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Parallel inverter system, wave-by-wave current limiting control method and interface board

A wave-by-wave current limiting and interface board technology, applied in the field of inverter control, can solve problems such as hardware overcurrent faults, and achieve the effect of avoiding hardware overcurrent faults

Active Publication Date: 2019-01-04
SUZHOU INOVANCE TECH CO LTD
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the hardware problem of other inverters caused by wave-by-wave current limiting of one inverter in the above-mentioned parallel inverter system. For the problem of overcurrent fault, provide a parallel inverter system, a wave-by-wave current limiting control method and an interface board

Method used

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] Such as figure 2 As shown, it is a schematic diagram of an embodiment of the parallel inverter system of the present invention. The above parallel inverter system can be used for motor control, and the output power can be increased through the parallel connection of inverters. The parallel inverter system of this embodiment includes a main controller 21, a parallel controller 22, three inverters 23, and three interface boards 24. In practical applications, the number of inverters 23 and interface boards 24 can be determined according to Adjustment is required.

[0026] Each of the aforeme...

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Abstract

The invention provides a parallel inverter system, a wave-by-wave current limiting control method and an interface board. The parallel inverter system comprises a plurality of inverters connected in parallel and a plurality of interface boards, and each inverter is connected with an interface board. The plurality of interface boards form a loop in series; Each of the interface boards outputs a wave-by-wave current-limiting trigger signal to the latter interface board when receiving a wave-by-wave current-limiting trigger signal of the inverter connected thereto or a wave-by-wave current-limiting trigger signal output from the previous interface board, and simultaneously blocks a driving signal of the inverter connected thereto. The invention can avoid the hardware overcurrent fault of other inverters caused by the wave-by-wave current limiting of one inverter in the parallel inverter system by connecting the interface board in series into a loop and synchronizing the wave-by-wave current limiting triggering signal through the loop.

Description

technical field [0001] The invention relates to the field of frequency converter control, and more specifically relates to a parallel inverter system, a wave-by-wave current limiting control method and an interface board. Background technique [0002] Parallel operation of inverters can realize large-capacity power supply, and can greatly improve the flexibility of the system, greatly reducing the volume and weight of the power supply system, and at the same time, the current stress of its main switching device can also be greatly reduced, thereby improving reliability and reducing costs and increase power density. [0003] Such as figure 1 Shown is a schematic diagram of the existing inverter parallel scheme. In the inverter parallel scheme, it includes a main controller 11 , a parallel controller 12 , multiple inverters 13 and multiple interface boards 14 , and each interface board 14 is connected to one inverter 13 as a whole. The above-mentioned parallel controller is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/40H02M1/092
CPCH02J3/40H02M1/092
Inventor 马元浩
Owner SUZHOU INOVANCE TECH CO LTD
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