Multiphase power boost converters with sliding mode

On/off operation mode is commonly used for power systems, which results in oscillations with finite frequency and amplitude. These oscillations are called ripple or chattering in control literature. On one hand increasing the switching frequency improve the system accuracy, but on the other hand it leads to high power losses in converters. The design methodology is offered for boost power converters to keep frequency and amplitude at the admissible level simultaneously. The frequency is maintained at the desired level by making the width of hysteresis loop in switching element depending on the system state. The idea of chattering suppression is based on so-called ldquoharmonic cancellationrdquo: the converter consists of several parallel channels, which brings cancellation of high frequency components in the sum of outputs. The method of phase control stems from the theory of multidimensional sliding modes: the desired phase shifts can be provided by a proper choice of switching commands. Implementation of the method does not need any additional hardware.