Arc-free socket circuit for household direct-current power distribution system
By embedding MOSFETs and diodes within the DC socket, and utilizing NMOS and PMOS transistors to achieve arc-free operation, the problems of short socket lifespan and low safety are solved, thereby improving the socket's safety and reliability.
Patent Information
- Application Number
- CN202520297188.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Existing DC sockets have a limited lifespan due to arc discharge and pose risks of fire and electric shock. The use of complex mechanical structures reduces their availability.
The system employs MOSFETs and diodes embedded in an arc-free socket, utilizing NMOS and PMOS transistors for DC load and power supply operation respectively. Gate voltage is distributed through resistors to achieve arc-free operation. Safety is enhanced by combining protection circuits and a small step-down circuit.
Extend the lifespan of sockets, avoid the risk of fire and electric shock caused by electric arcs, enhance safety performance, and reduce the risk of equipment damage.
Smart Images
Figure CN223757803U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an arcless socket circuit technical field, especially a kind of for domestic direct current distribution system arcless socket circuit. BACKGROUND
[0002] Direct current distribution system has been applied in many places, such as direct current data center, direct current building, electric vehicle charging station etc. Many researchers are also studying how to improve the function of direct current micro-grid system, for example, plug and play of direct current micro-grid system. In all the above applications, plug and socket for direct current system need to be realized and developed. The current direct current socket generally exists because of arc discharge, and the service life of its plug is only about 1000 cycles, that is, the life is limited. Some people design to use complex sealing mechanical structure and permanent magnet to reduce arc, but additional mechanical operation needs to be inserted and pulled out, which reduces the availability of direct current socket. SUMMARY
[0003] The utility model aims at solving the technical problem proposed in the above background art.
[0004] The utility model adopts the following technical scheme: a kind of for domestic direct current distribution system arcless socket circuit, including MOSFET and diode, the MOSFET and diode are embedded in arcless socket interior.
[0005] Preferably, the diode connected in parallel from negative to positive is used to provide a current path.
[0006] Preferably, the circuit distributes gate voltage from direct current bus to MOSFET through two resistors.
[0007] Preferably, the arcless socket circuit is based on NMOS tube and PMOS tube respectively, the NMOS tube is used for direct current load, and the PMOS tube is used for direct current power supply work.
[0008] Compared with prior art, the utility model has the advantages and positive effects that:
[0009] In the utility model, the service life of socket is improved, and the problems of fire, electric shock caused by arc are avoided, the safety performance of socket use is improved, and the risk of equipment damage is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0010] Fig. 1 A direct current arcless safety socket application scenario for the arcless socket circuit of direct current distribution system for domestic use is proposed in the utility model;
[0011] Fig. 2The utility model provides a direct current arcless socket circuit diagram for the direct current distribution system arcless socket circuit for household. DETAILED DESCRIPTION
[0012] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model is further described below in combination with drawings and examples. It should be explained that the examples and features in the examples of the present application can be combined with each other without conflict.
[0013] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the utility model, however, the utility model can also be implemented in other ways different from the description herein, therefore, the utility model is not limited to the specific examples disclosed in the following description.
[0014] EMBODIMENT
[0015] Please refer to Figs. 1-2 The utility model provides a technical scheme: a direct current distribution system arcless socket circuit for household, including MOSFET and diode, MOSFET and diode are embedded in the inside of arcless socket, the diode from negative to positive parallel is used to provide current path, the circuit is through two resistors and distributes the gate voltage from direct current bus to MOSFET, the arcless socket circuit is based on NMOS tube and PMOS tube respectively, NMOS tube is used for direct current load, and PMOS tube is used for direct current power supply work, as shown in Fig. 2 The ground wire is not drawn in the drawing. Because the current of direct current load and the current of 380V direct current bus are different, two feasible direct current arcless safety sockets are provided in practical application.
[0016] One MOS tube can not be used for direct current load and direct current power supply simultaneously. Because body diode is naturally conducted in one kind of condition. Therefore, the arcless safety socket based on NMOS tube ( Fig. 2 Left) is used for direct current load, and the arcless safety socket of PMOS tube ( Fig. 2 Right) is used for direct current power supply work, and MOSFET is used for closing the circuit after the metal connector is inserted and opening the circuit before the metal connector is completely pulled out, so as to avoid the electric arc between metal parts. Solid state device replaces metal connector to close and open the circuit, realizes completely arcless operation, and is safe.
[0017] A simple drive circuit requires only two resistors to distribute the gate voltage from the DC bus to the MOSFET. Due to the nature of the MOSFET, its power consumption is very small. An optional protection circuit is also designed to short the gate voltage to achieve over-current and over-temperature protection functions. A 1W small step-down circuit is used to power the optional protection circuit. Other circuits with IC and MOSFET are also designed, but are ignored in the figure.
[0018] Diodes in parallel from negative to positive are used to provide a current path and avoid overvoltage when the MOSFET opens the circuit with inductive elements, otherwise it will damage the MOSFET. Simulation results show that it works well.
[0019] Small chokes in series are used to suppress the inrush current when the MOSFET closes the circuit with capacitive load. The value and volume are selected to take into account the 500A inrush current peak, which is relatively severe, and is rarely seen in residential loads.
[0020] The above is only the preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments made in accordance with the technical essence of the present application without departing from the technical scheme of the present application shall still fall within the protection scope of the present application.
Claims
1. An arcless outlet circuit for a direct current power distribution system for home use, comprising a MOSFET and a diode, characterized by: The MOSFET and diode are embedded inside an arcless socket.
2. The no-arc outlet circuit for a direct current electrical power distribution system for home use of claim 1, wherein: The diode from negative to positive in parallel is used to provide a current path.
3. The no-arc outlet circuit for a direct current electrical power distribution system for home use of claim 1, wherein: The circuit distributes gate voltage from a DC bus to the MOSFET through two resistors.
4. The no-arc outlet circuit for a direct current electrical power distribution system for home use of claim 1, wherein: The arcless socket circuit is based on NMOS and PMOS tubes respectively, the NMOS tube is used for DC load, and the PMOS tube is used for DC power work.