Multi-frequency power supply device

Abstract

The utility model discloses a kind of multiple frequency conversion power supply devices, it is related to intelligent power supply technical field, including high-frequency boost circuit, main control circuit, light control film drive circuit and voltage reduction circuit;The high-frequency boost circuit is with high-frequency switch mode to low voltage direct current signal boost as high voltage direct current signal, and the high voltage direct current signal is output to light control film drive circuit to supply power to the light control film drive circuit;The main control circuit is with control signal output to the light control film drive circuit;The light control film drive circuit is with low-frequency switch mode to the high voltage direct current signal conversion as high voltage alternating current signal according to the control signal, and the high voltage alternating current signal is output to light control film;The voltage reduction circuit is connected with light control film drive circuit, for converting the high voltage alternating current signal as low voltage direct current signal to charge power supply.The utility model uses multistage frequency conversion technology, realizes small size, high-efficiency boost energy conversion, to realize multidimensional high-efficiency power supply.

Description

Technical Field

[0001] This utility model relates to the field of intelligent power supply technology, and in particular to a multi-frequency conversion power supply device. Background Technology

[0002] In existing technologies, the electrical energy generated by solar panels is typically represented as a low-voltage DC signal. Traditional charging methods often involve directly connecting these low-voltage DC signals to an energy storage power source (such as a battery) for charging. While this direct charging method has a simple circuit structure and low cost, it lacks the ability to actively adjust the output state of the solar panel, easily leading to a significant waste of available solar energy and resulting in low overall energy harvesting efficiency.

[0003] Meanwhile, when powering the smart dimming film (PDLC film, polymer dispersed liquid crystal film) through solar panels, single-frequency conversion technology is mainly used. Among them, the low-frequency boost mode inevitably brings the disadvantages of large size and high power; while the high-frequency boost mode can only generate DC high voltage and cannot directly power the dimming film.

[0004] Therefore, it is necessary to develop a new type of solar power supply device to achieve multi-dimensional and efficient power supply. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a multi-frequency conversion power supply device that can achieve small size and high efficiency boost energy conversion.

[0006] To address the aforementioned technical problems, this utility model provides a multi-frequency conversion power supply device, comprising: a high-frequency boost circuit, a main control circuit, a dimming film driving circuit, and a buck circuit; the high-frequency boost circuit is connected to the dimming film driving circuit, and the high-frequency boost circuit boosts the low-voltage DC signal from an external power source into a high-voltage DC signal using a high-frequency switching method, and outputs the high-voltage DC signal to the dimming film driving circuit to supply power to the dimming film driving circuit; the main control circuit is connected to the dimming film driving circuit, and the main control circuit outputs a control signal to the dimming film driving circuit; the dimming film driving circuit converts the high-voltage DC signal into a high-voltage AC signal using a medium-low frequency switching method according to the control signal, and outputs the high-voltage AC signal to the dimming film; the buck circuit is connected to the dimming film driving circuit and is used to convert the high-voltage AC signal into a low-voltage DC signal to charge the power source.

[0007] As an improvement to the above scheme, in the high-voltage AC signal output by the dimming film driving circuit, the switching frequency during the commutation period is greater than the switching frequency during the sustain period.

[0008] As an improvement to the above scheme, the high-frequency switching mode of the high-frequency boost circuit has a frequency of 200KHz~2MHz, and / or the low-frequency switching mode of the dimming film driving circuit has a frequency of 50Hz~60Hz.

[0009] As an improvement to the above scheme, the control signal output by the main control circuit is a square wave control signal of 50Hz~60Hz.

[0010] As an improvement to the above scheme, the waveform of the high-voltage AC signal output by the dimming film driving circuit includes a rising edge, an overshoot segment, a high-level segment, a falling edge, an undershoot segment, and a low-level segment arranged sequentially.

[0011] As an improvement to the above solution, the high-frequency boost circuit includes a BOOST boost module and a sampling module; the BOOST boost module is used to boost a low-voltage DC signal into a high-voltage DC signal in a high-frequency switching manner; the sampling module is connected to the BOOST boost module and is used to detect the sampling current and output the sampling current to the BOOST boost module to adjust the high-voltage DC signal output by the BOOST boost module.

[0012] As an improvement to the above solution, the high-frequency boost circuit includes a switching module, a transformer module, and a rectifier module. The switching module is connected to the main control circuit and the primary coil of the transformer module, respectively, and is used to adjust the on / off state according to the start signal of the main control circuit and the magnetic field energy of the primary coil. The secondary coil of the transformer module converts the low-voltage DC signal into a high-frequency AC pulse signal according to the on / off state of the switching module. The secondary coil of the transformer module is coupled to the primary coil to convert the high-frequency AC pulse signal into a high-voltage AC signal. The rectifier module is connected to the secondary coil and is used to process the high-voltage AC signal to output a high-voltage DC signal.

[0013] As an improvement to the above solution, the multi-frequency conversion power supply device further includes: a power supply voltage control circuit connected to the main control circuit and the high-frequency boost circuit respectively, used to output the low-voltage DC signal of the power supply to the high-frequency boost circuit according to the power control signal of the main control circuit, and to detect the voltage information of the power supply in real time; and a solar energy control circuit connected to the main control circuit, used to control the working status of the solar panel in real time, and to detect the charging current and voltage information of the solar panel in real time.

[0014] As an improvement to the above solution, the multi-frequency conversion power supply device further includes: an LDO voltage regulator circuit connected to the main control circuit, used to output the low-voltage DC signal of the power supply to the main control circuit to supply power to the main control circuit; an RF radio frequency circuit connected to the main control circuit, used to transmit radio frequency signals according to the radio frequency control signals output by the main control circuit; a lamp driver display circuit connected to the main control circuit, used to adjust the working state of the indicator light according to the LED control signals output by the main control circuit; and a button control circuit connected to the main control circuit, used to collect button signals and output the button signals to the main control circuit.

[0015] Implementing this utility model has the following beneficial effects:

[0016] This utility model's multi-frequency conversion power supply device employs a three-stage frequency conversion process. The first stage uses a high-frequency switching method (fixed frequency) to boost a low-voltage DC signal into a high-voltage DC signal, achieving a small size and high-efficiency boost energy conversion. The second stage uses a medium-low frequency switching method (variable frequency) to convert the high-voltage DC signal into a high-voltage AC signal, thereby providing precise, low-energy-consumption power to the dimming film. The third stage converts the high-voltage AC signal into a low-voltage DC signal to charge the power supply. This achieves multi-dimensional power supply to the dimming film and the power supply. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first embodiment of the multi-frequency conversion power supply device of this utility model;

[0018] Figure 2 This is an existing high-voltage AC signal waveform diagram;

[0019] Figure 3 This is a schematic diagram of the switching frequency of this utility model;

[0020] Figure 4 This is a waveform diagram of the high-voltage AC signal of this utility model;

[0021] Figure 5 This is a circuit diagram of the first embodiment of the high-frequency boost circuit of this utility model;

[0022] Figure 6 This is a circuit diagram of the second embodiment of the high-frequency boost circuit of this utility model;

[0023] Figure 7 This is a circuit diagram of an embodiment of the main control circuit in this utility model;

[0024] Figure 8 This is a circuit diagram of an embodiment of the dimming film driving circuit in this utility model;

[0025] Figure 9This is a schematic diagram of the second embodiment of the multi-frequency conversion power supply device of this utility model;

[0026] Figure 10 This is a circuit diagram of an embodiment of the power supply voltage control circuit in this utility model;

[0027] Figure 11 This is a circuit diagram of an embodiment of the solar energy control circuit in this utility model;

[0028] Figure 12 This is a schematic diagram of the third embodiment of the multi-frequency conversion power supply device of this utility model;

[0029] Figure 13 This is a circuit diagram of an embodiment of the LDO voltage regulator circuit in this utility model;

[0030] Figure 14 This is a circuit diagram of an embodiment of the RF radio frequency circuit in this utility model;

[0031] Figure 15 This is a circuit diagram of an embodiment of the lamp driver display circuit in this utility model;

[0032] Figure 16 This is a circuit diagram of an embodiment of the button control circuit in this utility model. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0034] See Figure 1 , Figure 1 This invention illustrates a first embodiment of the multi-frequency conversion power supply device 100, which includes a high-frequency boost circuit 1, a main control circuit 2, a dimming film drive circuit 3, and a buck circuit 4. Specifically:

[0035] The high-frequency boost circuit 1 is connected to the dimming film driving circuit 3. The high-frequency boost circuit 1 boosts the low-voltage DC signal from the external power supply to a high-voltage DC signal in a high-frequency switching manner, and outputs the high-voltage DC signal to the dimming film driving circuit 3 to supply power to the dimming film driving circuit 3.

[0036] The main control circuit 2 is connected to the dimming film driving circuit 3, and the main control circuit 2 outputs control signals to the dimming film driving circuit 3.

[0037] The dimming film driving circuit 3 converts the high-voltage DC signal into a high-voltage AC signal in a low-to-medium frequency switching manner according to the control signal, and outputs the high-voltage AC signal to the dimming film to control the working state of the dimming film.

[0038] The step-down circuit 4 is connected to the dimming film drive circuit 3 and is used to convert the high-voltage AC signal into a low-voltage DC signal to charge the power supply.

[0039] As can be seen from the above, the multi-frequency conversion power supply device 100 of this utility model adopts a three-stage frequency conversion processing method, wherein:

[0040] First-stage frequency conversion: The 3.3V low-voltage DC signal output by the power supply is boosted to a high-voltage DC signal using a high-frequency switching method (fixed frequency), achieving small size and high-efficiency boost energy conversion;

[0041] Second-stage frequency conversion: The high-voltage DC signal is converted into a high-voltage AC signal using a medium-low frequency switching method (variable frequency), thereby providing precise low-energy power to the dimming film;

[0042] The third stage of frequency conversion converts the high-voltage AC signal into a low-voltage DC signal to charge the power supply.

[0043] When in dimming mode, the first and second stage frequency converters output high-voltage AC signals to power the dimming film; when in non-dimming mode, the third stage frequency converter converts the high-voltage AC signal into a low-voltage DC signal to charge the power supply.

[0044] Furthermore, the frequency of the high-frequency switching mode is 200kHz~2MHz, and the frequency of the medium-low frequency switching mode is 50Hz~60Hz. Correspondingly, the control signal is a square wave control signal of 50Hz~60Hz.

[0045] It should be noted that during the commutation of a high-voltage AC signal, the crystal of the dimming film undergoes rapid field direction switching. Therefore, in the initial stage of electric field establishment, the polarity change period of the capacitive load requires more energy than the maintenance period. Consequently, the load on the dimming film becomes relatively large, resulting in a haze period of several milliseconds (i.e., low voltage), leading to a brief period of light blocking (approximately 3ms). While the human eye cannot perceive such a short light signal, this flicker can cause dizziness and eye damage. Therefore, if the high-voltage AC signal is maintained at a fixed voltage (see...),... Figure 2 This would lead to an inability to accurately reduce energy consumption.

[0046] Therefore, in the high-voltage AC signal of this invention, by adjusting the switching frequency, the switching frequency during the commutation period is made greater than the switching frequency during the sustaining period (see...). Figure 3This achieves energy compensation during commutation; ultimately, the waveform of the high-voltage AC signal includes, in sequence, a rising edge, an overshoot segment, a high-level segment, a falling edge, an undershoot segment, and a low-level segment (see...). Figure 4 This reduces the original 3ms light blocking time to less than 500µs, which greatly reduces eye damage and does not cause dizziness (normally, the human eye is insulated from light frequency signals above 500Hz and does not have any effect).

[0047] The following sections, using specific circuit diagrams, provide detailed explanations of the high-frequency boost circuit 1, the main control circuit 2, and the dimming film drive circuit 3:

[0048] I. High-frequency boost circuit

[0049] In one embodiment, the high-frequency boost circuit 1 includes a BOOST boost module and a sampling module, wherein:

[0050] The BOOST boost module is used to boost the low-voltage DC signal output by the power supply to a high-voltage DC signal using a high-frequency switching method;

[0051] The sampling module is connected to the BOOST boost module and is used to detect the sampling current and output the sampling current to the BOOST boost module to adjust the high-voltage DC signal output by the BOOST boost module.

[0052] like Figure 5 As shown, the high-frequency boost circuit 1 includes an MT3608 chip U6, a 28th resistor R28, a 33rd resistor R33, a 16th capacitor C16, a 17th capacitor C17, a 24th capacitor C24, a 4th diode D4, and a 9th inductor L9. The MT3608 chip U6 forms a BOOST boost module to boost the low-voltage DC signal output from the power supply to a high-voltage DC signal. The 28th resistor R28 and the 33rd resistor R33 are connected in series to form a sampling module. The voltage divider point of the sampling module is connected to the sampling terminal FB of the MT3608 chip U6 to output the sampling current to the BOOST boost module. One end of the 16th capacitor C16 is connected to a high-frequency... The output of boost circuit 1 is connected to ground at the other end to achieve voltage regulation. One end of the seventeenth capacitor C17 is connected to the enable control terminal EN of MT3608 chip U6, and the other end is connected to ground to achieve voltage regulation. The positive terminal of the fourth diode D4 is connected to the power switch terminal SW of MT3608 chip U6, and the negative terminal is connected to the output of high-frequency boost circuit 1 to achieve reverse flow prevention. One end of the ninth inductor L9 is connected to the power switch terminal SW of MT3608 chip U6, and the other end is connected to the enable control terminal EN and the power supply terminal IN of MT3608 chip U6. The enable control terminal EN and the power supply terminal IN of MT3608 chip U6 are also connected to the low-voltage DC signal output by the power supply.

[0053] Therefore, the BOOST boost module can boost the voltage output from the power supply from 3.3V to 27.9V through the sampling module and output it to the dimming film driver circuit 3 as the power supply voltage.

[0054] In another embodiment, the high-frequency boost circuit 1 includes a switching module, a transformer module, and a rectifier module, wherein:

[0055] The switching module is connected to the primary coil of the main control circuit 2 and the transformer module respectively, and is used to adjust the on / off state according to the start signal of the main control circuit 2 and the magnetic field energy of the primary coil.

[0056] The secondary coil of the transformer module converts the low-voltage DC signal output by the power supply into a high-frequency AC pulse signal according to the on / off state of the switching module;

[0057] The secondary coil of the transformer module is coupled to the primary coil to convert high-frequency AC pulse signals into high-voltage AC signals;

[0058] The rectifier module is connected to the secondary coil and is used to process the high-voltage AC signal to output a high-voltage DC signal.

[0059] like Figure 6 As shown, the high-frequency boost circuit 1 includes a switching module Q3, a transformer module L12, a rectifier module D8, a 57th resistor R57, a 58th resistor R58, a 47th capacitor C47, and a 49th capacitor C49. One end of the 57th resistor R57 is connected to the main control circuit to obtain the ON / OFF start signal of the main control circuit 2, and the other end is connected to the gate of the switching module Q3. One end of the 58th resistor R58 is connected to the gate of the switching module Q3, and the other end is connected to the source of the switching module Q3 and grounded. One end of capacitor C49 is connected to the drain of switching module Q3, and the other end is connected to the low-voltage DC signal output by the power supply; one end of the primary coil of transformer module L12 is connected to the drain of switching module Q3, and the other end is connected to the low-voltage DC signal output by the power supply; one end of the secondary coil of transformer module L12 is connected to the AC input terminal of rectifier module D8, and the other end is connected to the other AC input terminal of rectifier module D8; the positive terminal of capacitor C47 is connected to the positive output terminal of rectifier module D8, and the negative terminal is connected to the reverse output terminal of rectifier module D8.

[0060] The main control circuit 2 controls the switching of the switch module Q3 through the start signal ON / OFF. It utilizes the energy storage and back electromotive force properties of the coil in the transformer module L12 to form the simplest self-oscillating circuit. The high-voltage AC signal output by the transformer module L12 is input to the dimming film drive circuit through the rectifier module D8 as the power supply voltage.

[0061] Therefore, regardless of the method used Figure 5 High-frequency boost circuit or Figure 6The high-frequency boost circuits can convert the 3.3V low-voltage DC signal output by the power supply into a 27.9V high-voltage DC signal using high-frequency pulses of 200KHz-2MHz, achieving small size and high efficiency boost energy conversion.

[0062] II. Main Control Circuit

[0063] like Figure 7 As shown, in this embodiment, the main control circuit 2 includes a main control chip U11, external resistors (e.g., R1, R2, R3, R4, R53, R54, R62) and external capacitors (e.g., C3, C40, C41, C42, C43, C44, C45). The main control chip U11 is preferably a CMT2380F64 chip, but this is not a limitation and can be selected according to the actual situation.

[0064] III. Dimming Film Driving Circuit

[0065] like Figure 8 As shown, in this embodiment, the dimming film driving circuit 3 includes a driving chip U5, peripheral resistors (e.g., R44, R45, R46, R47, R48) and peripheral capacitors (e.g., C21, C20, C23); wherein, the driving chip U5 is preferably a DRV8870DDA chip; one end of the forty-sixth resistor R46 is connected to the detection pin RS of the driving chip U5, and the other end is grounded to detect the current in real time and prevent abnormal output from damaging the dimming film.

[0066] The main control circuit 2 sends a 50Hz~60Hz square wave control signal to the dimming film drive circuit 3, causing the dimming film drive circuit 3 to output a 60V, 50Hz high voltage AC signal to control the opening of the dimming film, thereby providing a low-energy and precise power supply to the dimming film.

[0067] Therefore, the dimming film driving circuit 3 can convert the high-voltage DC signal into a high-voltage AC signal driven by a dimming film with a variable frequency of medium to low frequency.

[0068] In summary, the multi-frequency conversion power supply device of this utility model adopts a precise multi-level dimming mode, which can reduce energy consumption from the original 5W / square meter to 1.5W / square meter, directly reducing energy consumption by 3.3 times, while the energy utilization conversion efficiency reaches over 95%.

[0069] See Figure 9 , Figure 9 This illustrates a second embodiment of the multi-frequency conversion power supply device 100 of the present invention, and... Figure 1 Unlike the first embodiment shown, in this embodiment, the multi-frequency conversion power supply device 100 further includes a power supply voltage control circuit 5 and a solar energy control circuit 6, wherein:

[0070] The power supply voltage control circuit 5 is connected to the main control circuit 2 and the high-frequency boost circuit 1 respectively. It is used to output the low-voltage DC signal of the power supply to the high-frequency boost circuit 1 according to the power control signal of the main control circuit 2, and to detect the voltage information of the power supply in real time.

[0071] The solar control circuit 6 is connected to the main control circuit 2 and is used to control the working status of the solar panel in real time and to detect the charging current and voltage information of the solar panel in real time.

[0072] The power supply voltage control circuit 5 and the solar energy control circuit 6 will be explained in detail below with reference to the specific circuit diagrams:

[0073] I. Power Supply Voltage Control Circuit

[0074] like Figure 10 As shown, the power supply voltage control circuit 5 includes a first switching transistor Q1, a second switching transistor Q2, an eighteenth capacitor C18, a fifth diode E5, and external resistors (such as R35, R36, R40, R41, R42, and R43). The drain of the first switching transistor Q1 is connected to the high-frequency boost circuit 1, the source of the first switching transistor Q1 is connected to the power supply (POWER_BAT), the gate of the first switching transistor Q1 is connected to the drain of the second switching transistor Q2, the source of the second switching transistor Q2 is grounded, and the gate of the second switching transistor Q2 is connected to the main control circuit 2 through the thirty-fifth resistor R35. One end of the forty-third resistor R43 is connected to the main control circuit 2, and the other end is connected to the drain of the first switching transistor Q1 through the forty-first resistor R41.

[0075] During operation, the main control circuit 2 controls the second switching transistor Q2 to drive the first switching transistor Q1, thereby turning on the power switch and allowing the power to flow into the high-frequency boost circuit 1 for boosting.

[0076] It should be noted that when the first switching transistor Q1 is turned on, the power output terminal POWER_BAT is consistent with the electrical signal of the input terminal IN_3608 of the high-frequency boost circuit 1.

[0077] II. Solar Control Circuit

[0078] like Figure 11As shown, the solar control circuit 6 includes a switching transistor U2, a first Zener diode E1, a second Zener diode E2, a TVS diode U3, external capacitors (C5, C6, C19), and external resistors (R5, R6, R7, R8, R37, R38, R39). The switching transistor U2 is preferably a CMN3100AM chip. The drain of the switching transistor U2 is grounded through the TVS diode U3, and the source is connected to the solar panel to detect the solar panel's charging current ISUN and is connected to the main control circuit 2 through the seventh resistor R7. The gate is connected to the main control circuit 2 through the fifth resistor R5. One end of the thirty-seventh resistor R37 is connected to the solar panel to detect the solar panel's voltage information VSUN, and the other end is connected to the main control circuit 2.

[0079] It should be noted that the solar panel is used to supply power. During operation, the switching transistor U2 controls whether the solar panel is charging to the power source, the seventh resistor R7 provides feedback on the charging current, and the thirty-seventh resistor R37 provides feedback on the current voltage information of the solar panel.

[0080] Therefore, the solar control circuit 6 can collect solar energy to power the system and store energy, so that the system can be connected to electricity without external power supply, achieving permanent maintenance-free use after one-time installation.

[0081] See Figure 12 , Figure 12 This illustrates a third embodiment of the multi-frequency conversion power supply device 100 of this utility model, and... Figure 9 The second embodiment shown differs in that, in this embodiment, the multi-frequency conversion power supply device 100 further includes an LDO voltage regulator circuit 7, an RF radio frequency circuit 8, a lamp driver display circuit 9, and a button control circuit 10, wherein:

[0082] The LDO voltage regulator circuit 7 is connected to the main control circuit 2 and is used to output the low-voltage DC signal from the power supply to the main control circuit 2 to supply power to the main control circuit 2.

[0083] The RF circuit 8 is connected to the main control circuit 2 and is used to transmit RF signals to the outside according to the RF control signal output by the main control circuit 2;

[0084] The lamp driver display circuit 9 is connected to the main control circuit 2 and is used to adjust the working status of the indicator light according to the LED control signal output by the main control circuit 2.

[0085] The button control circuit 10 is connected to the main control circuit 2 and is used to collect button signals and output the button signals to the main control circuit 2.

[0086] The following sections, using specific circuit diagrams, provide detailed explanations of the LDO voltage regulator circuit 7, the RF radio frequency circuit 8, the lamp driver display circuit 9, and the button control circuit 10:

[0087] I. LDO voltage regulator circuit

[0088] like Figure 13 As shown, the LDO voltage regulator circuit 7 includes a voltage regulator chip U7, a fifty-sixth resistor R56, a twenty-seventh capacitor C27, and a twenty-eighth capacitor C28. Among them, the voltage regulator chip U7 is preferably an ME6228A30M3G chip. The input terminal VIN of the voltage regulator chip U7 is connected to the power supply (POWER_BAT) and the power supply test point BAT1 respectively, and is grounded through the twenty-seventh capacitor C27. The output terminal VOUT of the voltage regulator chip U7 is grounded through the twenty-eighth capacitor C28 and connected to the main control circuit 2 through the fifty-sixth resistor R56. The ground terminal VSS of the voltage regulator chip U7 is grounded.

[0089] Therefore, the LDO voltage regulator circuit 7 can convert the power output from the power supply (POWER_BAT) into a stable 3V power supply to power the main control circuit 2.

[0090] II. RF (Radio Frequency) Circuits

[0091] like Figure 14 As shown, the RF circuit 8 includes an antenna RF1 and peripheral inductors (such as L1, L2, L3, L4, L5, L6, L7, L8, L10, L11, U12), a bidirectional clamp D2 and peripheral capacitors (C31, C32, C33, C36, C37, C38, C39); wherein, the antenna RF1 is preferably a CA-S01 patch antenna.

[0092] Therefore, wireless communication can be achieved through RF radio frequency circuits, enabling wireless control of smart devices.

[0093] III. Lamp Driver Display Circuit

[0094] like Figure 15 As shown, the lamp driver display circuit 9 includes a first indicator LED1, a second indicator LED2, a fifty-first resistor R51, and a fifty-second resistor R52; wherein, the positive terminal of the first indicator LED1 is connected to the main control circuit 2 through the fifty-first resistor R51, and the negative terminal is grounded; the positive terminal of the second indicator LED2 is connected to the main control circuit 2 through the fifty-second resistor R52, and the negative terminal is grounded.

[0095] For example, when the solar control circuit 6 detects that the charging current and voltage information of the solar panel are normal, it can output a high-level signal to the second indicator LED2 to make the second indicator LED2 light up; otherwise, it can output a high-level signal to the first indicator LED1 to make the first indicator LED1 light up. However, this is not a limitation and can be set according to the actual situation.

[0096] Therefore, the on / off state of the first indicator LED1 and the second indicator LED2 can be controlled by the level signal output by the main control circuit 2.

[0097] IV. Button Control Circuit

[0098] like Figure 16 As shown, the button control circuit 10 includes a first button SW1, a second button SW2, a forty-ninth resistor R49, a fiftieth resistor R50, a twenty-fifth capacitor C25, and a twenty-sixth capacitor C26. The fixed contact of the first button SW1 is connected to the main control circuit 2 via the forty-ninth resistor R49, and its moving contact is grounded and connected to the main control circuit 2 via the twenty-fifth capacitor C25. The fixed contact of the second button SW2 is connected to the main control circuit 2 via the fiftieth resistor R50, and its moving contact is grounded and connected to the main control circuit 2 via the twenty-sixth capacitor C26.

[0099] For example, the first button SW1 can be used to operate the "dimming film atomization switch", and the second button SW2 can be used to operate the "dimming film code matching", but this is not a limitation and can be set according to the actual situation.

[0100] Therefore, users can input level signals to the main control circuit 2 through the first button SW1 and the second button SW2 to achieve information interaction.

[0101] In summary, the multi-frequency conversion power supply device 100 of this utility model integrates multi-frequency conversion technology, low-power solar energy acquisition technology, ultra-low power battery management technology and wireless interactive communication technology, and can utilize the current generated by the solar panel to achieve maximum energy conversion efficiency.

[0102] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A multi-frequency conversion power supply device, characterized in that, It includes a high-frequency boost circuit, a main control circuit, a dimming film drive circuit, and a buck circuit; The high-frequency boost circuit is connected to the dimming film driving circuit. The high-frequency boost circuit boosts the low-voltage DC signal from the external power supply to a high-voltage DC signal in a high-frequency switching manner, and outputs the high-voltage DC signal to the dimming film driving circuit to supply power to the dimming film driving circuit. The main control circuit is connected to the dimming film driving circuit, and the main control circuit outputs control signals to the dimming film driving circuit. The dimming film driving circuit converts the high-voltage DC signal into a high-voltage AC signal in a low-to-medium frequency switching manner according to the control signal, and outputs the high-voltage AC signal to the dimming film. The step-down circuit is connected to the dimming film driving circuit and is used to convert the high-voltage AC signal into a low-voltage DC signal to charge the power supply.

2. The multi-frequency conversion power supply device as described in claim 1, characterized in that, In the high-voltage AC signal output by the dimming film driving circuit, the switching frequency during the commutation period is greater than the switching frequency during the sustain period.

3. The multi-frequency conversion power supply device as described in claim 1, characterized in that, The high-frequency switching mode of the high-frequency boost circuit has a frequency of 200KHz~2MHz, and / or the low-frequency switching mode of the dimming film driving circuit has a frequency of 50Hz~60Hz.

4. The multi-frequency conversion power supply device as described in claim 1, characterized in that, The control signal output by the main control circuit is a square wave control signal of 50Hz~60Hz.

5. The multi-frequency conversion power supply device as described in claim 4, characterized in that, The waveform of the high-voltage AC signal output by the dimming film driving circuit includes, in sequence, a rising edge, an overshoot segment, a high-level segment, a falling edge, an undershoot segment, and a low-level segment.

6. The multi-frequency conversion power supply device as described in claim 1, characterized in that, The high-frequency boost circuit includes a BOOST boost module and a sampling module; The BOOST boost module is used to boost a low-voltage DC signal into a high-voltage DC signal using a high-frequency switching method. The sampling module is connected to the BOOST boost module and is used to detect the sampling current and output the sampling current to the BOOST boost module to adjust the high-voltage DC signal output by the BOOST boost module.

7. The multi-frequency conversion power supply device as described in claim 1, characterized in that, The high-frequency boost circuit includes a switching module, a transformer module, and a rectifier module; The switching module is connected to the primary coil of the main control circuit and the transformer module respectively, and is used to adjust the on / off state according to the start signal of the main control circuit and the magnetic field energy of the primary coil. The secondary coil of the transformer module converts the low-voltage DC signal into a high-frequency AC pulse signal according to the on / off state of the switching module; The secondary coil of the transformer module is coupled to the primary coil to convert the high-frequency AC pulse signal into a high-voltage AC signal; The rectifier module is connected to the secondary coil and is used to process the high-voltage AC signal to output a high-voltage DC signal.

8. The multi-frequency conversion power supply device as described in claim 1, characterized in that, Also includes: The power supply voltage control circuit, which is connected to the main control circuit and the high-frequency boost circuit respectively, is used to output the low-voltage DC signal of the power supply to the high-frequency boost circuit according to the power control signal of the main control circuit, and to detect the voltage information of the power supply in real time. The solar control circuit connected to the main control circuit is used to control the working status of the solar panel in real time and to detect the charging current and voltage information of the solar panel in real time.

9. The multi-frequency conversion power supply device as described in claim 1, characterized in that, Also includes: The LDO voltage regulator circuit connected to the main control circuit is used to output the low-voltage DC signal of the power supply to the main control circuit to supply power to the main control circuit; The RF circuit connected to the main control circuit is used to transmit RF signals to the outside according to the RF control signal output by the main control circuit; The lamp driver display circuit connected to the main control circuit is used to adjust the working status of the indicator light according to the LED control signal output by the main control circuit; The key control circuit connected to the main control circuit is used to acquire key signals and output the key signals to the main control circuit.

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