November 2016
Intermediate to advanced
1008 pages
27h 59m
English
Content preview from Power Electronics and Motor Drive SystemsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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7.4. Output Voltage Control of DC–DC Converters Using Pulse Width Modulation Technique
The average value of a dc–dc converter can be varied by varying the pulse width of the gating signal. This control technique is called pulse width modulation (PWM) and is presented in Fig. 7.14. Fig. 7.14(a) shows the control circuit of the PWM technique, and Fig. 7.14(b) shows the definition of the PWM control technique. When the dc input voltage of the converter varies and/or there are voltage drops variations within the converter power circuit the pulse width of the gating signals varies so that the output voltage of the converter to remain constant. As shown in Fig. 7.14(a), the output voltage value is fed to the error amplifier A1 creating an error voltage ...
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