阅读说明：本技术 灭弧电路及装置 (Arc extinguishing circuit and device ) 是由 郭桥石 于 2019-09-18 设计创作，主要内容包括：一种灭弧电路及装置,特别是一种适合于对机械开关灭弧的灭弧电路及装置,所需灭弧的机械开关(K)与负载(RL)串联组成第一串联电路,其包括第一开关(S1)、第一充电单元(U1)、第一电容(C1)；第一电源通过第一充电单元(U1)对第一电容(C1)充电,机械开关(K)分断过程中,第二电源通过第一开关(S1)、第一电容(C1)对负载(RL)供电；第一充电单元(U1)为第一元件,或为第二开关,或由第一元件与第二开关串联组成。该灭弧电路及装置具有电容容量利用率高,电路简单的优点。(An arc extinguishing circuit and device, especially suitable for the arc extinguishing circuit and device to mechanical switch arc extinguishing, the mechanical switch (K) that needs arc extinguishing connects in series with load (RL) and makes up the first series circuit, it includes the first switch (S1), the first charging unit (U1), the first electric capacity (C1); the first power supply charges a first capacitor (C1) through a first charging unit (U1), and the second power supply supplies power to a load (RL) through a first switch (S1) and a first capacitor (C1) in the breaking process of a mechanical switch (K); the first charging unit (U1) is a first element, or a second switch, or is composed of the first element and the second switch in series. The arc extinguishing circuit and the arc extinguishing device have the advantages of high capacity utilization rate of the capacitor and simple circuit.)

The utility model provides an arc extinguishing circuit, the mechanical switch that needs the arc extinguishing constitutes first series circuit with load series connection, characterized by: the charging circuit comprises a first switch, a first charging unit and a first capacitor;

a first power supply charges the first capacitor through the first charging unit, and a second power supply supplies power to the load through the first switch and the first capacitor in the breaking process of the mechanical switch;

the first charging unit comprises a first element, or is a second switch, or consists of the first element and the second switch which are connected in series.

The arc quenching circuit of claim 1, wherein: the first power source is provided by a power source connected to the first series circuit.

The arc quenching circuit of claim 1, wherein: the first switch and the second switch are semiconductor switches.

The arc quenching circuit of claim 1, wherein: the second switch is used for adjusting the charging voltage of the first capacitor.

The arc quenching circuit of claim 1, wherein: the mechanical switch is connected in series with a one-way conduction device, and the one-way conduction device is connected in parallel with a bypass switch.

The arc quenching circuit of claim 1, wherein: the first capacitor is discharged through the first element and the second switch.

The arc quenching circuit of claim 1, wherein: the first power source is provided across the load and the second power source is provided by a power source connected across the first series circuit.

An arc quenching circuit according to any of claims 1 to 5, characterized in that: the first capacitor is connected with the first switch, the second capacitor is connected with the second switch, and the third switch, the first switch and the second switch form a third series circuit; the first switch, the first capacitor and the fourth switch form a second series circuit, and in the breaking process of the mechanical switch, the second power supply supplies power to the load through the second series circuit; the number of the mechanical switches, the load and the fourth switches is one, two or more.

The arc quenching circuit of claim 8, wherein: the first power supply and the second power supply are provided by power supplies connected to two ends of the first series circuit.

The arc quenching circuit of claim 8, wherein: and the third switch and the fourth switch form a fourth series circuit, before or in the closing process of the mechanical switch, the second power supply supplies power to the load through the fourth series circuit, and the third switch or the second element is connected in series.

The arc quenching circuit of claim 8, wherein: the first capacitor discharges the circuit through the first diode and the third switch; or the first capacitor is discharged through the second switch and the first diode.

The arc quenching circuit of claim 8, wherein: the third switch is a full-control switch or a semi-control switch; the fourth switch is a semi-controlled switch.

The arc quenching circuit of claim 8, wherein: the fourth switch is a semiconductor switch.

The arc quenching circuit of claim 13, wherein: the fourth switch is connected with at least one diode in series.

The arc quenching circuit according to any of claims 1 to 6, characterized in that: the power supply further comprises a second capacitor, and the second power supply is provided by the second capacitor.

The arc quenching circuit of claim 15, wherein: the first power source is provided by both ends of the load or by a power source connected across the first series circuit.

The arc quenching circuit of claim 15, wherein: the second charging unit is used for charging the second capacitor, and is a second element, or a seventh switch, or is formed by connecting the second element and the seventh switch in series.

The arc quenching circuit of claim 17, wherein: the first capacitor is connected with the first switch, the second capacitor is connected with the second switch, and the third switch, the first switch and the second switch form a third series circuit; the first power supply is used for charging the second capacitor through the third switch and the second charging unit, the first switch, the first capacitor and the fourth switch form a second series circuit, in the breaking process of the mechanical switch, the second power supply is used for supplying power to the load through the second series circuit, and the number of the mechanical switch, the load and the fourth switch is one, two or more.

The arc quenching circuit of claim 18, wherein: the third series circuit further comprises a second element through which the first power supply is connected to the third switch, the common terminal of the second element and the third switch being connected to a fourth capacitance.

The arc quenching circuit of claim 18, wherein: the third series circuit also comprises a third element, and the second switch is a non-control switch or a semi-control switch; the first power source charges the second capacitor through the third element, the third switch, the second element and the seventh switch; the first power source charges the first capacitor through the eighth series circuit; the seventh switch is a non-controllable switch or a controllable switch.

The arc quenching circuit of claim 20, wherein: the capacity of the second capacitor is larger than that of the first capacitor, and the second capacitor is connected with the first voltage stabilizing device in parallel; or the capacity of the first capacitor is larger than that of the second capacitor, and the first capacitor is connected with the first voltage stabilizing device in parallel.

The arc quenching circuit of claim 20, wherein: the first power supply charges the second capacitor through the third series circuit.

The arc quenching circuit of claim 20, wherein: the third series circuit further comprises a third element through which the first power source is connected to the third switch, and a common terminal of the third element and the third switch is connected to a fourth capacitor.

An arc extinguishing device comprising an arc extinguishing circuit according to any of claims 1 to 6, characterized in that: the control unit is used for providing control signals of the first switch and the second switch.

The arc extinguishing device of claim 24, wherein: the control unit is used for detecting the charging voltage of the first capacitor.

The arc extinguishing device of claim 24, wherein: and voltage signals at two ends of the mechanical switch are transmitted to the control unit, or signals of an auxiliary switch of the mechanical switch are transmitted to the control unit.

An arc extinguishing device according to claim 24, characterized in that: it is placed in a housing and connected to the mechanical switch through terminals.

An arc extinguishing device including the arc extinguishing circuit of any one of claim 8, characterized in that: the control unit is used for providing control signals of the first switch, the second switch and the third switch; the control signal of the fourth switch is provided by the control unit, or the control electrode of the fourth switch is connected with the load ground through a capacitor, or the control electrode of the fourth switch is connected with the input end of the mechanical switch through a capacitor.

An arc extinguishing device according to claim 28, wherein: and the voltage signal of the first capacitor is transmitted to the control unit.

An arc extinguishing device according to claim 28, wherein: and a voltage signal of a power supply at the input end of the mechanical switch is connected to the control unit.

An arc extinguishing device according to claim 28, wherein: and a voltage signal of a common end of the mechanical switch and the load is transmitted to the control unit.

An arc extinguishing device according to claim 28, wherein: the control signal of the mechanical switch is transmitted to the control unit, or the control unit provides the control signal of the mechanical switch, or the auxiliary switch signal of the mechanical switch is transmitted to the control unit.

An arc extinguishing device according to claim 28, wherein: the control unit adjusts the charging voltage of the first capacitor according to the current passing through the mechanical switch.

An arc extinguishing device according to claim 28, wherein: the control unit is used for controlling the first switch to be switched on and off, and the first switch, the second switch and the third capacitor are connected in series; and the sixth switch, the third capacitor and the fourth switch form a sixth series circuit, in the breaking process of the mechanical switch, the second power supply supplies power to the load through the sixth series circuit, and the fifth switch is a diode or a controllable switch provided by the control unit for a control signal.

An arc extinguishing device according to claim 28, wherein: the power supply of the input end of the mechanical switch is connected with the common end of the eighth switch and the fourth switch through the sixth element, and a voltage signal of the common end is transmitted to the control unit.

An arc extinguishing device according to claim 28, wherein: it is placed in a housing and connected to the mechanical switch through terminals.

An arc extinguishing device including the arc extinguishing circuit of any one of claim 18, characterized in that: the control unit is used for providing control signals of the first switch, the second switch and the third switch; the control signal of the fourth switch is provided by the control unit, or the control electrode of the fourth switch is connected with the load ground through a capacitor, or the control electrode of the fourth switch is connected with the input end of the mechanical switch through a capacitor, and the number of the mechanical switch, the load and the fourth switch is one, two or more.

An arc extinguishing device according to claim 37, characterized in that: and the voltage signal of the first capacitor is transmitted to the control unit.

An arc extinguishing device according to claim 37, characterized in that: and a voltage signal of a power supply at the input end of the mechanical switch is connected to the control unit.

An arc extinguishing device according to claim 37, characterized in that: and a voltage signal of a common end of the mechanical switch and the load is transmitted to the control unit.

An arc extinguishing device according to claim 37, characterized in that: the control signal of the mechanical switch is transmitted to the control unit, or the control unit provides the control signal of the mechanical switch, or the auxiliary switch signal of the mechanical switch is transmitted to the control unit.

An arc extinguishing device according to claim 37, characterized in that: the control unit adjusts the charging voltage of the first capacitor according to the current passing through the mechanical switch.

An arc extinguishing device according to claim 37, characterized in that: the power supply of the input end of the mechanical switch is connected with the common end of the eighth switch and the fourth switch through the sixth element, and a voltage signal of the common end is transmitted to the control unit.

An arc extinguishing device according to claim 37, characterized in that: the switch circuit further comprises a ninth switch, a series circuit formed by the first capacitor and the ninth switch is connected with the fourth switch, and a voltage signal at the common end of the series circuit and the fourth switch is transmitted to the control unit.

An arc extinguishing device according to claim 37, characterized in that: it is placed in a housing and connected to the mechanical switch through terminals.

An arc quenching device including the arc quenching circuit of claim 15, characterized in that: the first power supply is provided by two ends of the load, the first power supply further comprises a second charging unit, the first power supply is used for charging the first capacitor through the first element, the first power supply is used for charging the second capacitor through the second charging unit, the first capacitor is connected with a voltage stabilizing device or a resistor in parallel, the first switch is a voltage detection switch, and the voltage detection switch is used for detecting the potential difference or the voltage change rate between the first capacitor and the second capacitor or is used for detecting the voltage reduction rate at two ends of the load.

An arc extinguishing device according to claim 46, wherein: the first capacitor, the second charging unit and the second capacitor form a tenth series circuit, and the first power supply charges the first capacitor and the second capacitor through the tenth series circuit.

An arc extinguishing device according to claim 46, wherein: the first capacitor, the third charging unit and the second capacitor form a tenth series circuit, and the first power supply charges the first capacitor and the second capacitor through the tenth series circuit; the third charging unit is formed by connecting a third diode and a third element in series; or a third element; or a third diode.

An arc extinguishing device according to claim 46, wherein: the third charging unit is formed by connecting a second diode and a second element in series; or a second element; or a second diode.

An arc extinguishing device according to claim 46, wherein: the capacity of the first capacitor is larger than that of the second capacitor, and the first capacitor is connected with the first voltage stabilizing device in parallel; or the capacity of the second capacitor is larger than that of the first capacitor, and the second capacitor is connected with the first voltage stabilizing device in parallel.

An arc extinguishing device according to claim 46, wherein: the first switch is composed of a fifth diode, a second voltage stabilizing device and a first semi-controlled device, and the second capacitor triggers the first semi-controlled device to be conducted through the second voltage stabilizing device and the fifth diode.

An arc extinguishing device according to claim 46, wherein: the first switch comprises a third capacitor, and the third capacitor is used for inputting a voltage signal.

An arc extinguishing device according to claim 52, wherein: the first switch consists of the third capacitor and a first semi-control device; the second capacitor triggers the first semi-controlled device to be conducted through the third capacitor, or the voltage of the load triggers the first semi-controlled device to be conducted through the third capacitor.

An arc extinguishing device according to claim 52, wherein: the first switch is composed of the third capacitor, a first semi-controlled device and a delay unit, the voltage signal is transmitted to the delay unit through the third capacitor, and the delay unit drives the first semi-controlled device to be conducted.

An arc extinguishing device according to claim 54, wherein: the delay unit is composed of a power supply circuit, a delay circuit and a semi-controlled switch circuit, the power supply circuit is composed of a fourth element and a third voltage stabilizing device, a working power supply provided by the second capacitor is limited in current through the fourth element, and the third voltage stabilizing device stabilizes voltage to provide working energy for the delay circuit.

An arc extinguishing device according to claim 46, wherein: the power supply of the voltage detection switch is provided by the voltage between the first capacitor and the second capacitor, or is provided by the voltage across the load in a non-isolated mode.

An arc extinguishing device according to claim 46, wherein: and the voltage input end and the output end of the voltage detection switch are not electrically isolated.

An arc extinguishing device according to claim 46, wherein: which is encapsulated as a device using an insulating material.

An arc extinguishing device according to any one of claims 24, 28, 37 and 46, wherein: the control unit also includes a communication port.