Title :
Analysis of conventional/improved delta modulators as switched dynamical systems
Author :
Shimazu, Hiroshi ; Saito, Toshimichi ; Torikai, Hiroyuki
Author_Institution :
Dept. of Electron., Electr. & Comput. Eng., Hosei Univ., Tokyo, Japan
Abstract :
This paper studies dynamics of the delta modulators (DM) and its improvement. The dynamics can be simplified into a 1-D return map, a simple differential equation. Using the return map, we clarify the mechanism for the non-synchronous operation and pulse-dropping phenomenon theoretically. We present a stabilization method of the synchronous phenomena using periodic compulsory switchings. Using a simple test circuit, typical operations are verified in the laboratory.
Keywords :
DC-DC power convertors; PWM invertors; PWM power convertors; delta modulation; differential equations; nonlinear dynamical systems; nonlinear network analysis; stability; switched networks; 1D return map; delta modulators; differential equation; nonsynchronous operation; periodic compulsory switchings; pulse-dropping phenomenon; stabilization method; switched dynamical systems; synchronous phenomena; Capacitors; Circuit testing; Delta modulation; Equations; Equivalent circuits; Hysteresis; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Voltage;
Conference_Titel :
Industrial Electronics Society, 2003. IECON '03. The 29th Annual Conference of the IEEE
Print_ISBN :
0-7803-7906-3
DOI :
10.1109/IECON.2003.1280338
