DC-AC converter device and its parallel current sharing control method

A converter device, DC and AC technology, applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve the problems of different output voltages, uneven parallel currents, etc.

Active Publication Date: 2020-12-08
GOOD WILL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to the existing technology, the parallel connection technology of power converters for AC power supplies has the problems of different output voltages and uneven parallel currents, and it is still necessary to propose more solutions

Method used

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  • DC-AC converter device and its parallel current sharing control method
  • DC-AC converter device and its parallel current sharing control method
  • DC-AC converter device and its parallel current sharing control method

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Embodiment Construction

[0039] In the following, the technical means adopted by the present invention to achieve the intended purpose of the invention will be further described in conjunction with the accompanying drawings and preferred embodiments of the present invention.

[0040] For preferred embodiments of the present invention, please refer to figure 1 As shown, it includes a first DC-to-DC converter 11, a first full-bridge converter 12, a first sensor 13, a second DC-to-DC converter 21, a second full-bridge converter Inverter 22, a second sensor 23 and a microprocessor 30; wherein, the first DC-to-DC converter 11 is connected to the first full-bridge converter 12, and the first full-bridge converter 12 has two power supply output terminals, and the first sensor 13 is set on the power supply output terminal of the first full bridge converter 12 to sense the AC current signal output by the first full bridge converter 12 ; In this preferred embodiment, the first DC-to-DC converter 11 includes mo...

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Abstract

The invention discloses a direct current-alternating current conversion device and a parallel connection current-sharing control method thereof. The device comprises a first DC-to-DC converter, a second DC-to-DC converter, a first full-bridge converter, a second full-bridge converter, a first sensor, a second sensor and a microprocessor. The first DC-DC converter is connected with and controls thefirst full-bridge converter. The second DC-DC converter is connected with and controls the second full-bridge converter. the first sensor and the second sensor are respectively arranged at the powersupply output ends of the first full-bridge converter and the second full-bridge converter. The microprocessor is connected with the second DC-DC converter, the first sensor and the second sensor andreceives the output signals provided by the first sensor and the second sensor. When multiple output signals are not equal, the pulse width modulation signals are used for controlling and adjusting the output direct-current power supply signals, so that the purpose of current sharing of the output current after parallel connection can be achieved.

Description

technical field [0001] The present invention relates to a DC / AC converter, in particular to a DC / AC converter used in an AC power supply and a parallel current sharing control method thereof. Background technique [0002] In the parallel connection technology of power converters of traditional AC power supplies, an input circuit usually receives a set of input signals and a set of triangular carrier signals. The input circuit includes two identical amplifier circuits and is connected through two amplifier circuits. Two DC-to-DC converters are connected to two full-bridge converters to output two AC signals at a time, but the output voltages are different due to the different magnitudes of the carrier signals, and the two full-bridge converters are connected in parallel Afterwards, the problem of uneven current occurs. [0003] According to the prior art, the parallel connection technology of the power converters of the AC power supply has the problems of different output vo...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H02M7/493H02M7/5387
CPCH02M7/493H02M7/53871
Inventor林凯民
OwnerGOOD WILL INSTR