A power conversion module based on low voltage input

Abstract

The disclosure provides a low-voltage input-based power conversion module, comprising a second transformer, a second switch unit, a third rectifier unit, a fourth rectifier unit, a fifth rectifier unit and a second control unit; wherein a first end of a primary side winding of the second transformer is connected with a power output end of a low-voltage power supply module, and the second switch unit is connected in series between a second end of the primary side winding of the second transformer and the ground; a power input end of the third rectifier unit is connected with a first secondary side winding of the second transformer; a power input end of the fourth rectifier unit is connected with a second secondary side winding of the second transformer; and a power input end of the fifth rectifier unit is connected with a third secondary side winding of the second transformer; and the second control unit is used for controlling the on-off of the second switch unit. In the low-voltage input-based power conversion module, voltage conversion and isolation are realized, and the safe and stable operation of the winch is ensured.

Description

Technical Field

[0001] This disclosure relates to the field of power conversion technology, and more particularly to a power conversion module based on low-voltage input. Background Technology

[0002] A winch is a mechanical device that uses a drum to wind ropes or cables to pull, lift, or move heavy objects. It is widely used in engineering, navigation, off-road, rescue, and other fields.

[0003] The control power supply of the high-voltage winch is directly stepped down from the high-voltage power supply in the carrier. This makes the control module susceptible to the influence of high-voltage input, resulting in the control system being significantly affected by the power system during winch operation, thus impacting the safe and stable operation of the winch. Therefore, a low-voltage input power conversion module is proposed to isolate the control power supply and the power supply, ensuring their independent operation without mutual interference. Summary of the Invention

[0004] This disclosure aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, the purpose of this disclosure is to provide a power conversion module based on low-voltage input.

[0006] To achieve the above objectives, this disclosure provides a low-voltage input-based power conversion module, comprising: a second transformer, a second switching unit, a third rectifier unit, a fourth rectifier unit, a fifth rectifier unit, and a second control unit; wherein, the first end of the primary winding of the second transformer is connected to the power output terminal of the low-voltage power supply module, and the second switching unit is connected in series between the second end of the primary winding of the second transformer and ground; the power input terminal of the third rectifier unit is connected to the first secondary winding of the second transformer; the power input terminal of the fourth rectifier unit is connected to the second secondary winding of the first transformer; and the power input terminal of the fifth rectifier unit is connected to the third secondary winding of the second transformer; the power input terminal of the second control unit is connected to the power output terminal of the low-voltage power supply module, and the control output terminal of the second control unit is connected to the control input terminal of the second switching unit, wherein the second control unit is used to control the on / off state of the second switching unit.

[0007] Optionally, the second switching unit includes: a second MOSFET; wherein the second MOSFET is N-type, and the drain of the second MOSFET is connected to the second terminal of the primary winding of the second transformer, the source of the second MOSFET is grounded, and the gate of the second MOSFET is connected as the control input terminal of the second switching unit and the control output terminal of the second control unit.

[0008] Optionally, the second control unit includes: a second control chip, a twenty-fifth resistor, a twenty-sixth resistor, and a thirtieth capacitor; wherein, the power input pin of the second control chip serves as the power input terminal of the second control unit and is connected to the power output terminal of the low-voltage power supply module; the first end of the twenty-fifth resistor is connected to the drive output pin of the second control chip, and the second end of the twenty-fifth resistor serves as the control output terminal of the second control unit and is connected to the gate of the second MOS transistor; the first end of the twenty-sixth resistor is connected to the reference voltage pin of the second control chip, and the second end of the twenty-sixth resistor is connected to the oscillator timing resistor-capacitor pin of the second control chip; the first end of the thirtieth capacitor is connected to the second end of the twenty-sixth resistor, and the second end of the thirtieth capacitor is grounded.

[0009] Optionally, the second control unit further includes: a ninth diode, a tenth diode, a twenty-seventh resistor, a thirty-first capacitor, a thirty-second capacitor, and a thirty-third capacitor; wherein, the ninth diode is a Zener diode, and the cathode of the ninth diode is connected to the power output terminal of the low-voltage power supply module; the tenth diode is a Zener diode, and the cathode of the tenth diode is connected to the anode of the ninth diode; the first terminal of the twenty-seventh resistor is connected to the anode of the ninth diode; the first terminal of the thirty-first capacitor is connected to the second terminal of the twenty-seventh resistor, and the second terminal of the thirty-first capacitor is grounded; the first terminal of the thirty-second capacitor is connected to both the first terminal of the thirty-first capacitor and the power input pin of the second control chip, and the second terminal of the thirty-second capacitor is grounded; the first terminal of the thirty-third capacitor is connected to the reference voltage pin of the second control chip, and the second terminal of the thirty-third capacitor is grounded.

[0010] Optionally, the second control unit further includes: a 34th capacitor, a 28th resistor, and an 11th diode; wherein, the first terminal of the 34th capacitor is connected to the power output terminal of the low-voltage power supply module, the first terminal of the 28th resistor is connected to the first terminal of the 34th capacitor, the second terminal of the 28th resistor is connected to the second terminal of the 34th capacitor, the cathode of the 11th diode is connected to the second terminal of the 28th resistor, and the anode of the 11th diode is connected to the drain of the second MOS transistor.

[0011] Optionally, the second control unit further includes: a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, and a thirty-fifth capacitor; wherein, the twenty-ninth resistor is connected in series between the source of the second MOSFET and ground, and the first end of the twenty-ninth resistor is connected to the source of the second MOSFET, and the second end of the twenty-ninth resistor is grounded; the first end of the thirtieth resistor is connected to the first end of the twenty-ninth resistor, and the second end of the thirtieth resistor is connected to the second end of the twenty-ninth resistor; the first end of the thirty-first resistor is connected to the source of the second MOSFET, and the second end of the thirty-first resistor is connected to the current detection pin of the second control chip; the first end of the thirty-fifth capacitor is connected to the second end of the thirty-first resistor, and the second end of the thirty-fifth capacitor is grounded.

[0012] Optionally, the second control unit further includes: a 32nd resistor, a 36th capacitor, a transistor, a 33rd resistor, a 34th resistor, an optocoupler, a 12th diode, a 13th diode, and a 35th resistor; wherein, the first terminal of the 32nd resistor is connected to the reference voltage pin of the second control chip, and the second terminal of the 32nd resistor is connected to the feedback pin of the second control chip; the first terminal of the 36th capacitor is connected to the second terminal of the 32nd resistor, and the second terminal of the 36th capacitor is grounded; the transistor is an NPN type, the collector of the transistor is connected to the second terminal of the 32nd resistor, and the emitter of the transistor is connected to the second terminal of the 36th capacitor; the first terminal of the 33rd resistor is connected to the power supply of the third rectifier unit. The first end of the output terminal is connected, and the first end of the thirty-fourth resistor is connected to the first end of the thirty-third resistor. The anode of the input side of the optocoupler is connected to the second end of the thirty-fourth resistor, and the cathode of the input side of the optocoupler is connected to the second end of the thirty-third resistor. The anode of the twelfth diode is connected to the second end of the power output terminal of the third rectifier unit. The anode of the thirteenth diode is connected to the cathode of the twelfth diode, and the cathode of the thirteenth diode is connected to the cathode of the input side of the optocoupler. The collector of the output side of the optocoupler is connected to the compensation pin of the second control chip. The emitter of the output side of the optocoupler is connected to the base of the transistor. The first end of the thirty-fifth resistor is connected to the base of the transistor, and the second end of the thirty-fifth resistor is grounded.

[0013] Optionally, the third, fourth, and fifth rectifier units each include: a fourteenth diode, a thirty-seventh capacitor, a second voltage regulator chip, a thirty-eighth capacitor, a thirty-ninth capacitor, a fortieth capacitor, a forty-first capacitor, and a fifteenth diode; wherein, the anode of the fourteenth diode in the third rectifier unit is connected to the first terminal of the first secondary winding of the second transformer, the anode of the fourteenth diode in the fourth rectifier unit is connected to the first terminal of the second secondary winding of the second transformer, and the anode of the fourteenth diode in the fifth rectifier unit is connected to the first terminal of the third secondary winding of the second transformer; the first terminal of the thirty-seventh capacitor is connected to the cathode of the fourteenth diode, and the second terminal of the thirty-seventh capacitor in the third rectifier unit is connected to the second terminal of the first secondary winding of the second transformer and grounded, the second terminal of the thirty-seventh capacitor in the fourth rectifier unit is connected to the second terminal of the second secondary winding of the second transformer and grounded, and the second terminal of the thirty-seventh capacitor in the fifth rectifier unit is connected to the second terminal of the third secondary winding of the second transformer and grounded; the output of the second voltage regulator chip... The input terminal is connected to the first terminal of the thirty-seventh capacitor, and the ground terminal of the second voltage regulator chip is grounded. The output terminal of the second voltage regulator chip serves as the first power output terminal of the rectifier unit, outputting a fourth voltage. The first terminal of the thirty-eighth capacitor is connected to the output terminal of the second voltage regulator chip, and the second terminal of the thirty-eighth capacitor is connected to the ground terminal of the second voltage regulator chip. The first terminal of the thirty-ninth capacitor is connected to the ground terminal of the second voltage regulator chip, and the second terminal of the thirty-ninth capacitor is connected to the second terminal of the thirty-seventh capacitor. The first terminal of the fortieth capacitor is connected to the first terminal of the thirty-eighth capacitor, and the second terminal of the fortieth capacitor is connected to the second terminal of the thirty-eighth capacitor. The first terminal of the forty-first capacitor is connected to the first terminal of the thirty-ninth capacitor, and the second terminal of the forty-first capacitor is connected to the second terminal of the thirty-ninth capacitor. The fifteenth diode is a voltage regulator diode, and the anode of the fifteenth diode is connected to the second terminal of the forty-first capacitor, and the cathode of the fifteenth diode is connected to the first terminal of the forty-first capacitor. The anode of the fifteenth diode serves as the second power output terminal of the rectifier unit, outputting a third voltage.

[0014] Optionally, the conversion module further includes: a third control chip, a thirty-sixth resistor, a fifth inductor, a forty-second capacitor, a sixteenth diode, and a forty-third capacitor; wherein, the power input pin of the third control chip is connected to the power output pin of the low-voltage power supply module, and the first end of the thirty-sixth resistor is connected to the power input pin of the third control chip, and the second end of the thirty-sixth resistor is connected to the soft-start capacitor pin, the peak current limiting pin, and the duty cycle control pin of the third control chip; the first end of the fifth inductor is connected to the feedback pin of the third control chip, and the second end of the fifth inductor is grounded; the first end of the forty-second capacitor is connected to the timing capacitor pin of the third control chip, and the second end of the forty-second capacitor is connected to the ground pin of the third control chip; the sixteenth diode is a Zener diode, and the cathode of the sixteenth diode is connected to the first end of the fifth inductor; the first end of the forty-third capacitor is connected to the anode of the sixteenth diode and the second end of the forty-second capacitor, and the second end of the forty-third capacitor is connected to the second end of the fifth inductor; the first end of the forty-third capacitor outputs a third voltage.

[0015] Optionally, the conversion module further includes a 37th resistor and a 38th resistor; wherein, the first end of the 37th resistor is connected to the current detection input pin of the third control chip, and the second end of the 37th resistor is connected to the second end of the fifth inductor, the first end of the 38th resistor is connected to the first end of the 37th resistor, and the second end of the 38th resistor is connected to the ground pin of the third control chip.

[0016] The technical solution provided in this disclosure may include the following beneficial effects:

[0017] By controlling the on / off state of the second switching unit through the second control unit, and through rectification by the third, fourth, and fifth rectifier units, voltage conversion and isolation are achieved. Thus, when the power conversion module is applied to the power supply circuit between the high-voltage power supply and the winch, it can work with other modules to achieve direct power supply from the high-voltage power supply to the winch, thereby eliminating the need for components and lines between the high-voltage and low-voltage power supplies. This reduces the cost and failure rate of the winch power supply and makes the winch operation less susceptible to the influence of the high-voltage section. The two are independent and do not interfere with each other, thus ensuring the safe and stable operation of the winch.

[0018] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 This is a circuit diagram of a power conversion module based on low-voltage input according to an embodiment of the present disclosure;

[0021] Figure 2 This is a circuit diagram of the third rectifier unit in a power conversion module based on low-voltage input according to an embodiment of this disclosure;

[0022] Figure 3 This is a circuit diagram of the third control chip in a power conversion module based on low-voltage input according to an embodiment of this disclosure;

[0023] As shown in the figure: 111, second switching unit; 112, third rectifier unit; 113, second control unit;

[0024] L5, the fifth inductor;

[0025] R25, the 25th resistor; R26, the 26th resistor; R27, the 27th resistor; R28, the 28th resistor; R29, the 29th resistor; R30, the 30th resistor; R31, the 31st resistor; R32, the 32nd resistor; R33, the 33rd resistor; R34, the 34th resistor; R35, the 35th resistor; R36, the 36th resistor; R37, the 37th resistor; R38, the 38th resistor.

[0026] C30, 30th capacitor; C31, 31st capacitor; C32, 32nd capacitor; C33, 33rd capacitor; C34, 34th capacitor; C35, 35th capacitor; C36, 36th capacitor; C37, 37th capacitor; C38, 38th capacitor; C39, 39th capacitor; C40, 40th capacitor; C41, 41st capacitor; C42, 42nd capacitor; C43, 43rd capacitor;

[0027] D9, Ninth diode; D10, Tenth diode; D11, Eleventh diode; D12, Twelfth diode; D13, Thirteenth diode; D14, Fourteenth diode; D15, Fifteenth diode; D16, Sixteenth diode.

[0028] U5, second control chip; U6, second voltage regulator chip; U7, third control chip;

[0029] T2, the second transformer;

[0030] Q2, the second MOSFET; Q3, the transistor.

[0031] P1, Optical Coupler. Detailed Implementation

[0032] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0033] like Figure 1 As shown in the figure, this disclosure proposes a power conversion module based on low-voltage input, including: a second transformer T2, a second switching unit 111, a third rectifier unit 112 (not shown in the figure), a fourth rectifier unit (not shown in the figure), a fifth rectifier unit (not shown in the figure), and a second control unit 113. The first end of the primary winding of the second transformer T2 is connected to the power output terminal of the low-voltage power supply module, and the second switching unit 111 is connected in series between the second end of the primary winding of the second transformer T2 and ground. The power input terminal of the third rectifier unit 112 is connected to the first secondary winding of the second transformer T2. The power input terminal of the fourth rectifier unit is connected to the second secondary winding of the first transformer. The power input terminal of the fifth rectifier unit is connected to the third secondary winding of the second transformer T2. The power input terminal of the second control unit 113 is connected to the power output terminal of the low-voltage power supply module, and the control output terminal of the second control unit 113 is connected to the control input terminal of the second switching unit 111. The second control unit 113 is used to control the on / off state of the second switching unit 111.

[0034] Understandably, since the first end of the primary winding of the second transformer T2 is connected to the power output terminal of the low-voltage power supply module, and the second switch unit 111 is connected in series between the second end of the primary winding of the second transformer T2 and ground, the second switch unit 111 can control the opening and closing of the path between the power output terminal of the low-voltage power supply module and the primary winding of the second transformer T2. Furthermore, since the power input terminal of the second control unit 113 is connected to the power output terminal of the low-voltage power supply module, and the control output terminal of the second control unit 113 is connected to the control input terminal of the second switch unit 111, the second control unit 113 can control the opening and closing of the second switch unit 111 under the power supply of the low-voltage power supply module, thereby realizing the opening and closing of the first secondary winding, the second secondary winding, and the third secondary winding of the second transformer T2. The high-frequency AC output is achieved by the third rectifier unit 112, which is connected to the first secondary winding of the second transformer T2, the fourth rectifier unit, which is connected to the second secondary winding of the first transformer, and the fifth rectifier unit, which is connected to the third secondary winding of the second transformer T2. This allows the third rectifier unit 112 to rectify the high-frequency AC output from the first secondary winding of the second transformer T2, thereby outputting the third and fourth voltages. The fourth rectifier unit is also able to rectify the high-frequency AC output from the second secondary winding of the second transformer T2, thereby outputting the third and fourth voltages. Furthermore, the fifth rectifier unit is able to rectify the high-frequency AC output from the third secondary winding of the second transformer T2, thereby outputting the third and fourth voltages.

[0035] By controlling the on / off state of the second switching unit 111 through the second control unit 113, and through the rectification of the third rectifier unit 112, the fourth rectifier unit, and the fifth rectifier unit, voltage conversion and isolation are achieved. Thus, when the power conversion module is applied to the power supply circuit between the high-voltage power supply and the winch, it can work with other modules to achieve direct power supply of the winch from the high-voltage power supply, thereby eliminating the need for components and lines configured between the high-voltage power supply and the low-voltage power supply, thereby reducing the cost and failure rate of the winch power supply, and making the winch operation less susceptible to the influence of the high-voltage part. The two are independent and do not interfere with each other, thus ensuring the safe and stable operation of the winch.

[0036] It should be noted that the second transformer T2 is used for voltage conversion. The second transformer T2 has a primary winding, a first secondary winding, a second secondary winding, and a third secondary winding. When the primary winding is energized, the first secondary winding, the second secondary winding, and the third secondary winding output three isolated power supplies respectively. The specific type of the second transformer T2 can be set according to actual needs and there are no restrictions on it.

[0037] The second switching unit 111 is used to control the connection and disconnection of the power output terminal of the low-voltage power supply module and the primary winding of the second transformer T2. Through the connection and disconnection control, the high-frequency AC output of the secondary winding of the second transformer T2 is realized. The specific type of the second switching unit 111 can be set according to actual needs and there is no limitation. For example, the second switching unit 111 can be a MOSFET, etc.

[0038] The third rectifier unit 112 is used to rectify the electrical energy output from the first and second secondary windings of the second transformer T2, so as to output the third and fourth voltages required by the power supply circuit between the high-voltage power supply and the winch. The specific type of the third rectifier unit 112 can be set according to actual needs and there are no restrictions on it.

[0039] The fourth rectifier unit is used to rectify the electrical energy output from the second secondary winding of the second transformer T2, so as to output the third and fourth voltages required by the power supply circuit between the high-voltage power supply and the winch. The specific type of the fourth rectifier unit can be set according to actual needs and there are no restrictions on it.

[0040] The fifth rectifier unit is used to rectify the output power of the third secondary winding of the second transformer T2 to output the third and fourth voltages required by the power supply circuit between the high-voltage power supply and the winch. The specific type of the fifth rectifier unit can be set according to actual needs and there are no restrictions on it.

[0041] The second control unit 113 is used to control the on / off state of the second switching unit 111, so that the power output terminals of the third rectifier unit 112, the fourth rectifier unit, and the fifth rectifier unit output the third voltage and the fourth voltage, respectively. The specific type of the second control unit 113 can be set according to actual needs and is not limited thereto.

[0042] The specific type of low-voltage power supply module can be set according to actual needs, and there are no restrictions on it. For example, the low-voltage power supply module can be a power conversion module based on high-voltage input, which converts the high voltage of the high-voltage power supply to a low voltage of 24V.

[0043] like Figure 1 As shown, in some embodiments, the second switching unit 111 includes a second MOSFET Q2. The second MOSFET Q2 is N-type, and its drain is connected to the second terminal of the primary winding of the second transformer T2. The source of the second MOSFET Q2 is grounded, and its gate is connected as the control input terminal of the second switching unit 111 and the control output terminal of the second control unit 113.

[0044] It is understandable that, since the drain of the second MOSFET Q2 is connected to the second terminal of the primary winding of the second transformer T2, and the source of the second MOSFET Q2 is grounded, the gate of the second MOSFET Q2 is connected as the control input terminal of the second switching unit 111 and the control output terminal of the second control unit 113, so that the second control unit 113 can control the gate voltage of the second MOSFET Q2, thereby controlling the switching of the drain and source of the second MOSFET Q2, and thus realizing the high-frequency AC output of the first secondary winding, the second secondary winding and the third secondary winding of the second transformer T2.

[0045] It should be noted that the second MOSFET Q2, as a switching device, is turned on and off under the control of the second control unit 113, thereby realizing the high-frequency AC output of the second transformer T2. The specific type of the second MOSFET Q2 can be set according to actual needs and there are no restrictions on it.

[0046] A MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) is a semiconductor device that uses an electric field effect to control current. The gate (G) of a MOSFET is controlled to turn on the channel by applying a voltage, the source (S) is the input terminal by applying charge carriers (electrons or holes), and the drain (D) is the output terminal of the charge carriers.

[0047] like Figure 1 As shown, in some embodiments, the second control unit 113 includes: a second control chip U5, a twenty-fifth resistor R25, a twenty-sixth resistor R26, and a thirtieth capacitor C30. The power input pin of the second control chip U5 serves as the power input terminal of the second control unit 113 and is connected to the power output terminal of the low-voltage power supply module. The first end of the twenty-fifth resistor R25 is connected to the drive output pin of the second control chip U5, and the second end of the twenty-fifth resistor R25 serves as the control output terminal of the second control unit 113 and is connected to the gate of the second MOS transistor Q2. The first end of the twenty-sixth resistor R26 is connected to the reference voltage pin of the second control chip U5, and the second end of the twenty-sixth resistor R26 is connected to the oscillator timing resistor / capacitor pin of the second control chip U5. The first end of the thirtieth capacitor C30 is connected to the second end of the second sixteenth resistor R26, and the second end of the thirtieth capacitor C30 is grounded.

[0048] Understandably, since the power input pin of the second control chip U5 serves as the power input terminal of the second control unit 113 and is connected to the power output terminal of the low-voltage power supply module, the low-voltage power supply module can supply power to the second control chip U5, thereby ensuring the stable operation of the second control chip U5.

[0049] Since the first end of the 25th resistor R25 is connected to the drive output pin of the second control chip U5, and the second end of the 25th resistor R25 serves as the control output terminal of the second control unit 113 and is connected to the gate of the second MOS transistor Q2, the second control chip U5 can use the 25th resistor R25 to control the gate voltage of the second MOS transistor Q2, thereby controlling the on / off state of the drain and source of the second MOS transistor Q2.

[0050] Since the first terminal of the 26th resistor R26 is connected to the reference voltage pin of the second control chip U5, and the second terminal of the 26th resistor R26 is connected to the oscillator timing resistor and capacitor pin of the second control chip U5, and the first terminal of the 30th capacitor C30 is connected to the second terminal of the 26th resistor R26, and the second terminal of the 30th capacitor C30 is grounded, the 26th resistor R26 and the 30th capacitor C30 form an oscillation circuit under the switching control of the second control chip U5, thereby ensuring the precise control of the second MOSFET Q2 by the second control chip U5.

[0051] It should be noted that the second control chip U5 is used to control the on / off state of the second MOSFET Q2. The specific type of the second control chip U5 can be set according to actual needs and is not limited thereto. For example, the second control chip U5 can be a UC3842 chip. The second control chip U5 has a first pin (compensation pin), a second pin (feedback pin), a third pin (current detection pin), a fourth pin (oscillator timing resistor and capacitor pin), a fifth pin (ground pin), a sixth pin (drive output pin), a seventh pin (power input pin), and an eighth pin (reference voltage pin).

[0052] The specific type of resistor R25 can be set according to actual needs, and there are no restrictions on it.

[0053] The specific type of the 26th resistor R26 can be set according to actual needs and there are no restrictions on it. For example, the 26th resistor R26 can be 10K.

[0054] The specific type of the thirtieth capacitor C30 can be set according to actual needs and there are no restrictions on it. For example, the thirtieth capacitor C30 can be 2200pF.

[0055] like Figure 1 As shown, in some embodiments, the second control unit 113 further includes: a ninth diode D9, a tenth diode D10, a twenty-seventh resistor R27, a thirty-first capacitor C31, a thirty-second capacitor C32, and a thirty-third capacitor C33.

[0056] Among them, the ninth diode D9 is a Zener diode, and the cathode of the ninth diode D9 is connected to the power output terminal of the low-voltage power supply module; the tenth diode D10 is a Zener diode, and the cathode of the tenth diode D10 is connected to the anode of the ninth diode D9; the first terminal of the twenty-seventh resistor R27 is connected to the anode of the ninth diode D9; the first terminal of the thirty-first capacitor C31 is connected to the second terminal of the twenty-seventh resistor R27, and the second terminal of the thirty-first capacitor C31 is grounded; the first terminal of the thirty-second capacitor C32 is connected to the first terminal of the thirty-first capacitor C31 and the power input pin of the second control chip U5, and the second terminal of the thirty-second capacitor C32 is grounded; the first terminal of the thirty-third capacitor C33 is connected to the reference voltage pin of the second control chip U5, and the second terminal of the thirty-third capacitor C33 is grounded.

[0057] It is understandable that, since the cathode of the ninth diode D9 is connected to the power output terminal of the low-voltage power supply module, and the cathode of the tenth diode D10 is connected to the anode of the ninth diode D9, and the first terminal of the twenty-seventh resistor R27 is connected to the anode of the ninth diode D9, the power output terminal of the low-voltage power supply module can achieve voltage clamping by the cooperation of the ninth diode D9 and the tenth diode D10, and can achieve stable power supply to the second control chip U5 by the twenty-seventh resistor R27.

[0058] Since the first terminal of the thirty-first capacitor C31 is connected to the second terminal of the twenty-seventh resistor R27, and the second terminal of the thirty-first capacitor C31 is grounded, the first terminal of the thirty-second capacitor C32 is connected to the first terminal of the thirty-first capacitor C31 and the power input pin of the second control chip U5, and the second terminal of the thirty-second capacitor C32 is grounded, the power input pin of the second control chip U5 can achieve voltage regulation and filtering using the thirty-first capacitor C31 and the thirty-second capacitor C32, thereby ensuring the stable operation of the second control chip U5.

[0059] Since the first terminal of the 33rd capacitor C33 is connected to the reference voltage pin of the second control chip U5, and the second terminal of the 33rd capacitor C33 is grounded, the reference voltage pin of the second control chip U5 can use the 33rd capacitor C33 to achieve voltage regulation and filtering, thereby ensuring the stable operation of the second control chip U5.

[0060] It should be noted that the ninth diode D9 and the tenth diode D10 are Zener diodes, used for voltage clamping between the power output terminal of the low-voltage power supply module and the power input pin of the second control chip U5. The specific types of the ninth diode D9 and the tenth diode D10 can be set according to actual needs and there are no restrictions on them.

[0061] The specific type of resistor R27 can be set according to actual needs, and there are no restrictions on it.

[0062] The specific types of capacitors C31 (thirty-first), C32 (thirty-second), and C33 (thirty-third) can be set according to actual needs and are not restricted. For example, capacitor C31 (thirty-first) can be 100μF, capacitor C32 (thirty-second) can be 0.1μF, and capacitor C33 (thirty-third) can be 0.1μF.

[0063] like Figure 1 As shown, in some embodiments, the second control unit 113 further includes: a thirty-fourth capacitor C34, a twenty-eighth resistor R28, and an eleventh diode D11.

[0064] Among them, the first end of the thirty-fourth capacitor C34 is connected to the power output terminal of the low-voltage power supply module, and the first end of the twenty-eighth resistor R28 is connected to the first end of the thirty-fourth capacitor C34. The second end of the twenty-eighth resistor R28 is connected to the second end of the thirty-fourth capacitor C34. The cathode of the eleventh diode D11 is connected to the second end of the twenty-eighth resistor R28. The anode of the eleventh diode D11 is connected to the drain of the second MOS transistor Q2.

[0065] It is understandable that, since the first terminal of the 34th capacitor C34 is connected to the power output terminal of the low-voltage power supply module, and the first terminal of the 28th resistor R28 is connected to the first terminal of the 34th capacitor C34, the second terminal of the 28th resistor R28 is connected to the second terminal of the 34th capacitor C34, the cathode of the 11th diode D11 is connected to the second terminal of the 28th resistor R28, and the anode of the 11th diode D11 is connected to the drain of the second MOSFET Q2, the 34th capacitor C34, the 28th resistor R28, and the 11th diode D11 form an absorption circuit, which can absorb voltage spikes and ensure the stable operation of the second transformer T2.

[0066] It should be noted that the specific type of the 34th capacitor C34 can be set according to actual needs, and there is no restriction on it. For example, the 34th capacitor C34 can be 4700pF.

[0067] The specific type of the 28th resistor R28 can be set according to actual needs and there are no restrictions on it. For example, the 28th resistor R28 can be 1K.

[0068] The eleventh diode D11 is used for unidirectional conduction along the direction from the drain of the second MOSFET Q2 to the second terminal of the twenty-eighth resistor R28. The specific type of the eleventh diode D11 can be set according to actual needs and there are no restrictions on it.

[0069] like Figure 1As shown, in some embodiments, the second control unit 113 further includes: a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, and a thirty-fifth capacitor C35.

[0070] Among them, the twenty-ninth resistor R29 is connected in series between the source of the second MOSFET Q2 and ground, and the first end of the twenty-ninth resistor R29 is connected to the source of the second MOSFET Q2, and the second end of the twenty-ninth resistor R29 is grounded. The first end of the thirtieth resistor R30 is connected to the first end of the second nineteenth resistor R29, and the second end of the thirtieth resistor R30 is connected to the second end of the second nineteenth resistor R29. The first end of the thirty-first resistor R31 is connected to the source of the second MOSFET Q2, and the second end of the thirty-first resistor R31 is connected to the current detection pin of the second control chip U5. The first end of the thirty-fifth capacitor C35 is connected to the second end of the thirty-first resistor R31, and the second end of the thirty-fifth capacitor C35 is grounded.

[0071] It is understandable that, since the 29th resistor R29 is connected in series between the source of the second MOSFET Q2 and ground, and the first end of the 30th resistor R30 is connected to the first end of the 29th resistor R29, the second end of the 30th resistor R30 is connected to the second end of the 29th resistor R29, the first end of the 31st resistor R31 is connected to the source of the second MOSFET Q2, the second end of the 31st resistor R31 is connected to the current detection pin of the second control chip U5, and the first end of the 35th capacitor C35 is connected to the second end of the 31st resistor R31, and the second end of the 35th capacitor C35 is grounded, the current detection pin of the second control chip U5 can use the cooperation of the 29th resistor R29, the 30th resistor R30, the 31st resistor R31 and the 35th capacitor C35 to collect the current of the second MOSFET Q2, thereby realizing overcurrent protection of the second MOSFET Q2 based on the collected current of the second MOSFET Q2, and ensuring the stable operation of the power conversion module.

[0072] It should be noted that the specific type of the 35th capacitor C35 can be set according to actual needs, and there are no restrictions on it. For example, the 35th capacitor C35 can be 470pF.

[0073] The specific types of the twenty-ninth resistor R29 and the thirtieth resistor R30 can be set according to actual needs, and there are no restrictions on them.

[0074] The specific type of the 31st resistor R31 can be set according to actual needs and there are no restrictions on it. For example, the 31st resistor R31 can be 1K.

[0075] like Figure 1As shown, in some embodiments, the second control unit 113 further includes: a 32nd resistor R32, a 36th capacitor C36, a transistor Q3, a 33rd resistor R33, a 34th resistor R34, an optocoupler P1, a 12th diode D12, a 13th diode D13, and a 35th resistor R35.

[0076] Among them, the first terminal of the thirty-second resistor R32 is connected to the reference voltage pin of the second control chip U5, and the second terminal of the thirty-second resistor R32 is connected to the feedback pin of the second control chip U5. The first terminal of the thirty-sixth capacitor C36 is connected to the second terminal of the thirty-second resistor R32, and the second terminal of the thirty-sixth capacitor C36 is grounded. Transistor Q3 is an NPN type, and the collector of transistor Q3 is connected to the second terminal of the thirty-second resistor R32, and the emitter of transistor Q3 is connected to the second terminal of the thirty-sixth capacitor C36. The first terminal of the thirty-third resistor R33 is connected to the first terminal of the power output of the third rectifier unit 112, and the first terminal of the thirty-fourth resistor R34 is connected to the first terminal of the thirty-third resistor R33. The input anode of optocoupler P1 is connected to the second terminal of the 34th resistor R34, and the input cathode of optocoupler P1 is connected to the second terminal of the 33rd resistor R33. The anode of the 12th diode D12 is connected to the second terminal of the power output terminal of the third rectifier unit 112. The anode of the 13th diode D13 is connected to the cathode of the 12th diode D12, and the cathode of the 13th diode D13 is connected to the input cathode of optocoupler P1. The output collector of optocoupler P1 is connected to the compensation pin of the second control chip U5. The output emitter of optocoupler P1 is connected to the base of transistor Q3. The first terminal of the 35th resistor R35 is connected to the base of transistor Q3, and the second terminal of the 35th resistor R35 is grounded.

[0077] It is understandable that the power output terminal of the third rectifier unit 112 supplies power to the input terminal of the optocoupler P1 through the cooperation of the thirty-third resistor R33 and the thirty-fourth resistor R34, as well as the twelfth diode D12 and the thirteenth diode D13. When the input voltage of the optocoupler P1 rises to the preset voltage, the output terminal of the optocoupler P1 is turned on, thereby realizing feedback to the compensation pin of the second control chip U5. This allows the second control chip U5 to control the duty cycle of the output pin according to the voltage of the compensation pin, thereby achieving accurate voltage output.

[0078] Furthermore, when the output terminal of optocoupler P1 is turned on, the emitter and collector of transistor Q3 are turned on, and the thirty-sixth capacitor C36 is short-circuited. When the output terminal of optocoupler P1 is not turned on, transistor Q3 is turned off, which causes the reference voltage pin of the second control chip U5 to charge the thirty-sixth capacitor C36 through the thirty-second resistor R32 until the feedback pin voltage of the second control chip U5 rises to the critical voltage. At this point, the output pin of the second control chip U5 stops outputting, thus achieving device protection and avoiding damage.

[0079] It should be noted that the specific types of resistors R32 (thirty-second), R33 (thirty-third), R34 (thirty-fourth), and R35 (thirty-fifth) can be set according to actual needs and there are no restrictions. For example, resistor R32 (thirty-second) can be 47K, resistor R33 (thirty-third) can be 1K, resistor R34 (thirty-fourth) can be 2K, and resistor R35 (thirty-fifth) can be 1K.

[0080] The specific type of the thirty-sixth capacitor C36 can be set according to actual needs and there are no restrictions on it. For example, the thirty-sixth capacitor C36 can be 0.1μF.

[0081] Transistor Q3 is used in conjunction with capacitor C36 to achieve linkage with optocoupler P1, thereby protecting the second control chip U5. The specific type of transistor Q3 can be set according to actual needs and is not restricted.

[0082] Optocoupler P1 is used for isolation and voltage feedback between the second control chip U5 and the third rectifier unit 112. The specific type of optocoupler P1 can be set according to actual needs and there are no restrictions on it.

[0083] The twelfth diode D12 is used for unidirectional conduction along the direction from the second terminal of the power output terminal of the third rectifier unit 112 to the anode of the thirteenth diode D13. The thirteenth diode D13 is used for unidirectional conduction along the direction from the cathode of the twelfth diode D12 to the cathode of the input side of the optocoupler P1. The specific types of the twelfth diode D12 and the thirteenth diode D13 can be set according to actual needs and there are no restrictions on them.

[0084] like Figure 2 As shown, in some embodiments, the third rectifier unit 112, the fourth rectifier unit, and the fifth rectifier unit respectively include: the fourteenth diode D14, the thirty-seventh capacitor C37, the second voltage regulator chip U6, the thirty-eighth capacitor C38, the thirty-ninth capacitor C39, the fortieth capacitor C40, the forty-first capacitor C41, and the fifteenth diode D15.

[0085] In this system, the anode of the fourteenth diode D14 in the third rectifier unit 112 is connected to the first terminal of the first secondary winding of the second transformer T2; the anode of the fourteenth diode D14 in the fourth rectifier unit is connected to the first terminal of the second secondary winding of the second transformer T2; and the anode of the fourteenth diode D14 in the fifth rectifier unit is connected to the first terminal of the third secondary winding of the second transformer T2. The first terminal of the thirty-seventh capacitor C37 is connected to the cathode of the fourteenth diode D14, and the second terminal of the thirty-seventh capacitor C37 in the third rectifier unit 112 is connected to the second terminal of the first secondary winding of the second transformer T2 and grounded; the second terminal of the thirty-seventh capacitor C37 in the fourth rectifier unit is connected to the second terminal of the second secondary winding of the second transformer T2 and grounded; and the second terminal of the thirty-seventh capacitor C37 in the fifth rectifier unit is connected to the second terminal of the third secondary winding of the second transformer T2 and grounded. The input terminal of the second voltage regulator chip U6 is connected to the first terminal of the thirty-seventh capacitor C37, and the ground terminal of the second voltage regulator chip U6 is grounded. The output terminal of the second voltage regulator chip U6 serves as the rectifier unit. The first power output terminal of the rectifier unit outputs the fourth voltage; the first terminal of the thirty-eighth capacitor C38 is connected to the output terminal of the second voltage regulator chip U6, and the second terminal of the thirty-eighth capacitor C38 is connected to the ground terminal of the second voltage regulator chip U6; the first terminal of the thirty-ninth capacitor C39 is connected to the ground terminal of the second voltage regulator chip U6, and the second terminal of the thirty-ninth capacitor C39 is connected to the second terminal of the thirty-seventh capacitor C37; the first terminal of the fortieth capacitor C40 is connected to the first terminal of the thirty-eighth capacitor C38, and the second terminal of the fortieth capacitor C40 is connected to the second terminal of the thirty-eighth capacitor C38; the first terminal of the forty-first capacitor C41 is connected to the first terminal of the thirty-ninth capacitor C39, and the second terminal of the forty-first capacitor C41 is connected to the second terminal of the thirty-ninth capacitor C39; the fifteenth diode D15 is a Zener diode, and the anode of the fifteenth diode D15 is connected to the second terminal of the forty-first capacitor C41, and the cathode of the fifteenth diode D15 is connected to the first terminal of the forty-first capacitor C41; the anode of the fifteenth diode D15 serves as the second power output terminal of the rectifier unit, outputting the third voltage.

[0086] Understandably, for the third rectifier unit 112, the high-frequency AC power output from the first secondary winding of the first transformer is rectified by the fourth diode. In addition, in conjunction with the thirty-seventh capacitor C37, the second voltage regulator chip U6, the thirty-eighth capacitor C38, the thirty-ninth capacitor C39, the fortieth capacitor C40, the forty-first capacitor C41, and the fifteenth diode D15, the third and fourth voltages are output, thereby meeting the power requirements of the winch motor drive module.

[0087] For the fourth rectifier unit, the high-frequency AC power output from the second secondary winding of the first transformer is rectified by the fourth diode. In addition, in conjunction with the thirty-seventh capacitor C37, the second voltage regulator chip U6, the thirty-eighth capacitor C38, the thirty-ninth capacitor C39, the fortieth capacitor C40, the forty-first capacitor C41, and the fifteenth diode D15, the third and fourth voltages are output, thereby meeting the power requirements of the winch motor drive module.

[0088] For the fifth rectifier unit, the high-frequency AC power output from the third secondary winding of the first transformer is rectified by the fourth diode. In addition, in conjunction with the thirty-seventh capacitor C37, the second voltage regulator chip U6, the thirty-eighth capacitor C38, the thirty-ninth capacitor C39, the fortieth capacitor C40, the forty-first capacitor C41, and the fifteenth diode D15, the third and fourth voltages are output, thereby meeting the power requirements of the winch motor drive module.

[0089] The voltage conversion of the second transformer T2, along with the cooperation of the third rectifier unit 112, the fourth rectifier unit, and the fifth rectifier unit, enables three isolated third and fourth voltages, thereby ensuring the safe and stable operation of the winch motor drive module.

[0090] It should be noted that the fourteenth diode D14 is used for unidirectional conduction along the direction from the first end of the secondary winding of the second transformer T2 to the first end of the thirty-seventh capacitor C37, and the fifteenth diode D15 is used for unidirectional conduction along the direction from the second end of the forty-first capacitor C41 to the first end of the forty-first capacitor C41. The specific types of the fourteenth diode D14 and the fifteenth diode D15 can be set according to actual needs, and there are no restrictions on this.

[0091] The specific types of capacitors C37 (37), C38 (38), C39 (39), C40 (40), and C41 (41) can be set according to actual needs and are not restricted. For example, capacitor C37 can be 100μF, capacitor C38 can be 100μF, capacitor C39 can be 100μF, capacitor C40 can be 0.1μF, and capacitor C41 can be 0.1μF.

[0092] The specific type of the second voltage regulator chip U6 can be set according to actual needs and there is no restriction. For example, the second voltage regulator chip U6 can be a 7815 chip. The second voltage regulator chip U6 has a first pin (input pin), a second pin (ground pin) and a third pin (output pin).

[0093] Among them, the first end of the thirty-third resistor R33 can be connected to the input end of the second voltage regulator chip U6, and the anode of the twelfth diode D12 can be connected to the second end of the thirty-seventh capacitor C37.

[0094] like Figure 3 As shown, in some embodiments, the conversion module further includes: a third control chip U7, a thirty-sixth resistor R36, a fifth inductor L5, a forty-second capacitor C42, a sixteenth diode D16, and a forty-third capacitor C43.

[0095] Among them, the power input pin of the third control chip U7 is connected to the power output terminal of the low-voltage power supply module, and the first end of the thirty-sixth resistor R36 is connected to the power input pin of the third control chip U7. The second end of the thirty-sixth resistor R36 is connected to the soft-start capacitor pin, the peak current limiting pin, and the duty cycle control pin of the third control chip U7, respectively. The first end of the fifth inductor L5 is connected to the feedback pin of the third control chip U7, and the second end of the fifth inductor L5 is grounded. The first end of the forty-second capacitor C42 is connected to the timing capacitor pin of the third control chip U7, and the second end of the forty-second capacitor C42 is connected to the ground pin of the third control chip U7. The sixteenth diode D16 is a Zener diode. The cathode of the sixteenth diode D16 is connected to the first end of the fifth inductor L5. The first end of the forty-third capacitor C43 is connected to the anode of the sixteenth diode D16 and the second end of the forty-second capacitor C42, respectively. The second end of the forty-third capacitor C43 is connected to the second end of the fifth inductor L5. The first end of the forty-third capacitor C43 outputs the third voltage.

[0096] It is understandable that since the power input pin of the third control chip U7 is connected to the power output terminal of the low-voltage power supply module, the low-voltage power supply module can supply power to the third control chip U7, thereby ensuring the stable operation of the third control chip U7.

[0097] Since the second end of the thirty-sixth resistor R36 is connected to the soft-start capacitor pin, the peak current limit pin, and the duty cycle control pin of the third control chip U7 respectively, the low-voltage power supply module can use the thirty-sixth resistor R36 to supply power to the soft-start capacitor pin, the peak current limit pin, and the duty cycle control pin of the third control chip U7, thereby ensuring the stable operation of the third control chip U7.

[0098] The third control chip U7 utilizes the cooperation of the fifth inductor L5, the forty-second capacitor C42, the sixteenth diode D16, and the forty-third capacitor C43 to achieve the output of the third voltage, thereby meeting the power requirements of the winch motor drive module.

[0099] It should be noted that the third control chip U7 is used to control the charging and discharging of the fifth inductor L5, the forty-second capacitor C42, and the forty-third capacitor C43, realizing the conversion of the low-voltage power supply module's output voltage to the third voltage. The specific type of the third control chip U7 can be set according to actual needs and is not limited thereto. For example, the third control chip U7 can be an MC33063 chip. The third control chip U7 has a first pin (soft-start capacitor pin), a second pin (feedback pin), a third pin (timing capacitor pin), a fourth pin (ground pin), a fifth pin (current detection input pin), a sixth pin (power input pin), a seventh pin (peak current limit pin), and an eighth pin (duty cycle control pin).

[0100] The specific type of the thirty-sixth resistor R36 can be set according to actual needs and there are no restrictions on it. For example, the thirty-sixth resistor R36 can be 1R.

[0101] The specific type of the fifth inductor L5 can be set according to actual needs and there are no restrictions on it. For example, the fifth inductor L5 can be 22μH.

[0102] The specific types of capacitors C42 (forty-second) and C43 (forty-third) can be set according to actual needs and are not restricted. For example, capacitor C42 (forty-second) can be 1000pF and capacitor C43 (forty-third) can be 100μF.

[0103] The sixteenth diode D16 is used for unidirectional conduction along the direction from the first terminal of the forty-third capacitor C43 to the first terminal of the fifth inductor L5. The specific type of the sixteenth diode D16 can be set according to actual needs and there is no restriction on it.

[0104] like Figure 3 As shown, in some embodiments, the conversion module further includes a 37th resistor R37 and a 38th resistor R38. The first terminal of the 37th resistor R37 is connected to the current detection input pin of the third control chip U7, and the second terminal of the 37th resistor R37 is connected to the second terminal of the fifth inductor L5. The first terminal of the 38th resistor R38 is connected to the first terminal of the 37th resistor R37, and the second terminal of the 38th resistor R38 is connected to the ground pin of the third control chip U7.

[0105] Understandably, since the first end of the thirty-seventh resistor R37 is connected to the current detection input pin of the third control chip U7, and the second end of the thirty-seventh resistor R37 is connected to the second end of the fifth inductor L5, the first end of the thirty-eighth resistor R38 is connected to the first end of the thirty-seventh resistor R37, and the second end of the thirty-eighth resistor R38 is connected to the ground pin of the third control chip U7, the third control chip U7 can use the voltage divider of the thirty-seventh resistor R37 and the thirty-eighth resistor R38 to sample the output voltage, thereby facilitating closed-loop control and ensuring accurate voltage output.

[0106] It should be noted that the specific types of the thirty-seventh resistor R37 and the thirty-eighth resistor R38 can be set according to actual needs, and there are no restrictions on this. For example, the thirty-seventh resistor R37 can be 4.7K and the thirty-eighth resistor R38 can be 1K.

[0107] In the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0108] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0109] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0110] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A power conversion module based on low-voltage input, characterized in that, include: The second transformer, the second switching unit, the third rectifier unit, the fourth rectifier unit, the fifth rectifier unit, and the second control unit; The first end of the primary winding of the second transformer is connected to the power output terminal of the low-voltage power supply module, and the second switching unit is connected in series between the second end of the primary winding of the second transformer and ground. The power input terminal of the third rectifier unit is connected to the first secondary winding of the second transformer, the power input terminal of the fourth rectifier unit is connected to the second secondary winding of the first transformer, and the power input terminal of the fifth rectifier unit is connected to the third secondary winding of the second transformer. The power input terminal of the second control unit is connected to the power output terminal of the low-voltage power supply module, and the control output terminal of the second control unit is connected to the control input terminal of the second switch unit. The second control unit is used to control the on / off state of the second switch unit.

2. The power conversion module based on low-voltage input according to claim 1, characterized in that, The second switching unit includes: Second MOSFET; The second MOSFET is an N-type transistor, and its drain is connected to the second terminal of the primary winding of the second transformer. The source of the second MOSFET is grounded, and its gate is connected to the control input terminal of the second switching unit and the control output terminal of the second control unit.

3. The power conversion module based on low-voltage input according to claim 2, characterized in that, The second control unit includes: The second control chip, the twenty-fifth resistor, the twenty-sixth resistor, and the thirtieth capacitor; The power input pin of the second control chip serves as the power input terminal of the second control unit and is connected to the power output terminal of the low-voltage power supply module. The first end of the 25th resistor is connected to the drive output pin of the second control chip, and the second end of the 25th resistor serves as the control output terminal of the second control unit and is connected to the gate of the second MOS transistor. The first end of the 26th resistor is connected to the reference voltage pin of the second control chip, and the second end of the 26th resistor is connected to the oscillator timing resistor-capacitor pin of the second control chip. The first terminal of the thirtieth capacitor is connected to the second terminal of the twenty-sixth resistor, and the second terminal of the thirtieth capacitor is grounded.

4. The power conversion module based on low-voltage input according to claim 3, characterized in that, The second control unit also includes: Ninth diode, tenth diode, twenty-seventh resistor, thirty-first capacitor, thirty-second capacitor, and thirty-third capacitor; Wherein, the ninth diode is a Zener diode, and the cathode of the ninth diode is connected to the power output terminal of the low-voltage power supply module; the tenth diode is a Zener diode, and the cathode of the tenth diode is connected to the anode of the ninth diode; the first terminal of the twenty-seventh resistor is connected to the anode of the ninth diode; the first terminal of the thirty-first capacitor is connected to the second terminal of the twenty-seventh resistor, and the second terminal of the thirty-first capacitor is grounded; the first terminal of the thirty-second capacitor is connected to the first terminal of the thirty-first capacitor and the power input pin of the second control chip, respectively, and the second terminal of the thirty-second capacitor is grounded. The first terminal of the thirty-third capacitor is connected to the reference voltage pin of the second control chip, and the second terminal of the thirty-third capacitor is grounded.

5. The power conversion module based on low-voltage input according to claim 3, characterized in that, The second control unit also includes: The 34th capacitor, the 28th resistor, and the 11th diode; Specifically, the first terminal of the thirty-fourth capacitor is connected to the power output terminal of the low-voltage power supply module, the first terminal of the twenty-eighth resistor is connected to the first terminal of the thirty-fourth capacitor, the second terminal of the twenty-eighth resistor is connected to the second terminal of the thirty-fourth capacitor, the cathode of the eleventh diode is connected to the second terminal of the twenty-eighth resistor, and the anode of the eleventh diode is connected to the drain of the second MOS transistor.

6. The power conversion module based on low-voltage input according to claim 3, characterized in that, The second control unit also includes: The 29th resistor, the 30th resistor, the 31st resistor, and the 35th capacitor; In this configuration, the 29th resistor is connected in series between the source and ground of the second MOSFET, with its first terminal connected to the source of the second MOSFET and its second terminal grounded. The first terminal of the 30th resistor is connected to the first terminal of the 29th resistor, and its second terminal is connected to the second terminal of the 29th resistor. The first terminal of the 31st resistor is connected to the source of the second MOSFET, and its second terminal is connected to the current detection pin of the second control chip. The first terminal of the 35th capacitor is connected to the second terminal of the 31st resistor, and its second terminal is grounded.

7. The power conversion module based on low-voltage input according to claim 3, characterized in that, The second control unit also includes: The thirty-second resistor, the thirty-sixth capacitor, the transistor, the thirty-third resistor, the thirty-fourth resistor, the optocoupler, the twelfth diode, the thirteenth diode, and the thirty-fifth resistor; Wherein, the first end of the thirty-second resistor is connected to the reference voltage pin of the second control chip, and the second end of the thirty-second resistor is connected to the feedback pin of the second control chip; the first end of the thirty-sixth capacitor is connected to the second end of the thirty-second resistor, and the second end of the thirty-sixth capacitor is grounded; the transistor is NPN type, the collector of the transistor is connected to the second end of the thirty-second resistor, and the emitter of the transistor is connected to the second end of the thirty-sixth capacitor; The first end of the thirty-third resistor is connected to the first end of the power output terminal of the third rectifier unit, and the first end of the thirty-fourth resistor is connected to the first end of the thirty-third resistor. The anode of the input side of the optocoupler is connected to the second end of the thirty-fourth resistor, and the cathode of the input side of the optocoupler is connected to the second end of the thirty-third resistor. The anode of the twelfth diode is connected to the second end of the power output terminal of the third rectifier unit, the anode of the thirteenth diode is connected to the cathode of the twelfth diode, and the cathode of the thirteenth diode is connected to the cathode of the input side of the optocoupler. The output collector of the optocoupler is connected to the compensation pin of the second control chip, the output emitter of the optocoupler is connected to the base of the transistor, the first end of the thirty-fifth resistor is connected to the base of the transistor, and the second end of the thirty-fifth resistor is grounded.

8. The power conversion module based on low-voltage input according to claim 1, characterized in that, The third rectification unit, the fourth rectification unit, and the fifth rectification unit each include: The fourteenth diode, the thirty-seventh capacitor, the second voltage regulator chip, the thirty-eighth capacitor, the thirty-ninth capacitor, the fortieth capacitor, the forty-first capacitor, and the fifteenth diode; In the third rectifier unit, the anode of the fourteenth diode is connected to the first end of the first secondary winding of the second transformer; in the fourth rectifier unit, the anode of the fourteenth diode is connected to the first end of the second secondary winding of the second transformer; and in the fifth rectifier unit, the anode of the fourteenth diode is connected to the first end of the third secondary winding of the second transformer. The first terminal of the thirty-seventh capacitor is connected to the cathode of the fourteenth diode, and the second terminal of the thirty-seventh capacitor in the third rectifier unit is connected to the second terminal of the first secondary winding of the second transformer and grounded; the second terminal of the thirty-seventh capacitor in the fourth rectifier unit is connected to the second terminal of the second secondary winding of the second transformer and grounded; the second terminal of the thirty-seventh capacitor in the fifth rectifier unit is connected to the second terminal of the third secondary winding of the second transformer and grounded. The input terminal of the second voltage regulator chip is connected to the first terminal of the thirty-seventh capacitor, and the ground terminal of the second voltage regulator chip is grounded. The output terminal of the second voltage regulator chip serves as the first power output terminal of the rectifier unit to output the fourth voltage. The first terminal of the thirty-eighth capacitor is connected to the output terminal of the second voltage regulator chip, and the second terminal of the thirty-eighth capacitor is connected to the ground terminal of the second voltage regulator chip. The first terminal of the thirty-ninth capacitor is connected to the ground terminal of the second voltage regulator chip, and the second terminal of the thirty-ninth capacitor is connected to the second terminal of the thirty-seventh capacitor. The first terminal of the fortieth capacitor is connected to the first terminal of the thirty-eighth capacitor, and the second terminal of the fortieth capacitor is connected to the second terminal of the thirty-eighth capacitor. The first terminal of the forty-first capacitor is connected to the first terminal of the thirty-ninth capacitor, and the second terminal of the forty-first capacitor is connected to the second terminal of the thirty-ninth capacitor. The fifteenth diode is a Zener diode, and the anode of the fifteenth diode is connected to the second terminal of the forty-first capacitor, the cathode of the fifteenth diode is connected to the first terminal of the forty-first capacitor, and the anode of the fifteenth diode serves as the second power output terminal of the rectifier unit to output the third voltage.

9. The power conversion module based on low-voltage input according to claim 1, characterized in that, The conversion module also includes: The third control chip, the thirty-sixth resistor, the fifth inductor, the forty-second capacitor, the sixteenth diode, and the forty-third capacitor; The power input pin of the third control chip is connected to the power output terminal of the low-voltage power supply module, and the first end of the thirty-sixth resistor is connected to the power input pin of the third control chip. The second end of the thirty-sixth resistor is connected to the soft-start capacitor pin, the peak current limiting pin, and the duty cycle control pin of the third control chip, respectively. The first terminal of the fifth inductor is connected to the feedback pin of the third control chip, and the second terminal of the fifth inductor is grounded. The first terminal of the forty-second capacitor is connected to the timing capacitor pin of the third control chip, and the second terminal of the forty-second capacitor is connected to the ground pin of the third control chip. The sixteenth diode is a Zener diode, and the cathode of the sixteenth diode is connected to the first terminal of the fifth inductor. The first terminal of the forty-third capacitor is connected to the anode of the sixteenth diode and the second terminal of the forty-second capacitor, respectively. The second terminal of the forty-third capacitor is connected to the second terminal of the fifth inductor. The first terminal of the forty-third capacitor outputs a third voltage.

10. The power conversion module based on low-voltage input according to claim 9, characterized in that, The conversion module also includes: The thirty-seventh and thirty-eighth resistors; Specifically, the first end of the thirty-seventh resistor is connected to the current detection input pin of the third control chip, and the second end of the thirty-seventh resistor is connected to the second end of the fifth inductor. The first end of the thirty-eighth resistor is connected to the first end of the thirty-seventh resistor, and the second end of the thirty-eighth resistor is connected to the ground pin of the third control chip.

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