The invention relates to a circuit arrangement (5) and an electrical system, in which in the circuit arrangement (5) an output connection (12) of a current limiting control circuit (10) is connected via a resistor (R) to a control input (22) of a semiconductor switch (20), and in which a gate driver (25) is connected via a gate resistor (RG) to the control input (22) of the semiconductor switch (20) and to the resistor (R). The current limiting control circuit (10) is designed to vary an output impedance of the current limiting control circuit at the output connection (12) in order to actuate the semiconductor switch (20). A source connection of the semiconductor switch (20) is connected to a reference potential (GND) of the circuit arrangement (5), and the semiconductor switch (20) is designed to set a current (I) in a circuit between the electrical energy source (30) and the load (40). The first inductor (L1) and the second inductor (L2) are connected in series in the circuit, and a first input connection (14) of the current limiting control circuit (10) is connected with a node between the inductors (L1, L2) through a capacitor (C). The current limiting control circuit (10) is designed to detect a recharge of the capacitor (C) caused by an overcurrent and, in response thereto, to increase the output impedance of the semiconductor switch (20), whereby the increased output impedance counteracts the overcurrent.
本发明涉及一种电路装置(5)和电气系统,其中,在电路装置(5)中,电流限制控制电路(10)的输出接头(12)通过电阻(R)与半导体开关(20)的控制输入端(22)连接,并且其中,栅极驱动器(25)通过栅极电阻(RG)与半导体开关(20)的控制输入端(22)并且与电阻(R)连接。电流限制控制电路(10)设置用于,改变在输出接头(12)处电流限制控制电路的输出阻抗,以便驱控半导体开关(20)。半导体开关(20)的源极接头与电路装置(5)的参考电位(GND)连接,并且半导体开关(20)设置用于,设定电气的能量源(30)和负载(40)之间的电路中的电流(I)。第一电感(L1)和第二电感(L2)在电路内串联,其中,电流限制控制电路(10)的第一输入接头(14)通过电容(C)与电感(L1、L2)之间的节点连接。电流限制控制电路(10)设置用于,识别电容(C)的由过电流引起的重新充电并且作为对此的反应提高半导体开关(20)的输出阻抗,因而提高的输出阻抗对抗过电流。
Circuit arrangement and electrical system for limiting current
用于限制电流的电路装置和电气系统
2023-11-14
Patent
Electronic Resource
Chinese
IPC: | H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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