3results about How to "Accelerated shutdown" patented technology

This invention discloses an automatic switching system, method, and drive circuit for an uninterruptible power supply (UPS) in the field of power electronics. It includes a power module for providing electrical energy to the system; a relay switch unit for controlling the switching of mains power input; an accelerated turn-off unit for accelerating the turn-off of the relay switch unit; a circuit switching unit for switching a high-current drive circuit to a low-current drive circuit after a predetermined delay; and a control module for outputting a high-level signal to control the circuit switching unit to switch the high-current drive circuit to accelerate the closing of the relay switch unit, and outputting a low-level signal to control the accelerated turn-off unit to accelerate the turn-off of the relay switch unit. This invention employs a delayed switching drive design and an accelerated turn-off unit, which significantly simplifies the power supply hardware design, reduces the power requirements of the auxiliary power module, and significantly shortens the relay turn-off time, ensuring the stability and reliability of the UPS during the switching process.

The embodiment of the invention discloses an optocoupler isolation circuit. The optocoupler isolation circuit comprises an optocoupler, a first resistor-capacitor module, a first switch module, a diode module, a second resistor-capacitor module and a second switch module. The first input end of the optocoupler is electrically connected with the first end of the first resistance-capacitance module, and the second end of the first resistance-capacitance module is electrically connected with the first power supply; the first end of the first switch module is electrically connected with the first output end of the optocoupler, and the control end of the first switch module serves as the input end of the optocoupler isolation circuit. The first end of the second resistor-capacitor module is electrically connected with the second input end of the optocoupler, the second end of the second resistor-capacitor module is electrically connected with the control end of the second switch module, the first end of the second switch module is electrically connected with the second power supply, and the second end of the second switch module serves as the output end of the optocoupler isolation circuit. According to the optocoupler isolation circuit provided by the embodiment of the invention, the switching frequency of the optocoupler can be improved.

The invention belongs to the technical field of semiconductors, and particularly discloses a reverse current source based on RBDT, a direct-current circuit breaker, circuit breaking equipment and a control method. According to the invention, the carrier lifetime of the device RBDT is short, so that the device can be turned off by reducing the time of applying reverse voltage to the two ends of the RBDT, thereby achieving the purpose of quick turn-off. The resonant capacitor in the reverse current source based on the RBDT can be directly charged by a direct current system, an external power supply does not need to be additionally added for charging, and the RBDT direct current circuit breaker topological structure for charging the resonant capacitor can be realized only by the direct current system, so that the function of automatic reclosing can be realized after the fault current of the RBDT is cut off.