METHOD FOR CURRENT GENERATION IN PHASE WINDINGS OF INDUCTOR-TYPE RELUCTANCE MOTOR Russian patent published in 2004 - IPC

FIELD: electrical engineering; inductor-type reluctance motor control. SUBSTANCE: proposed method boils down to generation of current pulse by driving in conduction both switches of voltage inverter phase; as soon as current rises to desired value, either of inverter power switches is turned off for definite time interval whereupon it is turned on again, and this process is continued up to desired moment when current pulse ceases; then both switches of voltage inverter are closed, time interval of first off-operation of one inverter switch t₀₁ being assumed to equal t₀₁ = n/f_kref where f_kref is desired current pulsation frequency; n is factor; 0 < n < 1, and time intervals of next off-operations, if any, are found from formula where t_0i is time interval of preceding off-operation of one inverter switch; T_k is switching period obtained; T_k = t_k - t_k0, where t_k and t_k0 are last and next to last moments when desired current was attained; at the end of time interval t_0jcurrent is checked for reduction below desired value within this time, otherwise this interval is extended by m/f_kref where m is factor; 0 < m < 1; then check is repeated until above-given condition is satisfied. Desired frequency may vary in the course of current generation. EFFECT: enhanced stability of phase current pulsation frequency. 2 cl, 1 dwg