A simple and low cost of delta modulator for static PWM inverter

The problem of switching frequency over the fundamental period of the modulation signal in fixed band delta modulation is improved by adding a triangular carrier wave to the sinusoidal reference and forcing the integrator output to follow the sum of these two signals is proposed in this paper. The proposed method is applied to the voltage source inverters for variable-speed three-phase induction motor drives applications (VSD).

[1]  Yu Qin,et al.  A novel adaptive hysteresis band current control using a DSP for a power factor corrected on-line UPS , 1997, Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066).

[2]  Dmj Holliday,et al.  Novel adaptive hysteresis band modulation strategy for three-phase inverters , 2001 .

[3]  V. Kinnares,et al.  Comparative performance evaluation of fixed and adaptive hysteresis band delta modulation techniques for UPS , 1999, Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475).

[4]  Tae-Won Chun,et al.  Development of adaptive hysteresis band current control strategy of PWM inverter with constant switching frequency , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[5]  M.A. Rahman,et al.  Dual slope integrator type delta modulator for high performance voltage source inverters , 1997, Proceedings of Power Conversion Conference - PCC '97.

[6]  T. Madusudanan,et al.  A synchronized delta modulation scheme for three-phase inverter drives , 2000, 2000 Canadian Conference on Electrical and Computer Engineering. Conference Proceedings. Navigating to a New Era (Cat. No.00TH8492).