A flyback boost circuit, a wireless control boost circuit, a device and a control method

Abstract

The present invention discloses a flyback boost circuit, a wireless control boost circuit, a device and a control method, including a switch element, a transformer, a diode, a high-voltage capacitor and a load resistor, wherein the source of the switch element is configured to be connected to a power supply, and the drain of the switch element is connected to the second pin of the transformer; the first pin of the transformer is configured to be connected to the power supply; the positive electrode of the diode is connected to the fourth pin of the transformer, the positive electrode of the high-voltage capacitor is connected to the negative electrode of the diode, and the positive electrode of the load resistor is connected to the negative electrode of the diode; the negative electrode of the high-voltage capacitor is connected to the third pin of the transformer, and the negative electrode of the load resistor is connected to the third pin of the transformer, and the high-voltage capacitor and the load resistor are connected in parallel. By using a wireless control boost circuit designed based on a flyback boost circuit, it is ensured that the obtained boost device can effectively drive the motor, and the adaptability of the boost device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of thin film motors, and in particular to a flyback boost circuit, a wireless control boost circuit, a device and a control method. Background Art

[0002] With the advancement of science and technology and the trend of miniaturization of electronic devices, thin-film motors, as an emerging driving technology, show broad application prospects. Thin-film motors are motors made of thin-film materials. They have the characteristics of compact structure, light weight, low power consumption, and can provide efficient driving force in a small space. In the future, thin-film motors are expected to be widely used in portable medical devices, minimally invasive surgical instruments, smart homes, tactile feedback devices, and micro-robots. These application scenarios have strict requirements on the size and weight of the motors, requiring them to be efficient and portable. Thin-film motors rely on electrostatic force to generate drive, and usually require a driving voltage of more than 100 volts. In order to enable the application of thin-film motors in more scenarios, strict requirements are put forward for the power module, that is, while ensuring high voltage output, it must also have the characteristics of high efficiency and small size.

[0003] The high-voltage boost technology currently on the market has significant deficiencies in volume and weight control. Although some designs have attempted miniaturization, the actual device is still large in size and weight and cannot meet the requirements of portable devices. Moreover, this volume and weight problem limits the use of the device in application scenarios that require miniaturization and lightness, and cannot achieve true portability and flexibility. In addition, the existing technology is not compatible with thin-film motors. Although some boost circuits have been reduced in size, the design and optimization of these circuits have failed to fully consider the specific needs of thin-film motors, resulting in poor performance and poor applicability in actual applications. In addition, many devices use specially customized high-cost components, which increases the overall manufacturing cost and difficulty of purchase. These complex preparation methods and high-cost components are not conducive to the large-scale production and promotion of equipment, limiting its market potential and practical application scope. Summary of the invention

[0004] In order to solve the above technical problems, the embodiments of the present invention provide a flyback boost circuit, a wireless control boost circuit, a device and a control method. By using a wireless control boost circuit designed based on the flyback boost circuit, it is ensured that the obtained boost device can effectively drive the motor, thereby improving the adaptability of the boost device.

[0005] A first aspect of an embodiment of the present invention provides a flyback boost circuit, including a switch element, a transformer, a diode, a high-voltage capacitor and a load resistor.

[0006] Wherein, the source of the switch element is configured to be connected to the power supply, and the drain of the switch element is connected to the second pin of the transformer;

[0007] The first pin of the transformer is configured to be connected to a power source;

[0008] The positive electrode of the diode is connected to the fourth pin of the transformer, the positive electrode of the high-voltage capacitor is connected to the negative electrode of the diode, and the positive electrode of the load resistor is connected to the negative electrode of the diode;

[0009] The negative electrode of the high-voltage capacitor is connected to the third pin of the transformer, the negative electrode of the load resistor is connected to the third pin of the transformer, and the high-voltage capacitor and the load resistor are connected in parallel.

[0010] A second aspect of an embodiment of the present invention provides a wireless control boost circuit, including a DC power supply, a first circuit and a second circuit, wherein:

[0011] The first circuit comprises:

[0012] A voltage stabilizer and a plurality of branches, wherein a DC power supply is connected to a first branch, the first branch is connected to an input terminal of the voltage stabilizer, and a second branch is connected to an output terminal of the voltage stabilizer;

[0013] The second circuit is composed of a plurality of flyback boost circuits connected in parallel, wherein the flyback boost circuit is obtained by the flyback boost circuit of the first aspect of the embodiment of the present invention, and the second circuit includes:

[0014] A plurality of switch elements, wherein each switch element is connected in parallel and connected to an output end of the first circuit;

[0015] A plurality of transformers, wherein a first pin of each transformer is connected to an output end of the first circuit, and a second pin of each transformer is connected to a drain of a switch element corresponding to the transformer;

[0016] A plurality of diodes, wherein the anode of each diode is respectively connected to the fourth pin of the transformer corresponding to the diode, the anode of each high-voltage capacitor and each load resistor is respectively connected to the cathode of the diode corresponding to the high-voltage capacitor and the load resistor, the cathode of each high-voltage capacitor and each load resistor is respectively connected to the third pin of the corresponding transformer, and each high-voltage capacitor is connected in parallel with the load resistor corresponding to the high-voltage capacitor.

[0017] In a possible implementation manner of the second aspect, the first branch includes a first capacitor and a second capacitor, and the first capacitor is connected in parallel with the second capacitor;

[0018] The second branch includes a third capacitor and a fourth capacitor, and the third capacitor is connected in parallel with the fourth capacitor.

[0019] In a possible implementation manner of the second aspect, the plurality of switch elements include a first switch element, a second switch element, a third switch element, a fourth switch element, and a fifth switch element.

[0020] In a possible implementation manner of the second aspect, the second circuit further includes at least one resistor, and each resistor is respectively connected to a gate of a switching element corresponding to the resistor.

[0021] In a possible implementation of the second aspect, each high-voltage capacitor includes a first high-voltage capacitor, a second high-voltage capacitor, a third high-voltage capacitor, a fourth high-voltage capacitor, and a fifth high-voltage capacitor;

[0022] The respective load resistors include a first load resistor, a second load resistor, a third load resistor, a fourth load resistor, and a fifth load resistor.

[0023] In a possible implementation manner of the second aspect, each high-voltage capacitor is connected in parallel with a load resistor corresponding to the high-voltage capacitor, including:

[0024] The first high-voltage capacitor is connected in parallel with the first load resistor, the second high-voltage capacitor is connected in parallel with the second load resistor, the third high-voltage capacitor is connected in parallel with the third load resistor, the fourth high-voltage capacitor is connected in parallel with the fourth load resistor, and the fifth high-voltage capacitor is connected in parallel with the fifth load resistor.

[0025] A third aspect of an embodiment of the present invention provides a wireless control boost device, comprising a wireless control module, a boost module and a thin film motor, wherein:

[0026] The boost module includes a power supply unit, a voltage stabilizing unit and a flyback boost unit, and the boost module is composed of the wireless control boost circuit according to the second aspect of the embodiment of the present invention;

[0027] The wireless control module is connected to the boost module, and the boost module is connected to the thin film motor.

[0028] In a possible implementation of the third aspect, the wireless control module is used to receive a control signal through wireless transmission, process the control signal to obtain a voltage signal, and control the closing and opening of the switch element according to the voltage information;

[0029] The boost module is used to use the power supply unit to provide a DC power signal to the voltage stabilizing unit, so that the voltage stabilizing unit processes the DC power signal to obtain a stabilized DC power signal, and sends the stabilized DC power signal to the wireless control module or the flyback boost unit, so that the wireless control module works according to the stabilized DC power signal, or the flyback boost unit converts the stabilized DC power signal into a high-voltage signal and sends it to the thin-film motor;

[0030] The thin film motor is used to receive high voltage signals and operate according to the high voltage signals.

[0031] A fourth aspect of the embodiments of the present invention provides a control method for a wirelessly controlled boost circuit, the control method being used for the wirelessly controlled boost circuit of the second aspect of the embodiments of the present invention or the wirelessly controlled boost device of the third aspect of the embodiments of the present invention, comprising:

[0032] When the switch element is turned on, the current generated by the DC power supply flows into the primary coil of the transformer, charging the magnetic core, and the diode blocks the formation of the secondary coil current, and the high-voltage capacitor provides energy to the thin-film motor;

[0033] When the switching element is turned off, the primary excitation inductance of the transformer is discharged, the diode is turned on, a secondary current is formed and discharged to the high-voltage capacitor and the thin-film motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 : A schematic diagram of the structure connection of a flyback boost circuit of an embodiment of the flyback boost circuit provided by the present invention;

[0035] Figure 2 : A schematic diagram of output voltage when the load resistance is different after a thin-film motor is connected to another embodiment of the flyback boost circuit provided by the present invention;

[0036] Figure 3 : A structural connection diagram of a five-channel flyback boost circuit of another embodiment of the flyback boost circuit provided by the present invention;

[0037] Figure 4 : A specific circuit structure diagram of a voltage stabilizing circuit of another embodiment of a flyback boost circuit provided by the present invention;

[0038] Figure 5 : A module diagram of a wireless control boost device of another embodiment of the flyback boost circuit provided by the present invention;

[0039] Figure 6 : A flow chart of a control method for another embodiment of the flyback boost circuit provided by the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] The terms "first" and "second" and the like in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0042] Please refer to Figure 1 , Figure 1 Schematic diagram of the structural connection relationship of a flyback boost circuit provided by an embodiment of the present invention. The present invention provides a flyback boost circuit, including a switch element, a transformer, a diode, a high-voltage capacitor and a load resistor.

[0043] Wherein, the source of the switch element is configured to be connected to the power supply, and the drain of the switch element is connected to the second pin of the transformer;

[0044] The first pin of the transformer is configured to be connected to a power source;

[0045] The positive electrode of the diode is connected to the fourth pin of the transformer, the positive electrode of the high-voltage capacitor is connected to the negative electrode of the diode, and the positive electrode of the load resistor is connected to the negative electrode of the diode;

[0046] The negative electrode of the high-voltage capacitor is connected to the third pin of the transformer, the negative electrode of the load resistor is connected to the third pin of the transformer, and the high-voltage capacitor and the load resistor are connected in parallel.

[0047] In this embodiment, in order to design a smaller and lighter high-voltage boost module to improve the portability and adaptability of the device and facilitate integration into various devices, a wireless control boost device is proposed, wherein the core boost part of the device is a flyback boost circuit, which is responsible for boosting the input low voltage to the required high voltage level to drive the thin-film motor. The flyback boost circuit is based on the principle of a flyback converter, and its working process includes energy storage, release and feedback control. Figure 1 As shown, Vs is the primary side DC power supply of the transformer for providing energy, the positive electrode of the power supply Vs is connected to pin 1 of the transformer T, the negative electrode of the power supply Vs is connected to the source of the switching element, the drain of the switching element NMOS is connected to pin 2 of the transformer T, the pin 4 of the transformer T is connected to the positive electrode of the diode D, the negative electrode of the diode D is connected to the positive electrodes of the capacitor C and the resistor R, and the pin 3 of the transformer T is connected to the negative electrodes of the capacitor C and the resistor R.

[0048] It is worth noting that the switch element preferably uses an N-channel MOSFET, the first pin refers to the pin 1 of the transformer T, the second pin refers to the pin 2 of the transformer T, the third pin refers to the pin 3 of the transformer T, the fourth pin refers to the pin 4 of the transformer T, the high-voltage capacitor is the capacitor C, and the load resistor is the resistor R. The power supply refers to a power supply device that can be used to provide energy.

[0049] Since the thin film motor relies on electrostatic force to generate mechanical vibration, its load is a capacitive load. In the flyback boost circuit, the capacitive load may cause instability, especially during startup and operation. To ensure the normal operation of the thin film motor and maintain stable driving, a resistor is connected in parallel to the output of the flyback boost circuit. During the charging or discharging process of the capacitive load, the voltage cannot quickly reach the steady-state value, but will change slowly over a period of time, resulting in voltage tailing. This phenomenon will cause the system to respond untimely or errors in fast switching and precise control. The parallel resistor provides a discharge path for the capacitor, allowing the voltage to reach the steady-state value faster. This is particularly important for thin film motor applications that require fast response and stable output. It also improves the load characteristics. The parallel resistor provides the necessary damping, reduces the impact of resonance on the circuit, and improves the stability and reliability of the system.

[0050] Through multiple tests, such as Figure 2 As shown, when the output module is connected to the thin film motor, when the parallel resistance is greater than 100M ohms or when no resistance is connected in parallel, the voltage tail is very long, which seriously affects the use of the thin film motor. When the resistance is in the range of 1-5M ohms in parallel, the voltage waveform fluctuation effect is similar to that when the resistance is very large, but the voltage tail phenomenon is greatly improved, and the start and shutdown of the mechanical movement of the thin film motor is faster. Therefore, it is preferred to use 4M ohm resistors in parallel, but because the preparation materials of thin film motors are constantly updated, the impedance characteristics of thin film motors of different materials are also different. Therefore, in practical applications, different resistance values ​​can be changed according to specific actual needs to adapt to thin film motors.

[0051] In order to solve the same technical problem, an embodiment of the present application further provides a wireless control boost circuit, including a DC power supply, a first circuit and a second circuit, wherein:

[0052] The first circuit comprises:

[0053] A voltage stabilizer and a plurality of branches, wherein a DC power supply is connected to a first branch, the first branch is connected to an input terminal of the voltage stabilizer, and a second branch is connected to an output terminal of the voltage stabilizer;

[0054] The second circuit is composed of a plurality of flyback boost circuits connected in parallel, wherein the flyback boost circuit is obtained by the above-mentioned flyback boost circuit, and the second circuit includes:

[0055] A plurality of switch elements, wherein each switch element is connected in parallel and connected to an output end of the first circuit;

[0056] A plurality of transformers, wherein a first pin of each transformer is connected to an output end of the first circuit, and a second pin of each transformer is connected to a drain of a switch element corresponding to the transformer;

[0057] A plurality of diodes, wherein the anode of each diode is respectively connected to the fourth pin of the transformer corresponding to the diode, the anode of each high-voltage capacitor and each load resistor is respectively connected to the cathode of the diode corresponding to the high-voltage capacitor and the load resistor, the cathode of each high-voltage capacitor and each load resistor is respectively connected to the third pin of the corresponding transformer, and each high-voltage capacitor is connected in parallel with the load resistor corresponding to the high-voltage capacitor.

[0058] In this embodiment, the wireless control boost device comprises a power supply battery, a voltage stabilizing circuit, a flyback boost circuit and a wireless control module, and finally outputs a high voltage to drive the thin film motor. Among them, the power supply battery provides the energy required by the entire circuit, the voltage stabilizing circuit is responsible for outputting a stable voltage to the wireless control module and the flyback boost circuit, the wireless control module controls the flyback boost circuit by continuously changing the switch signal, and the flyback boost circuit can convert the low voltage input by the voltage stabilizing circuit into a high voltage signal through voltage conversion, and finally output it to the thin film motor.

[0059] It should be noted that a DC power supply refers to a device that maintains a constant voltage and current in a circuit, including but not limited to dry batteries, storage batteries, DC generators and other devices, which provide power for the wireless control boost device. The first circuit refers to a voltage stabilizing circuit used to output a stable voltage to the wireless control module and the flyback boost circuit, and the second circuit refers to a multi-channel boost circuit composed of a flyback boost circuit.

[0060] Specifically, Figure 3The specific circuit structure diagram of the five-channel flyback boost circuit is shown, and a five-channel wireless control boost circuit is proposed. To ensure that the five channels can drive the thin-film motor normally without interfering with each other, FreeRTOS (real-time operating system) is transplanted in ESP32 to improve the accuracy and frequency of the output voltage, and broaden the application field of the equipment. At the same time, more channels can be controlled according to needs. The circuit is arranged based on the principle of the flyback boost circuit. The added network number V1 is the DC signal after passing through the voltage stabilizing circuit, the network numbers IN1-IN5 represent the control signals for controlling the switching devices, the device numbers R1, R3, R5, R7, R9 are resistors connected to the gate of the switching device NMOS, the device numbers U1, U2, U3, U4 and U5 represent the switching device NMOS, the device numbers T1-T5 are transformers, the device numbers D1-D5 are high-voltage diodes, the device numbers C1, C2, C3, C4 and C5 are high-voltage capacitors, the device numbers R2, R4, R6, R8 and R10 are load voltage stabilizing resistors, the network numbers Vout1-Vout5 represent the final output, "+" is the positive pole and "-" is the negative pole.

[0061] The voltage stabilization circuit is used to stabilize the power signal provided by the DC power supply and provide power to the ESP32 control module and the primary side of the flyback boost circuit respectively. The voltage stabilization circuit not only ensures the stability of the final output voltage, but also ensures the normal operation of the control module. The voltage stabilization circuit includes capacitor Cv1, capacitor Cv2, capacitor Cv3, capacitor Cv4 and a voltage stabilizer.

[0062] exist Figure 3 In the figure, resistors with device numbers R1, R3, R5, R7 and R9 are connected to the gates of the NMOS switching devices with device numbers U1, U2, U3, U4 and U5, respectively, that is, resistor R1 is connected to the gate of the switching device U1, resistor R3 is connected to the gate of the switching device U2, resistor R5 is connected to the gate of the switching device U3, resistor R7 is connected to the gate of the switching device U4, and resistor R9 is connected to the gate of the switching device U5.

[0063] The first pin of the transformer T1 is connected to the output end of the voltage stabilizing circuit for receiving the stabilized DC signal V1, the second pin of the transformer is connected to the drain of the switching element U1 corresponding to the transformer, the first pin of the transformer T2 is connected to the output end of the voltage stabilizing circuit, the second pin of the transformer is connected to the drain of the switching element U2 corresponding to the transformer, the first pin of the transformer T3 is connected to the output end of the voltage stabilizing circuit, the second pin of the transformer is connected to the drain of the switching element U3 corresponding to the transformer, the first pin of the transformer T4 is connected to the output end of the voltage stabilizing circuit, the second pin of the transformer is connected to the drain of the switching element U4 corresponding to the transformer, the first pin of the transformer T5 is connected to the output end of the voltage stabilizing circuit, and the second pin of the transformer is connected to the drain of the switching element U5 corresponding to the transformer.

[0064] The anodes of the diode D1, the diode D2, the diode D3, the diode D4 and the diode D5 are connected to the fourth pins of the corresponding transformers T1, T2, T3, T4 and T5, respectively.

[0065] The positive electrodes of the high-voltage capacitor C1, the high-voltage capacitor C2, the high-voltage capacitor C3, the high-voltage capacitor C4 and the high-voltage capacitor C5 are respectively connected to the negative electrodes of the corresponding diodes D1, D2, D3, D4 and D5, and the negative electrodes of the high-voltage capacitors are respectively connected to the third pins of the corresponding transformers T1, T2, T3, T4 and T5.

[0066] The positive electrodes of the load stabilizing resistor R2, the load stabilizing resistor R4, the load stabilizing resistor R6, the load stabilizing resistor R8 and the load stabilizing resistor R10 are respectively connected to the negative electrodes of the corresponding diodes D1, D2, D3, D4 and D5, and the negative electrodes of the load stabilizing resistors are respectively connected to the third pins of the corresponding transformers T1, T2, T3, T4 and T5.

[0067] In one embodiment, the first branch includes a first capacitor and a second capacitor, and the first capacitor is connected in parallel with the second capacitor;

[0068] The second branch includes a third capacitor and a fourth capacitor, and the third capacitor is connected in parallel with the fourth capacitor.

[0069] In this embodiment, Figure 4 The specific circuit structure diagram of the voltage stabilization circuit and the preferred device model are shown in FIG. Capacitors Cv1 and Cv2 are connected in parallel to the input port of the low-dropout linear regulator (LDO), and capacitors Cv3 and Cv4 are connected to the output port of the low-dropout linear regulator (LDO). The input port input is the battery voltage VBAT, and the output is the regulated voltage V1.

[0070] In one embodiment, the plurality of switch elements include a first switch element, a second switch element, a third switch element, a fourth switch element and a fifth switch element.

[0071] In the present embodiment, device numbers U1, U2, U3, U4 and U5 represent switching devices, and the switching element U1, the switching element U2, the switching element U3, the switching element U4 and the switching element U5 are connected in parallel.

[0072] In one embodiment, the second circuit further includes at least one resistor, and each resistor is connected to a gate of a switch element corresponding to the resistor.

[0073] In this embodiment, device number resistors R1 , R3 , R5 , R7 , and R9 are connected to the gate of the switch device NMOS.

[0074] In one embodiment, each high-voltage capacitor includes a first high-voltage capacitor, a second high-voltage capacitor, a third high-voltage capacitor, a fourth high-voltage capacitor and a fifth high-voltage capacitor, and each load resistor includes a first load resistor, a second load resistor, a third load resistor, a fourth load resistor and a fifth load resistor.

[0075] In this embodiment, the high-voltage capacitors are high-voltage capacitor C1, high-voltage capacitor C2, high-voltage capacitor C3, high-voltage capacitor C4 and high-voltage capacitor C5, and the load resistors are load voltage-stabilizing resistor R2, load voltage-stabilizing resistor R4, load voltage-stabilizing resistor R6, load voltage-stabilizing resistor R8 and load voltage-stabilizing resistor R10.

[0076] In one embodiment, each high-voltage capacitor is connected in parallel with a load resistor corresponding to the high-voltage capacitor, including:

[0077] The first high-voltage capacitor is connected in parallel with the first load resistor, the second high-voltage capacitor is connected in parallel with the second load resistor, the third high-voltage capacitor is connected in parallel with the third load resistor, the fourth high-voltage capacitor is connected in parallel with the fourth load resistor, and the fifth high-voltage capacitor is connected in parallel with the fifth load resistor.

[0078] In this embodiment, the high-voltage capacitor C1, the high-voltage capacitor C2, the high-voltage capacitor C3, the high-voltage capacitor C4, and the high-voltage capacitor C5 are respectively connected in parallel with the corresponding load stabilizing resistor R2, the load stabilizing resistor R4, the load stabilizing resistor R6, the load stabilizing resistor R8, and the load stabilizing resistor R10.

[0079] In some embodiments, Figure 5 As shown, it shows a module diagram of a wireless control boost device provided in an embodiment of the present application, including a wireless control module, a boost module and a thin film motor, wherein:

[0080] The boost module includes a power supply unit, a voltage stabilizing unit and a flyback boost unit, and the boost module is composed of the above-mentioned wireless control boost circuit;

[0081] The wireless control module is connected to the boost module, and the boost module is connected to the thin film motor.

[0082] In this embodiment, the wireless control boost device comprises a power supply battery, a voltage stabilizing circuit, a flyback boost circuit and a wireless control module, and finally outputs a high voltage to drive the thin film motor. Among them, the power supply battery provides the energy required by the entire circuit, the voltage stabilizing circuit is responsible for stabilizing the power signal output by the power supply battery, and outputs a stable voltage to the wireless control module and the flyback boost circuit. The wireless control module controls the flyback boost circuit by continuously changing the switch signal. The flyback boost circuit can convert the low voltage input by the voltage stabilizing circuit into a high voltage signal through voltage conversion, and finally output it to the thin film motor.

[0083] For the convenience of operation, the device is also integrated with a wireless communication module, so that users can control it wirelessly through a mobile phone or computer. This wireless control method uses the ESP32 module, which not only has high-performance wireless communication capabilities, but also supports multiple network protocols, such as Wi-Fi and Bluetooth, to ensure that the connection with the control device is more flexible and convenient. The user can transmit the required signal to the ESP32 module wirelessly. After the ESP32 module processes the signal, it outputs the corresponding PWM (pulse width modulation) voltage signal through its output pin to control the on and off of the switching device, thereby adjusting the flyback boost circuit to adjust the output voltage. There is no need to physically contact the device, which significantly improves the convenience and flexibility of operation. This wireless control method avoids physical contact with the device, improves the convenience and flexibility of operation, reduces the complexity of wiring, and is particularly suitable for application scenarios that require frequent adjustment and monitoring. The wireless communication module enables users to remotely operate the device, simplifies the use process, and improves the safety and reliability of the device. This technology provides greater potential for the application of thin-film motors in the field of portable wearable devices, meeting the requirements of modern smart devices for miniaturization, efficiency and ease of operation.

[0084] It should be noted that the wireless control method preferably uses the ESP32-WROOM-32 module, including but not limited to the use of the ESP32 module.

[0085] In some embodiments, the wireless control module is used to receive a control signal through wireless transmission, and process the control signal to obtain a voltage signal, and control the closing and opening of the switch element according to the voltage information;

[0086] The boost module is used to use the power supply unit to provide a DC power signal to the voltage stabilizing unit, so that the voltage stabilizing unit processes the DC power signal to obtain a stabilized DC power signal, and sends the stabilized DC power signal to the wireless control module or the flyback boost unit, so that the wireless control module works according to the stabilized DC power signal, or the flyback boost unit converts the stabilized DC power signal into a high-voltage signal and sends it to the thin-film motor;

[0087] The thin film motor is used to receive high voltage signals and operate according to the high voltage signals.

[0088] In this embodiment, the power supply battery provides the energy required for the entire circuit, the voltage stabilizing circuit is responsible for outputting a stable voltage to the wireless control module and the flyback boost circuit, the wireless control module controls the flyback boost circuit by continuously changing the switching signal, and the flyback boost circuit can convert the low voltage input by the voltage stabilizing circuit into a high voltage signal through voltage conversion, and finally output it to the thin-film motor.

[0089] As an example of this embodiment, two wireless control small boost modules suitable for thin film motors are prepared, namely five-channel control and single-channel control. The five-channel wireless control small boost module can provide voltage output of five independent channels, can output a peak voltage of up to 380V, a stable maximum square wave output voltage of 300V, an output voltage frequency range of 0-50kHz, and a circuit module area of ​​33×55 mm². Compared with the related boost circuit in the prior art, the volume of the module is greatly reduced, which increases portability. Its voltage amplitude and frequency are suitable for driving thin film motors made of various commonly used materials. The output voltage parameters of the single-channel wireless control small boost module are the same as those of the five-channel module, but the volume is further reduced, and the circuit area is 23×40 mm². In actual use, the corresponding number of channels can be selected according to actual needs, and the circuit topology can be adjusted under the same circuit principle.

[0090] In some embodiments, Figure 6 As shown, it shows a control method of a wireless control boost circuit provided by an embodiment of the present application, including:

[0091] When the switch element is turned on, the current generated by the DC power supply flows into the primary coil of the transformer, charging the magnetic core, and the diode blocks the formation of the secondary coil current, and the high-voltage capacitor provides energy to the thin-film motor;

[0092] When the switching element is turned off, the primary excitation inductance of the transformer is discharged, the diode is turned on, a secondary current is formed and discharged to the high-voltage capacitor and the thin-film motor.

[0093] In this embodiment, when the switch element NMOS is turned on, the inductor current on the primary side of the transformer T begins to rise. At this time, due to the relationship between the secondary terminals, the output diode D is cut off, the transformer stores energy, and the load is provided with energy by the output capacitor C. When the switch element is turned off, the magnetic field disappears sharply, and the secondary winding of the transformer T induces a high voltage. This high voltage is rectified by the diode D to supply power to the load of the transformer secondary side circuit, and at the same time, the capacitor C is charged to replenish the energy just lost. R is a parallel resistor for stabilizing the voltage.

[0094] When the switching device is turned on, the current generated by the power supply flows into the primary coil of the transformer and charges the magnetic core. The diode blocks the formation of the secondary coil current, and the capacitor provides energy to the thin-film motor. When the switching device is turned off, the primary excitation inductor discharges, the diode is turned on, the secondary current is formed and discharges to the capacitor and the thin-film motor, thereby outputting the voltage. The frequency and amplitude of the final output voltage can be changed by turning the switching device on and off. If a DC-DC (direct current-to-direct current) transformer is used to achieve a hundred-fold voltage amplification, a larger magnetic core and winding are usually required, which will increase the overall volume. The use of a flyback circuit can significantly reduce the volume and mass of the overall boost module, and achieve efficient energy conversion under high-frequency operation, which is very suitable for space-constrained application scenarios.

[0095] Compared with the prior art, the present invention has the following beneficial effects:

[0096] A flyback boost circuit, a wireless control boost circuit, a device and a control method, including a switch element, a transformer, a diode, a high-voltage capacitor and a load resistor, wherein the source of the switch element is configured to be connected to a power supply, and the drain of the switch element is connected to the second pin of the transformer; the first pin of the transformer is configured to be connected to the power supply; the positive electrode of the diode is connected to the fourth pin of the transformer, the positive electrode of the high-voltage capacitor is connected to the negative electrode of the diode, and the positive electrode of the load resistor is connected to the negative electrode of the diode; the negative electrode of the high-voltage capacitor is connected to the third pin of the transformer, and the negative electrode of the load resistor is connected to the third pin of the transformer, and the high-voltage capacitor and the load resistor are connected in parallel. By designing a wireless control boost circuit according to the voltage waveform and input characteristics, it is ensured that the obtained boost device can effectively drive the motor, and the adaptability of the boost device is improved.

[0097] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wireless control boost circuit, characterized in that: It includes a DC power supply, a first circuit and a second circuit, wherein: The first circuit comprises: A voltage stabilizer, a first branch and a second branch, wherein the DC power supply is connected to the first branch, the first branch is connected to an input end of the voltage stabilizer, and the second branch is connected to an output end of the voltage stabilizer; The second circuit is composed of a plurality of flyback boost circuits connected in parallel, wherein the second circuit includes: A plurality of switch elements, wherein each of the switch elements is connected in parallel and connected to an output end of the first circuit; A plurality of transformers, wherein a first pin of each transformer is connected to an output end of the first circuit, and a second pin of each transformer is connected to a drain of a corresponding switching element; A plurality of diodes, wherein the anode of each diode is respectively connected to the fourth pin of the corresponding transformer, the anode of each high-voltage capacitor and the anode of each load resistor are respectively connected to the cathode of the corresponding diode, the cathode of each high-voltage capacitor and the cathode of each load resistor are respectively connected to the third pin of the corresponding transformer, and each high-voltage capacitor is connected in parallel with the corresponding load resistor; The flyback boost circuit includes a switch element, a transformer, a diode, a high-voltage capacitor and a load resistor. Wherein, the source of the switch element is configured to be connected to the DC power supply, and the drain of the switch element is connected to the second pin of the transformer; The first pin of the transformer is configured to be connected to the DC power supply; The positive electrode of the diode is connected to the fourth pin of the transformer, the positive electrode of the high-voltage capacitor is connected to the negative electrode of the diode, and the positive electrode of the load resistor is connected to the negative electrode of the diode; The negative electrode of the high-voltage capacitor is connected to the third pin of the transformer, the negative electrode of the load resistor is connected to the third pin of the transformer, the high-voltage capacitor and the load resistor are connected in parallel, wherein the load resistor is also configured to be connected to a thin-film motor, the load resistor is used to provide a discharge path so that the voltage reaches a steady-state value so as to stably drive the thin-film motor, and the load resistor uses a 4M ohm resistor.

2. The wireless control boost circuit according to claim 1, characterized in that: The first branch includes a first capacitor and a second capacitor, and the first capacitor is connected in parallel with the second capacitor; The second branch includes a third capacitor and a fourth capacitor, and the third capacitor is connected in parallel with the fourth capacitor.

3. The wireless control boost circuit according to claim 1, characterized in that: The plurality of switching elements include a first switching element, a second switching element, a third switching element, a fourth switching element, and a fifth switching element.

4. The wireless control boost circuit according to claim 1, characterized in that: The second circuit further includes at least one resistor, and each of the resistors is connected to a gate of a corresponding switch element.

5. The wireless control boost circuit according to claim 1, characterized in that: The high-voltage capacitors include a first high-voltage capacitor, a second high-voltage capacitor, a third high-voltage capacitor, a fourth high-voltage capacitor and a fifth high-voltage capacitor; The load resistors include a first load resistor, a second load resistor, a third load resistor, a fourth load resistor and a fifth load resistor.

6. The wireless control boost circuit according to claim 5, characterized in that: Each of the high-voltage capacitors is connected in parallel with the corresponding load resistor, comprising: The first high-voltage capacitor is connected in parallel with the first load resistor, the second high-voltage capacitor is connected in parallel with the second load resistor, the third high-voltage capacitor is connected in parallel with the third load resistor, the fourth high-voltage capacitor is connected in parallel with the fourth load resistor, and the fifth high-voltage capacitor is connected in parallel with the fifth load resistor.

7. A wireless control boost device, characterized in that: It includes a wireless control module, a boost module and a thin film motor, wherein: The boost module comprises a power supply unit, a voltage stabilizing unit and a flyback boost unit, and the boost module is composed of the wireless control boost circuit according to any one of claims 1 to 6; The wireless control module is connected to the boost module, and the boost module is connected to the thin film motor.

8. The wireless control voltage boosting device according to claim 7, characterized in that: The wireless control module is used to receive a control signal through wireless transmission, process the control signal to obtain a voltage signal, and control the closing and opening of the switch element according to the voltage signal; The boost module is used to use the power supply unit to provide a DC power signal to the voltage stabilizing unit, so that the voltage stabilizing unit processes the DC power signal to obtain a stabilized DC power signal, and sends the stabilized DC power signal to the wireless control module or the flyback boost unit, so that the wireless control module works according to the stabilized DC power signal, or the flyback boost unit converts the stabilized DC power signal into a high-voltage signal and sends it to the thin-film motor; The thin film motor is used to receive the high voltage signal and operate according to the high voltage signal.

9. A control method for a wireless control boost circuit, characterized in that: The control method is used for the wireless control boost circuit as described in any one of claims 1 to 6, or for the wireless control boost device as described in any one of claims 7 to 8, comprising: When the switch element is turned on, the current generated by the DC power supply flows into the primary coil of the transformer to charge the magnetic core, the diode blocks the formation of the secondary coil current, and the high-voltage capacitor provides energy to the thin-film motor; When the switch element is turned off, the primary excitation inductance of the transformer is discharged, and the diode is turned on, forming a secondary coil current and discharging to the high-voltage capacitor and the thin-film motor.

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