A Sawtooth Carrier PWM Modulation Method for Symmetrical Odd Phase Two-Level Inverter
A sawtooth carrier and inverter technology, which is applied in electrical components, output power conversion devices, and AC power input into DC power output, etc. CMV suppression effect is weakened and other problems, so as to avoid the increase of voltage total harmonic distortion, reduce the amplitude and frequency, and slow down the changing frequency.
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[0055] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.
[0056] The present invention provides a sawtooth carrier PWM modulation method for symmetrical odd-phase two-level inverters, such as figure 1 shown, including the following steps:
[0057] Step 1. Sort the modulation signals of each phase from large to small, and mark them as u 1 to u m , according to whether the subscript is odd or even, the modulated signals of each phase are divided into t...
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