下载资料简介:
PWM Techniques
Basic Principles of PWM
The equal-area theorem
●This is sinusoidal PWM (SPWM)
●The equal-area theorem can be appliedto realize any shape of waveforms
Some Major PWM Techniques
Natural sampling
●Calculation based on equal-area criterion
●Selected harmonic elimination
●Regular sampling
●Hysteresis-band control
●Triangular wave comparison with
feedback control
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