Modulation method for cascaded PWM (pulse-width modulation) rectifier
A modulation method and rectifier technology, which are applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve the problem of increasing the weighted total harmonic distortion index of output voltage and the inability of carrier sideband harmonics Completely eliminate other problems, achieve the effect of eliminating the main harmonic of the grid side current, improving the performance of the grid side current, and reducing the amount of calculation
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[0022] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.
[0023] Cascaded PWM rectifiers can be divided into star connection and delta connection according to the connection mode, and there are certain differences in the balance algorithms used by the two. Among them, due to the certain coupling between the three phases in the star connection, the balance algorithm involves two kinds of balance between phases and within phases, and the implementation is relatively complicated. On the contrary, the delta connection method can de...
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