At the same time, it makes on line distinguishing of the model parameters by recursion minimum quadratic multiplication real time correction algorithm with changeable forget factor.

Derived the formula for computing quadratic harmonics of output current in the single phase unit power factor ac DC converter based on analysis of the circuit module of the equivalent current source.

A quadratic rotatable design with 3 factors and 5 levels for each factor was used to optimize the parameters of the dimpled surfaces.