Suppression method for high frequency voltage noise of output end of three-phase four-bridge inverter to ground
A three-phase four-arm, high-frequency voltage technology, applied in output power conversion devices, electrical components and other directions, can solve the problems of power consumption of post-level equipment and personnel safety threats, and achieve the effect of reducing high-frequency noise of the earth
Active Publication Date: 2018-10-30
HARBIN ENG UNIV
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the output of each phase of the three-phase four-leg inverter will produce high-frequency noise to the ground, which threatens the safety of power consumption of subsequent equipment and personnel operations.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] The present invention will be further described below in conjunction with the accompanying drawings.
[0025] The design process of a method for suppressing high-frequency noise from the output voltage of a three-phase four-leg inverter to ground described in the patent is described as follows. Because the analysis and design based on the mathematical mechanism of the method proposed in this patent method are relatively complicated, simulation software, such as Matlab software, can be used for auxiliary design from the perspective of application.
[0026] (1) Construct a non-high-frequency capacitor C consistent with the actual hardware system in Matlab or any other software environment that supports power electronic converter simulation H simulation model.
[0027] (2) In the absence of high frequency capacitor C H Run the simulation model under the rated load or possible extreme load conditions to confirm whether the simulation model is running correctly, the output...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses relates to the field of power electronic technologies, and in particular relates to a suppression method for the high frequency voltage noise of the output end of a three-phasefour-bridge inverter to ground. The method comprises the following steps of 1, building a simulation model accordant with an actual hardware system, wherein the model comprising a rectification part,a conversion part and a three-phase four-bridge inverter; 2, determining correct running of the simulation model; 3, primarily selecting the capacitance value CH0 of a high frequency capacitor CH; 4,determining a test high frequency capacitance value CHT; 5, measuring end voltages uH of two ends of CH and a current iH passing through CH, and converting iH into an effective value iHRMS; 6, looking up a capacitor data book, and determining the actual high frequency capacitance CHR; 7, performing experimental verification, and if the effect of eliminating the high frequency noise of the voltageis not achieved, repeating the step 3 to the step 6 until the high frequency noise of the voltage is eliminated. The high frequency noise of each output voltage of the three-phase four-bridge inverter to the ground can be significantly reduced.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a method for suppressing high-frequency voltage noise from an output terminal of a three-phase four-bridge inverter to ground. Background technique [0002] In many occasions where three-phase inverters are used, on the one hand, it is necessary to supply power to single-phase loads; on the other hand, when powering three-phase unbalanced loads, the inverter is required to maintain the balance of the three-phase output voltage. In such occasions, a three-phase four-wire inverter is required. There are many ways to obtain a three-phase four-wire inverter, such as a three-phase inverter with split DC side, or by using transformer isolation to obtain a neutral point on its secondary side to obtain a three-phase four-wire system. Among them, using a three-phase four-leg inverter is a simple and feasible way. However, the output of each phase of the three-phase four-leg in...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H02M1/12
CPCH02M1/12H02M1/123
Inventor 游江廖梦岩彭辉张镠钟
Owner HARBIN ENG UNIV