Control in power electronics and electrical drives : by Rudolf Zwicky; International Federation of Automatic

By Rudolf Zwicky; International Federation of Automatic Control; Symposium on Control in Power Electronics and Electrical Drives

Includes ninety seven papers which offer a important review of the most recent technical concepts during this quickly increasing box. parts of improvement which obtain specific consciousness contain the emergence of energy switching transistors, the applying of microprocessors to rules and keep an eye on of static converters and electric drives, using extra refined keep watch over options and the usage of energy electronics in new program fields.

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Extra resources for Control in power electronics and electrical drives : proceedings of the 3. IFAC Symposium, Lausanne, 12 - 14 Sept. 1983

Example text

4 . For the generalized machine it i s possible to choose the point P so that the resistive losses of the machine are minimized ( 17) Practically , however , the place o f the point P is determined by the structure of the machine or through control of either the power 0 d Fig . 5 . Current-flux diagram The control procedure in accordance with these equations ( 1 9 ) , ( 2 0 ) and ( 2 1 ) causes always a change of the magnetic states of the machine , thus a momentary load control is not possible in these control modes of armature even in the case of the idealized machine .

This ramp current i s considered tc b e supplied to d or q axis s ta tor winding. Then put ting w1 = 0 and wr 0 , equations in both axes becomes quite the same (Fig. (b) ) . So taking d-axis component only , a set of equations ( 14) = ( 10) ( 11 ) ( 12) and L t is called inductance coefficient in this paper . That is , only four parameters (r 1 , L 1 ' , L t ' T0 ) are required for determining the dynamics . Two methods of identifying them are described. ( 15 ) is ob tained, where the subscript i s excluded .

4 i t becomes ob­ v i ou s that T 2 con s i dera b l y dec rea ses � f the f l u x i ncrea ses . Furthermore , the ma tch i ng theorem a pp l i e d i n the fz-determ i na t i on i n eqn . ( 1 0 ) wou l d on l y be va l i d i f a l l the para­ meters ( L 1 , a and oz ) were con s ta n t . Add i ­ t i ona l l y i t mus t be poi n ted out that th i s s i mp l e method of opt i m i zati on ta kes on l y i n to account the s ta tor copper l osses , wherea s the i ron l os s e s , the a dd i t i ona l l os s e s and the ro­ tor l osses are exc l u ded of the con s i dera t i on .

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