SINUSOIDAL TRIANGULAR CURRENT MODE CONTROL FOR POWER CONVERTER

摘要

A power conversion method and a power converter are disclosed. The method includes providing a phase current reference (Ia*, Ib*, Ic*) for at least one phase (11, 12, 13) of a power converter, wherein the at least one phase (11, 12, 13) comprises an inductor (21, 22, 23) and a switching stage (31, 32, 33) coupled to the inductor (21, 22, 23); defining a current band value (Ibnd; Ibnda(t), Ibndb(t), Ibndc(t)) for the at least one phase (11, 12, 13); calculating a first current limit (Iatop, Ibtop, Ictop) and a second current limit (Iabot, Ibbot, Icbot) based on the phase current reference (Ia*, Ib*, Ic*) and the current band value (Ibnd; Ibnda(t), Ibndb(t), Ibndc(t)); and modulating a phase current (la, Ib, Ic) of the at least one phase (11, 12, 13) such that the phase current (la, Ib, Ic) oscillates between the first current limit (Iatop, Ibtop, Ictop) and the second current limit (Iabot, Ibbot, Icbot).