Three-phase inverter power supply based on digital signal processor (DSP) control

A technology of three-phase inverters and single-phase inverters, which is applied in the direction of electrical components, output power conversion devices, and conversion of AC power input to DC power output. The effect of eliminating the dead zone effect, improving the output waveform, and improving the waveform quality

Inactive Publication Date: 2014-12-10
ZHEJIANG YONGSHENG NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The asymmetry of the phase also causes the asymmetry of the line voltage, which may cause adverse consequences to the load, so that some sensitive equipment cannot work normally.

Method used

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  • Three-phase inverter power supply based on digital signal processor (DSP) control
  • Three-phase inverter power supply based on digital signal processor (DSP) control
  • Three-phase inverter power supply based on digital signal processor (DSP) control

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Embodiment Construction

[0027] Such as Figure 1-2 As shown, a three-phase inverter power supply based on DSP control includes three mutually independent single-phase inverter modules 1, and a DSP control module 2 and a working module respectively connected to the three single-phase inverter modules 1. Frequency step-up transformer 3, wherein, the DSP control module 2 includes a DSP control chip 21, a DC voltage detection circuit 22 connected to the input end of the DSP control chip 21, an IGBT AC current detection circuit 23, an AC voltage detection circuit 24, and the DSP The isolated drive and protection circuit 25 and the sound and light alarm circuit 26 connected to the output end of the control chip 21, the DSP control module 2 further includes a RS485 communication circuit 27, which is used for the communication between the DSP control chip 21 and the upper computer, and the DC input voltage is input to The IGBT full-bridge inverter circuit of the single-phase inverter module 1, the SPWM signa...

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Abstract

The invention discloses a three-phase inverter power supply based on digital signal processor (DSP) control. The power supply comprises three independent single-phase inverter modules and a DSP control module and a power frequency boosting transformer which are connected with the three single-phase inverter module, wherein the DSP control module comprises a DSP control chip, a direct current voltage detection circuit, an insulated gate bipolar translator (IGBT) alternating current detection circuit, an alternating current voltage detection circuit, an isolation driving and protection circuit, a sound and light alarm circuit and a recommended standard (RS) 485 communication circuit. Direct current input voltage is input into an IGBT full bridge inversion circuit of the single-phase inverter module, SPWM signals output by the DSP control chip is utilized to drive full bridge inversion and invert direct current into alternating current, and the alternating current is converted into power frequency alternating current through a power frequency boosting transformer to be output. The three-phase inverter power supply adopting the structure has the advantages of being high in efficiency, good in stability and high in expandability and the like.

Description

technical field [0001] The invention relates to a three-phase off-grid inverter power supply, in particular to a DSP-based three-phase inverter power supply, which belongs to the technical field of new energy power generation system control. Background technique [0002] Solar photovoltaic power generation is an important part of the long-term energy strategy supported by multinational governments including my country, and has been widely used, and the inverter is an important part of the entire solar photovoltaic power generation system. Inverters are classified according to the number of output phases, and can be divided into single-phase inverters and three-phase inverters. Single-phase inverters can be divided into half-bridge inverters and full-bridge inverters according to their structure. Three-phase inverters can be divided into three-phase three-wire inverters and three-phase four-wire inverters. In actual application, choose single-phase inverter or three-phase i...

Claims

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Application Information

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IPC IPC(8): H02M7/5387
Inventor周巧玲鲍仁强王忠谈扬宁
OwnerZHEJIANG YONGSHENG NEW ENERGY TECH