A power supply charger circuit for an underwater cleaning robot

Abstract

The utility model relates to power supply charger technical field, concretely is a kind of power supply charger circuit of underwater cleaning robot charging, the power supply charger circuit includes main control MCU and with the front-end circuit and feedback voltage stabilizing circuit of main control MCU electric connection, the front-end circuit includes AC input end, EMI rectifier filter circuit, power conversion circuit, rectifier filter output circuit, prevent backflow and prevent reverse connection output circuit and main control PWM circuit, wherein the input end of EMI rectifier filter circuit is connected with AC input end, output end is connected with power conversion circuit, the rectifier filter output circuit is connected with power conversion circuit, prevent backflow and prevent reverse connection output circuit and feedback voltage stabilizing circuit respectively, the PWM circuit is connected with power conversion circuit and feedback voltage stabilizing circuit respectively. The power supply charger circuit in the utility model is reasonable in design, and charging current output has good stability, can prevent power supply itself from generating high-frequency noise pollution power grid, and can also prevent current from flowing back into power supply.

Description

Technical Field

[0001] This utility model relates to the field of power charger technology, specifically a power charger circuit for charging an underwater cleaning robot. Background Technology

[0002] Underwater cleaning robots are automated devices used for underwater environmental cleaning operations, and have shown significant progress in both technological development and market application in recent years. Their core functions include underwater stain removal, sediment agitation and scraping, and water filtration, serving a wide range of fields such as marine engineering, ship maintenance, and pool cleaning. Underwater cleaning robots are typically charged using power chargers, which contain built-in power charger circuits. However, existing power charger circuits for underwater cleaning robots have flawed designs, resulting in poor charging current output stability, high-frequency noise pollution of the power grid, and reverse current flow into the power supply, causing damage to the charger. To address these issues, the inventors have improved the power charger circuit for underwater cleaning robots. Utility Model Content

[0003] The purpose of this utility model is to provide a power charger circuit for charging underwater cleaning robots. This power charger circuit is reasonably designed, has good stability of charging current output, and can prevent the power supply itself from generating high-frequency noise that pollutes the power grid. It also has the advantages of preventing current from flowing back into the power supply, thus solving the problems mentioned in the above technical background.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a power charger circuit for charging an underwater cleaning robot. The power charger circuit includes a main control MCU and a front-end circuit and a feedback voltage regulator circuit electrically connected to the main control MCU. The front-end circuit includes an AC input terminal, an EMI rectifier and filter circuit, a power conversion circuit, a rectifier and filter output circuit, an anti-backflow and anti-reverse connection output circuit, and a main control PWM circuit. The input terminal of the EMI rectifier and filter circuit is connected to the AC input terminal, and the output terminal is connected to the power conversion circuit. The rectifier and filter output circuit is connected to the power conversion circuit, the anti-backflow and anti-reverse connection output circuit, and the feedback voltage regulator circuit, respectively. The PWM circuit is connected to the power conversion circuit and the feedback voltage regulator circuit, respectively.

[0005] Preferably, the main control MCU is model CMS8S6990.

[0006] Preferably, the input voltage of the AC input terminal is 100-240V.

[0007] Preferably, the EMI rectifier and filter circuit includes a transformer NF1, a transformer NF2, a capacitor XC1, a capacitor C1, resistors R1, R2, R3, and R4, and a rectifier bridge BD1. Resistors R1 and R2 are connected in series, resistors R3 and R4 are connected in series, and resistor R3 is connected in parallel across resistor R1. Resistors R4 are connected in parallel across resistor R2. One end of transformer NF1 is connected to the AC input terminal, and the other end is connected to capacitor XC1, transformer NF2, resistors R1, R2, R3, and R4 respectively. The input terminal of rectifier bridge BD1 is connected to transformer NF2, and the output terminal is connected to capacitor C1.

[0008] Preferably, the power conversion circuit includes resistors R5, R6, R11, R12, R13, and R14, a diode D1, a capacitor C8, and a transformer T1. Resistors R5 and R6 are connected in series, with one end connected to the EMI rectifier and filter circuit and the other end connected to the PWM circuit. Capacitor C8, resistors R13 and R14 are connected in parallel, with one end connected to the transformer T1 and the EMI rectifier and filter circuit, and the other end connected to resistors R11 and R12. Diode D1 has one end connected to resistors R11 and R12, and the other end connected to the transformer T1 and the PWM circuit. The secondary winding of transformer T1 is connected to the rectifier and filter output circuit.

[0009] Preferably, the rectifier filter output circuit includes a diode D6, a capacitor C5, and a capacitor C6. The capacitors C5 and C6 are connected in parallel, with one end of each capacitor grounded and the other end connected to the diode D6 and the reverse connection protection output circuit, respectively. The end of the diode D6 furthest from the capacitors C5 and C6 is connected to the power conversion circuit.

[0010] Preferably, the reverse current protection output circuit comprises resistors R56, R57, R58, R59, R60, R63, R64, and R65, capacitor C21, MOSFETs Q71, Q72, and Q8, wherein resistor R65 is positioned between MOSFETs Q71 and Q72; one end of resistor R64 is connected to MOSFET Q8, and the other end is connected to resistor R65, MOSFET Q71, and MOSFET Q72 respectively. One end of resistor R60 is connected to the main control MCU, and the other end is connected to resistor R63 and MOSFET Q8 respectively; one end of resistor R69 is connected to the main control MCU, and the other end is connected to capacitor C21, resistor R58, resistor R63, MOSFET Q8 and rectifier filter output circuit respectively; the end of resistor R58 away from resistor R69 is connected to resistor R56 and resistor R57 respectively; the end of capacitor C21 away from resistor R69 is connected to resistor R57 and main control MCU respectively.

[0011] Preferably, the main control PWM circuit includes resistors R9, R15, and R18, a switching transistor Q1, a capacitor C10, a PWM chip U1, and a switching transistor U2-B. Pins 4 and 6 of the PWM chip U1 are connected to resistors R18 and R15, respectively; pin 2 is connected to capacitor C10 and switching transistor U2-B, respectively; pin 1 is grounded; and pin 5 is connected to the power conversion circuit. The ends of capacitor C10 and switching transistor U2-B furthest from the PWM chip U1 are both grounded. The ends of resistors R18 and R15 furthest from the PWM chip U1 are connected to the switching transistor Q1. One end of resistor R9 is grounded, and the other end is connected to switching transistor Q1 and resistor R18, respectively.

[0012] Preferably, the feedback voltage regulator circuit includes resistors R35, R36, R37, R45, R46, R47, R48, R50, R51, and R52; capacitors C20, C28, C30, and C31; an optocoupler U2-A; a diode D14; and a silicon controlled rectifier (SCR) U3. Resistor R36 and capacitor C31 are connected in parallel, with one end of each connected to ground, and the other ends connected to the main control MCU, resistor R35, and resistor R37, respectively. The end of resistor R37 furthest from resistor R36 and capacitor C31 is also connected to the circuit. The capacitor C30 is connected to the resistor R37, with the end of the capacitor C30 away from the resistor R37 connected to the resistor R52. The end of the resistor R52 away from the capacitor C30 is connected to the capacitor C20, the resistor R50, the resistor R51, and the thyristor U3. One end of the resistor R48 is connected to the capacitor C20, and the other end is connected to the thyristor U3, the diode D14, and the resistor R47. The capacitor C28, the resistor R46, and the optocoupler U2-A are connected in parallel, with one end of the capacitor C28, the resistor R46, and the optocoupler U2-A connected to the diode D14 and the main control MCU, and the other end of each connected to the resistor R45.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a power charger circuit for charging an underwater cleaning robot. The power charger circuit includes a main control MCU, a front-end circuit electrically connected to the main control MCU, and a feedback voltage regulator circuit. The front-end circuit includes an AC input terminal, an EMI rectifier and filter circuit, a power conversion circuit, a rectifier and filter output circuit, an anti-backflow and anti-reverse connection output circuit, and a main control PWM circuit. The AC input terminal, the EMI rectifier and filter circuit, the power conversion circuit, the rectifier and filter output circuit, the anti-backflow and anti-reverse connection output circuit, and the main control MCU control output constitute a positive power flow output. The main control MCU control output, the feedback voltage regulator circuit, the main control PWM circuit, and the power conversion circuit constitute a reverse control flow, ensuring the stability of the current. At the same time, the EMI rectifier and filter circuit can filter out high-frequency interference from the power grid and prevent high-frequency noise generated by the power supply itself from polluting the power grid. The anti-backflow and anti-reverse connection output circuit is a protective circuit to prevent current from flowing into the power supply and causing damage. Attached Figure Description

[0014] Figure 1 This is a block diagram illustrating the principle of this utility model; Figure 2 This is a circuit diagram of the main control MCU and its peripheral circuits of this utility model; Figure 3 This is a circuit diagram of the front-end circuit of this utility model; Figure 4 This is a circuit diagram of the feedback voltage regulator circuit of this utility model.

[0015] The reference numerals and names in the figure are as follows: 1. Main control MCU; 2. Front-end circuit; 21. AC input terminal; 22. EMI rectifier and filter circuit; 23. Power conversion circuit; 24. Rectifier and filter output circuit; 25. Anti-backflow and anti-reverse connection output circuit; 26. Main control PWM circuit; 3. Feedback voltage regulator circuit. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1 This utility model provides an embodiment of a power charger circuit for charging an underwater cleaning robot. The power charger circuit includes a main control MCU1, a front-end circuit 2 and a feedback voltage regulator circuit 3 electrically connected to the main control MCU1. The front-end circuit 2 includes an AC input terminal 21, an EMI rectifier and filter circuit 22, a power conversion circuit 23, a rectifier and filter output circuit 24, an anti-backflow and anti-reverse connection output circuit 25, and a main control PWM circuit 26. The input terminal of the EMI rectifier and filter circuit 22 is connected to the AC input terminal 21, and the output terminal is connected to the power conversion circuit 23. The rectifier and filter output circuit 24 is connected to the power conversion circuit 23, the anti-backflow and anti-reverse connection output circuit 25, and the feedback voltage regulator circuit 3, respectively. The PWM circuit 26 is connected to the power conversion circuit 23 and the feedback voltage regulator circuit 3, respectively.

[0018] Please see Figure 2 The U4 in the diagram is the main control MCU1, and its model number is CMS8S6990.

[0019] Please see Figure 3 The input voltage of AC input terminal 21 in the figure is 100-240V, and a fuse F1 is connected to AC input terminal 21.

[0020] Specifically, the EMI rectifier and filter circuit 22 includes a transformer NF1, a transformer NF2, a capacitor XC1, a capacitor C1, resistors R1, R2, R3, and R4, and a rectifier bridge BD1. Resistors R1 and R2 are connected in series, and resistors R3 and R4 are connected in series. Resistor R3 is connected in parallel across resistor R1, and resistor R4 is connected in parallel across resistor R2. One end of transformer NF1 is connected to the AC input terminal 21, and the other end is connected to capacitor XC1, transformer NF2, resistors R1, R2, R3, and R4 respectively. The input terminal of rectifier bridge BD1 is connected to transformer NF2, and the output terminal is connected to capacitor C1.

[0021] Specifically, the power conversion circuit 23 includes resistors R5, R6, R11, R12, R13, and R14, a diode D1, a capacitor C8, and a transformer T1. Resistors R5 and R6 are connected in series, with one end connected to the EMI rectifier and filter circuit 22 and the other end connected to the PWM circuit 26. Capacitor C8, resistors R13 and R14 are connected in parallel, with one end connected to the transformer T1 and the EMI rectifier and filter circuit 22, and the other end connected to resistors R11 and R12. One end of diode D1 is connected to resistors R11 and R12, and the other end is connected to the transformer T1 and the PWM circuit 26. The secondary winding of transformer T1 is connected to the rectifier and filter output circuit 24.

[0022] Specifically, the rectifier filter output circuit 24 includes a diode D6, a capacitor C5, and a capacitor C6. The capacitors C5 and C6 are connected in parallel, with one end of each capacitor grounded and the other end connected to the diode D6 and the reverse connection protection output circuit 25, respectively. The end of the diode D6 furthest from the capacitors C5 and C6 is connected to the power conversion circuit 23.

[0023] Specifically, the reverse connection protection output circuit 25 consists of resistors R56, R57, R58, R59, R60, R63, R64, R65, capacitor C21, MOSFETs Q71, Q72, and Q8. Resistor R65 is positioned between MOSFETs Q71 and Q72. One end of resistor R64 is connected to MOSFET Q8, and the other end is connected to resistor R65, MOSFET Q71, and MOSFET Q72. One end of resistor R60 is connected to the main control MCU1, and the other end is connected to resistor R63 and MOSFET Q8 respectively; one end of resistor R69 is connected to the main control MCU1, and the other end is connected to capacitor C21, resistor R58, resistor R63, MOSFET Q8 and rectifier filter output circuit 24 respectively; the end of resistor R58 away from resistor R69 is connected to resistor R56 and resistor R57 respectively; the end of capacitor C21 away from resistor R69 is connected to resistor R57 and main control MCU1 respectively.

[0024] Specifically, the main control PWM circuit 26 includes resistors R9, R15, and R18, a switching transistor Q1, a capacitor C10, a PWM chip U1, and a switching transistor U2-B. Pins 4 and 6 of the PWM chip U1 are connected to resistors R18 and R15, respectively; pin 2 is connected to capacitor C10 and switching transistor U2-B, respectively; pin 1 is grounded; and pin 5 is connected to the power conversion circuit 23. The ends of capacitor C10 and switching transistor U2-B furthest from the PWM chip U1 are both grounded. The ends of resistors R18 and R15 furthest from the PWM chip U1 are connected to the switching transistor Q1. One end of resistor R9 is grounded, and the other end is connected to switching transistor Q1 and resistor R18, respectively. In this embodiment, the PWM chip U1 is a TL494.

[0025] Please see Figure 4The feedback voltage regulator circuit 3 in the figure includes resistors R35, R36, R37, R45, R46, R47, R48, R50, R51, and R52; capacitors C20, C28, C30, and C31; an optocoupler U2-A; a diode D14; and a thyristor U3. Resistor R36 and capacitor C31 are connected in parallel, with one end of each connected to ground. The other ends are connected to the main control MCU1, resistor R35, and resistor R37, respectively. The end of resistor R37 furthest from resistor R36 and capacitor C31 is connected to... Capacitor C30 is connected, with the end of capacitor C30 furthest from resistor R37 connected to resistor R52; the end of resistor R52 furthest from capacitor C30 is connected to capacitor C20, resistor R50, resistor R51, and SCR U3; one end of resistor R48 is connected to capacitor C20, and the other end is connected to SCR U3, diode D14, and resistor R47; capacitor C28, resistor R46, and optocoupler U2-A are connected in parallel, with one end of capacitor C28, resistor R46, and optocoupler U2-A connected to diode D14 and main control MCU1, and the other ends of all connected to resistor R45.

[0026] Please refer to it again. Figures 1 to 4 The power charger circuit for underwater cleaning robots described above has good stability in charging current output. It can also prevent the power supply itself from generating high-frequency noise that pollutes the power grid and prevent current from flowing back into the power supply. It is worth promoting and applying.

[0027] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A power charger circuit for charging an underwater cleaning robot, characterized in that: The system includes a main control MCU (1) and a front-end circuit (2) and a feedback voltage regulator circuit (3) electrically connected to the main control MCU (1). The front-end circuit (2) includes an AC input terminal (21), an EMI rectifier and filter circuit (22), a power conversion circuit (23), a rectifier and filter output circuit (24), an anti-backflow and anti-reverse connection output circuit (25), and a main control PWM circuit (26). The input terminal of the EMI rectifier and filter circuit (22) is connected to the AC input terminal (21), and the output terminal is connected to the power conversion circuit (23). The rectifier and filter output circuit (24) is connected to the power conversion circuit (23), the anti-backflow and anti-reverse connection output circuit (25), and the feedback voltage regulator circuit (3), respectively. The PWM circuit (26) is connected to the power conversion circuit (23) and the feedback voltage regulator circuit (3), respectively.

2. The power charger circuit for charging an underwater cleaning robot according to claim 1, characterized in that: The model of the main control MCU (1) is CMS8S6990.

3. The power charger circuit for charging an underwater cleaning robot according to claim 1, characterized in that: The input voltage of the AC input terminal (21) is 100-240V.

4. The power charger circuit for charging an underwater cleaning robot according to claim 1, characterized in that: The EMI rectifier and filter circuit (22) includes transformer NF1, transformer NF2, capacitor XC1, capacitor C1, resistor R1, resistor R2, resistor R3, resistor R4 and rectifier bridge BD1. Resistors R1 and R2 are connected in series, resistors R3 and R4 are connected in series, and resistor R3 is connected in parallel across resistor R1 and resistor R4 is connected in parallel across resistor R2. One end of transformer NF1 is connected to the AC input terminal (21), and the other end is connected to capacitor XC1, transformer NF2, resistor R1, resistor R2, resistor R3 and resistor R4 respectively. The input terminal of rectifier bridge BD1 is connected to transformer NF2, and the output terminal is connected to capacitor C1.

5. The power charger circuit for charging an underwater cleaning robot according to claim 1, characterized in that: The power conversion circuit (23) includes resistors R5, R6, R11, R12, R13, and R14, diode D1, capacitor C8, and transformer T1. Resistors R5 and R6 are connected in series, with one end of resistors R5 and R6 connected to the EMI rectifier filter circuit (22) and the other end connected to the PWM circuit (26). Capacitor C8, resistors R13 and R14 are connected in parallel, with one end of capacitor C8, resistors R13 and R14 connected to transformer T1 and the EMI rectifier filter circuit (22) respectively, and the other end connected to resistors R11 and R12. One end of diode D1 is connected to resistors R11 and R12, and the other end is connected to transformer T1 and the PWM circuit (26) respectively. The secondary winding of transformer T1 is connected to the rectifier filter output circuit (24).

6. The power charger circuit for charging an underwater cleaning robot according to claim 1, characterized in that: The rectifier filter output circuit (24) includes a diode D6, a capacitor C5 and a capacitor C6. The capacitors C5 and C6 are connected in parallel, and one end of the capacitors C5 and C6 is grounded. The other end is connected to the diode D6 and the reverse connection protection output circuit (25) respectively. The end of the diode D6 away from the capacitors C5 and C6 is connected to the power conversion circuit (23).

7. The power charger circuit for charging an underwater cleaning robot according to claim 1, characterized in that: The reverse current protection output circuit (25) consists of resistors R56, R57, R58, R59, R60, R63, R64, R65, capacitor C21, MOSFETs Q71, Q72, and Q8. Resistor R65 is positioned between MOSFETs Q71 and Q72. One end of resistor R64 is connected to MOSFET Q8, and the other end is connected to resistors R65, Q71, and Q72 respectively. One end of resistor R60 is connected to the main control MCU (1), and the other end is connected to resistor R63 and MOSFET Q8 respectively; one end of resistor R69 is connected to the main control MCU (1), and the other end is connected to capacitor C21, resistor R58, resistor R63, MOSFET Q8 and rectifier filter output circuit (24) respectively; the end of resistor R58 away from resistor R69 is connected to resistor R56 and resistor R57 respectively; the end of capacitor C21 away from resistor R69 is connected to resistor R57 and main control MCU (1) respectively.

8. The power charger circuit for charging an underwater cleaning robot according to claim 1, characterized in that: The main control PWM circuit (26) includes resistors R9, R15, and R18, a switching transistor Q1, a capacitor C10, a PWM chip U1, and a switching transistor U2-B. Pins 4 and 6 of the PWM chip U1 are connected to resistors R18 and R15, respectively. Pin 2 is connected to capacitor C10 and switching transistor U2-B, respectively. Pin 1 is grounded, and pin 5 is connected to the power conversion circuit (23). The ends of capacitor C10 and switching transistor U2-B furthest from PWM chip U1 are both grounded. The ends of resistors R18 and R15 furthest from PWM chip U1 are connected to switching transistor Q1. One end of resistor R9 is grounded, and the other end is connected to switching transistor Q1 and resistor R18, respectively.

9. The power charger circuit for charging an underwater cleaning robot according to claim 1, characterized in that: The feedback voltage regulator circuit (3) includes resistors R35, R36, R37, R45, R46, R47, R48, R50, R51, and R52, capacitors C20, C28, C30, and C31, an optocoupler U2-A, a diode D14, and a thyristor U3. Resistor R36 and capacitor C31 are connected in parallel, with one end of resistor R36 and capacitor C31 connected to ground, and the other end connected to the main control MCU (1), resistor R35, and resistor R37, respectively. The end of resistor R37 furthest from resistor R36 and capacitor C31 is connected to the main control MCU (1). The capacitor C30 is connected to the resistor R52 at the end of the capacitor C30 away from the resistor R37; the resistor R52 at the end of the resistor R52 away from the capacitor C30 is connected to the capacitor C20, the resistor R50, the resistor R51 and the thyristor U3 respectively; one end of the resistor R48 is connected to the capacitor C20, and the other end is connected to the thyristor U3, the diode D14 and the resistor R47 respectively; the capacitor C28, the resistor R46 and the optocoupler U2-A are connected in parallel, and one end of the capacitor C28, the resistor R46 and the optocoupler U2-A is connected to the diode D14 and the main control MCU (1), and the other end is connected to the resistor R45.

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