CONTROL METHOD OF FOUR-QUADRANT CONVERTER WITH SHAPING OF MODULATING SIGNAL Russian patent published in 2010 - IPC H02M7/5387 H02M7/5395 H02P27/08 B60L9/12 

FIELD: electricity.

SUBSTANCE: in control method of four-quadrant converter with shaping of modulating signal the current flowing through the throttle is controlled by changing the duration of time of application thereto of voltage of alternating voltage source and voltage difference of alternating voltage source and capacity of inlet filter, which are determined by the ratio of modulating sinusoidal signal and clock triangular signal, which are shifted relative to voltage of alternating voltage source through angle where X- inductive resistance of current circuit of throttle at application thereto of voltage of alternating voltage source; I - actual throttle current value; U - actual voltage value of alternating voltage source. Half-period of supply voltage is split into m equal i-x sections equal as to duration of clock period of pulse-width modulation of voltage, where i=1…m. Actual current value of the network for each of the sections is measured. At each half-period there determined is mismatching of actual current values I_i and I_m-i+1 by the formula ΔI_i=I_i-I_m-i+1. The obtained mismatch value is multiplied by integral coefficient obtained from the output of proportional-integral voltage control. In the sections the ordinal number of which is less than m/2, there subtracted is the obtained mismatch value from the specified value of current supplied from proportional-integral voltage control on filter capacitor. In the sections the ordinal number of which is more than m/2, the obtained mismatch value is added to the specified value of current supplied from proportional integral voltage control on filter capacitor. At the next half-period which is similar as to the sign, there formed is modulating function Fm by adding current values obtained in each section separately.

EFFECT: improving quick operation and reliability of control.

4 dwg