Sine wave inverter with switchable output voltages

A technology of output voltage and inverter, which is applied in the direction of output power conversion device, adjustment of electric variable, conversion of DC power input to DC power output, etc., which can solve problems such as poor safety and reliability, low conversion efficiency, and single output mode

Inactive Publication Date: 2015-01-21
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a sine wave inverter with switchable output voltage to overcome the shortcomings of traditional inverters such as single output mode, low conversion efficiency, and poor safety and reliability.

Method used

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  • Sine wave inverter with switchable output voltages
  • Sine wave inverter with switchable output voltages
  • Sine wave inverter with switchable output voltages

Examples

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Embodiment Construction

[0030] The present invention is further analyzed below in conjunction with accompanying drawing.

[0031] Such as figure 1 As shown, the present invention includes a push-pull boost main circuit (1), a full-bridge inverter main circuit (2), a front-stage drive protection circuit (3), and a rear-stage drive protection circuit (4); the output terminal of the 24V storage battery is connected to the One input end of the push-pull boost main circuit (1) is electrically connected, one output end of the push-pull boost main circuit (1) is signal-connected to the input end of the pre-stage drive protection circuit (3), and the pre-stage drive protection circuit ( 3) The output terminal of the push-pull boost main circuit (1) is signal-connected to the other input terminal, and the other output terminal of the push-pull boost main circuit (1) is connected to an input terminal of the post-stage drive protection circuit (4) Signal connection, another output terminal of the push-pull boo...

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PUM

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Abstract

The invention relates to a sine wave inverter with switchable output voltages. The sine wave inverter comprises a push-pull boosting main circuit, a full bridge inversion main circuit, a fore-level drive protecting circuit and a back-level drive protecting circuit. A 24-volt storage battery is electrically connected with the push-pull boosting main circuit. The push-pull boosting main circuit is in signal connection with the fore-level drive protecting circuit, the back-level drive protecting circuit and the full bridge inversion main circuit. The full bridge inversion main circuit is in signal connection with the back-level drive protecting circuit. When the 24-volt storage battery is connected to the inverter, two kinds of different amplitudes of alternating voltages can be output, and immediate switching of the two kinds of output voltages can be achieved through a switch. The output alternating voltages are pure sine waves, the harmonic content is small, the interference on the load is small, and the overall conversion efficiency can reach to more than 90 percent.

Description

technical field [0001] The invention belongs to the technical field of inverter power supplies, and in particular relates to a sine wave inverter with switchable output voltage. The input is connected to a 24V storage battery, and the output can be switched between AC 110V and 220V. Background technique [0002] With the rapid development of the photovoltaic industry, there are more and more types of inverters, and most of the independent inverters use the conversion structure of push-pull boost and full-bridge inverter. However, the inverters currently on the market can only output one voltage, and the output is mostly square wave or quasi-sine wave, which has low conversion efficiency and great load interference; and lacks battery reverse connection, undervoltage, overvoltage protection and system Measures such as over-temperature, over-heat protection, load over-current, and short-circuit protection will lead to shortened service life of the battery, low system stability,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M3/337
CPCH02M3/3374H02M7/53871
Inventor 秦会斌刘丹龚三三
Owner HANGZHOU DIANZI UNIV
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