Hot-pluggable high-voltage direct-current module capable of avoiding sparking

Abstract

The utility model relates to a high-voltage direct current module, in particular to a hot-pluggable high-voltage direct current module capable of avoiding sparking, which comprises a fixing unit connected with a bus and a plugging unit arranged on the fixing unit, and the fixing unit comprises a plugging shell and a conductive component arranged on the plugging shell. The plugging unit comprises a conversion assembly used for AC-DC power supply conversion and a butt joint assembly connected with the conversion assembly, when hot plugging of the high-voltage DC module is carried out, the butt joint assembly is firstly connected to the conductive assembly, when the long pin contacts the first port and the second port prior to the short pin, switches S1 and S2 in a circuit are switched on equivalently, and when the short pin contacts the first port and the second port, the hot plugging of the high-voltage DC module is realized. The pre-charging resistor R0 is arranged on the bus side, so that the bus side pre-charges the internal capacitor through the pre-charging resistor R0 until the internal capacitor and the bus side are equipotential, and then the short pin is in contact with the first port and the second port and is equivalent to closing of the switch S3 in the circuit, so that the impact current during power-on is reduced, and the sparking condition is avoided.

Description

Technical Field

[0001] This utility model relates to the field of high voltage DC module technology, specifically to a hot-swappable high voltage DC module that avoids arcing. Background Technology

[0002] High voltage DC modules are electronic devices that can convert alternating current (AC) to direct current (DC). They have a wide range of applications, such as power transmission, transportation, and power systems. Since high voltage DC modules are usually used in parallel with multiple modules, single module failures can occur in practical applications, requiring hot-swapping of the faulty module.

[0003] CN115208035A discloses a pre-charging circuit for a high-voltage DC system, including a transformer, a filter module, a rectifier module, a resistive-capacitive load, and a pre-charging module. The input terminal of the transformer is connected to a power supply. The output terminal of the transformer is connected to the input terminal of the rectifier module through the filter module. The output terminal of the rectifier module is connected to the resistive-capacitive load through the pre-charging module. The pre-charging module includes a control module, switches S5 and S6, a pre-charging resistor R4, and an RC module. The control module controls the on / off state of switches S5 and S6. The RC module and the branch of the pre-charging resistor R4 connected in series with switch S6 are connected in parallel with switch S5. This invention, by setting the control module, switches S5 and S6, pre-charging resistor R4, and RC module in the pre-charging module, ensures that the entire system is continuously pre-charged with current throughout the process. This solution is low-cost and solves the oscillation problem during contactor engagement, i.e., it avoids arcing during hot-plugging. However, it requires additional electronic components, resulting in higher costs, and the interference between circuits also needs to be considered.

[0004] To avoid arcing during hot-swapping while maintaining low cost, a hot-swappable high-voltage DC module that avoids arcing is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a hot-swappable high-voltage DC module that avoids arcing, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides a hot-swappable high-voltage DC module that avoids arcing, including a fixed unit connected to a busbar and a plug-in unit disposed on the fixed unit. The fixed unit includes a plug-in housing and a conductive component disposed on the plug-in housing. The plug-in unit includes a conversion component for AC-DC power conversion and a docking component connected to the conversion component.

[0007] When the conversion component is assembled with the plug-in housing, the docking component first contacts the conductive component to precharge the capacitor in the conversion component to avoid arcing.

[0008] As a further improvement to this technical solution, the conductive component includes a first port and a second port connected to the busbar, and the docking component includes a first plug and a second plug that are electrically connected to the conversion component. The first plug is electrically connected to the first port, and the second plug is electrically connected to the second port.

[0009] As a further improvement to this technical solution, both the first connector and the second connector are provided with a combination of long and short connector pins. The combination of long and short connector pins are provided with a pre-charging circuit for pre-charging the internal capacitor of the conversion component, and the two ends of the internal capacitor are also provided with a voltage display circuit for displaying the current voltage value.

[0010] As a further improvement to this technical solution, the long and short combination pins are multiple sets of two long and one short combination pins, and the short pins are equipped with fuses to prevent circuit overload.

[0011] As a further improvement to this technical solution, the pre-charging circuit includes switches S1, S2, and S3.

[0012] One end of the switch S1 is connected to the fuse FU and then to the switch S3. The fuse FU is connected to the bus side. The other end of the switch S1 is connected to the pre-charge resistor R0. The pre-charge resistor R0 is connected to the other end of the switch S3 and then to the internal capacitor.

[0013] One end of the switch S2 is connected to the bus side, and the other end of the switch S2 is connected to the other end of the internal capacitor.

[0014] As a further improvement to this technical solution, the voltage display circuit is a digital tube display circuit that displays the voltage across the internal capacitor in real time.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In this hot-swappable high-voltage DC module designed to prevent arcing, during hot-swapping of the high-voltage DC module, the docking component first connects to the conductive component. When the long pin contacts the first port and the second port before the short pin, it is equivalent to the switches S1 and S2 in the circuit closing. This allows the bus side to pre-charge the internal capacitor through the pre-charging resistor R0 until the internal capacitor is at the same potential as the bus side. Then, the short pin contacts the first port and the second port, which is equivalent to the switch S3 in the circuit closing. This reduces the inrush current when powered on and prevents arcing. Attached Figure Description

[0017] Figure 1 The existing interpolation equivalent circuit diagram;

[0018] Figure 2 This is an overall structural diagram of the present invention;

[0019] Figure 3 This is the equivalent circuit diagram of the long and short pin insertion of this utility model;

[0020] Figure 4 This is a pre-charging circuit diagram of the present invention. Detailed Implementation

[0021] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] Example 1

[0025] Please see Figures 1-4 As shown, this embodiment provides a hot-swappable high-voltage DC module that avoids arcing, including a fixed unit connected to the busbar and a plug-in unit disposed on the fixed unit. The fixed unit includes a plug-in housing and a conductive component disposed on the plug-in housing. The plug-in unit includes a conversion component for AC-DC power conversion and a docking component connected to the conversion component.

[0026] When the conversion component is assembled with the plug-in housing, the docking component first contacts the conductive component to precharge the capacitor in the conversion component to avoid arcing.

[0027] Principle: When hot-swapping a high-voltage DC module, the docking component is first connected to the conductive component. The conductive component pre-charges the capacitor in the conversion component through the docking component. When the voltage across the capacitor in the conversion component is at the same potential as the bus voltage, the conversion component is then fully connected to the plug-in housing, thereby avoiding arcing.

[0028] Furthermore, the conductive component includes a first port and a second port connected to the busbar, and the docking component includes a first connector and a second connector electrically connected to the conversion component. The first connector is electrically connected to the first port, and the second connector is electrically connected to the second port. The busbar inputs electrical energy to the conversion component through the electrically connected first connector and first port, and the conversion component outputs electrical energy to the busbar through the electrically connected second connector and second port.

[0029] Both the first and second connectors are equipped with long and short combination connectors. The long and short combination connectors are equipped with a pre-charging circuit for pre-charging the internal capacitor of the conversion component. The two ends of the internal capacitor are also equipped with a voltage display circuit for displaying the current voltage value.

[0030] The long and short combination connector consists of multiple sets of two long and one short connectors, and the short pin is equipped with a fuse to prevent circuit overload. The capacitor inside the conversion component is pre-charged by contacting the long pin. If the short pin contacts before the pre-charging process is completed, the fuse on the short pin will prevent circuit overload failure.

[0031] The pre-charge circuit includes switches S1, S2, and S3.

[0032] One end of switch S1 is connected to fuse FU and then to switch S3. Fuse FU is connected to the busbar side. The other end of switch S1 is connected to pre-charge resistor R0. Pre-charge resistor R0 is connected to the other end of switch S3 and then to an internal capacitor. Figure 4 The capacitor C0 in the middle;

[0033] One end of switch S2 is connected to the bus side, and the other end of switch S2 is connected to the other end of the internal capacitor.

[0034] The voltage display circuit is a digital tube display circuit that displays the voltage across the internal capacitor in real time.

[0035] When the long needle contacts the first port and the second port before the short needle, it is equivalent to the switches S1 and S2 in the circuit being closed, so that the bus side first precharges the internal capacitor through the pre-charging resistor R0 until the internal capacitor is at the same potential as the bus side. Then the short needle contacts the first port and the second port, which is equivalent to the switch S3 in the circuit being closed, thereby reducing the inrush current when powered on and avoiding arcing.

[0036] When the pre-charging circuit pre-charges the internal capacitor, the voltage display circuit allows observation of the voltage change of the internal capacitor through the digital tube display circuit. When the voltage of the internal capacitor rises to the same potential as the bus side, the short needle can be inserted into the first port and the second port.

[0037] This embodiment provides a hot-swappable high-voltage DC module that avoids arcing. In practical use, when hot-swapping the high-voltage DC module, the docking component first connects to the conductive component. When the long pin contacts the first port and the second port before the short pin, it is equivalent to the switches S1 and S2 in the circuit closing. This allows the bus side to pre-charge the internal capacitor through the pre-charging resistor R0 until the internal capacitor is at the same potential as the bus side. Then, the short pin contacts the first port and the second port, which is equivalent to the switch S3 in the circuit closing. This reduces the inrush current when powering on and avoids arcing.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hot-swappable high-voltage DC module that avoids arcing, characterized in that: It includes a fixed unit connected to the busbar and a plug-in unit disposed on the fixed unit. The fixed unit includes a plug-in housing and a conductive component disposed on the plug-in housing. The plug-in unit includes a conversion component for AC-DC power conversion and a docking component connected to the conversion component. When the conversion component is assembled with the plug-in housing, the docking component first contacts the conductive component to precharge the capacitor in the conversion component to avoid arcing. The conductive component includes a first port and a second port connected to the busbar, and the docking component includes a first plug and a second plug that are electrically connected to the conversion component. The first plug is electrically connected to the first port, and the second plug is electrically connected to the second port. Both the first and second connectors are provided with long and short combination connectors. The long and short combination connectors are provided with a pre-charging circuit for pre-charging the internal capacitor of the conversion component. The internal capacitor is also provided with a voltage display circuit for displaying the current voltage value at both ends. The pre-charging circuit includes switches S1, S2, and S3. One end of the switch S1 is connected to the fuse FU and then to the switch S3. The fuse FU is connected to the bus side. The other end of the switch S1 is connected to the pre-charge resistor R0. The pre-charge resistor R0 is connected to the other end of the switch S3 and then to the internal capacitor. One end of the switch S2 is connected to the bus side, and the other end of the switch S2 is connected to the other end of the internal capacitor.

2. The arc-avoiding hot-swappable high-voltage DC module according to claim 1, characterized in that: The long and short combination connector consists of multiple sets of two long and one short connectors, and the short connector is equipped with a fuse to prevent circuit overload.

3. The arc-avoiding hot-swappable high-voltage DC module according to claim 1, characterized in that: The voltage display circuit is a digital tube display circuit that displays the voltage across the internal capacitor in real time.

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