Single HF power conversion and dynamically pre-loaded sinusoidal inverter circuit

A technology of inverter circuit and conversion circuit, which is applied in the direction of converting AC power input into DC power output, output power conversion device, irreversible DC power input into AC power output, etc., which can solve the problem of large switching loss and low reliability sexual issues

Inactive Publication Date: 2002-10-16
武汉普天电源有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the circuit has undergone two high-frequency transformations, the switchi

Method used

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  • Single HF power conversion and dynamically pre-loaded sinusoidal inverter circuit
  • Single HF power conversion and dynamically pre-loaded sinusoidal inverter circuit

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Embodiment Construction

[0018] see figure 1 , the present invention includes a DC / DC conversion circuit 2, a dynamic preload circuit 3, and an inverter bridge circuit 4. The DC power supply 1 provides an input DC power supply to the DC / DC conversion circuit 2, and the single-chip microcomputer circuit constitutes an inverter signal circuit to generate a high-precision semi- The sine wave reference signal performs high-frequency switching control on the DC / DC conversion circuit 2, the output of the DC / DC conversion circuit 2 is connected to the dynamic load circuit 3 and the inverter bridge circuit 4, and the output terminal of the inverter bridge circuit 4 is connected to the AC through the filter circuit 5 Load 6. The DC / DC conversion circuit 2 is a single-ended forward converter, the primary switching device V1 is a high-power MOSFET, the transformer T1 is a high-frequency power transformer, and the rectifiers V3 and V4 are fast recovery diodes. The dynamic preload circuit 3 is composed of a high-...

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Abstract

The sinusoidal inverter circuit includes DC/DC converter circuit, dynamic pre-loading circuit, inverting bridge circuit, DC power source to provide input DC voltage to the DC/DC converter circuit, monochip computer circuit to generate high-precision semi-sinusoidal reference signal for the high-frequency switching control of the DC/DC converter circuit. The output of the DC/DC converter circuit is connected to the dynamic load circuit and the inverting bridge circuit, and the output of the inverting bridge circuit of connected to the AC load via a filter circuit. There is only one high frequency conversion in the whole conversion, and this results in low switch loss and high conversion efficiency.

Description

technical field [0001] The invention relates to a sine wave inverter circuit. Background technique [0002] At present, the working process of the general high-frequency conversion inverter circuit is as follows: the DC power is converted into the required DC voltage by the high-frequency DC / DC conversion circuit, and then the high-frequency modulation by the inverter bridge is output as a sine wave. The amplitude, frequency and phase of the AC output voltage are all determined by the inverter bridge conversion circuit. Because the circuit has undergone two high-frequency conversions, the switching loss is relatively large, which also reduces reliability to a certain extent. Contents of the invention [0003] In view of the above reasons, the purpose of the present invention is to provide a single high-frequency power conversion with dynamic preload sine wave inverter circuit which only undergoes one high-frequency conversion in the inverter process and reduces switching ...

Claims

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Application Information

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IPC IPC(8): H02M7/501
Inventor 姚继忠
Owner 武汉普天电源有限公司
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