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By Werner Leonhard; VDI/VDE-Gesellschaft Mess- und Regelungstechnik

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Read Online or Download Control in power electronics and electrical drives : proceedings of the second IFAC symposium, Düsseldorf, Federal Republic of Germany, 3-5 October 1977 PDF

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Extra info for Control in power electronics and electrical drives : proceedings of the second IFAC symposium, Düsseldorf, Federal Republic of Germany, 3-5 October 1977

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Two-pole machine. I t s phase axes ABSTRACT The three-phase semiconductor connections are built a, b, c include angle a. etc. up of elementary three-phase thyristor or diode groups. c. the instantaneous power is machines connected to them the application of Park­ = Pp + p0 , Pp may be vectors and zero sequence components is rewarding. The corresponding constraints of various conduction patterns p = u0 i0 + ub ib + uc ic = where the Park-vector power CC' mponent expressed by the scalar product of the volt­ age and current vector are given in vector form for the voltages and currents.

L 9a). As iDN takes the border position I2 S, the conduc­ b) Fig. 1 8 . One-line and detailed circuit o f the CS! x a �2 �- uopi op er � r--��-+---+-�--11- �, tion of the diode in phase b is terminated , and the third interval r 3 (no overlap) starts. Figure 1 9 shows that all border conditions (for uD P ' too) are satisfied . 2. The differential equations of the CS/. The most simple equations are obtained in a simulation program, therefore the computation time is the shortest, if the reference axes are chosen in the direction of the corre­ sponding main axes in each conduction state.

Voltage, end point of the voltage vector Pa , Nb ii I 0. The last equation is satisfied when the of the hexagon in Fig. is lying o n the side so the differential equations of the d . c. circuit and that If the voltage vector of the three phase machine can be combined. c. voltage I absolute value ii i , ii blocks all the diodes. By increasing the voltage vector < o, simulation program the border conditions for UN c = Ux Uy {3 V3 2-2uP u u V3 V_r:_ 3 = 22 +� 2 <0 tends to step out begin conducting and an other conduction pattern is established.

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