What is the basic principle of PWM?
1 Answers
PWM works by controlling the switching of inverter circuit devices to produce a series of equal-amplitude pulses at the output, which are used to replace sine waves or other desired waveforms. PWM stands for Pulse Width Modulation, and the following introduces the method of pulse width modulation: 1. The role of overall pulse width modulation: Overall pulse width modulation involves designing a controller for the control object and performing dynamic mathematical calculations on the entire system model based on the required control force, determining the duration and start time for a fixed force output. 2. Operation of the pulse width modulator: The pulse width modulator does not consider the control object model but performs 'dynamic attenuation' accumulation based on the input. After some algorithmic transformation, it determines the duration of the output. This method is very simple and can achieve approximately the same output effect.