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Digital generator inverter

A digital generator and inverter technology, which is used in the control of generators, electrical components, and the conversion of AC power input to DC power output. The effect of low external environment requirements, fast response speed and improved reliability

Inactive Publication Date: 2009-06-17
周海英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patent uses a 32-bit processor to realize waveform feedback control, which also has the disadvantages of high requirements for the operating environment and complex peripheral circuits.
At the same time, because it controls multiple objects, the software is also very complicated and prone to errors

Method used

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  • Digital generator inverter
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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0015] like figure 1 As shown, the inverter of the digital generator of the present invention is composed of a controllable rectification circuit, a driving circuit, a signal generating circuit and a feedback circuit, the driving circuit is composed of a well-known H bridge, and the signal generating circuit is a signal generating chip, which has a The pulse width modulation (SPWM) generator can output sinusoidal pulse width modulation waveform, and the feedback circuit is composed of a highly reliable single-chip microcomputer with A / D conversion function and a feedback transformer. The microcontroller model is NXP935, which is an 8-bit microprocessor. The single-chip microcomputer and the signal generation chip are provided with working voltage by the auxiliary power supply, and the working power supply of the auxiliary power supply itself is 12V alternati...

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Abstract

The present invention discloses a digital electricity generator inverter, the AC output by the generator is transformed into DC through controllable rectification circuit. The DC is then outputs AC through H bridge drive circuit whose output end is connected with the input end of the feedback transformer whose output end is connected with the A / D converting input of a single chip whose data interface is connected with a signal generating chip. The signal generating chip produces corresponding pulse width to control H bridge drive circuit according to the differences of SPWM generated calculating and output waveform, thus, the modification of the waveform is realized. The present invention has the advantages of fast response, low requirement of environment of the signal generating chip, reduced system complexity and greatly improved reliability. The distortion factor of waveform of the inverter is less than 2 percents through experiment.

Description

technical field [0001] The invention relates to the technical field of digital generator inverters, in particular to a digital generator inverter used to control the output of a generator to become a sine wave voltage and to correct the output waveform. Background technique [0002] In recent years, mobile power supply devices, such as alternators driven by general-purpose gasoline engines, have largely used inverters. There are two ways to implement generator inverters, inverter and frequency conversion. At present, most of them adopt the "AC-DC-AC" circuit structure. The working principle of AC-DC-AC is: firstly, the three-phase AC power generated by the generator is converted by the rectifier. into direct current, and then through the inverter to convert the direct current into a sinusoidal alternating current output. Due to different load properties, the output will be distorted. In order to stabilize the output waveform and avoid distortion as much as possible, the gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/04H02M7/527
Inventor 周海英
Owner 周海英