Closed-loop buck-boost power supply circuit for high-frequency surgical equipment

Abstract

The utility model discloses a closed-loop buck-boost power supply circuit for high-frequency surgical equipment, belongs to the technical field of voltage control of medical instruments, and solves the problems that a direct-current switching power supply circuit in the prior art is complicated in structure and needs to be additionally provided with an additional conversion circuit to meet the requirement of an output end of the high-frequency surgical equipment. The device mainly comprises a power supply, the power supply is electrically connected with an AC-DC conversion module, the AC-DC conversion module is connected with a power supply driving module, the power supply driving module is connected with a voltage regulation output module, the voltage regulation output module is connected with an output port, and a data processing module is electrically connected between the voltage regulation output module and the output port. The data processing module is electrically connected with the micro-control unit, and the data processing module is electrically connected with the power supply driving module. According to the utility model, the acquisition feedback circuit is additionally arranged at the output port, so that the micro-control unit acquires the current direct-current voltage constantly, and the stability and reliability of the whole system are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage control of medical equipment, in particular to a closed-loop step-up and step-down power supply circuit for high-frequency surgical equipment. Background Art

[0002] Relying on current technology, to complete the task of outputting DC bus voltage, most of them use multi-way switching power supply modules, whose output is a specified non-adjustable DC voltage, etc. In the prior art, the application with publication number CN219420601U discloses an adjustable high-voltage DC power supply circuit based on open-loop soft switching, but it has no feedback circuit; as a result, the MCU cannot accurately know the current output DC bus voltage; most of the equipment can only use the DC voltage output by the current switching power supply, and add additional conversion circuits to meet the requirements of the output end of high-frequency surgical equipment, which is costly. And relying on external load changes to modulate the output of the high-frequency electric knife, due to open-loop control, the risk of excessive or too low output power of the equipment during operation, poor reliability, and low production capacity. At present, there is a lack of a closed-loop buck-boost power supply circuit for high-frequency surgical equipment to avoid multi-way switching power supplies. Utility Model Content

[0003] The purpose of the utility model is to provide a closed-loop buck-boost power supply circuit for high-frequency surgical equipment to solve the problem that the DC switching power supply circuit in the prior art has a complex structure and needs to add an additional conversion circuit to meet the requirements of the output end of the high-frequency surgical equipment.

[0004] The utility model is realized by the following technical solutions:

[0005] A closed-loop buck-boost power supply circuit for high-frequency surgical equipment comprises a power supply, the power supply is electrically connected to an AC-DC conversion module, the AC-DC conversion module is connected to a power drive module, the power drive module is connected to a voltage regulating output module, the voltage regulating output module is connected to an output port, a data processing module is electrically connected between the voltage regulating output module and the output port; the data processing module is electrically connected to a micro control unit, and the data processing module is electrically connected to the power drive module.

[0006] Furthermore, the data processing module collects a DC signal X2 at the output port position, and the DC signal X2 is processed by the data processing module to generate a flag signal X3 which is transmitted to the microcontroller unit. The microcontroller unit generates an analog signal X4 by processing the flag signal X3 and feeds it back to the data processing module. The analog signal X4 is then processed by the data processing module to generate a drive signal X1 which is transmitted to the power drive module.

[0007] Furthermore, the power drive module includes an oscillation circuit chip IC5, which is electrically connected to a pulse width modulation chip IC1 and a pulse width modulation chip IC2; the pulse width modulation chip IC1 is connected to one of the input ends of the NAND gate IC10, and the pulse width modulation chip IC2 is connected to one of the input ends of the NAND gate IC11, and the other input ends of the NAND gate IC10 and the NAND gate IC11 are connected to the driving signal X1, and the output ends of the NAND gate IC10 and the NAND gate IC11 are both connected to the output port OUT1 through the transformer T1, and are connected to the input port IN2 at the same time.

[0008] Furthermore, the voltage regulation output module includes an input port IN2, the input port IN2 is connected to a rectifier circuit via a transformer T2, the rectifier circuit is connected to an output port OUT2, and the rectifier circuit outputs a DC signal X2.

[0009] Furthermore, the data processing module includes an operational amplifier IC3, the operational amplifier IC3 is electrically connected to a pulse width modulation chip IC4, and the pulse width modulation chip IC4 outputs a driving signal X1.

[0010] Furthermore, the pulse width modulation chip IC4 is connected to a delay circuit.

[0011] Furthermore, the delay circuit includes a resistor R7 and a capacitor C3.

[0012] Furthermore, the pulse width modulation chip IC4 is connected to one input end of the NAND gate IC8, the other input end of the NAND gate IC8 is connected to the switch signal X5, and the output end of the NAND gate IC8 outputs the driving signal X1.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model adopts a data processing module to collect the DC signal X2 of the output port, so that the micro control unit can collect the current DC voltage at all times and control the output voltage at any time, which is safe and reliable. The PID algorithm in the software ensures the stability and reliability of the entire system. The utility model does not need to design a multi-channel DC switching power supply, and only needs one channel to meet the requirements of high-frequency surgical equipment, which saves cost and space, and is cheap and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a flow chart of the utility model;

[0016] Figure 2 It is a circuit schematic diagram of the power drive module of the utility model;

[0017] Figure 3 It is a circuit schematic diagram of the voltage regulating output module of the utility model;

[0018] Figure 4 It is a circuit principle diagram of the data processing module of the utility model. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the creation of the present invention.

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] Embodiment 1: A closed-loop buck-boost power supply circuit for high-frequency surgical equipment, such as Figure 1 As shown, it includes a power supply, the power supply is electrically connected to an AC-DC conversion module, the AC-DC conversion module is connected to a power drive module, the power drive module is connected to a voltage regulating output module, the voltage regulating output module is connected to an output port, and a data processing module is electrically connected between the voltage regulating output module and the output port; the data processing module is electrically connected to a micro control unit, and the data processing module is electrically connected to the power drive module.

[0022] The data processing module collects the DC signal X2 at the output port position. After being processed by the data processing module, the DC signal X2 generates a flag signal X3 which is transmitted to the microcontroller unit. The microcontroller unit generates an analog signal X4 by processing the flag signal X3 and feeds it back to the data processing module. The analog signal X4 is then processed by the data processing module to generate a drive signal X1 which is transmitted to the power drive module.

[0023] Embodiment 2: A closed-loop buck-boost power supply circuit for high-frequency surgical equipment, such as Figure 2As shown, the power drive module includes an oscillation circuit chip IC5, and the drive signal X1 is connected to the NAND gate IC10 and the NAND gate IC11 respectively through the chip IC9. The oscillation circuit chip IC5 is electrically connected to the pulse width modulation chip IC1 and the pulse width modulation chip IC2; the pulse width modulation chip IC1 is connected to one of the input ends of the NAND gate IC10, and the pulse width modulation chip IC2 is connected to one of the input ends of the NAND gate IC11. The other input ends of the NAND gate IC10 and the NAND gate IC11 are connected to the drive signal X1 output by the data processing module, and the NAND gate IC10 and the NAND gate IC11 are connected to the drive signal X1 output by the data processing module. The output ends are connected to the output port OUT1 through the transformer T1 and the rectifier circuit, and are also connected to the input port IN2; the driving signal X1 is a square wave signal, and the low level is effective; the oscillation circuit chip IC5 forms an oscillation with a frequency of 300Khz; the pulse width modulation chip IC1 and the pulse width modulation chip IC2 respectively adjust the two output waveform pulse widths of the oscillation circuit chip IC5; the rectifier circuit includes MOS tubes Q5 and MOS tubes Q6, and the 311V direct current is converted into alternating current to supply the voltage regulation output module by periodically switching and closing the MOS tubes Q5 and Q6.

[0024] like Figure 3 As shown, the voltage regulation output module includes an input port IN2, the input port IN2 is connected to a rectifier circuit through a transformer T2, the rectifier circuit is connected to an output port OUT2, the rectifier circuit outputs a DC signal X2, the rectifier circuit includes a rectifier bridge and then a post-stage capacitor rectifier filter circuit, the current passes through a transformer T2, a rectifier bridge and a post-stage capacitor rectifier filter to obtain a stable DC power; the rectifier bridge includes a diode D11, a diode D12, a diode D13 and a diode D14. Wherein the DC signal X2 = (R24 / (R23+R24))*OUT2, OUT2 is the output parameter of the output port OUT2.

[0025] like Figure 4 As shown, the data processing module includes an operational amplifier IC3, which is electrically connected to a pulse width modulation chip IC4, and the pulse width modulation chip IC4 outputs a driving signal X1.

[0026] The pulse width modulation chip IC4 is connected to a delay circuit, which includes a resistor R7 and a capacitor C3. One end of the resistor R7 is connected to the working power supply VDD, and the other end is connected to the pulse width modulation chip IC4. One end of the capacitor C3 is connected between the pulse width modulation chip IC4 and the resistor R7, and the other end is grounded. It is used to adjust the pulse width of the signal. The pulse width modulation chip IC4 is connected to an input end of the NAND gate IC8, and the other input end of the NAND gate IC8 is connected to a switch signal X5. The output end of the NAND gate IC8 outputs a drive signal X1. Other components that are the same as those in Example 1 are connected in series between the pulse width modulation chip IC4 and the NAND gate IC8.

[0027] The power supply adopts 220V mains electricity, and the AC-DC conversion module forms a 311V stable DC power supply through a rectifier bridge and a filter circuit; then the 311V DC power supply is transmitted to the power drive module to form AC power, and then given to the voltage regulation output module for transformer boosting, rectification, and filtering to form a wide voltage DC power to be sent to the output port; at this time, the DC signal X2 collected from the output port is transmitted to the micro control unit through the data processing module to form a flag signal X3, and the AD module of the micro control unit performs data acquisition to obtain the current DC voltage, and the micro control unit forms an analog signal X4 through the DA module and transmits it to the data processing module; at the same time, the analog signal X4 is compared with the DC signal X2 through the operational amplifier IC3, and then the analog signal X4 is ANDed with the switch signal X5 to obtain the drive signal X1, and the drive signal X1 is transmitted to the power drive module to form a closed loop for wide voltage regulation. The utility model can realize the output and adjustment of other DC voltages by replacing the capacitor and diode components.

[0028] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A closed-loop buck-boost power supply circuit for high-frequency surgical equipment, comprising a power supply, characterized in that: The power supply is electrically connected to an AC-DC conversion module, the AC-DC conversion module is connected to a power drive module, the power drive module is connected to a voltage regulating output module, the voltage regulating output module is connected to an output port, and a data processing module is electrically connected between the voltage regulating output module and the output port; the data processing module is electrically connected to a micro control unit, and the data processing module is electrically connected to the power drive module.

2. The closed-loop buck-boost power supply circuit for high-frequency surgical equipment according to claim 1, characterized in that: The power drive module includes an oscillation circuit chip IC5, which is electrically connected to a pulse width modulation chip IC1 and a pulse width modulation chip IC2; the pulse width modulation chip IC1 is connected to one of the input ends of the NAND gate IC10, and the pulse width modulation chip IC2 is connected to one of the input ends of the NAND gate IC11. The other input ends of the NAND gate IC10 and the NAND gate IC11 are connected to the driving signal X1, and the output ends of the NAND gate IC10 and the NAND gate IC11 are both connected to the output port OUT1 through a transformer T1, and are also connected to the input port IN2.

3. The closed-loop buck-boost power supply circuit for high-frequency surgical equipment according to claim 1, characterized in that: The voltage regulating output module includes an input port IN2, the input port IN2 is connected to a rectifier circuit via a transformer T2, the rectifier circuit is connected to an output port OUT2, and the rectifier circuit outputs a DC signal X2.

4. The closed-loop buck-boost power supply circuit for high-frequency surgical equipment according to claim 2, characterized in that: The data processing module includes an operational amplifier IC3, which is electrically connected to a pulse width modulation chip IC4, and the pulse width modulation chip IC4 outputs a driving signal X1.

5. The closed-loop buck-boost power supply circuit for high-frequency surgical equipment according to claim 4, characterized in that: The pulse width modulation chip IC4 is connected with a delay circuit.

6. The closed-loop buck-boost power supply circuit for high-frequency surgical equipment according to claim 5, characterized in that: The delay circuit includes a resistor R7 and a capacitor C3.

7. The closed-loop buck-boost power supply circuit for high-frequency surgical equipment according to claim 6, characterized in that: The pulse width modulation chip IC4 is connected to one input end of the NAND gate IC8, the other input end of the NAND gate IC8 is connected to the switch signal X5, and the output end of the NAND gate IC8 outputs the driving signal X1.

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