A switch-off isolation power-saving delay protection circuit

Abstract

This utility model provides a power-on / off isolation power-saving delay protection circuit, including a power input module, a power-on / off button module, and a main control module, as well as a power conversion module. The power conversion module has an enable port. The power-on / off button module includes a power-on / off signal trigger circuit, a power enable control circuit, a first signal isolation circuit, a second signal isolation circuit, and an RC delay circuit. The power-on / off signal trigger circuit is connected to the power input module and the power enable control circuit. The first signal isolation circuit is connected between the power-on / off signal trigger circuit and the signal input terminal of the main control module. The signal output terminal of the main control module is connected to the second signal isolation circuit. The output terminal of the main control module is also connected to the RC delay circuit. The other end of the second signal isolation circuit is connected to the power enable control circuit. The power enable control circuit is also connected to the enable port of the power conversion module. The output terminal of the power conversion module is connected to the main control module.

Description

Technical Field

[0001] This utility model relates to the field of switching circuit technology, and in particular to a power-saving delay protection circuit for power-on / off isolation. Background Technology

[0002] The increasing prevalence and intelligence of intelligent robot systems (such as service robots, industrial robots, and home service robots) rely heavily on efficient and reliable power management systems for their core functions. However, traditional power-on / off circuits and protection mechanisms have significant shortcomings in the following aspects, directly affecting system energy efficiency, safety, and reliability. Existing power-on / off circuits typically use fixed conduction paths or mechanical relay control, resulting in the following problems: 1. Incomplete power-off: Some circuits cannot completely disconnect the power supply, leading to leakage or continuous power consumption in low-power modes, affecting battery life. 2. Instantaneous current surge during switching: Sudden load changes during power-on can easily generate instantaneous high currents, potentially damaging the power module or shortening the lifespan of electronic components. 3. Large batteries may simultaneously power motors, main control modules, or other large power-consuming devices; large ripple in motor circuits can interfere with the system's main control circuit. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to provide a power-saving delay protection circuit for power-on / off isolation.

[0004] This utility model is implemented using the following method: a power-on / off isolation power-saving delay protection circuit, including a power input module, a power-on / off button module, and a main control module, and further including a power conversion module. The power conversion module is provided with an enable port. The power-on / off button module includes a power-on / off signal triggering circuit, a power enable control circuit, a first signal isolation circuit, a second signal isolation circuit, and an RC delay circuit. The power-on / off signal triggering circuit is connected to the power input module. The power-on / off signal triggering circuit is connected to the power enable control circuit. The first signal isolation circuit is connected between the power-on / off signal triggering circuit and the signal input terminal of the main control module. The signal output terminal of the main control module is connected to the second signal isolation circuit. The output terminal of the main control module is also connected to the RC delay circuit. The other end of the second signal isolation circuit is connected to the power enable control circuit. The power enable control circuit is also connected to the enable port of the power conversion module. The output terminal of the power conversion module is connected to the main control module.

[0005] Preferably, the first signal isolation circuit includes an optocoupler U1. The signal input side of the optocoupler U1 is connected to a power-on / off signal triggering circuit. The power-on / off signal triggering circuit includes a button K1. The first pin of the button K1 and the optocoupler U1 is connected to the output pin of the power input module, and the second pin of the optocoupler U1 is grounded. The fourth pin of the signal output side of the optocoupler U1 is connected to the signal input terminal of the main control module, and the third pin of the signal output side of the optocoupler U1 is grounded, for transmitting the button trigger signal to the main control module.

[0006] Preferably, the power-on / off signal trigger circuit further includes a voltage sampling circuit, which includes a sampling resistor, a MOSFET Q2, and a sampling resistor R197. One end of the button K1 is connected to the first pin of the MOSFET Q2 and the resistor R197, and the second pin of the MOSFET Q2 is connected in series with a resistor R198 to the output terminal of the power input module.

[0007] Preferably, the resistor R197 is connected between the first and second pins of the MOSFET Q2, and a Zener diode ZD2 is also connected between the first and second pins of the MOSFET Q2; a resistor R199 is also connected in series between the resistor R198 and the second pin of the MOSFET Q2; the fourth pin of the optocoupler U1 is grounded via capacitor C182 and connected to connector J2; the first pin of the optocoupler U1 is connected to resistor R9; the third and fourth pins of the button K1 are grounded, the first and second pins of the button K1 are connected to capacitor C4, and the other end of capacitor C4 is grounded; the fourth pin of the optocoupler U1 is also connected to the output power supply of the main control module via pull-up resistor R3.

[0008] Preferably, the RC delay circuit includes a capacitor C186 and a resistor R253, and the capacitor C186 and resistor R253 are connected in parallel to the signal output terminal of the main control module; the second signal isolation circuit includes a MOSFET Q24 and an optocoupler U2, the first pin of the MOSFET Q24 is connected to the signal output terminal of the main control module, the third pin of the MOSFET Q24 is connected to the second pin of the optocoupler U2, and the second pin of the MOSFET Q24 is grounded; the resistor R253 and the capacitor C186 are grounded away from the signal output terminal of the main control module; the fourth pin of the optocoupler U2 is connected to the power input module, and the third pin of the optocoupler U2 is connected to the power enable control circuit.

[0009] Preferably, a resistor R11 is connected between the fourth pin of the optocoupler U2 and the output terminal of the power input module; a resistor R230 and a diode D8 are also connected between the output terminal of the main control module and the RC delay circuit; and a resistor R13 is also connected between the third pin of the MOSFET Q24 and the second pin of the optocoupler U2.

[0010] Preferably, the power enable control circuit includes MOSFET Q1 and MOSFET Q3. The first pin of MOSFET Q3 is connected to the output terminal of the second signal isolation circuit and the output terminal of the power on / off signal trigger circuit. The third pin of MOSFET Q3 is connected to the first pin of MOSFET Q1. The second pin of MOSFET Q1 is connected to the power conversion module. The third pin of MOSFET Q1 is connected to an enable signal output terminal, which is connected to the enable port of the power conversion module.

[0011] Preferably, a diode D1 is connected between the output terminal of the power-on / off signal trigger circuit and the first pin of the MOSFET Q3; the second pin of the MOSFET Q3 is grounded, and a resistor R12 and a Zener diode ZD6 are connected in parallel between the second pin and the first pin of the MOSFET Q3; a resistor R10 and a Zener diode ZD1 are connected in parallel between the second pin and the first pin of the MOSFET Q1; a capacitor C2 and a resistor R200 are connected in parallel between the third pin of the MOSFET Q1 and ground; a resistor R207 and a resistor R6 are connected in parallel between the power conversion module and the second pin of the MOSFET Q1, and one end of the capacitor C1 is connected to the second pin of the MOSFET Q1, while the other end of the capacitor C1 is grounded.

[0012] Preferably, the power conversion module includes an EMI filter circuit, a voltage extraction circuit, and a DC-DC isolation device. The input terminal of the EMI filter circuit is connected to the output terminal of the power input module. The input terminal of the voltage extraction circuit is connected to the output terminal of the EMI filter circuit. The output terminal of the voltage extraction circuit is connected to the enable control circuit. The DC-DC isolation device has an enable port. The output terminal of the EMI filter circuit is connected to the input terminal of the DC-DC isolation device. The output terminal of the DC-DC isolation device is connected to the main control module.

[0013] Preferably, the EMI filter circuit includes an inductor L4, capacitors CE12, C172, C173, and C174. The first pin of inductor L4 is connected to the output terminal of the power input module, and the second pin of inductor L4 is grounded. Capacitors CE12, C172, C173, and C174 are connected in parallel between the first and second pins of inductor L4. The voltage extraction circuit includes an inductor L5, capacitors C177, C178, and CE2. One end of inductor L5 is connected to the fourth pin of inductor L4, and the other end of inductor L5 is connected to capacitors C177, C178, and CE2. One end of capacitor CE2 is connected to the power enable control circuit. The other end of capacitors C177, C178, and CE2 is connected to the third pin of inductor L4 and grounded. Capacitors C175 and C176 are also connected in parallel between the third and fourth pins of inductor L4. The DC-DC isolation device includes MD1. The first pin of MD1 is connected to the fourth pin of inductor L4, the third pin of MD1 is connected to the third pin of inductor L4, and the eighth pin of MD1 is connected to the power input terminal of the main control module. The second pin of MD1 is an enable port used to receive the enable signal output by the power enable control circuit.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a power-saving delay protection circuit for power-on / off isolation. Compared with the prior art, this utility model has at least the following technical effects: 1. By setting a first signal isolation circuit between the power-on / off signal trigger circuit and the main control module, and setting a second signal isolation circuit between the power enable conversion module and the main control module, the signal isolation between the weak current of the main control module and the strong current of the power input module is realized, avoiding mutual interference between strong and weak currents; and by connecting an RC delay circuit at the signal output terminal of the main control module, the power-on / off can be delayed, avoiding damage to the power input module or shortening the life of other electronic components due to sudden load changes during power-on, and avoiding the phenomenon that the system data is not fully retained due to excessively fast power-off; through the design of the power enable module, when the main control module receives the power-off trigger signal from the power-off signal trigger circuit, the main control module will send a power-off signal to the power enable control circuit, and the power enable control circuit will send a power-off signal to the enable terminal of the power conversion module, so the power conversion module will not output power externally, and cutting off the external power supply can achieve complete power cut-off during power-off. 2. The first signal isolation circuit achieves electrical isolation between the power-on / off signal trigger circuit and the main control module through optocoupler U1, effectively preventing interference from high-voltage components to low-voltage signals, ensuring the stability and reliability of button trigger signal transmission, and avoiding signal distortion and false triggering. 3. The voltage sampling circuit collects the output voltage of the power input module in real time through MOSFET Q2 and sampling resistor, providing accurate voltage information to the main control module. By controlling the switching action of MOSFET Q2, it achieves an open circuit when Q2 is not activated in the power-off state, ensuring no current flows through the voltage sampling circuit and achieving zero power consumption in the power-off state. 4. The RC delay circuit, through the charging and discharging characteristics of capacitor C186 and resistor R253, generates a delay during power-on / off signal transmission, avoiding the impact of instantaneous current surges on the power module and electronic components, thus providing protection. The second signal isolation circuit, through MOSFET Q24 and optocoupler U2, achieves electrical isolation between the main control module and the power enable control circuit, further improving the system's anti-interference capability and safety. 5. The power enable control circuit achieves precise control of the power conversion module's enable port through the switching of MOSFETs Q1 and Q3, ensuring that the power conversion module is turned on when needed and turned off when not needed, thereby effectively controlling the power supply and achieving power saving. At the same time, it can completely cut off the power supply when the device is off, solving the problem of incomplete shutdown.6. The EMI filter circuit can effectively suppress electromagnetic interference signals in the power input, ensure the purity of the power supply, and avoid interference affecting the main control module and other circuits; the voltage extraction circuit provides the working voltage for the enable control circuit, ensuring the normal operation of the enable control circuit; the DC-DC isolation device realizes the isolation conversion of the power supply, converts the input voltage into a voltage suitable for the operation of the main control module, and at the same time realizes the electrical isolation between the input and output, improving the anti-interference capability and safety of the system. Attached Figure Description

[0015] Figure 1 This is a control principle block diagram of a power-saving delay protection circuit for power-on / off isolation.

[0016] Figure 2 This is a circuit diagram of the power on / off button module of this utility model.

[0017] Figure 3 This is a circuit block diagram of the power conversion module of this utility model.

[0018] Figure 4 This is a circuit block diagram of the power input module of this utility model.

[0019] The following are the reference numerals: 1. Power input module; 2. Main control module; 3. Power on / off signal trigger circuit; 4. Power enable control circuit; 5. First signal isolation circuit; 6. Second signal isolation circuit; 7. RC delay circuit; 8. EMI filter circuit; 9. Voltage extraction circuit; 10. DC-DC isolation device. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Please see Figures 1 to 4A power-on / off isolation power-saving delay protection circuit includes a power input module 1, a power on / off button module, and a main control module 2, and also includes a power conversion module. The power conversion module has an enable port. The power on / off button module includes a power on / off signal trigger circuit 2, a power enable control circuit 3, a first signal isolation circuit 4, a second signal isolation circuit 5, and an RC delay circuit 6. The power on / off signal trigger circuit 2 is connected to the power input module 1, and the power on / off signal trigger circuit 2 is connected to the power enable control circuit 3. The first signal isolation circuit 4 is connected between the power on / off signal trigger circuit 2 and the signal input terminal of the main control module 2. The signal output terminal of the main control module 2 is connected to the second signal isolation circuit 5. The output terminal of the main control module 2 is also connected to the RC delay circuit 6. The other end of the second signal isolation circuit 5 is connected to the power enable control circuit 3. The power enable control circuit 3 is also connected to the enable port of the power conversion module. The output terminal of the power conversion module is connected to the main control module 2. By placing a first signal isolation circuit 4 between the power-on / off signal trigger circuit 2 and the main control module 2, and setting a second signal isolation circuit 5 between the power enable conversion module and the main control module 2, signal isolation between the low-voltage part of the main control module 2 and the high-voltage part of the power input module 1 is achieved, avoiding mutual interference between high-voltage and low-voltage components. By connecting an RC delay circuit 6 to the signal output terminal of the main control module 2, power-on / off can be delayed, avoiding damage to the power input module 1 or shortening the life of other electronic components due to sudden load changes during power-on, and avoiding the phenomenon of system data not being fully retained due to excessively fast power-off. Through the design of the power enable module, when the main control module 2 receives the power-off trigger signal from the power-on / off signal trigger circuit 2, the main control module 2 will send a power-off signal to the power enable control circuit 3. The power enable control circuit 3 will send a power-off signal to the enable terminal of the power conversion module, and the power conversion module will not output power externally. Cutting off the external power supply can completely cut off the power supply during power-off.

[0022] Please see Figures 1 to 4 Preferably, the first signal isolation circuit 4 includes an optocoupler U1. The signal input side of the optocoupler U1 is connected to the power-on / off signal triggering circuit 2. The power-on / off signal triggering circuit 2 includes a button K1. The first pin of the button K1 and the optocoupler U1 is connected to the output terminal of the power input module 1, and the second pin of the optocoupler U1 is grounded. The fourth pin of the signal output side of the optocoupler U1 is connected to the signal input terminal of the main control module 2, and the third pin of the signal output side of the optocoupler U1 is grounded, for transmitting the button trigger signal to the main control module 2. The first signal isolation circuit 4 achieves electrical isolation between the power-on / off signal triggering circuit 2 and the main control module 2 through the optocoupler U1, effectively preventing interference from the high-voltage part to the low-voltage signal, ensuring the stability and reliability of the button trigger signal transmission, and avoiding signal distortion and false triggering.

[0023] Please see Figures 1 to 4 Preferably, the power-on / off signal trigger circuit 2 further includes a voltage sampling circuit. The voltage sampling circuit includes a sampling resistor, a MOSFET Q2, and a sampling resistor R197. One end of the button K1 is connected to the first pin of the MOSFET Q2 and the resistor R197. The second pin of the MOSFET Q2 is connected in series with a resistor R198 and is connected to the output terminal of the power input module 1. The voltage sampling circuit collects the output voltage of the power input module 1 in real time through the MOSFET Q2 and the sampling resistor, providing accurate voltage information to the main control module 2. By switching the MOSFET Q2 on and off, when the MOSFET Q2 is not activated in the power-off state, an open circuit is achieved, ensuring that no current flows through the voltage sampling circuit and thus achieving zero power consumption in the power-off state. Specifically, when button K1 is pressed and held to trigger the signal, the voltage of power input module 1 turns on MOSFET Q2 via related circuits, enabling subsequent circuits to conduct. This enables power enable control circuit 3 to operate, activating the power conversion module to supply power to the system (main control module 2 and screen, etc.). Specifically, after button K1 is pressed, pin 1 of Q2 changes from high to low, then pins 2 and 3 of Q2 conduct. Through D1, pin 1 of Q3 changes from low to high, activating Q3 and Q1. After Q1 conducts, a voltage momentarily reaches EN, causing the power module below to turn on. When the device is powered off, main control module 2 outputs a power-off signal, which is transmitted to power enable control circuit 3 via RC delay circuit and second signal isolation circuit 5. At this time, the states of MOSFETs Q1 and Q3 in power enable control circuit 3 change, turning off the enable port of the power conversion module and cutting off the power. Because the resistance between the source and drain of MOSFET Q2 is extremely high in the off state, it is approximately an open circuit, preventing current from flowing through the circuit, thus achieving near-zero current and no power consumption when powered off.

[0024] Please see Figures 1 to 4Preferably, the resistor R197 is connected between the first and second pins of the MOSFET Q2, and a Zener diode ZD2 is also connected between the first and second pins of the MOSFET Q2; a resistor R199 is also connected in series between the resistor R198 and the second pin of the MOSFET Q2; the fourth pin of the optocoupler U1 is grounded via capacitor C182 and connected to connector J2; the first pin of the optocoupler U1 is connected to resistor R9; the third and fourth pins of the button K1 are grounded, the first and second pins of the button K1 are connected to capacitor C4, and the other end of capacitor C4 is grounded; the fourth pin of the optocoupler U1 is also connected to the output power supply of the main control module 2 via pull-up resistor R3. Zener diode ZD2 provides voltage regulation and protection for the voltage across MOSFET Q2, preventing overvoltage damage to the MOSFET; the inclusion of components such as capacitor C182 and pull-up resistor R3 ensures the stability and reliability of the output signal from optocoupler U1; the connection of connector J2 enables control of other circuits or devices, expanding the circuit's functionality; capacitor C4 eliminates bounce during button K1 operation, improving the accuracy of button triggering.

[0025] Please see Figures 1 to 4 Preferably, the RC delay circuit 6 includes a capacitor C186 and a resistor R253, and the capacitor C186 and resistor R253 are connected in parallel to the signal output terminal of the main control module 2; the second signal isolation circuit 5 includes a MOSFET Q24 and an optocoupler U2, the first pin of the MOSFET Q24 is connected to the signal output terminal of the main control module 2, the third pin of the MOSFET Q24 is connected to the second pin of the optocoupler U2, and the second pin of the MOSFET Q24 is grounded; the resistor R253 and the capacitor C186 are grounded away from the signal output terminal of the main control module 2; the fourth pin of the optocoupler U2 is connected to the power input module 1, and the third pin of the optocoupler U2 is connected to the power enable control circuit 3. The RC delay circuit uses the charging and discharging characteristics of capacitor C186 and resistor R253 to generate a delay during the power-on / off signal transmission, avoiding the impact of instantaneous current surges on the power module and electronic components, thus playing a protective role. The second signal isolation circuit 5 uses MOSFET Q24 and optocoupler U2 to achieve electrical isolation between the main control module 2 and the power enable control circuit 3, further improving the system's anti-interference capability and safety.

[0026] Please see Figures 1 to 4Preferably, a resistor R11 is connected between the fourth pin of the optocoupler U2 and the output terminal of the power input module 1; a resistor R230 and a diode D8 are also connected between the output terminal of the main control module 2 and the RC delay circuit 6; a resistor R13 is also connected between the third pin of the MOSFET Q24 and the second pin of the optocoupler U2. Resistor R11 limits the current, protecting the optocoupler U2 from damage caused by excessive current; the resistor R230 and diode D8 limit the current and provide unidirectional conduction control for the signal output from the main control module 2, ensuring stable signal transmission and circuit safety; resistor R13 adjusts the operating current of the MOSFET Q24, ensuring the normal operation of the optocoupler U2.

[0027] Please see Figures 1 to 4 Preferably, the power enable control circuit 3 includes MOSFETs Q1 and Q3. The first pin of MOSFET Q3 is connected to the output of the second signal isolation circuit 5 and the output of the power-on / off signal trigger circuit 2. The third pin of MOSFET Q3 is connected to the first pin of MOSFET Q1. The second pin of MOSFET Q1 is connected to the power conversion module. The third pin of MOSFET Q1 is connected to an enable signal output terminal, which is connected to the enable port of the power conversion module. The power enable control circuit 3, through the switching control of MOSFETs Q1 and Q3, achieves precise control of the enable port of the power conversion module, ensuring that the power conversion module is turned on when needed and turned off when not needed, thereby effectively controlling the power supply and achieving power saving. Simultaneously, it can completely cut off the power supply in the off state, solving the problem of incomplete shutdown.

[0028] Please see Figures 1 to 4Preferably, a diode D1 is connected between the output terminal of the power-on / off signal trigger circuit 2 and the first pin of the MOSFET Q3; the second pin of the MOSFET Q3 is grounded, and a resistor R12 and a Zener diode ZD6 are connected in parallel between the second pin and the first pin of the MOSFET Q3; a resistor R10 and a Zener diode ZD1 are connected in parallel between the second pin and the first pin of the MOSFET Q1; a capacitor C2 and a resistor R200 are connected in parallel between the third pin of the MOSFET Q1 and ground; a resistor R207 and a resistor R6 are connected in parallel between the power conversion module and the second pin of the MOSFET Q1, and one end of the capacitor C1 is connected to the second pin of the MOSFET Q1, while the other end of the capacitor C1 is grounded. Diode D1 prevents the signal from flowing back into the output of circuit 2, thus providing protection. Zener diodes ZD6 and ZD1 provide voltage regulation and protection (potential clamping protection) for MOSFETs Q3 and Q1, respectively, preventing overvoltage damage. Resistors R12, R10, R200, R207, and R6 act as voltage dividers, current limiters, and biasers, ensuring the normal operation of the MOSFETs. Capacitors C2 and C1 filter and stabilize the voltage, improving circuit stability.

[0029] Please see Figures 1 to 4 Preferably, the power conversion module includes an EMI filter circuit 7, a voltage extraction circuit 8, and a DC-DC isolation device 9. The input terminal of the EMI filter circuit 7 is connected to the output terminal of the power input module 1. The input terminal of the voltage extraction circuit 8 is connected to the output terminal of the EMI filter circuit 7, and the output terminal of the voltage extraction circuit 8 is connected to the enable control circuit. The DC-DC isolation device 9 has an enable port, and the output terminal of the EMI filter circuit 7 is connected to the input terminal of the DC-DC isolation device 9. The output terminal of the DC-DC isolation device 9 is connected to the main control module 2. The EMI filter circuit can effectively suppress electromagnetic interference signals in the power input, ensure the purity of the power supply, and avoid interference affecting the main control module 2 and other circuits. The voltage extraction circuit 8 provides the operating voltage for the enable control circuit, ensuring the normal operation of the enable control circuit. The DC-DC isolation device realizes the isolation conversion of the power supply, converting the input voltage into a voltage suitable for the operation of the main control module 2, and at the same time realizing electrical isolation between the input and output, improving the anti-interference capability and safety of the system.

[0030] Please see Figures 1 to 4Preferably, the EMI filter circuit 7 includes an inductor L4, capacitors CE12, C172, C173, and C174. The first pin of the inductor L4 is connected to the output terminal of the power input module 1, and the second pin of the inductor L4 is grounded. Capacitors CE12, C172, C173, and C174 are connected in parallel between the first and second pins of the inductor L4. The voltage extraction circuit 8 includes an inductor L5, capacitors C177, C178, and CE2. One end of the inductor L5 is connected to the fourth pin of the inductor L4, and the other end of the inductor L5 is connected to the... One end of capacitors C177, C178, and CE2 is connected to the power enable control circuit 3. The other end of capacitors C177, C178, and CE2 is connected to the third pin of inductor L4 and grounded. Capacitors C175 and C176 are also connected in parallel between the third and fourth pins of inductor L4. The DC-DC isolation device 9 includes MD1. The first pin of MD1 is connected to the fourth pin of inductor L4, the third pin of MD1 is connected to the third pin of inductor L4, the eighth pin of MD1 is connected to the power input terminal of the main control module 2, and the second pin of MD1 is an enable port for receiving the enable signal EN. The EMI filter circuit, consisting of inductor L4 and capacitors CE12, C172, C173, C174, C175, and C176, forms a filter network that effectively filters out high-frequency interference signals from the power input, improving power quality. The voltage extraction circuit 8, through the filtering and energy storage functions of inductor L5 and capacitors C177, C178, and CE2, provides a stable operating voltage for the power enable control circuit 3. The DC-DC isolation device 9, using a UQB100-F4812H, achieves power isolation conversion and voltage regulation, providing a stable operating power supply for the main control module 2 while ensuring electrical isolation between input and output, thus improving system safety and reliability.

[0031] The working principle of this utility model is as follows: When this utility model is in operation, when the user presses and holds the power button K1 (the holding time can be set to 3 seconds), the power-on signal trigger circuit 2 outputs a power-on signal through the button K1 and related components, causing the first pin of the MOSFET Q2 to change from a high level to a low level. This signal is directly transmitted to the first pin of the MOSFET Q3 in the power enable control circuit 3 via the diode D1, thus activating the MOSFET Q3 to conduct.

[0032] After MOSFET Q3 turns on, the signal output from its third pin triggers MOSFET Q1 to turn on. At the instant of turn-on, the enable signal output terminal immediately outputs a voltage to the enable port of DC-DC isolation device 9, activating DC-DC isolation device 9. At this time, the voltage from power input module 1, after interference is filtered out by the EMI filter circuit, is input to DC-DC isolation device 9. DC-DC isolation device 9 is activated and immediately outputs 12V power (such as a back-end power supply), directly powering the main control module 2 (MCU).

[0033] After the main control module 2 is powered on, the power-on / off signal trigger circuit 2 will send the power-on status signal back to the main control module 2 (Power_OFF_detection port) through the first signal isolation circuit 4 (optocoupler U1). After the main control module 2 confirms the power-on status, its signal output terminal (EN_12V port) outputs a sustain signal (high-level signal). This signal is delayed by an RC delay circuit (capacitor C186 and resistor R253 to avoid instantaneous current surges) and then transmitted to the power enable control circuit 3 through the second signal isolation circuit 5 (MOSFET Q24 and optocoupler U2) to maintain the conduction state of MOSFETs Q1 and Q3 and ensure continuous power supply.

[0034] When the robot is powered on, if the user presses and holds button K1, the switch signal trigger circuit generates a signal that is transmitted to the main control module 2 via the first signal isolation circuit 4. This signal is then transmitted to other cooperating equipment modules via connector J2 to issue power-on / off commands. Upon receiving the power-off command, the main control module 2 will display a power-off confirmation button on the robot's screen, awaiting user confirmation. After user confirmation, the main control module 2 outputs a power-off signal (low-level signal). This signal is delayed by an RC delay circuit and then transmitted to the power enable control circuit 3 via the second signal isolation circuit 5. This causes MOSFETs Q1 and Q3 to turn off, disabling the power conversion module's enable and cutting off the power supply, thus achieving power-off. The RC delay circuit prevents incomplete data saving during rapid power-off.

[0035] Throughout the process, the first signal isolation circuit 4 and the second signal isolation circuit 5 achieve isolation between high-voltage and low-voltage circuits, preventing mutual interference; the EMI filter circuit suppresses electromagnetic interference signals; the power enable control circuit 3 directly turns on the power supply via button triggering and maintains power supply after confirmation by the main control module 2, effectively cutting off the power supply in the off state, achieving near-zero power consumption; the RC delay circuit effectively avoids the current surge during switching, protecting circuit components. Through the coordinated work of each part, this circuit achieves the isolation, power saving, and delay protection functions for robot power on / off, solving the problems existing in traditional circuits. In standby mode, the main control module 2 controls MOSFETs Q3 and Q1 to turn off, cutting off the power enable control circuit 3 to send an enable signal, causing the DC-DC isolation device 9 to stop outputting, retaining only the weak pull-up circuit of the button detection in the power on / off signal trigger circuit 2, resulting in near-zero standby power consumption.

[0036] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0037] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0038] Finally, the above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions that fall within the scope of the present utility model are protected by the present utility model.

[0039] It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this utility model should also be considered within the scope of protection of this utility model.

Claims

1. A power-on / off isolation power-saving delay protection circuit, comprising a power input module, a power-on / off button module, and a main control module, characterized in that: It also includes a power conversion module, which has an enable port. The power on / off button module includes a power on / off signal triggering circuit, a power enable control circuit, a first signal isolation circuit, a second signal isolation circuit, and an RC delay circuit. The power on / off signal triggering circuit is connected to the power input module and the power enable control circuit. The first signal isolation circuit is connected between the power on / off signal triggering circuit and the signal input terminal of the main control module. The signal output terminal of the main control module is connected to the second signal isolation circuit. The output terminal of the main control module is also connected to the RC delay circuit. The other end of the second signal isolation circuit is connected to the power enable control circuit. The power enable control circuit is also connected to the enable port of the power conversion module. The output terminal of the power conversion module is connected to the main control module.

2. The power-on / off isolation power-saving delay protection circuit according to claim 1, characterized in that: The first signal isolation circuit includes an optocoupler U1. The signal input side of the optocoupler U1 is connected to a power-on / off signal triggering circuit. The power-on / off signal triggering circuit includes a button K1. The first pin of the button K1 and the optocoupler U1 is connected to the output pin of the power input module, and the second pin of the optocoupler U1 is grounded. The fourth pin of the signal output side of the optocoupler U1 is connected to the signal input terminal of the main control module, and the third pin of the signal output side of the optocoupler U1 is grounded, for transmitting the button trigger signal to the main control module.

3. The power-saving delay protection circuit for power-on / off isolation according to claim 2, characterized in that: The power on / off signal triggering circuit also includes a voltage sampling circuit, which includes a sampling resistor, a MOSFET Q2, and a sampling resistor R197. One end of the button K1 is connected to the first pin of the MOSFET Q2 and the resistor R197. The second pin of the MOSFET Q2 is connected in series with a resistor R198 and is connected to the output terminal of the power input module.

4. The power-on / off isolation power-saving delay protection circuit according to claim 3, characterized in that: The resistor R197 is connected between the first and second pins of the MOSFET Q2, and a Zener diode ZD2 is also connected between the first and second pins of the MOSFET Q2; a resistor R199 is connected in series between the resistor R198 and the second pin of the MOSFET Q2; the fourth pin of the optocoupler U1 is grounded via capacitor C182 and connected to connector J2; the first pin of the optocoupler U1 is connected to resistor R9; the third and fourth pins of the button K1 are grounded, and the first and second pins of the button K1 are connected to capacitor C4, the other end of which is grounded; the fourth pin of the optocoupler U1 is also connected to the output power supply of the main control module via pull-up resistor R3.

5. The power-saving delay protection circuit for power-on / off isolation according to claim 1, characterized in that: The RC delay circuit includes a capacitor C186 and a resistor R253, and the capacitor C186 and resistor R253 are connected in parallel to the signal output terminal of the main control module. The second signal isolation circuit includes a MOSFET Q24 and an optocoupler U2. The first pin of the MOSFET Q24 is connected to the signal output terminal of the main control module, the third pin of the MOSFET Q24 is connected to the second pin of the optocoupler U2, and the second pin of the MOSFET Q24 is grounded. The resistor R253 and the capacitor C186 are grounded away from the signal output terminal of the main control module. The fourth pin of the optocoupler U2 is connected to the power input module, and the third pin of the optocoupler U2 is connected to the power enable control circuit.

6. The power-on / off isolation power-saving delay protection circuit according to claim 5, characterized in that: A resistor R11 is connected between the fourth pin of the optocoupler U2 and the output terminal of the power input module; a resistor R230 and a diode D8 are also connected between the output terminal of the main control module and the RC delay circuit; a resistor R13 is also connected between the third pin of the MOS transistor Q24 and the second pin of the optocoupler U2.

7. The power-on / off isolation power-saving delay protection circuit according to claim 1, characterized in that: The power enable control circuit includes MOSFETs Q1 and Q3. The first pin of MOSFET Q3 is connected to the output of the second signal isolation circuit and the output of the power on / off signal trigger circuit. The third pin of MOSFET Q3 is connected to the first pin of MOSFET Q1. The second pin of MOSFET Q1 is connected to the power conversion module. The third pin of MOSFET Q1 is connected to an enable signal output terminal, which is connected to the enable port of the power conversion module.

8. The power-saving delay protection circuit for power-on / off isolation according to claim 7, characterized in that: A diode D1 is connected between the output terminal of the power-on / off signal trigger circuit and the first pin of the MOSFET Q3; the second pin of the MOSFET Q3 is grounded, and a resistor R12 and a Zener diode ZD6 are connected in parallel between the second pin and the first pin of the MOSFET Q3; a resistor R10 and a Zener diode ZD1 are connected in parallel between the second pin and the first pin of the MOSFET Q1; a capacitor C2 and a resistor R200 are connected in parallel between the third pin of the MOSFET Q1 and ground; a resistor R207 and a resistor R6 are connected in parallel between the power conversion module and the second pin of the MOSFET Q1, and one end of the capacitor C1 is connected to the second pin of the MOSFET Q1, while the other end of the capacitor C1 is grounded.

9. The power-saving delay protection circuit for power-on / off isolation according to claim 1, characterized in that: The power conversion module includes an EMI filter circuit, a voltage extraction circuit, and a DC-DC isolation device. The input terminal of the EMI filter circuit is connected to the output terminal of the power input module. The input terminal of the voltage extraction circuit is connected to the output terminal of the EMI filter circuit. The output terminal of the voltage extraction circuit is connected to the enable control circuit. The DC-DC isolation device has an enable port. The output terminal of the EMI filter circuit is connected to the input terminal of the DC-DC isolation device. The output terminal of the DC-DC isolation device is connected to the main control module.

10. The power-on / off isolation power-saving delay protection circuit according to claim 9, characterized in that: The EMI filter circuit includes inductor L4, capacitors CE12, C172, C173, and C174. The first pin of inductor L4 is connected to the output terminal of the power input module, and the second pin of inductor L4 is grounded. Capacitors CE12, C172, C173, and C174 are connected in parallel between the first and second pins of inductor L4. The voltage extraction circuit includes inductor L5, capacitors C177, C178, and CE2. One end of inductor L5 is connected to the fourth pin of inductor L4, and the other end of inductor L5 is connected to capacitors C177, C178, and C174. One end of E2 is connected to the power enable control circuit. The other end of capacitors C177, C178, and CE2 is connected to the third pin of inductor L4 and grounded. Capacitors C175 and C176 are also connected in parallel between the third and fourth pins of inductor L4. The DC-DC isolation device includes MD1. The first pin of MD1 is connected to the fourth pin of inductor L4, the third pin of MD1 is connected to the third pin of inductor L4, and the eighth pin of MD1 is connected to the power input terminal of the main control module. The second pin of MD1 is an enable port used to receive the enable signal output by the power enable control circuit.

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