A kind of no-load low-power consumption circuit for sweeper power panel

Abstract

The utility model discloses a kind of no-load low-power consumption circuits for sweeper power panel, including input module, EMI module, discharge chip U4, adjusting module and output module;Input module, EMI module and adjusting module, rectifier filter output module are sequentially electrically connected, discharge chip and EMI module are shunt connected, input module is used to input alternating voltage, EMI module is used to suppress differential mode interference, discharge chip is used to discharge residual voltage when input module cuts off input, adjusting module is used to adjust alternating voltage size, output module is used to output voltage;After receiving alternating voltage through input module, differential mode interference is filtered out by EMI module, discharge chip U4 keeps high resistance state, low power consumption at this time;Adjusting module adjusts voltage in real time by PWM control or transformer winding switching, cooperate the rectifier filter circuit of output module to provide stable direct current, when input module is powered off, U4 activates its 800V voltage-withstanding switch immediately, and closed loop is formed with EMI module, and safety capacitor energy is quickly discharged.

Description

Technical Field

[0001] This utility model belongs to the field of electronic circuit technology of power board for sweeping machines, specifically a low-power circuit for sweeping machine power board under no-load conditions. Background Technology

[0002] The power board of a robotic vacuum cleaner consists of a power module and multiple AC control output circuits. To suppress differential-mode interference, a safety capacitor is typically connected in parallel at the AC input. After charging, the safety capacitor stores energy. To prevent electric shock when touching the power plug, a resistor is usually connected in parallel across the capacitor to quickly release the energy. However, increasing the discharge resistor introduces additional power consumption. The power consumption of the safety capacitor is mainly related to the discharge resistance. To meet the requirement of rapid energy release, the discharge resistance needs to decrease as the capacitance of the safety capacitor increases, which leads to an increase in no-load power consumption. Especially in standby mode, the discharge resistance of the safety capacitor and the energy consumption of components in the multiple AC output control circuits can make it difficult to meet the certification requirements, namely, the no-load power consumption must be controlled below 0.1W when the AC input is 230V. Utility Model Content

[0003] The purpose of this invention is to provide a low-power circuit for the power board of a sweeping robot under no-load conditions, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A low-power circuit for a sweeping robot power board under no-load conditions includes an input module, an EMI module, a discharge chip U4, an adjustment module, and an output module. The input module, the EMI module, the adjustment module, and the rectifier-filter output module are electrically connected in sequence. The discharge chip is connected in parallel with the EMI module. The input module is used to input AC voltage, the EMI module is used to suppress differential-mode interference, the discharge chip is used to discharge residual voltage when the input module cuts off the input, the adjustment module is used to adjust the magnitude of the AC voltage, and the output module is used to output voltage.

[0006] In a further technical solution, the input module includes an AC-L connection terminal, an AC-N connection terminal, and fuses F1 and F2. Fuse F1 and F2 are connected in parallel, and one end of each is electrically connected to the AC-L connection terminal.

[0007] In a further technical solution, the EMI module includes resistors RX1, RX2, RX3, and RX4, and capacitor CX1. Resistor RX1 is connected in parallel with resistor RX2, and one end of RX1 is electrically connected to capacitor CX1, while the other end is connected to pins 1, 2, 3, and 4 of the discharge chip U4. Resistor RX3 is connected in parallel with resistor RX4, and one end of RX3 is electrically connected to capacitor CX1, while the other end is connected to pins 5, 6, 7, and 8 of the discharge chip U4.

[0008] In a further technical solution, the EMI module also includes resistors RX5, RX6, RX7, and RX8, and capacitor CX2. Resistor RX5 is connected in parallel with resistor RX7, and one end of RX5 is electrically connected to capacitor CX2, while the other end is electrically connected to the parallel resistors RX8 and RX6. The other ends of resistors RX8 and RX6 are electrically connected to the other end of capacitor CX2.

[0009] In a further technical solution, the adjustment module includes an SCR, pin 1 of which is connected to the node of capacitor CX2, resistor RX7, and resistor RX5, pin 2 of which is electrically connected to the TEK-L connection terminal, and pin 3 of which is electrically connected to the output module.

[0010] A further technical solution includes the output module comprising resistors R2, R3, R4, R5, and R6, and an optocoupler PC6. One end of resistor R2 is electrically connected to pin 3 of the SCR, and the other end of resistor R2 is electrically connected to pin 4 of the optocoupler PC6. Pin 6 of the optocoupler PC6 is electrically connected to one end of resistor R3, and the other end of resistor R3 is electrically connected to pin 2 of the SCR. Pin 2 of the optocoupler PC6 is connected to resistor R4 and the signal port, respectively. Pin 1 of the SCR is connected to the other end of resistor R4. Resistor R5 is connected in parallel with resistor R6, with one end connected to the power output terminal and the other end electrically connected to the other end of resistor R4 and pin 1 of the optocoupler PC6.

[0011] The beneficial effects of this utility model are:

[0012] This invention receives AC voltage through the input module, and differential mode interference is filtered out by the EMI module. At this time, the discharge chip U4 maintains a high impedance state and low power consumption. The adjustment module adjusts the voltage in real time through PWM control or transformer winding switching, and provides stable DC power in conjunction with the rectifier and filter circuit of the output module. When the input module is powered off, U4 immediately activates its 800V withstand voltage switch, forming a closed loop with the EMI module to quickly discharge the energy of the safety capacitor. The dynamic voltage adjustment of the adjustment module reduces the loss of traditional linear voltage regulation, and the synchronous rectification design of the output module further reduces standby power consumption. The multi-module collaboration achieves ultra-low no-load power consumption, which reduces no-load energy consumption compared with traditional solutions, while meeting safety standards and energy efficiency certification requirements.

[0013] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0014] Figure 1 : Circuit diagram of this utility model.

[0015] Reference numerals: 1. EMI module; 2. Discharge chip U4; 3. Adjustment module; 4. Output module Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] Please refer to Figure 1 ;

[0018] This embodiment discloses a low-power circuit for a sweeping robot power board under no-load conditions, including an input module, an EMI module 1, a discharge chip U4, an adjustment module 3, and an output module 4. The input module, EMI module 1, adjustment module 3, and rectifier-filter output module 4 are electrically connected in sequence. The discharge chip is connected in parallel with the EMI module 1. The input module is used to input AC voltage, the EMI module 1 is used to suppress differential mode interference, the discharge chip is used to discharge residual voltage when the input module cuts off the input, the adjustment module 3 is used to adjust the magnitude of the AC voltage, and the output module 4 is used to output voltage.

[0019] Specifically, in this embodiment, after receiving AC voltage through the input module, differential mode interference is filtered out by the EMI module 1. At this time, the discharge chip U4 maintains a high impedance state and low power consumption. The adjustment module 3 adjusts the voltage in real time through PWM control or transformer winding switching, and provides stable DC power in conjunction with the rectifier and filter circuit of the output module 4. When the input module is powered off, U4 immediately activates its 800V withstand voltage switch, forming a closed loop with the EMI module 1 to quickly discharge the energy of the safety capacitor. The dynamic voltage adjustment of the adjustment module 3 reduces the loss of traditional linear voltage regulation, and the synchronous rectification design of the output module 4 further reduces standby power consumption. The multi-module collaboration achieves ultra-low no-load power consumption, reducing no-load energy consumption compared to traditional solutions, while meeting safety standards and energy efficiency certification requirements.

[0020] In this embodiment, the input module further includes an AC-L connection terminal, an AC-N connection terminal, and fuses F1 and F2. Fuse F1 and F2 are connected in parallel, and one end of each is electrically connected to the AC-L connection terminal. The EMI module 1 includes resistors RX1, RX2, RX3, and RX4, and capacitor CX1. Resistor RX1 and RX2 are connected in parallel, and one end of RX1 is electrically connected to capacitor CX1, while the other end is connected to pins 1, 2, 3, and 4 of the discharge chip U4. RX3 is connected in parallel with resistor RX4, and one end of RX3 is electrically connected to capacitor CX1, while the other end is connected to pins 5, 6, 7, and 8 of discharge chip U4. Furthermore, EMI module 1 also includes resistors RX5, RX6, RX7, RX8, and capacitor CX2. Resistor RX5 is connected in parallel with resistor RX7, and one end of RX5 is electrically connected to capacitor CX2, while the other end is electrically connected to the parallel resistors RX8 and RX6. The other ends of resistors RX8 and RX6 are electrically connected to the other end of capacitor CX2.

[0021] Specifically, the AC-L and AC-N terminals ensure safe access to the high-voltage AC power supply. Fuse F1 and F2 are connected in parallel at the input, with one end connected to AC-L. This disconnects the power supply in case of overload, protecting downstream circuits from damage. Resistors RX1 and RX2 are connected in parallel and then to capacitor CX1, forming a low-pass filter. The other end is connected to pins 1, 2, 3, and 4 of the discharge chip U4 to process the input signal and reduce high-frequency noise. Resistors RX3 and RX4 are connected in parallel and then to CX1, also connected to pins of U4, forming a second filter channel to enhance signal stability. Resistors RX5 and RX7 are connected in parallel and then to capacitor CX2 to form another layer of filtering circuitry, further suppressing electromagnetic interference. EMI module 1 effectively filters out high-frequency noise, improving the circuit's anti-interference capability. Through the design of multiple parallel filters, the circuit can achieve better noise suppression in different frequency ranges, ensuring signal integrity and stability.

[0022] In this embodiment, the adjustment module 3 includes an SCR. Pin 1 of the SCR is connected to the node of capacitor CX2, resistor RX7, and resistor RX5. Pin 2 of the SCR is electrically connected to the TEK-L connection terminal. Pin 3 of the SCR is electrically connected to the output module 4. Further, the output module 4 includes resistors R2, R3, R4, R5, and R6, and an optocoupler PC6. One end of resistor R2 is electrically connected to pin 3 of the SCR, and the other end of resistor R2 is electrically connected to pin 4 of the optocoupler PC6. Pin 6 of the optocoupler PC6 is electrically connected to one end of resistor R3, and the other end of resistor R3 is electrically connected to pin 2 of the SCR. Pin 2 of the optocoupler PC6 is connected to resistor R4 and the signal port, respectively. Pin 1 of the SCR is connected to the other end of resistor R4. Resistor R5 and resistor R6 are connected in parallel, with one end connected to the power output terminal and the other end connected to the other end of resistor R4 and pin 1 of the optocoupler PC6.

[0023] Specifically, pin 1 of the SCR is connected to the node of capacitor CX2, resistor RX7, and resistor RX5 to control the conduction of the SCR. Pin 2 of the SCR is connected to the TEK-L terminal to receive the neutral signal from the AC power supply. Pin 3 of the SCR is connected to output module 4, responsible for outputting the regulated signal to subsequent circuits. One end of resistor R2 is connected to pin 3 of the SCR, and the other end is connected to pin 4 of optocoupler PC6, forming the first step of signal transmission. Pin 6 of optocoupler PC6 is connected to one end of resistor R3, and the other end of R3 is connected to pin 2 of the SCR, completing the signal feedback loop. Pin 2 of optocoupler PC6 is connected to resistor R4 and the signal port, responsible for transmitting the signal to the downstream circuit. Resistor R5 is connected in parallel with resistor R6 and connected to the power output terminal. The other end is connected to the other end of resistor R4 and pin 1 of optocoupler PC6, forming a combination of power and signal. Through the SCR settings, precise control of the current can be achieved. The conduction state of the SCR can be adjusted according to changes in the input signal, thereby achieving dynamic control of the output signal. This adaptability allows the system to adapt to different operating conditions and load requirements. The use of the optocoupler PC6 provides electrical isolation between the input and output, effectively preventing the impact of high voltage on downstream circuits, improving the safety and reliability of the system. The isolation design protects sensitive components from interference from high voltage or noise, maintains good signal integrity, reduces signal attenuation and distortion during transmission, ensures the stability of the output signal, and improves the overall performance of the system.

[0024] 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.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-power no-load circuit for a sweeping robot power board, characterized in that, It includes an input module, an EMI module (1), a discharge chip U4 (2), an adjustment module (3), and an output module (4); the input module, the EMI module (1), the adjustment module (3), and the output module (4) are electrically connected in sequence, the discharge chip is connected in parallel with the EMI module (1), the input module is used to input AC voltage, the EMI module (1) is used to suppress differential mode interference, the discharge chip is used to discharge residual voltage when the input module cuts off the input, the adjustment module (3) is used to adjust the magnitude of AC voltage, and the output module (4) is used to output voltage.

2. The no-load low-power circuit for a sweeper power board according to claim 1, characterized in that, The input module includes an AC-L connection terminal, an AC-N connection terminal, and fuses F1 and F2. Fuse F1 and F2 are connected in parallel, and one end of each is electrically connected to the AC-L connection terminal.

3. The no-load low-power circuit for a sweeping robot power board according to claim 2, characterized in that, The EMI module (1) includes resistors RX1, RX2, RX3, and RX4 and capacitor CX1. Resistor RX1 is connected in parallel with resistor RX2, and one end of RX1 is electrically connected to capacitor CX1, while the other end is connected to pins 1, 2, 3, and 4 of the discharge chip U4 (2). Resistor RX3 is connected in parallel with resistor RX4, and one end of RX3 is electrically connected to capacitor CX1, while the other end is connected to pins 5, 6, 7, and 8 of the discharge chip U4 (2).

4. The no-load low-power circuit for a sweeping robot power board according to claim 3, characterized in that, The EMI module (1) further includes resistors RX5, RX6, RX7, RX8 and capacitor CX2. Resistor RX5 is connected in parallel with resistor RX7, and one end of RX5 is electrically connected to capacitor CX2, while the other end is electrically connected to resistors RX8 and RX6 connected in parallel. The other ends of resistors RX8 and RX6 are electrically connected to the other end of capacitor CX2.

5. The no-load low-power circuit for a sweeper power board according to claim 4, characterized in that, The adjustment module (3) includes an SCR. Pin 1 of the SCR is connected to the node of the capacitor CX2, the resistor RX7, and the resistor RX5. Pin 2 of the SCR is electrically connected to the TEK-L connection terminal. Pin 3 of the SCR is electrically connected to the output module (4).

6. The low-power unload circuit for a sweeping robot power board according to claim 5, characterized in that, The output module (4) includes resistors R2, R3, R4, R5, and R6, and an optocoupler PC6. One end of resistor R2 is electrically connected to pin 3 of the SCR, and the other end of resistor R2 is electrically connected to pin 4 of the optocoupler PC6. Pin 6 of the optocoupler PC6 is electrically connected to one end of resistor R3, and the other end of resistor R3 is electrically connected to pin 2 of the SCR. Pin 2 of the optocoupler PC6 is connected to resistor R4 and the signal port, respectively. Pin 1 of the SCR is connected to the other end of resistor R4. Resistor R5 is connected in parallel with resistor R6, and one end of resistor R5 is connected to the power output terminal, while the other end is electrically connected to the other end of resistor R4 and pin 1 of the optocoupler PC6.

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