Self-adapting synchronous modulation method
A synchronous modulation and self-adaptive technology, applied in the control system, AC motor control, electrical components, etc., can solve the problems of truncation error, aggravate the instability and fluctuation of the actual frequency conversion output voltage frequency, etc., and achieve small truncation error and low voltage frequency. The effect of stabilizing and eliminating fluctuations in output current
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[0009] This specific embodiment takes the following technical solutions: its specific implementation method is: 1, initialize f according to actual working conditions First_loadfreq .
[0010] 2. According to the given output voltage frequency command f run calculate f First_loadfreq divide by twice f run remainder of .
[0011] 3. Calculate the new triangular carrier frequency f according to the remainder First_loadfreq .
[0012] The frequency of the triangular carrier wave is always an integer multiple of the modulated sine wave, and without greatly changing the switching frequency, the synchronous modulation of the entire frequency range during frequency conversion can be realized to avoid truncation errors.
[0013] This specific implementation mode adjusts the modulation frequency of the main control system in real time so that it can divide the instruction operating frequency by an integer, so that the generated truncation error is as small as possible, so that the...
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