Title :
Quantization resolution and limit cycling in digitally controlled PWM converters
Author :
Peterchev, Angel V. ; Sanders, Seth R.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
This paper discusses the presence of steady-state limit cycles in digitally controlled pulse-width modulation (PWM) converters, and suggests conditions on the control law and the quantization resolution for their elimination. It then introduces single-phase and multi-phase controlled digital dither as a means of increasing the effective resolution of digital PWM (DPWM) modules, allowing for the use of low resolution DPWM units in high regulation accuracy applications. Bounds on the number of bits of dither that can be used in a particular converter are derived
Keywords :
PWM power convertors; digital control; quantisation (signal); voltage control; analog-to-digital converter; control law; digitally controlled PWM converters; digitally controlled pulse-width modulation converters; multi-phase controlled digital dither; output voltage control; quantization resolution; single-phase controlled digital dither; steady-state limit cycles; Control systems; Digital control; Digital modulation; Limit-cycles; Pulse amplifiers; Pulse width modulation; Pulse width modulation converters; Quantization; Steady-state; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-7067-8
DOI :
10.1109/PESC.2001.954158
