Inverter charging switch and inverter
A charging switch and inverter technology, applied in the field of rail transit, can solve the problems of slow closing and disconnecting of contactors and affecting the overall performance of the inverter, so as to enhance the overall performance, speed up charging and discharging, The effect of improving work efficiency
Active Publication Date: 2019-05-24
CRRC DALIAN R & D CO LTD
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Problems solved by technology
[0005] The invention provides an inverter charging switch and an inverter, which are used to solve the problem in the prior art that the closing and opening speed of the contactor is relatively slow, thereby affecting the overall performance of the inverter
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[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0019] figure 2 A circuit diagram of an inverter charging switch provided in Embodiment 1 of the present invention, as shown in figure 2 As shown, the inverter charging switch provided in this embodiment includes: a first IGBT11, a charging resistor 12 and a first IGBT drive circuit 13;
[0020] The first end of the charging resistor 12 i...
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The invention provides an inverter charging switch and an inverter. The inverter charging switch comprises a first IGBT, a charging resistor and a first IGBT drive circuit; the first end of the charging resistor is connected to the collector of the first IGBT; the second end of the charging resistor is connected to the emitter of the first IGBT; the collector of the first IGBT is connected to a contactor; the emitter of the first IGBT is connected to the input port of an inverter circuit in the inverter; the grid of the first IGBT is connected to the first IGBT drive circuit; the charging resistor is used for switching on a current path of the contactor and a supporting capacitor in the inverter circuit when the first IGBT is switched off; and the first IGBT drive circuit is used for controlling switching on and switching off the first IGBT. With the technical schemes provided by the invention adopted, charging and discharging of the support capacitor in the inverter circuit can be accelerated, so that overall performance of the inverter can be strengthened, and working efficiency of the inverter can be increased.
Description
technical field [0001] The invention relates to rail transit technology, in particular to an inverter charging switch and an inverter. Background technique [0002] With the continuous development of power electronics technology, rail vehicles are widely used in the fields of modern transportation and national defense. As an indispensable part of rail vehicles, inverters provide AC power for the normal running of rail vehicles. The inverter provides an inverter charging switch, and the inverter charging switch is arranged at the front end of the main circuit of the inverter. The current input into the main circuit of the inverter, through the charging switch of the inverter, charges the supporting capacitor of the inverter circuit in the main circuit of the inverter, so that the supporting capacitor keeps the voltage of the inverter circuit stable. [0003] In the prior art, parallel contactors are used as the inverter charging switch. figure 1 A circuit diagram for an exi...
Claims
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IPC IPC(8): H02M7/537
Inventor 张涛俞彦军于跃付强
Owner CRRC DALIAN R & D CO LTD