50 results about "Reverse connection" patented technology

This invention provides a DC power input reverse connection compatible circuit, a power supply circuit, and a household appliance. The DC power input reverse connection compatible circuit includes a first diode, a second diode, a third diode, and a control switch. The anode of the first diode is electrically connected to the positive input terminal, and the cathode of the first diode is electrically connected to the positive output terminal. The cathode of the second diode is electrically connected to the positive output terminal, and the anode of the second diode is electrically connected to the negative output terminal. The anode of the third diode is electrically connected to the negative output terminal, and the cathode of the third diode is electrically connected to the negative input terminal. The first terminal of the control switch is electrically connected to the negative input terminal, and the second terminal of the control switch is electrically connected to the positive output terminal. A reverse connection detection circuit is used to acquire the reverse connection signal between the positive and negative input terminals, and controls the control switch to turn on or off based on the reverse connection signal. This invention is compatible with both forward and reverse DC power connections and improves circuit safety during reverse connections.

A small night light circuit supporting 0V charging and battery reverse connection installation includes charging chip U1, battery BAT, delay circuit, charging battery polarity detection circuit, double MOS anti-backflow circuit and separate battery power supply anti-reverse connection circuit. The delay circuit is turned on when the TYPE interface is inserted, and the battery is pre-charged; the polarity detection circuit uses a low-power comparator to detect the voltage difference between the two ends of the battery. A 10mV voltage difference between the positive and negative phases can reverse the output. After pre-charging, the voltage difference of the battery increases, and the comparator output high level maintains the continuous work of the charging chip, realizing 0V battery wake-up and polarity recognition; the double MOS anti-backflow circuit is cut off when the TYPE is pulled out, preventing the battery voltage from backflowing to the charging chip; the separate battery power supply anti-reverse connection circuit uses a lithium battery protection chip RB302B to isolate the ground when the battery is reversed, making the battery invalid. The application realizes multiple goals of 0V battery wake-up, anti-reverse connection, anti-backflow and low power consumption, and has the advantages of high reliability and high safety.

This invention discloses a reverse connection protection system and a reverse connection detection method. The reverse connection protection system includes: multiple DC / DC boost units connected between corresponding DC power supplies and a common DC bus; each DC / DC boost unit includes an inductor L, a boost diode D, and a main switch Q; wherein the inductor L and the boost diode D are connected in series between the positive output terminal of the DC power supply and the positive bus, and the main switch Q is connected in parallel with the DC power supply and located between the inductor L and the boost diode D; multiple reverse connection protection units are connected in parallel with the corresponding main switch Q and located between the inductor L and the boost diode D; the multiple reverse connection protection units include at least one enhanced protection unit, including a first branch and a second branch connected in parallel; the first branch is configured to allow current to flow from the negative bus to the positive bus, and when the second branch is turned on, it is configured to allow current to flow between the negative bus and the positive bus, for detecting current characteristics.

The utility model discloses an intelligent power distribution device, include: overcurrent protection circuit, prevent reverse connection protection circuit, one -way conducting element, first input port for connecting power supply, second input port and be used for connecting output load's output port, overcurrent protection circuit is used for when the output current of power supply is greater than the set threshold value, cut off the pass between power supply and output load, the first end of prevent reverse connection protection circuit connects output port, the second end of prevent reverse connection protection circuit connects the first end of one -way conducting element, and the second end of one -way conducting element connects the second input terminal, prevent reverse connection protection circuit is used for when the negative pole of power supply is connected to the first input port and the positive pole of power supply is connected to the second input port, increase the resistance of self, to reduce the current that flows through one -way conducting element. The utility model can solve the problem that the current that flows through one -way conducting element is too big when the positive pole and the negative pole of power supply are connected reversely, causes its damage.

This application provides a master-slave switching circuit based on USB 2.0 communication, including a communication circuit module and a charging circuit module. The charging circuit module includes a rectifier and filter circuit, a reverse connection protection circuit, a DC-DC circuit, and a Block MOSFET circuit connected in sequence. Power is supplied through a power connector to the rectifier and filter circuit, and then output to the HUB IC by the Block MOSFET circuit. The communication circuit module includes a Type-C interface and a Type-A interface, both integrated into a single communication signal transmitted to the vehicle's infotainment system via the HUB IC. Furthermore, a switching detection circuit and an output VBUS level control circuit are connected between the HUB IC and the vehicle's infotainment system for power management of the master-slave switching circuit. Through precise level detection and control, this application enables intelligent power switching, ensuring safe communication between the vehicle's infotainment system and external devices, enhancing device protection, and improving the user experience. This circuit design not only optimizes power management but also provides higher reliability and security for the vehicle's infotainment system.

The present disclosure provides an earphone, a connection method and apparatus therefor, and a medium. The method comprises: acquiring first location information of a first electronic device to be back-connected; wherein the first location information is location information of the first electronic device during a last communication connection with the earphone; acquiring current location information of a second electronic device that has already established a communication connection; if a distance between the first location information and the current location information is outside a set distance range, adjusting a back-connecting parameter for back-connecting the first electronic device; and back-connecting the first electronic device according to an adjusted back-connecting parameter.

This application discloses a photovoltaic system, a DC combiner box, and a fault isolation method, including: a fault isolation circuit and a DC / DC conversion circuit; the first end of the fault isolation circuit is connected to N photovoltaic strings, and the second end of the fault isolation circuit is connected to the input end of the DC / DC conversion circuit; the fault isolation circuit includes a multi-pole switch, and each group of photovoltaic strings in the N photovoltaic strings is connected to the input end of the power conversion circuit through the same pole switch in the multi-pole switch; each group of photovoltaic strings includes at least two photovoltaic strings; when a reverse connection fault exists in the N photovoltaic strings, the multi-pole switches are all disconnected in a coordinated manner, thereby reducing the complexity of the hardware structure and reducing the cost of the fault isolation circuit.

This utility model relates to an instrument panel reverse connection protection power supply assembly in the field of automotive electronics technology. It includes: a power plug and a power socket used in conjunction with each other; a plug housing fixedly connected to the power plug; positive and negative pins symmetrically fixedly connected in the plug housing and electrically connected to the power supply wiring harness on the power plug; a slot on the power socket that mates with the plug housing; and a conductive base fixedly connected in the slot, electrically connected to the power supply wiring harness on the power socket. Using this structure, reverse connection can be prevented from the source. During vehicle maintenance and repair, even if an operator mistakenly attempts to reverse the connection, it will be unable to be inserted due to the mismatch between the pin and socket sizes. This effectively avoids damage to internal electronic components of the vehicle's instrument panel caused by reverse connection, reduces maintenance costs and failure risks, and ensures long-term reliable operation of the instrument system.

This invention provides a reverse connection short-circuit protection device for power supply ports, comprising a main assembly with two symmetrically arranged protective components inside. Each protective component includes a guide sleeve, a spring, a slide rod, a conductor, a first contact, a second contact, and a magnet. A spring is fixedly connected to the inner wall of the guide sleeve, and a slide rod is fixedly connected to one end of the spring. The slide rod is slidably connected to the inner wall of the guide sleeve, and a conductor is fixedly connected to one end of the slide rod. A first contact and a second contact are arranged on one side of the conductor, and a magnet is fixedly connected to one end of the conductor. This invention connects two first connecting posts with a wire and installs a protective resistor within it. When energized, the wound first wire generates a magnetic field that attracts or pushes away the magnet, thereby disconnecting or connecting the power supply circuit, achieving the function of preventing reverse connection and protecting circuit safety. By triggering the positive and negative protection devices, the power supply to the system is disconnected, preventing the system from burning out due to a short circuit.

This utility model discloses a protection system for a charging device of a mobile energy storage power station for railway ferries, belonging to the field of railway ferry energy storage technology. It includes a PLC, a charging control module, contactors K1, K2, and K3, a mains power detection module, a battery pack, a DC / DC module, a reverse connection protection module, and a connector plug. It solves the technical problem of hard protection for DC power supplies based on three-contactor interlock control and hardware-level reverse connection isolation. This utility model does not rely on host computer programs or embedded logic control. Through the independent configuration of K1 discharge control, K2 charging control, and K3 output control, and the design of an auxiliary contact interlock mechanism, it effectively prevents malfunctions and mixed use of charging and discharging paths, achieves automatic switching between charging and discharging modes, prevents back current surges from external loads, improves system anti-interference and battery safety, and ensures stable operation under conditions such as humidity, mobility, and strong interference.

This invention provides a reverse connection protection circuit for suppressing common-mode circulating current in the DC auxiliary power supply of an inverter. The circuit includes diodes D5, D6, D7, and D8, a Zener diode D9, an NMOS transistor Q3, an optocoupler U1, resistors R11, R12, R13, and R14, capacitors C6, C7, and C8. The power supply terminals are the battery positive terminal (BAT+) and the battery negative terminal (BAT-), and the power supply output terminals are the DC auxiliary power supply positive terminal (DC+) and the DC auxiliary power supply negative terminal (DC-). This invention addresses the problem of unstable DC auxiliary power supply in photovoltaic and energy storage inverters due to common-mode interference, improves the reliability of energy storage systems, and enables DC reverse connection detection, facilitating rapid on-site assembly by construction personnel.

An automatic switching circuit for input reverse connection protection includes: an optocoupler (U1), a relay (K1), and a first diode (D1); a DC device is connected to the input terminal of the optocoupler (U1), the polarity of the input terminal of the optocoupler (U1) being opposite to the correct polarity of the DC device; the output terminal of the optocoupler (U1) is connected to the control terminal of the relay (K1); the input terminal of the relay (K1) is connected in parallel with the input terminal of the optocoupler (U1); both the normally closed contact and the normally open contact of the relay (K1) are connected to the output terminal of the relay (K1), but with opposite output polarities; the first diode (D1) is placed on the positive terminal line of the output terminal of the relay (K1), and the cathode side of the first diode (D1) is connected to the positive terminal of the output terminal of the relay (K1). By employing this circuit, damage to electronic components caused by reverse polarity is reduced, ensuring system safety, and allowing normal operation even under reverse polarity conditions.

This utility model relates to the field of chip port protection circuit technology, and provides an overvoltage reverse connection short circuit protection circuit, including: a low-side reverse connection protection circuit, a protection circuit A, a protected circuit, a protection circuit C, and a protection circuit B. The low-side reverse connection protection circuit includes a second high-voltage NMOS transistor, a fourth Zener diode, and a fifth resistor; the VDDE port of the protection circuit A is connected to the external power supply VDDE port, and the VSSE port of the protection circuit A is connected to the source of the second high-voltage NMOS transistor Q4 of the low-side reverse connection protection circuit; the VDD and VSS ports of the protection circuit A are respectively connected to the protected circuit; the protected circuit includes a core circuit and an output stage circuit; the protection circuit C includes a third high-voltage NMOS transistor, a fifth Zener diode, and a sixth resistor. This utility model can protect the chip when overvoltage, reverse connection, or short circuit occurs between the OUT, VDDE, and VSSE ports.

This application discloses a magnetic levitation molecular pump operation testing device, comprising: a testing platform with a plurality of connection structures spaced apart thereon, including forward connection structures and reverse connection structures. The forward connection structures are used for connection and fixation when the molecular pump body is installed upright, and the reverse connection structures are used for connection and fixation when the molecular pump body is installed upside down; a testing connection unit disposed below the testing platform, the testing connection unit including a cable unit for connecting to the molecular pump body under test, a cooling pipeline, and a vacuum pipeline; and a testing control system electrically connected to the cable unit. This magnetic levitation molecular pump operation testing device provides a reliable molecular pump operation testing environment, improves the testing efficiency of the molecular pump, and enhances the safety of the testing environment.

The utility model discloses a kind of anti-reverse connection light emitting diodes of double-lead pin misplacement distribution, belong to electronic component design field, including shell assembly, still include lead pin assembly, fixedly connected on shell assembly;Light emitting component, fixedly connected on shell assembly;The shell assembly, including nut, still include screw shell rotationally connected on nut, thread being opened on screw shell, filling material being fixedly connected on screw shell.The utility model adds anode sleeve with the shape of "+" and cathode sleeve with the shape of "-" in terminal post position, identifies terminal post, even if with the characteristics of unequal length in terminal post, additionally increase the difference of shape, it is convenient for lineman to identify, and in lead pin assembly, except terminal post, the rest is made of insulating luminous material, can satisfy the requirement that also can be clearly identified at night.

This invention provides a protection circuit and control method for preventing reverse connection of loads in lithium battery power supply, relating to the field of lithium battery power system technology. It includes a lithium battery pack, a battery management system (BMS), an insulation detection module (IMD), a vehicle control unit (VCU), and a motor control unit (MCU). The lithium battery pack is communicatively connected to the BMS. The positive terminal of the lithium battery pack is connected to the MCU via relays K1, K3, a pre-charge resistor R, and K4. The negative terminal of the lithium battery pack is connected to the IMD via relay K2 and to the MCU via relay K5. The BMS is connected to the IMD and the VCU. This invention features a dual polarity detection and comparison mechanism, providing system-level collaborative protection, comprehensive pre-charge protection, automated operation, reduced human error, and fault self-recovery capability.

The reverse-connection-protected low-dropout linear regulator circuit, electronic chip, and vehicle system provided in the embodiments of this disclosure include: a first power module, a second power transistor, a reverse-connection protection module, and a drive module. The first terminal of the second power transistor is electrically connected to an input node, and the second terminal of the second power transistor and the first terminal of the first power transistor are electrically connected to a sampling node. The second terminal of the first power transistor is electrically connected to an output node. The sampling voltage of the sampling node is the maximum value between the input voltage of the input node and the output voltage of the output node. When the sampling voltage is greater than the input voltage, the reverse-connection protection module outputs the sampling voltage to the control terminal of the second power transistor, causing the second power transistor to turn off. When the sampling voltage is equal to the input voltage, a target voltage is output to the control terminal of the second power transistor based on the sampling voltage, causing the second power transistor to turn on. The target voltage is less than the sampling voltage. The drive module generates a drive signal to the control terminal of the first power transistor to realize the reverse-connection protection function of the circuit.

This utility model relates to the field of photovoltaic technology, specifically to a reverse connection protection structure for a photovoltaic module junction box. The structure includes a box body, an inner cavity connected to a reverse connection protection circuit, and through holes on the surface of the box body matching the cable. A top cover is connected to the top of the box body via a mounting structure. This design allows the operator to move a threaded cover on the cable surface to align with a threaded ring when connecting positive and negative cables to the reverse connection protection circuit. After alignment, rotating a threaded pin moves a fixing clamp downwards to secure the cable. Rotating the threaded cover connects it to the threaded ring. If the cable's polarity differs from the reverse connection protection circuit's polarity, the positioning block cannot enter the positioning groove. If the cable's polarity is the same, the positioning block enters the positioning groove, thus distinguishing the positive and negative terminals of the cable and providing reverse connection protection.

This utility model discloses an automatically adjustable DC inrush current suppression circuit, relating to the field of power electronics technology. The suppression circuit includes: an auxiliary module for connecting to a power supply and controlling the consistency during charging to prevent circuit damage caused by reverse connection; an RC network module for receiving circuit signals and dynamically adjusting the charging time constant based on the circuit signals to control the opening of a switch; a switch for limiting inrush current and ensuring normal power supply; a current detection module for detecting inrush current, converting it into a voltage signal, and providing feedback on the current level; the output terminal of the auxiliary module is connected to the input terminal of the RC network module, the output terminal of the RC network module is connected to the input terminal of the switch, and the output terminal of the switch is connected to the input terminal of the current detection module. This utility model ensures that the voltage of the MOSFET Q1 does not fluctuate due to changes in load current when it is turned on.

Provided in the present application are a communication apparatus and a communication method. The communication apparatus comprises a positive input end, a negative input end, a preceding-stage circuit apparatus and a post-stage circuit apparatus, wherein one end of the post-stage circuit apparatus is connected to an output end of the preceding-stage circuit apparatus, and the other end of the post-stage circuit apparatus is connected to the negative input end. The preceding-stage circuit apparatus comprises a controller and a switch apparatus, wherein the positive input end is connected to a first end of the switch apparatus, a second end of the switch apparatus is connected to the controller, and a third end of the switch apparatus is connected to a ground wire; and the controller is used for measuring a voltage difference between the first end and the third end of the switch apparatus, and controlling turning-on and turning-off of the switch apparatus on the basis of the voltage difference. On the basis of the above technical problem, the present application can solve the problem of a ground short circuit caused by reverse connection between RTN of a power distribution system and -48V of a communication apparatus, thereby preventing carbonization or burnout of components such as boards, cables and devices resulting from the ground short circuit.

This utility model relates to the field of DC input circuit technology, and more particularly to a DC multi-input reverse connection protection circuit, including at least two input channels. The positive terminal of each input channel is connected in parallel to a common positive node, and the negative terminal is connected to a common negative node through the drain of an N-MOS transistor. The source of the N-MOS transistor is connected to the negative terminal of the corresponding input channel. A voltage comparator has its input terminals connected to the positive and negative terminals of each input channel, and its output terminal connected to the gate of the corresponding N-MOS transistor. A controllable power supply module consists of a transistor, a Zener diode, a resistor, and a capacitor. Its input terminal is connected to the common positive node, and its output terminal provides voltage to the voltage comparator. The output terminal of the voltage comparator is connected to the gate of each N-MOS transistor to control the mutual exclusion conduction of the multiple input channels. This application improves the voltage drop and heat generation problems caused by using diodes and rectifier bridges to achieve reverse connection protection.

This application discloses a photovoltaic system, a direct-current combiner box, and a fault isolation method. The photovoltaic system includes a fault isolation circuit and a DC / DC conversion circuit. A first end of the fault isolation circuit is connected to N photovoltaic strings, and a second end of the fault isolation circuit is connected to an input end of the DC / DC conversion circuit. The fault isolation circuit includes a multipole switch, and each group of photovoltaic strings in the N photovoltaic strings is connected to an input end of a power conversion circuit through one pole of switch in the multipole switch. Each group of photovoltaic strings includes at least two photovoltaic strings. When a reverse connection fault occurs in the N photovoltaic strings, the entire multipole switch is turned off in linkage.

This application provides a DC filter component with negative voltage surge protection and reverse connection protection, relating to the field of electronic technology. It includes: a reverse connection protection circuit, a discharge circuit, a data acquisition and control circuit, and an input common-mode filter circuit. The reverse connection protection circuit includes a first NMOS transistor, whose drain is connected to the negative bus, its source is electrically connected to the first system ground, and its gate is electrically connected to the positive bus through a target resistor. The data acquisition and control circuit acquires the bus voltage and controls the first NMOS transistor to be turned off for a first preset time period when the bus voltage is less than or equal to a first preset voltage threshold. When the input power is lost, a group of capacitors is discharged through a first discharge resistor during the period when the bus voltage drops to a second preset voltage threshold, and a group of capacitors is discharged through a second discharge resistor during the period when the bus voltage drops from the second preset voltage threshold to a preset safe voltage value. Implementing the technical solution of this application improves the reliability of the DC filter component.

This invention relates to a high-voltage ideal diode controller circuit, comprising a controller chip and an external NMOS transistor. The chip integrates a bandgap reference source, an oscillator, a charge pump, a gate comparator, a fast pull-down comparator, a fast pull-down transistor, a clamping diode, and two 25mV reference sources. The gate comparator monitors the voltage difference between the input voltage VIN and the output voltage VOUT in real time, dynamically adjusting the gate voltage to turn on the NMOS transistor. Under light load conditions, the forward voltage difference is controlled at 25mV, significantly reducing power consumption. The fast pull-down comparator is triggered when VOUT is higher than VIN, quickly turning off the NMOS transistor within 500ns to prevent reverse current flow. The controller chip features soft-start, input reverse connection protection, and output clamping functions, with a simple external circuit. This invention is suitable for power supply main backup systems, achieving seamless switching and significantly reducing size and heat dissipation requirements.

The embodiment of the application relates to a signal transmission circuit, which comprises a plurality of connectors, a plurality of hardware modules connected in series through the plurality of connectors, each hardware module comprising an input port and an output port, a data transmission path being formed between the input port and the output port, and a transmission control circuit connected to the input port and the output port of each hardware module, wherein the transmission control circuit in a first hardware module is configured to control the data transmission path in the first hardware module to be turned on when a target signal is received, and the target signal is used to indicate that the connection relationship of the input port and / or the output port of the first hardware module is correct. The signal transmission circuit can correctly control the data transmission path to be turned on, and avoid data transmission failure caused by reverse connection of the hardware modules.

This utility model discloses a reverse connection protection circuit and a vehicle emergency starter power supply, relating to the field of power safety protection technology. It includes a positive clamp, a negative clamp, a coil, an N-level Hall sensor, and a S-level Hall sensor. The two ends of the coil are connected to the positive clamp and the negative clamp, respectively. Both the N-level and S-level Hall sensors are located within the magnetic field induction range of the coil. This utility model can determine the connection status of the positive and negative clamps based on the N-level and S-level Hall sensors, accurately determining whether the positive and negative clamps are connected correctly or incorrectly. This effectively prevents the emergency starter power supply from outputting power in reverse connection mode, greatly improving safety.

The application discloses a secondary power conversion circuit, which comprises a fuse protection module, a reverse connection prevention module, a surge suppression module, a filter module and a power conversion module which are electrically connected in sequence; the reverse connection prevention module is used for positive and negative direction conduction control of an input power supply; the fuse protection module is used for realizing fuse protection when the circuit overflows; the surge suppression module is used for suppressing power-on surge current and input surge voltage; the filter module is used for filtering electromagnetic interference in the circuit; and the power conversion module is used for converting primary power voltage into target secondary power voltage. The application can realize integrated protection of reverse connection prevention, overflow protection and surge suppression, and has high power supply stability.