svpwm modulation method and system for high frequency chain matrix converter
A technology of matrix converter and modulation method, applied in the direction of converter type, high-efficiency vehicle charging, high-efficiency power electronic conversion, etc., can solve problems such as magnetic saturation of transformer iron core, DC bias of transformer, and bad influence on system safety operation, etc. Achieve the effects of improving system efficiency, suppressing magnetic bias phenomenon, and preventing current bias phenomenon
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Embodiment 1
[0037] The purpose of this embodiment is to provide an SVPWM modulation method for a high-frequency chain-matrix converter.
[0038] An SVPWM modulation method for a high-frequency chain-matrix converter, comprising:
[0039] Divide the sectors according to the phase of the three-phase input voltage, and determine the vector action combination in each sector;
[0040] Calculate the action time of each vector of SVPWM without zero vector according to the action combination of each sector vector;
[0041] Determine the action sequence of each vector of zero-vector SVPWM, so that each vector acts counterclockwise one by one in the entire switching cycle;
[0042] Through the zero-vector SVPWM, an alternating positive and negative high-frequency alternating voltage is formed on the primary side of the high-frequency transformer.
[0043] For ease of understanding, the modulation method described in the present disclosure will be described in detail below with reference to the ac...
Embodiment 2
[0079] The purpose of this embodiment is to provide an SVPWM modulation system for a high-frequency chain-matrix converter.
[0080] An SVPWM modulation system for a high-frequency chain-matrix converter, comprising:
[0081] A vector action combination determination unit, which is used to divide sectors according to the three-phase input voltage phase, and determine the vector action combination in each sector;
[0082] The vector action time determining unit is used to calculate the action time of each vector of the zero-vector SVPWM according to the combination of the vector actions of each sector;
[0083] The vector action sequence determination unit is used to determine the action sequence of each vector of the zero-vector SVPWM, so that each vector acts counterclockwise one by one in the entire switching cycle;
[0084] The SVPWM modulation unit is used to form a high-frequency alternating voltage with alternating positive and negative on the primary side of the high-f...
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