Solid-state circuit breaker and buffer absorption circuit used therefor
A technology of buffer absorption circuit and solid-state circuit breaker, which is applied in the direction of emergency protection circuit devices and electrical components, can solve the problems of damage to solid-state circuit breakers, high voltage of solid-state circuit breaker devices, and current cannot flow to capacitor C1 in time, so as to avoid being damaged damage, long off-time effects
Pending Publication Date: 2021-12-21
NO 711 RES INST CHINA SHIPPING HEAVY IND GRP
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Problems solved by technology
However, in this kind of snubber circuit, when the turn-off device is turned off, due to the existence of R1, the current on the loop cannot flow to the capacitor C1 in time, which will cause high voltage at both ends of the solid-state circuit breaker device, which will damage the solid-state circuit breaker. device
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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0030] see Figure 1 to Figure 4 . The present invention provides a snubber circuit 1000 for a solid state circuit breaker 2000. The buffer absorption circuit 1000 includes: a first buffer energy module 100 and a second buffer energy module 200; The module 100 is used to absorb the energy generated by turning off the turn-off device 15 within the first specific time of the specific time; the second buffer energy module 200 is used to absorb the energy generated d...
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The invention discloses a solid-state circuit breaker and a buffer absorption circuit used therefor. The buffer absorption circuit comprises a first buffer energy module and a second buffer energy module within a specific time after a turn-off device of the solid-state circuit breaker is turned off; the first buffer energy module is used for absorbing energy generated by the turn-off of the turn-off device within a first specific time of the specific time; and the second buffer energy module is used for having an enabling state in a second specific time of the specific time so as to absorb energy generated by the turn-off of the turn-off device, and the second specific time is later than the first specific time. The embodiment of the invention provides the solid-state circuit breaker and the buffer absorption circuit used therefor, aims to prevent a turn-off device from being damaged during turn-off and turn-on, and can be suitable for the condition of long turn-off time.
Description
technical field [0001] The invention relates to the field of power electronics, in particular to a solid-state circuit breaker and a buffer absorption circuit used therefor. Background technique [0002] During the turn-off process of a solid-state circuit breaker (such as a switching element such as a DC solid-state circuit breaker IGBT), due to the existence of line inductance, a high voltage will be generated at both ends of the solid-state circuit breaker device. This high voltage can easily damage solid state circuit breaker devices and therefore needs to be suppressed. [0003] In the prior art, a buffer snubber circuit is generally connected in parallel at both ends of the solid state circuit breaker device to suppress the high voltage. The snubber snubber circuit generally includes a snubber snubber circuit of a non-inductive capacitor and a non-inductive resistor. The snubber circuit connects the resistor R1 in series with the capacitor C1. In this way, when the ...
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IPC IPC(8): H02H7/20
CPCH02H7/205
Inventor 杨璇石伟缪光辉冯玉龙李骁赵德骥
Owner NO 711 RES INST CHINA SHIPPING HEAVY IND GRP