TY - GEN
T1 - Closed-loop noise properties of pulse-width modulated power converters
AU - Midya, Pallab
AU - Krein, Philip T.
N1 - Publisher Copyright:
© 1995 IEEE.
PY - 1995
Y1 - 1995
N2 - The pulse-width modulation (PWM) process in DC-DC and DC-AC power converters introduces characteristic nonlinear behavior. When PWM is performed in the presence of noise, specific effects are seen on the duty ratio and consequently on the output of the power converter. These effects depend on the PWM feedback control action as well as on the PWM process itself. Small-signal concepts do not model nonlinear noise issues. Here, the probability density function of the duty ratio is obtained analytically given Gaussian external noise. The results are verified by both simulation and experimental test. For a DC-DC power converter, noise is shown to introduce a DC shift at the output. Subharmonics appear as the noise propagates through the PWM control. The degree of nonlinear effect on a power converter depends on the nature of its control. Current mode control, for example, shows strong nonlinear effects. Noise properties of this and other controls, as well as ideas for noise mitigation, are discussed.
AB - The pulse-width modulation (PWM) process in DC-DC and DC-AC power converters introduces characteristic nonlinear behavior. When PWM is performed in the presence of noise, specific effects are seen on the duty ratio and consequently on the output of the power converter. These effects depend on the PWM feedback control action as well as on the PWM process itself. Small-signal concepts do not model nonlinear noise issues. Here, the probability density function of the duty ratio is obtained analytically given Gaussian external noise. The results are verified by both simulation and experimental test. For a DC-DC power converter, noise is shown to introduce a DC shift at the output. Subharmonics appear as the noise propagates through the PWM control. The degree of nonlinear effect on a power converter depends on the nature of its control. Current mode control, for example, shows strong nonlinear effects. Noise properties of this and other controls, as well as ideas for noise mitigation, are discussed.
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U2 - 10.1109/PESC.1995.474786
DO - 10.1109/PESC.1995.474786
M3 - Conference contribution
AN - SCOPUS:84876052271
T3 - PESC Record - IEEE Annual Power Electronics Specialists Conference
SP - 15
EP - 21
BT - Proceedings of PESC 1995 - Power Electronics Specialist Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 26th Annual IEEE Power Electronics Specialists Conference, PESC 1995
Y2 - 18 June 1995 through 22 June 1995
ER -