A new extension of one-cycle control and its application to switching power amplifiers

A new extension of one-cycle control is proposed for controlling DC-AC switching power converters, instability, which occurs in the DC-AC application of this control technique, was observed and resolved. An automatic switching-error correction scheme is developed. This control technique overcomes the nonlinearity of DC-AC switching power converters, eliminates the crossover distortion, rejects the power source ripple, and achieves a large dynamic range and a wide bandwidth. A half-bridge experimental circuit was built to verify the theory. This new extension is suitable for high efficiency, small volume, and low distortion audio power amplification.<<ETX>>

[1]  R.D. Middlebrook,et al.  Modelling and analysis of switching DC-to-DC converters in constant-frequency current-programmed mode , 1979, 1979 IEEE Power Electronics Specialists Conference.

[2]  Robert W. Erickson,et al.  Half-cycle control of the parallel resonant converter operated as a high power factor rectifier , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[3]  K.M. Smedley,et al.  One-cycle control of switching converters , 1991, PESC '91 Record 22nd Annual IEEE Power Electronics Specialists Conference.

[4]  Cecil Deisch,et al.  Simple switching control method changes power converter into a current source , 1978, 1978 IEEE Power Electronics Specialists Conference.

[5]  A. Capel,et al.  Application of the injected current model for the dynamic analysis of switching regulators with the new concept of LC3 modulator , 1978, 1978 IEEE Power Electronics Specialists Conference.