Power electronics Chapter 6 PWM Techniques
PPoowweerr EElleeccttrroonniiccss Chapter 6 PWM Techniques
The most widely used control technique in power electronics DC/DC ACaC Pulse Width Modulation(PWM) (Chopping control) DCIAC AC/DC
Power Electron cs i 2 The most widely used control technique The most widely used control technique in power electronics in power electronics DC/DC AC/AC Pulse Width Modulation (PWM) (Chopping control) DC/AC AC/DC
PEREC Outline 6. 1 Basic principles 6.2 Some major PWm techniques in dCIAC inverters 6.3 PWM techniques with feedback control 6.4 PWM rectifiers 3
Power Electron cs i 3 Outline Outline 6.1 Basic principles Basic principles 6.2 Some major PWM techniques in DC/AC inverters 6.2 Some major PWM techniques in DC/AC inverters 6.3 PWM techniques with feedback control 6.3 PWM techniques with feedback control 6.4 PWM rectifiers 6.4 PWM rectifiers
PEREC 6.1 Basic principles of PWM Similar response to different shape of impulse inpu ( f(4 a-d b e(OD The equal-area theorem f Responses tend to be identical when input signals have same area and time durations of input impulses become very small
Power Electron cs i 4 6.1 Basic principles of PWM Basic principles of PWM Similar response to different shape of impulse input Similar response to different shape of impulse input The equal The equal -area theorem: area theorem: Responses tend to be identical when input signals Responses tend to be identical when input signals have same area and time durations of input impuls have same area and time durations of input impulses become very small. become very small
PEREC Basic principles of PWM Application of the equal-area theorem H ◆ This is sinusoidal PWM (SPWM) 争 The equal-area theorem can be applied to realize any shape of waveforms 4 5
Power Electron cs i 5 Basic principles of PWM Basic principles of PWM Application of the equal Application of the equal -area theorem area theorem This is sinusoidal This is sinusoidal PWM (SPWM) PWM (SPWM) The equal The equal -area theorem can be applied theorem can be applied to realize any shape of to realize any shape of waveforms waveforms