3 Phase-controlled DC motor drives

More documents

Recommendations

Info

• Steady-state solution including harmonicsaccurately predict its electromagnetic torque• The speed of the machine and the fieldcurrent are assumed to be constant. ThendiRaaia+ La+ Kbωm=dtvawhere v a = V m sin(ω s t+π/3+α), 0
where ω s = 2πf s , β = tan -1 (ω s L a /R a ) = machineimpedance angle, T a =L a /R a = armature timeconstant, i ai = initial value of current at time t =0, Z a = R a +jω s L a = <strong>motor</strong> electrical impedance.• Critical triggering angle α c : when the armaturecurrent is barely continuous (iai = 0).αc= β + cos−1(E / V{c1m) 1⋅ ⋅(1− ecosβ−(π / 3tanβ))} −• When the current becomes discontinuous, thevoltage across the machine the is the inducedemf itself.π3+ θ1
Page 1 and 2: 3 Phase-controlled DC motor drives
Page 3 and 4: • In field control, the applied a
Page 5 and 6: • Fig. 3.1
Page 7 and 8: • Similarly, the air gap power is
Page 9 and 10: 3.2.5 Four-quadrant operation• Du
Page 11 and 12: • Fig. 3.5 illustrates the speed
Page 13 and 14: • Two basic methods by using stat
Page 15 and 16: • The bridge conduction is delaye
Page 17 and 18: • In the case that the load curre
Page 19 and 20: • Fig. 3.10 is a three-phase thyr
Page 21 and 22: • A control technique to overcome
Page 23 and 24: Control modeling• The gain of the
Page 25 and 26: • Fig. 3.15 is current source con
Page 27 and 28: • Fig. 3.17 is a half-controlled
Page 29 and 30: • Fig. 3.20 shows the converter c
Page 31: • The normalized electromagnetic
Page 35 and 36: • Fig 3.24
Page 37 and 38: 3.6 Transfer functions of the subsy
Page 39 and 40: • Converter (after linearization)
Page 41 and 42: • Fig 3.30 is current-control loo
Page 43 and 44: • The closed-loop transfer functi
Page 45: 3.9 Four-quadrant Dc motor drive•

3 Phase-controlled DC motor drives

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?