Power socket electric energy distribution control system and method

Abstract

The invention discloses a power socket electric energy distribution control system and method, and relates to the technical field of power distribution and supply, and the system comprises a micro-control module which controls a main jack and a plurality of branch jacks of a jack control module to carry out the multi-path power distribution of the electric energy of the commercial power connected to a power module, and a current detection module detects the overcurrent. The branch sockets are controlled to be powered off in sequence until overcurrent disappears, the power distribution control module conducts voltage conversion processing on direct-current electric energy connected into the branch sockets and conducts power distribution, if the branch sockets are not powered, the power distribution control module can switch an electric energy transmission path and supply power to the branch sockets, and when direct current needs to be provided, voltage conversion processing is conducted; and when the branch socket is fully powered off and is over-current or short-circuited, power distribution is stopped. According to the power socket electric energy distribution control system and method, when the total power distribution power exceeds the safety limit, the set power supply state of the main jack is maintained, electric energy interaction is carried out in cooperation with the external equipment power supply, and the power distribution efficiency and the power distribution safety are improved.

Description

Technical Field

[0001] This invention relates to the field of power distribution and supply technology, specifically a power socket power distribution control system and method. Background Technology

[0002] With the development of science and technology, people have higher expectations for life. The widespread application of smart homes has brought great convenience to our work and life. Power sockets are basic switching appliances that can be seen everywhere in people's daily lives. In the current technology, power sockets distribute the mains power provided by the grid to multiple smart home devices by connecting multiple sockets in parallel. In order to improve the power supply safety of power sockets, relevant overcurrent detection devices are used to detect overcurrent and change the power distribution state when overcurrent occurs. However, when the total power of the connected smart home devices exceeds the maximum power of the power socket, it will be unable to maintain the power supply state of the main socket socket set by the user as required, and it will be unable to interact with the power supply of external devices, reducing the power distribution efficiency. Therefore, it needs to be improved. Summary of the Invention

[0003] This invention provides a power socket power distribution control system and method to solve the problems mentioned in the background art.

[0004] According to an embodiment of the present invention, a power socket power distribution control system is provided, comprising:

[0005] The power module is used to connect to the mains power supplied by the power grid;

[0006] The current detection module, connected to the power supply module and the socket control module, is used to sample and amplify the mains power input to the socket control module. It performs overcurrent detection on the processed signal according to the set overcurrent threshold and outputs the first detection signal when overcurrent occurs. It also performs current change rate detection on the signal output during current sampling and performs short circuit judgment in conjunction with the set change threshold. When a short circuit occurs, it outputs the second detection signal.

[0007] The socket control module, connected to the power module, is used to receive mains power and distribute it through multiple main sockets and branch sockets in parallel.

[0008] The microcontroller module, connected to the socket control module, current detection module, and power distribution control module, is used to control the socket control module to receive mains power. When the first detection signal is received, it controls multiple branch sockets in the socket control module to be de-energized sequentially until the first detection signal is stopped. When DC power is connected to a branch socket, it controls the power distribution control module to perform boost and inversion processing on the DC power. When a branch socket of the socket control module is de-energized or needs to provide DC power, it controls the power distribution control module to switch the power transmission path. During the provision of DC power, it controls the branch socket in the socket control module to be de-energized and controls the power distribution control module to step down the voltage. When all branch sockets are de-energized but still receiving the first detection signal or receiving the second detection signal, it controls the socket control module to stop receiving mains power.

[0009] The power distribution control module, connected to the socket control module, is used to boost and invert the DC power supplied to a branch socket and distribute the processed power to the unpowered branch socket by switching the power transmission path. When DC power is needed, the connected mains power is transformed, rectified and stepped down. When the branch socket is unpowered, the power transmission path is switched and the mains power is transmitted to the unpowered branch socket.

[0010] As a further embodiment of the present invention: the power distribution control module includes a power conversion unit and a transmission switching unit;

[0011] The power conversion unit is used to boost and invert the DC power input to one branch socket, and to transform, rectify and step down the mains power input.

[0012] The transmission switching unit is connected to the power conversion unit and is used to distribute the power processed by the power conversion unit to the unpowered branch sockets by switching the power transmission path. When the branch socket is unpowered, the power transmission path is switched and the mains power is transmitted to the unpowered branch socket.

[0013] As a further embodiment of the present invention: the power supply module includes an AC power interface and a sliding switch; the current detection module includes a first current transformer; the socket control module includes a first relay and a first socket; and the microcontroller module includes a first controller.

[0014] Preferably, the live wire and neutral wire of the mains power interface are connected to the first input terminal and the second input terminal of the slide switch, respectively; the first output power of the slide switch is connected to the first detection terminal of the first current transformer; the second detection terminal of the first current transformer is connected to the first moving terminal of the first relay; the second output terminal of the slide switch is connected to the second moving terminal of the first relay; the first stationary terminal and the second stationary terminal of the first relay are connected to the first terminal and the second terminal of the first socket, respectively; the ground wire of the mains power interface is connected to the third terminal of the first socket; and the control terminal of the first relay is connected to the IO1 terminal of the first controller.

[0015] As a further embodiment of the present invention: the socket control module further includes a second relay, a second socket, a third relay, a third socket, a fourth relay, and a fourth socket;

[0016] Preferably, the first stationary terminal of the second relay is connected to the first stationary terminal of the first relay, the first stationary terminal of the third relay, and the first stationary terminal of the fourth relay; the second stationary terminal of the second relay is connected to the second stationary terminal of the first relay, the second stationary terminal of the third relay, and the second stationary terminal of the fourth relay; the first moving terminal and the second moving terminal of the second relay are respectively connected to the first and second terminals of the second socket; the first moving terminal and the second moving terminal of the third relay are respectively connected to the first and second terminals of the third socket; the first moving terminal and the second moving terminal of the fourth relay are respectively connected to the first and second terminals of the fourth socket; the third terminals of the second socket, the third socket, and the fourth socket are all connected to the ground wire of the mains port; and the control terminals of the second relay, the third relay, and the fourth relay are respectively connected to the IO2, IO3, and IO4 terminals of the first controller.

[0017] As a further embodiment of the present invention: the current detection module further includes a fourth resistor, a first diode, a second diode, a first operational amplifier, a first resistor, a second resistor, a first capacitor, and a rate of change detection device;

[0018] Preferably, the anode of the first diode is connected to the first output terminal of the first current transformer, the cathode of the second diode, the non-inverting terminal of the first operational amplifier, one end of the second resistor, one end of the first resistor, and the input terminal of the change detection device, and is connected to the second output terminal of the first current transformer, the cathode of the first diode, the anode of the second diode, the non-inverting terminal of the first operational amplifier, and the ground terminal through a fourth resistor. The output terminal of the first operational amplifier is connected to the other end of the first resistor and the IO5 terminal of the first controller, and is connected to the other end of the second resistor through a first capacitor. The output terminal of the change detection device is connected to the IO11 terminal of the first controller.

[0019] As a further embodiment of the present invention: the current detection module further includes a third resistor, a first comparator, and a first reference power supply;

[0020] Preferably, the non-inverting input of the first comparator is connected to the output of the first operational amplifier via a third resistor, the inverting input of the first comparator is connected to the first reference power supply, and the output of the first comparator is connected to the IO6 terminal of the first controller.

[0021] As a further embodiment of the present invention, the microcontroller module also includes a self-locking device, a first logic unit, and a second logic unit;

[0022] Preferably, the input terminal of the self-locking device is connected to the output terminal of the first comparator, the output terminal of the self-locking device is connected to the IN1 terminal of the first logic device, the IN1 terminal of the second logic device, and the IO12 terminal of the first controller, and the IN2 terminal of the first logic device and the IN2 terminal of the second logic device are respectively connected to the IO2 terminal and the IO3 terminal of the first controller.

[0023] As a further embodiment of the present invention: the power conversion unit includes a first thyristor, a third diode, a fourth diode, a first inductor, a third capacitor, a first power transistor, a second power transistor, a first inverter, a second capacitor, a second inductor, and a first transformer;

[0024] Preferably, one end of the first thyristor is connected to the first end of the fourth socket, the other end of the first switching transistor is connected to the emitter of the first power transistor and the collector of the second power transistor through the first inductor, the collector of the first power transistor is connected to one end of the DC side of the first inverter, the emitter of the second power transistor is connected to the second end of the fourth socket and one end of the DC side of the first inverter, one end of the AC side of the first inverter is connected to the first end of the primary side of the first transformer through the second capacitor and the second inductor in sequence, the other end of the AC side of the first inverter bridge is connected to the second end of the primary side of the first transformer, the control terminal of the first thyristor is connected to the cathode of the third diode and the cathode of the fourth diode and grounded through the third capacitor, the anode of the third diode is connected to the IO8 terminal of the first controller and the gate of the second power transistor, and the anode of the fourth diode is connected to the gate of the first power transistor and the IO7 terminal of the first controller.

[0025] As a further embodiment of the present invention: the transmission switching unit includes a second thyristor, a third thyristor, a fourth thyristor, a fifth thyristor, a sixth thyristor, and a seventh thyristor;

[0026] Preferably, one end of the second thyristor is connected to one end of the fifth thyristor and one end of the seventh thyristor; one end of the third thyristor is connected to one end of the fourth thyristor and one end of the sixth thyristor; the other ends of the fourth thyristor and the fifth thyristor are respectively connected to the first and second ends of the second socket; the other ends of the sixth thyristor and the seventh thyristor are respectively connected to the first and second ends of the third socket; the other ends of the third thyristor and the second thyristor are respectively connected to the first and second stationary ends of the first relay; and the control terminals of the second and third thyristors are both connected to the IO10 terminal of the first controller.

[0027] Furthermore, to achieve the above objectives, this invention also proposes a power socket power distribution control method, which is applied to the aforementioned field-effect transistor aging test screening system. The steps of the method include:

[0028] Acquire the signal output by the current detection module when performing overcurrent detection or short circuit detection;

[0029] The control module receives mains power and distributes it through multiple circuits via the main socket and multiple branch sockets in parallel.

[0030] During an overcurrent event, multiple branch sockets in the control module are sequentially de-energized until the overcurrent disappears. When DC power is connected to a branch socket, the power distribution control module boosts and inverts the DC power. When a branch socket is de-energized or needs to provide DC power, the power distribution control module switches the power transmission path, de-energizes the branch socket providing DC power, and performs voltage reduction regulation. When all branch sockets are de-energized but overcurrent still occurs, the control module stops receiving AC mains power.

[0031] In the event of a short circuit, the control module of the control port stops receiving mains power.

[0032] Compared with the prior art, the beneficial effects of the present invention are: the power socket power distribution control system and method of the present invention can control the main socket and multiple branch sockets in the socket control module through the micro-control module to perform multi-channel power distribution processing on the mains power connected to the power module. When the current detection module detects an overcurrent, the micro-control module will sequentially de-energize the branch sockets until the overcurrent disappears. At this time, when a branch socket is connected to DC power, the power distribution control module will perform boost, inversion and transformation processing on the DC power and distribute power to the de-energized branch socket. If under normal conditions... When a branch socket in a power distribution system is without power, the power distribution control module can switch the power transmission path to maintain power supply to the branch socket. When a branch socket needs to provide DC power, the power distribution control module will perform transformation, rectification, and step-down processing. When a branch socket is completely de-energized and still experiences overcurrent or a short circuit is detected, the control module will stop working. It can maintain the power supply status of the main socket as set by the user when the total power distribution exceeds the power socket, and can perform power interaction control with external equipment power supplies to improve power distribution efficiency and safety. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a block diagram illustrating the principle of a power socket power distribution control system provided in an embodiment of the present invention.

[0035] Figure 2 This is a schematic block diagram of the power distribution control module provided in an embodiment of the present invention.

[0036] Figure 3 A circuit diagram of a power socket power distribution control system provided in an embodiment of the present invention.

[0037] Figure 4 The circuit diagram of the power conversion unit provided in the embodiment of the present invention.

[0038] Figure 5 The circuit diagram of the transmission switching unit provided in the embodiment of the present invention.

[0039] Figure 6 This is a schematic diagram of the structure of a power socket provided in an embodiment of the present invention.

[0040] Figure 7 A flowchart of a power socket power distribution control method provided in an embodiment of the present invention.

[0041] In the diagram, 10 is the first socket, 11 is the second socket, 12 is the third socket, 13 is the fourth socket, and 14 is the four extended branch sockets. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In one embodiment, see Figure 1 and Figure 2 A power socket power distribution control system, comprising:

[0044] Power module 1 is used to connect to the mains power supplied by the power grid;

[0045] The current detection module 2 is connected to the power supply module 1 and the socket control module 4. It is used to sample and amplify the mains power input to the socket control module 4, detect the overcurrent of the processed signal according to the set overcurrent threshold, and output the first detection signal when there is an overcurrent. It also performs current change rate detection on the signal output during current sampling and performs short circuit judgment in conjunction with the set change threshold. When there is a short circuit, it outputs the second detection signal.

[0046] The socket control module 4 is connected to the power module 1 and is used to receive mains power and distribute mains power through multiple circuits via the main socket and multiple branch sockets in parallel.

[0047] The microcontroller module 3 is connected to the socket control module 4, the current detection module 2, and the power distribution control module 5. It is used to control the socket control module 4 to receive mains power. When the first detection signal is received, the microcontroller module 4 controls multiple branch sockets in the socket control module 4 to be de-energized sequentially until it stops receiving the first detection signal. When DC power is connected to a branch socket, the microcontroller module 5 controls the power distribution control module 5 to perform boost and inversion processing on the DC power. When a branch socket of the socket control module 4 is de-energized or needs to provide DC power, the microcontroller module 5 controls the power distribution control module 5 to switch the power transmission path. During the provision of DC power, the microcontroller module 4 controls the branch socket providing DC power to be de-energized and controls the power distribution control module 5 to perform step-down. When all branch sockets are de-energized and the first detection signal or the second detection signal is still received, the microcontroller module 4 controls the socket control module 4 to stop receiving mains power.

[0048] The power distribution control module 5, connected to the socket control module 4, is used to boost and invert the DC power connected to a branch socket and distribute the processed power to the unpowered branch socket by switching the power transmission path. When DC power is needed, the connected mains power is transformed, rectified and stepped down. When the branch socket is unpowered, the power transmission path is switched and the mains power is transmitted to the unpowered branch socket.

[0049] Furthermore, the power distribution control module 5 includes a power conversion unit 501 and a transmission switching unit 502;

[0050] The power conversion unit 501 is used to boost and invert the DC power input to a branch socket, and to transform, rectify and step down the mains power input.

[0051] The transmission switching unit 502 is connected to the power conversion unit 501 and is used to distribute the power processed by the power conversion unit 501 to the branch socket without power by switching the power transmission path. When the branch socket is without power, the power transmission path is switched and the mains power is transmitted to the branch socket without power.

[0052] In a specific embodiment, the power module 1 can be a power circuit composed of a mains power interface and a sliding switch, which can control the transmission status of the connected mains power; the current detection module 2 can be a current detection circuit composed of a current transformer, diode, operational amplifier, rate of change detection device, comparator, etc., which can sample the current of the live wire of the power module 1, amplify the sampled signal, and compare the processed signal with a set overcurrent threshold to determine overcurrent; it can also differentiate the sampled signal and superimpose the differentiated signal with the sampled signal to detect the rate of change of current, and compare the rate of change of current with a set threshold to determine short circuit; the microcontroller module 3 can be a microcontroller circuit composed of a microcontroller, logic unit, and self-locking device, integrating an arithmetic unit, logic unit, and comparator. The system comprises numerous components such as controllers, memory, and input / output devices, enabling functions such as signal processing, data storage, module control, and timing control. It also self-locks high-level signals and controls the power redistribution of the power distribution control module 5 based on the power-off state of the control socket control module 4. The aforementioned socket control module 4 can employ a socket control circuit composed of relays and multiple sockets, which can be divided into main sockets and multiple branch sockets for multi-path power distribution control. The aforementioned power distribution control module 5 can employ a power distribution control circuit composed of IGBTs, bidirectional inverters, inductors, transformers, and thyristors. It can perform power transmission control, boosting, inversion, and transformation processing on the input DC power, and provide AC power to the socket control module 4. It can also perform transformation, rectification, bucking, and power transmission control on the mains power, and provide AC power to the socket control module 4.

[0053] In this embodiment, please refer to Figure 3 and Figure 6 The power module 1 includes an AC power interface and a sliding switch; the current detection module 2 includes a first current transformer CT1; the socket control module 4 includes a first relay K1 and a first socket 10; and the microcontroller module 3 includes a first controller U1.

[0054] Specifically, the live wire and neutral wire of the mains power interface are connected to the first input terminal and the second input terminal of the slide switch, respectively. The first output power of the slide switch is connected to the first detection terminal of the first current transformer CT1. The second detection terminal of the first current transformer CT1 is connected to the first moving terminal of the first relay K1. The second output terminal of the slide switch is connected to the second moving terminal of the first relay K1. The first stationary terminal and the second stationary terminal of the first relay K1 are connected to the first terminal and the second terminal of the first socket 10, respectively. The ground wire of the mains power interface is connected to the third terminal of the first socket 10. The control terminal of the first relay K1 is connected to the IO1 terminal of the first controller U1.

[0055] In a specific embodiment, the first current transformer CT1 can be a current transformer; the first stationary terminal, the first moving terminal, the second stationary terminal, and the second moving terminal of the first relay K1 are the switching part, which is composed of a double-pole single-throw switch, and the double-pole single-throw switch is a normally closed switch; the control terminal of the first relay K1 is the electromagnetic coil part of the relay, which controls the on and off states of the double-pole single-throw switch; the first controller U1 can be an STM32 microcontroller; the first socket 10 can be used as the main socket.

[0056] Furthermore, the socket control module 4 also includes a second relay K2, a second socket 11, a third relay K3, a third socket 12, a fourth relay K4, and a fourth socket 13;

[0057] Specifically, the first stationary terminal of the second relay K2 is connected to the first stationary terminal of the first relay K1, the first stationary terminal of the third relay K3, and the first stationary terminal of the fourth relay K4. The second stationary terminal of the second relay K2 is connected to the second stationary terminal of the first relay K1, the second stationary terminal of the third relay K3, and the second stationary terminal of the fourth relay K4. The first moving terminal and the second moving terminal of the second relay K2 are respectively connected to the first and second terminals of the second socket 11. The first moving terminal and the second moving terminal of the third relay K3 are respectively connected to the first and second terminals of the third socket 12. The first moving terminal and the second moving terminal of the fourth relay K4 are respectively connected to the first and second terminals of the fourth socket 13. The third terminals of the second socket 11, the third socket 12, and the fourth socket 13 are all connected to the ground wire of the mains port. The control terminals of the second relay K2, the third relay K3, and the fourth relay K4 are respectively connected to the IO2, IO3, and IO4 terminals of the first controller U1.

[0058] In a specific embodiment, the selection of the second relay K2, the third relay K3 and the fourth relay K4 is the same as that of the first relay K1; the second socket 11, the third socket 12 and the fourth socket 13 are all used as one of the multiple branch sockets.

[0059] In another embodiment, the multiple branch sockets are not limited to the second socket 11, the third socket 12, and the fourth socket 13 mentioned above. Branch socket expansion is also possible, using four sets of relays and four sets of branch sockets to form four expanded sets of branch sockets 14 for multi-channel power distribution control. The first socket 10, the second socket 11, the third socket 12, the fourth socket 13, and the expanded four sets of branch sockets 14 are all three-hole sockets, which can be placed sequentially on a power socket. The specific structure of the power socket can be found in [reference needed]. Figure 6 .

[0060] Furthermore, the current detection module 2 also includes a fourth resistor R4, a first diode D1, a second diode D2, a first operational amplifier OP1, a first resistor R1, a second resistor R2, a first capacitor C1, and a rate of change detection device.

[0061] Specifically, the anode of the first diode D1 is connected to the first output terminal of the first current transformer CT1, the cathode of the second diode D2, the non-inverting terminal of the first operational amplifier OP1, one end of the second resistor R2, one end of the first resistor R1, and the input terminal of the change detection device. It is also connected to the second output terminal of the first current transformer CT1, the cathode of the first diode D1, the anode of the second diode D2, the non-inverting terminal of the first operational amplifier OP1, and the ground terminal through the fourth resistor R4. The output terminal of the first operational amplifier OP1 is connected to the other end of the first resistor R1 and the IO5 terminal of the first controller U1. It is also connected to the other end of the second resistor R2 through the first capacitor C1. The output terminal of the change detection device is connected to the IO11 terminal of the first controller U1.

[0062] In a specific embodiment, the first operational amplifier OP1 can be an OP07 operational amplifier, which, together with the first diode D1, the second diode D2, the first resistor R1, the second resistor R2, and the first capacitor C1, performs signal amplification processing. The rate of change detection device can be composed of a non-inverting amplifier circuit consisting of an operational amplifier and resistors, an inverse function differential detection circuit consisting of an operational amplifier, resistors, and capacitors, and a short-circuit detection circuit consisting of a comparator and a reference power supply. The non-inverting amplifier circuit amplifies the signal, and the inverse function differential detection circuit converts the amplified signal into a differential signal and superimposes it with the amplified signal to output the rate of change of current. The short-circuit detection circuit sets a change threshold, and when the voltage of the current change rate is greater than the change threshold, it outputs a high level indicating that a short circuit has occurred.

[0063] Furthermore, the current detection module 2 also includes a third resistor R3, a first comparator A1, and a first reference power supply VF1;

[0064] Specifically, the non-inverting input of the first comparator A1 is connected to the output of the first operational amplifier OP1 through the third resistor R3, the inverting input of the first comparator A1 is connected to the first reference power supply VF1, and the output of the first comparator A1 is connected to the IO6 terminal of the first controller U1.

[0065] In a specific embodiment, the first comparator A1 can be an LM358 comparator; the first reference power supply VF1 can be set with an overcurrent threshold.

[0066] Furthermore, the microcontroller module 3 also includes a self-locking device, a first logic unit J1, and a second logic unit J2;

[0067] Specifically, the input terminal of the self-locking device is connected to the output terminal of the first comparator A1, the output terminal of the self-locking device is connected to the IN1 terminal of the first logic J1, the IN1 terminal of the second logic J2 and the IO12 terminal of the first controller U1, and the IN2 terminal of the first logic J1 and the IN2 terminal of the second logic J2 are respectively connected to the IO2 terminal and the IO3 terminal of the first controller U1.

[0068] In a specific embodiment, the above-mentioned self-locking device may be composed of a transistor and a resistor to perform self-locking processing on a high level; the first logic device J1 and the second logic device J2 are both AND gates.

[0069] Furthermore, the power conversion unit 501 includes a first thyristor S1, a third diode D3, a fourth diode D4, a first inductor L1, a third capacitor C3, a first power transistor Q1, a second power transistor Q2, a first inverter T1, a second capacitor C2, a second inductor L2, and a first transformer B1.

[0070] Specifically, one end of the first thyristor S1 is connected to the first end of the fourth socket 13, and the other end of the first switching transistor is connected to the emitter of the first power transistor Q1 and the collector of the second power transistor Q2 through the first inductor L1. The collector of the first power transistor Q1 is connected to one end of the DC side of the first inverter T1, and the emitter of the second power transistor Q2 is connected to the second end of the fourth socket 13 and one end of the DC side of the first inverter T1. One end of the AC side of the first inverter T1 is connected to the first end of the primary side of the first transformer B1 through the second capacitor C2 and the second inductor L2 in sequence. The other end of the AC side of the first inverter bridge is connected to the second end of the primary side of the first transformer B1. The control terminal of the first thyristor S1 is connected to the cathode of the third diode D3 and the cathode of the fourth diode D4 and grounded through the third capacitor C3. The anode of the third diode D3 is connected to the IO8 terminal of the first controller U1 and the gate of the second power transistor Q2. The anode of the fourth diode D4 is connected to the gate of the first power transistor Q1 and the IO7 terminal of the first controller U1.

[0071] In a specific embodiment, the first thyristor S1 can be a bidirectional thyristor; the first power transistor Q1 and the second power transistor Q2 can both be IGBTs, which are used in conjunction with the first inductor L1 for step-down and step-up processing; the first inverter T1 can be an IGBT with four sets of parallel diodes for inversion and rectification.

[0072] Furthermore, the transmission switching unit 502 includes a second thyristor S2, a third thyristor S3, a fourth thyristor S4, a fifth thyristor S5, a sixth thyristor S6, and a seventh thyristor S7.

[0073] Specifically, one end of the second thyristor S2 is connected to one end of the fifth thyristor S5 and one end of the seventh thyristor S7; one end of the third thyristor S3 is connected to one end of the fourth thyristor S4 and one end of the sixth thyristor S6; the other end of the fourth thyristor S4 and the other end of the fifth thyristor S5 are respectively connected to the first and second ends of the second socket 11; the other end of the sixth thyristor S6 and the other end of the seventh thyristor S7 are respectively connected to the first and second ends of the third socket 12; the other end of the third thyristor S3 and the other end of the second thyristor S2 are respectively connected to the first stationary end and the second stationary end of the first relay K1; and the control terminals of the second thyristor S2 and the third thyristor S3 are both connected to the IO10 terminal of the first controller U1.

[0074] In a specific embodiment, the second thyristor S2, the third thyristor S3, the fourth thyristor S4, the fifth thyristor S5, the sixth thyristor S6, and the seventh thyristor S7 can all be bidirectional thyristors, wherein the fourth thyristor S4 and the fifth thyristor S5 supply power to the second socket 11, and the sixth thyristor S6 and the seventh thyristor S7 supply power to the third socket 12.

[0075] In another embodiment, when expanding branch sockets, for example, expanding four sets of branch sockets, two sets of bidirectional thyristors and one set of logic devices are used for each expanded branch socket to perform power distribution switching control. The working mode is the same as the working mode of the part composed of the fourth thyristor S4, the fifth thyristor S5, the second socket 11 and the first logic device J1.

[0076] In this embodiment, please refer to Figure 7 The present invention also proposes a power socket power distribution control method, which is applied to the above-mentioned field-effect transistor aging test screening system. The steps of the method include:

[0077] Step 100: Obtain the signal output by the current detection module when performing overcurrent detection or short circuit detection;

[0078] Step 200: The control module receives mains power and distributes it through multiple circuits via the main socket and multiple branch sockets in parallel.

[0079] Step 300: During an overcurrent event, multiple branch sockets in the control module are sequentially de-energized until the overcurrent disappears. When DC power is connected to a branch socket, the power distribution control module performs boost and inversion processing on the DC power. When a branch socket is de-energized or needs to provide DC power, the power distribution control module switches the power transmission path, de-energizes the branch socket providing DC power, and performs step-down regulation. When all branch sockets are de-energized but overcurrent still occurs, the control module stops receiving mains power.

[0080] Step 400: In the event of a short circuit, the control port control module stops receiving mains power.

[0081] The working principle of a power socket power distribution control system of the present invention is as follows: Mains power is connected through the mains interface. The transmission of mains power is controlled by a sliding switch. The power is transmitted through the switching section of the first relay K1 and supplies power to the first socket 10. The power is transmitted through the switching sections of the second relay K2, third relay K3, and fourth relay K4 and distributes power to the second socket 11, third socket 12, and fourth socket 13 respectively. The transmitted mains power is sampled by the first current transformer CT1 and the fourth resistor R4. The signal is amplified by the first operational amplifier OP1 in conjunction with the first diode D1, second diode D2, first resistor R1, second resistor R2, and first capacitor C1. The amplified signal is received by the IO5 terminal of the first controller U1. When the signal exceeds the overcurrent threshold set by the first reference power supply VF1, the first comparator A1 outputs a first detection signal, which is received by the IO6 terminal of the first controller U1. If the rate of change detection device does not detect an abnormal current rate of change, the IO4, IO3, and IO2 terminals of the first controller U1 will sequentially output high levels, thereby controlling the power distribution status of the fourth socket 13, the third socket 12, and the second socket 11. Specifically, if the third socket 12 is stopped from distributing power at the IO3 terminal, the first comparator A1 outputs a low level, indicating that the overcurrent has disappeared and the power distribution is within the power strip's tolerance range. It will then normally control the power supply status of the second socket 11 and the first socket 10. If the fourth socket 13 is connected to an external power supply via a three-hole socket at this time... When powered by DC, the external power supply can be a lithium battery connected to the fourth socket 13 via a three-prong plug. The IO8 terminal of the first controller U1 controls the second power transistor Q2 and the first thyristor S1 to conduct. The third capacitor C3 stores energy and maintains the conduction of the first thyristor S1, working with the first inductor L1 and the first power transistor Q1 to boost the voltage. The IO9 terminal of the first controller U1 provides four sets of pulse signals to the first inverter T1 to control the first inverter T1 to perform inversion. The second capacitor C2, the second inductor L2, and the first transformer B1 perform filtering and transformation. At the same time, the self-locking device self-locks upon receiving the first detection signal, triggering the IN1 terminal of the first logic device J1 and the IN1 terminal of the second logic device J2 to go high. At this time, the second logic device J2... The OUT terminal of the controller will control the sixth thyristor S6 and the seventh thyristor S7 to conduct, so that the transformed electrical energy is transmitted to the third socket 12, maintaining the power distribution state of the third socket 12. Similarly, when the first controller U1 controls the second socket 11 to stop working, the transformed electrical energy can also be distributed to the second socket 11. If the branch sockets, i.e., the second socket 11 to the fourth socket 13, all stop distributing power, but the overcurrent has not disappeared or the rate of change detection device detects a short circuit, the IO1 terminal of the first controller U1 will control the first relay K1 to stop distributing power. When the socket control module 4 needs to provide DC power, the IO10 terminal of the first controller U1 can control the second switch and the third thyristor S3 to conduct, and the IO4 terminal controls the fourth socket 13 to stop distributing AC power.After transformation, filtering, and rectification by the first transformer B1, the second capacitor C2, the second inductor L2, and the first inverter T1, the IO7 terminal of the first controller U1 controls the first power transistor Q1 to conduct, which, together with the second power transistor Q2 and the first inductor L1, performs voltage reduction. DC power is then supplied to the fourth socket 13 via the first thyristor S1. If the second socket 11 or the third socket 12 cannot be powered due to the second relay K2 or the third relay K3 being open-circuited, the IO12 terminal can provide a high level, and the IO10 terminal... The second and third thyristors S2 and S3 are turned on. The first controller U1 disconnects the faulty second relay K2 and maintains power distribution to the second socket 11 through the fourth thyristor S4 and the fifth switch. The first controller U1 disconnects the faulty third relay K3 and maintains power distribution to the third socket 12 through the sixth and seventh thyristors S6 and S7. When it is necessary to expand the branch sockets to four sets, the control method of the four sets of branch sockets is the same as the control method of the second socket 11 and the third socket 12.

[0082] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0083] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style 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 power socket power distribution control system, characterized in that, The circuit includes: The power module is used to connect to the mains power supplied by the power grid; The current detection module, connected to the power supply module and the socket control module, is used to sample and amplify the mains power input to the socket control module. It performs overcurrent detection on the processed signal according to the set overcurrent threshold and outputs the first detection signal when overcurrent occurs. It also performs current change rate detection on the signal output during current sampling and performs short circuit judgment in conjunction with the set change threshold. When a short circuit occurs, it outputs the second detection signal. The socket control module, connected to the power module, is used to receive mains power and distribute it through multiple main sockets and branch sockets in parallel. The microcontroller module, connected to the socket control module, current detection module, and power distribution control module, is used to control the socket control module to receive mains power. When the first detection signal is received, it controls multiple branch sockets in the socket control module to be de-energized sequentially until the first detection signal is stopped. When DC power is connected to a branch socket, it controls the power distribution control module to perform boost and inversion processing on the DC power. When a branch socket of the socket control module is de-energized or needs to provide DC power, it controls the power distribution control module to switch the power transmission path. During the provision of DC power, it controls the branch socket in the socket control module to be de-energized and controls the power distribution control module to step down the voltage. When all branch sockets are de-energized but still receiving the first detection signal or receiving the second detection signal, it controls the socket control module to stop receiving mains power. The power distribution control module, connected to the socket control module, is used to boost and invert the DC power supplied to a branch socket and distribute the processed power to the unpowered branch socket by switching the power transmission path. When DC power is needed, the connected mains power is transformed, rectified and stepped down. When the branch socket is unpowered, the power transmission path is switched and the mains power is transmitted to the unpowered branch socket.

2. The power distribution control system for a power socket according to claim 1, characterized in that, The power distribution control module includes a power conversion unit and a transmission switching unit; The power conversion unit is used to boost and invert the DC power input to one branch socket, and to transform, rectify and step down the mains power input. The transmission switching unit, connected to the power conversion unit, is used to distribute the power processed by the power conversion unit to the unpowered branch sockets by switching the power transmission path. When the branch socket is unpowered, the power transmission path is switched and the mains power is transmitted to the unpowered branch socket.

3. A power socket power distribution control system according to claim 2, characterized in that, The power module includes an AC interface and a sliding switch; the current detection module includes a first current transformer; the socket control module includes a first relay and a first socket; the microcontroller module includes a first controller. The live wire and neutral wire of the mains power interface are respectively connected to the first input terminal and the second input terminal of the slide switch. The first output power of the slide switch is connected to the first detection terminal of the first current transformer. The second detection terminal of the first current transformer is connected to the first moving terminal of the first relay. The second output terminal of the slide switch is connected to the second moving terminal of the first relay. The first stationary terminal and the second stationary terminal of the first relay are respectively connected to the first terminal and the second terminal of the first socket. The ground wire of the mains power interface is connected to the third terminal of the first socket. The control terminal of the first relay is connected to the IO1 terminal of the first controller.

4. A power socket power distribution control system according to claim 3, characterized in that, The socket control module also includes a second relay, a second socket, a third relay, a third socket, a fourth relay, and a fourth socket; The first stationary terminal of the second relay is connected to the first stationary terminal of the first relay, the first stationary terminal of the third relay, and the first stationary terminal of the fourth relay. The second stationary terminal of the second relay is connected to the second stationary terminal of the first relay, the second stationary terminal of the third relay, and the second stationary terminal of the fourth relay. The first moving terminal and the second moving terminal of the second relay are respectively connected to the first and second terminals of the second socket. The first moving terminal and the second moving terminal of the third relay are respectively connected to the first and second terminals of the third socket. The first moving terminal and the second moving terminal of the fourth relay are respectively connected to the first and second terminals of the fourth socket. The third terminals of the second socket, the third socket, and the fourth socket are all connected to the ground wire of the mains port. The control terminals of the second relay, the third relay, and the fourth relay are respectively connected to the IO2, IO3, and IO4 terminals of the first controller.

5. A power socket power distribution control system according to claim 4, characterized in that, The current detection module also includes a fourth resistor, a first diode, a second diode, a first operational amplifier, a first resistor, a second resistor, a first capacitor, and a rate of change detection device; The anode of the first diode is connected to the first output terminal of the first current transformer, the cathode of the second diode, the non-inverting terminal of the first operational amplifier, one end of the second resistor, one end of the first resistor, and the input terminal of the change detection device. It is also connected to the second output terminal of the first current transformer, the cathode of the first diode, the anode of the second diode, the non-inverting terminal of the first operational amplifier, and the ground terminal through a fourth resistor. The output terminal of the first operational amplifier is connected to the other end of the first resistor and the IO5 terminal of the first controller. It is also connected to the other end of the second resistor through a first capacitor. The output terminal of the change detection device is connected to the IO11 terminal of the first controller.

6. A power socket power distribution control system according to claim 5, characterized in that, The current detection module also includes a third resistor, a first comparator, and a first reference power supply; The non-inverting input of the first comparator is connected to the output of the first operational amplifier through a third resistor, the inverting input of the first comparator is connected to the first reference power supply, and the output of the first comparator is connected to the IO6 terminal of the first controller.

7. A power socket power distribution control system according to claim 6, characterized in that, The microcontroller module also includes a self-locking device, a first logic unit, and a second logic unit; The input terminal of the self-locking device is connected to the output terminal of the first comparator, and the output terminal of the self-locking device is connected to the IN1 terminal of the first logic device, the IN1 terminal of the second logic device, and the IO12 terminal of the first controller. The IN2 terminal of the first logic device and the IN2 terminal of the second logic device are respectively connected to the IO2 terminal and the IO3 terminal of the first controller.

8. A power socket power distribution control system according to claim 7, characterized in that, The power conversion unit includes a first thyristor, a third diode, a fourth diode, a first inductor, a third capacitor, a first power transistor, a second power transistor, a first inverter, a second capacitor, a second inductor, and a first transformer; One end of the first thyristor is connected to the first end of the fourth socket. The other end of the first switching transistor is connected to the emitter of the first power transistor and the collector of the second power transistor through the first inductor. The collector of the first power transistor is connected to one end of the DC side of the first inverter. The emitter of the second power transistor is connected to the second end of the fourth socket and one end of the DC side of the first inverter. One end of the AC side of the first inverter is connected to the first end of the primary side of the first transformer through the second capacitor and the second inductor in sequence. The other end of the AC side of the first inverter bridge is connected to the second end of the primary side of the first transformer. The control terminal of the first thyristor is connected to the cathode of the third diode and the cathode of the fourth diode and grounded through the third capacitor. The anode of the third diode is connected to the IO8 terminal of the first controller and the gate of the second power transistor. The anode of the fourth diode is connected to the gate of the first power transistor and the IO7 terminal of the first controller.

9. A power socket power distribution control system according to claim 8, characterized in that, The transmission switching unit includes a second thyristor, a third thyristor, a fourth thyristor, a fifth thyristor, a sixth thyristor, and a seventh thyristor; One end of the second thyristor is connected to one end of the fifth thyristor and one end of the seventh thyristor. One end of the third thyristor is connected to one end of the fourth thyristor and one end of the sixth thyristor. The other ends of the fourth thyristor and the fifth thyristor are respectively connected to the first and second ends of the second socket. The other ends of the sixth thyristor and the seventh thyristor are respectively connected to the first and second ends of the third socket. The other ends of the third thyristor and the second thyristor are respectively connected to the first and second stationary ends of the first relay. The control terminals of the second and third thyristors are both connected to the IO10 terminal of the first controller.

10. A power distribution control method for a power socket, characterized in that, The control method, applied to the power socket power distribution control system according to claims 1-9, includes the following steps: Acquire the signal output by the current detection module when performing overcurrent detection or short circuit detection; The control module receives mains power and distributes it through multiple circuits via the main socket and multiple branch sockets in parallel. During an overcurrent event, multiple branch sockets in the control module are sequentially de-energized until the overcurrent disappears. When DC power is connected to a branch socket, the power distribution control module boosts and inverts the DC power. When a branch socket is de-energized or needs to provide DC power, the power distribution control module switches the power transmission path, de-energizes the branch socket providing DC power, and performs voltage reduction regulation. When all branch sockets are de-energized but overcurrent still occurs, the control module stops receiving AC mains power. In the event of a short circuit, the control module of the control port stops receiving mains power.

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