Optimal carrier frequency-based design method of inverter

A technology of carrier frequency and design method, applied in the direction of output power conversion device, conversion of AC power input to DC power output, climate sustainability, etc., can solve the impact of not considering the overall efficiency of carrier frequency and output harmonic distortion at the same time And other issues

Active Publication Date: 2016-12-07
WUHAN UNIV
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Problems solved by technology

There is still a lot of room for improvement in the research of variable power inverters. At present, the existing inverters have not considered the influence o...

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  • Optimal carrier frequency-based design method of inverter
  • Optimal carrier frequency-based design method of inverter
  • Optimal carrier frequency-based design method of inverter

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Embodiment

[0106] A method for designing an inverter based on optimal carrier frequency, comprising the following steps:

[0107]Step 1, design the inverter hardware circuit: the inverter hardware platform mainly includes the main control chip 1, detection and conditioning 2, driver 3 and power main board part, wherein the power main board part includes inverter bridge 4 and filter circuit 5, inverter bridge Including power switching device IGBT loss, parallel diode; filter circuit 5 adopts inductance filter. Such as figure 1 shown.

[0108] Step 2, theoretical modeling to solve the optimal carrier frequency: first analyze the source of the loss of the inverter and classify it, according to the loss of different devices, the loss of the two-level inverter can be divided into the following parts: power switch Device IGBT losses, parallel diode losses and filter inductor losses. Establish a mathematical model for each part; then establish an output harmonic distortion model; finally, ta...

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Abstract

The invention relates to the technical field of a power electronics technology, a digital signal processing technology and a control technology, in particular to an optimal carrier frequency-based design method of an inverter. The method comprises the following steps of (1) building an inverter hardware circuit; (2) building an inverter loss model and an output harmonic distortion model, building an efficiency optimization model by employing a carrier frequency as a variable and solving the optimal carrier frequency under different power by employing the efficiency optimization model; and (3) applying the optimal carrier frequency obtained in the step (2) to the inverter by employing software programming, and finishing the design of the inverter. By the inverter designed by the design method, the inverter loss can be reduced to different extents under the premise of ensuring that the quality of power output by the inverter is good enough; the efficiency is improved; and especially the inverter has more significant efficiency promotion than an ordinary fixed-frequency inverter during low-power output.

Description

technical field [0001] The invention belongs to the fields of power electronics technology, digital signal processing technology and control technology, and in particular relates to a design method of an inverter based on optimal carrier frequency. Background technique [0002] With the continuous advancement of technology, there is an increasing demand for high-quality and controllable electrical energy in daily life. Power electronic devices can efficiently convert various energy sources into high-quality electric energy, and inverters are very important and representative power electronic devices. Because the inverter has the characteristics of high controllability, strong stability and wide applicability, its role is very prominent, so it is widely used in energy, transportation, communication, industrial manufacturing, national defense, aerospace, environmental protection, home appliances, etc. field. At present, although the overall efficiency of the inverter has bee...

Claims

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Application Information

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IPC IPC(8): H02M7/5387
CPCH02M7/5387H02M1/0048Y02B70/10
Inventor 专祥涛唐俊珂刘强
Owner WUHAN UNIV
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