improves the durability and stability of the system. The dual synchronous rectifier unit is able to effectively convert AC power into stable DC power while minimizing voltage fluctuations and noise, improving the overall efficiency and reliability of the power system.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate but not limit the technical solutions of the present invention, and any equivalent substitutions of the present invention and any modifications or partial substitutions that do not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A high-efficiency intelligent control switching power supply system, characterized in that: include: Switching power supply BD1: used to convert the main AC power into the DC voltages required by the circuit and provide power for each functional module; PWM control chip U2: used to receive power from the switching power supply BD1 and generate a PWM signal for regulating and controlling power conversion; VCC voltage stabilizing unit (1): used to receive power from the switching power supply BD1, further stabilize the voltage through its internal voltage stabilizing element, and then supply the stabilized voltage to U2 and the light strip voltage intelligent control unit, wherein the voltage stabilizing element includes a voltage stabilizing diode ZD1 and a transistor Q2; Light flashback prevention unit (2): used to receive the voltage from the VCC voltage stabilizing unit and ensure that the current output by the VCC voltage stabilizing unit will not flicker due to fluctuations in the AC power supply through diodes D9 and D8; High voltage clamping circuit (3): including a clamping circuit formed by connecting a voltage regulator diode ZD2 in series to ground at the VS pin of the PWM control chip U2; Low voltage clamp circuit (4): comprising a constant power clamp circuit formed by connecting a voltage stabilizing diode ZD3 and a resistor R13 in series at the FB pin of the PWM control chip U2 and then connecting them in parallel with the receiving end of the photocoupler; Power supply stabilizing unit (5): used to receive power from BD1, and use transistors Q6, Q7, and voltage stabilizing diodes ZD5, ZD6 to further stabilize the power supply, ensure that the voltage is stably output within a specific range, and supply it to the lamp strip voltage intelligent control unit; Light strip voltage intelligent control unit (6): used to automatically identify the voltage of the connected LED light strip through the MCU chip U1, and adjust the output to match the identified voltage through the transistor Q3; Signal conversion unit (7): uses the PWM signal from the PWM control chip U2 to perform level conversion through transformers T1D, T2D, and T3D, so that the signal adapts to the output requirements of different voltage levels; Over-temperature protection unit (8): used to monitor the temperature of the circuit through the temperature sensor NTC2, and reduce the power output by adjusting P2 when the temperature is too high; Overcurrent compensation unit (9): used to set a voltage threshold through the voltage stabilizing diode ZD4, limit the voltage rise when the current in the circuit exceeds the safe value, and use the resistor R21 as a voltage divider element; Indicator circuit unit (10): used to switch different output voltages through switch SW1, and indicate corresponding voltages through LEDs 1-4, so as to help users identify the voltage level of the current circuit operation.

2. The high energy efficiency intelligent control switching power supply system according to claim 1 is characterized in that: The MCU chip U1 is a microcontroller with A / D conversion. The MCU chip U1 samples the voltage signal through the RS terminal and performs A / D conversion internally; The MCU chip U1 has a built-in comparison reference voltage. The sampled voltage is judged by a preset software algorithm to automatically identify the voltage of the connected light strip. The MCU chip U1 sets a power-on sequence: 12V-24V-36V-48V, and the default value is 12V. When the MCU chip U1 recognizes the specific voltage of the light strip, it automatically adjusts the output voltage to match the voltage of the light strip and saves the setting. At the next startup, the MCU chip U1 will maintain this setting, and its DRIVE pin will switch from high level to low level, activating Q5 and suspending sampling at the RS end; When the output voltage needs to be adjusted, the MCU chip U1 adjusts the output voltage step by step according to the sampled voltage signal strength until a voltage matching the light strip is found; If the MCU chip U1 cannot obtain the sampled voltage signal at the RS end within 3 seconds, it is considered to be without load. At this time, the MCU chip U1 does not perform voltage judgment and adjustment.

3. The high energy efficiency intelligent control switching power supply system according to claim 2 is characterized in that: The signal conversion unit amplifies the driving signal output by the Gate pin of the PWM control chip U2 and drives T3D, and uses the T1D and T2D windings to induce the secondary voltage of the same phase to control the simultaneous opening and closing of Q1 and Q4.

4. The high energy efficiency intelligent control switching power supply system according to claim 1, characterized in that: It also includes a driving signal amplifying unit (11), which is used to receive the PWM signal generated by the PWM control chip U2 and amplify the PWM signal through transistors Q5 and Q8.

5. The high energy efficiency intelligent control switching power supply system according to claim 1, characterized in that: It also includes a dual transformer series-parallel unit (12), wherein the dual transformer series-parallel circuit specifically comprises a transformer T1 and a transformer T2 that adopt a primary-side series connection and a secondary-side parallel connection architecture.

6. The high-efficiency intelligent control switching power supply system according to claim 1, characterized in that: It also includes a double-tube switch unit (13), wherein the double-tube switch circuit uses transistor Q1 and transistor Q4 as main switch elements for turning on or off the power flow.

7. The high energy efficiency intelligent control switching power supply system according to claim 1, characterized in that: It also includes a dual synchronous rectification unit (14), which is used to configure diodes D14, D15, D1, and D17 into two pairs of reverse parallel connections for rectification, allowing current to flow in one direction while blocking reverse current.

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