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Brief introduction to the principle of PWM controller
Release date:
2022-03-10 14:59
Source:
Whether it is PWM controller for home user or ordinary PWM, its basic principle is the same, let the pwm controller company take you to understand the basic principle of PWM.
The basic principle of PWM control is based on: narrow pulses with the same impulse and different shapes have the same effect when they are applied to the link with inertia. According to the PWM control principle, the waveform is divided into 6 equal parts, which can be replaced by 6 square waves. According to whether the carrier signal is synchronized with the modulating signal, PWM control can be divided into synchronous modulation and asynchronous modulation. The characteristic of rectangular wave pulse width modulation is that the output pulse width column is of equal width, and only a certain number of harmonics can be controlled; the characteristic of sine wave pulse width modulation is that the output pulse width column is of unequal width, and the width changes according to the sine law, The output waveform is close to a sine wave. The key to this technology is to generate the pulse width according to the control signal.
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