FIELD: single-channel synchronous digital control systems. SUBSTANCE: method using digital control systems depending for their operation on phase control with arc cosine dependence between control pulse phase and control signal intended for controlled three-phase bridge rectifiers incorporating microprocessor control system, wide range of angle control for power rectifier including supply voltage distortion conditions, involves parametric computation of converter control angle and calculation of its numeric value from formula (from its control characteristic expression) using setting value, instant values of input and output variables of converter, other auxiliary variables included during final calculation of numeric value of control angle. Such auxiliary variables are inertia links in digital control system, synchronizing voltage phase shift relative to supply voltage. Predicted value of control angle is obtained before respective pulse actually appears. EFFECT: improved transient characteristics of converter, enlarged functional capabilities of system. 4 dwg
