Current-limiting hybrid power controller

Abstract

The invention belongs to the technical field of high-voltage power supply and particularly relates to a current-limiting hybrid power controller. The current-limiting hybrid power controller combines a current limiter and a hybrid switch. Under the condition of normal operation, the current limiter amounts to a lead, and the circuit is connected and disconnected by the hybrid switch composed of a solid-state switch and a mechanical switch in parallel. Under the condition of current surge in load short-circuit, capacitor electrifying and the like, the current limiter works at the current limit state, the circuit current is limited, a direct-current contact reliably cuts off load when in load short-circuit, the capacitor can be charged in a current limiting mode when being charged, and overhigh surge current or temperature rise of the solid-state switch is avoided.

Description

technical field [0001] The invention belongs to the technical field of high-voltage power supply, and in particular relates to a current-limiting hybrid power controller. Background technique [0002] With the electrification of vehicle DC power supply and distribution system and the improvement of the power of electrical equipment, the traditional power supply system can no longer meet the growing demand of vehicle power supply and distribution system. more and more attention. In the vehicle 900V high-voltage, DC, high-power power supply and distribution system, one of the core issues is the 900V power distribution device used in the high-voltage, DC, and high-power occasions on the vehicle. [0003] Traditional power distribution devices mostly use electromagnetic contactors as switching devices in the system, but the arcing problem of DC electromagnetic contactors has always been a key issue affecting their life and reliability. In solving the arc problem of the DC cont...

AI Technical Summary

Problems solved by technology

[0003] Traditional power distribution devices mostly use electromagnetic contactors as switching devices in the system, but the arc problem of DC electromagnetic contactors has always been a key issue affecting their life and reliability.

The hybrid switch makes full use of the excellent dynamic performance of the solid-state switch and the excellent static performance of the mechanical switch, which can effectively solve the arc problem of the mechanical switch. However, due to the long operation time of the mechanical switch, the hybrid switch still faces long protection time and circuit The defect of large current impact; in addition, for a large number of capacitors in the DC system, there is a large inrush current at the moment of power-on, although the solid-state switch can suppress the capacitor inrush current by controlling the slow change of the load voltage. However, in high-voltage and high-power applications, the power consumption and temperature rise of solid-state switches during the turn-on process greatly limit the application of hybrid switches.

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