A filter design method for single-phase full-bridge power frequency inverter
A technology for power frequency inverter and filter design, which is applied in the fields of instrumentation, calculation, electrical digital data processing, etc., and can solve the problem of inability to determine the quantitative relationship of filter parameters
Inactive Publication Date: 2019-08-13
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 single-phase full-bridge power frequency inverter filter design method, including calling out the maximum allowable output voltage drop parameter in the inverter design index; then bringing the parameter into the filter parameter formula for calculation; simulating Run the single-phase full-bridge power frequency inverter to capture the THD of the output voltage in the steady state and the load sudden change operation state; compare the THD obtained in step (3) with the design index THD; the former is smaller than the latter, and the design is completed. Compared with the prior art, the present invention can directly realize the load characteristic index of the inverter, and clearly describes the quantitative relationship between the filter parameters and the load characteristic parameters of the inverter. Experiments show that the load transient characteristics achieved by the filtering parameters obtained by the method The error is less than 5%, which has the value of popularization and application.
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