| 摘要 |
FIELD: electrical engineering; inductor-motor drives for dc and ac rolling stock. SUBSTANCE: inductor motor control process boils down to calculation of moments t1 and t2 when supply of voltage pulses to phase winding is initiated and ceased, respectively, from start of rotor position sensor period using formula t1 = T/2-A; t2 = T-A-C where T is period of signal coming from rotor position sensor; A is pulse supply lead; C is shortening of pulse supply zone. Space between t1 and t2 is divided into m more spaces; in order to reduce torque fluctuations current value is found for each space, its value being found from , where M3Thetan is desired torque at n-th space; L(Thetan,in-1) is inductance by end of n-th space at current in-1; L(Thetan-1,in-1) is inductance by end of (n 1) or at start of n-th space at current in-1; DeltaTheta is angle of turn of rotor at n-th space; in-1 is phase current by end of (n 1) space; voltage pulse is not generated if phase current is higher than in, in beginning of n-th space. EFFECT: reduced torque fluctuations due to generating phase currents including changes in control process. 1 cl, 5 dwg |
