Design method for single-phase full-bridge power frequency inverter filter
A technology for designing power frequency inverters and filters, which is applied in the fields of instruments, calculations, and special data processing applications, and can solve problems such as the inability to determine the relationship between the number of filter parameters
Inactive Publication Date: 2015-12-23
CHENGDU UNIV OF INFORMATION TECH
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Problems solved by technology
The existing filter design technology cannot determine the quantitative relationship between the filter parameters and the transient load characteristics of the entire inverter, because the existing technology is based on filtering theory rather than on the load transient characteristics of the inverter circuit. Therefore, it is necessary to A new design approach is born
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[0018] The present invention will be further described below in conjunction with accompanying drawing:
[0019] Such as figure 1 Shown: the present invention comprises the following steps:
[0020] (1) Call out the maximum allowable output voltage drop parameter in the inverter design index;
[0021] (2) Bring the parameters in the step (1) into the filter parameter formula to calculate;
[0022] (3) Simulate the operation of a single-phase full-bridge power frequency inverter, and capture the THD of the output voltage in the steady state and the load mutation operation state;
[0023] (4) comparing step (3) gained THD and design index THD;
[0024] (5) In step (4), the former is smaller than the latter, and the filter design is completed.
[0025] Specifically, the transient adjustment time of the design index in the step (1) satisfies t s = t sim , t sim is the maximum optimal loading time, namely: t sim =max{t si =f(Δi o )|Δi o >0}.
[0026] The filter parameter...
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The invention discloses a design method for a single-phase full-bridge power frequency inverter filter. The design method includes the steps that 1, maximal allowable output voltage drop amount parameters in inverter design indexes are called out; 2, then the parameters are substituted into a filtering parameter formula to be calculated; 3, a single-phase full-bridge power frequency inverter is subjected to simulation run, THD of output voltage in a steady state and a load sudden change running state is captured; 4, the THD obtained in the step 3 is compared with the design index THD; 5, if the THD obtained in the step 3 is smaller than the design index THD, design is completed. Compared with the prior art, inverter load characteristic indexes can be directly achieved, the quantitative relation between filter parameters and inverter load characteristic parameters is clearly described, the experiment shows that load transient characteristic errors achieved by filtering parameters obtained through the method are smaller than 5%, and application and popularization value is achieved.
Description
technical field [0001] The invention relates to a circuit design method, in particular to a single-phase full-bridge power frequency inverter filter design method. Background technique [0002] The filter is an indispensable device for the power frequency inverter. It forms an inverter with the square wave inverter circuit to achieve the purpose of filtering out high-frequency components and retaining low-frequency components, and finally realizes the low-frequency AC source. The design of the filter is often based on the filtering theory. The existing filter design technology cannot determine the quantitative relationship between the filter parameters and the transient load characteristics of the entire inverter, because the existing technology is based on filtering theory rather than on the load transient characteristics of the inverter circuit. Therefore, it is necessary to A new design approach was born. Contents of the invention [0003] The object of the present in...
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IPC IPC(8): G06F17/50
Inventor 倪雨
Owner CHENGDU UNIV OF INFORMATION TECH